FROM: NATIONAL SCIENCE FOUNDATION
The challenge of building a better atomic clock and why it matters
Prior to the mid-18th century, it was tough to be a sailor. If your voyage required east-west travel, you couldn't set out to a specific destination and have any real hope of finding it efficiently.
At the time sailors had no reliable method for measuring longitude, the coordinates that measure a point's east-west position on the globe. To find longitude, you need to know the time in two places--the ship you're on, and the port you departed from. By calculating the difference between those times, sailors got a rough estimate of their position. The problem: The clocks back then just couldn't keep time that well. They lost their home port's time almost immediately after departing.
Today, time is just as important to navigation, only instead of calculating positioning with margins of errors measured in miles and leagues, we have GPS systems that are accurate within meters. And instead of springs and gears, our best timepieces rely on cesium atoms and lasers.
But given the history, it's fitting that scientists like Clayton Simien, a National Science Foundation (NSF)-funded physicist at the University of Alabama at Birmingham who works on atomic clocks, was inspired by the story of John Harrison, an English watchmaker who toiled in the 1700s to come up with the first compact marine chronometer. This device marked the beginning of the end for the "longitude problem" that had plagued sailors for centuries.
"If you want to measure distances well, you really need an accurate clock," Simien said.
Despite the massive leaps navigation technology has made since Harrison's time, scientists--many NSF-funded--are looking for new ways to make clocks more accurate, diminishing any variables that might distort precise timekeeping. Some, for example, are looking for ways to better synchronize atomic clocks on earth with GPS satellites in orbit, where atmospheric distortion can limit signal accuracy to degrees that seem minute, but are profound for the precise computer systems that govern modern navigation.
The National Institute of Standards and Technology, Department of Defense, join NSF in the search for even better atomic clocks. But today's research isn't just about building a more accurate timepiece. It's about foundational science that has other ramifications.
'One Mississippi,' or ~9 billion atom oscillations
Atomic clocks precisely measure the ticks of atoms, essentially tossing cesium atoms upward, much like a fountain. Laser-beam photons "cool down" the atoms to very low temperatures, so the atoms can transfer back and forth between a ground state and an excited state.
The trick to this process is finding just the right frequency to move directly between the two states and overcome Doppler shifts that distort rhythm. (Doppler shifts are increases or decreases in wave frequency as the waves move closer or further away -- much like the way a siren's sound changes depending on its distance.)
Laser improvements have helped scientists control atoms better and address the Doppler issue. In fact, lasers helped to facilitate something known as an optical lattice, which can layer atoms into "egg cartons" to immobilize them, helping to eliminate Doppler shifts altogether.
That shift between ground state and excited state (better known as the atomic transition frequency) yields something equivalent to the official definition of a second: 9,192,631,770 cycles of the radiation that gets a cesium atom to vibrate between those two energy states. Today's atomic clocks mostly still use cesium.
NSF-funded physicist Kurt Gibble, of Pennsylvania State University, has an international reputation for assessing accuracy and improving atomic clocks, including some of the most accurate ones in the world: the cesium clocks at the United Kingdom's National Physical Laboratory and the Observatory of Paris in France.
But accurate as those are, Gibble says the biggest advance in atomic clocks will be a move from current-generation microwave frequency clocks -- the only kind currently in operation -- to optical frequency clocks.
The difference between the two types of clocks lies in the frequencies they use to measure the signals their atoms' electrons emit when they change energy levels. The microwave technology keeps reliable time, but optical clocks offer significant improvements. According to Gibble, they're so accurate they would lose less than a second over the lifetime of the universe, or 13.8 billion years.
Despite that promise of more accurate performance, the optical frequency clocks don't currently keep time.
"So far, optical standards don't run for long enough to keep time," Gibble said. "But they will soon."
Optical frequency clocks operate on a significantly higher frequency than the microwave ones, which is why many researchers are exploring their potential with new alkaline rare earth elements, such as ytterbium, strontium and gadolinium.
"The higher frequency makes it a lot easier to be more accurate," Gibble said.
Gibble is starting work on another promising elemental candidate: cadmium. Simien, whose research employs gadolinium, has focused on minimizing--or eliminating if possible--key issues that limit accuracy.
"Nowadays, the biggest obstacle, in my opinion is the black body radiation shift," Simien said. "The black body radiation shift is a symptomatic effect. We live in a thermal environment, meaning its temperature fluctuates. Even back in the day, a mechanical clock had pieces that would heat up and expand or cool down and contract.
"A clock's accuracy varied with its environment. Today's system is no longer mechanical and has better technology, but it is still susceptible to a thermal environment's effects. Gadolinium is predicted to have a significantly reduced black body relationship compared to other elements implemented and being proposed as new frequency standards."
While Simien and Gibble agree that optical frequency research represents the next generation of atomic clocks, they recognize that most people don't really care if the Big Bang happened 13 billion years ago or 13 billion years ago plus one second.
"It's important to understand that one more digit of accuracy is not always just fine tuning something that is probably already good enough," said John Gillaspy, an NSF program director who reviews funding for atomic clock research for the agency's physics division. "Extremely high accuracy can sometimes mean a qualitative breakthrough which provides the first insight into an entirely new realm of understanding--a revolution in science."
Gillaspy cited the example of American physicist Willis Lamb, who in the middle of the last century measured a tiny frequency shift that led theorists to reformulate physics as we know it, and earned him a Nobel Prize. While research to improve atomic clocks is sometimes dismissed as trying to make ultra-precise clocks even more precise, the scientists working in the field know their work could potentially change the world in profound, unexpected ways.
"Who knows when the next breakthrough will come, and whether it will be in the first digit or the 10th?" Gillaspy continued. "Unfortunately, most people cannot appreciate why more accuracy matters."
From Wall Street to 'Interstellar'
Atomic clock researchers point to GPS as the most visible application of the basic science they study, but it's only one of this foundational work's potential benefits.
Many physicists expect it to provide insight that will illuminate our understanding of fundamental physics and general relativity. They say new discoveries will also advance quantum computing, sensor development and other sensitive instrumentation that requires clever design to resist natural forces like gravity, magnetic and electrical fields, temperature and motion.
The research also has implications beyond the scientific world. Financial analysts worry that worldwide markets could lose millions due to ill-synchronized clocks.
On June 30 th at 7:59:59 p.m. EDT, the world adds what is known as a "leap second" to keep solar time within 1 second of atomic time. History has shown, however, that this adjustment to clocks around the world is often done incorrectly. Many major financial markets are taking steps ranging from advising firms on how to deal with the adjustment to curtailing after-hours trading that would occur when the change takes place.
Gibble says the goal of moving to ever more accurate clocks isn't to more precisely measure time over a long period.
"It's the importance of being able to measure small time differences."
GPS technology, for example, looks at the difference of the propagation of light from multiple satellites. To provide location information, several GPS satellites send out signals at the speed of light--or one foot per nanosecond--saying where they are and what time they made their transmissions.
"Your GPS receiver gets the signals and looks at the time differences of the signals--when they arrive compared to when they said they left," Gibble said. "If you want to know where you are to a couple of feet, you need to have timing to a nanosecond--a billionth of a second."
In fact, he said, if you want that system to continue to accurately operate for a day, or for weeks, you need timing significantly better than that. Getting a GPS to guide us in deserts, tropical forests, oceans and other areas where roads aren't around to help as markers along the way--one needs clocks with nanosecond precision in GPS satellites to keep us from getting lost.
And if you're not traveling to those locales, then there's still the future to think about.
"Remember the movie, 'Interstellar,'" Simien said. "There is someone on a spaceship far away, and Matthew McConaughey is on a planet in a strong gravitational field. He experiences reality in terms of hours, but the other individual back on the space craft experiences years. That's general relativity. Atomic clocks can test this kind of fundamental theory and its various applications that make for fascinating science, and as you can see, they also expand our lives."
-- Ivy F. Kupec,
Investigators
Kurt Gibble
Clayton Simien
Related Institutions/Organizations
University of Alabama at Birmingham
Pennsylvania State Univ University Park
Showing posts with label RESEARCH. Show all posts
Showing posts with label RESEARCH. Show all posts
Wednesday, July 8, 2015
Monday, July 6, 2015
WHEN LANGUAGES DIE
FROM: NATIONAL SCIENCE FOUNDATION
Documenting endangered languages
The N|uu language, spoken by a few elderly people in South Africa, has features that help build a greater understanding of human language
There are fewer than half a dozen people left in the world who are native speakers of N|uu, a Khoisan language traditionally spoken in the Northern Cape of South Africa. The remaining speakers now live in and around the town of Upington. Sadly, they are elderly and when they die, the language likely will die with them.
"When one of these languages dies, it's a part of our human cultural heritage that is dying," says Chris Collins, a professor of linguistics at New York University. "These languages have unique features that tell us much about human language in general. When they die, it's a real tragedy."
Collins studies Khoisan languages, which are a group of non-Bantu languages of eastern and southern Africa that have "click" consonants. These languages fall into three subgroups: northern, central and southern, with two outliers in eastern Africa. How these subgroups are related historically is an open question, he says.
In recent years, Collins has been focusing on N|uu, which for a long time experts feared had been lost. But in 1997, the late linguist Anthony Traill interviewed a woman in her 90s, Elsie Vaalbooi, and verified that she was speaking N|uu. Ultimately, other surviving speakers were identified as a result of their attempts to reclaim ancestral lands taken from them under apartheid.
"Nobody was aware that the language still existed," Collins says. "It was a surprise. Everybody thought it was dead, but it wasn't."
But "it's going to die very quickly because there are so few speakers left, and they are all older than 60. They are trying to teach it to succeeding generations, but it's not easy, and there's not a lot of money to do it."
Collins does not speak N|uu, but he is studying and documenting its complexities, believing that insights about this unusual language add to the expanding knowledge of human language.
"I find N|uu and other Khoisan languages fascinating," he says. "Each has unique structures, not found in any other languages on Earth. By studying these, you gain insights into the human capacity for language."
Collins recently received a prestigious fellowship from the John Simon Guggenheim Memorial Foundation, which annually supports a diverse group of scholars, artists, and scientists chosen on the basis of prior achievement and exceptional promise.
Collins also has received a series of grants in recent years from the National Science Foundation (NSF) for his linguistic research, totaling about $400,000. The NSF-funded work also includes research on other Khoisan languages, including ǂHoã, Sasi and Juǀ'hoan, funding for a cross-linguistic syntactic database, as well as for the African Linguistics School.
The NSF-supported work on ǂHoã resulted in a grammatical description of the language, co-authored with the late linguist Jeffrey S. Gruber.
"One of the most remarkable features of ǂHoã is its complicated system of plurality," Collins says. "In English, to form a plural of a noun like "cat", one adds an "s" to form "cats". ǂHoã has a much more complicated system involving double plurals, with both a plural prefix and a plural suffix, that depends on the type of possessor a noun has, for example, 'their houses' has a different plural than 'their mothers.'
"Also, in ǂHoã, a verb can be put into the plural, in which case it means that the event described by the verb takes place several times," he adds. "For example, in ǂHoã, 'I shot' could be pluralized as 'I shots,' meaning I shot several times. Linguists refer to this way of pluralizing verbs as pluractionality. Studies of languages with pluractionality morphemes have deep implications for the study of the meaning of verbs in natural language."
Collins, together with the late linguist Henry J. Honken, also have shown that other Khoisan languages have traces of the complicated system of plurality found in ǂHoã.
In the case of N|uu, he and a linguist colleague in Namibia, Levi Namaseb, produced a grammatical sketch of the language, a book that provides an overview of its unusual structures. Collins and Namaseb worked together with American linguists Amanda Miller and Bonny Sands, who documented the sound system of N|uu.
As one example of a unique syntactic feature, N|uu uses a particular word to introduce expressions into the verb phrase, which he calls the "linker." This word sounds like "ng'' that one finds in the English word "sing".
For example, if someone were to say "I am afraid of your dog," it would be "I am afraid ng your dog" in N|uu. "It looks like it plays the role of 'of' but it doesn't always have the same role in the N|uu language that 'of' has in English," he says.
Also, the linker introduces adverbs. "He will dance ng tomorrow."
"Although the linker appears with a post-verbal adverb, it does not appear with a pre-verbal adverb, as in 'he will tomorrow dance,"' Collins says. "The linker is also found in 'how' questions, for example, 'how will he chop ng the wood?"
Collins' goal is to try to understand the bewildering array of contexts in which the linker appears, and to document how its use varies among the Khoisan languages.
"These results tell us about how a particular group of human languages organizes the verb phrase, and thus help establish the kinds of cross-linguistic variation a general theory of human language must account for," he says.
As it turns out, a subset of the Khoisan languages - the northern and southern Khoisan languages--all have a linker with similar properties that are not present either in the surrounding Bantu languages or in the central Khoisan languages.
"It is unclear how the northern and southern Khoisan languages all came to have the linker," he says. "One hypothesis is that they borrowed it from each other after a period of extensive pre-historic contact. Another hypothesis is that the languages share a common ancestor, and that is why they all have the linker. I think personally that the northern and southern Khoisan languages are historically related, but the evidence is not so compelling. How did they come to share a linker? It has a very specific kind of syntax."
To gather their material, he and Namaseb conducted extensive interviews over three summers with the remaining N|uu speakers, who also speak Afrikaans, asking specific questions about language constructions, and recording the responses. They also recorded a number of stories told by the N|uu consultants.
In addition to his language research, Collins also was one of the primary organizers of the African Linguistics School (ALS), which is held every two years, most recently in Accra, Ghana (2009), Porto Novo, Benin (2011, with NSF support under a grant titled "African Linguistics School") and Ibadan, Nigeria (2013).
The ALS is a two-week institute that takes place during the summer, and brings the latest work in core areas of linguistics to 70 students from African universities. The areas of focus are syntax, semantics, phonology, sociolinguistics and fieldwork.
"We have been very successful in helping graduate students to find research topics, to complete their dissertations and to gain admissions into competitive European and North American graduate schools," he says. "These students are very eager and very smart, and we have a lot of high caliber teachers. Organizing and teaching at the ALS has been one of the most rewarding of all my teaching experiences."
-- Marlene Cimons, National Science Foundation
-- Maria C. Zacharias
Investigators
Christopher Collins
John Singler
Amanda Miller
Related Institutions/Organizations
Cornell University
New York University
Documenting endangered languages
The N|uu language, spoken by a few elderly people in South Africa, has features that help build a greater understanding of human language
There are fewer than half a dozen people left in the world who are native speakers of N|uu, a Khoisan language traditionally spoken in the Northern Cape of South Africa. The remaining speakers now live in and around the town of Upington. Sadly, they are elderly and when they die, the language likely will die with them.
"When one of these languages dies, it's a part of our human cultural heritage that is dying," says Chris Collins, a professor of linguistics at New York University. "These languages have unique features that tell us much about human language in general. When they die, it's a real tragedy."
Collins studies Khoisan languages, which are a group of non-Bantu languages of eastern and southern Africa that have "click" consonants. These languages fall into three subgroups: northern, central and southern, with two outliers in eastern Africa. How these subgroups are related historically is an open question, he says.
In recent years, Collins has been focusing on N|uu, which for a long time experts feared had been lost. But in 1997, the late linguist Anthony Traill interviewed a woman in her 90s, Elsie Vaalbooi, and verified that she was speaking N|uu. Ultimately, other surviving speakers were identified as a result of their attempts to reclaim ancestral lands taken from them under apartheid.
"Nobody was aware that the language still existed," Collins says. "It was a surprise. Everybody thought it was dead, but it wasn't."
But "it's going to die very quickly because there are so few speakers left, and they are all older than 60. They are trying to teach it to succeeding generations, but it's not easy, and there's not a lot of money to do it."
Collins does not speak N|uu, but he is studying and documenting its complexities, believing that insights about this unusual language add to the expanding knowledge of human language.
"I find N|uu and other Khoisan languages fascinating," he says. "Each has unique structures, not found in any other languages on Earth. By studying these, you gain insights into the human capacity for language."
Collins recently received a prestigious fellowship from the John Simon Guggenheim Memorial Foundation, which annually supports a diverse group of scholars, artists, and scientists chosen on the basis of prior achievement and exceptional promise.
Collins also has received a series of grants in recent years from the National Science Foundation (NSF) for his linguistic research, totaling about $400,000. The NSF-funded work also includes research on other Khoisan languages, including ǂHoã, Sasi and Juǀ'hoan, funding for a cross-linguistic syntactic database, as well as for the African Linguistics School.
The NSF-supported work on ǂHoã resulted in a grammatical description of the language, co-authored with the late linguist Jeffrey S. Gruber.
"One of the most remarkable features of ǂHoã is its complicated system of plurality," Collins says. "In English, to form a plural of a noun like "cat", one adds an "s" to form "cats". ǂHoã has a much more complicated system involving double plurals, with both a plural prefix and a plural suffix, that depends on the type of possessor a noun has, for example, 'their houses' has a different plural than 'their mothers.'
"Also, in ǂHoã, a verb can be put into the plural, in which case it means that the event described by the verb takes place several times," he adds. "For example, in ǂHoã, 'I shot' could be pluralized as 'I shots,' meaning I shot several times. Linguists refer to this way of pluralizing verbs as pluractionality. Studies of languages with pluractionality morphemes have deep implications for the study of the meaning of verbs in natural language."
