150 research outputs found

    XML Interfaces to the Internet of Things

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    The internet of things is predicated on tiny, cheap, lower power computers being embedded in devices everywhere. However such tiny devices by definition have very little memory and computing power available to support user interfaces or extended servers, and so the user interface needs to be distributed over the network. This paper describes techniques using standard technologies based on XML for creating remote user interfaces for the Internet of Thing

    SMIL State: an architecture and implementation for adaptive time-based web applications

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    In this paper we examine adaptive time-based web applications (or presentations). These are interactive presentations where time dictates which parts of the application are presented (providing the major structuring paradigm), and that require interactivity and other dynamic adaptation. We investigate the current technologies available to create such presentations and their shortcomings, and suggest a mechanism for addressing these shortcomings. This mechanism, SMIL State, can be used to add user-defined state to declarative time-based languages such as SMIL or SVG animation, thereby enabling the author to create control flows that are difficult to realize within the temporal containment model of the host languages. In addition, SMIL State can be used as a bridging mechanism between languages, enabling easy integration of external components into the web application. Finally, SMIL State enables richer expressions for content control. This paper defines SMIL State in terms of an introductory example, followed by a detailed specification of the State model. Next, the implementation of this model is discussed. We conclude with a set of potential use cases, including dynamic content adaptation and delayed insertion of custom content such as advertisements. © 2009 Springer Science+Business Media, LLC

    Flexible Access Control, Federated Identity and Heterogeneous Metadata Supports for Repositories

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    In this paper, we present a new framework complete with implementation, for a digital repository that will address some of the most difficult issues facing repository managers today: how to enable federated identity access, rapidly changing access control requirements, and the management of multiple metadata standards for different types of digital objects. Our work draws together leading industry standards in the area of authentication, authorization, and metadata management, and apply them in a new and innovative way to the repository landscape. As a demonstration, we apply our work to a speech annotation research project which makes use of a repository to manage its culturally sensitive data

    Revista Economica

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    Adding state to declarative languages to enable web applications

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    On the web, media tend to be encoded in declarative formats, which facilitate accessibility, reuse, and transformation. Web applications, on the other hand, are created with more procedural technology and do not enjoy these benefits. In this thesis we examine how this can be fixed. We examine a small part of the problem space, adaptive time based applications, and investigate how we can extend existing declarative languages to fa

    Mukautuvat XML-pohjaiset multimediapalvelut

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    The emergence of mobile computing requires new kinds of technologies for building services. HTML has been traditionally used to describe documents on the Internet, but it can no longer fulfil these new demands. New mobile devices are compact and limited in respect of processing power, screen size and navigation. Content has to be separated from the layout for the services to be accessible from various computing environments and devices. Web standards are already moving towards XML technology. The flexibility of these new XML-related standards makes it possible to create new kind of platform independent services. However, some of the standards are relatively new and haven't really been tested in practice, not to mention how well they work together. An interactive multimedia service was built to demonstrate some of the new standards. This demonstration service features XML, XSL, ECMAScript and XForms standards. Evaluation of the service showed that all the used standards work smoothly together. Adaptive multimedia services can be created using these technologies. However, the downside at the moment is the lack of proper tools. Especially XSL FO and XForms are very complicated and require a lot of studying. Before powerful and easy-to-use tools are available, developing services can be quite troublesome.Langattoman viestinnän yleistyminen vaatii uudenlaisia tekniikoita palvelujen rakentamiseen. HTML:ää on perinteisesti käytetty dokumenttien kuvauskielenä internetissä, mutta se ei enää pysty tyydyttämään uudenlaisia vaatimuksia. Uudet langattomat päätelaitteet ovat pienikokoisia ja niillä on rajallisesti prosessointitehoa sekä tavallisesta työasemasta poikkeavia navigointitapoja. Sisältö ja ulkoasu täytyy pystyä erottamaan toisistaan, jotta palveluja voitaisiin käyttää erilaisissa laiteympäristöissä. WWW-standardit ovat jo nyt siirtymässä kohti XML-yhteensopivia tekniikoita, mahdollistaa uudentyyppisten laiteriippumattomien palvelujen rakentamisen. Jotkut näistä standardeista ovat kuitenkin varsin tuoreita eikä niitä ole käytännössä. Niiden yhteensopivuudestakaan ei ole vielä paljon kokemuksia. Uusien tekniikoiden arvioimiseksi rakennettiin interaktiivinen multimediapalvelu, jossa on käytetty XML, XSL, ECMAScript ja XForms standardeja. Palvelun arviointi näytti, että käytetyt tekniikat toimivat hyvin yhdessä. Näitä tekniikoita käyttämällä voidaan rakentaa mukautuvia multimediapalveluja. Huonoksi puoleksi havaittiin se, että sopivia työkaluja ei vielä ole. Erityisesti XSL FO ja XForms ovat varsin monimutkaisia ja vaativat paljon perehtymistä. Palvelujen rakentaminen voi olla melko työlästä ennen kuin tehokkaita ja helppokäyttöisiä työkaluja on saatavilla

    Content Accessibility of Web documents. Principles and Recommendations

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    The paper is an overview of issues related to the accessibility of Web sites, of European initiatives and recommendations in the field, of future solutions, such as developing Web 2.0 accessible applications with WAI-ARIA. As part of the Pro-Inclusiv project was included a set of accessibility recommendations to design web sites, recommendations presented in the paper.Web accessibility, users with disabilities, standards and recommendations

    Orchestrating Metadata Enhancement Services: Introducing Lenny

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    Harvested metadata often suffers from uneven quality to the point that utility is compromised. Although some aggregators have developed methods for evaluating and repairing specific metadata problems, it has been unclear how these methods might be scaled into services that can be used within an automated production environment. The National Science Digital Library (NSDL), as part of its work with INFOMINE, has developed a model of ser-vice interaction that enables loosely-coupled third party services to provide metadata enhancements to a central repository, with interactions orchestrated by a centralized software application

    Evaluation of IVR data collection UIs for untrained rural users

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    Due to the rapid spread of mobile phones and coverage in the developing world, mobile phones are being increasingly used as a technology platform for developing-world applications including data collection. In order to reach the vast majority of mobile phone users without access to specialized software, applications must make use of interactive voice response (IVR) UIs. However, it is unclear whether rural users in the developing world can use such UIs without prior training or IVR experience; and if so, what UI design choices improve usability for these target populations. This paper presents the results of a real-world deployment of an IVR application for collecting feedback from teachers in rural Uganda. Automated IVR data collection calls were delivered to over 150 teachers over a period of several months. Modifications were made to the IVR interface throughout the study period in response to user interviews and recorded transcripts of survey calls. Significant differences in task success rate were observed for different interface designs (from 0% to over 75% success). Notably, most participants were not able to use a touchtone or touchtone-voice hybrid interface without prior training. A set of design recommendations is proposed based on the performance of several tested interface designs
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