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Studies on materials with long charge decay times (notably pharmaceutical powders) have shown that the local charge decay time constant comes to increase linearly with time during the progress of charge decay. This is an empirical result. This linear increase provides the basis for calculating the time to 1/e and/or to 10% from much shorter periods of observation than the times to achieve these decays. The approach involves simple numerical processing of the rate of increase in the local charge decay time constant with time and the intercept of this at some selected time. This analysis is useful for assessing and comparing materials that have decay times over say 104 s. 相似文献
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A De A Mitra A Ray SR Banerjee M Sengupta A Chatterjee S Kailas HS Patel MG Betigiri SK Dutta 《Pramana》1999,53(3):549-552
In this paper, we report our measurements of back-angle oxygen and carbon particle yields from 16O+89Y, 12C+93Nb reactions forming the same compound nucleus 105Ag at the same excitation energy and spin distribution. We find anomalously large oxygen yield and entrance channel dependence
at high excitation energies from 16O+89Y reaction implying formation of a dinuclear orbiting complex. Possible connection between nuclear orbiting and fast fission
is also discussed. 相似文献
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Duffy FJ Verniere M Devocelle M Bernard E Shields DC Chubb AJ 《Journal of chemical information and modeling》2011,51(4):829-836
We introduce CycloPs, software for the generation of virtual libraries of constrained peptides including natural and nonnatural commercially available amino acids. The software is written in the cross-platform Python programming language, and features include generating virtual libraries in one-dimensional SMILES and three-dimensional SDF formats, suitable for virtual screening. The stand-alone software is capable of filtering the virtual libraries using empirical measurements, including peptide synthesizability by standard peptide synthesis techniques, stability, and the druglike properties of the peptide. The software and accompanying Web interface is designed to enable the rapid generation of large, structurally diverse, synthesizable virtual libraries of constrained peptides quickly and conveniently, for use in virtual screening experiments. The stand-alone software, and the Web interface for evaluating these empirical properties of a single peptide, are available at http://bioware.ucd.ie . 相似文献
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We establish that for every computably enumerable (c.e.) Turing degree b the upper cone of c.e. Turing degrees determined by b is the degree spectrum of the successor relation of some computable linear ordering. This follows from our main result, that
for a large class of linear orderings the degree spectrum of the successor relation is closed upward in the c.e. Turing degrees.
The authors acknowledge partial support by the NSF binational grant DMS-0554841, and Harizanov by the NSF grant DMS-0704256,
and Chubb by the Sigma Xi Grant in Aid of Research. 相似文献