基于Flex和.NET开发RIA

在了解Flex和RIA的基础上,描述了基于Flex和.NET开发RIA（Rich Internet Application,富互联网应用程序）的流程,还介绍了Flex与WebService交互的简单示例,来演示Flex与Web Service通讯的过程。开发的RIA可以在不同的浏览器和操作系统上运行,只要装有Flash Player即可,它具有良好用户体验和稳定的性能,而且是一个跨平台、跨操作系统的系统。     

录波器组网应用探讨

开发一个基于RIA和Flex网络技术的电网故障信息网页发布系统,该系统提供了一种可自定义的灵活检索机制,并在网页上实现了故障录波数据双端测距,故障数据综合分析等功能。现详细介绍了实现方案和技术特色,提出了一种基于专业查询习惯的电网信息检索机制。     

基于Flex和J2EE架构的数据发布系统的设计与实现

提出了开发基于Flex和J2EE架构的数据发布系统,应用Flex作为展现层实现,应用Hibernate作为持久层实现,结合Spring技术作为业务层实现,进行框架整合,从而设计了一套松耦合、可扩展的RIA数据发布系统,初步解决了当前数据发布中存在的问题。     

Flex技术研究

Flex技术是集桌面应用程序的丰富界面效果与Web应用程序的广泛性、低成本及多媒体通信于一体的新一代互联网应用程序技术,具有高度的用户互动性和丰富的用户体验,是最领先和最成熟的RIA（富互联网应用程序）技术。主要讲述对Flex技术的初步认识。     

基于C/S和B/S模式相结合的Web考试系统

通过分析现代考试的需求,结合C/S模式和B/S模式的优点,利用Flex RIA技术,开发并实现了一种快速有效的Web考试系统。     

基于Flex的Cressman插值算法研究

Cressman算法是一种适用于气象数据的插值算法,目前基于C/S模式的Cressman插值算法在气象数据播值中应用较多且技术已经比较成熟,但传统的.net平台等都是基于页面服务器模型,在界面设计交互操作及响应速度等诸多方面不能令人满意.近年来出现的RIA(RichInternet Application)技术在交互及响应等诸多方面有着很大的优势,文章说明了Cressman算法的基本原理,并基于目前的RIA的主流技术Flex,实现了Cressman插值算法,并通过实际应用展示了这种算法的应用效果.结果表明:将Cressman插值算法应用于基于Flex的系统,可以进行较好的拟合内插.     

基于RIA的中学语文阅读网络协作学习平台的研究与设计

分析了网络协作学习的特点,介绍了RIA与J2EE的整合、中学语文阅读网络协作学习平台的主要功能和结构,并阐述了基于RIA与J2EE的架构来实现网络协作学习平台的方法和技术。     

基于Flex技术的档案馆在线文件管理系统的研究与设计

放弃了传统的B/S或C/S系统模式来构架应用系统.采用了RIA解决方案中的Flex技术时档案馆在线文件管理系统进行了研究与设计,不仅增强了应用程序的用户体验,而且提高了应用程序的开发效率.     

基于Flex技术的高校教学视频会议系统的设计

本文从高校教学视频会议的实际需求分析入手,采用流媒体的视频会议系统,客户端界面的开发使用的是能给客户提供丰富界面的RIA实现技术Flex,服务器采用的是开源的Java语言开发的新兴开源项目流媒体服务器Red4,Red4和Flex完美结合实现了高校教学视频会议系统,达到了客户的需求,解决了高校一校多区教学管理工作中遇到的突出问题。为探索高校教学管理工作提供了新思路、新途径和新措施。     

基于Flex的J2EE-MVC模式改进研究

在介绍Flex相关技术的基础上,分析了J2EE—MVC在表现层上的不足,给出了用Flex改进J2EE—MVC模式的新方法,并对Flex作为J2EE-MVC表现层的特点进行了解析。     

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