3,344 research outputs found
Joint Allocation of Power and Decoding Orer for Successive Inter- and Intra-Cell Interference Cancellation
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Morphology of polymer/silicate nanocomposites - High density polyethylene and a nitrile copolymer
No full textNanoscale composites of a modified silicate with either high-density polyethylene (HDPE) or a nitrile copolymer have been examined. Hydrophilic silicate clay was intercalated by ion exchange reaction of alkylammonium ions. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results revealed that so-modified silicate layers were finely dispersed in these polymeric matrices. Instead of being individually dispersed, most layers were found in thin stacks comprising several swollen layers. Greater dispersion was found in the nitrile copolymer rather than in HDPE, suggesting differences in the degree of physical interaction with the modified clay. Lamellar crystals of HDPE formed parallel to the silicate layers
Friction Parameter Identification and Compensation Scheme of X-Y Table by Using Evolutionary Algorithm
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Low velocity friction identification and compensation using accelerated evolutionary programming
No full textStructures and isomerization of serine in aqueous solution: Computational study
No full textCalculations are presented for the structure and the isomerization reaction of serine in aqueous solution. Polarizable continuum model (PCM) is employed to determine the effects of solvent on the stability of serine zwitterion relative to the canonical form and the proton transfer paths for the zwitterion/canonical isomerization reaction in the solution phase. The discrete/continuum model is also adopted to analyze the solute-solvent interactions. We find that the latter model gives much more accurate relative stability of canonical and zwitterion forms of serine than PCM in the aqueous solution. (C) 2005 Elsevier B.V. All rights reserved.This work was supported by the Korea Research
Foundation (KRF-2002-070-C00046)
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