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排序方式： 共有6610条查询结果，搜索用时 15 毫秒
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David M. Jenkins Jr. Ph.D. W. Bosseau Murray M.D. Mary J. Kennett Ph.D. D.V.M. Edward L. Hughes M.A. Jacob R. Werner V.M.D. 《Journal of forensic sciences》2013,58(3):684-692
This study investigated and evaluated the safety margins of the continuous long duration (up to 30 min) effect of the TASER X26 waveform, using a Sus scrofa model. Long duration continuous stimulus has not been evaluated on humans or human surrogates prior to this study. Swine were used as models due to similarities with humans in their skin and cardiovascular systems. Very long duration was used to determine both exposure dose and possible adverse physiological effects of dose. The trial began with an application of 10 min, and subsequent animals received increasing exposure time up to a survived maximum duration of 30 min. At the onset of this work, it was hypothesized that there would be a time limit after which most animals would not survive consistent with increased dose response. However, this hypothesis was not supported by the experimental results. All animals (10 of 10) survived up to 3 min. Seven of the 10 animals survived up to a 10‐min exposure and 3 of 5 animals with a 30‐min target exposure survived the full exposure. Surviving animals were recovered and observed for 24 h, with no postrecovery deaths. This suggests that swine (based on physiology) will not experience a fatal event when exposed to the TASER X26 for a continuous 3 min. Conclusions regarding longer duration (10–30 min) are not as certain due to the small sample sizes at these time intervals. 相似文献
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Fibers are a commonly encountered evidence type and fiber comparisons are routinely conducted. When the characteristics of questioned and known fibers correspond, the probative value is limited because the characteristics compared are determined by their manufacture. It would be valuable to test the hypothesis that questioned fibers originated from a specific carpet. One means of testing this is to analyze fine particles on the fibers. A procedure was developed for removing adhering particles from fibers and preparing them for scanning electron microscopy/ energy dispersive X‐ray spectrometry (SEM/EDS) analysis. The efficacy of several fluids (acetone, ethanol, hexanes, aqueous ethanol, aqueous sodium hexametaphosphate) and agitation methods (sonication and vortexing) for removing particles from fibers was evaluated. The most effective method evaluated was sonication in ethanol for 10 min. The recovered particles were filtered onto a polycarbonate filter and analyzed by automated SEM/EDS analysis to generate data on the particle assemblage. This method makes possible future research to test the within‐item and between‐item variability of particle assemblages on fibers. 相似文献
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In recent years controversy has arisen over whether the rate of women's gun ownership has increased over time. While media reports claimed a rising trend in women's gun ownership, existing scholarly studies found stable rates over time. This paper investigates the issue using the 1973–2002 General Social Survey data. Our bivariate analysis reveals a declining trend in female gun ownership, especially in recent years. The logistic regression results indicate that holding relevant variables constant, the probability of female gun ownership decreases over time. Comparisons are also made with men. Similar results for male gun ownership are obtained. Possible explanations and implications of findings are discussed. 相似文献
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In the current study, by drawing on the literature concerning peer deviance and criminological social learning theory, and on theory and research concerning cultural variability in uncertainty avoidance, we offer a rationale for predicting that peer deviance will be lower among Japanese than among Americans. The lower level of peer deviance among Japanese, in turn, might explain why crime and deviant behaviour are less common in Japan compared to the United States. Analyses of comparable survey data from college students in Japan and the United States (N = 1271) provide strong support for our hypothesis. 相似文献
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David Ian Bainbridge 《The Law teacher》2013,47(3):279-292
ABSTRACTThe project discussed here involved an online debating activity between intellectual property (IP) law students in Egypt and the UK, using a closed group on Facebook. The aim was to harness freely available online social media technology to create a space in which valuable discussions and learning could take place. We showed that Facebook can be a powerful educational tool to encourage active learning and usefully connect learners across continents. In enabling the exchange of views between students in different jurisdictions, Facebook provides exposure to different cultures and different perspectives as well as different legal cultures and different legal systems, while also, importantly, enabling participants to identify commonalities. This debate focused on IP law, which is of increasing international importance, and specifically on the topic of access to medicines, which is highly contentious. Through the activity, students learned that they need not only to learn the law, but also to appreciate the socio-cultural and political complexity underlying policy issues in different jurisdictions. On reflection, the Facebook debate definitely enhanced the study of IP law through an interesting and enjoyable international, intercultural activity, led by staff and students, which successfully extended the classroom experience. 相似文献