Collins, together with the late linguist Henry J. Honken, also have shown that other Khoisan languages have traces of the complicated system of plurality found in ǂHoã.
In the case of N|uu, he and a linguist colleague in Namibia, Levi Namaseb, produced a grammatical sketch of the language, a book that provides an overview of its unusual structures. Collins and Namaseb worked together with American linguists Amanda Miller and Bonny Sands, who documented the sound system of N|uu.
As one example of a unique syntactic feature, N|uu uses a particular word to introduce expressions into the verb phrase, which he calls the "linker." This word sounds like "ng'' that one finds in the English word "sing".
For example, if someone were to say "I am afraid of your dog," it would be "I am afraid ng your dog" in N|uu. "It looks like it plays the role of 'of' but it doesn't always have the same role in the N|uu language that 'of' has in English," he says.
Also, the linker introduces adverbs. "He will dance ng tomorrow."
"Although the linker appears with a post-verbal adverb, it does not appear with a pre-verbal adverb, as in 'he will tomorrow dance,"' Collins says. "The linker is also found in 'how' questions, for example, 'how will he chop ng the wood?"
Collins' goal is to try to understand the bewildering array of contexts in which the linker appears, and to document how its use varies among the Khoisan languages.
"These results tell us about how a particular group of human languages organizes the verb phrase, and thus help establish the kinds of cross-linguistic variation a general theory of human language must account for," he says.
As it turns out, a subset of the Khoisan languages - the northern and southern Khoisan languages--all have a linker with similar properties that are not present either in the surrounding Bantu languages or in the central Khoisan languages.
"It is unclear how the northern and southern Khoisan languages all came to have the linker," he says. "One hypothesis is that they borrowed it from each other after a period of extensive pre-historic contact. Another hypothesis is that the languages share a common ancestor, and that is why they all have the linker. I think personally that the northern and southern Khoisan languages are historically related, but the evidence is not so compelling. How did they come to share a linker? It has a very specific kind of syntax."
To gather their material, he and Namaseb conducted extensive interviews over three summers with the remaining N|uu speakers, who also speak Afrikaans, asking specific questions about language constructions, and recording the responses. They also recorded a number of stories told by the N|uu consultants.
In addition to his language research, Collins also was one of the primary organizers of the African Linguistics School (ALS), which is held every two years, most recently in Accra, Ghana (2009), Porto Novo, Benin (2011, with NSF support under a grant titled "African Linguistics School") and Ibadan, Nigeria (2013).
The ALS is a two-week institute that takes place during the summer, and brings the latest work in core areas of linguistics to 70 students from African universities. The areas of focus are syntax, semantics, phonology, sociolinguistics and fieldwork.
"We have been very successful in helping graduate students to find research topics, to complete their dissertations and to gain admissions into competitive European and North American graduate schools," he says. "These students are very eager and very smart, and we have a lot of high caliber teachers. Organizing and teaching at the ALS has been one of the most rewarding of all my teaching experiences."
-- Marlene Cimons, National Science Foundation
-- Maria C. Zacharias
Investigators
Christopher Collins
John Singler
Amanda Miller
Related Institutions/Organizations
Cornell University
New York University
Sunday, July 5, 2015
COMPUTER MODELING THE U.S. ECONOMY
FROM: NATIONAL SCIENCE FOUNDATION
Foreseeing US economic trends
Tim Kehoe's computer models gather international market data, predict impact of policy changes
Although economist Tim Kehoe's computer models are complex--analyzing numerous data sets related to the buying and selling of goods and services, trade and investment, saving and lending--the underlying premise of his research is simple.
He studies how people make economic decisions over time. Producers, for example, must look ahead and try to forecast prices, taking into account how consumer demand is going to change. At the same time, consumers making future buying choices must think about what might happen to their income during the same period.
Kehoe is developing computer models to try to accurately predict the likely outcomes.
"There is uncertainty about productivity and government policies, so many people uncertain about what's going to happen in the future make their plans contingent," says Kehoe, a professor of economics at the University of Minnesota and an adviser to the Federal Reserve Bank of Minneapolis. "If I am a firm and I want to sell my product in a foreign market, and I'm worried about what's going to happen to prices in that foreign market, I'll want to know how the price for those goods will translate into income in my home country."
Kehoe's research and teaching focus on the theory and application of general equilibrium models, which, in economics, attempt to explain the behavior of supply, demand and prices with several or many interacting markets with the assumptions that a set of prices exists that will generate an equilibrium.
These insights could prove especially valuable to policy makers and business leaders looking to foresee future U.S. economic trends.
Kehoe's work involves, among other things, creating models that predict the effects of trade liberalization on the allocation of resources across various sectors of the economy, in particular how this leads to a boom in foreign investment that could leave a country and its financial system vulnerable to a financial crisis.
He also develops models that analyze the impact of trade policies on the structure of industries, for example, the effects of the North American Free Trade Agreement, or NAFTA.
Among other things, Kehoe consulted with the Spanish government in 1986 on the wisdom of joining the European Community; the Mexican government in 1994 on the impact of joining NAFTA; and the government of Panama in 1998 on the effects of unilateral foreign trade and investment reforms.
He has been the recipient of nine National Science Foundation (NSF) grants starting in 1982--totaling about $1.5 million. More recently, he received a prestigious fellowship from the John Simon Guggenheim Memorial Foundation, which annually supports a diverse group of scholars, artists and scientists chosen on the basis of prior achievement and exceptional promise.
Since the early 1990s, the United States has borrowed heavily from its trading partners, and "we wanted to look at what would happen if the foreigners save less and, therefore, lend less to the United States, "he says. "Will it happen in an orderly way, or end in a crisis?"
He and his collaborators modeled U.S. borrowing resulting from a global savings glut--where foreigners sell goods and services to the United States, but prefer purchasing U.S. assets to purchasing U.S. goods and services--using four key data sets of the United States and its position in the world economy during a 20-year period beginning in 1992.
In the model, as in the data, the U.S. trade deficit first increases, then decreases; the U.S. real exchange rate first appreciates, then depreciates; a deficit in goods trade fuels the U.S. trade deficit, with a steady U.S. surplus in the service trade; and the fraction of U.S labor dedicated to producing goods--agriculture, mining and manufacturing--falls throughout the period.
Using their models, he and his colleagues analyzed two possible ends to the saving glut: an orderly, gradual rebalancing and a disorderly, sudden stop in foreign lending as occurred in Mexico in 1995–96.
"We found that a sudden stop would be very disruptive for the U.S. economy in the short term, particularly for the construction industry, "he says. "In the long term, however, a sudden stop would have a surprisingly small impact."
"As the U.S. trade deficit becomes a surplus, gradually or suddenly, employment in goods production will not return to its level in the early 1990s because much of this surplus will be exports of services and because much of the decline in employment in goods production has been, and will be, due to faster productivity growth in goods than in services," he adds. "We will probably produce more services, such as managerial or design services," to make up for the trade deficit decline.
"The United States is the biggest service exporter in the world, and, as services become more and more expensive, the U.S. can sell services at a higher price and buy goods from other countries more cheaply," he says.
Models are not perfect, and have been wrong in the past. His ongoing goal is to change that.
"When economists built models of the impact of trade and investment liberalization in North America 20 years ago...some of our predictions were right, but some predictions were wrong," he says. "We want to understand why, and what we still need to learn about building models, and especially think about what we got wrong and what we need to do in the future."
-- Marlene Cimons, National Science Foundation
-- Maria C. Zacharias
Investigators
Timothy Kehoe
David Levine
Brig 'Chip' Elliott
Foreseeing US economic trends
Tim Kehoe's computer models gather international market data, predict impact of policy changes
Although economist Tim Kehoe's computer models are complex--analyzing numerous data sets related to the buying and selling of goods and services, trade and investment, saving and lending--the underlying premise of his research is simple.
He studies how people make economic decisions over time. Producers, for example, must look ahead and try to forecast prices, taking into account how consumer demand is going to change. At the same time, consumers making future buying choices must think about what might happen to their income during the same period.
Kehoe is developing computer models to try to accurately predict the likely outcomes.
"There is uncertainty about productivity and government policies, so many people uncertain about what's going to happen in the future make their plans contingent," says Kehoe, a professor of economics at the University of Minnesota and an adviser to the Federal Reserve Bank of Minneapolis. "If I am a firm and I want to sell my product in a foreign market, and I'm worried about what's going to happen to prices in that foreign market, I'll want to know how the price for those goods will translate into income in my home country."
Kehoe's research and teaching focus on the theory and application of general equilibrium models, which, in economics, attempt to explain the behavior of supply, demand and prices with several or many interacting markets with the assumptions that a set of prices exists that will generate an equilibrium.
These insights could prove especially valuable to policy makers and business leaders looking to foresee future U.S. economic trends.
Kehoe's work involves, among other things, creating models that predict the effects of trade liberalization on the allocation of resources across various sectors of the economy, in particular how this leads to a boom in foreign investment that could leave a country and its financial system vulnerable to a financial crisis.
He also develops models that analyze the impact of trade policies on the structure of industries, for example, the effects of the North American Free Trade Agreement, or NAFTA.
Among other things, Kehoe consulted with the Spanish government in 1986 on the wisdom of joining the European Community; the Mexican government in 1994 on the impact of joining NAFTA; and the government of Panama in 1998 on the effects of unilateral foreign trade and investment reforms.
He has been the recipient of nine National Science Foundation (NSF) grants starting in 1982--totaling about $1.5 million. More recently, he received a prestigious fellowship from the John Simon Guggenheim Memorial Foundation, which annually supports a diverse group of scholars, artists and scientists chosen on the basis of prior achievement and exceptional promise.
Since the early 1990s, the United States has borrowed heavily from its trading partners, and "we wanted to look at what would happen if the foreigners save less and, therefore, lend less to the United States, "he says. "Will it happen in an orderly way, or end in a crisis?"
He and his collaborators modeled U.S. borrowing resulting from a global savings glut--where foreigners sell goods and services to the United States, but prefer purchasing U.S. assets to purchasing U.S. goods and services--using four key data sets of the United States and its position in the world economy during a 20-year period beginning in 1992.
In the model, as in the data, the U.S. trade deficit first increases, then decreases; the U.S. real exchange rate first appreciates, then depreciates; a deficit in goods trade fuels the U.S. trade deficit, with a steady U.S. surplus in the service trade; and the fraction of U.S labor dedicated to producing goods--agriculture, mining and manufacturing--falls throughout the period.
Using their models, he and his colleagues analyzed two possible ends to the saving glut: an orderly, gradual rebalancing and a disorderly, sudden stop in foreign lending as occurred in Mexico in 1995–96.
"We found that a sudden stop would be very disruptive for the U.S. economy in the short term, particularly for the construction industry, "he says. "In the long term, however, a sudden stop would have a surprisingly small impact."
"As the U.S. trade deficit becomes a surplus, gradually or suddenly, employment in goods production will not return to its level in the early 1990s because much of this surplus will be exports of services and because much of the decline in employment in goods production has been, and will be, due to faster productivity growth in goods than in services," he adds. "We will probably produce more services, such as managerial or design services," to make up for the trade deficit decline.
"The United States is the biggest service exporter in the world, and, as services become more and more expensive, the U.S. can sell services at a higher price and buy goods from other countries more cheaply," he says.
Models are not perfect, and have been wrong in the past. His ongoing goal is to change that.
"When economists built models of the impact of trade and investment liberalization in North America 20 years ago...some of our predictions were right, but some predictions were wrong," he says. "We want to understand why, and what we still need to learn about building models, and especially think about what we got wrong and what we need to do in the future."
-- Marlene Cimons, National Science Foundation
-- Maria C. Zacharias
Investigators
Timothy Kehoe
David Levine
Brig 'Chip' Elliott
Friday, July 3, 2015
FED FUNDING OF SCIENCE AND ENGINEERING INSTITUTIONS DROPS 6%
FROM: NATIONAL SCIENCE FOUNDATION
Federal funding for science and engineering at universities down 6 percent
Latest figures show obligations down for R&D and facilities that support science and engineering
Federal agencies obligated $29 billion to 995 science and engineering academic institutions in fiscal year 2013, according to a new report from the National Science Foundation's (NSF) National Center for Science and Engineering Statistics (NCSES). The figure represents a 6 percent decline in current dollars from the previous year, when agencies provided $31 billion to 1,073 institutions.
After adjustment for inflation, federal science and engineering obligations to academic institutions dropped by $1 billion from FY 2011 to FY 2012, and by $2 billion between FY 2012 and FY 2013. The obligations fall into six categories:
Research and development;
R&D plant (facilities and fixed equipment, such as reactors, wind tunnels and particle accelerators);
Facilities and equipment for instruction in science and engineering;
Fellowships, traineeships and training grants;
General support for science and engineering;
Other science and engineering activities.
Of those categories, research and development accounted for 89 percent of total federal obligations during the past three years.
The three largest providers of federal funding in fiscal 2013 were the Department of Health and Human Services (58 percent), NSF (17 percent) and the Department of Defense (12 percent). The Department of Energy, the Department of Agriculture and NASA provided the remainder of funding (11 percent, combined). Of these six agencies, only the Department of Energy showed increased obligations between FY 2012 and FY 2013.
The leading 20 universities, ranked in terms of federal academic S&E obligations, accounted for 37 percent of the FY 2013 federal total. The Johns Hopkins University continued to receive the most federal obligations of any university, at $1.5 billion.
NCSES collects information about federal obligations to independent nonprofit institutions in two categories: research and development, and R&D plant. The $6.6 billion provided to 1,068 institutions in FY 2013 represented a 2 percent decrease from $6.8 billion the previous year. The leading 10 nonprofits accounted for 36 percent of fiscal 2013 funding, with the MITRE Corporation receiving the largest total, at $485 million.
The statistics are from the NCSES Survey of Federal Science and Engineering Support to Universities, Colleges and Nonprofit Institutions.
-NSF-
Media Contacts
Rob Margetta, NSF
Federal funding for science and engineering at universities down 6 percent
Latest figures show obligations down for R&D and facilities that support science and engineering
Federal agencies obligated $29 billion to 995 science and engineering academic institutions in fiscal year 2013, according to a new report from the National Science Foundation's (NSF) National Center for Science and Engineering Statistics (NCSES). The figure represents a 6 percent decline in current dollars from the previous year, when agencies provided $31 billion to 1,073 institutions.
After adjustment for inflation, federal science and engineering obligations to academic institutions dropped by $1 billion from FY 2011 to FY 2012, and by $2 billion between FY 2012 and FY 2013. The obligations fall into six categories:
Research and development;
R&D plant (facilities and fixed equipment, such as reactors, wind tunnels and particle accelerators);
Facilities and equipment for instruction in science and engineering;
Fellowships, traineeships and training grants;
General support for science and engineering;
Other science and engineering activities.
Of those categories, research and development accounted for 89 percent of total federal obligations during the past three years.
The three largest providers of federal funding in fiscal 2013 were the Department of Health and Human Services (58 percent), NSF (17 percent) and the Department of Defense (12 percent). The Department of Energy, the Department of Agriculture and NASA provided the remainder of funding (11 percent, combined). Of these six agencies, only the Department of Energy showed increased obligations between FY 2012 and FY 2013.
The leading 20 universities, ranked in terms of federal academic S&E obligations, accounted for 37 percent of the FY 2013 federal total. The Johns Hopkins University continued to receive the most federal obligations of any university, at $1.5 billion.
NCSES collects information about federal obligations to independent nonprofit institutions in two categories: research and development, and R&D plant. The $6.6 billion provided to 1,068 institutions in FY 2013 represented a 2 percent decrease from $6.8 billion the previous year. The leading 10 nonprofits accounted for 36 percent of fiscal 2013 funding, with the MITRE Corporation receiving the largest total, at $485 million.
The statistics are from the NCSES Survey of Federal Science and Engineering Support to Universities, Colleges and Nonprofit Institutions.
-NSF-
Media Contacts
Rob Margetta, NSF
REGULATING METHANE EMISSIONS FROM FRESHWATER WETLANDS
FROM: NATIONAL SCIENCE FOUNDATION
Methane-eating microorganisms help regulate emissions from wetlands
Without this process, methane emissions from freshwater wetlands could be 30 to 50 percent higher
Though they occupy a small fraction of Earth's surface, freshwater wetlands are the largest natural source of methane emitted into the atmosphere. New research identifies an unexpected process that acts as a key gatekeeper in regulating methane emissions from these freshwater environments.
The study results are published this week in the journal Nature Communications by biologist Samantha Joye of the University of Georgia and colleagues.
The researchers report that high rates of anaerobic (no oxygen) methane oxidation in freshwater wetlands substantially reduce atmospheric emissions of methane.
New attention
The process of anaerobic methane oxidation was once considered insignificant in freshwater wetlands, but scientists now think very differently about its importance.
"Some microorganisms actually eat methane, and recent decades have seen an explosion in our understanding of the way they do this," says Matt Kane, program director in the National Science Foundation's Division of Environmental Biology, which funded the research. "These researchers demonstrate that if it were not for an unusual group of methane-eating microbes that live in freshwater wetlands, far more methane would be released into the atmosphere."
