Forensic Application of Analytical Mechanics in Fatal Fall From a Height

Fatal fall from a height initiated with a swinging motion on the sagittal plane of the victim's body is examined. Method of analytical mechanics is adopted to establish the functional relations between the swinging angle of the body and the force needed to sustain the body until release, and the amount of the horizontal displacement that would occur after release. The analysis is applied to support an expert opinion presented in a criminal court in which two accused were convicted of murder for dropping a female victim from a bridge. The results indicate that it is unlikely for the body to locate as recorded by the police investigation report in the case. This study demonstrates that a straightforward mechanical analysis can be utilized to examine uncommon falling scenarios.     

A Test of Generalizability of the Social Development Model Across Gender and Income Groups with Longitudinal Data from the Elementary School Developmental Period

The social development model (SDM) is a theory of behavior that has proven useful in explaining the etiology of delinquency, violence, and substance use among adolescents as well as early antisocial behavior among pre-adolescents. A further test of the model is its generalizability across population groups. A section of the SDM representing prosocial influences in the etiology of problem behavior was compared for boys and girls and for children from low- and non low-income families using three waves of child, parent and teacher survey data on a sample of 851 elementary school students. Multiple group structural equation modeling was used to assess differences across groups in both measurement of model constructs and hypothesized structural paths between constructs. The results indicate overall similarity in the reliability of measurement models and validity of structural models.     

经济分析理论对涉税犯罪案件侦查之导引

经济理论中的数理分析理论运用到对涉税犯罪案件的侦查中来,可用成本公式“收入-成本= 利润”对涉税犯罪案件的作案手法、证据搜集和线索作分析、确认,从而为经济犯罪侦查人员提供一种新的侦查方法,为涉税犯罪案件侦查创造一种新的思路。     

第一次数学危机及其哲学分析

毕达哥拉斯关于数的信条及以数为基础的宇宙模型的破产,导致了第一次数学危机。这一危机的影响是巨大的,它不仅推动了数学及其相关学科的发展,使古希腊数学的基础发生了根本性的变化,而且推动了整个科学的发展。在古希腊,数学和哲学是结盟的,哲学使古希腊的数学趋于抽象和真理。正是由于古希腊的哲学背景,使其有可能建立世界上第一个数学公理系统,并最终导致了近代科学的诞生。     

刑侦画像造型训练方法的研究

刑侦画像是依据目击者的记忆语言描述,利用素描等手法模拟刻画犯罪嫌疑人相貌特征的技术手段。刑侦画像造型训练方法的研究,为刑侦画像技术的教育实践工作探索科学有效的培养训练方法,以适应我国公安刑侦工作的实际需要。     

Living in the Past or Living in the Future? Analyzing Parties’ Platform Change In Between Elections,The Netherlands 1997–2014

Do parties change their platform in anticipation of electoral losses? Or do parties respond to experienced losses at the previous election? These questions relate to two mechanisms to align public opinion with party platforms: (1) rational anticipation, and (2) electoral performance. While extant work empirically tested, and found support for, the latter mechanism, the effect of rational anticipation has not been put to an empirical test yet. We contribute to the literature on party platform change by theorizing and assessing how party performance motivates parties to change their platform in-between elections. We built a new and unique dataset of >20,000 press releases issued by 15 Dutch national political parties that were in parliament between 1997 and 2014. Utilizing automated text analysis (topic modeling) to measure parties’ platform change, we show that electoral defeat motivates party platform change in-between elections. In line with existing findings, we demonstrate that parties are backward-looking.     

Effect of Wind on Horizontal Displacement of Fatal Fall from a Height

The horizontal displacement of the human body resulting from fatal fall from a height is an important variable commonly used to inversely determine the cause or identify other forensic aspects of the fall. When examining the horizontal displacement, the wind effect is generally ignored. This technical note reports analytical modeling of the falling process, utilizing previous measurements of wind force acting on the human body, for determining the functional relationship between the wind speed and the horizontal displacement in the falling process. The result reveals that it does not take extremely rare wind conditions to cause a considerable shift of the human body, highlighting the importance to consider wind as a factor in investigations of fatal falls.     

信息化城市管理和谐模式评价体系

就“信息化城市管理模型”中的关键组成部分———评价体系,进行建模。“信息化城市管理模型”的评价体系将以“效能”贯穿其中,一切因素归结于“效能”。     

Intergenerational Transmission of Dating Aggression as a Function of Witnessing Only Same Sex Parents vs. Opposite Sex Parents vs. Both Parents as Perpetrators of Domestic Violence

The present study examined the association between witnessing interparental violence as a child, and the risk for perpetrating and being the victim of dating aggression as an adult, in an undergraduate sample. Specifically, this study tested a modeling hypothesis whereby witnessing a same sex parent vs. an opposite sex parent exclusively in the aggressor role would be more highly associated with risk for perpetrating dating aggression. Similarly, observing a same sex parent vs. an opposite sex parent as exclusively a victim of marital aggression would be associated with risk for being a victim of dating aggression. A same sex modeling effect was found for perpetration of dating aggression. Respondents who witnessed only their same sex parent perpetrate physical marital aggression were at increased risk for perpetrating physical dating aggression, whereas respondents who witnessed only their opposite sex parent perpetrate were not. A same sex modeling effect, however, was not found for being a victim of dating aggression. Rather, risk for victimization by dating aggression was associated only with witnessing bidirectional marital violence. Implications of these results, limitations of the present study, and ideas for future research are discussed.     

数学方法与政工研究

运用数学方法是社会科学研究的一种现实趋势。数学方法对政工研究的渗透和影响主要有三个领域：一是政治工作测评；二是思想信息分析；三是政治工作方案决策与预测。由于政工教研人员缺乏数学知识，政工科学本身的不成熟，政工研究的数学化程度还不够高。相信随着知识军事的到来，数学方法的运用必将促进政工研究的科学化