The versatility of isotope ratio mass spectrometry is demonstrated by reference to diverse case studies. Variations in the natural isotopic composition of non-biological, organic materials are compared as a means by which samples may be associated or discriminated. These techniques may be used to augment or compliment conventional forensic methodologies. delta13C analysis was used to demonstrate that different masking tape had been recovered in two, apparently similar cases, involving the smuggling of money. Visually similar ecstasy tablets were compared by consideration of the delta13C and delta15N composition of MDMA extracted from the tablets. Although only a limited number of tablets were analysed, the isotopic similarity between two different seizures was sufficient to induce a guilty plea from a person suspected of possessing both. A combination of delta2H, delta13C, delta15N and delta18O together with GC-MS analyses were applied to small samples of seized heroin. Although GC-MS analysis indicated differences between the chemical composition of two of the heroin samples, isotopic analysis suggested similarities, which were confirmed by further delta2H, delta13C and delta18O isotopic analysis of the clingfilm in which the samples were wrapped. 相似文献
Information sharing research has largely focused on capturing operational practices related to the exchange of information. A noticeable shortcoming of this developing literature is the lack of scholarly attention focused specifically on analytic personnel. The present study employs semi-structured interviews with 23 personnel that comprise the analytic unit within a regional fusion center located in a large metropolitan area in the United States. Findings indicate that there is significant ambiguity surrounding the organizational and geographic audiences to which intelligence products should be tailored. Moreover, it appears information sharing is sparse and reliant upon personal relationships between analysts and external organizations. Lastly, analysts do not receive feedback pertaining to the content and effectiveness of intelligence products created. These findings may be generalized to other analytical organizations whose primary goal is to gather, analyze and disseminate intelligence. Action steps for policymakers are provided. 相似文献
I report estimates for a fixed-effects model of country-level Gini coefficients as a function of economic freedom along with relevant control variables. Gini coefficients are drawn from the UNU/WIDER World Income Inequality Database Version 2.0a, while economic freedom is measured by the Fraser Institute's Economic Freedom of the World index. Controls are included for per capita income, political structure, education, demographics, and industrial composition. Over a broad range of freedom, the estimated relation between economic freedom and income inequality is positive, statistically significant, but relatively inelastic. 相似文献
A key question in understanding regulation through independent intermediaries is the extent to which intermediary actions are either coordinated, thereby supporting consistency in regulatory application, or uncoordinated, leading to monitoring and enforcement disparities. This paper examines professional associations as one mechanism by which policy action may be coordinated in decentralized arrangements. Professional associations provide means and venues for members to interact, offer training and education that develops shared understanding of policy directives, are collective representation bodies for professional members, and may play an important role in establishing and enforcing collective standards for appropriate behavior. We examine these functions in the decentralized administration of United States organic food certification, focusing on two relevant professional associations – the Accredited Certifiers Association and the International Organic Inspectors Association. Drawing on multiple methods, including interviews and survey data, our findings indicate that professional organic certification associations provide valuable education and training, disseminate information, and facilitate knowledge sharing among administrative entities and with regulatory authorities. We conclude with a discussion of the prospects and limitations of professional associations for third‐party regulation, and how accounting for professional association functions can improve our understanding of regulatory intermediary coordination and conduct. 相似文献
Among the more recognizable programs related to natural and sustainable food is the United States Department of Agriculture’s National Organic Program. Although the robustness of the organic food market is difficult to contest, many debate the extent to which U.S. organic policy outcomes adequately serve consumers and the organic agriculture producers they rely on. This paper engages the debate from the perspective of certified organic producers. Drawing on the results of a nationwide survey of USDA‐certified producers, we first provide a snapshot of how producers assess the environmental, consumer, and market impacts of U.S. organic food policy. We then examine the extent to which organic producers’ policy impact perceptions are associated with their alignment with an “organic ethos”—understood as producers’ commitment to core organic principles and the organic movement. The paper highlights producers’ values as perceptual filters and cognitive mechanisms that help shape producers’ policy impacts perceptions, illustrating a contributing factor to the enduring nature of organic policy debates. 相似文献
School leaders’ experiences and perceptions of students’ domestic violence experiences and trauma-informed school interventions have been overlooked. This semi-structured qualitative study aimed to investigate three areas regarding school leaders’ perceptions regarding domestic violence-exposed students: 1) the experiences of school leaders in dealing with these students; 2) the barriers and strengths associated with managing these students; and 3) school leaders’ recommendations for overcoming any barriers related to this issue in schools. Interviews conducted with 15 school leaders were analysed using thematic analysis. School leaders were found to be instrumental in influencing school culture and support systems surrounding students’ exposure to domestic violence. However, school leaders provided mixed reports regarding the adequacy of resources for domestic violence-exposed students. Recommendations suggested by school leaders included more domestic violence specific training for school staff and training delivery methods that were more sensitive for staff who have personal experiences with domestic violence. School leaders expressed great concerns for teachers, particularly less experienced teachers, regarding their knowledge and skills to assist students who disclose family violence.
The use of Internet filters in public classrooms in the USA has been intensely debated, both in terms of its effectiveness and legality. The debate pits concerns to protect students from indecent material against issues of unconstitutional censorship. This paper examines the legal issues addressed in various rulings by the US Supreme Court pertinent to issues raised in the debate over the constitutionality of filtering in the classroom. The rulings and opinions offer valuable insights into the legal issues raised in this debate. 相似文献