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Computational Scientists are both creators and end-users of scientific models. Different aspects to their work target different audiences and generally require different development approaches. Here we report outcomes of an experimental collaboration between Software Engineers and Computational Scientists to create a new development environment to encompass diverse end user groups.
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Over the last years, the need to interconnect businesses has significantly affected the Web. The Web has moved constantly from a static source of documents to a dynamic platform for distributed applications. The communication infrastructure of the Web links together applications, e.g. by exposing functionality through Web services in different architectural styles. The current strife between SOA and REST leads one to the issue which approach to choose. Supported by a formal model, we show an integrative way to incorporate service orientation and resource orientation in federated systems as a foundation for future agreements rather than a separation of the approaches.
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Over the last years, the need to interconnect businesses has significantly affected the Web. The Web has moved constantly from a static source of documents to a dynamic platform for distributed applications. The communication infrastructure of the Web links together applications, e.g. by exposing functionality through Web services in different architectural styles. The current strife between SOA and REST leads one to the issue which approach to choose. Supported by a formal model, we show an integrative way to incorporate service orientation and resource orientation in federated systems as a foundation for future agreements rather than a separation of the approaches.
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During the last years, the asset costs for storage have been decreasing continuously. Coincidentally, the demand to create and publish data in the Web has grown in an unprecedented manner. Within the Web 2.0, the user became an active part by creating, publishing, changing and annotating data and its related metadata in a wide variety of new kinds of applications. Many data management but also architectural decisions for such applications are driven by distribution and semantic aspects. In this paper, we present how the WebComposition Data Grid Service (WebComposition/DGS) emerges new kinds of data-centric applications as a REST-architectural style component within the context of Web 2.0 but also satisfies requirements within traditional SOA-based business scenarios.
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For a modern enterprise, it is vital to be on the Web. Beyond offering human-readable Web sites, organizations increasingly use the Web as a media for machine-readable data about itself. With the help of technologies like XML feeds, RESTful Web services and semantic markup, new forms of enterprises models emerge in a bottom-up way. These models are easily consumable and facilitate the interaction with departments, partners and customers. Engineering good publishing systems is however extremely challenging. On the one hand, knowledge of many technologies is required; on the other hand, it must be easy to extend systems and data models in accordance to agile businesses. In this paper, we propose a framework of components for publishing dynamically growing enterprise models on the Web, present an implemented system and discuss its use in a case study.
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Modern software solutions for distributed applications show a strong need for fast and flexible integration of heterogeneous service technologies, as well as for the orchestration of traditional service-based business scenarios (e.g. SOAP or RPC) and REST-driven approaches. The fulfilment of these requirements in existing enterprise platforms is typically accomplished with parallel working components based on different technologies and APIs, resulting in architectural overhead and increased complexity. The WebComposition/DGS (Data Grid Service) aims at solving this issue with the help of a central service layer which specifies a common plug-in framework used to adapt concrete service protocols and which offers an easy-to-use interface for deploying new logic and services. This approach reduces development effort and overall costs thanks to its coherent and integrated DGS-compatible service architecture with automated support for several protocols.
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The need to create, store, maintain, and share data as being part of Web 2.0 labelled solutions requires the application of different skills and tools sets. The growing complexity of these new kinds of applications leads to cost and time-intensive development life-cycle because many data design and management decisions are directly influenced by distribution and semantic aspects. In this paper we propose the Web composition data grid service (Web Composition/DGS) as a supporting service to address these problems. The service acts as a highly integrative core component for data-centric applications, taking traditional SOA-based business scenarios as well as REST-architectural style applications in the Web 2.0 context into account.
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Today’s web applications and their respective business processes reside under the control of different organizations. Establishing federations between these organizations, i.e. bringing these business processes together by transcending organizational and security borders, raises a new class of security questions concerning the management of trust relationships between the autonomous bodies that wish to work together. Based on the WebComposition Architecture Model we provide a modeling approach for federated Web applications. In this paper we present a methodology for formalizing these models using the Ambient Calculus for use in further computation. Based on the results we help the users to identify and detect security related aspects in Web-based federations.
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In the natural sciences, researchers use a variety of techniques that rely on extensive man-hours and can therefore be difficult to scale. This obviously limits questions that concern large spatial scales or that involve large numbers of animals. Here, we describe the design and deployment of a wireless sensor network that delivers high resolution sensor data while monitoring seabirds on a UK National Nature Reserve. We describe some of the problems encountered and the solutions we have used. In general, the network has successfully demonstrated its utility in a real world scenario and will be extended and enhanced for the coming field season.
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Comparing context of different entities is not easy at all. Since context depends on the situation of a particular entity it can be understood in different ways by various entities. In this paper we introduce an approach to consider all entities as environment in which the formal interpretation of all available context and its changes can be quantified and used to find optimal decisions within such an environment-aware system.
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The Internet of Things – Context-based Device Federations
Heil, A., Knoll, M., Weis, T.
Hawaii International Conference on System Science
January 3-6, 2007
Waikoloa, Big Island, Hawaii, USA
Proceedings of the 40^th Annual Hawaii International Conference on System Sciences (HICSS’07)
ISBN 0-7695-2755-8
Pages: 58a
Language: English