The Sun is a magnetically active star. Its activity manifests itself as dark sunspots and bright faculae on its visible surface, as well as violent mass ejections and the acceleration of high-energy particles resulting from the release of magnetic energy in its outer atmosphere. The frequency with which these phenomena occur varies in a somewhat irregular activity cycle of about 11 years, during which the global magnetic field of the Sun reverses. The solar magnetic field and the activity cycle originate in a self-excited dynamo mechanism based upon convective flows and ...

It is widely believed that bone marrow mesenchymal stem cells are highly adherent fibroblastic cells, defined as colony-forming unit-fibroblasts. Nevertheless, a few reports have shown that the non-adherent bone marrow cells can give rise to colony-forming unit-fibroblasts in vitro, and possess a certain differentiation potential. According to a recent study from Dr. Xiaoming Ben and colleagues, non-adherent bone marrow cell-derived mesenchymal stem cells from C57BL/6J mice cultured using the "pour-off" method developed colony-forming unit-fibroblasts, and could be expanded ...

Increased brain cell apoptosis in intrauterine growth-restricted fetal rats is a key reason for unfavorable long-term prognosis of the nervous system. The harmful effects of intrauterine growth restriction on fetal brain development originate in the womb. Therefore, it is difficult to obtain ideal outcomes through postnatal intervention. Taken together, active prenatal intervention is of great importance to the optimal prognosis of the intrauterine growth restricted fetus. Prof. Jing Liu and colleagues from the General Hospital of Beijing Military Command found that taurine ...

Death of neurons in the dorsal raphe nucleus and locus coeruleus is a pathological characteristic of the disease. Previous studies concerning the pathological characteristic of Alzheimer's disease mainly focus on learning and memory-related hippocampus, and less attention has been paid to the locus coeruleus. Noradrenergic neurons in the locus coeruleus can produce norepinephrine that has excitatory effects on the hippocampus and cortex, suggesting that the locus coeruleus has an important role for learning, memory and other cognitive functions. A recent study published ...

A new research study has revealed that the cheetah, the world's fastest land animal, matches and may even anticipate the escape tactics of different prey when hunting, rather than just relying on its speed and agility, as previously thought. The study, which has just been published in the Royal Society Journal Biology Letters was carried out by a team of researchers from Queen's University Belfast, in collaboration with other Institutions in the UK (University of Aberdeen, University of Swansea, Institute of Zoology, Zoological Society of London, University of Oxford), ...

Washington D.C. -- A study published in the September 2013 issue of the Journal of the American Academy of Child and Adolescent Psychiatry found that young adults with an autism spectrum disorder (ASD) have more difficulty transitioning into employment than their peers with different disabilities. Using data from the National Longitudinal Transition Study 2 (NLTS2; a longitudinal nationally-representative survey of youth ages 13-16 years as of December 2000 and receiving special education services), a group of researchers led by Dr. Paul Shattuck of Washington University ...

No two human beings are the same. Although we all possess the same genes, our genetic code varies in many places. And since genes provide the blueprint for all proteins, these variants usually result in numerous differences in protein function. But what impact does this diversity have? Bioinformatics researchers at Rutgers University and the Technische Universitaet Muenchen (TUM) have investigated how protein function is affected by changes at the DNA level. Their findings bring new clarity to the wide range of variants, many of which disturb protein function but have no ...

Leaders of the major world religions can play a key role in preserving biological diversity. A new study carried out by ecologists at the Swedish University of Agricultural Sciences (SLU), among others, indicates that if the world's religious leaders wished to bring about a change, they would be ideally positioned to do so. – Our study investigates how the various religions are distributed around the world and how they overlap areas that are important for global biological diversity, says Grzegorz Mikusinski, a researcher at SLU who directs the project. Our analysis indicates ...

