An investigation into the accuracy of follow-on GPRS/mobile data CDRs

This study investigated the accuracy of 3G and 4G follow-on GPRS (General Packet Radio Service)/mobile data CDRs (Call Detail Records) from three UK mobile network operators (EE, Vodafone and Three). Follow-on GPRS/mobile data CDRs are currently considered to be more open to misinterpretation than voice/SMS CDRs as uncertainties exist regarding the correspondence between the timestamp and the Cell ID presented within the CDRs. Consequently, follow-on GPRS/mobile CDRs may be disregarded during criminal investigations, potentially losing valuable intelligence and evidence. To assess the accuracy of follow-on GPRS/mobile data CDRs, connected mode RF (Radio Frequency) surveys were conducted while simultaneously producing follow-on GPRS/mobile data CDRs in a travelling vehicle. This allowed a comparison of the start Cell ID presented in the CDR and the Cell ID that provided coverage to the device at the start time of the CDR to assess the correspondence between the timestamp and the Cell ID presented within the CDRs, and to consider the validity of the terminology used by experts. It was found that individual follow-on GPRS/mobile data CDRs cannot consistently place a device within the coverage area of the start Cell ID at the start time of the CDR. Instead, the results indicate that a terminology which places the device within the coverage area of the start Cell ID ‘at or before’ the start time of the CDR is appropriate. It is crucial that follow-on GPRS/mobile data CDRs are analysed with this consideration in mind so to interpret the evidence correctly.     

脑络欣通对脑缺血再灌注模型鼠神经细胞凋亡及P53蛋白表达的影响

目的: 研究脑络欣通对脑缺血再灌注模型鼠神经细胞凋亡及P53蛋白表达的影响.方法:采用饥饿、劳累、高脂饮食等多因素复制大鼠气虚血瘀证模型,然后用线栓法阻断大鼠左侧大脑中动脉2 h,复制局灶性脑缺血再灌注模型,于再灌注1,3 d,用TUNEL法和免疫组化法分别检测脑缺血半暗带凋亡细胞和P53蛋白表达.结果:与模型组比较,脑络欣通组脑缺血半暗带的凋亡细胞和P53蛋白表达显著减少(P＜0.05).结论:抑制P53蛋白的表达是脑络欣通抗脑缺血再灌注后神经细胞凋亡的机制之一.     

移动设备电子搜查的制度挑战与程序规制——以英美法为比较对象

评估执法的正当需求和手机用户的合法权益成为移动互联网时代的程序规制命题。移动设备搜查对警察权力的重要性和公民权利保护的重要性日益凸显,应当将移动设备视为人们具有合理信赖的一个信息隐私空间。英国、美国的手机搜查规范上的域内不统一导致搜查实践的多样态、公民权利的保护缺陷。但其应对证据的移动电子化的基本思路——根据信息种类或其他变量进行立法,区别对待搜查条件——对中国相关搜查问题的解释和解决具有镜鉴意义。我国需要考虑确立获得搜查批准的原则,通过类型化规则给执法提供明确指导,并且明确搜查后的系列权利保障,进行电子搜查规则的适时调整与动态平衡。     

细胞式生产方式在日本的新发展

细胞式生产方式在日本经历了20世纪90年代的"普及推广阶段"之后,现在步入了"改进创新阶段"。细胞生产方式与流水线生产方式比较具有种种优势,但这种优势不会在应用中自然而然地发挥出来,企业必须依据自身要达到的具体目标,加以创造性地运用,在创造性运用的过程中使其不断完善、发展和提高。日本在推广细胞式生产方式方面的经验值得我国学习和借鉴。     

手机通话语音的实验研究

当前,手机通话语音已成为司法语音鉴定中最为常见的一种语音形式。本研究从手机通信系统的信道特点出发,分析手机通话语音的声谱特点和共振峰频率变化等情况;同时还比较了不同通话网络、不同通话方式及不同手机的通话语音特点。实验发现,手机通话语音与直接录音语音有明显的变化,主要表现在高低频信息的带宽滤波效应、高低频共振峰的漂移、语音质量、音色、韵律特征等方面;还发现,不同手机通话条件下的语音变化程度不同。最后,讨论了手机通话语音变化对说话人鉴定的影响及鉴定中的注意事项。     

雄黄对Raji细胞凋亡的影响

目的：了解雄黄体外抗肿瘤的细胞谱。方法：采用MTT法测定细胞的活力，利用流式细胞仪测定细胞周期、Annexin V和bcl-2的表达。结果：雄黄体外对Raji细胞的生长有明显的抑制作用，对细胞周期的影响表现为G2/M期的阻滞，Annexin V阳性的凋亡细胞明显增加，并且可使bcl-2的表达下调。结论：雄黄有诱导Raji细胞凋亡的作用。     

马钱子碱对兔软骨细胞增殖的影响

目的：观察马钱子碱对体外培养兔软骨细胞增殖的影响。方法：分离、培养兔的软件细胞，采用四甲基偶氮唑盐比色法检测细胞增殖。结果：马钱子碱高、中、低剂量组细胞增殖率均高于空白对照组(P＜0．05)，一氧化氮(NO)能抑制软骨细胞的增殖，马钱子碱能拮抗NO对软骨细胞增殖的抑制作用。结论：马钱子碱能有效促进软骨细胞增殖。     

The importance of communicating cause-related marketing (CRM) strategies in South Africa

ABSTRACT

It is the contention of this article that South African companies should use a cause-related marketing (CRM) strategy to advance their business objectives, at the same time communicate their involvement in uplifting and investing in society. Communicating corporate socially responsible activities is important for a number of reasons. It is necessary to create awareness and an understanding of current corporate social responsibility (CSR) policies, strategies and attitudes, to define an integrated strategy for the future. These policies and activities must be communicated internally and externally in order to enhance an organisation's reputation, loyalty and relationship among all stakeholders. This could ultimately lead to potential increases in customer traffic and sales that will positively affect the bottom line and lead to bigger corporate social investments by a company. Besides these advantages, effective cause-related marketing strategies could also secure preferential treatment of investors within a highly competitive business environment.     

手机犯罪新趋势探究及侦查对策——以智能手机、3G手机为主要视角

随着科技的不断发展,手机犯罪也呈现出新的趋势。新型手机犯罪侦查应当着手设立手机犯罪监控系统,加强情报信息收集工作;注意侦查方式的转变,加强对证据的收集与利用;加强侦查协作与人员培训。     

手机短信诈骗案件的特点与技术防范措施探讨

近几年来,手机短信诈骗案件持续多发,犯罪手段不断翻新。给手机用户的财产安全带采了极大的危害。本文在分析归纳手机短信诈骗案件特点的基础上,从严格手机号码申请制度、加强对短信数据传送的监控、严密对银行账户及汇款的监控三个方面对防范手机短信诈骗案件的措施进行了探讨。