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181.
Sarah J. Benson Ph.D. ; Christopher J. Lennard Ph.D. ; Philip Maynard Ph.D. ; David M. Hill B.Sc. ; Anita S. Andrew Ph.D. ; Ken Neal B.Sc. ; Hilary Stuart-Williams Ph.D. ; Janet Hope B.Sc. ; G. Stewart Walker Ph.D. ; Claude Roux Ph.D. 《Journal of forensic sciences》2010,55(1):205-212
Abstract: Comparability of data over time and between laboratories is a key issue for consideration in the development of global databases, and more broadly for quality assurance in general. One mechanism that can be utilized for evaluating traceability is an inter-laboratory trial. This paper addresses an inter-laboratory trial conducted across a number of Australian and New Zealand isotope ratio mass spectrometry (IRMS) laboratories. The main objective of this trial was to determine whether IRMS laboratories in these countries would record comparable values for the distributed samples. Four carbon containing and four nitrogen containing compounds were distributed to seven laboratories in Australia and one in New Zealand. The laboratories were requested to analyze the samples using their standard procedures. The data from each laboratory was evaluated collectively using International Standard ISO 13528 ( Statistical methods for use in proficiency testing by inter-laboratory comparisons ). "Warning signals" were raised against one participant in this trial. "Action signals" requiring corrective action were raised against four participants. These participants reviewed the data and possible sources for the discrepancies. This inter-laboratory trial was successful in providing an initial snapshot of the potential for traceability between the participating laboratories. The statistical methods described in this article could be used as a model for others needing to evaluate stable isotope results derived from multiple laboratories, e.g., inter-laboratory trials/proficiency testing. Ongoing trials will be conducted to improve traceability across the Australian and New Zealand IRMS community. 相似文献
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Obscene or nuisance phone calls are particularly targeted towards women. Employing data from two sweeps of the British Crime Survey a decade apart (BCS 1982 and BCS 1992), this work attempts to measure the effects of individual socio-economic characteristics and victimization history of women in England and Wales on their likelihood of receiving at least one nuisance call. To make the logit modelling analysis more tangible, risks of nuisance calls are calculated from our models of five hypothetical women, single mother, professional, student, housewife and pensioner, with specific attributes taken from the set of explanatory variables. 相似文献
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Ken Peak 《Journal of criminal justice》1987,15(6)
This article explores the status of crime among the American Indian population. Quantitative information regarding Indian offenses and arrest is presented and placed into the large spectrum of social problems afflicting Indian society. Some quantitative comparisons are made with a similar study conducted in 1964.Trend analyses were performed, and projections are provided relevant to total, adult, and juvenile Indian arrest; rates of arrest for Total, UCR Part I, and alcohol-related offenses are also given. Indian crime data are compared with those of other ethnic groups. The Indian propensity for arrests involving alcohol-related offenses is discussed in detail.The frequency of crimes on- and off-reservation is analyzed, particularly with respect to violent crimes; data are examined to determine the most frequent types of police contacts that Indian offenders experience. 相似文献
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