As the number of Web users and the diversity of Web applications continues to explode, Web Quality of Service (QoS) is an increasingly critical issue in the domain of e-Commerce [re]. This paper presents experiments designed to estimate users' tolerance of QoS in the context of e-commerce. In addition to objective measures we discuss contextual factors that influence these thresholds and show how users' conceptual models of Web tasks affect their expectations. We then show how user thresholds of tolerance can be taken into account when designing web servers. This integration of user requirements for QoS into systems design is ultimately of benefit to all stakeholders in the design of Internet services.

... makes Quality of Service (QoS) increasingly critical [15]. To date, the majority of research on QoS is systems oriented, focusing on traffic analysis, scheduling, and routing. Relatively minor attention has been paid to user-level QoS issues. It is not yet known how objective system quality relates to users' subjective perceptions of quality. This paper presents the results of quantitative experiments that establish a mapping between objective and perceived QoS in the context of Internet commerce. We also conducted focus groups to determine how contextual factors influence users' perceptions of QoS. We show that, while users' perceptions of World Wide Web QoS are influenced by a number of contextual factors, it is possible to correlate objective measures of QoS with subjective judgements made by users, and therefore influence system design. We argue that only by integrating users' requirements for QoS into system design can the utility of the future Internet be maximized.

Design critiquing systems are a type of intelligent user interface used to support human designers in decision making. This paper places design critics in the larger context of intelligent user interface approaches and surveys several critiquing systems. Each approach and system is evaluated with respect to a five-phase design improvement process. This paper concludes with a summary of the state of the art in critiquing systems and recommendations for future research directions. 1.

Software architectures are high-level design representations of software systems that focus on composition of software components and how those components interact. Software architectures abstract the details of implementation and allow the designer to focus on essential design decisions. Regardless of notation, designers are faced with the task of making good design decisions that demand a broad range of knowledge of the problem and solution domains. In this paper we describe Argo, a software architecture design environment that supports designers by addressing several cognitive challenges of design. Argo’s critiquing infrastructure supports decision making by automatically supplying knowledge that is timely and relevant to decisions at hand. Our discussion centers on a fivephase critiquing process that we use to motivate Argo’s features, structure a usage scenario, and characterize related work. Keywords: Domain-oriented design environments, software architecture, human cognitive needs, design critics 1.

Although there is much practical interest in Web advertising as a component of marketing on the Internet, there is little theory or evidence about how it works in the context of Web content. This paper reports a laboratory experiment that examines the impact of advertising format (less or more intrusive), medium (print or Web) and Web content structure (linear or non-linear) on a broad range of measures of advertising effectiveness and evaluation of Web content. Several hypotheses based on human information processing considerations are developed and tested. The results show that advertising effectiveness is constant across advertising formats, media, and Web content structures. Evaluation of content was found to be unaffected by medium or Web content structure, but positive related to the presence of advertising, and negatively associated with the level of intrusiveness of advertising format.

With the rapid globalization of companies, also the globalization of software development has become a reality. Many software projects are now distributed in diverse sites across the globe. The distance between these sites creates several problems that did not exist for the co-located teams. Problems in the coordination of the activities, as well as in the communication between team members emerge. This paper presents the most important problems in global software development, as well as the techniques and tools designed to solve these problems. Key Words: Global Software Development, Distributed Software Development, Cooperative Software Development. 1

This paper covers the issues of using weak, US government-approved security as well as problems with flawed security measures, examines some of the measures necessary to provide an adequate level of security, and then suggests several possible solutions. This paper is targeted at people with a responsibility for computer security as well as those currently considering the extent to which their organisation may wish to become involved in Internet commerce, and includes fairly extensive coverage of past and present Internet commerce related security problems in order to given a general idea of areas to look out for. Although little security knowledge is assumed, some sections are intended for more technically-aware readers and may be skipped if desired. Problems in Internet-Based Electronic Commerce The creation of a global electronic commerce system will provide an extremely powerful magnet for hackers, criminals, disgruntled employees, and hostile (but also "friendly") governments' intelligence agencies. This problem is magnified by the nature of the Internet, which allows attackers to quickly disseminate technical details on performing attacks and software to exploit vulnerabilities. A single skilled attacker willing to share their knowledge can enable hordes of dilettantes around the world to exploit a security hole in an operating system or application software within a matter of hours [Gordon 1994]. One example of how easy these tools make it for neophytes to attack a system involved someone gaining super-user privileges on a Unix system and then trying to execute DOS commands. The Internet also enables an attacker to perform attacks over long distances with little chance of detection and even less chance of apprehension. The ability to carry this out more or less ...

interest are Marketing and E-Commerce, especially Internet marketing and E-CRM. The main objective of this study is to review the development and adoption of Internet and ICT in Malaysia. The adoption of ICT already introduced in Malaysia in 1960s. Refer to 21st century, number of studies shows that development and adoption of Internet and ICT in Malaysia is among the highest in the ASEAN countries.