Although anaerobic methane oxidation in freshwater has been gathering scientific attention, the environmental relevance of this process was unknown until recently, Joye says.
"This paper reports a previously unrecognized sink for methane in freshwater sediments, soils and peats: microbially-mediated anaerobic oxidation of methane," she says. "The fundamental importance of this process in freshwater wetlands underscores the critical role that anaerobic oxidation of methane plays on Earth, even in freshwater habitats."
Without this process, Joye says, methane emissions from freshwater wetlands could be 30 to 50 percent greater.
Comparison of wetlands
The researchers investigated the anaerobic oxidation process in freshwater wetlands in three regions: the freshwater peat soils of the Florida Everglades; a coastal organic-rich wetland in Acadia National Park, Maine; and a tidal freshwater wetland in coastal Georgia.
All three sites were sampled over multiple seasons.
The anaerobic oxidation of methane was coupled to some extent with sulfate reduction. Rising sea levels, for example, would result in increased sulfate, which could fuel greater rates of anaerobic oxidation.
Similarly, with saltwater intrusion into coastal freshwater wetlands, increasing sulfate inhibits microbial methane formation, or methanogenesis.
So while freshwater wetlands are known to be significant methane sources, their low sulfate concentrations previously led most researchers to conclude that anaerobic oxidation of methane was not important in these regions.
Crucial process
The new findings show that if not for the anaerobic methane oxidation process, freshwater environments would account for an even greater portion of the global methane budget.
"The process of anaerobic oxidation of methane in freshwater wetlands appears to be different than what we know about this process in marine sediments," Joye says. "There could be unique biochemistry at work."
Adds Katherine Segarra, an oceanographer at the U.S. Department of the Interior's Bureau of Ocean Energy Management and co-author of the paper: "This study furthers the understanding of the global methane budget, and may have ramifications for the development of future greenhouse gas models."
Additional financial support for the research was provided by the Deutsche Forschungsgemeinschaft via the Research Center/Cluster of Excellence at the MARUM Center for Marine Environmental Sciences and department of geosciences at the University of Bremen, Germany.
-- Cheryl Dybas
-- Alan Flurry, University of Georgia
Investigators
Samantha Joye
Christof Meile
Vladimir Samarkin
Related Institutions/Organizations
University of Georgia Research Foundation Inc
Methane-eating microorganisms help regulate emissions from wetlands
Without this process, methane emissions from freshwater wetlands could be 30 to 50 percent higher
Though they occupy a small fraction of Earth's surface, freshwater wetlands are the largest natural source of methane emitted into the atmosphere. New research identifies an unexpected process that acts as a key gatekeeper in regulating methane emissions from these freshwater environments.
The study results are published this week in the journal Nature Communications by biologist Samantha Joye of the University of Georgia and colleagues.
The researchers report that high rates of anaerobic (no oxygen) methane oxidation in freshwater wetlands substantially reduce atmospheric emissions of methane.
New attention
The process of anaerobic methane oxidation was once considered insignificant in freshwater wetlands, but scientists now think very differently about its importance.
"Some microorganisms actually eat methane, and recent decades have seen an explosion in our understanding of the way they do this," says Matt Kane, program director in the National Science Foundation's Division of Environmental Biology, which funded the research. "These researchers demonstrate that if it were not for an unusual group of methane-eating microbes that live in freshwater wetlands, far more methane would be released into the atmosphere."
Although anaerobic methane oxidation in freshwater has been gathering scientific attention, the environmental relevance of this process was unknown until recently, Joye says.
"This paper reports a previously unrecognized sink for methane in freshwater sediments, soils and peats: microbially-mediated anaerobic oxidation of methane," she says. "The fundamental importance of this process in freshwater wetlands underscores the critical role that anaerobic oxidation of methane plays on Earth, even in freshwater habitats."
Without this process, Joye says, methane emissions from freshwater wetlands could be 30 to 50 percent greater.
Comparison of wetlands
The researchers investigated the anaerobic oxidation process in freshwater wetlands in three regions: the freshwater peat soils of the Florida Everglades; a coastal organic-rich wetland in Acadia National Park, Maine; and a tidal freshwater wetland in coastal Georgia.
All three sites were sampled over multiple seasons.
The anaerobic oxidation of methane was coupled to some extent with sulfate reduction. Rising sea levels, for example, would result in increased sulfate, which could fuel greater rates of anaerobic oxidation.
Similarly, with saltwater intrusion into coastal freshwater wetlands, increasing sulfate inhibits microbial methane formation, or methanogenesis.
So while freshwater wetlands are known to be significant methane sources, their low sulfate concentrations previously led most researchers to conclude that anaerobic oxidation of methane was not important in these regions.
Crucial process
The new findings show that if not for the anaerobic methane oxidation process, freshwater environments would account for an even greater portion of the global methane budget.
"The process of anaerobic oxidation of methane in freshwater wetlands appears to be different than what we know about this process in marine sediments," Joye says. "There could be unique biochemistry at work."
Adds Katherine Segarra, an oceanographer at the U.S. Department of the Interior's Bureau of Ocean Energy Management and co-author of the paper: "This study furthers the understanding of the global methane budget, and may have ramifications for the development of future greenhouse gas models."
Additional financial support for the research was provided by the Deutsche Forschungsgemeinschaft via the Research Center/Cluster of Excellence at the MARUM Center for Marine Environmental Sciences and department of geosciences at the University of Bremen, Germany.
-- Cheryl Dybas
-- Alan Flurry, University of Georgia
Investigators
Samantha Joye
Christof Meile
Vladimir Samarkin
Related Institutions/Organizations
University of Georgia Research Foundation Inc
Wednesday, June 24, 2015
THE MYSTERIOUS LIGHTS OF PLANET CERES
FROM: NASA
 |
| A cluster of mysterious bright spots on dwarf planet Ceres can be seen in this image, taken by NASA's Dawn spacecraft from an altitude of 2,700 miles (4,400 kilometers). The image, with a resolution of 1,400 feet (410 meters) per pixel, was taken on June 9, 2015. Image Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA. |
THE WASPS AND THE BRAINS
FROM: NATIONAL SCIENCE FOUNDATION
Tiny brains, but shared smarts
Unlike humans and other vertebrates, the brains of wasps shrink when they're socialized--but they might 'share' brainpower
A solitary wasp--the kind that lives and forages for food alone--has a fairly small brain. Type out a lowercase letter in 10-point text and you'll get an idea of its size.
But tiny as that brain is, its social cousins, living together in honeycombed nests, have even smaller ones. And that size difference might provide some key information about the difference between insect societies and vertebrate societies.
Biologists have studied the societies of vertebrates--from flocks of birds, to schools of fish, to communities of humans--enough to come up with something called the "social brain hypothesis." Generally, it goes something like this: Social interaction presents challenges that require a lot of brain power, as that interaction requires organisms to navigate complicated territory, including avoiding conflict and building alliances.
Therefore, vertebrates that live in societies have bigger brains. The more complex the organism's society, the bigger its brain regions for processing complex information will be. Scientists believe the complexity of human societies may be one of the reasons we have such large, developed brains.
Sean O'Donnell, a biology professor at Drexel, has spent almost the entirety of his more than 20-year career studying wasps. He says these picnic terrors--actually critical members of the insect world that prey on pest species--represent ideal candidates for seeing whether that hypothesis applies to insects, because they have so much variation.
Some wasps are solitary. Some live in small, primitive groups. Others live in larger, more complex societies. "There are lots of intermediate stages," O'Donnell said.
When O'Donnell, with support from the National Science Foundation's Directorate for Biological Sciences, looked at the brains in 29 related species of wasps spanning the social spectrum, he found that living in a society did indeed affect the size of their brains. It just made them smaller, instead of bigger.
His findings are described in the latest issue of Proceedings of the Royal Society B.
"If our data is verified, it suggests that there's something really different about how insect societies formed," he said.
O'Donnell's work focused on the "mushroom bodies" of the wasps' brains, structures that are superficially similar to the regions of vertebrate brains that deal with higher cognitive functions.
His research uncovered another interesting difference from vertebrates: the complexity of the wasps' societies seemed to have no significant effect on the size of their brains. The big dropoff in size occurred between solitary and social wasps. In contrast, the brains of wasps in simple societies showed no significant size differences between those in complex societies.
"That suggests to me that going from solitary to a small society is the significant transition," O'Donnell said.
'Sharing' brainpower
Part of what makes vertebrate societies so brain-intensive is that they usually involve groups of organisms with different agendas that aren't related to one another--most of the people you know aren't members of your family.
Insect societies, however, are made up of groups of cooperating close relatives with shared objectives. Wasps might not need the type of brainpower required for social interaction because there's much less of it in their nests and colonies. The insects cooperate and rely on each other without the type of negotiation that can be required in vertebrate societies.
But what advantage could a smaller, less complex brain offer a species? As O'Donnell puts it, "Brains are expensive."
Neural tissues require more energy to develop and maintain than almost any other kind, and biologists have found that natural selection will find the optimal balance between the metabolic costs of developing particular areas of the brain and the benefits yielded.
In some ways, the social wasps may "share" brainpower. Individually, their brains might not stack up to their solitary relatives, but the colony as a whole is "smart."
O'Donnell says the next steps for his work will replicate the wasp research with termites and bees, which also offer a variety of social complexity.
"We would expect to see similar patterns," he said.
Learn more in this Drexel University video on Sean O'Donnell's work.
-- Rob Margetta
Investigators
Sean O'Donnell
Related Institutions/Organizations
Drexel University
Tiny brains, but shared smarts
Unlike humans and other vertebrates, the brains of wasps shrink when they're socialized--but they might 'share' brainpower
A solitary wasp--the kind that lives and forages for food alone--has a fairly small brain. Type out a lowercase letter in 10-point text and you'll get an idea of its size.
But tiny as that brain is, its social cousins, living together in honeycombed nests, have even smaller ones. And that size difference might provide some key information about the difference between insect societies and vertebrate societies.
Biologists have studied the societies of vertebrates--from flocks of birds, to schools of fish, to communities of humans--enough to come up with something called the "social brain hypothesis." Generally, it goes something like this: Social interaction presents challenges that require a lot of brain power, as that interaction requires organisms to navigate complicated territory, including avoiding conflict and building alliances.
Therefore, vertebrates that live in societies have bigger brains. The more complex the organism's society, the bigger its brain regions for processing complex information will be. Scientists believe the complexity of human societies may be one of the reasons we have such large, developed brains.
Sean O'Donnell, a biology professor at Drexel, has spent almost the entirety of his more than 20-year career studying wasps. He says these picnic terrors--actually critical members of the insect world that prey on pest species--represent ideal candidates for seeing whether that hypothesis applies to insects, because they have so much variation.
Some wasps are solitary. Some live in small, primitive groups. Others live in larger, more complex societies. "There are lots of intermediate stages," O'Donnell said.
When O'Donnell, with support from the National Science Foundation's Directorate for Biological Sciences, looked at the brains in 29 related species of wasps spanning the social spectrum, he found that living in a society did indeed affect the size of their brains. It just made them smaller, instead of bigger.
His findings are described in the latest issue of Proceedings of the Royal Society B.
"If our data is verified, it suggests that there's something really different about how insect societies formed," he said.
O'Donnell's work focused on the "mushroom bodies" of the wasps' brains, structures that are superficially similar to the regions of vertebrate brains that deal with higher cognitive functions.
His research uncovered another interesting difference from vertebrates: the complexity of the wasps' societies seemed to have no significant effect on the size of their brains. The big dropoff in size occurred between solitary and social wasps. In contrast, the brains of wasps in simple societies showed no significant size differences between those in complex societies.
"That suggests to me that going from solitary to a small society is the significant transition," O'Donnell said.
'Sharing' brainpower
Part of what makes vertebrate societies so brain-intensive is that they usually involve groups of organisms with different agendas that aren't related to one another--most of the people you know aren't members of your family.
Insect societies, however, are made up of groups of cooperating close relatives with shared objectives. Wasps might not need the type of brainpower required for social interaction because there's much less of it in their nests and colonies. The insects cooperate and rely on each other without the type of negotiation that can be required in vertebrate societies.
But what advantage could a smaller, less complex brain offer a species? As O'Donnell puts it, "Brains are expensive."
Neural tissues require more energy to develop and maintain than almost any other kind, and biologists have found that natural selection will find the optimal balance between the metabolic costs of developing particular areas of the brain and the benefits yielded.
In some ways, the social wasps may "share" brainpower. Individually, their brains might not stack up to their solitary relatives, but the colony as a whole is "smart."
O'Donnell says the next steps for his work will replicate the wasp research with termites and bees, which also offer a variety of social complexity.
"We would expect to see similar patterns," he said.
Learn more in this Drexel University video on Sean O'Donnell's work.
-- Rob Margetta
Investigators
Sean O'Donnell
Related Institutions/Organizations
Drexel University
Sunday, June 21, 2015
RESEARCH TO SAVE HONEYBEES IN THE U.S.
FROM: U.S. NATIONAL SCIENCE FOUNDATION
Protecting the honey-bearers
Ancestors of American honey bees shed light on pollinator health
The honey bearers arrived in the early 17th century, carried into the United States by early European settlers. Apis mellifera--the name truly translates as bee honey-bearer, though they are better known as honey bees.
Over the ensuing centuries, they flourished in the temperate North American climate, so successful they've become an integral part of our agricultural economy, contributing more than $14 billion in pollination services each year. They're trucked to our apple orchards and blueberry farms, our fields of squash and watermelon.
During the last decade, however, the honey bearers have suffered. They've died off in alarming numbers, entire colonies collapsing into ruin. The culprit seems to be a complex quartet of factors--poor nutrition, parasites, pathogens and pesticides--and scientists are still uncovering how these stresses harm bees and how they can be prevented.
Could the answers to some of these questions lie in Apis mellifera's African ancestors?
"If we can understand the genetic and physiological mechanisms that allow African bees to withstand parasites and viruses, we can use this information for breeding programs or management practices in U.S. bee populations," says Christina Grozinger, director of the Center for Pollinator Research at Pennsylvania State University.
Grozinger was part of a National Science Foundation (NSF)-funded project researching East African honeybees, analyzing the health of bee populations at 24 sites across Kenya. The team included scientists from Penn State, the International Centre of Insect Physiology and Ecology (icipe) in Kenya and South Eastern Kenyan University.
NSF's Basic Research to Enable Agricultural Development, or BREAD, program funded the award. BREAD supports creative, fundamental research designed to help small-holder farms in the developing world. The program is a collaboration between NSF and the Bill & Melinda Gates Foundation.
"The BREAD partnership has allowed NSF to build and fully support international collaborations, as well as innovative proof-of-concept basic research with broad implications for global agriculture," says Jane Silverthorne, deputy assistant director of NSF's Biological Sciences Directorate, which funded the research. "This study continues to provide unique insights into how environmental conditions affect the health of honey bee colonies in Kenya."
In 2010, the team of researchers from icipe and Penn State first discovered the deadly Varroa mite in Kenyan bees. A tiny red beast that attaches, shield-like, to the back of a bee, Varroa feeds on hemolymph (bee blood). It transmits diseases and wreaks havoc with a bee's immune system. The parasite's full name--Varroa destructor--is apt; it is the culprit for thousands upon thousands of bee deaths in North America and Europe.
That research was the first time Varroa was documented in East Africa.
"Since Varroa is the most deadly parasite of honey bees and has decimated populations of honey bees wherever it has spread in the world, it was vital to track the effects of the introduction of Varroa on East African bee populations," Grozinger said.
So the team applied for the BREAD award and began analyzing honey bees across Kenya, studying how parasites, pathogens and viruses were affecting the African bees.
What they found was that--despite Varroa--the African bees were surviving, were tolerating the parasites. The bees did not seem to be actively fighting or removing the mites; instead, they had a higher tolerance for them. Researchers also discovered a link between elevation and Varroa: Bee colonies at higher elevations had higher instances of Varroa. This suggests a bee's environment may make it more or less susceptible to the mites. And since environment is also closely related to nutrition--higher elevations often have less flowering plants, which means less food options for honey bees--improving bee nutrition could be one way to combat Varroa.
The relationship between elevation, nutrition and pathogens needs to be examined further, but Grozinger calls it a "very intriguing" correlation. Increasing the diversity of flowering plant species in a landscape--one way to boost bee nutrition--could potentially help bees help themselves, by increasing a bee's natural ability to tolerate Varroa.
The research, published last year in PLOS One, is just a "first blush" at analyzing African bee populations, said Maryann Frazier, a senior extension associate at Penn State and another scientist on the project.
But she says it's important to study honey bees in other parts of the world, and not just because pollinators are a global resource (in Kenya, honey bees not only pollinate, but provide crucial income and nutrition for farmers and rural families).
"What we're really interested in are the mechanisms that allow them to be more resistant. And then we can use that knowledge to select for those behaviors and physiological traits."
Much about those mechanisms remains undiscovered. Frazier, Grozinger, their Kenyan counterparts and others from Penn State are sequencing whole genomes of individual bees collected from different parts of Kenya; this should allow them to identify specific genes that have helped the bees adapt to different environments and potentially resist different diseases. They're also analyzing whether different hive types--many Kenyan beekeepers use hollow logs or trees as hives--affect honey bee health and productivity.
