以安全网闸技术实现计算机网络安全

文章从当前我国互联网络信息安全的严峻安全形势入手,概要地分析了当前应对的相关安全防护措施,最后着重讨论了利用安全隔离网闸的物理隔离技术实现涉密网络的信息安全,以及具体的实现物理隔离的配置方案。     

基于多线程的网络隔离系统代理模块设计

在网络安全的技术中,物理隔离技术是很重要的一个组成部分。该文基于国家信息安全专项：“隔离专网之防病毒反入侵综合管理与更新网关的产品产业化”,再对照相关技术标准,提出了基于多线程的隔离网闸代理模块的设计方案。     

浅析电网调度物理隔离问题

介绍了电网调度物理隔离的概念,通过系统运行因果图和信息流程图,对物理隔离常出现的问题做出了说明.     

浅析单位内部网络的安全性

在网络技术迅速发展并得到广泛应用的今天,网络安全越来越受到人们的重视。本文分析了内部网络在与互联网物理隔离的情况下存在的安全威胁,初步提出了一套安全体系来保护内部网络。     

企业内部局域网安全技术的研究

由于计算机局域网在各级企事业单位中的普及应用,其安全性问题对于社会经济生活的稳定非常关键。该文首先从技术问题对网络的安全问题进行分析,然后从物理隔离技术、防止非法接入、安全管理制度3个方面,讨论了计算机局域网的安全解决方案与策略。     

关于局域网的安全分析

在Internet／Intranet技术迅速发展并得到广泛应用的今天,网络安全越来越受到人们的重视。本文分析了内部网络在与互联网物理隔离的情况下存在的安全威胁,初步提出了一套安全体系来保护内部网络.     

基于分布式系统的隔离网闸体系结构研究

很多涉密网络必须和外网实现物理隔离,但是实际中很多应用程序又需要在这种情况下仍然能正常工作。因此研究如何在保证物理隔离的同时,提供高带宽,低延时的数据传输效率,是一个很有意义的研究内容。本文在国家信息安全标准下,基于GAP思想建立了一套基于分布式系统的隔离网闸方案。     

浅析网络安全隔离模式

网络发展日新月异,网络攻击、木马程序层出不穷,如何有效的实现网络互通、资源共享,同时保证数据安全成为一项重要课题。本文对网络安全隔离模式进行了简要分析,并着重对物理隔离原理进行了具体论述。     

桌面虚拟化在气象业务中的应用

为实现气象内网与互联网相互隔离,保障信息安全与良好的上网体验,各单位在其电子政务建设的过程中,在满足政务内网与政务外网之间物理方式隔离的同时,实现政务外网与互联网之间逻辑方式隔离。aDesk单终端双网隔离解决方案借助自身优势将桌面系统、应用程序及用户所产生的文档数据,都运行或保存在云桌面服务器上,形成安全快捷的网络管理与远程桌面应用模式。     

物理隔离网闸的应用成效分析——以湖北日报传媒集团网为例

湖北日报传媒集团业务办公网络与互联网相联。同时,处理内部敏感信息的计算机以独立专网方式运行,与集团业务办公网络物理隔离。这种专网运行方式在最大限度保证信息安全保密的同时,也带来一系列的问题与不便。专网内计算机终端的防病毒软件升级只能人工操作,及时性难以保证;与业务办公网的数据交换不方便、不利于控制。改变这种状况的便捷方式就是将专网与业务办公网实现物理互联,在其互联处部署相关安全设备进行保护。物理隔离网闸设备可以提供更好的隔离效果和安全防护能力,确保专网的信息安全。对此进行了论述。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence