UWIS: An assessment methodology for usability of web-based information systems

A methodology for usability assessment and design of web-based information systems (UWIS) is proposed. It combines web-based service quality and usability dimensions of information systems. Checklist items with the highest and the lowest contribution to the usability performance of a web-based information system can be specified by UWIS. A case study by a student information system at Fatih University is carried out to validate the methodology. UWIS reveals a strong relationship between quality and usability which is assumed to exist by many researchers but not experimentally analyzed yet. This study depicts a strong relevance between web-based service quality and usability of web-based information systems. UWIS methodology can be used for designing more usable and higher quality web-based information systems.     

基于GML&SVG的城市地理信息系统的设计和开发

提出了利用GML对城市地理信息系统进行数据建模和表达的技术与方法。描述了如何利用SVG来实现基于GML描述的地理数据的显示和操作，并且在此基础上建立了基于GML＆SVG的城市地理信息系统的整体架构和设计方案。     

基于SVG的矢量图形编辑器的设计与实现

SVG是由W3C组织开发的一种开放标准的文本式矢量图形描述语言。本文在SAX的基础上提出了一种SVG解析模型,并设计和实现了一个矢量图形编辑器。该编辑器可以方便地对SVG文件进行可视化编辑。     

基于SAX和DOM的XML嵌套信息提取

层次关系是一份XML文件的重要信息。根据XML文件的设计规则,当它要描述的数据具有层次关系时,这种层次关系应该反映在相应的标记里面。因此,如果我们对一份XML文件进行分析,对其标记的层次关系进行提取,那么我们就得到了这些标记所描述的数据之间的层次关系。使用SAX和DOM两种机制,分别对XML文件进行了分析并对其标记所反映的层次关系进行了提取。     

Toward web-based information security knowledge sharing

Today IT security professionals are working hard to keep a high security standard for their information systems. In doing so, they often face similar problems, for which they have to create appropriate solutions. An exchange of knowledge between experts would be desirable in order to prevent developing always the same solutions by independent persons. Such an exchange could also lead to solutions of higher quality, as existing approaches could be advanced, instead of always reinventing the security wheel.This paper examines how information security knowledge can be shared between different organizations on the basis of a web portal utilizing Web-Protégé. It can be shown that through the use of ontologies the domain of information security can be modeled and stored in a human- and a machine-readable format, enabling both human editing and automation (e.g. for risk calculations). The evaluation of the web portal has shown that the most important challenge a tool for knowledge sharing has to face is the aspect of motivating users to participate in a knowledge exchange.Results from the evaluation have been used to further develop and enhance the web portal by implementing additional facilitating features. These features include a credit system, which rewards users for contributions, as well as the ability to select multiple entities, improving the system's usability.     

Scaffolding information problem solving in web-based collaborative inquiry learning

This study investigated the impact of different modes of scaffolding on students who are learning science through a web-based collaborative inquiry project in authentic classroom settings and explored the interaction effects with students’ characteristics. The intervention study aimed to improve domain-specific knowledge and metacognitive awareness during online information problem solving (IPS) as part of an online inquiry project. Three experimental conditions (teacher-enhanced scaffolding, technology-enhanced scaffolding, and both forms of scaffolding) were compared with a control condition in a two-by-two factorial quasi-experimental design. Moreover, gender and prior knowledge were examined as two factors which may have a significant impact on Web-based learning. In a four-week field study in secondary science education, pretest-posttest differences were measured. In total 347 students from 18 secondary school classes were involved and the classes were randomly distributed over the 4 conditions. Our findings support the notion of multiple scaffolding as an approach to enhance both knowledge acquisition and metacognitive awareness with respect to IPS-processes and to meet a mix of students with different needs within the context of a web-based inquiry learning project.     

Using consensus methods to construct adaptive interfaces in multimodal web-based systems

This paper presents a concept of adaptive development of user interfaces in multimodal web-based systems. Today, it is crucial for general access web-based systems that the user interface is properly designed and adjusted to user needs and capabilities. It is believed that adaptive interfaces could offer a possible solution to this problem. Here, we introduce the notion of the user profile for classification, the interface profile for describing the system interface, and the compound usability measure for evaluation of the interface. Consensus-based methods are applied for constructing the interface profiles appropriate to classes of users.     

基于SVG的WebGIS模型的构造研究

本文对当前WebGIS技术发展的状况进行了归纳和总结，同时，结合正在迅速发展的XML领域的分支－SVG，提出了一种全新的WebGIS模型，并从实现的角度对模型的细节进行了比较详细的说明。     

XML解析方式对比与分析

SAX解析技术适用于流式XML解析,系统开销低,但不支持多标签同步访问。DOM解析器首先遍历整个文档,构建Document对象,以树形方式建模XML数据,解决了多标签访问问题,但系统开销较大。     

A novel algorithm for performance prediction of web-based software systems

Performance metrics can be predicted with appropriate performance models and evaluation algorithms. The goal of our work is to adapt the Mean-Value Analysis evaluation algorithm to model the behavior of the thread pool. The computation time and the computational complexity of the proposed algorithm have been provided. The limit of the response time and the throughput sequences computed by the novel algorithm has been determined. It has been shown that the proposed algorithm can be applied to performance prediction of web-based software systems in ASP.NET environment. The proposed algorithm has been validated and the correctness of performance prediction with the novel algorithm has been verified with performance measurements. Error analysis has been performed to verify the correctness of performance prediction.     

XML文件解析中SAX和DOM的结合应用

针对目前XML文档的两种解析方法SAX和DOM各自的特点,探讨了在哪些情况下适宜将两种解析方法结合应用对文档进行解析,并给出了SAX和DOM结合应用的一般方法,最后对单纯采用DOM和两种方法结合解析XML文档的性能进行了比较。实验结果表明,将SAX和DOM结合使用,在解析大XML文档时,可以极大地提高解析程序的性能。     

用JDOM处理XML文档

JDOM是处理XML的文档一种新型的API接口,本文介绍了JDOM的特点,与DOM和SAX进行了简单的比较,并通过实例说明了如何使用JDOM。     

Information commitments: evaluative standards and information searching strategies in web-based learning environments

Abstract 'Information commitments' include both a set of evaluative standards that Web users utilize to assess the accuracy and usefulness of information in Web-based learning environments (implicit component), and the information searching strategies that Web users use on the Internet (explicit component). An 'Information Commitment Survey' (ICS), consisting of aforementioned components, was developed. The participants of this study were 610 university students, coming from four universities in Taiwan, and their information commitments were surveyed. Through a series of structural equation modelling (SEM) analyses with Linear Structure RELationships (LISREL), this study confirmed the reliability and validity of ICS. More importantly, the causal relationships between the two components of ICS were also examined. The findings showed that learners' evaluative standards on Web materials (implicit component) had significant effects on their information searching strategies in Web-based learning environments (explicit component). For example, learners who utilized an advanced evaluative standard, such as using multiple sources to judge the accuracy of Web materials, were significantly more oriented toward using a sophisticated information searching strategy, such as carefully exploring and elaborating information in Web-based learning environments. In other words, learners' evaluative standards for Web materials should be viewed as important predictors for their searching strategies in Web-based learning environments.     

WebGIS中异构数据源的集成

分析了多源GIS数据融合现状,探讨了WebGIS中异构空间数据源的集成问题,提出了一个以XML和GML为统一的数据表示格式,以SVG形式交互显示矢量地图的WebGIS体系结构。该体系结构既充分利用了现有网络和数据资源,具有良好的可扩展性。     

脚本语言PHP的XML应用支持

探讨脚本语言PHP中对XML的应用支持,分析两种XML解析的PHP实现方式,即应用基于SAX的XML解析器Expat,应用Expand DOM类完成XML解析,表现PHP对XML应用支持的灵活性.     

基于GML的空间数据交换研究

自GML(Geogrphy Markup Language)发布以来，它逐渐被人们接受并正成为一种标准的空间数据交换格式。文中分析了基于GML的空间数据交换模式产生的必然性，继而指出其优点：不仅简化了空间数据交换的程序，能保证转换中的空间数据的完整性，而且是一个易于实现的交换模式，最后，提出了一个实现基于GML3(GML版本3.0)的空间数据交换模式的方法。     

建立基于GML3.0的WEBGIS系统

本文通过分析GIS系统的现状，提出基于Internet的WEBGIS系统从无到有的建立过程，该过程针对GML与SVG的特点，提出建立一种对应GML数据与SVG数据的映射关系i形成XSL样式表，通过XSLT引擎来解释这种关系，将GML数据转化成SVG图形，来解决GIS系统在WEB上发布的问题，同时展示了一个小型的具体实例，并提出了目前存在的问题及解决方向。     

XML编程接口的研究与一个应用模型

描述了XML的特点,分析了DOM和SAX编程接口,研究了DOM和SAX的最佳使用场合,介绍了一种混合SAX和DOM的方法——SAXDOMIX,最后结合DOM和XPath,提出了一种应用模型,并给出了一个简单的例子用以说明。