Other NSF-funded honey bee projects are studying the role of gut microbes in bee health, how bees develop colony-level social immunity and much more: the foundation supports more than 250 current pollinator-related projects, many highlighted in the recent Pollinator Research Action Plan, a national strategy to better understand pollinator losses and improve pollinator health. And ensure the honey-bearers thrive for many years to come.
-- Jessica Arriens
Investigators
Harland Patch
James Frazier
James Tumlinson
Maryann Frazier
Christina Grozinger
Protecting the honey-bearers
Ancestors of American honey bees shed light on pollinator health
The honey bearers arrived in the early 17th century, carried into the United States by early European settlers. Apis mellifera--the name truly translates as bee honey-bearer, though they are better known as honey bees.
Over the ensuing centuries, they flourished in the temperate North American climate, so successful they've become an integral part of our agricultural economy, contributing more than $14 billion in pollination services each year. They're trucked to our apple orchards and blueberry farms, our fields of squash and watermelon.
During the last decade, however, the honey bearers have suffered. They've died off in alarming numbers, entire colonies collapsing into ruin. The culprit seems to be a complex quartet of factors--poor nutrition, parasites, pathogens and pesticides--and scientists are still uncovering how these stresses harm bees and how they can be prevented.
Could the answers to some of these questions lie in Apis mellifera's African ancestors?
"If we can understand the genetic and physiological mechanisms that allow African bees to withstand parasites and viruses, we can use this information for breeding programs or management practices in U.S. bee populations," says Christina Grozinger, director of the Center for Pollinator Research at Pennsylvania State University.
Grozinger was part of a National Science Foundation (NSF)-funded project researching East African honeybees, analyzing the health of bee populations at 24 sites across Kenya. The team included scientists from Penn State, the International Centre of Insect Physiology and Ecology (icipe) in Kenya and South Eastern Kenyan University.
NSF's Basic Research to Enable Agricultural Development, or BREAD, program funded the award. BREAD supports creative, fundamental research designed to help small-holder farms in the developing world. The program is a collaboration between NSF and the Bill & Melinda Gates Foundation.
"The BREAD partnership has allowed NSF to build and fully support international collaborations, as well as innovative proof-of-concept basic research with broad implications for global agriculture," says Jane Silverthorne, deputy assistant director of NSF's Biological Sciences Directorate, which funded the research. "This study continues to provide unique insights into how environmental conditions affect the health of honey bee colonies in Kenya."
In 2010, the team of researchers from icipe and Penn State first discovered the deadly Varroa mite in Kenyan bees. A tiny red beast that attaches, shield-like, to the back of a bee, Varroa feeds on hemolymph (bee blood). It transmits diseases and wreaks havoc with a bee's immune system. The parasite's full name--Varroa destructor--is apt; it is the culprit for thousands upon thousands of bee deaths in North America and Europe.
That research was the first time Varroa was documented in East Africa.
"Since Varroa is the most deadly parasite of honey bees and has decimated populations of honey bees wherever it has spread in the world, it was vital to track the effects of the introduction of Varroa on East African bee populations," Grozinger said.
So the team applied for the BREAD award and began analyzing honey bees across Kenya, studying how parasites, pathogens and viruses were affecting the African bees.
What they found was that--despite Varroa--the African bees were surviving, were tolerating the parasites. The bees did not seem to be actively fighting or removing the mites; instead, they had a higher tolerance for them. Researchers also discovered a link between elevation and Varroa: Bee colonies at higher elevations had higher instances of Varroa. This suggests a bee's environment may make it more or less susceptible to the mites. And since environment is also closely related to nutrition--higher elevations often have less flowering plants, which means less food options for honey bees--improving bee nutrition could be one way to combat Varroa.
The relationship between elevation, nutrition and pathogens needs to be examined further, but Grozinger calls it a "very intriguing" correlation. Increasing the diversity of flowering plant species in a landscape--one way to boost bee nutrition--could potentially help bees help themselves, by increasing a bee's natural ability to tolerate Varroa.
The research, published last year in PLOS One, is just a "first blush" at analyzing African bee populations, said Maryann Frazier, a senior extension associate at Penn State and another scientist on the project.
But she says it's important to study honey bees in other parts of the world, and not just because pollinators are a global resource (in Kenya, honey bees not only pollinate, but provide crucial income and nutrition for farmers and rural families).
"What we're really interested in are the mechanisms that allow them to be more resistant. And then we can use that knowledge to select for those behaviors and physiological traits."
Much about those mechanisms remains undiscovered. Frazier, Grozinger, their Kenyan counterparts and others from Penn State are sequencing whole genomes of individual bees collected from different parts of Kenya; this should allow them to identify specific genes that have helped the bees adapt to different environments and potentially resist different diseases. They're also analyzing whether different hive types--many Kenyan beekeepers use hollow logs or trees as hives--affect honey bee health and productivity.
Other NSF-funded honey bee projects are studying the role of gut microbes in bee health, how bees develop colony-level social immunity and much more: the foundation supports more than 250 current pollinator-related projects, many highlighted in the recent Pollinator Research Action Plan, a national strategy to better understand pollinator losses and improve pollinator health. And ensure the honey-bearers thrive for many years to come.
-- Jessica Arriens
Investigators
Harland Patch
James Frazier
James Tumlinson
Maryann Frazier
Christina Grozinger
Saturday, June 20, 2015
CDC SAYS EARLY TREATMENT OF ROCKY MOUNTAIN SPOTTED FEVER MAY SAVE MILLIONS, PREVENT PREMATURE DEATH AND DISABILITY
FROM: U.S. CENTERS FOR DISEASE CONTROL AND PREVENTION
Prevention and early treatment of RMSF in Arizona may save millions by preventing premature death and disability
Several Arizona American Indian communities severely impacted by outbreak, CDC/IHS study finds
The mounting costs of an epidemic of Rocky Mountain spotted fever (RMSF) among several American Indian tribes in Arizona suggests that prevention and control efforts would be cost effective. A recent study released by experts at the Centers for Disease Control and Prevention (CDC) and the Indian Health Service (IHS), in partnership with Arizona tribes, describes an estimated $13.2 million in losses linked to the epidemic of RMSF between 2002 and 2011, on two Indian reservations. Cost estimates include medical costs, time off work, and loss of lifetime productivity due to early death. These values underestimate the actual cost of the epidemic because long-term losses from disability and expensive medical procedures are not included. Preventing tick bites is the most important step in preventing severe illness and death from RMSF. CDC, IHS, state, and tribal governments are working together to develop effective prevention programs to gain control of this devastating epidemic.
“Rocky Mountain Spotted Fever is completely preventable,” said Naomi Drexler, CDC epidemiologist and one of the study’s authors. “State, federal and tribal health authorities have been working together since the start of the epidemic to build effective community-based tick control programs, and these efforts have produced remarkable reductions in human cases. These programs are costly, but medical expenses and lives lost cost four times more than RMSF prevention efforts. Increasing access to these prevention efforts is critical to save lives and protect communities.”
Published in The American Journal of Tropical Medicine and Hygiene, the study reviewed 205 medical records from two American Indian communities at the center of the epidemic. Over 80 percent of RMSF cases required emergency room visits, 14 percent were admitted to the intensive care unit for severe illness, and 7 percent were fatal. The average cost per death from RMSF ($775,467) is more than five times that of pneumococcal disease ($140,862) in the United States. More than half of RMSF deaths were among children, raising the long-term social costs of the epidemic.
RMSF is a severe disease caused by the bacterium Rickettsia rickettsii and spread through the bite of an infected tick. RMSF begins with non-specific symptoms such as fever and headache, vomiting, diarrhea, and sometimes rash. Severely ill patients may require amputation of fingers, toes or limbs due to blood loss; heart and lung specialty care; and management in intensive care units. More than 20 percent of untreated cases are fatal; the average time from the beginning of symptoms to death is only eight days.
Prevention and early treatment of RMSF in Arizona may save millions by preventing premature death and disability
Several Arizona American Indian communities severely impacted by outbreak, CDC/IHS study finds
The mounting costs of an epidemic of Rocky Mountain spotted fever (RMSF) among several American Indian tribes in Arizona suggests that prevention and control efforts would be cost effective. A recent study released by experts at the Centers for Disease Control and Prevention (CDC) and the Indian Health Service (IHS), in partnership with Arizona tribes, describes an estimated $13.2 million in losses linked to the epidemic of RMSF between 2002 and 2011, on two Indian reservations. Cost estimates include medical costs, time off work, and loss of lifetime productivity due to early death. These values underestimate the actual cost of the epidemic because long-term losses from disability and expensive medical procedures are not included. Preventing tick bites is the most important step in preventing severe illness and death from RMSF. CDC, IHS, state, and tribal governments are working together to develop effective prevention programs to gain control of this devastating epidemic.
“Rocky Mountain Spotted Fever is completely preventable,” said Naomi Drexler, CDC epidemiologist and one of the study’s authors. “State, federal and tribal health authorities have been working together since the start of the epidemic to build effective community-based tick control programs, and these efforts have produced remarkable reductions in human cases. These programs are costly, but medical expenses and lives lost cost four times more than RMSF prevention efforts. Increasing access to these prevention efforts is critical to save lives and protect communities.”
Published in The American Journal of Tropical Medicine and Hygiene, the study reviewed 205 medical records from two American Indian communities at the center of the epidemic. Over 80 percent of RMSF cases required emergency room visits, 14 percent were admitted to the intensive care unit for severe illness, and 7 percent were fatal. The average cost per death from RMSF ($775,467) is more than five times that of pneumococcal disease ($140,862) in the United States. More than half of RMSF deaths were among children, raising the long-term social costs of the epidemic.
RMSF is a severe disease caused by the bacterium Rickettsia rickettsii and spread through the bite of an infected tick. RMSF begins with non-specific symptoms such as fever and headache, vomiting, diarrhea, and sometimes rash. Severely ill patients may require amputation of fingers, toes or limbs due to blood loss; heart and lung specialty care; and management in intensive care units. More than 20 percent of untreated cases are fatal; the average time from the beginning of symptoms to death is only eight days.
Thursday, June 18, 2015
CO2, BIG DINOSAURS AND THE EQUATOR
FROM: NATIONAL SCIENCE FOUNDATION
Big dinosaurs steered clear of the tropics
Climate swings lasting millions of years too much for dinos
For more than 30 million years after dinosaurs first appeared, they remained inexplicably rare near the equator, where only a few small-bodied meat-eating dinosaurs made a living.
The long absence at low latitudes has been one of the great, unanswered questions about the rise of the dinosaurs.
Now the mystery has a solution, according to scientists who pieced together a detailed picture of the climate and ecology more than 200 million years ago at Ghost Ranch in northern New Mexico, a site rich with fossils.
The findings, reported today in the journal Proceedings of the National Academy of Sciences (PNAS), show that the tropical climate swung wildly with extremes of drought and intense heat.
Wildfires swept the landscape during arid regimes and reshaped the vegetation available for plant-eating animals.
"Our data suggest it was not a fun place," says scientist Randall Irmis of the University of Utah.
"It was a time of climate extremes that went back and forth unpredictably. Large, warm-blooded dinosaurian herbivores weren't able to exist close to the equator--there was not enough dependable plant food."
The study, led by geochemist Jessica Whiteside, now of the University of Southampton, is the first to provide a detailed look at climate and ecology during the emergence of the dinosaurs.
Atmospheric carbon dioxide levels then were four to six times current levels. "If we continue along our present course, similar conditions in a high-CO2 world may develop, and suppress low-latitude ecosystems," Irmis says.
"These scientists have developed a new explanation for the perplexing near-absence of dinosaurs in late Triassic [the Triassic was between 252 million and 201 million years ago] equatorial settings," says Rich Lane, program director in the National Science Foundation's (NSF) Division of Earth Sciences, which funded the research.
"That includes rapid vegetation changes related to climate fluctuations between arid and moist climates and the resulting extensive wildfires of the time."
Reconstructing the deep past
The earliest known dinosaur fossils, found in Argentina, date from around 230 million years ago.
Within 15 million years, species with different diets and body sizes had evolved and were abundant except in tropical latitudes. There the only dinosaurs were small carnivores. The pattern persisted for 30 million years after the first dinosaurs appeared.
The scientists focused on Chinle Formation rocks, which were deposited by rivers and streams between 205 and 215 million years ago at Ghost Ranch (perhaps better known as the place where artist Georgia O'Keeffe lived and painted for much of her career).
The multi-colored rocks of the Chinle Formation are a common sight on the Colorado Plateau at places such as the Painted Desert at Petrified Forest National Park in Arizona.
In ancient times, North America and other land masses were bound together in the supercontinent Pangea. The Ghost Ranch site stood close to the equator, at roughly the same latitude as present-day southern India.
The researchers reconstructed the deep past by analyzing several kinds of data: from fossils, charcoal left by ancient wildfires, stable isotopes from organic matter, and carbonate nodules that formed in ancient soils.
Fossilized bones, pollen grains and fern spores revealed the types of animals and plants living at different times, marked by layers of sediment.
Dinosaurs remained rare among the fossils, accounting for less than 15 percent of vertebrate animal remains.
They were outnumbered in diversity, abundance and body size by reptiles known as pseudosuchian archosaurs, the lineage that gave rise to crocodiles and alligators.
The sparse dinosaurs consisted mostly of small, carnivorous theropods.
Big, long-necked dinosaurs, or sauropodomorphs--already the dominant plant-eaters at higher latitudes--did not exist at the study site nor any other low-latitude site in the Pangaea of that time, as far as the fossil record shows.
Abrupt changes in climate left a record in the abundance of different types of pollen and fern spores between sediment layers.
Fossilized organic matter from decaying plants provided another window on climate shifts. Changes in the ratio of stable isotopes of carbon in the organic matter bookmarked times when plant productivity declined during extended droughts.
Drought and fire
Wildfire temperatures varied drastically, the researchers found, consistent with a fluctuating environment in which the amount of combustible plant matter rose and fell over time.
The researchers estimated the intensity of wildfires using bits of charcoal recovered in sediment layers.
The overall picture is that of a climate punctuated by extreme shifts in precipitation and in which plant die-offs fueled hotter fires. That in turn killed more plants, damaged soils and increased erosion.
Atmospheric carbon dioxide levels, calculated from stable isotope analyses of soil carbonate and preserved organic matter, rose from about 1,200 parts per million (ppm) at the base of the section, to about 2,400 ppm near the top.
At these high CO2 concentrations, climate models predict more frequent and more extreme weather fluctuations consistent with the fossil and charcoal evidence.
Continuing shifts between extremes of dry and wet likely prevented the establishment of the dinosaur-dominated communities found in the fossil record at higher latitudes across South America, Europe, and southern Africa, where aridity and temperatures were less extreme and humidity was consistently higher.
Resource-limited conditions could not support a diverse community of fast-growing, warm-blooded, large dinosaurs, which require a productive and stable environment to thrive.
"The conditions would have been something similar to the arid western United States today, although there would have been trees and smaller plants near streams and rivers, and forests during humid times," says Whiteside.
"The fluctuating and harsh climate with widespread wildfires meant that only small two-legged carnivorous dinosaurs could survive."
-NSF-
Media Contacts
Cheryl Dybas, NSF
Big dinosaurs steered clear of the tropics
Climate swings lasting millions of years too much for dinos
For more than 30 million years after dinosaurs first appeared, they remained inexplicably rare near the equator, where only a few small-bodied meat-eating dinosaurs made a living.
The long absence at low latitudes has been one of the great, unanswered questions about the rise of the dinosaurs.
Now the mystery has a solution, according to scientists who pieced together a detailed picture of the climate and ecology more than 200 million years ago at Ghost Ranch in northern New Mexico, a site rich with fossils.
The findings, reported today in the journal Proceedings of the National Academy of Sciences (PNAS), show that the tropical climate swung wildly with extremes of drought and intense heat.
Wildfires swept the landscape during arid regimes and reshaped the vegetation available for plant-eating animals.
"Our data suggest it was not a fun place," says scientist Randall Irmis of the University of Utah.
"It was a time of climate extremes that went back and forth unpredictably. Large, warm-blooded dinosaurian herbivores weren't able to exist close to the equator--there was not enough dependable plant food."
The study, led by geochemist Jessica Whiteside, now of the University of Southampton, is the first to provide a detailed look at climate and ecology during the emergence of the dinosaurs.
Atmospheric carbon dioxide levels then were four to six times current levels. "If we continue along our present course, similar conditions in a high-CO2 world may develop, and suppress low-latitude ecosystems," Irmis says.
"These scientists have developed a new explanation for the perplexing near-absence of dinosaurs in late Triassic [the Triassic was between 252 million and 201 million years ago] equatorial settings," says Rich Lane, program director in the National Science Foundation's (NSF) Division of Earth Sciences, which funded the research.
"That includes rapid vegetation changes related to climate fluctuations between arid and moist climates and the resulting extensive wildfires of the time."
Reconstructing the deep past
The earliest known dinosaur fossils, found in Argentina, date from around 230 million years ago.
