نتایج جستجو برای: layer medium
تعداد نتایج: 509665 فیلتر نتایج به سال:
We investigate the propagation of a shock wave into a warm neutral medium and cold neutral medium by one-dimensional hydrodynamic calculations with detailed treatment of thermal and chemical processes. Our main result shows that thermal instability inside the shock-compressed layer produces a geometrically thin, dense layer in which a large amount of hydrogen molecules is formed. Linear stabili...
IEEE 802.15.4 is a standard for the medium access control (MAC) and physical layer protocols of wireless networks. This paper provides one of the first analytical evaluations of its MAC protocol for the slotted channel access mechanism in a star topology network. The form of the analysis is similar to that of Bianchi for IEEE 802.11 DCF. The key difference is in the main approximation assumptio...
We recently examined properties of the surface emission profiles of particles (photons) injected into a turbid medium consisting of two layers [R. Nossal, J. Kiefer, G. H. Weiss, R. F. Bonner, H. Taitelbaum, and S. Havlin, "Photon Migration in Layered Media," Appl. Opt. 27, 3382-3391 (1988)]. The two layers differ in the coefficient that appears when internal absorption is modeled in terms of B...
Ad hoc networks can be established every time and everywhere, and they are usually comprised of a group of workstations or other wireless devices that communicate directly with each other to exchange information. Usually there is no central management available. The topology in ad hoc networks may change rapidly due to the unpredictable mobility of individual devices. A wireless mesh network (W...
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