Science Journals RSS Feeds
Sponsored Links
Recent Comments

    Physics

    The probability that a nucleus will absorb a neutron is important to many areas of nuclear science, including the production of elements in the cosmos, reactor performance, nuclear medicine and defense applications. [...]
    Thu, Jan 17, 2019
    Source: Physorg Physics Category: PHYSICS
    Columbia University scientists, in collaboration with researchers from Harvard, have succeeded in developing a chemical process to convert visible light into infrared energy, allowing innocuous radiation to penetrate living tissue and other materials without the damage caused by high-intensity light exposure. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    Sudden bursts of heat that can damage the inner walls of tokamak fusion experiments are a hurdle that operators of the facilities must overcome. Such bursts, called "edge localized modes (ELMs)," occur in doughnut-shaped tokamak devices that house the hot, charged plasma that is used to replicate on Earth the power that drives the sun and other stars. Now researchers at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) have directly observed a possible and previously unknown process that can trigger damaging ELMs. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    Scientists have long employed relatively simple guidelines to help explain the physical world, from Newton's second law of motion to the laws of thermodynamics. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    The development of fiber optics technology has been indispensable to increasing the speed at which information is delivered over large distances by relying on light to carry information rather than electricity. Currently, incoming light signals are converted into electrical signals, after which the information they carry is processed. Digital communications and sharing of information would be even faster and more energy efficient if light could be used throughout the entire process, but significant additional advances in integrated optical circuits and light-based computing are still required. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    Insulators that are conducting at their edges hold promise for interesting technological applications. However, until now their characteristics have not been fully understood. Physicists at Goethe University have now modelled what are known as topological insulators with the help of ultracold quantum gases. In the current issue of Physical Review Letters, they demonstrate how the edge states could be experimentally detected. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    For the first time, researchers have documented the long-predicted occurrence of 'walls bound by strings' in superfluid helium-3. The existence of such an object, originally foreseen by cosmology theorists, may help explaining how the universe cooled down after the Big Bang. With the newfound ability to recreate these structures in the lab, earth-based scientists finally have a way to study some of the possible scenarios that might have taken place in the early universe more closely. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    Plasmas—hot gases consisting of chaotically-moving electrons, ions, atoms and molecules—comprise the interiors of stars, but scientists can create them artificially using special equipment in the laboratory. If a plasma comes in contact with a solid, such as the wall of the lab equipment, under certain circumstances, the wall is changed fundamentally and permanently: Atoms and molecules from the plasma can be deposited on the solid material, or energetic plasma ions can knock atoms out of the solid, and thereby deform or even destroy its surface. A team from the Institute of Theoretical Physics and Astrophysics at Kiel University (CAU) has now discovered a surprising new effect in which the electronic properties of the solid material, such as its electrical conductivity, can be changed by ion impact in a controlled, extremely fast and reversible manner. Their results were recently published in Physical Review Letters. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    The production of entropy, which means increasing the degree of disorder in a system, is an inexorable tendency in the macroscopic world owing to the second law of thermodynamics. This makes the processes described by classical physics irreversible and, by extension, imposes a direction on the flow of time. However, the tendency does not necessarily apply in the microscopic world, which is governed by quantum mechanics. The laws of quantum physics are reversible in time, so in the microscopic world, there is no preferential direction to the flow of phenomena. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    The human ear, like those of other mammals, is so extraordinarily sensitive that it can detect sound-wave-induced vibrations of the eardrum that move by less than the width of an atom. Now, researchers at MIT have discovered important new details of how the ear achieves this amazing ability to pick up faint sounds. [...]
    Wed, Jan 16, 2019
    Source: Physorg Physics Category: PHYSICS
    Sponsored Links
    Archives

    Copyright © 2013. All Rights Reserved.