MANHATTAN, KAN. -- A Kansas State University chemical engineer has discovered that a new member of the ultrathin materials family has great potential to improve electronic and thermal devices. Vikas Berry, William H. Honstead professor of chemical engineering, and his research team have studied a new three-atom-thick material -- molybdenum disulfide -- and found that manipulating it with gold atoms improves its electrical characteristics. Their research appears in a recent issue of Nano Letters. The research may advance transistors, photodetectors, sensors and thermally ...

Research from North Carolina State University identified factors that cause construction site managers to schedule more time than necessary for specific tasks. Understanding these factors and whether they can be reduced or eliminated could help the industry complete construction projects more quickly. At issue is a construction planning concept called a time buffer. A time buffer is the difference between how long it should take to accomplish a task based on optimum productivity, and how long you think it will take in the real world. On any job, things can go wrong; bad ...

Researchers have found that apoptosis, a natural process of programmed cell death, can reactivate latent herpesviruses in the dying cell. The results of their research, which could have broad clinical significance since many cancer chemotherapies cause apoptosis, was published ahead of print in the Journal of Virology. Human herpesviruses (HHV) are linked to a range of childhood and adult diseases, including chickenpox, mononucleosis, cold sores, and genital sores, and are of a particular concern for patients who are immunosuppressed due cancer or AIDS. Some HHV types ...

During his time in Daniel Morse's lab at the University of California Santa Barbara, USA, PhD student Daniel DeMartini has seen many Doryteuthis opalescens squid pass through the lab's doors. These squid provide DeMartini with a steady supply of the iridocyte cells that are responsible for the squid's shimmering opal-like markings. Iridocytes are found in many cephalopods, but what makes those of D. opalescens so special is their ability to adapt and produce a rainbow of different colours from the same cell. Most iridocytes are found in patches across the squid's body but ...

WASHINGTON, DC (September 5, 2013) -- A new analysis by researchers at the George Washington University School of Public Health and Health Services (SPHHS) examines the relationship between health information laws and health system improvements for children and adolescents under Medicaid's Early and Periodic Screening, Diagnosis and Treatment (EPSDT) benefit. EPSDT ensures comprehensive coverage of children's health care needs, and its benefits are of particular importance for children and adolescents with physical and mental health conditions that can lead to lifelong ...

One-time entry authentication methods, such as passwords, iris scanners and fingerprint recognition are fine for simple entry whether to a protected building or a private web page. But, a continuous biometric system is needed in some circumstances such as authenticating drivers of vehicles carrying valuable commodities and money, and even public transport vehicles and taxis. Now, such a system based on scanning the driver's brain waves described in a forthcoming issue of the International Journal of Biometrics could make hijacks of such vehicles a thing of the past. Isao ...

New Rochelle, NY, September 4, 2013—Despite tens of thousands of studies in the literature on the thyroid gland, thyroid hormone, and thyroid disease, lack of standardization in study design makes it difficult to compare the results and apply them to the development of improved diagnostic and treatment approaches. A new report from the American Thyroid Association's Taskforce on Approaches and Strategies to Investigate Thyroid Hormone Economy includes 70 specific recommendations and accompanying commentaries on a range of topics. The report is available free online on the ...

Researchers in China have developed a mathematical model that could help engineers design a flexible vehicle-arrest system for stopping cars involved in criminal activity or terrorism, such as suspect car bombers attempting break through a check point, without wrecking the car or killing the occupants. Writing in a forthcoming issue of the International Journal of Vehicle Design, Pak Kin Wong and colleagues in the Department of Electromechanical Engineering at the University of Macau, in Taipa, Macao, explain how common vehicle-arrest systems used by law enforcement, ...

CAMBRIDGE, MA -- In May 2009, the Mars rover Spirit cracked through a crusty layer of Martian topsoil, sinking into softer underlying sand. The unexpected sand trap permanently mired the vehicle, despite months of remote maneuvering by NASA engineers to attempt to free the rover. The mission mishap may have been prevented, says MIT's Karl Iagnemma, by a better understanding of terramechanics — the interaction between vehicles and deformable terrain. Iagnemma says scientists have a pretty good understanding of how soils interact with vehicles that weigh more than 2,000 ...

Two leading neurology researchers have proposed a theory that could unify scientists' thinking about several neurodegenerative diseases and suggest therapeutic strategies to combat them. The theory and backing for it are described in Nature. Mathias Jucker and Lary Walker outline the emerging concept that many of the brain diseases associated with aging, such as Alzheimer's and Parkinson's, are caused by specific proteins that misfold and aggregate into harmful seeds. These seeds behave very much like the pathogenic agents known as prions, which cause mad cow disease, ...

A joint Harvard-Smithsonian study released today in the journal PLOS ONE reveals how much -- and how little -- Northeastern forests have changed after centuries of intensive land use. A hike through today's woods will reveal the same types of trees that a colonial settler would have encountered 400 years ago. But the similarities end there. Jonathan Thompson, research associate at the Smithsonian Conservation Biology Institute and lead author of the new study, explains, "If you only looked at a tree species list, you'd have the impression that Northeast forests haven't ...

A quarter of the mature female tiger sharks plying the waters around the remote coral atolls of the Northwestern Hawaiian Islands decamp for the populated Main Hawaiian Islands in the late summer and fall, swimming as far as 2,500 kilometers (1,500 miles) according to new research from University of Florida and the University of Hawaii. Their report is scheduled for publication in the November 2013 issue of Ecological Society of America's journal Ecology. The authors' manuscript is available as a preprint. "When we think of animal migrations, we tend to think of all individuals ...

