基于ScienceDirect Online的电子期刊数据库的检索功能

ScienceDirect Online是Elsevier Science公司将在中国推出的新平台，可在线提供电子期刊、图书和文摘数据库的检索。本文详细介绍了此平台电子期刊数据库的检索方式、检索技术、检索技巧等，对专业检索人员和科研人员检索期刊文献具有指导意义。     

医药卫生期刊光盘检索中选择主题词初探

本文简要探讨了在医药卫生期刊光盘检索中如何进行主题词选择的问题。共分 4点进行探讨。1、要真正理解课题的内涵。检索人员必须认真阅读该课题的申请书、说明书、投标书、论文及相应的背景材料 ,与申请者进行充分交谈 ,方能对课题内容了如指掌 ,才能定好主题词 :2、检索人员要熟悉掌握生物医学文献检索理论知识和实践技能 ,并有较系统的解剖生理等医药知识 ,才能对课题内容有全面的理解 ,不会出现顾此失彼现象 ;3、检索人员必须具备有较高的外语水平和较强的医学检索综合分析能力 ,对于医药专业中的学名、常用名和商品名要有充分的感知能力 ,在奥妙的名词转变中不会迷津 ,4、要根据课题的主要技术特点、性能等诸方面内容 ,对课题的内容、特点、可能涉及的技术领域进行分析 ,经常了解、复习和学习常见的医药卫生常识。只有这样才能在医药卫生期刊检索中 ,选择正确的主题词。     

知网、万方及维普期刊全文数据库医学文献检索的比较

为了解知网、万方、维普期刊数据库医学文献检索区别,以篇名、关键词为检索字段,以"食管癌""治疗"为检索词,在知网、万方、维普期刊数据库分别检索,对3种期刊数据库检索出的论文数量进行了对比,对收录的期刊进行了分析,得知3种期刊数据库检索标准不同,检索方式不同,期刊收录重复率较高。     

西文生物医学期刊全文服务系统(FMJS)探讨

西文生物医学期刊全文服务系统（简称FMJS）是集文献检索、馆际互借和全文传递等功能为一体的综合性文献服务系统,实现了西文生物医学期刊资源的共享。文章介绍了FMJS的概况、特点、检索途径及检索结果处理等,同时对该系统的进一步改进提出了建议。     

我国科技文献检索期刊概况

科技文献检索期刊是报道和查找科技文献的重要手段,是积累科技知识和传递科技价息的主要工具,也是我国自然科技期刊不可缺少的组成部分。我国从1956年开始编译出版检索期刊,1965年即达到139种,年报道量3亿字。1980年后,随着我国科学技术的迅速发展,中国科学技术情报编译出版委员会颁布了《关于建立健全我国科技文献检索刊物体系的方案(草案)》。在该《方案》指导下,检索期刊质量不断提高,期刊布局日趋科学合理,避免了重复报道、填补了空白学科,推动了我国检索期刊的发展。至1985年,我国检索期刊增加到219种,年报道量140万条。1987年后,由于主观和客观环境的影响,检索期刊种数下降,目前已基本稳定(见表1)。     

因特网上学术类电子期刊的检索和利用

着重介绍了网上学术类电子期刊的检索问题,从检索工具、检索过程、获取原文几个方面进行说明,并提出了电子期刊检索中存在的一些问题,最后针对图书馆电子期刊的开发利用提出一些见解。     

专利检索浅析

通俗地说．检索就是对有关信息的查找。专利检索从字面上理解,是对有关专利信息的查找．但实际上．专利检索往往不仅是对专利信息进行查找,通常也要查找相关的非专利信息,包括期刊上的文章、论文和技术标准等。例如．专利局的审查员在对一件发明专利申请进行实质审查时．就要对专利信息和非专利信息都进行检索．如果检索到一篇与该发明专利申请技术主题相同的非专利文献．并且这篇非专利文献在发明专利申请的申请日之前就发表了．这篇非专利文献同样可以破坏该发明专利申请的新颖性或创造性。     

论CNKI非专利文献公开日期的确定

近年来,随着高校专利申请量的不断增加、检索策略、检索范围的不断研究和拓展,使用期刊、硕/博论文作为对比文件的情况越来越多,但由于期刊、硕/博论文的较早或确切公开日期的确定存在困难,导致对上述形式的现有技术的认定存在诸多争议,为此笔者对CNKI的期刊、硕/博论文的公开日期的确定进行了研究和论证,得出如下结论：①对于期刊类文献,通过CNKI＂进入总库检索＂得到的相关文献的＂发表时间＂为本期刊类文献的较早、确切公开日期;②对于硕/博论文,通过CNKI＂进入总库检索＂得到的相关硕/博论文的＂更新时间＂为本硕/博论文的较早、确切公开日期。     

SpringerLink全文期刊数据库及其检索

介绍了全文期刊数据库SpringerLink系统的特点和功能以及该数据库的检索方法。     

改革开放以来我国期刊研究的文献计量学分析

为了揭示期刊研究领域的现状和发展情况,检索了中国知网(CNKI)1978年1月~2013年12月收录的关于期刊研究的论文,统计和分析了该主题论文的文献数量变化、期刊分布、作者队伍、研究机构、基金和主题分布,以期为关注该领域的研究人员和决策者提供启示和信息参考。     

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