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排序方式: 共有378条查询结果,搜索用时 15 毫秒
91.
92.
DNA analysis of maggot crop contents can be used to identify a missing body or aid entomologists with interpreting evidence used for PMI estimations. Entomological evidence is often collected and preserved to keep identifiable external features intact. The preservation methods currently in use may not be suitable for preserving DNA in the maggot crop for later analysis. In this study, carrion maggots raised on human tissue were preserved under the following 8 preservation conditions: no fluid at -70 degrees C, no fluid at 4 degrees C, no fluid at 24 degrees C, 70% ethanol at 4 degrees C, 70% ethanol at 24 degrees C, 95% ethanol at 24 degrees C, Kahle's solution at 24 degrees C and formaldehyde at 24 degrees C. Maggots were dissected following 2 weeks, 8 weeks and 6 months of preservation. The maggot crops were extracted, human DNA was quantitated, and an attempt was made at amplifying mitochondrial DNA (mtDNA) and short tandem repeat (STR) loci. Both mtDNA and STRs were successfully amplified from maggots stored in ethanol or without any preservation fluid. Formalin-containing preservation solutions reduced the recovery of DNA. The best results were observed from maggots stored without any preservation fluid at -70 degrees C. 相似文献
93.
Civic engagement and collaborative public management are concepts that are defined broadly, making theoretical explication challenging and practical application of empirical research difficult. In this article, the authors adopt definitions of civic engagement and collaborative public management that are centered on the citizen and the potential for active citizenship. Following a historical review of civic engagement in the United States, a conceptual model of five approaches to civic engagement is offered. Citizen-centered collaborative public management is enhanced through these approaches. The authors suggest the need for further empirical research on collaborative public management that is grounded in citizenship action. 相似文献
94.
Jack S. Levy 《Political science quarterly》2002,117(4):697-698
95.
Jack L. Knetsch 《Journal of policy analysis and management》1995,14(1):68-78
Recent empirical studies indicate that many standard economic assumptions used in policy analyses do not reflect people's preferences and choices as well as modifications based on behavioral findings. Differences in the areas of time preferences and the large disparity between valuations of gains and losses illustrate the issues and the distortions that present analyses likely impose. 相似文献
96.
97.
Gabriel Eidelman Jack Lucas 《Canadian public administration. Administration publique du Canada》2023,66(1):78-95
While past research suggests that informal processes of dialogue play an important role in municipal intergovernmental relations in Canada, we currently know very little about their character and frequency. Who do local elected officials communicate with, and through which channels? And which municipal voices carry the most weight in these conversations? This article answers these questions from the perspective of elected politicians themselves, using a pan-Canadian survey of municipal, provincial, and federal elected representatives. Our findings confirm that municipal intergovernmental relations depend heavily on informal institutions and personal relationships and highlight the key role of municipal mayors as spokespersons and advocates for municipalities in Canadian federalism. 相似文献
98.
Anil Bamezai Glenn A Melnick Joyce M Mann Jack Zwanziger 《Journal of policy analysis and management》2003,22(1):65-84
In the selective contracting era, consumer choice has generally been absent in most state Medicaid programs, including California's (called Medi-Cal). In a setting where beneficiary exit is not a threat, a large payer may have both the incentives and the ability to exercise undue market power, potentially exposing an already vulnerable population to further harm. The analyses presented here of Medi-Cal contracting data, however, do not yield compelling evidence in favor of the undue market power hypothesis. Instead, hospital competition appears to explain with greater consistency why certain hospitals choose to contract with Medi-Cal while others do not, the trends in inpatient prices paid by Medi-Cal over time, and the effect of price competition on service cutbacks, such as emergency room closures. Copyright 2003 by the Association for Public Policy Analysis and Management. 相似文献
99.
Jack Garland B.Med. Benjamin Ondruschka M.D. Simon Stables M.B.Ch.B. Paul Morrow M.D. Kilak Kesha M.B.B.S. Charley Glenn M.D. Rexson Tse M.D. 《Journal of forensic sciences》2020,65(6):2019-2022
Postmortem computed tomography (PMCT) is a relatively recent advancement in forensic pathology practice that has been increasingly used as an ancillary investigation and screening tool. One area of clinical CT imaging that has garnered a lot of research interest recently is the area of “artificial intelligence” (AI), such as in screening and computer-assisted diagnostics. This feasibility study investigated the application of convolutional neural network, a form of deep learning AI, to PMCT head imaging in differentiating fatal head injury from controls. PMCT images of a transverse section of the head at the level of the frontal sinus from 25 cases of fatal head injury were combined with 25 nonhead-injury controls and divided into training and testing datasets. A convolutional neural network was constructed using Keras and was trained against the training data before being assessed against the testing dataset. The results of this study demonstrated an accuracy of between 70% and 92.5%, with difficulties in recognizing subarachnoid hemorrhage and in distinguishing congested vessels and prominent falx from head injury. These results are promising for potential applications as a screening tool or in computer-assisted diagnostics in the future. 相似文献
100.
Jack Corbett Xu Yi-Chong Patrick Weller 《Cambridge Review of International Affairs》2018,31(2):183-202
AbstractThe unequal participation of member states in international organizations (IOs) undermines IOs’ legitimacy as global actors. Existing scholarship typically makes this assessment by referencing a combination of input—the interests IOs serve—and output—the decisions they take. This scholarship does not, however, pay enough attention to how IOs have responded to these concerns. We argue that IOs have used the participation of small states—whose membership most studies typically ignore—as an important means of generating what Vivian Schmidt calls ‘throughput’ legitimacy for their operations. We organize our analysis of ‘throughput’ legitimacy in IOs around four institutional mechanisms—(1) agenda setting; (2) leadership (s)election; (3) management and operation; and (4) service delivery—in which all states seek to exert influence. What emerges is an account of IOs seeking to balance ‘inputs’ and ‘outputs’ by way of ‘throughputs’. We conclude by arguing for an expanded focus on the means by which IOs generate ‘throughput’ legitimacy in future research. 相似文献