基于Linux平台的校园VPN应用

本文针对校外教工访问校园网资源的需要,构建了基于Linux的VPN系统,并在此基础上运用流行的网络语言PHP和数据库系统MYSQL设计了VPN用户的管理系统,运用Iptbales表对用户的访问进行有效的控制。构建于公共网络之上的校园虚拟专用网既可以实现安全、快捷传递信息的需求,又可以为学校节省大量的开支。     

基于一卡通实名认证的VPN设计实现

大部分校外用户采用VPN拨入方式对学校的图书馆资源进行访问,因此VPN系统中大量用户的合法验证和管理成为了构建VPN系统的关键.本文利用一卡通基础信息库,对VPN系统构架重新进行设计,实现通过一卡通认证的实名制VPN系统.该实名制VPN系统采用PHP设计自助式VPN账户申请维护界面,同时利用Mysql保存登录日志以备查询.     

基于VPN技术实现远程访问系统——以邢台职业技术学院为例

本文介绍了VPN技术,并分析了IPSec VPN和SSL VPN两种主流VPN技术特点。以邢台职业技术学院为例,详细阐述了如何利用VPN技术构建远程访问系统,让读者可以不受时空和地域的限制访问学院电子资源。     

基于Linux的高校图书馆SSLVPN系统搭建

简介VPN系统及在Linux操作系统上使用OpenVPN软件构建SSLVPN系统,阐述用户通过客户端与OpenVPN服务器建立连接可访问图书馆电子资源,并分析使用中的一些问题。     

VPN技术在高校图书馆的应用

在介绍VPN技术的基础上,就如何利用VPN技术解决高校用户访问校图书馆问题进行了探讨,并介绍了一款成熟的产品。     

基于SSL的VPN技术与安全性研究

SSL VPN是解决远程用户访问公司内部敏感数据最简单也是目前相对比较安全的技术：本文阐述了SSL VPN的基本原理及技术特点,并通过与IPsec VPN比较,对SSL VPN的安全性进行了系统的研究     

VPN技术在电子资源远程访问中的应用探讨

VPN是远程网络访问的一种安全、经济的技术手段。如何依托VPN技术,解决使用非校园网IP的合法用户远程访问图书馆电子资源问题,值得关注和探讨。本文针对目前较多采用的2种VPN技术———基于SSL和IPSec协议的VPN,从安全性、使用方便性、网络支持性,可扩展性等几个方面进行了比较分析,并提出SSL/IPSec一体化解决VPN远程访问的方案。     

基于VPN技术的西部高校数字图书馆信息安全应用研究

本文从信息安全的角度阐述了VPN在数字图书馆的实现技术及VPN远程访问和网络互联的高效低价、安全可靠的解决方案,探讨了VPN对数字图书馆建设中远程访问问题的解决方案,认为SSL VPN是解决远程用户访问数字图书馆信息资源最为简捷、安全的技术。     

VPN技术在校园网中的应用

VPN是在公共网络上构建专有网络的技术,将VPN技术应用于校园网,可以突破校园网的地域性限制从而优化校园网的管理和应用。本文在简述VPN技术的基础上,给出了该技术应用于校园网的具体方案,从而实现校区之间的虚拟专用网络连接,并且可以将校园专用网内资源被访问的区域范围扩展到任何连接Internet的地方。     

高校图书馆数字资源的远程访问研究

近几年VPN技术逐步趋向成熟,构建基于Internet的校园VPN网络,能够实现校外师生对图书馆数字资源的远程访问。本文提出了基于Windows Server 2003的校园VPN解决方案,也详细地介绍了VPN技术特性及其服务器和客户端的配置方法。     

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.     

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.     

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     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.