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排序方式: 共有3003条查询结果,搜索用时 15 毫秒
891.
Erica L. Romsos M.F.S. Julie L. French M.S. Mark Smith B.S. Vincent Figarelli B.S. Frederick Harran M.S. Glenn Vandegrift Lilliana I. Moreno Ph.D. Thomas F. Callaghan Ph.D. Joanie Brocato Ph.D. Janaki Vaidyanathan M.S. Juan C. Pedroso A.A. Andrea Amy B.S. Stephanie Stoiloff M.S. Victor H. Morillo P.S.M. Karina Czetyrko P.S.M. Elizabeth D. Johnson M.S. Jessica de Tagyos M.S.F.S. Ashley Murray B.S. Peter M. Vallone Ph.D. 《Journal of forensic sciences》2020,65(3):953-959
Three commercially available integrated rapid DNA instruments were tested as a part of a rapid DNA maturity assessment in July of 2018. The assessment was conducted with sets of blinded single-source reference samples provided to participants for testing on the individual rapid platforms within their laboratories. The data were returned to the National Institute of Standards and Technology (NIST) for review and analysis. Both FBI-defined automated review (Rapid DNA Analysis) and manual review (Modified Rapid DNA Analysis) of the datasets were conducted to assess the success of genotyping the 20 Combined DNA Index System (CODIS) core STR loci and full profiles generated by the instruments. Genotype results from the multiple platforms, participating laboratories, and STR typing chemistries were combined into a single analysis. The Rapid DNA Analysis resulted in a success rate of 80% for full profiles (85% for the 20 CODIS core loci) with automated analysis. Modified Rapid DNA Analysis resulted in a success rate of 90% for both the CODIS 20 core loci and full profiles (all attempted loci per chemistry). An analysis of the peak height ratios demonstrated that 95% of all heterozygous alleles were above 59% heterozygote balance. For base-pair sizing precision, the precision was below the standard 0.5 bp deviation for both the ANDE 6C System and the RapidHIT 200. 相似文献
892.
Recent research has shown an increasing interest in the historical evolution of legislative institutions. The development of the UK Parliament has received particularly extensive attention. In this article, we contribute to this literature in three important ways. First, we introduce a complete, machine-readable data set of all the Standing Orders of the UK House of Commons between 1811 and 2015. Second, we demonstrate how this data set can be used to construct innovative measures of procedural change. Third, we illustrate a potential empirical application of the data set, offering an exploratory test of several expectations drawn from recent theories of formal rule change in parliamentary democracies. We conclude that the new data set has the potential to substantially advance our understanding of legislative reforms in the United Kingdom and beyond. 相似文献
893.
Political Behavior - Are citizens willing to accept journalistic fact-checks of misleading claims from candidates they support and to update their attitudes about those candidates? Previous studies... 相似文献
894.
895.
Jenny Hallam Chris Howard Abigail Locke Melissa Thomas 《Journal of Gender Studies》2019,28(3):330-341
Childbirth has been positioned as a life changing event that has profound long-term psychological effects upon women. This paper adopts a community psychology approach to explore the role that the Positive Birth Movement (PBM) may have in tackling negative birth experiences by supporting women before and after birth. Six women who all regularly attend UK-based PBM meetings and had given birth to at least one child participated in one to one semi-structured interviews designed to explore the support they received before, during and after their birth, as well as their experiences with the PBM. A Foucauldian inspired discourse analysis explores themes relating to the lack of support and information provided by the NHS and the function of the PBM as a transformative community space which offers social support and information. Within these themes a focus on neoliberalism, choice and the woman’s position as an active consumer of health care is critically discussed. It is argued that the PBM has the potential to prepare women for positive birth experiences but more attention needs to be paid to the wider contexts that limit women’s ability to make ‘free’ choice. 相似文献
896.
