Android智能手机的取证

作为一种新兴的智能手机,Android手机发展势头极为迅猛,并越来越多的受到人们的关注。通过对Android智能手机的取证研究,在介绍了Android手机的基本工作原理后,详细描述了取证方式。通过Android SDK工具对手机内外置存储进行镜像备份,逻辑分析利用文件系统分析,查找每个应用程序自带的数据库文件来获得有价值信息,物理分析通过对内存镜像进行数据恢复以寻找删除的文件,两者互相结合。结果表明,能够从Android手机中有效寻找到潜在证据。     

小鼠皮肤切创细胞因子的基因表达变化及其与损伤时间关系

目的 观察细胞因子在小鼠皮肤切创组织不同时间的基因表达变化及其与损伤时间的关系。方法用免疫组织化学染色法和RT-PCR法,检测小鼠皮肤切创组织中不同时间的白细胞介素-1α和-1β(IL-1α、-1βB),以及单核细胞趋化蛋白-1(MCP-1)、吞噬细胞炎性蛋白-1α和-2(MIP-1α、-2)的基因表达变化。结果 皮肤切创后在早期可诱导IL-1α和IL-1β的基因表达,6h达第一次高峰,24h下降,第3d再次出现高峰后,第6d下降至正常水平;而MCP-1、MIP-1α和MIP-2则在损伤后6h左右开始出现,3d达高峰,然后呈下降趋势。在这些被检因子中,以IL-1α、IL-1β、MIP-1α和MIP-2的变化幅度较大,而MCP-1的变化相对较小。结论 切创组织中IL-1α、-1β和MCP-1,以及MIP-1α、-2的基因表达随伤后不同时间呈现一定规律性变化;同时对同一组织多种细胞因子检查推测损伤时间完全可行。     

黄芩素对人白血病K562细胞增殖及凋亡的影响

目的:观察黄芩素对人白血病细胞K562生长的抑制作用及对细胞凋亡率的影响。方法:体外培养K562细胞,将对数生长期K562细胞数调整到1×105/m l,将黄芩素加入各实验孔,将黄芩素的终浓度调整为25.0,50.0,100.0,200.0,400.0μg/m l,每个浓度设4个复孔,分别培养细胞48 h和72 h,采用MTT比色法观察黄芩素对K562细胞的生长抑制作用。将对数生长期K562细胞数调整为1×107/m l,加入黄芩素50.0,100.0,200.0μg/m l作用48 h后,收集细胞用流式细胞仪进行检测,并计算凋亡细胞百分数。结果:黄芩素对人白血病K562细胞增殖有抑制作用,且呈剂量依赖性和时间依赖性。黄芩素50.0,100.0,200.0μg/m l诱导K562细胞凋亡,有明显的凋亡峰(AP峰)出现。结论:黄芩素对人白血病细胞K562的增殖有抑制作用,其机制可能与促进K562细胞的凋亡有关。     

The interplay of (semiotic) technologies and genre: the case of the selfie

ABSTRACT

The selfie is one of the most widely publicized, criticized, and debated visual phenomena of our time. However, formulating a definition of the selfie is not straightforward, as visual clues – be they representational or compositional – alone are not sufficient for identification. Recognizing an image as a selfie, rather than a portrait, often requires viewers to interpret the image in relation to the technological and sociocutural context in which the photo was taken and shared. In this paper, we consider the technological conditions that have shaped the evolution of the selfie as a visual genre. Central to our discussion is the premise that the selfie is not simply a genre for self-representation, but means of generating various perspectives: that of the selfie maker, the represented visual participant, and the viewer identification. This unique perspective-generating affordance of the selfie is both facilitated and constrained by the various technologies involved in selfie practices. On the one hand, the technological and physical constraints of the smart phone camera give rise to a specific form of “distorted” look which makes certain types of selfie possible. On the other hand, social media platforms facilitate the sharing of selfies, which results in increasingly stylized and creative ways in which perspectives of the self can be represented, negotiated, and, in the case of selfies manipulated via apps, augmented.     

女大学生基本心理需求满足与手机成瘾的关系:错失焦虑的中介作用及社会支持的调节作用

为探讨错失焦虑在女大学生基本心理需求满足与手机成瘾之间的中介作用以及社会支持的调节作用,采用基本心理需求满足量表、错失焦虑量表、大学生手机成瘾倾向量表、领悟社会支持量表对956名女大学生进行了调查.调查结果发现:基本心理需求满足与错失焦虑、手机成瘾均呈负相关(r=-0.29,-0.44),基本心理需求满足与朋友支持、家...     

Development and validation of a liquid chromatography-mass spectrometry assay for hair analysis of methylphenidate

Examination of various SIM cards and smart card devices indicates that data may be retained in SIM card memory structures even after heating to temperatures up to 450 degrees C, which the National Institute of Standards and Technology (NIST) has determined to be approximately the maximum average sustained temperature at desk height in a house fire. However, in many cases, and certainly for temperatures greater than 450 degrees C, the SIM card chip has suffered structural or mechanical damage that renders simple probing or rewiring ineffective. Nevertheless, this has not necessarily affected the data, which is stored as charge in floating gates, and alternative methods for directly accessing the stored charge may be applicable.     

手机：超越后现代的现代性

手机的技术功能使创作和书写即时化（instantaneity），它迎合了后现代“去中心化”、“差异”和“不连续性”等要求，但是，手机隐含的技术理性却前所未有地对人控制，使权力运作脱离了物质场域，在日常生活中延展开来。     

'Nuisance' phone calls to women in England and Wales

Obscene or nuisance phone calls are particularly targeted towards women. Employing data from two sweeps of the British Crime Survey a decade apart (BCS 1982 and BCS 1992), this work attempts to measure the effects of individual socio-economic characteristics and victimization history of women in England and Wales on their likelihood of receiving at least one nuisance call. To make the logit modelling analysis more tangible, risks of nuisance calls are calculated from our models of five hypothetical women, single mother, professional, student, housewife and pensioner, with specific attributes taken from the set of explanatory variables.     

冬虫夏草对肾小球系膜细胞增殖的影响

目的：观察冬虫夏草菌丝对体外培养的大鼠系膜细胞(MsC)增殖的影响。方法：应用血清药理学，使用氚标胸腺嘧啶([^3H]-TdR)掺入法检测大鼠肾小球MsC增殖。结果：含虫草菌丝血清可抑制MsC的增殖。结论：虫草菌丝可用于肾小球硬化的防治。     

涉案电话通信信息与犯罪侦查

涉案电话通信信息既包括与犯罪嫌疑人本身所持有、使用的手机、程控电话、IC卡电话等通信工具有关的信息,也包括被犯罪分子盗、抢、骗手机的通信信息。它具有时限性、对象性、价值性、保密性等特性,可以通过现场勘验检查、调查访问、电信部门和其他途径获取。利用涉案通信信息开展侦查的方法多种多样,而且具有极大的灵活性,需要侦查主体充分发挥创造性思维加以运用。涉案通信信息在犯罪侦查中的运用已经日益显示其重要性,为了提高在犯罪侦查中利用涉案通信信息的效能,应在侦查人员中普及电信基本知识,建立通信信息查询系统,加强与电信部门的联系和协作配合,制定相关法律法规,细化和规范利用涉案通信信息的侦查行为。