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ABSTRACT Using data from the Russian Longitudinal Monitoring Study – Higher School of Economics (RLMS), we estimate the relationship between the sense of control, measured as the belief that one has control over one’s important future life circumstances and job-related training for women and men in a transitional context. We test the theory of alternative resources and the critical approaches in the analysis of the role of gender in individual outcomes from training. We show that while job-related training is associated with higher sense of control (measured using Pearlin Mastery Scale), its effect varies by gender and therefore, its absolute value is limited. We conclude that job-related training exacerbates the existing differences in the sense of control between women and men in Russia, which can potentially have prolonged, negative effects on the wider outcomes of women in the labour market. 相似文献
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The paper surveys mathematical tools required for stability and convergence analysis of modern sliding mode control systems. Elements of Filippov theory of differential equations with discontinuous right-hand sides and its recent extensions are discussed. Stability notions (from Lyapunov stability (1982) to fixed-time stability (2012)) are observed. Concepts of generalized derivatives and non-smooth Lyapunov functions are considered. The generalized Lyapunov theorems for stability analysis and convergence time estimation are presented and supported by examples from sliding mode control theory. 相似文献
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Drugs of abuse have been reported to produce both rewarding and aversive effects, as evidenced by their ability to induce
both conditioned place preferences (CPPs) and conditioned taste aversions (CTAs), respectively. Although several attempts
have been made to assess the relationship between the rewarding and aversive effects of drugs in independent groups, it is
unknown to what extent (if any) preferences and aversions are related in individual animals. The present study assessed this
relationship by examining the ability of morphine (5 and 10 mg/kg) and amphetamine (3 and 5 mg/kg) to induce both place preferences
and taste aversions in the same animal, using a concurrent CTA/CPP design. There was no consistent relationship between the
ability of morphine or amphetamine at either dose to increase time spent on the drug-paired side and the ability to suppress
consumption of the drug-paired taste. These results support the position that drugs of abuse have multiple stimulus effects,
both rewarding and aversive, that condition place preferences and taste aversions independently. 相似文献
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Vladimir N. KHMELEV Andrey V. SHALUNOV Roman V. BARSUKOV Denis S. ABRAMENKO Andrey N. LEBEDEV 《浙江大学学报(A卷英文版)》2011,12(4):247-254
The aim of this investigation was to define the effectiveness of non-contact drying using ultrasonic vibrations. Disk radiators
were used for carrying out experiments, and a special drying chamber was designed to provide resonant amplification of ultrasonic
vibrations (from 130 to 150 dB). Drying of ginseng and other vegetables demonstrated that the application of ultrasonic vibrations
reduced power inputs by 20% in comparison with convective drying. It also led to a decrease of 6% in final moisture content,
if the duration of drying was constant. The level of intensification of ultrasonic drying was high (up to 50 g for 1 kg of
drying material), which helped to lower the temperature of the drying agent and improve the quality of the dried products. 相似文献
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We use data on economic, management and political science journals to produce quantitative estimates of (in)consistency of the evaluations based on six popular bibliometric indicators (impact factor, 5-year impact factor, immediacy index, article influence score, SNIP and SJR). We advocate a new approach to the aggregation of journal rankings. Since the rank aggregation is a multicriteria decision problem, ranking methods from social choice theory may solve it. We apply either a direct ranking method based on the majority rule (the Copeland rule, the Markovian method) or a sorting procedure based on a tournament solution, such as the uncovered set and the minimal externally stable set. We demonstrate that the aggregate rankings reduce the number of contradictions and represent the set of the single-indicator-based rankings better than any of the six rankings themselves. 相似文献
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BEREZHNOY Andrey Yu SHCKORBATOV Yuriy G. HISANORI Kiryu 《Journal of Zhejiang University. Science. B》2006,7(12)
INTRODUCTION It is well known that the physical properties, namely DNA strands interaction in promoter are connected with their activity. As it was established the two promoter regions ?35 and ?10 are the most important for the promoter functioning, all bases in the ?35 (TTGACA) and ?10 (TATAAT) hexamers were highly conserved (Harley and Reynolds, 1987; Hawley and McClure, 1983). The functional impor- tance of these sequences was proved in many inves- tigations (Record et al., 199… 相似文献
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