Philadelphia, PA, September 5, 2013 – We live in the most exciting and unsettling period in the history of psychiatry since Freud started talking about sex in public. On the one hand, the American Psychiatric Association has introduced the fifth iteration of the psychiatric diagnostic manual, DSM-V, representing the current best effort of the brightest clinical minds in psychiatry to categorize the enormously complex pattern of human emotional, cognitive, and behavioral problems. On the other hand, in new and profound ways, neuroscience and genetics research in psychiatry ...

ANN ARBOR—University of Michigan researchers today released seven technical reports that together form the most comprehensive Michigan-focused resource on hydraulic fracturing, the controversial natural gas and oil extraction process commonly known as fracking. The studies, totaling nearly 200 pages, examine seven critical topics related to the use of hydraulic fracturing in Michigan, with an emphasis on high-volume methods: technology, geology and hydrogeology, environment and ecology, public health, policy and law, economics, and public perceptions. While considerable ...

A new approach to calculating the cost of damage caused by flooding is to be presented at the International Conference of Flood Resilience: Experiences in Asia and Europe at the University of Exeter this week. The methodology combines information on land use with data on the vulnerability of the area to calculate the cost of both past and future flooding events. Climate change, along with increased building on flood plains, has led to both a greater likelihood and a higher impact of flooding across the globe. The method has already been employed to estimate the damage ...

Tropical Depression 12E formed off the southwestern coast of Mexico at 5 a.m. EDT on Sept. 5. Just 40 minutes before, NASA's TRMM satellite passed overhead and saw some "hot towers" around the center, indicating that the low pressure area that was previously known as System 99E would strengthen. A "hot tower" is a tall cumulonimbus cloud that reaches at least to the top of the troposphere, the lowest layer of the atmosphere. It extends approximately nine miles (14.5 km) high in the tropics. The hot towers in Tropical Depression 12E were reaching heights of 15 km/9.3 miles ...

A new watermarking technology based on a system akin to the permutation rules used to solve the numeral puzzles known as Sudoku has been developed by computer scientists in Malaysia. Writing in the International Journal of Grid and Utility Computing the team reports how their system could resist attempts to "crop" the watermark in more than nine times out of ten cases. Images, photos and graphics on the web are easy pickings for plagiarists and those who might ignore copyright rules. Photographers and others often add a watermark to their images to reduce the risk of ...

Details of a survey of middle and high school student attitudes to cyberbullying and online safety will be published in the International Journal of Social Media and Interactive Learning Environments. The analysis of the results shows that many children are bullied and few understand internet safety. Stacey Kite, Robert Gable and Lawrence Filippelli of the Johnson & Wales University, in Providence, Rhode Island, USA, surveyed more than 4200 students about their knowledge of potential risks, appropriate use, and their behaviors on the internet and social networking sites, ...

One hour before midnight Eastern Daylight Time on Sept. 4, Tropical Depression 7 strengthened into Tropical Storm Gabrielle just 70 miles south of Ponce, Puerto Rico. NOAA's GOES-East satellite captured the development and NASA's GOES Project created an animation that showed the developing storm. VIDEO: This GOES-East series of animations from Sept. 1 through Sept. 5 shows the development of Tropical Depression 7 into Tropical Storm Gabrielle near Puerto Rico (lower right). ...

New Rochelle, NY -- Among a group of women with symptoms of angina who were tested for a suspected coronary blockage, nearly 3 times as many black women as white women died of heart disease. The study determined whether differences in the women's angina symptoms could affect the risk of death in these two groups, and the researchers report their findings in Journal of Women's Health, a peer-reviewed publication from Mary Ann Liebert, Inc., publishers. The article is available free on the Journal of Women's Health website at http://www.liebertpub.com/jwh. Jo-Ann Eastwood, ...

People who were deprived of one night's sleep purchased more calories and grams of food in a mock supermarket on the following day in a new study published in the journal Obesity, the official journal of The Obesity Society. Sleep deprivation also led to increased blood levels of ghrelin, a hormone that increases hunger, on the following morning; however, there was no correlation between individual ghrelin levels and food purchasing, suggesting that other mechanisms—such as impulsive decision making—may be more responsible for increased purchasing. Researchers in Sweden ...

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, ...