虚拟企业的信息基础结构研究

虚拟企业由若干基于同一市场机遇的成员企业组成，它的正常运作必须借助于信息基础结构的支持。本文分析了虚拟企业的信息资源特点——异构性、自治性、分布性，并由此采用客户／服务器结构的思想，提出一种虚拟企业信息基础结构的构建方案，此信息基础结构可以通过CORBA、STEP、WWW及工作流管理的有效集成，满足虚拟企业的信息共享需求，响应其动态性变化。     

超文本系统信息结构组成元素—链的分析

链是超文本的灵魂。文章通过对超文本系统信息结构组成元素－－链的分析，探讨了超文本系统信息结构中所应用的各种不同类型的链接。     

Antecedents of privacy calculus components in virtual health communities

Over the past decade, social media technologies have become effective tools not only for entertainment, but also for online health communications. In virtual health communities (VHCs), the members often share their personal health information (PHI) with other members. These information exchanges provide benefits to both the information providers as well as the recipients. The PHI disclosure, however, may entail privacy concerns. Our study used the privacy calculus model to examine the trade-off between individuals’ expected benefits and privacy concerns when disclosing PHI in social media environments. Our results showed that age, health status, and affective commitment influence the balance between the information disclosure drivers and barriers in the privacy calculus model. More specifically, we found that among members of VHCs, healthier people expect to receive fewer personal benefits of communicating PHI in social media environments. Moreover, individuals who are emotionally attached to online communities expect to both receive and provide more benefits while communicating PHI in those communities. We also observed that individuals who are familiar with but not members of VHCs, especially those who are young and healthy, are more concerned about their PHI privacy in online communities.     

三维虚拟学习环境下的外语教学——来自实习教师的报告

当下,许多教育研究者主张利用多用户虚拟环境辅助课堂教学。在基于多种媒介的多用户虚拟环境中,＂第二人生＂是最受欢迎的一种。论述美国有关职前教师对中国学生在＂第二人生＂三位虚拟学习环境下的英语外语教学这一研究项目的案例,集中探究职前教师在使用＂第二人生＂进行英语教学实践中的体会与相关讨论,并为该项目的进一步深入研究提出建议。     

基于网络环境下图书馆虚拟体系的建构

本文由Virtual一词的内涵生发开去，着重讨论虚拟与图书馆的关系及图书馆虚拟体系的建构。     

Group Behavior and Learning in Electronic Forums: A Sociotechnical Approach

The term community is widely and often uncritically used to characterize groupings of people who meet in electronic forums (e-forums). The research reported here shows how the casual use of the term community to characterize these groups can actually undermine their transformation into forms of social organization that are justifiably characterized as communities. This article examines how transforming a group into a community is a major accomplishment that requires special processes and practices. Primary data come from a particular project, the Inquiry Learning Forum (ILF), that aimed to develop "communities of practice" (CoPs) among high school science and mathematics teachers through an elaborate dedicated web site. We examine participants' behaviors in some of the differently structured forums within the ILF web site. While the project's developers expected CoPs to develop autonomously, there was no evidence of CoP formation in open public online forums. The article contrasts two approaches to building online communities that differ sharply: "IT-led community development" and "IT-supported community development." The experience of the ILF project shows that IT-led strategies community development strategies are much more difficult to make workable than are the "IT-supported" strategies.     

The academic library: Structure,space, physical and virtual use

This mixed-methods study aims to characterize the appropriate structure of the academic library in the information age according to the perceptions of the faculty members who use the library and the academic librarians operating it. Two main issues were addressed: centralization versus decentralization, and the provision of physical versus virtual services. The study population included members of the faculties of Humanities and Social Sciences in three academic institutions in Israel and academic librarians working in these institutions. Qualitative data was collected through interviews with 20 faculty members and 15 librarians, while quantitative data was collected through questionnaires filled by 191 faculty members and 50 librarians in the above-mentioned institutions. Analysis of these data reveal that faculty members generally prefer a concentration of materials—rather than decentralization—and they show a similar preference toward a faculty library model, a combined faculty/departmental library model, and a central library model. Similarly, the academic librarians prefer either faculty or combined faculty/department libraries, but their preference toward a central library model is lower than that of the faculty members. The decentralized, departmental library model was the least favored by both groups. In addition, our findings indicate that both the faculty members and the librarians appreciate the virtual services that the library provides as well as its physical presence, although fewer faculty members than librarians perceived the latter as an important role of the library. Taken together it appears that the preferred model for the academic library in the information age is of large, multidisciplinary libraries that contain materials from a variety of fields and provide comprehensive virtual services.     

Ask Me Anything!: Reaching out to Online Students in Higher Education through Librarian-Led Virtual Office Hours

Offering students synchronous research and reference help can be a challenge for libraries that offer services at a distance. Virtual office hours can be a means of overcoming this challenge, allowing patrons the opportunity to seek timely point-of-need assistance. The author implemented a librarian-led virtual office hours pilot project at her home institution, Athabasca University. The program was initially received enthusiastically, but fewer and fewer patrons availed themselves of the service as the pilot progressed. This paper explores the implementation of the virtual office hours pilot project and its outcomes, and concludes with a discussion of how the pilot could have been more successfully carried out.     

职业学校用低频虚拟示波器的设计

介绍了一种基于AT89S52单片机和Lab VIEW实现的低频虚拟示波器。将数据采集卡所采集的数据通过USB口送到计算机,然后计算机根据虚拟面板的设置,通过调用动态链接库对数据进行相应的分析、处理,并在屏幕上显示出处理结果,实现与真实示波器相类似的功能。该低频虚拟示波器软件面板设计形象,易于操作,实用性强,可应用于职业学校的教学、实验。