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排序方式: 共有189条查询结果,搜索用时 31 毫秒
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Sholts SB Walker PL Kuzminsky SC Miller KW Wärmländer SK 《Journal of forensic sciences》2011,56(2):333-338
Identifying group affinity from human crania is a long-standing problem in forensic and physical anthropology. Many craniofacial differences used in forensic skeletal identification are difficult to quantify, although certain measurements of the midfacial skeleton have shown high predictive value for group classifications. This study presents a new method for analyzing midfacial shape variation between different geographic groups. Three-dimensional laser scan models of 90 crania from three populations were used to obtain cross-sectional midfacial contours defined by three standard craniometric landmarks. Elliptic Fourier transforms of the contours were used to extract Fourier coefficients for statistical analysis. After cross-validation, discriminant functions based on the Fourier coefficients provided an average of 86% correct classifications for crania from the three groups. The high rate of accuracy of this method indicates its usefulness for identifying group affinities among human skeletal remains and demonstrates the advantages of digital 3D model-based analysis in forensic research. 相似文献
43.
Estrada-Martínez LM Padilla MB Caldwell CH Schulz AJ 《Journal of youth and adolescence》2011,40(8):1039-1051
Existing research rarely considers important ethnic subgroup variations in violent behaviors among Latino youth. Thus, their
risk for severe violent behaviors is not well understood in light of the immense ethnic and generational diversity of the
Latino population in the United States. Grounded in social control theory and cultural analyses of familism, we examine differences in the risk for severe youth violence, as well its associations with family cohesion, parental engagement,
adolescent autonomy, household composition, and immigrant generation among Mexican (n = 1,594), Puerto Rican (n = 586), Cuban
(n = 488), and non-Latino Black (n = 4,053), and White (n = 9,921) adolescents with data from the National Longitudinal Study
of Adolescent Health. Results indicate a gradient of risk; White youth had the lowest risk for severe violence and Puerto
Rican youth had the highest risk compared to all other racial/ethnic subgroups. Within-group analysis indicates that family
factors are not universally protective or risk-inducing. While family cohesion decreased the risk of severe violence among
all groups, parental engagement was associated with increased risk among Blacks and Whites, and adolescent autonomy was associated
with increased risk among Puerto Ricans and Cubans. In addition, Cuban and White adolescents who lived in single parent households
or who did not live with their parents, had higher risk for severe violent behaviors than their counterparts who lived in
two parent households. Among Latinos, the association of immigrant generation was in opposite directions among Mexicans and
Cubans. We conclude that family and immigration factors differentially influence risk for violence among Latino subgroups
and highlight the significance of examining subgroup differences and developing intervention strategies that are tailored
to the needs of each ethnic subgroup. 相似文献
44.
Downey LA King R Papafotiou K Swann P Ogden E Stough C 《Forensic science international》2012,220(1-3):e33-e36
dl-3,4-methylenedioxymethamphetamine (MDMA) and methamphetamine are commonly used illicit drugs that are thought to impair driving ability. The Standardized Field Sobriety Tests (SFSTs) are utilized widely to detect impairment associated with drugs other than alcohol in drivers, although limited evidence concerning MDMA and methamphetamine consumption on SFST performance exists. The aim of this study was to evaluate whether the SFSTs were a sensitive measure for identifying the presence of the specific isomer d-methamphetamine and MDMA. In a double-blind, within-subject, counter-balanced and placebo-controlled study, 58 healthy and abstinent recreational drugs users were administered three treatments: 100mg of MDMA, 0.42 mg/kg d-methamphetamine, and placebo. For each condition the SFSTs were administered at 4 and 25 h post treatment. d-methamphetamine was not found to significantly impair SFST performance unlike MDMA, which significantly impaired SFST performance in comparison to placebo with 22% of the sample failing the test at the 4h testing time-point. No differences were observed at the 25 h testing time-point for any of the conditions. It was concluded that the SFSTs are not efficient in identifying the presence of low level d-methamphetamine, and are significantly better at detecting the presence of MDMA at the levels assessed. 相似文献
45.
Phillip Deery 《澳大利亚政治与历史杂志》2012,58(2):181-202
The scholarship on the impact on communists of Khrushchev's “secret speech” to the twentieth Congress of the Communist Party of the Soviet Union in 1956 is limited. Generally it is located within broader studies of organisational upheavals and ideological debates at the leadership level of communist parties. Rarely has there been analysis of the reverberations at the individual level. Consistent with James R. Barrett's pioneering approach, this paper seeks to incorporate the personal into the political, and inject a subjective dimension into the familiar top‐down narrative of American communism. It will do this by focusing on the motivations, reactions and consequences of the defection of one Party member, the writer Howard Fast. It will thereby illuminate the story of personal anguish experienced by thousands in the wake of Khrushchev's revelations about Stalin. 相似文献
46.
Law and Philosophy - 相似文献
47.
Paul Brotherton Phillip Endicott Ross Barnett Alan Cooper 《Forensic Science International: Genetics Supplement Series》2008,1(1):19-21
High levels of non-authentic sequence data can be generated by traditional PCR-based methodologies when DNA is damaged, template numbers are small and/or the target amplification size too large. We therefore present an alternate methodology based on single primer extension (SPEX) amplification; that places no pre-defined size constraints on amplification and interacts with only one of the DNA strands at the target locus. 相似文献
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