相关实验视频
Updated: Jun 23, 2025

13:51
Cross-Modal Multivariate Pattern Analysis
Published on: November 9, 2011
19.9K
隐藏手枪许可证申请的趋势和模式:一个多州分析
Harel Shapira1, Katherine Jensen1, Ken-Hou Lin1
1The University of Texas at Austin, TX, USA.
概括
隐藏手枪许可证 (CHL) 的申请量正在增加,申请者之间存在显著的性别和种族差异,以及拒绝率. 男人和白人更有可能申请并获得CHL的批准.
科学领域:
- 犯罪学 犯罪学
- 公共政策 公共政策
- 社会学 社会学 社会学
背景情况:
- 最近的立法已经使隐藏的手枪许可证 (CHL) 的获取变得更容易.
- 关于CHL申请人的人口统计和特征的数据有限.
- 了解申请人个人资料对于政策评估至关重要.
研究的目的:
- 分析CHL申请人的人口趋势和特征.
- 为了确定CHL申请率和结果的差异.
- 为了比较不同州法律框架的CHL申请人模式.
主要方法:
- 使用信息自由法要求获取CHL申请人数据.
- 分析了来自五个州的人口统计数据:佛罗里达州,印第安纳州,马萨诸塞州,德克萨斯州和犹他州.
- 比较申请率,人口特征和拒绝结果.
主要成果:
- 在研究的各个州,CHL的申请正在迅速增加.
- 存在显著的性别差异,男性申请率远高于女性.
- 种族差异是显而易见的,白人比黑人更频繁地申请和获得批准.
- 在佛罗里达州和犹他州,申请中的人口差距随着时间的推移而扩大.
- 与白人申请人相比,黑人申请人面临的拒绝率要高得多.
- 马萨诸塞州是一个可能发行的州,在样本中显示了与应发行的州相似的模式.
结论:
- CHL的收购正在增长,但获得的机会并不公平.
- 政策变化导致了枪支携带的增加,人口差异显著.
- 需要进一步的研究来了解这些趋势的影响.
相关概念视频
Mechanistic Models: Compartment Models in Individual and Population Analysis
36
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
36
Mass Spectrometry: Complex Analysis
743
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
743

