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Armstrong A Babrauskas V Holmes DL Martin C Powell R Riggs S Young LD 《Journal of forensic sciences》2004,49(4):741-748
Tests have determined that boots or shoes of individuals at a fire scene do not transport sufficient contaminants ("tracking") through the fire scene to produce a positive laboratory result for the presence of gasoline in a fire scene that was not present at the time of the fire. Questions about the validity of forensic laboratory results have been raised on the basis that low-level gasoline residues detected in the laboratory samples could have been the result of transporting the residue by footwear contaminated from the fire scene ("tracking"). The data collected in this study establish that "tracking" does not lead to false-positive laboratory results. Canines trained and experienced in the detection of trace ignitable liquid residues were also utilized in this study. The canine results confirmed that properly trained canines show a higher sensitivity than do standard ASTM laboratory techniques for fire debris analysis. In a few cases, canines responded to contamination, but laboratory testing (which is the definitive indicator) did not produce positive results. 相似文献
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Lloyd S. Etheredge 《Policy Sciences》1977,8(2):161-171
Increased size, scope, and visibility of government may strengthen relations of psychological dependence, an unintended aggregate effect of liberal programs. Such an effect depends upon the dominant phenomenological world of the citizenry which intersects objective trends: dependence,éminence grise identification, or enlightened maturity.A model of self-conceptions and emotional syndromes characteristic of the two parties in a dependency relationship predicts there will be objectively inconsistent and unrealistic expectations and demands by both parties, inadequate rationality and program evaluation, and mutual frustration, mistrust, and disillusionment. Trends in American politics suggest the possibility of an increasing dependency substructure. If dependency relations are growing, then the political and administrative problems outlined can be expected to increase.I am indebted to Lynn Etheredge and Jeff Pressman for discussions which partially stimulated this hybrid of topics. 相似文献
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While the physical effects of the attacks on the United States and the corresponding 'war on terrorism' seem to be the most direct consequences of September 11th, the most noteworthy consequence is, in fact, the changing world order and the newly emerging concepts of security. India and Pakistan, based on their geography, politics, and domestic experiences, are two key participants to this war on terrorism. By reviewing the regional relationships, economic impacts, and the Kashmir situation since September 11th, it will be possible to see that the success of this new security order in South Asia is contingent on India and Pakistan's cooperation. The leaders of these two countries will have to balance their domestic challenges and the demands of the international community. 相似文献
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