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Domjan Michael; Mahometa Michael J.; Mills Andrew D. 《Canadian Metallurgical Quarterly》2003,117(4):391
Two contrasting investigative techniques provided evidence consistent with the interpretation that female quail (Coturnix japonica) regulate male copulatory behavior by the duration of their immobility and through this behavioral mechanism they also control the rate of fertilization of their eggs. In Experiment 1, copulation tests with males and females from different genetic lines showed that the type of female that participated in a copulatory test significantly influenced the latency of the male's grab, mount, and cloacal contact responses and also determined the efficiency of the male's copulatory behavior. These measures of male performance were correlated with female immobility in Experiment 2, which used a more homogeneous population of quail. Furthermore, 2 of these measures (copulatory efficiency and the latency to make cloacal contact) were correlated with fertilization rate. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Dhyanjyoti Deka Deepu S. Joseph Somnath Ghosh Michael J. Mills 《Metallurgical and Materials Transactions A》2006,37(5):1371-1388
This paper develops an experimentally validated computational model based on crystal plasticity for the analysis of two-phase
α/β Ti-6242 polycrystalline alloys. A rate-dependent elastic-crystal plasticity model is incorporated in this model to accommodate
anisotropy in material behavior and tension-compression asymmetry inherent to this alloy. A combination of microtesting, orientation
imaging microscopy, computational simulations, and minimization process, involving genetic algorithms, is implemented in this
study for careful characterization and calibration of the material parameters. Size effects are considered in this analysis
through a simple scaling process. A homogenized equivalent model of the primary α with transformed β colonies is developed
for incorporation in the Ti-6242 FE model. The polycrystalline Ti-6242 computational model incorporates accurate phase volume
fractions, as well as statistically equivalent orientation distributions to those observed in the orientation imaging microscopy
scans. The effects of orientation, misorientations, and microtexture distributions are investigated through simulations by
this computational model. The model is used to simulate constant strain rate and creep tests in compression and tension, and
the results are compared with experiments. The effects of microstructure and creep-induced load-shedding on the localization
of microstructural stresses and strains are studied for potential crack initiation criteria. 相似文献
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The history of psychiatric therapeutic communities is complex and obscure. Nevertheless, one can make a reasonable case for saying that the first true therapeutic community was created at Northfield Military Hospital, Birmingham, England, in 1945. That community had its origins in the thought and practice of two British psychoanalysts, John Rickman and Wilfred Ruprecht Bion. Accordingly, in the present article their careers and the social and intellectual influences bearing on them are discussed. The article then continues by describing Rickman's work as a military psychiatrist, Bion's prototype of a therapeutic community, and the therapeutic community that was eventually created at Northfield. It is hoped that the article will provide some of the groundwork for an adequate history of the therapeutic community. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献