Tech
Bottom Line: This observational study analyzed survey data from 1,652 active-duty military personnel to examine associations between firearm ownership and storage practices with suicidal thoughts and behaviors. More than one-third (35.7%) of military personnel reported having a firearm in or around their homes, with 32.2% indicating their firearms were safely stored unloaded and locked up.
The "Landau-level laser" is an exciting concept for an unusual radiation source. It has the potential to efficiently generate so-called terahertz waves, which can be used to penetrate materials as well as for future data transmission. So far, however, nearly all attempts to make such a laser reality have failed. An international team of researchers has now taken an important step in the right direction: In the journal Nature Photonics (DOI: 10.1038/s41566-019-0496-1), they describe a material that generates terahertz waves by simply applying an electric current.
PHILADELPHIA - Violence toward first responders is widespread and can face a felony charge in Pennsylvania, yet new research shows that victims often feel they do not receive legal justice. Now a study of victim cases and interviews with district attorneys in Philadelphia offers three solutions to help educate first responders and legal professionals to participate constructively in the legal system intended to prevent incidents from occurring and deliver justice.
Organic solar cells are made of cheap and abundant materials, but their efficiency and stability still lag behind those of silicon-based solar cells. A Chinese-German team of scientists has found a way to enhance the electric conductivity of organic solar cells, which increases their performances. Doping the metal oxide interlayer, which connected the electrode and active layer, with a modified organic dye boosted both the efficiency and stability, the study published in the journal Angewandte Chemie revealed.
Dr Antony Dodd, Senior Lecturer in the School of Biological Sciences and senior author of the paper, said: "This proof of concept research suggests that, in future, we might be able to refine the use of some chemicals that are used in agriculture by taking advantage of the biological clock in plants. Approaches of this type, combining biotechnology with precision agriculture, can provide economic and environmental benefits."
Have you ever wondered how marine animals smell the world, and how the olfactory system evolved from aquatic to terrestrial animals? There are two different classes of odorant receptor (OR) genes that can be expressed in olfactory sensory neurons: "class I" first identified in fish and frogs and then found to be common to all vertebrates, and "class II", which is specific to terrestrial animals. How does the olfactory sensory neuron know which class of OR to express?
During the 2016 Presidential Election, both major party candidates, Hillary Clinton and Donald Trump, ran on polarizing platforms focusing on a few central issues: immigration, medicare, social issues (i.e., abortion, paid family leave), international trade, and sexism and violence against women.
ATHENS, Ohio (Aug. 15, 2019) - When Earth's species were rapidly diversifying nearly 500 million years ago, that evolution was driven by complex factors including global cooling, more oxygen in the atmosphere, and more nutrients in the oceans. But it took a combination of many global environmental and tectonic changes occurring simultaneously and combining like building blocks to produce rapid diversification into new species, according to a new study by Dr. Alycia Stigall, Professor of Geological Sciences at Ohio University.
Washington, DC, August 15, 2019 - A new study in the Journal of the American Academy of Child and Adolescent Psychiatry (JAACAP), published by Elsevier, reports that bullying victimization may increase the risk of suicide attempts among young adolescents by approximately three-times worldwide.
BOSTON - Researchers at Massachusetts General Hospital (MGH) have taken a key step forward in developing a new, possibly safer contrast agent for use in magnetic resonance imaging (MRI) exams. Contrast enhanced MRI is a widely used diagnostic tool with over 30 million procedures performed annually. Currently, gadolinium-based contrast agents (GBCAs) are used for this purpose, but recently concerns have been raised about the long-term safety of the gadolinium metal ion. The study's senior author is Eric M.
Conventional oil and gas production methods can affect groundwater much more than fracking, according to hydrogeologists Jennifer McIntosh from the University of Arizona and Grant Ferguson from the University of Saskatchewan.
High-volume hydraulic fracturing, known as fracking, injects water, sand and chemicals under high pressure into petroleum-bearing rock formations to recover previously inaccessible oil and natural gas. This method led to the current shale gas boom that started about 15 years ago.
A potentially useful material for building quantum computers has been unearthed at the National Institute of Standards and Technology (NIST), whose scientists have found a superconductor that could sidestep one of the primary obstacles standing in the way of effective quantum logic circuits.
A soft robotic exosuit - worn like a pair of shorts - can make both walking and running easier for the wearer, a new study reports. The self-contained, portable device, which weighs only 11 pounds, is capable of detecting the wearer's gait to provide the appropriate assistance, even in complex outdoor environments (see related video). It can reduce the metabolic cost of walking and running by 9.3% and 4.0%, respectively, the authors say - a range of improvement that has shown to be meaningful in athletic performance.
An analysis of helium isotopes locked inside “super-deep” diamonds hundreds of kilometers below Earth’s surface suggests that vast reservoirs of molten primordial source rock, perhaps nearly as old as the Earth, are present. The helium-bearing diamonds studied as part of the analysis provide the first and most direct record of the variation of helium isotope compositions below Earth’s lithosphere, the authors say.
Researchers at Karolinska Institutet in Sweden have discovered a new sensory organ that is able to detect painful mechanical damage, such as pricks and impacts. The discovery is being published in the journal 'Science'.