智能化小区可视对讲系统中控制网络的设计

Java技术最初是通过客户端运行Applet来给网页增加交互性，将网络应用程序从静态的简单网页集合．提升到具有交互性的高级层次。由于基于B／S模式网络应用程序的发展，为了让Java平台在客户端发挥它的最大潜力，又有了许多新技术。文中。我们结合开发工作流设计的应用探讨并阐述了如何利用这些技术。     

用WebORB实现Flex＋．NET的RIA应用程序

ILIA（Rich Intemet Applications）技术利用具有高度交互性的胖客户端（Rich Client）为用户提供比传统HTML或动态网页更丰富更全面的网络应用。本文建立了基于Flex＋.NET的ILIA程序结构,使用数据服务组件WebORB实现了基于AMF的Flex客户端对．NET服务器上的远程对象的调用。     

Applet工具

Java applet程序是一种可以通过网络下载并在一个浏览器中运行的小程序,它的出现使原先静态的Web页变得具有交互性了。 新型易用的Java applet工具使每个人都能够设计出动画和Web表格这样的Java applet程序,并将其加入到网页中。     

基于Interbus的控制系统网络虚拟实验室的设计与实现

介绍通过使用COM/DCOM连接技术、编写Interbus OPC客户端控制程序、编写过程控制级的PLC系统的过程数据、以及使用TCP/IP技术、构建OPC服务器,实现了控制程序与远程网络的通信,实验面板的具体实现主要应用Java语言,利用Java applet小程序嵌入网页中得以实现,从而提出了一种可行的虚拟实验室方案即控制系统网络虚拟实验室。     

基于Interbus的控制系统网络虚拟实验室的设计与实现

介绍通过使用COM／DCOM连接技术、编写Interbus OPC客户端控制程序、编写过程控制级的PLC系统的过程数据、以及使用TCP／IP技术、构建0PC服务器，实现了控制程序与远程网络的通信，实验面板的具体实现主要应用Java语言，利用Java applet小程序嵌入网页中得以实现，从而提出了一种可行的虚拟实验室方案即控制系统网络虚拟实验室。     

AJAX与J2EE的新型结合

传统的B/S构架下,由于浏览器的限制,网络应用的交互性能一直难以有所提升。AJAX是最新出现的面向异步消息通讯机制的网络应用客户端构建技术。给出了AJAX的概念、特点及关键技术,列举了目前AJAX技术中尚存在的问题和缺陷。     

基于Pushlet推技术的网络应用程序开发的研究

服务器推技术（pushlet）可将变化的数据主动地推送到客户端的浏览器中,客户端利用网页开发技术将服务器传送过来的数据直接更新到浏览器的网页中,实现了网页的局部更新,而不再需要重载页面或重新刷新Java小应用程序的全部内容,达到了减少服务器的数据传送负载,减少网络资源消耗的目的。     

基于NTP的网络时间服务测量

时间同步技术是现代网络应用和分布式系统中的核心技术。首先分析了Internet网络时间协议NTP(Network Time Protocol),并开发了基于Java的NTP客户端。通过对客户端采集数据的分析可以看到,随着网络链路延迟的增加, NTP协议的时间偏差和方差也会逐渐增茄。     

基于两点式的Jsp信息传送模式与实现

Jsp作为一种动态网页技术标准,其实现过程中需要用到包括:HTML语言、Java程序设计、数据库编程等方面的技术,虽然其构成包括需要庞杂的内容,但是对于其核心知识的理解可以通过两点模式来进行,即服务器同客户端之间的信息交互。     

Java Applet运行浅论

Java Applet程序的特色,是不能够自行运行的,它必须要进行内嵌网页后才有有完整的网络运行能力。Java Applet内嵌网页后,我们能够支持文字、图案、音频和视频等的处理。因此,为了能够在HTML网页中使用相关功能,要正确的对Java Applet内嵌网页进行程序运行,包括编辑Java Applet程序,翻译Java程序,将程序直接内嵌到网页文件中,以及分析程序结果。     

Java动态类加载机制分析及其应用

Java 虚拟机(JVM)中的类加载机制可以在 Java 应用程序运行期间动态加载类文件, 而不影响其它功能模块的正常运行. 通过对 Java 类加载器的层次体系结构, 动态类加载机制原理、实现过程进行分析, 将Java动态类加载机制应用到高校网站管理平台的文件发布模块中, 使得设计好的静态网页和后台管理系统相关联, 通过自定义加载器来加载加密过的Java类文件. 这样以可插拔的方式快速的部署二级网站, 增强了网站管理平台的灵活性和可扩展性.     

An ontology-based framework for improving color vision deficiency accessibility

Universal Access in the Information Society - Web technologies provide resources for the intensive use of colors in web pages. They are a core element in the design of interactive interfaces and...     

基于数字化模型的三维在线客户化产品订购系统

提出了建立三维数字化电子商务网站的构想与实现方案,该系统采用B/S模式,从CAD得到VRML模型。通过EAI接口与VRML浏览器的交互实现客户化,通过JavaRMI实现前台与服务器的通信,并且采用JDBC来操纵后台数据库,文中开发了一个沙滩车定制的原型系统,顾客可以根据自己的个性需求配置颜色。样式等,并能实时地看到产品的三维效果。与传统的电子商务模式相比,该系统增强了产品的个性化色彩,提高了与客户之间的交互能力,丰富了现有电子商务网站的形式与内涵。     

Towards a contingency approach with whitelist- and blacklist-based anti-phishing applications: what do usability tests indicate?

