New research from wildlife ecologists at Michigan Technological University indicates that white-tailed deer may be making the soil in their preferred winter homes unfit to grow the very trees that protect them there. Bryan Murray, a PhD candidate at Michigan Tech, and two faculty members, Professor Christopher Webster and Assistant Professor Joseph Bump, studied the effects on soil of the nitrogen-rich waste that white-tailed deer leave among stands of eastern hemlock, which are among their favorite wintering grounds in the harsh, snowy climate of northern Michigan. ...

CAMBRIDGE, MA -- In 2010, in the journal Nature, a pair of physicists at the Santa Fe Institute showed that when the population of a city doubles, economic productivity goes up by an average of 130 percent. Not only does total productivity increase with increased population, but so does per-capita productivity. In the latest issue of Nature Communications, researchers from the MIT Media Laboratory's Human Dynamics Lab propose a new explanation for that "superlinear scaling": Increases in urban population density give residents greater opportunity for face-to-face interaction. The ...

To increase their share of leadership positions, women are expected to tick a range of boxes – usually demonstrating improved negotiation skills, networking strengths and the ability to develop a strategic career ladder. "But even these skills are not enough," maintains Professor Isabell Welpe of TUM's Chair for Strategy and Organization. "They ignore the fact that there are stereotypes that on a subconscious level play a decisive role in the assessment of high achievers. Leaders should be assertive, dominant and hard-lined; women are seen as mediators, friendly, social." Economic ...

New research from McMaster University suggests women can remember faces better than men, in part because they spend more time studying features without even knowing it, and a technique researchers say can help improve anyone's memories. The findings help to answer long-standing questions about why some people can remember faces easily while others quickly forget someone they've just met. "The way we move our eyes across a new individual's face affects our ability to recognize that individual later," explains Jennifer Heisz, a research fellow at the Rotman Institute ...

If people are unable to perceive their own errors as they complete a routine, simple task, their skill will decline over time, Johns Hopkins researchers have found — but not for the reasons scientists assumed. The researchers report that the human brain does not passively forget our good techniques, but chooses to put aside what it has learned. The term "motor memories" may conjure images of childhood road trips, but in fact it refers to the reason why we're able to smoothly perform everyday physical tasks. The amount of force needed to lift an empty glass versus a full ...

(INDIANAPOLIS) A cross-disciplinary collaboration of researchers in the School of Science at Indiana University-Purdue University Indianapolis (IUPUI) explores the neural synchrony between circuits in the brain and their behavior under simulated drug addiction. The two-year study could have broad implications for treating addiction and understanding brain function in conditions such as Parkinson's disease. Advanced mathematical models coupled with extensive laboratory testing revealed recurrent stimulant injections in rodents resulted in neural circuits that could easily ...

As antiretroviral drugs that treat HIV have become more commonplace, the incidence of Kaposi's sarcoma, a type of cancer linked to AIDS, has decreased in the United States. The disease, however, remains prevalent in sub-Saharan Africa, where poor access to medical care and lab tests only compound the problem. Now, Cornell University engineers have created a new smartphone-based system, consisting of a plug-in optical accessory and disposable microfluidic chips, for in-the-field detection of the herpes virus that causes Kaposi's. "The accessory provides an ultraportable ...

WINSTON-SALEM, N.C., – June 3, 2013 – Scientists, like Buddhist monks and Zen masters, have known for years that meditation can reduce anxiety, but not how. Scientists at Wake Forest Baptist Medical Center, however, have succeeded in identifying the brain functions involved. "Although we've known that meditation can reduce anxiety, we hadn't identified the specific brain mechanisms involved in relieving anxiety in healthy individuals," said Fadel Zeidan, Ph.D., postdoctoral research fellow in neurobiology and anatomy at Wake Forest Baptist and lead author of the study. ...

