Feasibility of Canine Detection of Mass Storage Devices: A Study of Volatile Organic Compounds Emanating from Electronic Devices Using Solid Phase Microextraction

Detection of canines are well‐known to be valuable in the location of contraband, such as explosives or narcotics. More recently, canines have been trained and utilized in the detection of concealed mass storage devices that might contain evidence of illegal activity such as child pornography. To lay the analytical foundation for this detection work, research was carried out to determine the volatile organic compounds associated with mass storage devices (MSD) that could be used by trained canines for detection. Headspace analysis of a variety of electronic devices was performed using solid phase microextraction (SPME) with gas chromatography/mass spectrometry (GC/MS). Analyses found several volatile compounds common to SIM and SD cards, as well as USB drives, including 2‐propenenitrile, styrene, isophorone, hydroxycyclohexyl phenyl ketone, and 2‐furanmethanol, tetrahydro. Results indicated that mass storage devices do have a characteristic odor profile making detection with minimal false alerts feasible for trained canines.     

云计算在高校信息资源建设中的应用

云计算是以互联网为中心,提供快速、便捷的数据存储和网络计算服务。它对高校信息资源建设必然也会产生重要影响。本文首先介绍云计算的概念、工作模式和本质,然后分析中国高校信息资源建设中存在的问题,最后探讨云计算的应用对高校信息资源建设产生的影响。     

Violence,Guns, and Suicide in New Orleans: Results from a Qualitative Study of Recent Suicide Decedents

Many Americans own guns to protect themselves against other people, but there is evidence that both victimization and gun access increase suicide risk. We conducted qualitative interviews with informants of 17 suicide cases in New Orleans of the 60 who died between January 2015 and April 2016 to understand the relationship between past trauma, gun access and storage, and suicide. Nine cases had experienced a past trauma, including three who had recently had a family member killed by homicide. Eight died via firearm; of those, seven owned the guns they used to take their lives and stored them locked (but loaded) at home or in their cars. Preventing community violence and addressing its sequelae may be important for reducing suicides. A multi‐pronged strategy consisting of policies, education, and marketing will likely be needed to address the risk of suicide conferred by gun access.     

云存储侦查策略研究

云计算,作为近年来发展迅速的信息技术手段,给社会各机构、普通群众的生活提供了很大的便利。云存储作为云计算的一个延伸技术,越来越多的融入到人们的生活中。在这一新形势下,犯罪分子也越来越多的使用该技术规避侦查人员的侦查取证活动。有鉴于云存储技术的新颖性与复杂性,有必要针对性地分析研究新的侦查取证策略,以应对新挑战。     

Risky Firearms Behavior in Low-Income Families of Elementary School Children: The Impact of Poverty, Fear of Crime, and Crime Victimization on Keeping and Storing Firearms

This report examines possession and storage of firearms in low-income urban families with at least one child between 8 and 12 years of age. The data primarily consisted of responses to a survey administered to parents, but these data were supplemented by records obtained from discussion groups composed of children between 8 and 12 years of age. The data were collected from five low-income neighborhoods in a medium sized city in the Pacific Northwest as part of a larger study focusing on the presence of risk factors for substance abuse, violence, and gang activity. All five neighborhoods are known to be plagued by poverty, violence, substance abuse, and gang activity. To make our findings more understandable, we compared our findings from these neighborhoods to similar data from a middle-class neighborhood. Middle-class parents were twice as likely to have firearms in their homes, but were much less likely to keep them loaded and/or unlocked. High rates of victimization, fear of crime, self-protective behavior, and exposure to threats or attacks were associated with keeping firearms for protection and engaging in risky gun behavior in the home.     

Electronic signatures and security issues: An empirical study

Security concerns with regard to the use of electronic signatures in the electronic environment seem to represent a potential barrier to their usage. This paper presents an empirical study that examines businesses' perceived security concerns with the use of the electronic signature technology for executing contracts and commercial transactions and whether such issues represent a disincentive for their usage. The findings of the study reveal that there are significant security concerns in the business community with regard to the use of electronic signatures. However, such perceptions seem to be primarily driven by a lack of awareness and understanding. Advising prospective users of electronic signatures about the kind of safeguards that could be put in place to minimise risks associated with their usage can be a useful step towards overcoming their fears and hesitance.     

燃气加气站地下储罐的置换和试压方法的探讨

介绍了汽车用燃气加气站地下储罐的置换和试压方法 ,对地下储罐系统试压方法的经济性进行了分析     

“云计算”的法律问题及其对策

云计算本质是新型的信息服务模式,它既改变了用户设备、软件的支配关系,也使用户对数据丧失了直接的掌控能力。因此,云服务引发了许多新的法律问题,如信息安全、数据权利、知识产权、司法管辖。云服务问题仍然植根于信息通信技术应用产生的问题,我们必须从技术、标准、法律、商业等多角度,解决云计算机的安全和相关问题,以消除我国信息技术的应用方面的法律障碍。     

蛋鸡输卵管中与精子储存相关四种酶分布的组织化学染色观察

应用组织化学方法在组织和细胞水平上对碱性磷酸酶、酸性磷酸酶、过氧化氢酶以及三磷酸腺苷酶在蛋鸡输卵管内的分布特点及分布意义进行了研究分析。结果显示,4种酶在蛋鸡输卵管各段的分布部位以及反应强弱存在差异。碱性磷酸酶在子宫部分布最多,在有精子储存的黏膜固有层腺体和血管周围也有明显分布;酸性磷酸酶在阴道子宫交界部分布最多,酸性磷酸酶阳性反应呈颗粒状,主要分布于黏膜上皮和固有层腺体;过氧化氢酶在输卵管各段血管周围以及子宫阴道交界处精子腺和蛋白分泌部反应明显;三磷酸腺苷酶在各段尤其是子宫阴道交界处精子腺部位黏膜上皮纤毛和腺体分布较多,血管也有一定分布。表明这些酶在精子储存时对精子的活性和储存环境的维持、物质运输及分泌等活动具有一定的生物学作用。     

西部资源分类和资源战略选择

本文从西部地区资源结构的特征出发 ,将资源分为两大类 :存量资源和流量资源 ,并对存量资源与流量资源的优劣势进行了比较分析 ,指出了存量优势与流量优势的不同效率 ,并在客观分析资源开发中的现实问题的基础上 ,提出了西部地区资源优势转化的战略新思路。