隐私保护云存储架构的研究

随着计算机信息产业的发展,数据量正在以几何级数的方式迅速增长,传统的单机模式很难满足大量的数据存储任务,且企业软硬件维护成本高昂。云存储的出现为上述问题的解决提供了可能,然而近年出现的问题引起了人们对云存储的隐私安全的思考。介绍了近年来研究学者们在云存储隐私保护方面所做的工作,提出了一种基于非对称加密挑战-应答模式身份认证的加密搜索隐私保护机制,对今后云存储数据隐私保护的可能发展方向做了预测。     

论新媒体舆论的生命周期理论模型

理论模型是新媒体研究得以深入的重要基础。新媒体舆论生命周期理论模型的提出,是基于任何一个热点话题引发的新媒体舆论都经历了从有到无的过程,其演变发展符合舆论酝酿期、爆发期、消解期这样的周期规律。综合舆论形成的相关理论和新媒体舆论事件的实际发展情况,我们采用纵向分析法将新媒体舆论的形成、演变过程分为四个阶段：（一）议题出现期;（二）新媒体舆论存活期;（三）新媒体舆论归纳整合期;（四）新媒体舆论消散期。据此建立“新媒体舆论的议题出现、存活、整合、消散模型”。     

郑州市地下水渗流场的数值模拟和优化管理

建立准三维数值模拟模型和优化管理模型对郑州市地下水资源进行评价、管理。以非均质各向同性渗流模型模拟地下水流,用不规则三角网格有限差分法求解。先解逆问题反求参数,再解正问题计算地下水各项资源量,并数值预报地下水渗流场至1998年。将模拟模型与规划模型相耦合,建立了地下水资源优化管理模型。     

日本农村社会保障体系建立及启示

日本现代化进程中,在农村建立起了完善系统的、覆盖面巨大的社会保障体系。对维护农民利益、发展农村经济、实现农业现代化起到了非常重要的作用。日本农村社会保障体系的建立与完善,对我国农村"三化同步"的建设,对我国推进农村社会保障体系的发展起到一定的启迪借鉴作用。     

土地规划环境影响评价中公众参与的意义

对公众参与在土地规划环评中的工作原则和积极意义作了梳理和探讨,以期为规划环评中公众参与的具体进行提供有益的参考。     

社会学视野中的公共安全分析

现阶段我国公共安全问题已延伸到社会各个领域,须以科学安全观对公共安全进行再思考。西方社会学家对公共安全有其独特分析视角。透析社会公共安全问题,诱发公共安全事故的原因是多元的;我国公共安全问题的解决路径,是要加强立法建设,建立起公共安全综合管理体系。     

基于动态基线分析方法的网络蠕虫检测机制的研究

提出了一种基于NetFlow的动态基线的蠕虫检测新方法。该方法利用NetFlow网络信息监测工具,每五分钟采集一次各通讯端口的信息,以其通讯端口、时间、流量三个维度所建立的信息基线过滤与基线偏离的信息,便可筛选出符合蠕虫行为的信息数据,进而找出可能的蠕虫及受感染的节点。     

郑州城区屋顶绿化的现状及发展对策

通过对郑州市城区屋顶绿化状况的调查,统计出了其屋顶绿化中的面积、类别、植物类型、种类、数量等指标,分析了其屋顶绿化的现状和存在的问题,并提出对策.     

Walls of resonance: Institutional history and the buildings of the University of Manchester

The built environments of universities are useful for telling stories about their development. Exteriors – walls, windows, doorways, the relative positioning of different facilities – are particularly suited to broad institutional narratives: the rise and decline of scientific disciplines, for instance, or the institution’s changing relationship with benefactors and the wider public. Exteriors are also conveniently accessible to public audiences.This paper explores the possibilities through the case of the University of Manchester. The approach is in a sense the converse of industrial archaeology, which seeks to understand the functioning of a site from what survives of its material form: here, we have begun with knowledge gained largely from document sources, and aim to bring it to life for visitors by pointing to the material consequences. Connecting doors and architectural symmetries illustrate founding unifications and alliances; infilling and glassing-over, constrained expansion; grand but obscured frontages, displaced priorities.Populating the site with accounts of its lived existence is a powerful tool to communicate history, but it is important not to create an ‘official’ memorialisation: audiences often know the site at first hand, and may question any received version. I conclude by calling for a reflexive treatment, mapping the histories of the stories themselves.     

Human bodies as chemical sensors: A history of biomonitoring for environmental health and regulation

The testing of human blood and urine for signs of chemical exposure has become the “gold standard” of environmental public health, leading to ongoing population studies in the US and Europe. Such methods first emerged over a century ago in medical and occupational contexts, as a means to calibrate drug doses for patients and prevent injury to workers from chemical or radiation exposure. This paper analyzes how human bodies have come to serve as unconscious sensors of their environments: containers of chemical information determined by expert testers. As seen in the case of lead testing in the US, these bodily traces of contaminants can provide compelling evidence about dangerous exposures in everyday life, useful in achieving stronger regulation of industry. The use of genetic testing of workers by Dow Chemical provides an example of industry itself undertaking biomonitoring, though the company discontinued the program at the same time its studies indicated chromosomal damage in connection with occupational exposure to certain chemicals. In this case and others, biomonitoring raises complex questions about informing subjects, interpreting exposure in the many cases for which health effects at low doses are unknown, and who should take responsibility for protection, compensation, or remediation. Further, the history of biomonitoring complicates how we understand human ‘experience’ of the global environment by pointing to the role of non-sensory—yet detectable—bodily exposures.