New research from the University of Calgary's Hotchkiss Brain Institute (HBI) shows that using a CT (computerised tomography) scan, doctors can predict if patients who have had a transient ischemic attack (TIA) or minor stroke, with neurological symptoms such as weakness or speech issues, are at risk for another more severe stroke. This vital information can help doctors decide if stronger medications should be used to prevent future episodes, or if a patient can be safely sent home. Currently, doctors can use a brain MRI (magnetic resonance imaging) scan to predict ...

In the crash-car derby between heavy and light isotopes vying for the coolest spots as magma turns to solid rock, weightier isotopes have an edge, research led by Case Western Reserve University shows. This tiny detail may offer clues to how igneous rocks form. As molten rock cools along a gradient, atoms want to move towards the cool end. This happens because hotter atoms move faster than cooler atoms and, therefore, hotter atoms move to the cool region faster than the cooler atoms move to the hot region. Although all isotopes of the same element want to move towards ...

From spaghetti-like sea anemones to blobby jellyfish to filigreed oak trees, each species in nature is characterized by a unique size and shape. But the evolutionary changes that produce the seemingly limitless diversity of shapes and sizes of organisms on Earth largely remains a mystery. Nevertheless, a better understanding of how cells grow and enable organisms to assume their characteristic sizes and shapes could shed light on diseases that involve cell growth, including cancer and diabetes. Providing new information about the evolution of the diversity of sizes and ...

For decades, scientists have understood that there is a genetic component to intelligence, but a new Harvard study has found both that most of the genes thought to be linked to intelligence are probably not in fact related to it, and identifying intelligence's specific genetic roots may still be a long way off. Led by David I. Laibson '88, the Robert I. Goldman Professor of Economics, and Christopher F. Chabris '88, PhD '99, Assistant Professor of Psychology at Union College, a team of researchers examined a dozen genes using large data sets that included both intelligence ...

PHILADELPHIA -- Would you be able to find an automated external defibrillator if someone's life depended on it? Despite an estimated one million AEDs scattered around the United States, the answer, all too often when people suffer sudden cardiac arrests, is no. In a Perspective piece published online this week in the journal Circulation: Cardiovascular Quality Outcomes, two researchers from the Perelman School of Medicine at the University of Pennsylvania outline the tremendous potential associated with greater utilization of AEDs in public places and a method to find ...

LOS ALAMOS, New Mexico, February 24, 2012—A multinational team of scientists has developed a process for creating glass-based, inorganic light-emitting diodes (LEDs) that produce light in the ultraviolet range. The work, reported this week in the online Nature Communications, is a step toward biomedical devices with active components made from nanostructured systems. LEDs based on solution-processed inorganic nanocrystals have promise for use in environmental and biomedical diagnostics, because they are cheap to produce, robust, and chemically stable. But ...

CLEMSON — A study of X-rays emitted a long time ago in a galaxy far, far away has unmasked a stellar mass black hole in Andromeda, a spiral galaxy about 2.6 million light-years from Earth. Two Clemson University researchers joined an an international team of astronomers, including scientists at Germany's Max Planck Institute for Extraterrestrial Physics, in publishing their findings in a pair of scientific journals this week. Scientists had suspected the black hole was possible since late 2009 when an X-ray satellite observatory operated by the Max Planck Institute ...

NEW YORK – February 24, 2012 – A forthcoming article in the Journal of Consumer Research by Professor Michel Tuan Pham, Kravis Professor of Business, Marketing, Columbia Business School; Leonard Lee, Associate Professor, Marketing, Columbia Business School; and Andrew Stephen, PhD '09, currently Assistant Professor of Business Administration, Joseph M. Katz Graduate School of Business, University of Pittsburgh, finds that a higher trust in feelings may result in more accurate predictions about a variety of future events. The research will also be featured in Columbia Business ...

