Web学术信息资源环境中的参考链接技术

参考链接技术是网络学术信息资源集成的一种重要手段。本文在概述的基础上,分别对静态链接技术和开放式参考链接技术的原理、主要构件及实例系统进行了深入地分析阐述,并展望了参考链接技术的未来发展。     

基于OpenURL的开放式参考链接

参考链接在学术研究中具有重要作用。简单回顾了传统链接方式的缺点，在此基础上介绍了基于OpenUPL的开放式参考链接及SFX机制。     

知识链接的研究现状与发展趋势

文章通过概述知识链接的概念和内涵,阐述了知识链接的产生背景、作用和功能。在综述近年来知识链接研究现状基础上,提出了知识链接的发展趋向。目前知识链接研究与实践主要集中在基于引文的关联检索和聚类分析、基于参考链接技术的文献交叉揭示与集成整合、基于关系的信息组织与知识概念关联3个方面。下一步知识链接将朝着面向科研环境的开放式跨界链接、基于用户行为的个性化推荐链接、基于本体的语义关系链接、面向科研评价的知识要素链接、基于知识元的知识组织链接等方面发展。     

文献检索系统开发研究

使用基于网络技术的PHP、Apache、My SQL等技术开发用户操作功能和管理员管理等功能来检索文献。并概述了该系统的主要页面链接构成与数据库架构等主要结构组成和PHP链接数据库等几个关键部分的技术。     

基于引文的知识链接系统构建

以引文链接为基础,结合主题链接、行为关联链接、本体链接等关联方式实现基于引文的知识链接系统,其系统结构可以划分为数据层、工具层、链接层、用户层4个层次,并具有数据解析、知识关联、知识分析、评价以及链接展示等功能。系统强调引文关系链接和知识概念关联,可以有效整合国内外各种引文信息源,构建一个综合的学术信息资源链接平台。     

Web2.0环境下的链接关系研究*--以博客和百度百科为例

将文献计量学中的“引文冶引入到网络计量学中,对网络环境下的链接进行了重新定义,即链接不再是简单地网页和网站之间的超链接(Hyperlink),而是通过这种超链接形式表现出来的学术关系。结合Web2.0的特征,主要以博客和百度百科为研究对象,探讨了Web2.0环境下的5种链接关系及其在知识交流中作用。5种链接关系分别为好友链接、参考链接、评论链接、评论-反馈链接、合作链接。     

基于页面链接挖掘的Web教育信息检索

教育信息检索是教育信息应用于教育科研与教育教学的关键环节，而Web页面链接挖掘是对Web页面之间的链接结构进行挖掘。本文对Web链接结构挖掘在教育信息检索方面上进行了研究，介绍了Web挖掘的概念、分类，以及HITS与Page—rank等算法，并提出了一种基于样本模式特征提取的信息检索方法。     

基于页面链接挖掘的Web信息检索

对Web链接结构挖掘在信息检索方面上进行了研究，介绍了Web挖掘的概念、分类，以及HITS与Page-rank等算法，并提出了一种基于样本模式特征提取的信息检索方法。分析了Web链接挖掘面临的问题和未来研究的发展趋势。     

科技价值链及创新主体链接模式

本文探讨了科技价值链系统创新管理理论。在阐释科技价值链概念的基础上，建立了从科技创新源到成果产业化全过程中科技价值链的结构模型和数学模型。分析了科技价值链七类组织节点及其链接模式．指出六种基本链接单元是构建科技价值链复杂系统的基本结构单位。研究了三种关键创新环及其与科技价值链系统创新的关系，对企业科技价值链与多元化创新主体及国家和区域创新系统的多种链接方式进行了讨论。     

生态工业园区的内部结构

通过对生态工业园区内企业内部及企业之间物料交换特征的分析，将生态工业园区内企业链接划分为单链结构、并联结构、网状结构等几种模式，并对这几种模式的特点、适用行业作了分析对比。     

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.