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Cullum HE McGavigan C Uttley CZ Stroud MA Warren DC 《Journal of forensic sciences》2004,49(4):684-690
This survey was carried out as a follow-up to a 1994 survey carried out by this laboratory (1) in order to determine the background levels of explosives traces in public places. The first survey concentrated on transport areas and police stations in and around London. This second study examines levels in four of the United Kingdom's major cities: Birmingham, Cardiff, Glasgow, and Manchester. Samples were taken at various transport sites and from hotels, private houses, private vehicles, and clothing. The survey showed that traces of the high explosives nitroglycerine (NG), trinitrotoluene (TNT), pentaerythritol tetranitrate (PETN), and cyclotrimethylene trinitramine (RDX) are rare within the general public environment. Only one low-level trace of RDX was detected. NG, possibly associated with the use of firearms, was detected at low levels in two samples and 2,4-DNT was detected in a separate sample. No PETN was detected in any of the samples. The results of the survey indicate that it is unlikely that persons visiting public areas could become significantly contaminated with explosives. The analytical procedures employed would also have detected ethylene glycol dinitrate (EGDN) if present at levels greater than 2 ng, nitrobenzene (NB) if present at levels greater than 50 ng, mononitrotoluenes if present at levels greater than 50 ng, and the other common isomers of dinitrotoluene if these had been present at levels in excess of 10 ng. None of these were detected. The relatively high volatility of EGDN, NB, and the mononitrotoluenes would, however, cause traces of these compounds to disperse rapidly. A proportion of the samples (approximately 7%) were analyzed for the presence of HMX. No HMX was detected. 相似文献
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Hazel M. Prelow Scott R. Weaver Rebecca R. Swenson 《Journal of youth and adolescence》2006,35(4):506-516
Structural equation modeling was used to test [Sandler, American Journal of Community Psychology 29: 19–61.] a theoretical model of risk and resilience in an urban sample of African American and European American adolescents. The aims of the present study were to examine whether self-system processes (i.e., competence, self-esteem, and coping efficacy) mediated the relations between ecological risk and depressive symptoms and to determine if pathways varied across ethnic/racial groups. Results implicate self-esteem as a putative mediator of the impact of ecological risk on depressive symptoms for both African American and European American youth. In addition, coping efficacy was a mediator of the link between ecological risk and depressive symptoms for African American youth, but not for European American youth. The evidence supporting competence as a significant mediator of the relation between ecological risk and depressive symptoms was less compelling. Findings suggest substantial similarities in the pathways between ecological risk and depressive symptoms across African American and European American youth.
相似文献
Hazel M. Prelow (Assistant professor)Email: |
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Hazel Biggs 《Feminist Legal Studies》2011,19(1):83-91
This commentary explores the background to, and implications of, the recently published Director of Public Prosecutions guidelines
for prosecutors in respect of cases of encouraging or assisting suicide. It considers the extent of the provisions and questions
the legitimacy of their focus on the compassionate motivation of the assistant, and the apparent prohibition on healthcare
professionals providing such help. It concludes by suggesting that a permissive change in the law would provide better safeguards
for those who seek assisted dying. 相似文献
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Abstract Eliciting useful and reliable disclosures from sex offenders is imperative for effective risk management. Responsiveness to accurate self-report by sexual offenders of their risky thinking and problematic behaviours ensures that offenders are dealt with at the correct risk level. This requires practitioners to use a range of constructive strategies and techniques for eliciting disclosures. Drawing on a recent study that investigated the nature and usefulness of disclosures, this paper explores the inherent challenges and identifies best practice in this important area of work. 相似文献
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Hazel Kemshall 《Journal of Sexual Aggression》2013,19(3):331-343
Abstract Work with sex offenders takes place in a climate of public blame and anxiety. This requires practitioners to adopt the highest standards of practice to ensure that defensible decisions are made. These are decisions that must withstand hindsight scrutiny in the light of a risk management failure. This paper reviews the key practice points that will assist practitioners in making defensible decisions, and the key challenges for practitioners in this challenging area of work. 相似文献