|Filed Under:||Academics / General Science|
|Posts on Regator:||650|
|Posts / Week:||2.6|
|Archived Since:||April 9, 2010|
(Phys.org) —The advantages of sustainable, biodegradable, carbon-neutral and bioderived renewable polymers – that is, synthetic polymers based on biomolecules produced by living organisms – are reflected in the extent of the research recently conducted into their development. Show More Summary
(Phys.org) —What happens when you shoot multiwalled carbon nanotubes (MWCNTs) out of a gun onto an aluminum target at a velocity of more than 15,000 mph? Scientists finally have the answer. If a nanotube reaches the target at a 90° angle (head-on), it will break and deform quite drastically. Show More Summary
(Phys.org) —Since 1916, general relativity has provided a description of gravity that can explain many observations, including objects in free fall, gravitational lensing by massive objects, and black holes. Despite the success of the...Show More Summary
(Phys.org) —Cooling microscopic objects to temperatures near absolute zero requires unconventional refrigeration technologies. One microscale cooling method is superconducting refrigeration, in which refrigerators extract hot quasiparticles (collective excitations) from non-superconducting metals and transport them to superconducting metals. Show More Summary
(Phys.org) —Today's commercial flash memories usually store data as electric charge in polysilicon layers. Because polysilicon is a single continuous material, defects in the material can interfere with the desired charge movement, which can limit data retention and density.
(Phys.org) —Genetic engineering is one of the great achievements of modern science, allowing for the insertion or deletion of genes in order to control an organism's characteristics and behaviors. However, genetic engineering has its...Show More Summary
(Phys.org) —Cryptography – the art and science of providing secure communications – typically employs three methods to authenticate users and prevent data theft: secret key (symmetric) cryptography, which uses a single key for both encryption...Show More Summary
(Phys.org) —Sometimes mathematical theories have implications that extend far beyond their original purpose. This situation holds true for the four-color theorem, which was originally used by cartographers hundreds of years ago to draw maps. Show More Summary
(Phys.org) —Humans have a strong tendency to belong to a group, an instinct that often manifests in herding behavior. Not limited to humans, herding exists throughout nature, for example in ant colonies, schools of fish, and flocks of birds. But what about the stock market?
(Phys.org) —Physicists are continually looking for ways to unify the theory of relativity, which describes large-scale phenomena, with quantum theory, which describes small-scale phenomena. In a new proposed experiment in this area,Show More Summary
(Phys.org) —When C. K. Hong, Z. Y. Ou and Leonard Mandel demonstrated destructive quantum interference between pairs of indistinguishable bosons in their 1987 paper1, they did so with massless photons. Their protocol – christened the...Show More Summary
(Phys.org) —If the recently released Google Glass and soon-to-be-available Apple iWatch are any indication, wearable electronics may be the next big wave of the future. Although they offer some cutting-edge features, from head displays to biomedical monitoring, arguably the biggest bottleneck for wearable technologies is the battery. Show More Summary
(Phys.org) —Cryptography – the practice and study of techniques for secure communication in the presence of third parties, referred to as adversaries – has a long and varied history. In ancient Greece, for example, the Spartan military may have used the so-called scytale transposition cipher to encrypt and decrypt messages. Show More Summary
(Phys.org) —As silicon-based electronics are predicted to reach their absolute limits on performance around 2020, new technologies have been proposed to continue the trend in the miniaturization of electronic devices. One of these approaches consists of constructing field-effect transistors (FETs) directly on carbon nanotubes (CNTs). Show More Summary
(Phys.org) —Although mass may seem to be a fairly straightforward concept, from a physics perspective it can be much more complex than weighing an object and reading off a number in grams. For instance, an object's mass can be modified by putting it in a different medium.
(Phys.org) —Sometimes paradoxes can be frustrating, but other times they can reveal something that was previously hidden. A new paradox in the field of network science, presented in a recent issue of EPL by Filippo Radicchi, Assistant Professor at Indiana University, seems to fall into the latter category.
(Phys.org) —In the burgeoning field of quantum metrology, quantum effects are exploited to improve the precision when measuring a variety of parameters, such as phase, frequency, and magnetic fields. A main goal of this research is to develop high-accuracy measurement devices that could benefit many areas of science. Show More Summary
(Phys.org) —It may sound impossible that a 1-nm-thick piece of graphene—made of just a single layer of carbon atoms and containing some chlorine and fluorine atoms—can function as a two-stroke combustion engine. After all, on the macroscale, two-stroke engines are often used to power devices such as chainsaws and motorcycles. Show More Summary
(Phys.org) —In an atom laser, millions of individual atoms propagate through space with minimal spreading, just like photons propagate in a coherent photon laser beam. Although both types of lasers are similar, atom lasers are stillShow More Summary
(Phys.org) —Carbon-based electronics are being widely explored due to their attractive electrical and mechanical properties, but synthesizing them in large quantities at low cost is still a challenge.