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تعداد نتایج: 15003 فیلتر نتایج به سال:
IC ER SPTIVES On contentious issues such as gun control, where advocacy groups on both sides claim to have the weight of public opinion behind them, polling can help clarify what Americans really think. Three decades of polling have painted a clear picture of public opinion about gun control. These polls show that public support for the regulation of firearms is strong, deep, and widespread. La...
• Cost saving The gun turret drive on a combat vehicle presents a very complex design challenge. When the vehicle travels over rough terrain, the gun turret drive compensates for the vehicle’s motion and keeps the gun pointed precisely at its target with 99.5% accuracy. In the past, General Dynamics Land Systems (GDLS) engineers used separate simulations to evaluate different aspects of the gun...
BACKGROUND It has been suggested that the vitamin D receptor (VDR) gene BsmI-polymorphism is a genetic determinant of bone metabolism. DESIGN To test this hypothesis, the relationship between VDR genotypes, bone mineral density (baseline and after 18 months) and parameters of calcium metabolism and bone turnover were investigated prospectively in 88 haemodialysed patients not receiving active...
BACKGROUND There are few studies that address temporal variation in firearm associated injuries. It was the purpose of this study to analyze the temporal variation in the types and patterns of injuries associated with firearm use from a national data base. METHODS The database used was the Inter-University Consortium for Political and Social Research Firearm Injury Surveillance Study 1993-200...
OBJECTIVE To describe the incidence and circumstances of nonfatal firearm-related injuries among children and adolescents treated in US emergency departments. DESIGN Data were obtained from the Firearm Injury Surveillance Study, 1993-1997; data were collected through medical record review at hospitals participating in the National Electronic Injury Surveillance System. SETTING The hospitals...
This comment on Thomas Marvell’s “The Impact of Banning Juvenile Gun Possession” analyzes Marvell’s empirical findings and their policy implications for gun control legislation. While Marvell’s article stresses the absence of any finding favorable to juvenile gun bans, this comment points out that the statistical results actually support the stronger finding that some of the juvenile gun bans a...
BACKGROUND Vitamin D and the vitamin D receptor (VDR) are important in the metabolic processes that affect bone mineral density (BMD). However, the effect of VDR BsmI polymorphism on BMD in pediatric patients is still unclear. METHODS Eligible studies were identified from the following electronic databases: PubMed, Embase, the Cochrane Library, and the Chinese CNKI and Wanfang databases befor...
Gun violence is related to substantial morbidity and mortality with surrounding discussions framed and shaped by the media. This study's objective was to explore national news media's reporting of gun violence around a mass shooting. National news pieces were coded according to categories of gun violence, media frames, entities held responsible, responses, and reporting of the public heath appr...
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