Russian physicists from VNIIFTRI SINP MSU and ITEP studied the acoustic effects from entry bunch of electrons in a substance. Interest in him is linked with the possibility of acoustic detection of ultrahigh-energy cosmic neutrinos. Neutrino - trudnoulovimye most of the known elementary particles. Neutrino detectors (often called neutrino telescopes) are the big tanks of water (or ice, for example, IceCube in Antarctica), in which the many "electronic eyes" - photomultiplier. These detectors are so deep under the ground (under water, under the Antarctic ice), that no other particles, except neutrinos, they can not reach. The vast majority of neutrinos pass a detector thoroughly, leaving no trace, and only rarely are they the same? Face? on matter, it turns into electrons. If the original neutrinos

Scientists from the Low Temperature Laboratory of Helsinki University of Technology investigated the heat transfer between two small metal samples, coupled superconductor. They found that at very low temperatures heat is distributed via electromagnetic radiation, reported EurekAlert. Dr. Matthias Bags (Matthias Meschke), prof. Jukka Pekola (Jukka Pekola) and their colleagues studied the spread of heat in the micro-devices and nanorazmera based on conventional silicon chips, at a temperature of 0.1 degrees above absolute zero. During the study, scientists found that at very low temperatures heat is distributed through the superconductor through the electromagnetic radiation. At the same coefficient of thermal conductivity can only accept a strictly defined quantum values. (more...)