Within 15 million years, species with different diets and body sizes had evolved and were abundant except in tropical latitudes. There the only dinosaurs were small carnivores. The pattern persisted for 30 million years after the first dinosaurs appeared.
The scientists focused on Chinle Formation rocks, which were deposited by rivers and streams between 205 and 215 million years ago at Ghost Ranch (perhaps better known as the place where artist Georgia O'Keeffe lived and painted for much of her career).
The multi-colored rocks of the Chinle Formation are a common sight on the Colorado Plateau at places such as the Painted Desert at Petrified Forest National Park in Arizona.
In ancient times, North America and other land masses were bound together in the supercontinent Pangea. The Ghost Ranch site stood close to the equator, at roughly the same latitude as present-day southern India.
The researchers reconstructed the deep past by analyzing several kinds of data: from fossils, charcoal left by ancient wildfires, stable isotopes from organic matter, and carbonate nodules that formed in ancient soils.
Fossilized bones, pollen grains and fern spores revealed the types of animals and plants living at different times, marked by layers of sediment.
Dinosaurs remained rare among the fossils, accounting for less than 15 percent of vertebrate animal remains.
They were outnumbered in diversity, abundance and body size by reptiles known as pseudosuchian archosaurs, the lineage that gave rise to crocodiles and alligators.
The sparse dinosaurs consisted mostly of small, carnivorous theropods.
Big, long-necked dinosaurs, or sauropodomorphs--already the dominant plant-eaters at higher latitudes--did not exist at the study site nor any other low-latitude site in the Pangaea of that time, as far as the fossil record shows.
Abrupt changes in climate left a record in the abundance of different types of pollen and fern spores between sediment layers.
Fossilized organic matter from decaying plants provided another window on climate shifts. Changes in the ratio of stable isotopes of carbon in the organic matter bookmarked times when plant productivity declined during extended droughts.
Drought and fire
Wildfire temperatures varied drastically, the researchers found, consistent with a fluctuating environment in which the amount of combustible plant matter rose and fell over time.
The researchers estimated the intensity of wildfires using bits of charcoal recovered in sediment layers.
The overall picture is that of a climate punctuated by extreme shifts in precipitation and in which plant die-offs fueled hotter fires. That in turn killed more plants, damaged soils and increased erosion.
Atmospheric carbon dioxide levels, calculated from stable isotope analyses of soil carbonate and preserved organic matter, rose from about 1,200 parts per million (ppm) at the base of the section, to about 2,400 ppm near the top.
At these high CO2 concentrations, climate models predict more frequent and more extreme weather fluctuations consistent with the fossil and charcoal evidence.
Continuing shifts between extremes of dry and wet likely prevented the establishment of the dinosaur-dominated communities found in the fossil record at higher latitudes across South America, Europe, and southern Africa, where aridity and temperatures were less extreme and humidity was consistently higher.
Resource-limited conditions could not support a diverse community of fast-growing, warm-blooded, large dinosaurs, which require a productive and stable environment to thrive.
"The conditions would have been something similar to the arid western United States today, although there would have been trees and smaller plants near streams and rivers, and forests during humid times," says Whiteside.
"The fluctuating and harsh climate with widespread wildfires meant that only small two-legged carnivorous dinosaurs could survive."
-NSF-
Media Contacts
Cheryl Dybas, NSF
Friday, June 12, 2015
VA SAYS STUDY COULD FIND VETERANS WITH HIGH-RISK OF SUICIDE
FROM: U.S. DEPARTMENT OF VETERANS AFFAIRS
Study may help Department of Veterans Affairs find patients with high-risk of suicide
June 11, 2015, 04:04:00 PM
Study May Help Department of Veterans Affairs Find Patients With High-Risk of Suicide
Clinicians are challenged every day to make difficult decisions regarding patients’ suicide risk. Using Veterans Health Administration (VHA) health system electronic medical record data, Veterans Affairs (VA) and National Institute of Mental Health (NIMH) scientists were able to identify very small groups of individuals within the VHA’s patient population with very high, predicted suicide risk -- most of whom had not been identified for suicide risk by clinicians. Such methods can help the VHA to target suicide prevention efforts for patients at high risk, and may have more wide-ranging benefits.
John McCarthy, Ph.D., M.P.H, director of the Serious Mental Illness Treatment Resource and Evaluation Center in the VA Office of Mental Health Operations, Robert Bossarte, Ph.D., director of epidemiology in the VA Office of Public Health, Ira Katz, M.D., senior consultant for mental health program analysis in the VA Office of Mental Health Operations, and colleagues report their findings today in the online issue of American Journal of Public Health. This paper is the result of a collaboration between the VA and NIMH, which is part of the National Institutes of Health.
Dr. McCarthy and colleagues developed their suicide-risk algorithm by studying the VHA patient population from fiscal years 2009-2011. Data on manner of death came from the National Death Index, and predictors of suicide and other types of death came from VHA clinical records. Dividing randomly the patient population in half, the team used data from one half to develop the predictive model, and then tested the model using data from the other half. Each of the two study samples included 3,180 suicide cases and 1,056,004 control patients. Researchers compared predicted suicide risk to actual mortality to assess the performance of the predictive model.
“As the largest health care provider in the U.S., VA has the responsibility to continuously examine how our extensive suicide prevention efforts are working, and to identify critical opportunities for improvement in service to our nation’s Veterans,” said Dr. Caitlin Thompson, Deputy Director for Suicide Prevention for VA. “This collaborative effort with NIMH provides us with unprecedented information that will allow us to design and implement innovative strategies on how to assess and care for those Veterans who may be at high risk for suicide. This model will advance the care provided to Veterans through VA’s suicide prevention programs to allow us to better tailor our suicide prevention efforts so that we can ensure that ALL Veterans remain safe.”
The VHA care system identifies patients as being at high-risk of suicide based on information assessed during clinical encounters. Researchers found that their predictive model was more sensitive than this clinical flagging, in the sense that, even in groups with the highest predicted suicide risk based on the model, less than one-third of patients had been identified clinically.
“This is valuable, because it gives the VA more extensive information about suicide risk,” said Michael Schoenbaum, Ph.D., senior advisor for mental health service, epidemiology and economics at NIMH and one of the co-authors of the report. “If the VA can identify small groups of people with a particularly high-risk of suicide, then they can target enhanced prevention and treatment services to these highest-risk individuals,”
“It’s particularly encouraging that these analyses use the types of data available to any large health care system,” said NIMH Director Thomas Insel, M.D. “ These methods could help us prevent civilian as well as veteran suicides.”
In addition to identifying suicide risk, the team looked at deaths among people identified as highest risk for suicide in 2010. The team found that this group had both very high suicide and non-suicide death rates over the next 12 months.
“This finding reinforces the idea that using this process to target suicide risk interventions may have wide benefits across an extended span of time,” concluded Dr. Schoenbaum.
Reference:
McCarthy J.F., et al., Predictive Modeling and Concentration of the Risk of Suicide: Implications for Preventive Interventions in the US Department of Veterans Affairs. American Journal of Public Health (in press)
About the National Institute of Mental Health (NIMH): The mission of the NIMH is to transform the understanding and treatment of mental illnesses through basic and clinical research, paving the way for prevention, recovery and cure.
About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases.
About the Department of Veterans Affairs: The VA is the second largest Federal department with close to 300,000 employees. The Department's mission is to serve America's veterans and their families with dignity and compassion and to be their principal advocate in ensuring that they receive the care, support and recognition earned in service to this Nation.
Study may help Department of Veterans Affairs find patients with high-risk of suicide
June 11, 2015, 04:04:00 PM
Study May Help Department of Veterans Affairs Find Patients With High-Risk of Suicide
Clinicians are challenged every day to make difficult decisions regarding patients’ suicide risk. Using Veterans Health Administration (VHA) health system electronic medical record data, Veterans Affairs (VA) and National Institute of Mental Health (NIMH) scientists were able to identify very small groups of individuals within the VHA’s patient population with very high, predicted suicide risk -- most of whom had not been identified for suicide risk by clinicians. Such methods can help the VHA to target suicide prevention efforts for patients at high risk, and may have more wide-ranging benefits.
John McCarthy, Ph.D., M.P.H, director of the Serious Mental Illness Treatment Resource and Evaluation Center in the VA Office of Mental Health Operations, Robert Bossarte, Ph.D., director of epidemiology in the VA Office of Public Health, Ira Katz, M.D., senior consultant for mental health program analysis in the VA Office of Mental Health Operations, and colleagues report their findings today in the online issue of American Journal of Public Health. This paper is the result of a collaboration between the VA and NIMH, which is part of the National Institutes of Health.
Dr. McCarthy and colleagues developed their suicide-risk algorithm by studying the VHA patient population from fiscal years 2009-2011. Data on manner of death came from the National Death Index, and predictors of suicide and other types of death came from VHA clinical records. Dividing randomly the patient population in half, the team used data from one half to develop the predictive model, and then tested the model using data from the other half. Each of the two study samples included 3,180 suicide cases and 1,056,004 control patients. Researchers compared predicted suicide risk to actual mortality to assess the performance of the predictive model.
“As the largest health care provider in the U.S., VA has the responsibility to continuously examine how our extensive suicide prevention efforts are working, and to identify critical opportunities for improvement in service to our nation’s Veterans,” said Dr. Caitlin Thompson, Deputy Director for Suicide Prevention for VA. “This collaborative effort with NIMH provides us with unprecedented information that will allow us to design and implement innovative strategies on how to assess and care for those Veterans who may be at high risk for suicide. This model will advance the care provided to Veterans through VA’s suicide prevention programs to allow us to better tailor our suicide prevention efforts so that we can ensure that ALL Veterans remain safe.”
The VHA care system identifies patients as being at high-risk of suicide based on information assessed during clinical encounters. Researchers found that their predictive model was more sensitive than this clinical flagging, in the sense that, even in groups with the highest predicted suicide risk based on the model, less than one-third of patients had been identified clinically.
“This is valuable, because it gives the VA more extensive information about suicide risk,” said Michael Schoenbaum, Ph.D., senior advisor for mental health service, epidemiology and economics at NIMH and one of the co-authors of the report. “If the VA can identify small groups of people with a particularly high-risk of suicide, then they can target enhanced prevention and treatment services to these highest-risk individuals,”
“It’s particularly encouraging that these analyses use the types of data available to any large health care system,” said NIMH Director Thomas Insel, M.D. “ These methods could help us prevent civilian as well as veteran suicides.”
In addition to identifying suicide risk, the team looked at deaths among people identified as highest risk for suicide in 2010. The team found that this group had both very high suicide and non-suicide death rates over the next 12 months.
“This finding reinforces the idea that using this process to target suicide risk interventions may have wide benefits across an extended span of time,” concluded Dr. Schoenbaum.
Reference:
McCarthy J.F., et al., Predictive Modeling and Concentration of the Risk of Suicide: Implications for Preventive Interventions in the US Department of Veterans Affairs. American Journal of Public Health (in press)
About the National Institute of Mental Health (NIMH): The mission of the NIMH is to transform the understanding and treatment of mental illnesses through basic and clinical research, paving the way for prevention, recovery and cure.
About the National Institutes of Health (NIH): NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases.
About the Department of Veterans Affairs: The VA is the second largest Federal department with close to 300,000 employees. The Department's mission is to serve America's veterans and their families with dignity and compassion and to be their principal advocate in ensuring that they receive the care, support and recognition earned in service to this Nation.
RESEARCHERS LOOK AT BIOLUMINESCENT CREATURES
FROM: NATIONAL SCIENCE FOUNDATION
Night lights: The wonders of bioluminescent millipedes
A Virginia Tech researcher discusses bioluminescent millipedes and other glowing creatures
There's something inherently magical, even surreal, about seeing hundreds of glowing millipedes scattered across the ground of a sequoia grove on a moonless night in Sequoia National Park.
Every evening, these creatures--which remain hidden underground during the day--emerge and initiate a chemical reaction to produce a green-blue glow, a process called bioluminescence. The eerie night lights of these millipedes highlight nature’s eccentricities. My observations of this phenomena is a fringe benefit of my research of the millipede species known as Motyxia.
Seeing the light
Motyxia, which are the only known bioluminescent millipedes, are found solely in a small region of the Sierra Nevada mountain range in California. But various types of bioluminescent creatures live throughout the United States. They include:
railroad worms, a beetle that looks similar to a millipede but has a string of lights down each of its sides resembling the lit windows of a passenger train at night,
glowworms with bioluminescent lamps on their heads,
a fly larvae with the bluest bioluminescence in the insect world,
firefly larvae that have two abdominal lamps on their tail,
and even luminescent earthworms.
If you would like to see bioluminescent creatures, visit a moist area, such as a gully or streamside, in a deep dark forest late at night--preferably in the early summer, right after a rain.
When you arrive at your viewing sight, turn off your flashlight and let your eyes adjust to the dark. Within about 15 to 30 minutes, you may begin to discern bioluminescent organisms.
Focus on tiny specks of light, which may be firefly larvae. These organisms may quickly turn off their lights when approached--but then turn them on again. So if you initially see a twinkle, note its position relative to nearby stationary objects so that you may see it light up again.
If you want to light your path as you walk, use red light to maintain your light-adapted vision.
Why the turn on?
When you observe bioluminescence, you may wonder about the purpose of this illuminating phenomenon. My research on Motyxia indicates that "Glow means 'No!'" to predators. That is, Motyxia's glow warns nocturnal predators that these 60-legged creatures are armed and dangerous; any predator that riles a Motyxia risks being squirted by toxins, including hydrogen cyanide, an extremely poisonous gas, which the millipede releases when it feels threatened.
The suggestion that Motyxia's glow wards off marauding nocturnal predators is supported by the fact that Motyxia are blind, so their visual signaling can only be seen by members of other species, such as predators.
My research team and I ran an experiment to test whether Motyxia's coloration warns predators to stay away. Our experiment involved positioning 150 glowing clay millipede models and 150 clay non-glowing millipede models in Motyxia's natural nighttime habitat in California.
The results: Predators attacked a significantly lower percentage of the glowing vs. non-glowing models (18 percent vs. 49 percent.) The relatively greater ability of the glowing millipede models to repel predators supports the "Glow Means No!" idea.
Motyxia's eastern cousins possess bright and conspicuous reds and yellows, apparently also to ward off daytime predators.
Other animals that are toxic, inedible, or otherwise noxious also advertise their danger via warning signals. For example, a rattlesnake uses its rattle and the yellow jacket brandishes yellow and black stripes to advertise its threats.
Toxic animals that show bright, highly conspicuous and sometimes downright garish colors to distinguish themselves thereby help prevent predators from mistaking them for edible prey. Such an error would be costly to both predator and prey.
The conspicuous appearance of toxic animals also helps predators learn to recognize their bright coloration as warnings and remember the unpleasant consequences of ignoring them--e.g. a cyanide-induced fever.
How bioluminescence evolved
How did bioluminescence evolve? This question is another focus of our ongoing research on Motyxia.
By helping to reveal the evolutionary origins of warning colorations--which, by necessity, contribute to some of the most blatant and complex appearances in the living world--we expect to improve our ability to investigate and understand how other complex traits arise in nature.
One possible clue to the origins of bioluminescence is provided by a millipede species known as Motyxia sequoiae, which inhabits habitats that are normally off-limits to other closely related millipedes. These habitats include exposed areas of the forest floor, open mountain meadows and the trunks of oak trees.
So perhaps bioluminescence evolved in Motyxia sequoiae to protect these creatures from predators in particularly vulnerable areas, and thereby enable these millipedes to expand their range to these favorable locations.
But why would Motyxia sequoiae evolve bioluminescence instead of any other defense mechanism, such as camouflage or weapons such as claws or sharp spines?
Have you ever heard the saying that "natural selection...works like a tinkerer"? This is a great way to think about the evolution of warning coloration and other complex biologic features. Tinkerers use what's already available (e.g., odds and ends lying around) to repair machines, appliances and other apparatuses.
A body of research suggests that many species may have similarly acquired bioluminescence by "making do" with, or repurposing, biological equipment they already possessed.
For example, fireflies need an enzyme called luciferase to light up. But the original role of the firefly's luciferase wasn't to help these insects produce light, but instead to help them synthesize fatty acids needed to create brain cells.
The essence of bioluminescence
Despite our growing knowledge, much about Motyxia remains mysterious. For example, how do these blind creatures find mates? What triggers their nightly emergence? With funding from the National Science Foundation, my team is working to answer these and other questions.
This research is part of our larger effort to describe biodiversity and reconstruct the evolutionary histories of arthropods--a group that includes insects, spiders and crustaceans, and accounts for 80 percent of all living species. We contribute our findings to the Tree of Life, which is a worldwide effort to define the evolutionary histories of animals.
Some bright ideas from bioluminescence
In addition to advancing our understanding of the history of life, studies of the bioluminescence of various types of organisms have implications for fields ranging from national defense to medicine.
Here are several examples:
The efficiency of electrical lighting systems, which can be only 10 percent efficient, could be improved by designing them to mimic bioluminescent light, which is 90 percent efficient.
The underbellies of some marine bioluminescent animals blend with background light from the water's surface, and so are camouflaged. The U.S. Navy is studying these phenomena so that it may build similarly camouflaged ships.
