Research in constraint-based layout, visualization, CAD, and related topics : a bibliographical survey

The present work compiles numerous papers in the area of computer-aided design, graphics, layout configuration, and user interfaces in general. There is nearly no conference on graphics, multimedia, and user interfaces that does not include a section on constraint-based graphics; on the other hand most conferences on constraint processing favour applications in graphics. This work of bibliographical pointers may serve as a basis for a detailed and comprehensive survey of this important and challenging field in the intersection of constraint processing and graphics. In order to reach this ambitious aim, and also to keep this study up-to-date, the authors appreciate any comment and update information

Identifying critical success factors of ERP systems at the higher education sector

In response to a range of contextual drivers, the worldwide adoption of ERP Systems in Higher Education Institutions (HEIs) has increased substantially over the past decade. Though the difficulties and high failure rate in implementing ERP systems at university environments have been cited in the literature, research on critical success factors (CSFs) for ERP implementations in this context is rare and fragmented. This paper is part of a larger research effort that aims to contribute to understanding the phenomenon of ERP implementations and evaluations in HEIs in the Australasian region; it identifies, previously reported, critical success factors (CSFs) in relation to ERP system implementations and discusses the importance of these factors

Teaching programming with computational and informational thinking

Computers are the dominant technology of the early 21st century: pretty well all aspects of economic, social and personal life are now unthinkable without them. In turn, computer hardware is controlled by software, that is, codes written in programming languages. Programming, the construction of software, is thus a fundamental activity, in which millions of people are engaged worldwide, and the teaching of programming is long established in international secondary and higher education. Yet, going on 70 years after the first computers were built, there is no well-established pedagogy for teaching programming. There has certainly been no shortage of approaches. However, these have often been driven by fashion, an enthusiastic amateurism or a wish to follow best industrial practice, which, while appropriate for mature professionals, is poorly suited to novice programmers. Much of the difficulty lies in the very close relationship between problem solving and programming. Once a problem is well characterised it is relatively straightforward to realise a solution in software. However, teaching problem solving is, if anything, less well understood than teaching programming. Problem solving seems to be a creative, holistic, dialectical, multi-dimensional, iterative process. While there are well established techniques for analysing problems, arbitrary problems cannot be solved by rote, by mechanically applying techniques in some prescribed linear order. Furthermore, historically, approaches to teaching programming have failed to account for this complexity in problem solving, focusing strongly on programming itself and, if at all, only partially and superficially exploring problem solving. Recently, an integrated approach to problem solving and programming called Computational Thinking (CT) (Wing, 2006) has gained considerable currency. CT has the enormous advantage over prior approaches of strongly emphasising problem solving and of making explicit core techniques. Nonetheless, there is still a tendency to view CT as prescriptive rather than creative, engendering scholastic arguments about the nature and status of CT techniques. Programming at heart is concerned with processing information but many accounts of CT emphasise processing over information rather than seeing then as intimately related. In this paper, while acknowledging and building on the strengths of CT, I argue that understanding the form and structure of information should be primary in any pedagogy of programming

An Empirical Investigation of the Relationship between Information Quality and Individual Impact in Organizations

The aim of this research is to confirm that information quality impacts individual work, considering external variables that may influence knowledge workers perception of information quality and individual impact. This research is descriptive and the constructs used are known and previously validated. However, the research model, that includes external variables that may influence the relationship between perceived information quality and individual impact, has never been proposed nor validated by other researchers. The research unit is the individual that work in organizations and use at least one information system to do his/her job. A survey using self employed electronic questionnaire was applied to one large organization that operates in Paraná State, Brazil. Structural Equation Modeling was used to analyze the data. The results confirmed the positive influence of information quality on individual impacts and pointed out external variables that influence these perceived variables

Systematizing Decentralization and Privacy: Lessons from 15 Years of Research and Deployments

Decentralized systems are a subset of distributed systems where multiple authorities control different components and no authority is fully trusted by all. This implies that any component in a decentralized system is potentially adversarial. We revise fifteen years of research on decentralization and privacy, and provide an overview of key systems, as well as key insights for designers of future systems. We show that decentralized designs can enhance privacy, integrity, and availability but also require careful trade-offs in terms of system complexity, properties provided, and degree of decentralization. These trade-offs need to be understood and navigated by designers. We argue that a combination of insights from cryptography, distributed systems, and mechanism design, aligned with the development of adequate incentives, are necessary to build scalable and successful privacy-preserving decentralized systems

