Wind-drag estimation in a traffic accident involving a motor scooter and a tractor-trailer

This case report describes a noncontact traffic accident involving a motor scooter and a tractor-trailer with a focus on the wind-drag effect. We used load cells to measure the drag force acting on a substantially similar motor scooter when a substantially similar tractor-trailer passes by it, taking into consideration various speeds of the tractor-trailer and distances between the two vehicles. A three-dimensional steady-state flow analysis was also performed by using the CFX program for computational fluid dynamics to examine the streamlines and the pressure distribution around the tractor-trailer at various speeds. From the experiment, for a separation distance of 1.0 m (3.28 ft) and a speed of 90 km/h (55.9 mph), the maximum resultant drag force is 124.5 N (28 lb); this constitutes a degree of force that could abruptly disrupt the stability in maneuvering by an operator who is unaware of the approaching tractor-trailer. In addition, a single equation that relates the tractor-trailer speed to the drag force that acts on the motor scooter was derived on the basis of the Reynolds number (Re) and the wind-drag coefficient (C(d)): C(d) = 1.298 × 10(-7) Re.     

DNA identification of "Earthquake McGoon" 50 years postmortem

This report describes the genetic identification of James "Earthquake McGoon" McGovern, a WWII fighter ace who perished in Laos while providing supplies to French troops during the French Indochina war. Because reference samples were unavailable for all of the potential casualties, testing of the entire mitochondrial genome, autosomal STRs and Y-chromosomal STRs was performed to increase the genetic information available for analysis. Kinship analyses performed on the evidentiary data and numerous indirect family references for McGovern excluded other possible casualties and definitively established McGovern's identity. This particular case demonstrates the practical utility of novel research technologies and aggressive genetic typing protocols in the identification of aged, degraded remains.     

两种计数法预测叔侄关系的对比研究

目的对比等位基因全不同基因座及共有等位基因计数法预测叔侄关系的差异性、相似性及其效能,为侦破案件提供参考。方法以已知叔侄关系的204对作为实验组,无关个体的204对作为对照组,采用PowerPlex 21系统检测20个常染色体STR基因座,然后进行统计分析。结果设定等位基因全不同基因座数预测界值≤6个,发现叔侄关系的灵敏度为83.82%,特异性为74.02%,漏判率为8.82%,误判率为11.76%,系统效能为78.92%。共有等位基因数预测界值≥17个,发现叔侄关系的灵敏度为75.98%,特异性为77.45%,漏判率与误判率均为7.84%,系统效能为76.72%。结论等位基因全不同基因座计数法与共有等位基因数计数法有互补优势,联合应用能提高预测叔侄血亲关系的能力,对侦查具有良好的指导意义。     

气体涡轮流量计标定精度的分析

分析影响气体涡轮流量计标定精度的各种因素 ,并提出了解决的方法     

关于持有、使用假币罪的认定

随着社会经济的不断发展,有关货币方面的犯罪越来越多,持有、使用假币的犯罪也时有发生。在司法实践中,在认定持有、使用假币罪的时候,存在许多容易使人们混淆的认识。文章主要探讨了在认定此罪时应注意的持有、使用假币罪与其他犯罪的界限以及罪数形态问题。     

更改机动车辆号码的常见方法及检验

更改机动车辆车架号码和发动机号码是犯罪分子的惯用伎俩,常用方法有割改法、填改法、添减笔画法、添减阿拉伯数字法和移位法等。发现车辆号码更改的方法有观察车辆驾驶室内仪表盘,观察车辆发动机号码平台,以及牢记各类型车辆的发动机号码和车辆车架号码的字体特征、打印部位、打印方式、倾斜角度等特征,并进行比对。显现变动的车辆号码的方法一般用化学试剂显现。     

若干联图的邻点可区别关联染色

图G的邻点可区别关联染色是指G的任意相邻顶点具有不同色集的关联染色。研究了联图GVCM,GV氏和GVSM的邻点可区别关联染色,得到了相应的邻点可区别关联色数,其中G是n＋l阶的星,轮或扇;cM为m阶圈,SM为m＋1阶星,TM为m阶树。     

滥用职权罪疑难问题研究

滥用职权罪的危害结果是对国家公务正当性的侵害,而＂致使公共财产、国家和人民利益遭受重大损失＂是犯罪客体遭受侵害后的＂进一步结果＂,将其解释为客观的超过要素是妥当的。国家机关工作人员收受贿赂,有滥用职权的行为,同时又构成受贿罪的,应当实行数罪并罚。     

刑法第13条但书的适用范围

刑法第13条但书的适用范围应该是有所限制的,根据行为性质及刑事立法对具体犯罪的规定方式,但书的适用可以区分为三种不同的情况:对于以情节进行定量限制的犯罪,绝对不能适用但书;对于危害国家安全的犯罪、性质严重而分则务文中没有定量限制的犯罪以及性质较轻但分则条文中附加定量限制的犯罪,一般不能适用但书;对于性质较轻而分则条文中又没有定量限制的犯罪,则可以适用但书.尽管但书的适用范围有限,但并不能因此而否定其价值并主张将其予以废除.     

网络账号的法律属性及保护探析简

网络账号包含账号本身和需要使用账号的密码.网络账号具有延伸性、虚拟性和相对独立性.网络账号因其本身的特殊性和账号下的虚拟财产而具有一定的财产属性.同时,网络账号又具有物的属性,相较于其他用户而言具有排他性.网络账号的法律保护既表现为物权法等实体法律保护方面,也表现为管辖确定等程序法律保护方面.