Bacterial Profiling of Soil For Forensic Investigations: Consideration of Ex Situ Changes in Questioned and Known Soil Samples

Soil, being diverse and ubiquitous, can potentially link a suspect or victim to a crime scene. Recently scientists have examined the microbial makeup of soil for determining its origin, and differentiating soil samples is well-established. However, when soil is transferred to evidence its microbial makeup may change over time, leading to false exclusions. In this research, “known” soils from diverse habitats were stored under controlled conditions, while evidence soils were aged on mock evidence. Limited quantities of soil were also assayed. Bacterial profiles were produced using next-generation sequencing of the 16S rRNA gene. Overall, known soils stored open at room temperature were more similar to evidence soils over time than were known soils stored bagged and/or frozen. Evidence soils, even as little as 1 mg, associated with the correct habitat 99% of the time, accentuating the importance of considering ex situ microbial changes in soil for its successful use as forensic evidence.     

从农民流动分化看发展农民工党员工作

改革开放以来,农村社会成员急剧分化并实现了多元性的流动,形成了“农民工阶层”。在农民工中发展党员对于巩固党的执政地位具有重要意义。当前,在发展农民工入党问题上存在一些不足之处,如：农民工入党问题尚未得到高度重视,农民工入党受入党意愿和条件双重限制等。因此,应在发展农民工入党工作中做到以下几点：坚持属地原则;架设党组织与农民工情感的桥梁和纽带;坚持标准,保证质量;健全具体制度。     

短时交通流预测模型综述

交通流预测在智能交通系统中一直是一个热闹的研究领域，几十年来，专家和学者们用各种方法建立了许多相对而言精确的预测模型。本文在提出来交通流短期预测模型应具备的特性的基础上，讨论了几类主要模型的结果和精确度，并对交通流预测领域今后的发展趋势作出展望。     

李业甫筋骨并举整脊法治疗颈性眩晕临床疗效观察

目的 观察李业甫筋骨并举整脊法治疗颈性眩晕的临床疗效.方法 将80例颈性眩晕患者按照随机数字表法分为对照组和观察组,每组40例.对照组患者采用常规推拿治疗,观察组患者采用常规推拿结合李业甫筋骨并举整脊法治疗.比较两组患者临床疗效,治疗前后颈性眩晕症状与功能评分、眩晕残障程度评定量表(dizziness handicap inventory,DHI)评分及椎-基底动脉血流速度.结果 两组患者临床疗效比较,差异有统计学意义(P<0.05),观察组的治疗效果优于对照组.两组治疗后颈性眩晕症状与功能评分均显著升高,DHI评分均显著降低(P<0.05),且观察组改善程度显著优于对照组(P<0.05).两组治疗后左侧椎动脉、右侧椎动脉、基底动脉平均血流速度均有所增加(P<0.05),且观察组改善程度优于对照组(P<0.05).结论 李业甫筋骨并举整脊法可以有效调节椎-基底动脉血流速度以减轻患者的眩晕症状.     

Notes on recent dissertations

The growing popularity and use of news Web sites around the world provides new possibilities for studying the position of the United States in the world system charted by digital news items. In this article, we look at 35 popular news sites in 10 different languages over a 2-year period, in order to assess the position of the United States in world news as well as to identify possible explanations for it. Our findings show that the United States is by far the most prominent country in the news sites that we studied from around the world, except for the French and Arabic ones. The network structure of news links clearly exhibits its key position as the centerpiece of a global system. Economic factors better explain America's news prominence than political, social, and geographical factors. Yet, none of the many variables we examined could explain the large gap between the news prominence of the United States and that of the rest of the world. We discuss possible reasons for these findings and suggest directions for further studies in the field.

[Supplementary material is available for this article. Go to the publisher's online edition of Political Communication for the following free supplemental resource: network data.]     

20世纪中叶新马华人社会与华南互动之探讨

本文着重探讨新马华人社会的社会群体及经济组织在新马及华南的互动中所扮演的角色及依赖的基础,希望弥补以往研究新马华人社会与华南侨乡互动时只注重实际交往的不足,而进一步探讨这一实际交往的基础即无形的信息流动。另一方面,跨国社会联系又是建立在国家的基础上,因此希望能在探讨跨国社会网络的同时也回到国家层面,进一步揭示国家在网络发展中所起的作用。     

离散时间动态网络模型及其在疏散过程中应用的研究

本文对离散时间动态网络模型在社区疏散问题中的应用进行了研究。时间是模型中都的主要参数,其中在社区各组成部分中行走的时间只是总疏散时间的一部分。模型中把疏散时间划分为时间周期,反映了疏散者的运动随时间变化的情况。在不考虑紧急情况下人任何的个体行为的情况下产生一个疏散时间的下限(即最小疏散时间)。这一数值可用来对现存社区的疏散能力进行分析或评估。     

公安院校刑事科学技术专业实践教学流程设计

刑事科学技术专业是公安院校的主干专业之一，公安院校毕业生作为地方实战部门技术人员的主要来源，其素质的高低主要取决于在学校所接受教育达到的学习效果及所形成的能力水平。文章针对实践教学过程中存在的主要问题，借鉴学习——实践——再学习——再实践……的开放式的教育理念，本着理论联系实际、教学延续性、层次递进性、学生主体性及普遍可行性原则，设计了由校内实践和校外实践两大模块构成的公安院校刑事科学技术专业实践教学流程，力求更有效地提高公安教育质量，实现培养应用型与实用型人才的教学目标。     

解读操纵和粉饰现金流量表的陷阱

比起资产负债表、利润表,现金流量表更能全面地反映企业产生现金流量的能力并揭示现金流向所描述的本质。但是,现金流量表也是可以粉饰、操控的,现金流量表的强盗式造假、欺骗性操纵和技巧性包装等是操纵和粉饰的主要表现形式。     

试析高校青年人才隐性流动的群体冲突及其控制

随着市场经济的发展,高校中越来越多的青年教师和科研人员参与了本职工作以外的兼职工作,以满足自身物质需求和精神需求,这一问题的日益突出,成为高校管理工作的一大难题。本文就高校青年人才隐性流动带来的群体冲突及其成因进行分析,阐述了人才流动中产生的资源流动,分析这一流动的利与弊,提倡以“宜疏不宜堵”的态度和原则对之进行科学管理。