关于同一人不同书写速度笔迹变化规律的研究

在笔迹鉴定中,经常会遇到由于检材与样本的书写速度不同,造成二者间的可比性差,给检验和鉴定带来较大的困难。因此,对同一人用不同书写速度造成笔迹变化的规律进行全面、系统的研究,很有必要。文章通过对不同性别、不同年龄、不同职业、不同文化的人群书写速度变化笔迹特征存在的稳定性和可变性进行了统计分析,总结出了同一人速度变化笔迹的规律。研究结果表明,同一人不同书写速度变化的笔迹既具有不变的稳定性特征,也具有可变性特征。     

Rapid and simple GC-MS method for determination of psychotropic phenylalkylamine derivatives in nails using micro-pulverized extraction

A rapid and simple gas chromatography-mass spectrometry (GC-MS) method was developed and validated for the simultaneous detection and quantification of five psychotropic phenylalkylamines (amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine, 3,4-methylenedioxymethamphetamine, and norketamine) in toenails. After external decontamination, nail clippings were mechanically pulverized with a bead mill and then incubated in methanol under ultrasonication at 50°C for 1 h. The resulting solutions were evaporated to dryness, derivatized, and analyzed by GC-MS. The intra- and inter-day precisions were within 10.7% and 13.9%, respectively. The intra- and inter-day accuracies were -4.2% to 5.0% and -2.4% to 8.4%, respectively. Limits of detection and quantification for each analyte were lower than 0.024 and 0.08 ng/mg, respectively. The recoveries were in the range of 80.6-87.5%. The results indicated that the proposed method is a simple, rapid, accurate, and precise for quantification of five phenylalkylamines in nails. The method was successfully applied to the simultaneous detection and quantification of phenylalkylamines in nail samples of possible drug abusers.     

Speeding While Black? Assessing the Generalizability of Lange et al.’s (2001, 2005) New Jersey Turnpike Speeding Survey Findings

Across three months during 2001, Lange, Blackman, Johnson and Voas collected data from the New Jersey Turnpike to determine whether there were differences in speeding behavior grounded in race and ethnicity, while controlling for age and gender. They reported that Black drivers were more likely to speed at high rates (15 mph or more over the speed limit) in 65 mph speed zones, as were young drivers and male drivers. In the scholarly report of their research, Lange and colleagues concluded: “our research offer[s] a plausible explanation for the findings that Black drivers are represented among traffic stops at a higher rate than they are represented in the population.” The present research assesses the generalizability of the findings reported by Lange and colleagues using data reported by Massachusetts State Police officers during April and May of 2001. We also find that Black drivers, young drivers, and male drivers are more likely to speed at high rates in 65 mph speed zones. We therefore remind scholars that Lange and colleagues’ findings and our own are entirely consistent with theory and research on the correlates of law violative actions. Our fundamental conclusion, however, is that more research is needed to determine whether traffic stops for Driving While Black are in small part the result of Speeding While Black.     

谈车辆行驶速度规定

车辆驾驶人总是希望用尽可能短的时间完成两地间的交通过程。有效控制车辆行驶速度,保证车辆行驶速度始终处于安全范围,对于预防和减少道路交通事故的发生、车辆超速行驶等具有重要意义。文章明确了车辆速度的定义与分类,对我国现行道路交通安全法律法规规定的车辆行驶速度进行了详细归纳和整理,并提出了有效控制车辆行驶速度的原则和方法,为车辆驾驶人的安全行车提供了帮助。     

ABS制动痕迹特征及其在交通事故鉴定中的应用

ABS制动痕迹因其独有的作用原理,与普通的制动痕迹相比有自己的特点。在交通事故鉴定中,ABS制动痕迹很容易被忽略。为了提高对ABS制动痕迹的认识,增加ABS制动痕迹在交通事故鉴定中的应用,文章从工作原理、制动痕迹特征及其在事故鉴定中的应用等几个方面进行了探讨,希望能给实际公安工作带来帮助。     

论区间测速的法律完善

传统监测地点车速的执法方式容易被机动车驾驶人躲避,并且覆盖范围有限,因而在制止超速行驶方面效果有限。区间测速以道路的某一段区间为测速的对象,有效地克服了定点测速的弊端。区间测速的实施应在＂以人为本,具有一定容错率＂的原则指导下,注意分段进行测速,认定违法时应以区间平均速度而不能以区间平均行驶时间为依据,同时应完善相应的执法程序,保障相对人的知情权,违反法定执法程序尤其是违反处理时限的执法无效。     

论警察公共关系意识的培育——以郴州交警限速罚款败诉案为例

本文以郴州交警限速罚款败诉案为例，分析、反思了该案中警察公共关系意识缺失的教训，探讨了警察公共关系意识培育的科学途径——理论指导、全员培训、专门推行和文化建设。     

水泥地面上滴落状血迹形态的模拟实验

目的观察水泥地面上不同高度、速度对滴落状血迹的形态和大小,应用于现场勘验。方法采用等量抗凝人血,在静态和动态条件下,进行滴落状血迹的模拟实验,观察血迹的形态,测量其直径,用专业统计软件进行分析。结果在静态条件下,滴落状血迹呈圆形,其周围有毛刺状突起;滴落状血迹的大小(直径)与滴落高度之间有较好的线性关系,可得出回归方程。在慢走、急走、跑、快跑动态条件下,滴落状血迹为圆形或椭圆形,沿运动方向的一侧出现突起;高度、速度分别对血迹形态有影响,而且两者有交互作用。结论滴落状血迹形态和大小的观察和测量,可用推断出血部位的高度、运动速度和方向。     

浅谈散手运动的速度训练

散手运动作为警察体育的必修科目 ,训练手段和方法日趋完善和科学化。快速的反应、灵巧的动作、飘逸的步伐 ,是散手速度训练的目标。高水平的速度训练 ,为散手运动水平的提高奠定了坚实基础。     

9种介质上滴落状血迹的模拟实验研究和应用

目的观察不同高度和速度滴落在9种介质上的血迹的形态、大小及与高度,速度之间的关系。方法采用抗凝人血,在静态和动态条件下,进行滴落状血迹的模拟实验,观察血迹的形态,测量其直径,用spss12.0统计软件进行分析。结果在静态条件下,滴落血迹,多呈圆形,其周围有毛刺状突起;7种介质上滴落血迹的大小(直径)与滴落高度之间有较好的线性关系,可得出回归方程。在慢走、急走、跑、快跑动态条件下,滴落血迹为圆形或椭圆形,沿运动方向的一侧出现突起;高度、速度分别对血迹形态有影响,在水泥路面上两者有交互作用。结论滴落状血迹形态和大小,可用于对出血部位的高度、运动速度和方向的推断。