Healthy human cells produce ultra-weak amounts of light through a process similar to animal bioluminescence, but cancer cells produce slightly more light. Techniques may ultimately be developed to help locate cancer cells by detecting the greater amounts of light they produce.
A green fluorescent protein identified in a jellyfish species is now widely used in biomedical research as a fluorescent tag to help researchers track specific biological activities, such as the spread of cancer, insulin production and the movement of HIV proteins.
The key enzyme for beetle bioluminescence is a pivotal component of a fast, inexpensive method for sequencing genomes, which in 2008 was used to sequence the full genome of a Neanderthal.
Learn more about Dr. Marek's work at jointedlegs.org
-- Paul Marek, Virginia Tech
Investigators
Paul Marek
Related Institutions/Organizations
Virginia Polytechnic Institute and State University
Night lights: The wonders of bioluminescent millipedes
A Virginia Tech researcher discusses bioluminescent millipedes and other glowing creatures
There's something inherently magical, even surreal, about seeing hundreds of glowing millipedes scattered across the ground of a sequoia grove on a moonless night in Sequoia National Park.
Every evening, these creatures--which remain hidden underground during the day--emerge and initiate a chemical reaction to produce a green-blue glow, a process called bioluminescence. The eerie night lights of these millipedes highlight nature’s eccentricities. My observations of this phenomena is a fringe benefit of my research of the millipede species known as Motyxia.
Seeing the light
Motyxia, which are the only known bioluminescent millipedes, are found solely in a small region of the Sierra Nevada mountain range in California. But various types of bioluminescent creatures live throughout the United States. They include:
railroad worms, a beetle that looks similar to a millipede but has a string of lights down each of its sides resembling the lit windows of a passenger train at night,
glowworms with bioluminescent lamps on their heads,
a fly larvae with the bluest bioluminescence in the insect world,
firefly larvae that have two abdominal lamps on their tail,
and even luminescent earthworms.
If you would like to see bioluminescent creatures, visit a moist area, such as a gully or streamside, in a deep dark forest late at night--preferably in the early summer, right after a rain.
When you arrive at your viewing sight, turn off your flashlight and let your eyes adjust to the dark. Within about 15 to 30 minutes, you may begin to discern bioluminescent organisms.
Focus on tiny specks of light, which may be firefly larvae. These organisms may quickly turn off their lights when approached--but then turn them on again. So if you initially see a twinkle, note its position relative to nearby stationary objects so that you may see it light up again.
If you want to light your path as you walk, use red light to maintain your light-adapted vision.
Why the turn on?
When you observe bioluminescence, you may wonder about the purpose of this illuminating phenomenon. My research on Motyxia indicates that "Glow means 'No!'" to predators. That is, Motyxia's glow warns nocturnal predators that these 60-legged creatures are armed and dangerous; any predator that riles a Motyxia risks being squirted by toxins, including hydrogen cyanide, an extremely poisonous gas, which the millipede releases when it feels threatened.
The suggestion that Motyxia's glow wards off marauding nocturnal predators is supported by the fact that Motyxia are blind, so their visual signaling can only be seen by members of other species, such as predators.
My research team and I ran an experiment to test whether Motyxia's coloration warns predators to stay away. Our experiment involved positioning 150 glowing clay millipede models and 150 clay non-glowing millipede models in Motyxia's natural nighttime habitat in California.
The results: Predators attacked a significantly lower percentage of the glowing vs. non-glowing models (18 percent vs. 49 percent.) The relatively greater ability of the glowing millipede models to repel predators supports the "Glow Means No!" idea.
Motyxia's eastern cousins possess bright and conspicuous reds and yellows, apparently also to ward off daytime predators.
Other animals that are toxic, inedible, or otherwise noxious also advertise their danger via warning signals. For example, a rattlesnake uses its rattle and the yellow jacket brandishes yellow and black stripes to advertise its threats.
Toxic animals that show bright, highly conspicuous and sometimes downright garish colors to distinguish themselves thereby help prevent predators from mistaking them for edible prey. Such an error would be costly to both predator and prey.
The conspicuous appearance of toxic animals also helps predators learn to recognize their bright coloration as warnings and remember the unpleasant consequences of ignoring them--e.g. a cyanide-induced fever.
How bioluminescence evolved
How did bioluminescence evolve? This question is another focus of our ongoing research on Motyxia.
By helping to reveal the evolutionary origins of warning colorations--which, by necessity, contribute to some of the most blatant and complex appearances in the living world--we expect to improve our ability to investigate and understand how other complex traits arise in nature.
One possible clue to the origins of bioluminescence is provided by a millipede species known as Motyxia sequoiae, which inhabits habitats that are normally off-limits to other closely related millipedes. These habitats include exposed areas of the forest floor, open mountain meadows and the trunks of oak trees.
So perhaps bioluminescence evolved in Motyxia sequoiae to protect these creatures from predators in particularly vulnerable areas, and thereby enable these millipedes to expand their range to these favorable locations.
But why would Motyxia sequoiae evolve bioluminescence instead of any other defense mechanism, such as camouflage or weapons such as claws or sharp spines?
Have you ever heard the saying that "natural selection...works like a tinkerer"? This is a great way to think about the evolution of warning coloration and other complex biologic features. Tinkerers use what's already available (e.g., odds and ends lying around) to repair machines, appliances and other apparatuses.
A body of research suggests that many species may have similarly acquired bioluminescence by "making do" with, or repurposing, biological equipment they already possessed.
For example, fireflies need an enzyme called luciferase to light up. But the original role of the firefly's luciferase wasn't to help these insects produce light, but instead to help them synthesize fatty acids needed to create brain cells.
The essence of bioluminescence
Despite our growing knowledge, much about Motyxia remains mysterious. For example, how do these blind creatures find mates? What triggers their nightly emergence? With funding from the National Science Foundation, my team is working to answer these and other questions.
This research is part of our larger effort to describe biodiversity and reconstruct the evolutionary histories of arthropods--a group that includes insects, spiders and crustaceans, and accounts for 80 percent of all living species. We contribute our findings to the Tree of Life, which is a worldwide effort to define the evolutionary histories of animals.
Some bright ideas from bioluminescence
In addition to advancing our understanding of the history of life, studies of the bioluminescence of various types of organisms have implications for fields ranging from national defense to medicine.
Here are several examples:
The efficiency of electrical lighting systems, which can be only 10 percent efficient, could be improved by designing them to mimic bioluminescent light, which is 90 percent efficient.
The underbellies of some marine bioluminescent animals blend with background light from the water's surface, and so are camouflaged. The U.S. Navy is studying these phenomena so that it may build similarly camouflaged ships.
Healthy human cells produce ultra-weak amounts of light through a process similar to animal bioluminescence, but cancer cells produce slightly more light. Techniques may ultimately be developed to help locate cancer cells by detecting the greater amounts of light they produce.
A green fluorescent protein identified in a jellyfish species is now widely used in biomedical research as a fluorescent tag to help researchers track specific biological activities, such as the spread of cancer, insulin production and the movement of HIV proteins.
The key enzyme for beetle bioluminescence is a pivotal component of a fast, inexpensive method for sequencing genomes, which in 2008 was used to sequence the full genome of a Neanderthal.
Learn more about Dr. Marek's work at jointedlegs.org
-- Paul Marek, Virginia Tech
Investigators
Paul Marek
Related Institutions/Organizations
Virginia Polytechnic Institute and State University
Wednesday, June 10, 2015
SECRETARY KERRY'S STATEMENT ON 'CLIMATE CHANGE ADAPTATION AND RESILIENCE'
FROM: U.S. STATE DEPARTMENT
Climate Change Adaptation and Resilience
Press Statement
John Kerry
Secretary of State
Washington, DC
June 9, 2015
Climate change poses a threat to every country on Earth, and we all need to do what we can to take advantage of the small window of opportunity we still have to stave off its worst, most disastrous impacts. But even as we take unprecedented steps to mitigate the climate threat, we also have to ensure our communities are prepared for the impacts we know are headed our way – and the impacts we are already seeing all over the world in the form of heat waves, floods, historic droughts, ocean acidification and more.
Thanks to President Obama’s Climate Action Plan, we’ve taken a number of important steps to increase the resilience of American communities. But as the President has always said, this is a global challenge, and we’re not going to get very far if we keep our efforts contained within our borders. That’s why the United States is deeply committed to helping the rest of the world – especially the poorest and most vulnerable nations – adapt to the changing climate as well.
As part of that commitment, last fall, President Obama announced his intention to create a private-public partnership to provide climate data and information to help promote resilient development worldwide. Today we formally launched the Climate Services for Resilient Development partnership, along with the government of the United Kingdom and our partners at the American Red Cross, the Asian Development Bank, Esri, Google, the Inter-American Development and the Skoll Global Threats Fund. In addition to the $34 million we and our partners are putting toward that new partnership, we also announced a series of individual steps we’re taking to make adapting to climate change easier around the globe – including, for example, the volunteer “climate resilience corps” that the Peace Corps and AmeriCorps will be launching in developing countries, and NASA’s release of the first-ever climate modeling system that breaks data down to the country level, which will enable countries to better target their individual adaptation planning efforts.
In the United States, we’ve developed some of the most advanced technologies and scientific expertise on climate change, and we want to make sure these tools are reaching those who need it the most. Each of the commitments announced today will make it easier for people to take control of their own futures and play an active role in helping to prepare their communities, their countries, and ultimately their planet for the changes ahead.
When it comes to confronting climate change, no country should be forced to go it alone – because no country can possibly address this threat alone. It will require all of us – every country, around the world, doing what it can to contribute to the solution. That understanding is at the core of the initiatives we are unveiling today, it’s what is driving our work toward an ambitious global agreement in Paris later this year, and it’s what will continue to guide our leadership in the fight against climate change in the months and years to come.
Climate Change Adaptation and Resilience
Press Statement
John Kerry
Secretary of State
Washington, DC
June 9, 2015
Climate change poses a threat to every country on Earth, and we all need to do what we can to take advantage of the small window of opportunity we still have to stave off its worst, most disastrous impacts. But even as we take unprecedented steps to mitigate the climate threat, we also have to ensure our communities are prepared for the impacts we know are headed our way – and the impacts we are already seeing all over the world in the form of heat waves, floods, historic droughts, ocean acidification and more.
Thanks to President Obama’s Climate Action Plan, we’ve taken a number of important steps to increase the resilience of American communities. But as the President has always said, this is a global challenge, and we’re not going to get very far if we keep our efforts contained within our borders. That’s why the United States is deeply committed to helping the rest of the world – especially the poorest and most vulnerable nations – adapt to the changing climate as well.
As part of that commitment, last fall, President Obama announced his intention to create a private-public partnership to provide climate data and information to help promote resilient development worldwide. Today we formally launched the Climate Services for Resilient Development partnership, along with the government of the United Kingdom and our partners at the American Red Cross, the Asian Development Bank, Esri, Google, the Inter-American Development and the Skoll Global Threats Fund. In addition to the $34 million we and our partners are putting toward that new partnership, we also announced a series of individual steps we’re taking to make adapting to climate change easier around the globe – including, for example, the volunteer “climate resilience corps” that the Peace Corps and AmeriCorps will be launching in developing countries, and NASA’s release of the first-ever climate modeling system that breaks data down to the country level, which will enable countries to better target their individual adaptation planning efforts.
In the United States, we’ve developed some of the most advanced technologies and scientific expertise on climate change, and we want to make sure these tools are reaching those who need it the most. Each of the commitments announced today will make it easier for people to take control of their own futures and play an active role in helping to prepare their communities, their countries, and ultimately their planet for the changes ahead.
When it comes to confronting climate change, no country should be forced to go it alone – because no country can possibly address this threat alone. It will require all of us – every country, around the world, doing what it can to contribute to the solution. That understanding is at the core of the initiatives we are unveiling today, it’s what is driving our work toward an ambitious global agreement in Paris later this year, and it’s what will continue to guide our leadership in the fight against climate change in the months and years to come.
CYBER PHYSICAL THERAPY BEING TRIED BY VETERANS
FROM: NATIONAL SCIENCE FOUNDATION
Veterans will be first to try cyber physical therapy
High-speed research networks help scientists develop and deploy future health technologies
The Internet has been transformational, changing how we communicate with friends and family, how we shop, and more recently, how we heal. Physical therapy is the latest treatment to be offered as telemedicine, with an experimental system now connecting specialists to patients to provide help they otherwise couldn't get, aiding recovery from serious ailments, from broken limbs to stroke.
In an effort to connect physical therapy with wounded veterans far from treatment facilities, researchers from the University of Texas (UT) at Dallas have developed a rehabilitation system that uses real-time video, 3-D computer-generated worlds and force-feedback "haptic" devices to re-create a physical therapy session between a patient and a therapist, all at long distance over high-speed networks.
The team demonstrated the system at the Beyond Today's Internet Summit in March 2015. Organized by US Ignite and the Global Environment for Networking Innovations (GENI), two groups dedicated to advancing the frontiers of the Internet, the event showed what new capabilities are possible with ultra-high-speed, "smart", programmable networks.
Powerful Internet brings powerful applications
Though the majority of U.S. citizens still have Internet connection speeds in the tens of megabits per second, through the GENI and US Ignite programs, supported by the U.S. National Science Foundation, researchers, experts and some communities are able to access gigabit networks with speeds 40-100 times faster than standard networks.
For 3-D tele-rehabilitation to be lifelike and effective requires the system to have virtually no lag-time--or latency, in networking lingo--between action and reaction.
"To transfer all of this data requires a bandwidth greater than 100 megabits per second, which we currently can't do over the Internet," said Karthik Venkataraman, a Ph.D. student working on the computer-enabled health technologies in computer scientist Balakrishnan Prabhakaran's Multimedia Systems Lab at UT Dallas."GENI and US Ignite provide the bandwidth and low latency that is required by these kinds of applications."
Reach out and touch someone
Every year, physical therapists help millions of people recover from the debilitating impacts of strokes, injuries and a range of other ailments--but not everyone has access to a treatment facility or a physical therapy professional.
"We're trying to virtualize a physical therapy session in which a patient and a therapist cannot be present at the same location," explained Venkataraman.
To bring the tele-rehabilitation to life, the system uses Microsoft Kinect to create 3-D, real-time models of the patient and the doctor. The models then join a shared virtual environment, a computer-generated space customized by the participants.
To simulate the touch aspect of the physical therapy session, the patient responds to a touch-sensitive "haptic" arm controlled by the therapist via a paired haptic device.
At the summit, the team demonstrated a physical therapy session in which two individuals practice sawing a log, a task that mimics the movements used by recovering stroke patients. The participants feel both the resistance of the log and the guiding movements of their partner, just as would occur at an in-person therapy session.
The researchers say this is just one example of what can be achieved with next-generation networks that support high-bandwidth and low-latency communication. The team is also working on extending the tele-rehabilitation system so one therapist or physician can work with multiple patients at the same time.
"This scaled-up version will ensure privacy in the sense that the patients will not be able to see other patients. Only the therapist will be able to view and monitor multiple patients," said Prabhakaran Balakrishnan, the lead researcher on the project. "The therapist will also be able to pick one patient and work with him or her on a one-to-one basis."
In collaboration with Thiru Annaswamy, a physician and assistant professor of medicine, the 3-D tele-rehabilitation system will be deployed at the Dallas Veterans Affairs Medical Center and used to help rehabilitate disabled veterans, with field trials beginning in June.
"If the patient and the therapist cannot be in the same location," Venkataraman said, "we still want to be able to give that virtual experience of him or her being together with the therapist in the same room."
-- Aaron Dubrow, (
Investigators
Balakrishnan Prabhakaran
Ovidiu Daescu
Mark Spong
Xiaohu Guo
Gopal Gupta
Dinesh Bhatia
Roozbeh Jafari
Related Institutions/Organizations
University of Texas at Dallas
Dallas Veterans Affairs Medical Center
Veterans will be first to try cyber physical therapy
High-speed research networks help scientists develop and deploy future health technologies
The Internet has been transformational, changing how we communicate with friends and family, how we shop, and more recently, how we heal. Physical therapy is the latest treatment to be offered as telemedicine, with an experimental system now connecting specialists to patients to provide help they otherwise couldn't get, aiding recovery from serious ailments, from broken limbs to stroke.
In an effort to connect physical therapy with wounded veterans far from treatment facilities, researchers from the University of Texas (UT) at Dallas have developed a rehabilitation system that uses real-time video, 3-D computer-generated worlds and force-feedback "haptic" devices to re-create a physical therapy session between a patient and a therapist, all at long distance over high-speed networks.
The team demonstrated the system at the Beyond Today's Internet Summit in March 2015. Organized by US Ignite and the Global Environment for Networking Innovations (GENI), two groups dedicated to advancing the frontiers of the Internet, the event showed what new capabilities are possible with ultra-high-speed, "smart", programmable networks.
Powerful Internet brings powerful applications
Though the majority of U.S. citizens still have Internet connection speeds in the tens of megabits per second, through the GENI and US Ignite programs, supported by the U.S. National Science Foundation, researchers, experts and some communities are able to access gigabit networks with speeds 40-100 times faster than standard networks.
