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901.
Building upon and expanding the previous research into structural determinants of homicide, particularly the work of Land, McCall, and Cohen (1990), the current paper introduces a multilevel theoretical framework that outlines the influences of three major structural forces on homicidal violence. The Big Three are poverty/low education, racial composition, and the disruption of family structure. These three factors exert their effects on violence at the following levels: neighborhood/community level, family/social interpersonal level, and individual level. It is shown algebraically how individual-level and aggregate-level effects contribute to the size of regression coefficients in aggregate-level analyses. In the empirical part of the study, the presented theoretical model is tested using county-level data to estimate separate effects of each of the Big Three factors on homicide at two time periods: 1950–1960 and 1995–2005 (chosen to be as far removed from one another as the availability of data allows). All major variables typically used in homicide research are included as statistical controls. The results of analyses show that the effects of the three major structural forces—poverty/low education, race, and divorce rates—on homicide rates in US counties are remarkably strong. Moreover, the effect sizes of each of the Big Three are found to be identical for both time periods despite profound changes in the economic and social situation in the United States over the past half-century. This remarkable stability in the effect sizes implies the stability of homicidal violence in response to certain structural conditions.  相似文献   
902.
903.
The international harmonization of technology‐related regulations seeks certain norms across diverse contexts. Harmonization efforts are based primarily on the promulgation of state‐centered command and control forms of regulation, though they may also be accompanied by the diffusion of more plural approaches that are decentered from the state. We contrast the ways in which the “proper” use of transgenic cotton seed technologies is understood in harmonizing regulations with the way this technology is used in practice in regions of Argentina and China. We find divergence that poses challenges for both state‐centered and decentered approaches to harmonization. While state‐centered approaches are blind to some critical processes on the ground, decentered strategies are found wanting in situations where norms remain deeply contested amongst actors situated in very uneven power relations. In both cases, we find that establishing and securing norms that are socially just and environmentally sustainable means attending much more explicitly to the political economies in which technological practices actually take root.  相似文献   
904.
Grounded theory guided the analysis of 30 in-depth interviews with raped women and community members who had supported raped women in their contact with the police and health care services in Tanzania. The aim of this study was to understand and conceptualize the experiences of the informants by creating a theoretical model focusing on barriers, strategies, and responses during the help seeking process. The results illustrate a process of managing in the contemporary world characterized as walking a path of anger and humiliation. The barriers are illustrated by painful experiences of realizing it's all about money, meeting unprofessionalism and irresponsibility, subjected to unreliable services, and by being caught in a messed-up system. Negotiating truths and knowing what to do capture the informants' coping strategies. The study indicates an urgent need for improvement in the formal procedures of handling rape cases, improved collaboration between the police and the health care system, as well as specific training for professionals to improve their communication and caring skills.  相似文献   
905.
An effective way to reveal the history of drug abuse is to determine the parental drug and its metabolites in hair. Here, a quantitative HPLC-Chip-MS/MS method was developed for simultaneous measurement of ketamine and its metabolite norketamine in human hair. Ketamine and norketamine were extracted from hair by acid hydrolysis, and then enriched by organic solvent extraction. The chromatographic separation was achieved in 15 min, with the drug identification and quantification by a tandem mass spectrometer. The linear regression analysis was calibrated by deuterated internal standards with a R(2) of over 0.996. The limit of detection (LOD) and the limit of quantification (LOQ) for ketamine and norketamine were 0.5 and 1 pg/mg of hair, respectively. The standard curves were linear from the value of LOQ up to 100 pg/mg of hair. The validation parameters including selectivity, accuracy, precision, stability and matrix effect were also determined. In conclusion, this method was able to reveal the present of ketamine and norketamine with less hair from the drug abusers, and which had the sensitivity of ~1000-fold higher than the conventional method. In addition, the amount of ketamine and norketamine being detected in different hair segments would be useful in revealing the historical record of ketamine uptake in the drug abusers.  相似文献   
906.
Research on the fulfilment of electoral promises has been particularly fruitful over the past decades. Most of it focused on examining pledge fulfilment at the cabinet level, and little emphasis was placed on the reasons underlying the level of compliance. As a consequence, core factors in explaining pledge fulfilment have not yet been explored. One such factor might be instability in a government's internal functioning. We argue that ministerial instability is relevant for explaining a government's broken promises, and that its importance increases at the junior minister level and among the most salient ministries. Relying on data on the fulfilment of electoral promises and ministerial instability in Portugal between 1995 and 2019, backed by interviews with former ministers and junior ministers, we provide evidence that the fulfilment of electoral promises is significantly influenced by portfolio volatility, particularly at the junior ministerial level and in the most important ministries.  相似文献   
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