The gold standard for nanotechnology is nature's own proteins. These biomolecular nanomachines – macromolecules forged from peptide chains of amino acids - are able to fold themselves into a dazzling multitude of shapes and forms that enable them to carry out an equally dazzling multitude of functions fundamental to life. As important as protein folding is to virtually all biological systems, the mechanisms behind this process have remained a mystery. The fog, however, is being lifted. A team of researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley ...

Patients with heart disease who took cholesterol-lowering statins were significantly less likely to develop depression than those who did not, in a study by Mary Whooley, MD, a physician at the San Francisco VA Medical Center and a professor of medicine at the University of California, San Francisco. The study was published electronically in the Journal of Clinical Psychiatry (February 21, 2012). Whooley and her research team evaluated 965 heart disease patients for depression, and found that the patients who were on statins were significantly less likely to be clinically ...

NEW YORK – February 24, 2012 – A recent study in the Review of Financial Studies proposes a new, valuation-based measure of equity market segmentation. Equity market segmentation occurs when stocks of similar risk in different countries are priced differently. The study, by Columbia Business School Professor Geert Bekaert, Chazen Senior Scholar at The Jerome A. Chazen Institute of International Business at Columbia Business School and the Leon G. Cooperman Professor of Finance and Economics, uncovers the factors that cause variation in market segmentation, both through ...

Prehistoric Eurasian nomads are commonly perceived as horse riding bandits who utilized their mobility and military skill to antagonize ancient civilizations such as the Chinese, Persians, and Greeks. Although some historical accounts may support this view, a new article by Dr. Michael Frachetti (Washington University, St. Louis) illustrates a considerably different image of prehistoric pastoralist societies and their impact on world civilizations more than 5000 years ago. In the article, recently published in the February issue of Current Anthropology, Frachetti argues ...

Boulder, Colorado, USA - Linear dunes, widespread on Earth and Saturn's moon, Titan, are generally considered to have been formed by deposits of windblown sand. It has been speculated for some time that some linear dunes may have formed by "wind-rift" erosion, but this model has commonly been rejected due to lack of sufficient evidence. Now, new research supported by China's NSF and published this week in GSA BULLETIN indicates that erosional origin models should not be ruled out. The linear dunes in China's Qaidam Basin have been proposed to have formed as self-extending ...

Boulder, CO, USA - New GSA BULLETIN science published online 24 Feb. includes work on the Chugach Metamorphic Complex of southern Alaska; news and data from the first non-Russian science team to make a helicopter over-flight of Shiveluch volcano in Kamchatka, Russia, after its large 2005 eruption; and a study by a team from the Lamont-Doherty Earth Observatory that proposes a new calibration model for the Eocene segment of the Geomagnetic Polarity Time Scale (GPTS). Large-scale, short-lived metamorphism, deformation, and magmatism in the Chugach metamorphic complex, ...

A UCLA-led group of researchers tracing disparities in life expectancy between blacks and whites in the U.S. has found that white males live about seven years longer on average than African American men and that white women live more than five years longer than their black counterparts. But when comparing life expectancy on a state-by-state basis, the researchers made a surprising discovery: In those states in which the disparities were smallest, the differences often were not the result of African Americans living longer but of whites dying younger than the national ...

Children with autism spectrum disorders who also have serious behavioral problems responded better to medication combined with training for their parents than to treatment with medication alone, Yale researchers and their colleagues report in the February issue of Journal of the American Academy of Child & Adolescent Psychiatry. "Serious behavioral problems interfere with everyday living for children and their families," said senior author on the study Lawrence Scahill, professor at Yale University School of Nursing and the Child Study Center. "Decreasing these serious ...

Here's a riddle: What's the difference between a tick and a lion? The answer used to be that a tick is a parasite and the lion is a predator. But now those definitions don't seem as secure as they once did. A tick also hunts its prey, following vapor trails of carbon dioxide, and consumes host tissues (blood is considered a tissue), so at least in terms of its interactions with other creatures, it is like a lion — a very small, eight-legged lion. Ecologists are increasingly finding it useful to think of parasites, such as ticks, as micro-predators and have been mining ...

