Computations support the 30-year-old idea that supercooled liquid water can undergo a transition between high-and low-density states.
The Two Faces of Supercooled Water
Posted in futurism
Heat-transport measurements and neutron-scattering spectroscopy probe a form of thermal conduction based on excitations called phasons.
The understanding of how substances conduct heat is of great significance in materials science. It is needed for many important technological applications—from heat management in electronics to temperature control in buildings [1]. Therefore, when an unusual form of thermal transport is identified, materials scientists take notice. Michael Manley of Oak Ridge National Laboratory, Tennessee, and his colleagues have shown that excitations called phasons can provide the main contribution to thermal transport in a material known as fresnoite [2]. Phasons are collective lattice oscillations that occur in certain crystals with an aperiodic lattice structure—fresnoite being one of the best known. The researchers’ demonstration could pave the way for new heat-management strategies.
Thermal conductivity is a measure of a material’s ability to transfer heat. It is a property that we are all abruptly reminded of when we accidentally place our hand on a hot kitchen stove. The temperature gradient between our cooler skin and the hotter surface facilitates a transfer of energy into our hand, resulting in an unpleasant sensation. The notion that different materials conduct heat at different rates is similarly experienced when we perceive the cooling sensation of holding a metal spoon relative to a wooden one.
An increase in genetic regulatory elements explains how modern humans evolved a bigger brain size than other hominins.
Aging remains a primary risk factor for a host of diseases, including leading causes of death. Aging and associated diseases are inherently multifactorial, with numerous contributing factors and phenotypes at the molecular, cellular, tissue, and organismal scales. Despite the complexity of aging phenomena, models currently used in aging research possess limitations. Frequently used in vivo models often have important physiological differences, age at different rates, or are genetically engineered to match late disease phenotypes rather than early causes. Conversely, routinely used in vitro models lack the complex tissue-scale and systemic cues that are disrupted in aging.
Uber and Cartken have announced a partnership to introduce Miami to a fleet of tiny autonomous delivery vehicles.
Colombian renewable energy startup E-Dina developed a wireless lantern, called WaterLight, that converts salt water into electricity and is more reliable than solar-powered lamps, a Dezeen article explains. And it can also be charged by urine in emergency situations.
The portable device acts as a mini generator that produces light using ionization — by filling it with 500 milliliters of seawater, the salt in the water reacts with magnesium and copper plates inside the device, converting it into electrical energy.
After announcing that it had implanted its brain-computer interface in its first U.S. | After announcing that it had implanted its brain-computer interface in its first U.S. paralysis patient earlier this year, Synchron has raised $75 million to take its mind-reading tech to the next level.
A study found that a low carb, high fat diet can help people with type 2 diabetes lose weight and control glucose levels better than a high carb, low fat diet.
An outbreak of potentially deadly bacteria in at least four states has federal officials on alert. They said parents should be on the lookout for its symptoms, which include flesh-eating disease and toxic shock.
Researchers have developed a new all-optical method for driving multiple highly dense nanolaser arrays. The approach could enable chip-based optical communication links that process and move data faster than today’s electronic-based devices.
“The development of optical interconnects equipped with high-density nanolasers would improve information processing in the data centers that move information across the internet,” said research team leader Myung-Ki Kim from Korea University.
“This could allow streaming of ultra-high-definition movies, enable larger-scale interactive online encounters and games, accelerate the expansion of the Internet of Things and provide the fast connectivity needed for big data analytics.”