Researchers based at Oak Ridge National Laboratory and the Univ. of Tennessee have discovered a molecular “switch” in a receptor that controls cell behavior. Researchers identified the molecular switch using detailed molecular dynamics simulations on a computer called Anton, built by D. E. Shaw Research in New York City.
Lawrence Livermore National Laboratory researchers have combined ultra-fast time-resolved experimental measurements with theory to reveal how an explosive responds to a high-impact shock. The work involved advances in both ultra-fast experimental shock wave methods and molecular dynamics (MD) simulation techniques, and the combination of experiment and simulation is a milestone in understanding chemical initiation and detonation.
Stanford Univ. scientists may have solved the mystery of what drives a type of earthquake that occurs deep within the Earth and accounts for one in four quakes worldwide. Known as intermediate-depth earthquakes, these temblors originate farther down inside the Earth than shallow earthquakes, which take place in the uppermost layer of the Earth's surface, called the crust.
For some microbes, the motto for growth is not so much “every cell for itself,” but rather, “all for one and one for all.” Researchers have found that cells in a bacterial colony grow in a way that benefits the community as a whole. That is, while an individual cell may divide in the presence of plentiful resources to benefit itself, when a cell is a member of a larger colony, it may choose instead to grow in a more cooperative fashion.
Multiphysics software simulations are used by biomedical equipment developers to reliably design complex mechanisms for enhancing the human physical condition. These medical devices can include tools for treating cancers, enhancing hearing and treating chronic back pain.
A researcher team from Spain and Italy say that when envisioning in vivo microrobots of the future, we should forget cogwheels, pistons and levers. These miniature robots will be soft, and behave much like euglenids, tiny unicellular aquatic animals. Their work in studying these creatures have given them insights on how to design soft robots with effective mechanical structures.
Researchers have combined cutting-edge experimental techniques and computer simulations to find a new way of predicting how water dissolves crystalline structures like those found in natural stone and cement. The research could have wide-ranging impacts in diverse areas, including water quality and planning, environmental sustainability, corrosion resistance and cement construction.
Two German researchers have used a simple energy balance analysis to explain how the Earth’s water cycle responds differently to heating by sunlight than it does to warming due to a stronger atmospheric greenhouse effect. This difference, their work shows, implies that reflecting sunlight to reduce temperatures may have unwanted effects on the Earth’s rainfall patterns.
The Office of Naval Research is demonstrating the Fleet Integrated Synthetic Training/Testing Facility (FIST2FAC) in Florida this week, showing how gaming technology is helping naval forces develop operations strategies in a hassle-free way.
According to recent Princeton Univ.-led research that simulated an emissions-free Earth, the carbon dioxide already in the atmosphere could continue to warm our planet for hundreds of years, even if emission came to a sudden halt. The study suggests that it might take a lot less carbon than previously thought to reach the global temperature scientists deem unsafe.
In a recent study presented at the Supercomputing Conference SC13 in Denver that may earn them the Gordon Bell Prize, physicists from Germany have simulated the motion of billions of electrons within astrophysical plasma jets and calculated the light they emit. Tracking the movements of nearly a hundred billion particles required the help of a high-performance computer.
Researchers at Los Alamos National Laboratory are investigating the complex relationships between the spread of the HIV virus in a population (epidemiology) and the actual, rapid evolution of the virus (phylogenetics) within each patient’s body. The team models the uninfected population using traditional differential equations on the computer; this is done for computational speed, because an agent-based component is much more demanding.
A brain stimulation technique that is used to treat tough cases of depression could be considerably improved with a new headpiece designed by Univ. of Michigan engineers. Computer simulations showed that the headpiece—a square array of 64 circular metallic coils—could one day help researchers and doctors hit finer targets in the brain that are twice as deep as they can reach today, and without causing pain.
Honeycomb sandwich panels, with their high strength-to-weight ratios, have significant advantages over monocoque construction for certain applications. Twin-skinned plates/shells with a honeycomb core are widely used in the aerospace industry for structures such as aircraft fuselages, engine cowlings and impact protection shields.
Oscilloscopes display and measure the wave shape of an electrical signal. High-performance oscilloscopes, which are capable of measuring signals at very high frequencies, are primarily used in high-speed applications. Agilent Technologies recently released the Infiniium 90000 Q-Series oscilloscope, which is the world’s highest bandwidth commercially available real-time oscilloscope and the first to reach the 60-GHz barrier.
The modeling and simulation of various manufacturing processes is important because, in many cases, it’s impractical or even impossible to measure the specific operating parameters involved that contribute to the resulting products. This is particularly true in high-temperature processes like blast furnaces or the welding of large metal structures such as those used in shipbuilding and reactor vessels.
A new study set out to use numerical simulations to validate previous theoretical predictions describing materials exhibiting so-called antiferromagneting characteristics. A recently discovered theory shows that the ordering temperature depends on two factors—namely the spin-wave velocity and the staggered magnetization. The simulations match these theoretical predictions.
The universe is a vast and mysterious place, but thanks to high-performance computing technology scientists around the world are beginning to understand it better. They are using supercomputers to simulate how the Big Bang generated the seeds that led to the formation of galaxies such as the Milky Way.
Enhanced growth of Earth's leafy greens during the 20th century has significantly slowed the planet's transition to being red-hot, according to the first study to specify the extent to which plants have prevented climate change since pre-industrial times. Researchers have found that land ecosystems have kept the planet cooler by absorbing billions of tons of carbon, especially during the past 60 years.
Multiphysics software developer COMSOL is holding its COMSOL Conference Oct. 9-11 at the Boston Marriott Newton. The event will draw together engineers, scientists and researchers to learn from the leaders in multiphysics simulation and discover the latest tools from COMSOL.
Researchers are using computer simulations to investigate how ultrasound and tiny bubbles injected into the bloodstream might break up blood clots, limiting the damage caused by a stroke in its first hours. Strokes are the most common cause of long-term disability in the U.S. and the third most common cause of death.
To get a better understanding of the subatomic soup that filled the early universe, and how it “froze out” to form the atoms of today’s world, scientists are taking a closer look at the nuclear phase diagram. Like a map that describes how the physical state of water morphs from solid ice to liquid to steam with changes in temperature and pressure, the nuclear phase diagram maps out different phases of the components of atomic nuclei.
Just as wind turbines tap into the energy of flowing air to generate electricity, hydrokinetic devices produce power from moving masses of water. Engineers in Spain have performed a computer simulation to determine the optimal configuration of a system produced by a Norwegian company to enable it to extract the maximum amount of energy from any given current.
The amazingly efficient lungs of birds and the swim bladders of fish have become the inspiration for a new filtering system to remove carbon dioxide from electric power station smokestacks before the main greenhouse gas can billow into the atmosphere and contribute to global climate change. A report on the new technology was presented Monday at the 246th National Meeting & Exposition of the American Chemical Society.
Electronic devices with touchscreens rely on transparent conductors made of indium tin oxide, or ITO. But cost and the physical limitations of this material are limiting progress in developing flexible touchscreens. A research collaboration between the Univ. of Pennsylvania and Duke Univ. is exploring the use of nanowires to replace ITO, and are using simulation tools to determine how they might work.