Covert communication by means of email spam: A challenge for digital investigation

In digital investigations the investigator typically has to deal with thousands of digital artifacts. Among them, email has long been one of the many focuses that potentially can generate useful information. However, in our training we notice a tendency to overlook or downplay the importance of analyzing spam emails as they are generally assumed to be irrelevant junk emails. In this article we thus illustrate how these seemingly irrelevant messages might play a crucial role in digital investigations. Five scenarios are introduced in which the investigator tends to overlook crucial incriminating information that has been disguised as spam. The methods used by criminals in these cases are discussed. In light of these covert criminal communications, we call for more attention from the digital forensics community to realize how email spam may assist in criminal activities.     

硫磺乳膏和硫软膏含量测定方法的探讨

目的：改进硫磺乳膏和硫软膏含量测定的方法。方法：采用回流后直接容量分析方法分。析制剂中的硫含量。结果：改进后的方法明显优于原始的方法，可用于这两种制剂的含量测定。     

复方守宫散中铅、镉、铜含量分析

目的：测定抗肿瘤药物复方守宫散中微量金属元素铅（Pb）、镉（Cd）、铜（Cu）的含量.方法：采用湿法消化,火焰原子吸收分光光度法测定.结果：复方守宫散中含金属元素Pb、Cd、Cu,含量高低依次为：Pb〉Cu〉Cd.结论：复方守宫散每日服用量中Pb、Cd、Cu含量均远低于人体正常摄入量,属安全用药范围.     

坚持从公安工作实际出发以素质教育为目标深化公安教学改革

当前,必须坚持从公安工作实际出发,以素质教育为目标,深化公安教学改革。具体做法是以加强实践教育为突破口,促进教育全面改革;以德育为素质教育的核心,改革教学内容和方法;优化教学手段。 公安教学改革;;素质教育;;公安工作实际;;教学内容;;教学方法;;教学手段;;德育     

合肥市大蜀山几种药用植物体内铅的含量分析

目的:以安徽省合肥市郊大蜀山几种常见的药用植物为例,分析铅(Pb)在药用植物不同部位的分布,初步探索Pb在药用植物体内分布的规律。方法:采用湿法消化、原子吸收分光光度法测定Pb元素的含量。结果:植物体内Pb的含量与植物种类和生长环境有关。本实验为从源头控制中药材和中成药重金属超标提供科学依据。     

从利用BBS犯罪分析网络内容服务商的不作为刑事责任

网络服务商包括网络连接服务商和网络内容服务商。网络连接服务商由于各种原因不能成为互联网中不作为犯罪的主体。从不作为犯罪的构成原理来看,网络内容服务商如BBS及其相关工作人员完全符合不作为犯罪的构成条件,并且其罪过形式只能是故意犯罪。然而,我国现行刑法却对这一犯罪主体及相关罪名没有明确规定,无疑会放纵此类危害甚大的犯罪。     

课内外一体化教学促进健美操课程改革的试验研究

对河北工业大学07、08级健美操试验班的学生进行调查,结果表明,学生对健美操专项课的需求是多层次和多样化的,对简单易学、场地器械要求不高的形体姿态操和大众健美操非常喜爱;同时对较时尚、充满活力的街舞和拉丁健美操、竞技健美操大部分学生渴望学习。针对我校健美操专项课的现状,认为在教学内容上还需适当调整,加大对健美操课外俱乐部的支持力度,进一步满足学生的求知欲。     

Ideological proximity and valence competition. Negative campaigning through allegation of corruption in the Italian legislative arena from 1946 to 1994

We consider the possibility for the parties to invest in negative campaigning – a behavior that, in our framework, involves blaming alleged insufficiencies of the rival concerning commonly shared values. Within a simple one-dimensional model, we deduce the hypothesis that the parties’ incentive to “attack” each other increases with the parties’ proximity on the left–right space. We test our hypothesis on an Italian case, focusing on the emphasis placed by the Communist Party on political corruption issues during the government investiture debates that spanned from the postwar period until 1994, when the traditional party system abruptly collapsed. The statistical results are largely consistent with our theoretical insights.     

Analysing Parliamentary Debate with Computer Assistance

The analysis of parliamentary debates is at the confluence of a number of developments in political science. What light can automated and semi‐automated techniques throw on such analysis? In this paper we compare two such approaches, one semi‐automated (Hamlet) and the other fully automated (Alceste). We use both approaches to identify the prominent themes in debate and to assess how far speakers who favour different positions adopt a distinct pattern of discourse. We seek to assess how far the two approaches yield convergent or divergent analyses. Selecting a second reading debate from the UK House of Commons on a private member's bill on abortion in July 1966, we are able to show similarities of analysis despite the detailed differences between the two approaches. In particular, the analysis in Hamlet al.lows identification of the extent to which individual speakers employ one type of vocabulary rather than another. Alceste is able to provide a statistical basis for the different classes of vocabulary that occur in the debate. However, the two programs rest upon quite different assumptions about the relationship between syntax and meaning, with implications for the practice of political science.     

双波长薄层扫描法测定尿塞通片中盐酸小檗碱的含量

目的：研究尿塞通片中盐酸小檗碱的含量测定方法。方法：采用双波长薄层扫描法，以正丁醇—冰醋酸—水(7：1：2)为展开剂，测定波长为425nm。结果：尿塞通片中其他成分对盐酸小檗碱的测定无干扰，线性范围为0．0636—0．3180μg，平均回收率为96．97％，RSD为1．71％。结论：该方法操作简便、准确，可用于尿塞通片的质量监控。