Digital Piracy of MP3s: Consumer and Ethical Predispositions

Purpose – Illegal downloading of music has become an inexorable and rampant activity particularly among college students who have been little deterred by industry legal actions. The purpose of this research is to examine the present state of downloading and how ethical orientation and attitudes towards MP3 piracy impact such activities. The paper also aims to use ethical scenarios as a way of understanding the ethical reasoning in illegal downloading. Design/methodology/approach – Key research questions are proposed that are related to illegal downloading. A sample of 364 university students was used to examine each research question. Statistical results are reported. Findings – The results clearly show that downloading continues at a high rate today driven by a strong belief that it is not ethically wrong. Ethical orientation was found to be positively associated with awareness of the social cost of downloading, consequences of downloading, and ethical belief in downloading. Ethical scenarios show that ethical orientation is also associated with downloading activities and with stealing. Other results indicate that respondents believe that their peers are more prone to stealing music and downloading MP3s illegally. Fear of consequences does seem to have an impact on the propensity to download illegally. Practical implications – The paper contributes to inform industry representatives that appeals to ethics or guilt are not likely to deter illegal downloading measurably. The use of punishment for downloaders may have a short-term effect but other (more positive) measures are required. Originality/value – No research has examined downloading of MP3s in the manner developed in this paper. The paper contributes to a better understanding of consumer behavior among those who download. The results provide insight into a serious problem in the recording industry that is likely to persist in the distant future unless sound measures are developed

Web Site Analysis: A Review and Assessment of Previous Research

The emergence of the World Wide Web as a major communication and transaction channel stresses the preeminent importance of a company\u27s Web site for representing the organization, interacting with customers and conducting transactions. In comparison to other channels, the opportunities for targeting specific market segments are somehow limited, due to the Internet\u27s worldwide reach and predominantly anonymous users. Additionally, an ever-increasing number of customers are going online, which prevents the fine tuning of a site for specific user groups. Therefore, it seems essential that organizations possessing Web presence should be well aware of their site\u27s general functionality and how it is perceived by Internet users. For many years the analysis of Web sites has been one of the major topics for both scholars and practitioners, which led to a huge number of different techniques being used for the evaluation of sites. Furthermore, a variety of different theories and models have been developed which include the effects of Web sites as dependent or independent variables. In this paper, I compare different approaches to Web site analysis and present a classification framework. Numerous examples will be given to illustrate the various dimensions of the framework. Furthermore, benefits and drawbacks of the respective methods will be discussed where applicable. The results provide important insights into the current state of the art of Web analysis and will be supportive for anyone planning to conduct a Web analysis as well as for someone who is interested in getting an overview of the research field

Towards an aspect weaving BPEL engine

This position paper proposes the use of dynamic aspects and the visitor design pattern to obtain a highly configurable and extensible BPEL engine. Using these two techniques, the core of this infrastructural software can be customised to meet new requirements and add features such as debugging, execution monitoring, or changing to another Web Service selection policy. Additionally, it can easily be extended to cope with customer-specific BPEL extensions. We propose the use of dynamic aspects not only on the engine itself but also on the workflow in order to tackle the problems of Web Service hot deployment and hot fixes to long running processes. In this way, composing aWeb Service "on-the-fly" means weaving its choreography interface into the workflow

Applying inspection to object-oriented software

The benefits of the object-oriented paradigmare widely cited. At the same time, inspection is deemed to be the most cost-effective means of detecting defects in software products. Why then, is there no published experience, let alone quantitative data, on the application of inspection to object-oriented systems? We describe the facilities of the object-oriented paradigm and the issues that these raise when inspecting object-oriented code. Several problems are caused by the disparity between the static code structure and its dynamic runtime behaviour. The large number of small methods in object-oriented systems can also cause problems. We then go on to describe three areas which may help mitigate problems found. Firstly, the use of various programming methods may assist in making object-oriented code easier to inspect. Secondly, improved program documentation can help the inspector understand the code which is under inspection. Finally, tool support can help the inspector to analyse the dynamic behaviour of the code. We conclude that while both the object-oriented paradigm and inspection provide excellent benefits on their own, combining the two may be a difficult exercise, requiring extensive support if it is to be successful