For 3-D tele-rehabilitation to be lifelike and effective requires the system to have virtually no lag-time--or latency, in networking lingo--between action and reaction.
"To transfer all of this data requires a bandwidth greater than 100 megabits per second, which we currently can't do over the Internet," said Karthik Venkataraman, a Ph.D. student working on the computer-enabled health technologies in computer scientist Balakrishnan Prabhakaran's Multimedia Systems Lab at UT Dallas."GENI and US Ignite provide the bandwidth and low latency that is required by these kinds of applications."
Reach out and touch someone
Every year, physical therapists help millions of people recover from the debilitating impacts of strokes, injuries and a range of other ailments--but not everyone has access to a treatment facility or a physical therapy professional.
"We're trying to virtualize a physical therapy session in which a patient and a therapist cannot be present at the same location," explained Venkataraman.
To bring the tele-rehabilitation to life, the system uses Microsoft Kinect to create 3-D, real-time models of the patient and the doctor. The models then join a shared virtual environment, a computer-generated space customized by the participants.
To simulate the touch aspect of the physical therapy session, the patient responds to a touch-sensitive "haptic" arm controlled by the therapist via a paired haptic device.
At the summit, the team demonstrated a physical therapy session in which two individuals practice sawing a log, a task that mimics the movements used by recovering stroke patients. The participants feel both the resistance of the log and the guiding movements of their partner, just as would occur at an in-person therapy session.
The researchers say this is just one example of what can be achieved with next-generation networks that support high-bandwidth and low-latency communication. The team is also working on extending the tele-rehabilitation system so one therapist or physician can work with multiple patients at the same time.
"This scaled-up version will ensure privacy in the sense that the patients will not be able to see other patients. Only the therapist will be able to view and monitor multiple patients," said Prabhakaran Balakrishnan, the lead researcher on the project. "The therapist will also be able to pick one patient and work with him or her on a one-to-one basis."
In collaboration with Thiru Annaswamy, a physician and assistant professor of medicine, the 3-D tele-rehabilitation system will be deployed at the Dallas Veterans Affairs Medical Center and used to help rehabilitate disabled veterans, with field trials beginning in June.
"If the patient and the therapist cannot be in the same location," Venkataraman said, "we still want to be able to give that virtual experience of him or her being together with the therapist in the same room."
-- Aaron Dubrow, (
Investigators
Balakrishnan Prabhakaran
Ovidiu Daescu
Mark Spong
Xiaohu Guo
Gopal Gupta
Dinesh Bhatia
Roozbeh Jafari
Related Institutions/Organizations
University of Texas at Dallas
Dallas Veterans Affairs Medical Center
Sunday, June 7, 2015
GEMINI IV EARTHVIEW
FROM: NASA
June 4, 1965, Earth Observations From Gemini IV
 |
This photograph of the Florida Straits and Grand Bahama Bank was taken during the Gemini IV mission during orbit no. 19, on June 4, 1965, with a Hasselblad camera and a 70mm lens. The Gemini IV crew -- astronauts Jim McDivitt and Ed White -- conducted scientific experiments, including photography of Earth's weather and terrain, for the remainder of their four-day mission following White's historic first American spacewalk on June 3.
Astronauts have been photographing Earth from space since the early Mercury missions beginning in 1961. Today, they observe the Earth from their unique point of view aboard the International Space Station, providing researchers with key data and recording changes over time from human-caused changes like urban growth and reservoir construction, to natural dynamic events such as hurricanes, floods and volcanic eruptions.
Image Credit: NASA
|
RESEARCHERS SAY OCEAN WARMING WILL LEAD TO MARINE ANIMAL MIGRATION
FROM: NATIONAL SCIENCE FOUNDATION
Warmer, lower-oxygen oceans will shift marine habitats
Changes will result in marine animals moving away from equator
Modern mountain climbers usually carry tanks of oxygen to help them reach the summit. The combination of physical exertion and lack of oxygen at high altitudes creates a major challenge for mountaineers.
Now, just in time for World Oceans Day on Monday, June 8, researchers have found that the same principle applies to marine species during climate change.
Warmer water temperatures will speed up the animals' metabolic need for oxygen, as also happens during exercise, but the warmer water will hold less of the oxygen needed to fuel their bodies, similar to what happens at high altitudes.
Results of the study are published in this week's issue of the journal Science.
"This work is important because it links metabolic constraints to changes in marine temperatures and oxygen supply," said Irwin Forseth, program director in the National Science Foundation's (NSF) Division of Integrative Organismal Systems, which funded the research along with NSF's Division of Ocean Sciences.
"Understanding connections such as this is essential to allow us to predict the effects of environmental changes on the distribution and diversity of marine life.”
Marine animals pushed away from equator
The scientists found that these changes will act to push marine animals away from the equator. About two thirds of the respiratory stress due to climate change is caused by warmer temperatures, while the rest is because warmer water holds less dissolved gases such as oxygen.
"If your metabolism goes up, you need more food and you need more oxygen," said lead paper author Curtis Deutsch of the University of Washington.
"Aquatic animals could become oxygen-starved in a warmer future, even if oxygen doesn't change. We know that oxygen levels in the ocean are going down now and will decrease more with climate warming."
Four Atlantic Ocean species studied
The study centered on four Atlantic Ocean species whose temperature and oxygen requirements are well known from lab tests: Atlantic cod in the open ocean; Atlantic rock crab in coastal waters; sharp snout seabream in the sub-tropical Atlantic; and common eelpout, a bottom-dwelling fish in shallow waters in high northern latitudes.
Deutsch and colleagues used climate models to see how projected temperature and oxygen levels by 2100 would affect the four species ability to meet their future energy needs.
The near-surface ocean is projected to warm by several degrees Celsius by the end of this century. Seawater at that temperature would hold 5-10 percent less oxygen than it does now.
Results show that future rock crab habitat, for example, would be restricted to shallower water, hugging the more oxygenated surface.
Equatorial part of animals' ranges uninhabitable
For all four species, the equatorial part of their ranges would become uninhabitable because peak oxygen demand would be greater than the supply.
Viable habitats would shift away from the equator, displacing from 14 percent to 26 percent of the current ranges.
The authors believe the results are relevant for all marine species that rely on aquatic oxygen as an energy source.
"The Atlantic Ocean is relatively well-oxygenated," Deutsch said. "If there's oxygen restriction in the Atlantic Ocean marine habitat, then it should be everywhere."
Climate models predict that the northern Pacific Ocean's relatively low oxygen levels will decline even more, making it the most vulnerable part of the seas to habitat loss.
"For aquatic animals that are breathing water, warming temperatures create a problem of limited oxygen supply versus higher demand," said co-author Raymond Huey, a University of Washington biologist who has studied metabolism in land animals and in human mountain climbers.
"This simple metabolic index seems to correlate with the current distributions of marine organisms," he said. "That means that it gives us the power to predict how range limits are going to shift with warming."
A day-to-day "dead zone"
Previously, marine scientists thought about oxygen more in terms of extreme events that could cause regional die-offs of marine animals, also known as dead zones.
"We found that oxygen is also a day-to-day restriction on where species will live," Deutsch said.
"The effect we're describing will be part of what's pushing species around in the future."
Other co-authors are Hans Otto-Portner of the Alfred Wegener Institute in Germany; Aaron Ferrel of the University of California, Los Angeles; and Brad Seibel at the University of Rhode Island.
The Gordon and Betty Moore Foundation and the Alfred Wegener Institute also funded the research.
-NSF-
Media Contacts
Cheryl Dybas, NSF
Warmer, lower-oxygen oceans will shift marine habitats
Changes will result in marine animals moving away from equator
Modern mountain climbers usually carry tanks of oxygen to help them reach the summit. The combination of physical exertion and lack of oxygen at high altitudes creates a major challenge for mountaineers.
Now, just in time for World Oceans Day on Monday, June 8, researchers have found that the same principle applies to marine species during climate change.
Warmer water temperatures will speed up the animals' metabolic need for oxygen, as also happens during exercise, but the warmer water will hold less of the oxygen needed to fuel their bodies, similar to what happens at high altitudes.
Results of the study are published in this week's issue of the journal Science.
"This work is important because it links metabolic constraints to changes in marine temperatures and oxygen supply," said Irwin Forseth, program director in the National Science Foundation's (NSF) Division of Integrative Organismal Systems, which funded the research along with NSF's Division of Ocean Sciences.
"Understanding connections such as this is essential to allow us to predict the effects of environmental changes on the distribution and diversity of marine life.”
Marine animals pushed away from equator
The scientists found that these changes will act to push marine animals away from the equator. About two thirds of the respiratory stress due to climate change is caused by warmer temperatures, while the rest is because warmer water holds less dissolved gases such as oxygen.
"If your metabolism goes up, you need more food and you need more oxygen," said lead paper author Curtis Deutsch of the University of Washington.
"Aquatic animals could become oxygen-starved in a warmer future, even if oxygen doesn't change. We know that oxygen levels in the ocean are going down now and will decrease more with climate warming."
Four Atlantic Ocean species studied
The study centered on four Atlantic Ocean species whose temperature and oxygen requirements are well known from lab tests: Atlantic cod in the open ocean; Atlantic rock crab in coastal waters; sharp snout seabream in the sub-tropical Atlantic; and common eelpout, a bottom-dwelling fish in shallow waters in high northern latitudes.
Deutsch and colleagues used climate models to see how projected temperature and oxygen levels by 2100 would affect the four species ability to meet their future energy needs.
The near-surface ocean is projected to warm by several degrees Celsius by the end of this century. Seawater at that temperature would hold 5-10 percent less oxygen than it does now.
Results show that future rock crab habitat, for example, would be restricted to shallower water, hugging the more oxygenated surface.
Equatorial part of animals' ranges uninhabitable
For all four species, the equatorial part of their ranges would become uninhabitable because peak oxygen demand would be greater than the supply.
Viable habitats would shift away from the equator, displacing from 14 percent to 26 percent of the current ranges.
The authors believe the results are relevant for all marine species that rely on aquatic oxygen as an energy source.
"The Atlantic Ocean is relatively well-oxygenated," Deutsch said. "If there's oxygen restriction in the Atlantic Ocean marine habitat, then it should be everywhere."
Climate models predict that the northern Pacific Ocean's relatively low oxygen levels will decline even more, making it the most vulnerable part of the seas to habitat loss.
"For aquatic animals that are breathing water, warming temperatures create a problem of limited oxygen supply versus higher demand," said co-author Raymond Huey, a University of Washington biologist who has studied metabolism in land animals and in human mountain climbers.
"This simple metabolic index seems to correlate with the current distributions of marine organisms," he said. "That means that it gives us the power to predict how range limits are going to shift with warming."
A day-to-day "dead zone"
Previously, marine scientists thought about oxygen more in terms of extreme events that could cause regional die-offs of marine animals, also known as dead zones.
"We found that oxygen is also a day-to-day restriction on where species will live," Deutsch said.
"The effect we're describing will be part of what's pushing species around in the future."
Other co-authors are Hans Otto-Portner of the Alfred Wegener Institute in Germany; Aaron Ferrel of the University of California, Los Angeles; and Brad Seibel at the University of Rhode Island.
The Gordon and Betty Moore Foundation and the Alfred Wegener Institute also funded the research.
-NSF-
Media Contacts
Cheryl Dybas, NSF
Wednesday, June 3, 2015
CHARLES RIVKIN'S REMARKS AT MIT MEDIA LAB FUTURE CITY WORKSHOP
FROM: U.S. STATE DEPARTMENT
06/02/2015 11:38 AM EDT
Remarks at the Massachusetts Institute of Technology Media Lab Future City Workshop
Remarks
Charles H. Rivkin
Assistant Secretary, Bureau of Economic and Business Affairs
Taiwan Air Force (TAF) Innovation Base
Taipei, Taiwan
June 2, 2015
Mr. Premier, Mr. Deputy Minister, distinguished guests, and ladies and gentlemen.
It’s an honor to be part of today’s ceremony. And as a former businessman myself, it’s a pleasure to speak with innovators and aspiring entrepreneurs like you.
Before I was Assistant Secretary of State for Economic and Business Affairs, I was the U.S. Ambassador to France, and before that I spent 20 years working as President and CEO in the entertainment industry in California.
I ran an award-winning entertainment companies such as The Jim Henson Company, which created the world-famous “Muppets.” I also worked at a company called Wildbrain, which created an innovative educational TV series called “Yo Gabba Gabba!”
I want to tell you a quick story about that program. When I worked at Wildbrain, I met these young, creative entrepreneurs in Southern California that wanted to reinvent children’s television. They were parents that didn’t want to watch shows with their children that they couldn’t stand. They wanted to put the “cool” back in preschool.
They created a show that brought in young indie rock bands like the Ting Tings, the Shins, the Roots, Weezer, and Devo. They even had beatboxer Biz Markie teaching counting. So guess what… no one wanted to buy it. They were scared. It was different. No one had seen anything like it before. What if the show failed?
These entrepreneurs borrowed money to produce one episode and put it up on their own website. Traffic was so high that the server crashed. They moved it to YouTube and received millions of hits. Now networks called us begging to pick up the show they had passed on.
Being an entrepreneur means you don’t listen to “no.” You keep pushing. If you fail, you learn from your failure.
Having shared that story, I am profoundly aware that the world has changed in so many ways, especially for people like you. You’re part of a generation that has grown up with two seemingly opposed realities.
One is the idea that the internet, technology and other hallmarks of modern life have made things easier, more accessible and easier to connect with a global community.
But the other reality is this: When it comes to finding economic opportunity, whether that’s finding a job or building a business, there is nothing easy at all. You’re on your own.
So what does a young person do in a world where the only message seems to be: “Create it yourself”? I think we all know the answer to that question. I certainly did as a businessman in California: It’s about being an entrepreneur.
But being an entrepreneur isn’t enough. You can dream about what you want. But you also need support in many different ways.
That can include a business education – I received an MBA myself – or start-up money so you can launch your business. It can be an incubator where you can develop your idea, and in the larger sense, a government that adopts policies that support the aspirations of people like you.
It can also be a reliable and respected system of patents, copyrights, trademarks and trade secret protection to promote the products of your innovation and hard work.
As you heard from Dr. Larson, it can mean support from a university that understands the importance of the links between education, innovation, and economic opportunity – and the importance of supporting entrepreneurs so that societies can benefit and prosper.
MIT has been educating leaders since 1861 – when the industrial revolution was at full tilt. Now it’s a leader in the next revolution.
Today, faculty members, research staff, and students at the Media Lab work in more than 25 research groups on more than 350 projects. They include digital approaches for treating neurological disorders, creating stackable electric cars for sustainable cities, and creating new imaging technologies that can “see around a corner.”
Media Lab entrepreneurship programs have already resulted in more than 130 spin-offs – so I am sure you are proud and excited to be part of this. Even the building in which we’re sitting reflects the can-do spirit that is so obviously encouraged here. It used to be an Air Force facility. Now it’s the TAF Innovation Base.
But I’m not only here as a former businessman. I’m also here to tell you that my government – and my Bureau – are working in many different ways to support entrepreneurs and innovators in the Asia-Pacific region and around the world.
Through various efforts such as our Global Entrepreneurship Program – or GEP – we work with the private sector and other partners within the U.S. government to train and empower thousands of aspiring entrepreneurs.
We create programs and workshops similar to this one, and make tools and networks available to you. We help small businesses expand into new markets. We help mobilize new investments.
We connect emerging innovators with mentors and networks, and we expand access to capital.
As we support entrepreneurs in hands-on ways, we also work with other economies to create better environments for innovators like you. That includes working to implement and enforce intellectual property rights so no one can steal your ideas or new products. By protecting innovators and creators, we also reassure their investors to take those risks which propel innovation.
We are happy to be long-term and like-minded partners with Taiwan on IPR protection – not only bilaterally but through organizations like the WTO and APEC.
We undertake these policies not only to protect creators but to generate revenue and create jobs.
And that’s why today, I am pleased to announce the launch of a joint strategy on IPR and innovation, dedicated to enhancing this climate for innovation.
In fact, I am joined today by U.S. Patent and Trademark Office Senior Counsel Mark Cohen, who’s part of a team of U.S. and Taiwan partners focused on precisely that.
In a world where the message is “Create it yourself,” it’s critical to make sure that what you create isn’t just protected but rewarded.
So as this new joint strategy shows, we are very much in your corner as innovators. I would like to share three big reasons why we support you.
First of all, each one of you is a winner. That’s why you’re here today. We know that when you back winners, they tend to spread their success around. They grow communities and economies. That’s why entrepreneurs and small to medium businesses are the backbone of virtually every economy in the world.
Secondly, young people are an enormous human resource in the world, and they’re not being supported enough.
Third, as I mentioned earlier, young people around the world have grown up on the internet and connective technology. We need to harness that potential so they can build businesses, distribute their works, network with others, identify funding sources, and succeed.
When we do that, we help to empower a new generation of problem solvers – which is critical, given the challenges we face around the world.
We have a choice. Do we stand by and let economic frustrations grow? Or do we find ways to support young people, so they can build and develop their ideas and grow their communities and their national economies, and their regional partnerships?
