ASP.NET AJAX框架及其在Web开发中的应用

AJAX（Asynchronous JavaScript And XML）是Web开发中的应用技术。AJAX技术既能够减少整页刷新产生的白屏现象,同时还能有效降低服务器负荷。Microsoft公司新推出的ASP.NET.AJAX框架,与ASP.NET2.0实现无缝结合,程序开发人员可利用其降低Web开发难度。介绍了ASP.NET AJAX原理,以及如何充分利用其原理应用在Web开发中的方法。     

一种基于ASP.NET技术的电子商务网站

ASP．NET已经成为Web应用程序开发的主流环境,基于ASP．NET技术构建了一个实现网上购物的电子商务网站系统,并详细介绍了电子商务网站各功能模块的设计与实现方法。     

ASP.NET中页面间传值方法的实现

开发Web应用程序时,最重要的就是需要处理浏览器和Web服务器之间的交互,其中Web页面之间的值传递就显得更为关键。在ASP.NET框架所提供的用以页面间传值的方法有很多种,每种方法都有自己的特点,详细了解其方法的特点,并在程序开发中灵活应用,对优化程序的性能有很大帮助。就ASP.NET开发环境所提供的页面间传值的方法进行阐述与讨论。     

基于ASP.NET的Web应用程序安全性探讨

安全性是ASP．NET Web应用程序的一个重要方面。总结了有关Web应用程序中出现的安全问题及其对策,以减少常见的安全威胁,保护应用程序中的资源。     

基于Microsoft.NET平台的ASP.NET技术

介绍了微软下一代开发平台Microsoft.NET的技术框架，分析了ASP．NET的技术特点及其实现方式，说明ASP.NET开发环境能创造出更加动态、伸缩性更强的Web应用程序。     

项目驱动教学法在《ASP．NET程序设计》教学中的应用

本文针对（ASP．NET程序设计》这门课程传统教学方法中所存在的弊端,主要介绍了项目驱动教学法在高职计算机应用专业《ASP．NET程序设计》教学过程中的应用情况,该教学法在本课程中的应用能提高学生的学习能力、创新能力、分析和解决问题的能力。     

ASP.NET在图书馆数字资源建设中的应用

ASP．NET是一个提供各种网络服务的统一平台，能较好的通过Web页完成数据操作、文件传说等多种功能。本文简要介绍ASP．NET实现数据库访问、文件上传、Email发送及Web服务方式。     

身份验证和登录安全控制的应用研究

对于大多数Web应用程序来说,身份验证和登录安全控制是非常重要的部分,也是Web应用程序的开发难点。本文将简要介绍ASP．NET2．0中的成员资格管理功能,并遥过Web．config文件配置将登录系列控件和成员资格管理功能完美结合,设计一个Web应用程序的登录控制应用实例及其扩展应用。     

移动Web应用程序

介绍ASP.NET移动控件添加到ASP.NET Web窗体的扩展过程。ASP.NET为移动设备提供的Web应用程序模型与为面向桌面浏览器的ASP.NET应用程序提供的模型一样丰富。     

ASP．NET DropDownList控件的研究与应用

随着互联网技术的快速发展,出现了大量的基于Web应用程序。ASP．NET是当前开发Web网络应用系统的主流技术之一。在开发实际的Web用户界面时,要用到多种用户数据输入控件,DropDownList就是最常用的控件之一。概述了ASP．NET技术以及DropDownList控件特性,结合实例对DropDownList控件应用进行了探讨,阐述了DropDownList控件的动态绑定数据库、联动功能、自动刷新问题的解决以及可输入选项的实现方法,对于开发Web应用系统有较高的实用价值。     

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.     

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.     

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