Jerusalem, June 4, 2013 -- The first amphibian to have been officially declared extinct by the International Union for Conservation of Nature (IUCN) has been rediscovered in the north of Israel after some 60 years and turns out to be a unique "living fossil," without close relatives among other living frogs. The Hula painted frog was catalogued within the Discoglossus group when it was first discovered in the Hula Valley of Israel in the early 1940s. The frog was thought to have disappeared following the drying up of the Hula Lake at the end of the 1950s, and was declared ...

From its orbit around the Earth, the NASA-NOAA Suomi National Polar-orbiting Partnership satellite or Suomi NPP satellite, captured a night-time image of California's Powerhouse Fire. The Suomi NPP satellite carries an instrument so sensitive to low light levels that it can detect wildfires in the middle of the night. The Day/Night band on Suomi/NPP produces Night-Time visible imagery using illumination from natural (the moon, forest fires) and man-made sources (city lights, gas flares). This image was taken during the early morning hours of June 3, 2013. Suomi NPP ...

WASHINGTON, June 4, 2013—It's not easy going green. For home lighting applications, organic light emitting diodes (OLEDs) hold the promise of being both environmentally friendly and versatile. Though not as efficient as regular light-emitting diodes (LEDs), they offer a wider range of material choices and are more energy efficient than traditional lights. OLEDs can also be applied to flexible surfaces, which may lead to lights or television displays that can be rolled up and stowed in a pocket. A promising line of research involves combining the OLEDs with inorganic ...

A new study shows compelling evidence that associations between cognitive ability and cortical grey matter in old age can largely be accounted for by cognitive ability in childhood. The joint study by the Montreal Neurological Institute and Hospital, The Neuro, McGill University and the University of Edinburgh, UK was published today, June 4 in Molecular Psychiatry. It has long been thought that preserving brain cortical thickness was a determining factor in superior cognitive ability in old age; however the rare availability of childhood cognitive scores reveals other ...

WASHINGTON, June 4, 2013—Strawberry lovers rejoice: the days of unpacking your luscious berries from the refrigerator only to find them sprouting wispy goatees of mold may be numbered. A research team from the U.S. Department of Agriculture's (USDA) Food Components and Health Laboratory in Beltsville, Md., and Sensor Electronic Technology, Inc. (SETi) in Columbia, S.C., has demonstrated that low irradiance ultra-violet (UV) light directed at strawberries over long exposure periods at low temperature and very high humidity—typical home refrigerator conditions—delays spoilage. ...

NASA's MASTER instrument captured this infrared composite image of California's Powerhouse Fire. The MASTER image shows the intensity of the heat from the fire in different colors. The MASTER instrument, also known as the MODIS/ASTER Airborne Simulator that was developed for the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Moderate Resolution Imaging Spectroradiometer (MODIS) projects. ASTER and MODIS are both spaceborne imaging instruments aboard the Terra satellite. This image is a color composite of three infrared bands from the MASTER ...

Johns Hopkins researchers have documented huge and somewhat puzzling interstate variations in the percentage of emergency versus elective bowel surgeries. Figuring out precisely why the differences occur is critical, they say, because people forced to undergo emergency procedures are far more likely to die from their operations than those able to plan ahead for them. "With surgery, just as with most things in life, planning under optimal conditions leads to a better result," says study leader Adil H. Haider, M.D., M.P.H., an associate professor of surgery at the Johns ...

BEER-SHEVA, Israel…June 4, 2013 — Chronic exposure to rocket attacks launched from the Gaza Strip into Israel is causing an increase in severe adolescent violence, according to a new study by Ben-Gurion University of the Negev (BGU) researchers. The study, published in the Journal of the American Academy of Child and Adolescent Psychiatry (JAACAP), followed 362 Israeli adolescents from the southwestern Negev from 2008 to 2011, and conducted annual assessments of exposure to rocket attacks, symptoms of depression and anxiety, as well as acts of violence. "This is the ...

