基于高阶空间精度格式和嵌套网格对旋翼尾迹捕捉的改进

发展了一种基于高阶迎风格式和嵌套网格捕捉直升机悬停旋翼涡尾迹的方法.无粘通量采用Roe Reimann求解器,使用改进的5阶加权基本无振荡(WENO)格式对交界面左右状态进行高阶插值,并与MUSCL插值进行比较.为便于捕捉尾迹和实施周期性边界条件,计算采用结构嵌套网格,其中高质量的旋翼网格完全嵌套于背景网格中.当解达到近似收敛后在桨尖涡分布区域对背景网格进行加密,如此经过3次得到优化的背景网格.考虑到WENO格式插值的特点,提出了搜索3层洞边界和人工外边界的方法以便插值的直接进行.用该方法对一跨音速和一亚音速悬停旋翼粘性流场进行了数值计算.数值结果表明:所发展方法对涡尾迹具有很高的捕捉能力;与MUSCL格式相比,WENO格式具有较低的数值耗散.     

Term Limits,Campaign Contributions,and the Distribution of Power in State Legislatures

Using campaign contributions to legislators as an indicator of member influence, we explore the impact of term limits on the distribution of power within state legislatures. Specifically, we perform a cross‐state comparison of the relative influence of party caucus leaders, committee chairs, and rank‐and‐file legislators before and after term limits. The results indicate that term limits diffuse power in state legislatures, both by decreasing average contributions to incumbents and by reducing the power of party caucus leaders relative to other members. The change in contribution levels across legislators in different chambers implies a shift in power to the upper chamber in states with term limits. Thus, the impact of term limits may be attenuated in a bicameral system.     

中国共产党与中国特色社会主义事业总体布局

摘要：中国特色社会主义事业总体布局大体经历了四个发展阶段：前期探索阶段、初步形成阶段、完善与充实阶段和重大推进阶段。这是中国共产党在领导人民建设中国特色社会主义的探索实践中不断深化认识的结果,反映出我们党是一个实事求是、与时俱进、开拓创新的马克思主义政党,这必将坚定我们在其领导下实现中华民族伟大复兴的信心。     

Rational choice beyond the classroom: Decision making in offenders versus college students

Purpose

Tests of rational choice theory commonly utilize samples of university students. The current study examines whether these samples provide meaningful insight into real offenders’ decisions.

Methods

A total of 760 undergraduates from a southwestern university and 1,013 offenders incarcerated in the same state were surveyed. Both groups were given a hypothetical drunk driving scenario and completed rational choice questions.

Results

Results indicate that although the samples were very different in their background characteristics (e.g., age, sex, race, prior criminal history), they identified similar costs and benefits of drunk driving, gave similar ratings of the certainty/severity of these consequences, and utilized these consequences to inform their drunk driving intentions in a similar fashion.

Conclusion

Despite social science being largely criticized as the “study of sophomores,” in this instance it appears college student samples can provide meaningful insight into the decision calculus of known offenders. Implications and limitations of the study are presented.     

与时俱进 推动党校教学事业发展

党校工作历来是党的工作的重要组成部分，也是党的建设的一项重要内容。从党校教学事业发展过程，可以清晰地看到党的建设演进轨迹。     

What works (or doesn't) in a DUI court? An example of expedited case processing

Purpose

A number of policy efforts have aimed to reduce drunk driving, including deterrence-based policies and specialized treatment courts. This study examines the impact of expedited court processing on the county-wide rate of DUI offenses. It also examines the links between sanction swiftness, certainty, and severity and changes in DUI rates over time.

Methods

This study uses interrupted time series analysis to assess changes in DUI rates in one county over a time period including the introduction of a full-coverage, expedited court docket for DUI. Additionally, the three components of deterrence were examined.

Result

Findings reveal that the program implementation corresponded with a lower rate of DUI case filings, but not with a general reduction in alcohol-involved collisions in the county. Additionally, only sanction swiftness improved over time, while certainty remained stable and severity declined.

Conclusions

Results indicate that the introduction of the expedited court docket does not appear to have produced a deterrent effect on DUI. It may be that DUI offenders require more than expedited processing to overcome the issues that precipitate their offending. Future research and policy should explore both the impact of swiftness of punishment and the provision of appropriate treatment services in addressing DUI offending.     

The Influence of the Social Bond on Self-control at the Moment of Decision: Testing Hirschi’s Redefinition of Self-control

Hirschi (2004) redefined self-control as the tendency to consider the “full range” of potential costs relevant to a criminal act, suggesting that such costs vary in number and salience based on one’s level of self-control. He also suggested self-control, as expressed at the moment of decision, was influenced by the individual’s level of social bonding; those with fewer bonds would exhibit less self control by considering fewer costs and finding them less salient when making a decision. This study presents an initial attempt to examine Hirschi’s theoretical statement linking concepts from the two theories. Presented with a hypothetical drunk driving scenario, participants were asked to identify perceived costs and salience as a measure of self-control, as Hirschi (2004) suggested. Results support Hirschi’s assertion demonstrating that the social bond impacts offending likelihood through its relationship to self-control expressed within the decision. Future theoretical and empirical directions are outlined.     

Sex Differences in the Health Risk Behavior Outcomes of Childhood Bullying Victimization

Short- and long-term health consequences of bullying victimization are well documented and include physical and mental health issues as well as increased involvement in risky behavior, but research exploring sex differences in victimization outcomes is still limited. This study uses data from the National Longitudinal Survey of Youth—1997 to examine the consequences of victimization by sex and, more specifically, relationships between bullying victimization and later health risk behaviors—including risky sexual activity, smoking, alcohol use, and drug use. Multivariate analyses identified sex differences for specific health risk indicators, and a substantial difference was evident for overall risk.     

SELF-CONCEPT, NEGATIVE FAMILY AFFECT, AND DELINQUENCY: A Comparison Across Mexican Social Classes

Using a semistructured measure to minimize cross-cultural biases, we examined the relationship between negative self and family-other affect and delinquency among 135 Mexican families of varying social class. The results indicated that: (a) both processed and released delinquent youths and their parents evaluated themselves more negatively than nondelinquent youths and their parents; (b) appraisals in the families of processed and released delinquents did not differ appreciably; (c) migrant families tended to manifest the most negativity and lower-class families the least, with middle-class families in between; and (d) socioeconomic status did not predict the relationship between family hostility and delinquency. The results are seen as providing more support for the family control theory of delinquency than for processing-labeling theory.