The process of coalition formation following the 2017 Bundestag election was the most difficult in German post-war history. For the first time, Germany saw negotiations fail, a minority government being discussed as a real possibility, and the federal president involved as formateur in coalition politics. The aim of this contribution is to explain why government formation was so intricate after the 2017 election. To this end, we trace patterns of party politics and the development of the German party system since 2013. We then study general patterns of government formation at the regional and national levels since the 1990s and evaluate whether these have changed with the advent of the right-wing populist party, Alternative for Germany. Our analysis of the 2017–2018 government formation is based on a novel expert survey of the policy profiles of German parties on various issue dimensions, conducted in 2017. The results show that the continuation of the incumbent coalition government of Christian and Social Democrats was the most likely outcome, and that the Social Democrats were indeed able to enforce a surpassing share of their policy positions in the final negotiation rounds. 相似文献
897.
This paper contributes to the research strand within empirical democratic theory dedicated to operationalizing representation and measuring levels of responsiveness. It discusses the merits and limits of the criterion of responsiveness for assessing the functioning of representative institutions. It builds on comparative findings about the susceptibility of party hierarchies to capture by relatively privileged segments of society, and on comparative findings about the consequences of policy packaging. It posits these as two crucial mechanisms that help account for the propensity of the democratic arena to become a relatively autonomous, privileged site for the construction of ideological hegemony. Furthermore, it presents original data from an elite survey of members of regional parliaments in Spain to illuminate the role of representative institutions and parties in recent efforts to forge and consolidate a particular type of ideological hegemony—micro-nationalist hegemony—in Catalonia and the Basque Country. It contrasts and explains the political dynamics operative in the two regions, emphasizing the divergent trajectories of left-wing party construction. In so doing, it contributes to the literature on nationalism as well, by honing in on the neglected arena of democratic politics as a critical site where the struggle for the success of nationalist hegemonic projects takes place. 相似文献
898.
E. Thomas Ewing 《Women's history review》2013,22(3):451-477
This article explores how Soviet political identities were shaped by maternal concerns and how mothers’ practices were shaped by the professional obligations of teaching in the Stalinist 1930s. Exploring an occupation that became more female as it became more modern, a professional identity that denied or constrained female sexuality, a calling devoted to children that left little time for motherhood, and a social role that assigned the task of socialization to women who did not enjoy full civic rights, this study examines the ways that Stalinist mother teachers assumed a distinct identity through their practices at school and in the family. Identifying specific moments where these questions became public focuses attention on maternity and modernity in ways that illustrate how fully Stalinist repression penetrated into society and how the Soviet people perceived, accepted, challenged, or otherwise mediated the contradictory nature of these political forces. 相似文献
899.
THE INTERNAL AND EXTERNAL VALIDITY OF THE REGRESSION DISCONTINUITY DESIGN: A META‐ANALYSIS OF 15 WITHIN‐STUDY COMPARISONS 下载免费PDF全文
Duncan D. Chaplin Thomas D. Cook Jelena Zurovac Jared S. Coopersmith Mariel M. Finucane Lauren N. Vollmer Rebecca E. Morris 《Journal of policy analysis and management》2018,37(2):403-429
Theory predicts that regression discontinuity (RD) provides valid causal inference at the cutoff score that determines treatment assignment. One purpose of this paper is to test RD's internal validity across 15 studies. Each of them assesses the correspondence between causal estimates from an RD study and a randomized control trial (RCT) when the estimates are made at the same cutoff point where they should not differ asymptotically. However, statistical error, imperfect design implementation, and a plethora of different possible analysis options, mean that they might nonetheless differ. We test whether they do, assuming that the bias potential is greater with RDs than RCTs. A second purpose of this paper is to investigate the external validity of RD by exploring how the size of the bias estimates varies across the 15 studies, for they differ in their settings, interventions, analyses, and implementation details. Both Bayesian and frequentist meta‐analysis methods show that the RD bias is below 0.01 standard deviations on average, indicating RD's high internal validity. When the study‐specific estimates are shrunken to capitalize on the information the other studies provide, all the RD causal estimates fall within 0.07 standard deviations of their RCT counterparts, now indicating high external validity. With unshrunken estimates, the mean RD bias is still essentially zero, but the distribution of RD bias estimates is less tight, especially with smaller samples and when parametric RD analyses are used. 相似文献
900.