There is really only one answer.
One of the great – I would even say magical – effects of entrepreneurism is its power to ripple outwards.
When you create a new product or service, and then build a business around it, it isn’t just you that benefits. It’s the people you hire. They get a salary that will help their families. It’s also the customers who win from the service or the product or the social benefit you are offering. And when other entrepreneurs do similar things, whole communities begin to see the benefits and prosper.
Imagine what we can do when we empower more entrepreneurs like you to work, not only for yourselves but across this region. You’ll be able to identify common challenges that no economy can meet by itself, like lifting people out of poverty, combating climate change, or preventing the spread of disease. You can share your best ideas and your most inspired works. You can communicate in new ways with people across cultures and between faiths. In writing your own futures, you’ll write better ones for everybody.
President Obama was recently talking with entrepreneurs and he said: “I believe that entrepreneurs like you can make the world a better place, one idea at a time. You are going to be how change happens – one person, one step, one business, one city, one country at a time.”
As I look at you, I can see that’s true. And before I conclude, I want to share a quote from Thomas Edison. As you probably know, he was one of America’s most famous entrepreneurs, who invented so many things, from movie cameras to lightbulbs. He once said: “I haven’t failed. I just found 10,000 ways that don’t work.”
Looking around this room, I see the kind of people who have already found a way that works for them. All you need is a little support. And here under this new partnership between the Taiwan Air Force Innovation Park and the MIT Media Lab, you are in good hands.
So, my sincere congratulations on being part of this fantastic program, and we all look forward to seeing what you can achieve – and how that will contribute to Taiwan’s future, and the world’s future, in the months and years to come. Thank you.
06/02/2015 11:38 AM EDT
Remarks at the Massachusetts Institute of Technology Media Lab Future City Workshop
Remarks
Charles H. Rivkin
Assistant Secretary, Bureau of Economic and Business Affairs
Taiwan Air Force (TAF) Innovation Base
Taipei, Taiwan
June 2, 2015
Mr. Premier, Mr. Deputy Minister, distinguished guests, and ladies and gentlemen.
It’s an honor to be part of today’s ceremony. And as a former businessman myself, it’s a pleasure to speak with innovators and aspiring entrepreneurs like you.
Before I was Assistant Secretary of State for Economic and Business Affairs, I was the U.S. Ambassador to France, and before that I spent 20 years working as President and CEO in the entertainment industry in California.
I ran an award-winning entertainment companies such as The Jim Henson Company, which created the world-famous “Muppets.” I also worked at a company called Wildbrain, which created an innovative educational TV series called “Yo Gabba Gabba!”
I want to tell you a quick story about that program. When I worked at Wildbrain, I met these young, creative entrepreneurs in Southern California that wanted to reinvent children’s television. They were parents that didn’t want to watch shows with their children that they couldn’t stand. They wanted to put the “cool” back in preschool.
They created a show that brought in young indie rock bands like the Ting Tings, the Shins, the Roots, Weezer, and Devo. They even had beatboxer Biz Markie teaching counting. So guess what… no one wanted to buy it. They were scared. It was different. No one had seen anything like it before. What if the show failed?
These entrepreneurs borrowed money to produce one episode and put it up on their own website. Traffic was so high that the server crashed. They moved it to YouTube and received millions of hits. Now networks called us begging to pick up the show they had passed on.
Being an entrepreneur means you don’t listen to “no.” You keep pushing. If you fail, you learn from your failure.
Having shared that story, I am profoundly aware that the world has changed in so many ways, especially for people like you. You’re part of a generation that has grown up with two seemingly opposed realities.
One is the idea that the internet, technology and other hallmarks of modern life have made things easier, more accessible and easier to connect with a global community.
But the other reality is this: When it comes to finding economic opportunity, whether that’s finding a job or building a business, there is nothing easy at all. You’re on your own.
So what does a young person do in a world where the only message seems to be: “Create it yourself”? I think we all know the answer to that question. I certainly did as a businessman in California: It’s about being an entrepreneur.
But being an entrepreneur isn’t enough. You can dream about what you want. But you also need support in many different ways.
That can include a business education – I received an MBA myself – or start-up money so you can launch your business. It can be an incubator where you can develop your idea, and in the larger sense, a government that adopts policies that support the aspirations of people like you.
It can also be a reliable and respected system of patents, copyrights, trademarks and trade secret protection to promote the products of your innovation and hard work.
As you heard from Dr. Larson, it can mean support from a university that understands the importance of the links between education, innovation, and economic opportunity – and the importance of supporting entrepreneurs so that societies can benefit and prosper.
MIT has been educating leaders since 1861 – when the industrial revolution was at full tilt. Now it’s a leader in the next revolution.
Today, faculty members, research staff, and students at the Media Lab work in more than 25 research groups on more than 350 projects. They include digital approaches for treating neurological disorders, creating stackable electric cars for sustainable cities, and creating new imaging technologies that can “see around a corner.”
Media Lab entrepreneurship programs have already resulted in more than 130 spin-offs – so I am sure you are proud and excited to be part of this. Even the building in which we’re sitting reflects the can-do spirit that is so obviously encouraged here. It used to be an Air Force facility. Now it’s the TAF Innovation Base.
But I’m not only here as a former businessman. I’m also here to tell you that my government – and my Bureau – are working in many different ways to support entrepreneurs and innovators in the Asia-Pacific region and around the world.
Through various efforts such as our Global Entrepreneurship Program – or GEP – we work with the private sector and other partners within the U.S. government to train and empower thousands of aspiring entrepreneurs.
We create programs and workshops similar to this one, and make tools and networks available to you. We help small businesses expand into new markets. We help mobilize new investments.
We connect emerging innovators with mentors and networks, and we expand access to capital.
As we support entrepreneurs in hands-on ways, we also work with other economies to create better environments for innovators like you. That includes working to implement and enforce intellectual property rights so no one can steal your ideas or new products. By protecting innovators and creators, we also reassure their investors to take those risks which propel innovation.
We are happy to be long-term and like-minded partners with Taiwan on IPR protection – not only bilaterally but through organizations like the WTO and APEC.
We undertake these policies not only to protect creators but to generate revenue and create jobs.
And that’s why today, I am pleased to announce the launch of a joint strategy on IPR and innovation, dedicated to enhancing this climate for innovation.
In fact, I am joined today by U.S. Patent and Trademark Office Senior Counsel Mark Cohen, who’s part of a team of U.S. and Taiwan partners focused on precisely that.
In a world where the message is “Create it yourself,” it’s critical to make sure that what you create isn’t just protected but rewarded.
So as this new joint strategy shows, we are very much in your corner as innovators. I would like to share three big reasons why we support you.
First of all, each one of you is a winner. That’s why you’re here today. We know that when you back winners, they tend to spread their success around. They grow communities and economies. That’s why entrepreneurs and small to medium businesses are the backbone of virtually every economy in the world.
Secondly, young people are an enormous human resource in the world, and they’re not being supported enough.
Third, as I mentioned earlier, young people around the world have grown up on the internet and connective technology. We need to harness that potential so they can build businesses, distribute their works, network with others, identify funding sources, and succeed.
When we do that, we help to empower a new generation of problem solvers – which is critical, given the challenges we face around the world.
We have a choice. Do we stand by and let economic frustrations grow? Or do we find ways to support young people, so they can build and develop their ideas and grow their communities and their national economies, and their regional partnerships?
There is really only one answer.
One of the great – I would even say magical – effects of entrepreneurism is its power to ripple outwards.
When you create a new product or service, and then build a business around it, it isn’t just you that benefits. It’s the people you hire. They get a salary that will help their families. It’s also the customers who win from the service or the product or the social benefit you are offering. And when other entrepreneurs do similar things, whole communities begin to see the benefits and prosper.
Imagine what we can do when we empower more entrepreneurs like you to work, not only for yourselves but across this region. You’ll be able to identify common challenges that no economy can meet by itself, like lifting people out of poverty, combating climate change, or preventing the spread of disease. You can share your best ideas and your most inspired works. You can communicate in new ways with people across cultures and between faiths. In writing your own futures, you’ll write better ones for everybody.
President Obama was recently talking with entrepreneurs and he said: “I believe that entrepreneurs like you can make the world a better place, one idea at a time. You are going to be how change happens – one person, one step, one business, one city, one country at a time.”
As I look at you, I can see that’s true. And before I conclude, I want to share a quote from Thomas Edison. As you probably know, he was one of America’s most famous entrepreneurs, who invented so many things, from movie cameras to lightbulbs. He once said: “I haven’t failed. I just found 10,000 ways that don’t work.”
Looking around this room, I see the kind of people who have already found a way that works for them. All you need is a little support. And here under this new partnership between the Taiwan Air Force Innovation Park and the MIT Media Lab, you are in good hands.
So, my sincere congratulations on being part of this fantastic program, and we all look forward to seeing what you can achieve – and how that will contribute to Taiwan’s future, and the world’s future, in the months and years to come. Thank you.
Tuesday, June 2, 2015
RESEARCH SHOWS MEDIA EXPOSURE TO TERROR MAY INCREASE STRESS RELATED SYMPTOMS
FROM: NATIONAL SCIENCE FOUNDATION
Responding to terror (again): A study of the Boston Marathon bombing
Media exposure to prior tragedies may sensitize people to new disasters
The city of Boston endured one of the worst terrorist attacks on U.S. soil in April 2013, when two pressure-cooker bombs exploded near the finish line of the Boston Marathon. While emergency workers responded to the chaos and law enforcement agencies began a manhunt for the perpetrators, Americans fixed their attention to television screens, Internet news sites and forums, and Twitter, Facebook and other social media.
In doing so, some of those people may have been raising their acute stress levels, with a corresponding increase in symptoms such as difficulty sleeping, a sense of emotional numbness, or re-experiencing their trauma. Such responses, exhibited shortly after exposure to a trauma, have been linked with long-term negative health effects.
A trio of researchers in psychology and social behavior and nursing science at the University of California (UC), Irvine--supported by the Social Psychology Program in the National Science Foundation's (NSF) Social, Behavioral and Economic Sciences Directorate--released a paper last year finding that for some individuals, intense exposure to the Boston marathon bombing through media coverage could be associated with more stress symptoms than those who had direct exposure to the attack. Their latest research article, published this month, finds that the likelihood of those symptoms developing also increases with multiple exposures to prior trauma.
In other words, the more hours you spend following disasters and tragedies in the media, the more sensitized you may become.
"Media-based exposure to these large, collective traumas--these community disasters--can have cumulative effects on people," said Dana Rose Garfin, one of the paper's authors. "More prior indirect exposures are associated with higher stress responses following subsequent traumatic events."
Garfin, E. Alison Holman and Roxane Cohen Silver used survey results from residents of metropolitan Boston and New York City collected within weeks of the Marathon bombing to examine the relationship between how they responded to the attack and their media-based exposure to three previous traumatic events: the Sept. 11, 2001, terrorist attacks, Superstorm Sandy and the Sandy Hook Elementary School shooting.
"We were able to specifically explore the accumulation of exposure to collective disasters," Silver said. "We looked at three different, collective events to which people on the East Coast--and in particular New York and Boston--have been exposed."
The researchers looked at levels of acute stress in Boston and New York residents within a month after the marathon bombing. The Boston residents were much closer to that act of terrorism, but the researchers did not find that proximity necessarily correlated with higher stress levels. According to their report, New Yorkers already had somewhat heightened stress levels, due to their exposure to Superstorm Sandy, 9/11 and the Sandy Hook shooting, making their responses to the Marathon bombing comparable to those of Bostonians.
These findings do not imply that merely reading one article or watching a single program about a community trauma will necessarily increase stress. The research team's first paper found that acute stress symptoms increased as the number of hours per day of bombing-related media exposure in the week following the bombing increased. People who reported three or more hours per day of media exposure reported higher stress symptoms than those who reported less than one hour per day, and individuals who reported six or more hours a day reported the highest levels of symptoms.
Their latest paper also notes that the effects of cumulative indirect trauma exposure aren't universal.
"There's variability in how this happens," Holman said. "And that's another research question that has to be addressed--to understand what leads to those differences, why some people have sensitivities and others don't."
There are other limits on the findings. The data were correlational--they showed a relationship between increased media exposure to traumatic events and the development of stress symptoms, but they don't provide a direct causal link. Still, based on the evidence the researchers have reviewed thus far, coupled with the findings from a similar study they conducted about exposure to media after the 9/11 attacks, the team members have recommendations for news consumers.
"My recommendation is to turn off the TV and not expose yourself too much through social media or other media sources," Holman said. "Find out what you need to know from the news, but don't overexpose yourself."
Garfin emphasized that overexposure is the key factor.
"I wouldn't say don't stay informed or tune out the news," she said. "It's the repeated exposure to things, which probably isn't giving you new information. We're not saying turn off the TV totally. Stay informed, then go on with your daily life."
The researchers are likely to yield much more in the way of results on the topic. The latest paper represents the first wave of data collection they performed. There are four more following. Their next article, they said, will examine how specific types of media--such as television or social media--are associated with acute stress levels.
-- Robert J. Margetta,
Investigators
Dana Rose Garfin
Ellen Holman
Roxane Silver
Responding to terror (again): A study of the Boston Marathon bombing
Media exposure to prior tragedies may sensitize people to new disasters
The city of Boston endured one of the worst terrorist attacks on U.S. soil in April 2013, when two pressure-cooker bombs exploded near the finish line of the Boston Marathon. While emergency workers responded to the chaos and law enforcement agencies began a manhunt for the perpetrators, Americans fixed their attention to television screens, Internet news sites and forums, and Twitter, Facebook and other social media.
In doing so, some of those people may have been raising their acute stress levels, with a corresponding increase in symptoms such as difficulty sleeping, a sense of emotional numbness, or re-experiencing their trauma. Such responses, exhibited shortly after exposure to a trauma, have been linked with long-term negative health effects.
A trio of researchers in psychology and social behavior and nursing science at the University of California (UC), Irvine--supported by the Social Psychology Program in the National Science Foundation's (NSF) Social, Behavioral and Economic Sciences Directorate--released a paper last year finding that for some individuals, intense exposure to the Boston marathon bombing through media coverage could be associated with more stress symptoms than those who had direct exposure to the attack. Their latest research article, published this month, finds that the likelihood of those symptoms developing also increases with multiple exposures to prior trauma.
In other words, the more hours you spend following disasters and tragedies in the media, the more sensitized you may become.
"Media-based exposure to these large, collective traumas--these community disasters--can have cumulative effects on people," said Dana Rose Garfin, one of the paper's authors. "More prior indirect exposures are associated with higher stress responses following subsequent traumatic events."
Garfin, E. Alison Holman and Roxane Cohen Silver used survey results from residents of metropolitan Boston and New York City collected within weeks of the Marathon bombing to examine the relationship between how they responded to the attack and their media-based exposure to three previous traumatic events: the Sept. 11, 2001, terrorist attacks, Superstorm Sandy and the Sandy Hook Elementary School shooting.
"We were able to specifically explore the accumulation of exposure to collective disasters," Silver said. "We looked at three different, collective events to which people on the East Coast--and in particular New York and Boston--have been exposed."
The researchers looked at levels of acute stress in Boston and New York residents within a month after the marathon bombing. The Boston residents were much closer to that act of terrorism, but the researchers did not find that proximity necessarily correlated with higher stress levels. According to their report, New Yorkers already had somewhat heightened stress levels, due to their exposure to Superstorm Sandy, 9/11 and the Sandy Hook shooting, making their responses to the Marathon bombing comparable to those of Bostonians.
These findings do not imply that merely reading one article or watching a single program about a community trauma will necessarily increase stress. The research team's first paper found that acute stress symptoms increased as the number of hours per day of bombing-related media exposure in the week following the bombing increased. People who reported three or more hours per day of media exposure reported higher stress symptoms than those who reported less than one hour per day, and individuals who reported six or more hours a day reported the highest levels of symptoms.
Their latest paper also notes that the effects of cumulative indirect trauma exposure aren't universal.
"There's variability in how this happens," Holman said. "And that's another research question that has to be addressed--to understand what leads to those differences, why some people have sensitivities and others don't."
There are other limits on the findings. The data were correlational--they showed a relationship between increased media exposure to traumatic events and the development of stress symptoms, but they don't provide a direct causal link. Still, based on the evidence the researchers have reviewed thus far, coupled with the findings from a similar study they conducted about exposure to media after the 9/11 attacks, the team members have recommendations for news consumers.
"My recommendation is to turn off the TV and not expose yourself too much through social media or other media sources," Holman said. "Find out what you need to know from the news, but don't overexpose yourself."
Garfin emphasized that overexposure is the key factor.
"I wouldn't say don't stay informed or tune out the news," she said. "It's the repeated exposure to things, which probably isn't giving you new information. We're not saying turn off the TV totally. Stay informed, then go on with your daily life."
The researchers are likely to yield much more in the way of results on the topic. The latest paper represents the first wave of data collection they performed. There are four more following. Their next article, they said, will examine how specific types of media--such as television or social media--are associated with acute stress levels.
-- Robert J. Margetta,
Investigators
Dana Rose Garfin
Ellen Holman
Roxane Silver
Subscribe to:
Posts (Atom)