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271.
Elemental Characterization and Discrimination of Nontoxic Ammunition Using Scanning Electron Microscopy with Energy Dispersive X‐Ray Analysis and Principal Components Analysis 下载免费PDF全文
Seth R. Hogg Ph.D. Brian C. Hunter M.D. Ruth Waddell Smith Ph.D. 《Journal of forensic sciences》2016,61(1):35-42
Concerns over the toxic by‐products produced by traditional ammunition have led to an increase in popularity of nontoxic ammunition. In this work, the chemical composition of six brands of nontoxic ammunition was investigated and compared to that of a road flare, which served as an environmental source with similar composition. Five rounds of each brand were fired while a further five were disassembled and the primer alone was fired. Particles collected from all samples, including the road flare, were analyzed by scanning electron microscopy with energy dispersive X‐ray analysis. Common elements among the different ammunition brands included aluminum, potassium, silicon, calcium, and strontium. Spectra were then subjected to principal components analysis in which association of the primer to the intact ammunition sample was generally possible, with distinction among brands and from the road flare sample. Further, PCA loadings plots indicated the elements responsible for the association and discrimination observed. 相似文献
272.
This study is the first to examine reflective functioning (RF) and direct parent–child interactions of fathers with concurrent intimate partner violence (IPV) perpetration and substance abuse (SA) problems. Twenty-four fathers, with children between the age of one and seven, completed a structured interview to assess RF, self-report measures of hostile-aggressive parenting behaviors, IPV perpetration severity, SA severity, and a coded play session with their children. Results of three simultaneous multiple regressions revealed that RF in fathers was not associated significantly with observed parenting behaviors. However, fathers’ SA severity emerged as a significant predictor for child avoidant behavior and dyadic tension, and fathers’ IPV perpetration severity contributed unique variance to child avoidant behavior and dyadic constriction. These results suggest that fathers’ SA severity and IPV perpetration behaviors may be more salient factors in predicting their father-child interactions than paternal RF. 相似文献
273.
Hilary A. Smith Andrea L. Wolfe-Clark Craig J. Bryan 《Journal of Police and Criminal Psychology》2016,31(4):295-303
Research suggests that social support and mental toughness (i.e., the ability to effectively cope with stress despite adversity and/or failure) may be associated with decreased suicide risk, although methods for measuring mental toughness remain largely undeveloped. The relationship remains largely unknown. In response to this research gap, the psychometric properties of the Mental Toughness Psychological Skills Profile (MTPSP; Asken 2005), and its association with suicide ideation, were evaluated in a sample of active duty U.S. Air Force Security Forces personnel, a subpopulation especially vulnerable to suicide risk. 273 participants from two Air Force bases completed self-report scales including the MTPSP. Results indicated that the MTPSP is comprised of five subscales: Negative Mindset, Positive Mindset, Confidence, Achievement, and Health Behaviors. All five MTPSP factors were independently correlated with general distress, somatic anxiety, positive affect, presence of meaning in life, search for meaning in life, positive self-bias, social support sources, and suicide ideation. The Confidence factor was the only factor that had a significant association with suicide ideation when all five factors were considered simultaneously (β?=??0.18, p?=?.016), but was fully mediated by social support (β?=??0.17, p?=?.033). Self-confidence may be associated with reduced suicide risk because those individuals tend to report higher social support. 相似文献
274.
Adam Dobrin Justin J. Smith Jennifer H. Peck Ken Mascara 《American Journal of Criminal Justice》2016,41(3):522-538
With growing numbers of female staff in correctional settings, issues relating to promotional fairness are certain to occur. Historically, female detention staff held perceptions of being discriminated against in the promotional process due to gender biases. However, there is almost no recent examination of these perceptions. The current study addresses this shortcoming in the literature by using a sample of 362 sworn detention deputies ranked Sergeant and below at a large southern-central United States jail. Contrary to the data from a generation ago, more male detention staff perceive gender biases in the promotional process than females, and report that promotional decisions are based on arbitrary and informal factors. Women are more likely to perceive promotions to be fair and based on merit. Results are discussed in relation to two theoretical perspectives: the importation-differential experiences model, and the work-role prisonization model. 相似文献
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Federalism was not an explicitly prominent feature of the 2000presidential election, but it exerted significant influencein shaping the political landscape as well as the candidates'positions on the role and purposes of the federal government.America's federal system created powerful undercurrents thatinfluenced the selection of the two major presidential candidates,the campaign issues, and the candidates' messages. At the sametime, George W. Bush and Albert Gore differed considerably intheir answers to how the United States' federal system shouldfunction and the objectives it should seek. Bush favored a federalgovernment that promotes economic opportunity through a marketplaceand allows state and local governments to determine their ownmoral and policy objectives. Gore preferred a national commonwealth,where the federal government determines the moral objectivesand the states cooperate to achieve those objectives. 相似文献
280.
Balanced budget requirements (BBRs) affect all aspects of financial operations. Previous studies relied on characterizations that highlight a constitutional-statutory distinction. Hou and Smith (Public Budgeting & Finance 26(3):22–45, 2006) instead propose a political-technical construct. This article uses probit estimation, six measures of balance, and long panels to test which framework offers more explanatory power. The findings suggest that BBRs matter to varying degrees. Technical requirements exert bigger effects than political ones, the effects are more obvious on narrower than broader measures of balance and in the later phases of the budget cycle, and the political-technical construct offers more explanatory power than the constitutional-statutory distinction. 相似文献