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排序方式: 共有409条查询结果,搜索用时 15 毫秒
361.
The article examines how the structure of party systems, that is, effective number of political actors, electoral volatility, and shares of dominant party votes and seats, affect the initiation and direction of electoral reform in post-communist democracies. Based on a dataset of electoral rule changes in post-communist democracies from 1992 to 2008, we analyze the frequency and direction of reforms over time. The findings reveal that the frequency of reforms declines with successive electoral cycles but not to the degree suggested by theories of institutional inertia. Countries with high levels of voter volatility are more likely to engage in reforms; however, the findings in this article demonstrate that politicians react to volatility by inconsistently choosing between permissive and restrictive responses. 相似文献
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363.
European Journal of Political Research - 相似文献
364.
美国地方政府实行高度自治的政治制度,这是美国联邦制政治体制的重要组成部分.这种体制的形成经历了漫长的发展和演变过程.美国地方政府自治要受到联邦宪法和法律、州宪法和法律的控制.州与地方政府之间的关系受到狄伦原则的影响,该原则在不同历史时期和不同的州有不同的理解.这些共同构成美国特色的地方自治政治和法律制度. 相似文献
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367.
Depending upon specific situations, some victims of sexual assault provide vaginal samples more than 36-48 h after the incident. We have tested the ability of commercial and in-house Y-STR systems to provide DNA profiles from extended interval (> or =3 days) postcoital samples. The commercial Y-STR systems tested included the AmpFlSTR Yfiler (Applied Biosystems), PowerPlex Y (Promega) and Y-PLEX 12 (Reliagene) products whereas the in-house systems comprised Multiplex I (MPI) and Multiplex B (MPB). Three donor couples were recruited for the study. Postcoital cervicovaginal swabs (x2) were recovered by each of the three females at specified intervals after sexual intercourse (3-7 days). Each time point sample was collected after a separate act of sexual intercourse and was preceded by a 7-day abstention period. As a negative control, a precoital swab was also recovered prior to coitus for each sampling and only data from postcoital samples that demonstrated a lack of male DNA in the associated precoital sample was used. A number of DNA profile enhancement strategies were employed including sampling by cervical brushing, nondifferential DNA extraction methodology, and post-PCR purification. Full Y-STR profiles from cervicovaginal samples recovered 3-4 days after intercourse were routinely obtained. Profiles were also obtainable 5-6 days postcoitus although by this stage partial profiles rather than full profiles were a more likely outcome. The DNA profiles from the sperm fraction of a differential lysis were superior to that obtained when a nondifferential method was employed in that the allelic signal intensities were generally higher and more balanced and exhibited less baseline noise. The incorporation of a simple post-PCR purification process significantly increased the ability to obtain Y-STR profiles, particularly from 5- to 6-day postcoital samples. Remarkably an 8 locus Y-STR profile was obtained from a 7-day postcoital sample, which is approaching the reported time limit for sperm detection in the cervix. 相似文献
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369.
David Terburg Barak Morgan Jack van Honk 《International journal of law and psychiatry》2009,32(4):216-223
Social aggression is an escalating hazard for individuals and society. It is most frequently observed as impulsive–reactive aggression in antisocial personality disorder (APD), but in psychopathic aggressive personalities instrumental social aggression is more prominent. However, the psychobiological mechanisms underlying human social aggression are still poorly understood. Here we propose a psychobiological mechanism that may explain human social aggression wherein the steroid hormones cortisol and testosterone play a critical role. High levels of testosterone and low levels of cortisol have been associated with social aggression in several species but it seems that in those individuals wherein these hormonal markers combine social aggression is most violent. In this review we discuss fundamental and clinical research which underscores the potential of the testosterone–cortisol ratio as a possible marker for criminal aggressive tendencies. 相似文献
370.
Latent Fingermark Aging Patterns (Part III): Discontinuity Index as One Indicator of Degradation 下载免费PDF全文
Josep De Alcaraz‐Fossoul Ph.D. Carme Barrot Feixat Ph.D. Clara Carreras‐Marin M.Sc. Jack Tasker B.Sc. Sara C. Zapico Ph.D. Manel Gené Badia Ph.D. 《Journal of forensic sciences》2017,62(5):1180-1187
This article is the third in a series of reports exploring quantifiable visual parameters of the aging process of latent fingermarks. On this occasion, research is focused on the occurrence of ridge discontinuities (i.e. breakages) as a function of time. Experiment variables included type of secretion (eccrine and sebaceous), substrate (glass and plastic), and exposure to natural light (dark, shade, and direct light) over a 6 months period. Fingermarks were sequentially visualized with titanium dioxide powder, photographed, and the number of naturally occurring ridge discontinuities subsequently evaluated. A semi‐quantitative value, named Discontinuity Index, was used to better characterize this aging parameter. Results indicated that ridges of sebaceous depositions on glass were generally less affected by the environmental conditions compared with those on plastic surface. In addition, aging in darkness was not always the best condition for preservation, and the direct exposure to light seemed not to affect the degradation under certain conditions. 相似文献