Updated: 2 hours 52 min ago
In a big step for securing critical information systems, such as medical records in clinical settings, researchers have created a new approach to computer security that authenticates users continuously while they are using a terminal and automatically logs them out when they leave or when someone else steps in to use their terminal.
NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft successfully entered Mars' orbit at 7:24 p.m. PDT (10:24 p.m. EDT) Sunday, Sept. 21, where it now will prepare to study the Red Planet's upper atmosphere as never done before. MAVEN is the first spacecraft dedicated to exploring the tenuous upper atmosphere of Mars.
A person's face is the first thing that others see, and much remains unknown about how it forms -- or malforms -- during early development. Recently, researchers have begun to unwind these mysteries.
Researchers have created a new search algorithm that improves a robot's ability to find and navigate to tagged objects. The team has implemented their system on a PR2 robot, allowing it to travel through a home and correctly locate different types of tagged household objects, including a medication bottle, TV remote, phone and hair brush.
Climate change is a fact, and most of the warming is caused by human activity. The Arctic is now so warm that the extent of sea ice has decreased by about 30 percent in summer and in winter, sea ice is getting thinner. New research has shown that sea ice removes CO2 from the atmosphere. If Arctic sea ice is reduced, we may therefore be facing an increase of atmospheric concentration of CO2, researchers warn.
A functional link between the brain region responsible for taste memory and the area responsible for encoding the time and place we experienced the taste had been found. The findings expose the complexity and richness of the simple sensory experiences that are engraved in our brains and that in most cases we aren't even aware of. The study can also help explain behavioral results and the difficulty in producing memories when certain areas of the brain become dysfunctional following and illness or accident.
Scientists have shown how gravitational waves -- invisible ripples in the fabric of space and time that propagate through the universe -- might be 'seen' by looking at the stars. The new model proposes that a star that oscillates at the same frequency as a gravitational wave will absorb energy from that wave and brighten, an overlooked prediction of Einstein's 1916 theory of general relativity. The study contradicts previous assumptions about the behavior of gravitational waves.
Patients with severe injuries should be treated at level I or level II trauma centers, experts say. Those centers have the resources to provide the best care for those patients. But one out of three major trauma patients in 2010 actually received their treatment at lower-level trauma centers or nontrauma centers, according to a new study.
A low-cost, one-time intervention that educates teens about the changeable nature of personality traits may prevent an increase in depressive symptoms often seen during the transition to high school, according to new research.
Mothers of children with autism less likely to have taken iron supplements in pregnancy, study shows
Mothers of children with autism are significantly less likely to report taking iron supplements before and during their pregnancies than the mothers of children who are developing normally, a study by researchers.
Certain nerve cells take a shortcut for the transmission of information: signals are not conducted via the cell`s center, but around it like on a bypass road. This is a previously unknown nerve cell shape. Nerve cells communicate by using electrical signals.
Through the use of a new antibody, an international team of researchers has demonstrated how Parkinson's disease spreads from cell to cell in the human brain. Until now, this mechanism has only been observed in experimental models, but has now been demonstrated for the first time in humans too.
Targeted therapy to treat acute myelogenous leukaemia (AML) may be closer, thanks to recent research. The scientists discovered that inhibition of Leo1 and Leo1 downstream signalling pathways provide an avenue for targeted treatment of the disease. In addition, this is the first study to suggest that the protein PRL-3 plays a role in the regulation of ribonucleic acid (RNA) related processes, a finding which advances the understanding of how the protein contributes to cancer progression.
Dry roasted peanuts are more likely to trigger an allergy to peanuts than raw peanuts, suggests a study involving mice. The researchers say that specific chemical changes caused by the high temperatures of the dry roasting process are recognized by the body's immune system, 'priming' the body to set off an allergic immune response the next time it sees any peanuts.
For the first time, scientists have discovered how to produce ultra-thin 'diamond nanothreads' that promise extraordinary properties, including strength and stiffness greater than that of today's strongest nanotubes and polymers. The threads have a structure that has never been seen before.
Researchers have found new adhesives based on mussel proteins could be useful for naval or medical applications. To create their new waterproof adhesives, researchers engineered bacteria to produce a hybrid material that incorporates naturally sticky mussel proteins as well as a bacterial protein found in biofilms -- slimy layers formed by bacteria growing on a surface. When combined, these proteins form even stronger underwater adhesives than those secreted by mussels.
A major limitation in the performance of solar cells happens within the photovoltaic material itself: When photons strike the molecules of a solar cell, they transfer their energy, producing quasi-particles called excitons -- an energized state of molecules. That energized state can hop from one molecule to the next until it's transferred to electrons in a wire, which can light up a bulb or turn a motor.
Contrary to what was previously thought, newborn immune T cells may have the ability to trigger an inflammatory response to bacteria, according to a new study. Although their immune system works very differently to that of adults, babies may still be able to mount a strong immune defense, finds the study.
Battling superbugs: Two new technologies could enable novel strategies for combating drug-resistant bacteria
Two new technologies could enable novel strategies for combating drug-resistant bacteria, scientists report. Most antibiotics work by interfering with crucial functions such as cell division or protein synthesis. However, some bacteria have evolved to become virtually untreatable with existing drugs. In the new study, researchers target specific genes that allow bacteria to survive antibiotic treatment. The CRISPR genome-editing system presented the perfect strategy to go after those genes, they report.
Biochemists have developed a program that predicts the placement of chemical marks that control the activity of genes based on sequences of DNA. By comparing sequences with and without epigenomic modification, they identified DNA motifs associated with the changes. They call this novel analysis pipeline Epigram and have made both the program and the DNA motifs they identified openly available to other scientists.