735,705 research outputs found

    Exploring the academic invisible web

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    Purpose: To provide a critical review of Bergman's 2001 study on the Deep Web. In addition, we bring a new concept into the discussion, the Academic Invisible Web (AIW). We define the Academic Invisible Web as consisting of all databases and collections relevant to academia but not searchable by the general-purpose internet search engines. Indexing this part of the Invisible Web is central to scientific search engines. We provide an overview of approaches followed thus far. Design/methodology/approach: Discussion of measures and calculations, estimation based on informetric laws. Literature review on approaches for uncovering information from the Invisible Web. Findings: Bergman's size estimate of the Invisible Web is highly questionable. We demonstrate some major errors in the conceptual design of the Bergman paper. A new (raw) size estimate is given. Research limitations/implications: The precision of our estimate is limited due to a small sample size and lack of reliable data. Practical implications: We can show that no single library alone will be able to index the Academic Invisible Web. We suggest collaboration to accomplish this task. Originality/value: Provides library managers and those interested in developing academic search engines with data on the size and attributes of the Academic Invisible Web.Comment: 13 pages, 3 figure

    The role of accessibility in a universal web

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    "Universal design" is the process of creating products that are usable by people with the widest possible range of abilities, operating within the widest possible range of situations; whereas "accessibility" primarily refers to design for people with disabilities. While the focus of accessibility is disabilities, research and development in accessibility brings benefits to everyone, particularly users with situational limitations, including device limitations and environmental limitations. Awareness and understanding of the benefits of web accessibility to users without disabilities is growing in some areas with the rapid increase of web-enabled devices such as mobile phones, tablets, televisions, and more; with the increasing focus on the growing number of older web users; and with wider web reach in areas with high incidence of low literacy, low bandwidth, older technology, etc. Although there is significant overlap between designing for accessibility and designing for situational limitations, addressing one set of needs does not necessarily provide sufficient solutions for other needs. Keeping accessibility focused on disabilities encourages research and development on meeting the specific needs of people with disabilities. This communications paper explains the importance of "accessibility" continuing to focus on people with disabilities, while further integrating accessibility with web design, development, and research in other areas, including those covered under universal design and design for all. It also describes how the World Wide Web Consortium (W3C) and Web Accessibility Initiative (WAI) are working to address accessibility and related user needs throughout the technologies of the Web, and invites all interested parties to participate in research and development to further integrate accessibility for people with disabilities in ways that benefit all

    Evaluating the End-User Experience of Private Browsing Mode

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    Nowadays, all major web browsers have a private browsing mode. However, the mode's benefits and limitations are not particularly understood. Through the use of survey studies, prior work has found that most users are either unaware of private browsing or do not use it. Further, those who do use private browsing generally have misconceptions about what protection it provides. However, prior work has not investigated \emph{why} users misunderstand the benefits and limitations of private browsing. In this work, we do so by designing and conducting a three-part study: (1) an analytical approach combining cognitive walkthrough and heuristic evaluation to inspect the user interface of private mode in different browsers; (2) a qualitative, interview-based study to explore users' mental models of private browsing and its security goals; (3) a participatory design study to investigate why existing browser disclosures, the in-browser explanations of private browsing mode, do not communicate the security goals of private browsing to users. Participants critiqued the browser disclosures of three web browsers: Brave, Firefox, and Google Chrome, and then designed new ones. We find that the user interface of private mode in different web browsers violates several well-established design guidelines and heuristics. Further, most participants had incorrect mental models of private browsing, influencing their understanding and usage of private mode. Additionally, we find that existing browser disclosures are not only vague, but also misleading. None of the three studied browser disclosures communicates or explains the primary security goal of private browsing. Drawing from the results of our user study, we extract a set of design recommendations that we encourage browser designers to validate, in order to design more effective and informative browser disclosures related to private mode

    Silicon ribbon study program

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    The feasibility is studied of growing wide, thin silicon dendritic web for solar cell fabrication and conceptual designs are developed for the apparatus required. An analysis of the mechanisms of dendritic web growth indicated that there were no apparent fundamental limitations to the process. The analysis yielded quantitative guidelines for the thermal conditions required for this mode of crystal growth. Crucible designs were then investigated: the usual quartz crucible configurations and configurations in which silicon itself is used for the crucible. The quartz crucible design is feasible and is incorporated into a conceptual design for a laboratory scale crystal growth facility capable of semi-automated quasi-continuous operation

    Enabling Personalized Composition and Adaptive Provisioning of Web Services

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    The proliferation of interconnected computing devices is fostering the emergence of environments where Web services made available to mobile users are a commodity. Unfortunately, inherent limitations of mobile devices still hinder the seamless access to Web services, and their use in supporting complex user activities. In this paper, we describe the design and implementation of a distributed, adaptive, and context-aware framework for personalized service composition and provisioning adapted to mobile users. Users specify their preferences by annotating existing process templates, leading to personalized service-based processes. To cater for the possibility of low bandwidth communication channels and frequent disconnections, an execution model is proposed whereby the responsibility of orchestrating personalized processes is spread across the participating services and user agents. In addition, the execution model is adaptive in the sense that the runtime environment is able to detect exceptions and react to them according to a set of rules

    The power and vulnerability of the ‘new professional’: Web management in UK universities

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    Research paper Purpose: To explore the character of an emergent occupational role, that of university web manager. Design/methodology/approach: The primary data used were 15 semi-structured interviews conducted in 2004. These were analysed partly for factual and attitudinal data, but also for the discursive interpretative repertoires in use. Findings: The paper examines the diverse backgrounds, occupational trajectories, organisational positions, job roles and status of practitioners working in ‘web management’ in UK Higher Education. The discursive divide between the marketing and IT approaches to the web is investigated. Two case studies explore further the complexity and creativity involved in individuals’ construction of coherent and successful occupational identities. Research implications / limitations: The paper examines the position of web managers within the framework of the notions of the marginal but powerful ‘new professional’ or ‘broker’ technician. It gives a vivid insight into how the web as a dynamic and open technology opens up opportunities for new forms of expertise; but also explores the potential vulnerabilities of such new roles. In order to examine personal experience in depth, data was gathered for only a relatively small number of individuals. The research was also limited to the UK university sector and to those with a broad responsibility for the web site of the whole institution, i.e. not library web managers and other web authors who work primarily to produce a departmental web presence. These limits imply obvious ways in which the research could be extended. Practical implications: There are implications for how institutions support people in such roles, and for how they can support each other. Originality: There is a vast literature about the web, little about the new work roles that have grown up around it
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