CORVALLIS, Ore. – Overgrazing by millions of sheep and goats is the primary cause of degraded land in the Mongolian Steppe, one of the largest remaining grassland ecosystems in the world, Oregon State University researchers say in a new report. Using a new satellite-based vegetation monitoring system, researchers found that about 12 percent of the biomass has disappeared in this country that's more than twice the size of Texas, and 70 percent of the grassland ecosystem is now considered degraded. The findings were published in Global Change Biology. Overgrazing accounts ...

An international team of scientists, including University of Colorado School of Medicine and Children's Hospital Colorado researchers, has discovered a new disease related to an inability to process Vitamin B12. The disorder is rare but can be devastating. "Some people with rare inherited conditions cannot process vitamin B 12 properly," says CU researcher Tamim Shaikh, PhD, a geneticist and senior author of a paper about the new disease. "These individuals can end up having serious health problems, including developmental delay, epilepsy, anemia, stroke, psychosis and ...

URBANA, Ill. - Because weanling pigs do not tolerate great quantities of soybean meal in the diet, alternative sources of protein must be used. Blood products, such as blood meal and plasma protein, are common ingredients in weanling pig diets and are considered high-quality sources of amino acids. Researchers at the University of Illinois have determined the amino acid digestibility of five blood products produced in the U.S. to provide swine producers with guidance for the use of these products in formulating diets. "Blood meal usually is considered a good source of ...

Although microbes that live in the so-called "dark ocean"—below a depth of some 600 feet where light doesn't penetrate—may not absorb enough carbon to curtail global warming, they do absorb considerable amounts of carbon and merit further study. That is one of the findings of a paper published in the International Society of Microbial Ecology (ISME) Journal by Tim Mattes, associate professor of civil and environmental engineering in the University of Iowa College of Engineering, and his colleagues. Mattes says that while many people are familiar with the concept of ...

Even before they are born, babies accumulate changes in their DNA through a process called DNA methylation that may interfere with gene expression, and in turn, their health as they grow up. But until now it's been unclear just how long these changes during the prenatal period persist. In a new study, researchers at the Columbia Center for Children's Environmental Health at the Mailman School of Public Health establish that signs of DNA methylation persist through early childhood, suggesting the factors that influence these changes during or before pregnancy could have ...

DURHAM, N.C. -- By studying hibernation, a Duke University team is providing a window into why humans sleep. Observations of a little-known primate called the fat-tailed dwarf lemur in captivity and the wild has revealed that it goes for days without the deepest part of sleep during its winter hibernation season. The findings support the idea that sleep plays a role in regulating body temperature and metabolism. Despite decades of research, why we sleep is still a mystery. Theories range from conserving energy, to processing information and memories, to removing toxins ...

MINNEAPOLIS -- New research suggests that men who exercise vigorously as young adults may reduce their risk of developing epilepsy later in life. The study is published in the September 4, 2013, online issue of Neurology®, the medical journal of the American Academy of Neurology. Epilepsy is a brain disease that causes repeated seizures over time. "There are a host of ways exercise has been shown to benefit the brain and reduce the risk of brain diseases," said study author Elinor Ben-Menachem, PhD, MD, with the University of Gothenburg in Sweden and an associate member ...

COLUMBUS, Ohio -- College biology textbooks cater to the needs of pre-med majors and not those of the majority of students who take introductory science classes, a new study reveals. A text analysis of eight commonly used biology textbooks found that all of them closely follow the curriculum suggested for pre-med students by the Medical College Admission Test (MCAT). That means the texts put a heavy emphasis on molecular and cellular biology, while giving less attention to the big issues that have more relevance to students who don't plan on being medical doctors, ...

University of Utah bioengineers discovered our understanding of language may depend more heavily on vision than previously thought: under the right conditions, what you see can override what you hear. These findings suggest artificial hearing devices and speech-recognition software could benefit from a camera, not just a microphone. "For the first time, we were able to link the auditory signal in the brain to what a person said they heard when what they actually heard was something different. We found vision is influencing the hearing part of the brain to change your ...

Fat-tailed dwarf lemurs are the only primates known to hibernate, and new research suggests their sleep patterns during hibernation are markedly different from those of ground squirrels, which also hibernate at similar temperatures. The results are published September 4 in the open access journal PLOS ONE by Andrew Krystal and colleagues from Duke University School of Medicine and the Duke Lemur Center. During hibernation, dwarf lemurs experience periods of rapid eye movement (REM) sleep at relatively high ambient temperatures, but no non-REM sleep. Ground squirrels, ...

Signs banning smoking may not have as much of an impact on secondhand smoke concentrations as the presence of ashtrays or ashtray equivalents, according to research published September 4 in the open access journal PLOS ONE by Constantine Vardavas from the Harvard School of Public Health and colleagues from other institutions. The authors measured the success of a non-enforced, nationwide smoke-free legislation in Greece by testing levels of secondhand smoke before the ban and for two years afterward. Following the 2010 legislation, secondhand smoke concentrations dropped ...

Forests in the northeastern US have been radically transformed over the last four centuries by human activity, and their relationship with climate factors like rainfall weakened, according to research published September 4 in the open access journal PLOS ONE by Jonathan Thompson and colleagues from the Smithsonian Institution. Though the land use history of the northeastern United States is well documented, its ecological consequences remain poorly understood. Based on more than 300,000 references to individual trees within colonial-era property records, the researchers ...

A new, international study from the Chronic Kidney Disease Prognosis Consortium found that use of blood levels of cystatin C to estimate kidney function—alone or in combination with creatinine—strengthens the association between kidney function and risks of death and end-stage renal disease. The findings, reported in the September 5 edition of the New England Journal of Medicine, suggest that the use of cystatin C as a measurement of kidney function could lead to better staging and risk classification of chronic kidney disease. They also suggest that the measurement ...