Business bankruptcy filings, such as those associated with Washington Mutual and Eastman Kodak, tend to make front page news. Every day, though, and with far less fanfare, consumers across the country are seeking debt relief through personal bankruptcy. Los Angeles bankruptcy lawyer Hamid Soleimanian is now offering free consultations for all bankruptcy cases. As many as 1.36 million Americans filed for bankruptcy during 2011, according to the U.S. Bankruptcy Court. In fact, business bankruptcies have fallen by as much as 20 percent, while total filings are down just ...

When tickets move beyond fines or traffic school, drivers are going to be in for a DMV hearings and trials that are going to require some extra help. If a suspended driver's license is looming over an individual's head, they have only days to act to get the legal defense that they need to steer clear of such severe penalties. This is why the suspended license lawyer at Traffic Ticket Justice is now offering legal assistance for all cases involving suspended licenses. Whether a driver has only been on the road for a few years or is a veteran CDL holder, it may feel as ...

Genomes are catalogs of hereditary information that determine whether an organism becomes a plant, animal, fungus or microbe, and whether the organism is adapted to its surroundings. Determining the sequence of DNA within genomes is crucial to human medicine, crop genetics, biotechnology, forensic science, threatened species management, and evolutionary studies. The last 5 years have witnessed tremendous advances in DNA sequencing technologies, and it is now possible to sequence millions of fragments of DNA in a single analysis, and at a fraction of their previous cost. ...

New findings from an international team of researchers show that most neandertals in Europe died off around 50,000 years ago. The previously held view of a Europe populated by a stable neandertal population for hundreds of thousands of years up until modern humans arrived must therefore be revised. This new perspective on the neandertals comes from a study of ancient DNA published today in Molecular Biology and Evolution. The results indicate that most neandertals in Europe died off as early as 50,000 years ago. After that, a small group of neandertals recolonised central ...

For the first time, Massachusetts General Hospital (MGH) researchers have isolated egg-producing stem cells from the ovaries of reproductive age women and shown these cells can produce what appear to be normal egg cells or oocytes. In the March issue of Nature Medicine, the team from the Vincent Center for Reproductive Biology at MGH reports the latest follow-up study to their now-landmark 2004 Nature paper that first suggested female mammals continue producing egg cells into adulthood. "The primary objective of the current study was to prove that oocyte-producing stem ...

Energy efficiency experts at the University of East Anglia (UEA) are calling for ambitious new targets to reduce energy demand across the European Union. In a report published today by the Build with CaRe consortium, the researchers propose a new EU target of a 40 per cent reduction in primary energy demand by 2050. The existing target is a 20 per cent improvement in energy efficiency by 2020, but the EU is currently on track to achieve only half of this. The report by Dr Bruce Tofield and Martin Ingham, associate consultants at UEA's Adapt Low Carbon Group concludes ...

Researchers have identified an elusive gene responsible for Thrombocytopenia with Absent Radii (TAR), a rare inherited blood and skeletal disorder. As a result, this research is now being transformed into a medical test that allows prenatal diagnosis and genetic counselling in affected families. The team used genetic sequencing to discover that TAR results from low levels of the protein called Y14. They found that the syndrome occurs by a unique inherited mechanism. Platelets are the second most abundant cell in the blood. Their main task is to survey the blood vessel ...

Ancient manuscripts written by Arabic scholars can provide valuable meteorological information to help modern scientists reconstruct the climate of the past, a new study has revealed. The research, published in Weather, analyses the writings of scholars, historians and diarists in Iraq during the Islamic Golden Age between 816-1009 AD for evidence of abnormal weather patterns. Reconstructing climates from the past provides historical comparison to modern weather events and valuable context for climate change. In the natural world trees, ice cores and coral provide evidence ...