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تعداد نتایج: 187 فیلتر نتایج به سال:
VoIP services have been considered as one of the most important services in the next generation wireless systems. VoIP service requires the same quality of service (QoS) requirement as constant bit rate services. For this reason, the IEEE 802.16 standard has defined an unsolicited grant service (UGS) to guarantee the QoS. However, the UGS is inadequate to support VoIP services with silence supp...
We have purified and characterized a DNA-dependent RNA polymerase from the blue-green alga Fremyela dipsiphon. This enzyme, purified by gel filtration, DEAE-ceflulose chromatography, and glycerol gradient centrifugation, is comprised of five polypeptide subunits. Their masses are 161,000, 134,000, 91,000, 72,000, and 41,000 daltons. Preparative electrophoresis of the purified enzyme on nondenat...
O-Plan is a command, planning and control architecture with an open modular structure intended to allow experimentation on, or replacement of, various components. The research is seeking to determine which functions are generally required in a number of application areas and across a number of di erent command, planning, scheduling and control systems. O-Plan aims to demonstrate how a planner, ...
A) Abstract object (A1) Mythical or fictitious being (A1) Dragon Emotion/Abstraction (A2) Symbolic value (A2-1) Classic Page 6 of 22 Categorical and specificity differences between user-supplied tags and search query terms... 12/23/2009 http://informationr.net/ir/14-3/paper408.html For comparing the level of term specificity, the basic level theory was adopted. The basic theory explains that co...
L-edge XANES of a series of gold (AuA12, AuGa and Au2Ag) and nickel (NiSb, Ni Fe NiA1, and NiAl ) intermetallic compounds have been measured. !?t6Ys f86%gYthat the LI1 I : edges of AuA12 and AuGa2 exhibit very intense whiteline indicating a sign$flcant depletion of d character at the Au site of these compounds. This observation is interpreted in terms of a mechanism in which s-d interplay deter...
The Stanford Synchrotron Radiation Laboratory (SSRL) is now operating as a fully dedicated light source with low emittance electron optics, delivering high brightness photon beams to 25 experimental stations six to seven months per year. On October 1,1993 SSRL became a Division of the Stanford Linear Accelerator Center, rather than an Independent Laboratory -of Stanford University, so that high...
Mercury (Hg) is a potent neurotoxin and globally reducing environmental levels is seen as paramount for protecting human and wildlife health. In 2013, many countries finalized the negotiations on, and have now signed, the Minamata Convention on Mercury, which commits participating countries to reduce emissions and use of mercury. Successful implementation of the treaty will require adequate ver...
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