New Rochelle, NY, June 4, 2013—The composition of breast milk varies from mother to mother, and genetic factors may affect the levels of protective components in breast milk that could influence a newborn's outcomes. The potential to perform genomic studies on breast milk samples is explored in a Review article in Breastfeeding Medicine, the Official Journal of the Academy of Breastfeeding Medicine, published by Mary Ann Liebert, Inc., publishers. The article is available free on the Breastfeeding Medicine website at http://www.liebertpub.com/bfm. Kelley Baumgartel and ...

Prevention is often the best medicine, not only for physical health, but also public health, according to researchers at Penn State and Iowa State University. According to the researchers, young adults reduce their overall prescription drug misuse up to 65 percent if they are part of a community-based prevention effort while still in middle school. The reduced substance use is significant considering the dramatic increase in prescription drug abuse, said Richard Spoth, director of the Partnerships in Prevention Science Institute at Iowa State. The research, published ...

LOS ALAMOS, New Mexico, June 4, 2013—Los Alamos National Laboratory scientists have designed a new type of nanostructured-carbon-based catalyst that could pave the way for reliable, economical next-generation batteries and alkaline fuel cells, providing for practical use of wind- and solar-powered electricity, as well as enhanced hybrid electric vehicles. In a paper appearing recently in Nature Communications, Los Alamos researchers Hoon T. Chung, Piotr Zelenay and Jong H. Won, the latter now at the Korea Basic Science Institute, describe a new type of nitrogen-doped ...

ROCHESTER, Minn. -- Low-dose intravenous infusions of ketamine, a general anesthetic used in minor surgeries, given over a long period are an effective treatment for depression, Mayo Clinic researchers found. The study is published in the Journal of Psychopharmacology. About a decade ago researchers discovered that ketamine had the potential to alleviate severe depression. However, ketamine also can have serious psychiatric side effects, so studies have been exploring the safest way to use it. "It's surprising both that it works and how rapidly it has effects," says ...

Cartilage injuries are difficult to repair. Current surgical options generally involve taking a piece from another part of the injured joint and patching over the damaged area, but this approach involves damaging healthy cartilage, and a person's cartilage may still deteriorate with age. Bioengineers are interested in finding innovative ways to grow new cartilage from a patient's own stem cells, and, thanks to a new study from the University of Pennsylvania, such a treatment is a step closer to reality. The research was conducted by associate professor Jason Burdick ...

Obese teenagers who reduced their body mass index (BMI) by 8 percent or more had improvements in insulin sensitivity, an important metabolic factor related to the later development of type 2 diabetes. The teens followed a family-based, lifestyle-modification weight loss program that offers the potential to become a broader model. BMI is a measure of body weight adjusted for height. "This threshold effect that occurs at 8 percent suggests that obese adolescents don't need to lose enormous amounts of weight to achieve improvements," said pediatric endocrinologist Lorraine ...

ANN ARBOR—Zebrafish with very weak muscles helped scientists decode the elusive genetic mutation responsible for Native American myopathy, a rare, hereditary muscle disease that afflicts Native Americans in North Carolina. Scientists led by John Kuwada, professor of molecular, cellular and developmental biology at the University of Michigan, and Hiromi Hirata of the National Institute of Genetics in Japan originally identified the gene in mutant zebrafish that exhibited severe muscle weakness. Native American myopathy causes muscle weakness from birth and other severe ...

COLUMBIA, Mo. –Stories often appear in health communication in order to encourage individuals to change behaviors, such as smoking or not wearing sunscreen. A University of Missouri researcher studied how stories influence patients' decision-making when behavior change is not the desired outcome of the health communication. "Patient stories can be very persuasive, and people tend to seek stories from others when they make health decisions," said Victoria Shaffer, an assistant professor of health sciences and psychological sciences at MU. "We were concerned about whether ...

More than a third of marriages between 2005 and 2012 began online, according to new research at the University of Chicago, which also found that online couples have happier, longer marriages. Although the study did not determine why relationships that started online were more successful, the reasons may include the strong motivations of online daters, the availability of advance screening, and the sheer volume of opportunities online. "These data suggest that the Internet may be altering the dynamics and outcomes of marriage itself," said the study's lead author, ...