In web browsers, a variety of anti-phishing tools and technologies are available to assist users to identify phishing attempts and potentially harmful pages. Such anti-phishing tools and technologies provide Internet users with essential information, such as warnings of spoofed pages. To determine how well users are able to recognise and identify phishing web pages with anti-phishing tools, we designed and conducted usability tests for two types of phishing-detection applications: blacklist-based and whitelist-based anti-phishing toolbars. The research results mainly indicate no significant performance differences between the application types. We also observed that, in many web browsing cases, a significant amount of useful and practical information for users is absent, such as information explaining professional web page security certificates. Such certificates are crucial in ensuring user privacy and protection. We also found other deficiencies in web identities in web pages and web browsers that present challenges to the design of anti-phishing toolbars. These challenges will require more professional, illustrative, instructional, and reliable information for users to facilitate user verification of the authenticity of web pages and their content.     

基于DIV+CSS的网页布局技术应用

该文通过对DIV和CSS技术的特点与CSS盒子模型的介绍,解析了采用DIV+CSS进行网页布局能使网页的表现和内容相分离、代码简洁、方便搜索引擎搜索、提高网页传输速率和易于网页的更新与维护等优势。而且通过具体实例给出了DIV+CSS网页布局技术的流程和方法。     

基于Java的Web应用全球化自动测试设计

随着Internet的广泛应用,基于Web页面的应用已成为当前计算机应用软件中最常用的形式。每一个Web软件产品都会有很多Web页面,尤其是支持多种语言的应用,由于如今对Web应用的测试绝大部分还是手工完成,进而带来了测试难度和工作量问题。描述了如何用Java和J2SE1.4来部分实现Web页面全球化的自动测试架构。     

Development nature matters: An empirical study of code clones in JavaScript applications

Code cloning is one of the active research areas in the software engineering community. Specifically, researchers have conducted numerous empirical studies on code cloning and reported that 7 % to 23 % of the code in a typical software system has been cloned. However, there was less awareness of code clones in dynamically-typed languages and most studies are limited to statically-typed languages such as Java, C, and C++. In addition, most previous studies did not consider different application domains such as standalone projects or web applications. As a result, very little is known about clones in dynamically-typed languages, such as JavaScript, in different application domains. In this paper, we report a large-scale clone detection experiment in a dynamically-typed programming language, JavaScript, for different application domains: web pages and standalone projects. Our experimental results showed that unlike JavaScript standalone projects, JavaScript web applications have 95 % of inter-file clones and 91–97 % of widely scattered clones. We observed that web application developers created clones intentionally and such clones may not be as risky as claimed in previous studies. Understanding the risks of cloning in web applications requires further studies, as cloning may be due to either good or bad intentions. Also, we identified unique development practices such as including browser-dependent or device-specific code in code clones of JavaScript web applications. This indicates that features of programming languages and technologies affect how developers duplicate code.     

Transactional Multimedia Banner as Web Access Point

Currently there is an explosively growing amount of back-end services available (e.g., business to business (B2B) commerce, business to consumer (B2C) commerce, and infomercial services) in the Internet. These services are mostly accessible through static HTML web pages at a few specific web portals. Advertising in TV broadcasting has shown that multimedia is a very effective means to present merchandise and attract shoppers. This has been applied to the Web by including animated multimedia banner ads on web pages. However, the issues of coupling interactive browsing, shopping, and secure transactions, e.g., from inside a multimedia banner, have only recently started to being explored. In this paper, we will investigate the feasibility of using interactive multimedia banners as pervasive access point for the B2C, B2B, and infomercial services. We present a system architecture that involves a layer of middleware agents functioning as the bridge between the interactive multimedia banners and back-end services. The findings suggest that the middleware agents can not only convey the B2B services to the individual consumers via multimedia banners, but also simplify the design of the middleware agents by using the standardized B2B application interfaces. As a specific case study, the use of interactive multimedia banners, communicating with a browsing/transaction middleware agent in accessing the catalog and shopping services, over the Internet will be discussed and prototyped. The system architecture under study consists of an interactive multimedia banner (such as a banner-ad, or the display of merchandise in a catalog), a browsing agent, and a transaction agent. Such interactive multimedia banners allow users to browse and buy the merchandise in the e-mall directly from the banner. The browsing agent enables interactive browsing within the banner. The transaction agent interfaces with various e-commerce servers and existing e-malls to complete the transaction securely. We implement a pure Java based shopping system to investigate the feasibility of this architecture. The initial implementation results indicate that this architecture provides a tight and general integration between multimedia browsing and secure transactions and significantly reduces user interactions needed to choose the merchandise and close the transaction.     

The role of context in perceptions of the aesthetics of web pages over time

An important aspect of the empirical study of user experience is the process by which users form aesthetic and other judgements of interactive products. The current study extends previous research by presenting test users with a context (mode of use) in which to make their judgements, using sets of web pages from specific domains rather than unrelated pages, studying the congruence of perceptions of aesthetic value over time, including judgements after use of a web site, manipulating the aesthetic design of web pages and studying the relationship between usability and aesthetic value. The results from two experiments demonstrate that context increases the stability of judgements from perceptions after brief exposure to those after self-paced exposure and from perceptions after self-paced exposure to those of after site use. Experiment 1 shows that relatively attractive pages are preferred over relatively unattractive pages after brief exposure, but only if no context is provided. Experiment 2 shows that after brief exposure, classically aesthetic pages that are information oriented are rated as more attractive than expressively aesthetic pages. Perceptions are not correlated with measures of task performance or mental effort. We conclude that context is a pivotal factor influencing the stability of users’ perceptions, which must be explicitly addressed in the study of users’ product experience. Furthermore, the type of aesthetics that is relevant to users’ perceptions appears to depend on the application domain. The principle ‘what is beautiful is usable’ is not confirmed.