32,164 research outputs found
Recommended from our members
Knowledge modelling for integrating semantic web services in e-government applications
Service integration and domain interoperability are
the basic requirements in the development of current
service-oriented e-Government applications. Semantic
Web and, in particular, Semantic Web Service (SWS)
technology aim to address these issues. However, the integration between e-Government applications and SWS is not an easy task. We argue that a more complex semantic layer needs to be modeled. The aim of our work is to provide an ontological framework that maps such a semantic layer. In this paper, we describe our approach for creating a project-independent and reusable model, and provide a case study that demonstrates its applicability
Media do not exist : performativity and mediating conjunctures
Collection : Theory on demand ; 31Media Do Not Exist: Performativity and Mediating Conjunctures by Jean-Marc Larrue and Marcello Vitali-Rosati offers a radically new approach to the phenomenon of mediation, proposing a new understanding that challenges the very notion of medium. It begins with a historical overview of recent developments in Western thought on mediation, especially since the mid 80s and the emergence of the disciplines of media archaeology and intermediality. While these developments are inseparable from the advent of digital technology, they have a long history. The authors trace the roots of this thought back to the dawn of philosophy.
Humans interact with their environment â which includes other humans â not through media, but rather through a series of continually evolving mediations, which Larrue and Vitali-Rosati call âmediating conjuncturesâ. This observation leads them to the paradoxical argument that âmedia do not existâ. Existing theories of mediation processes remain largely influenced by a traditional understanding of media as relatively stable entities. Media Do Not Exist demonstrates the limits of this conception. The dynamics relating to mediation are the product not of a single medium, but rather of a series of mediating conjunctures. They are created by ceaselessly shifting events and interactions, blending the human and the non-human, energy, and matter
Recommended from our members
Benefits and challenges of applying Semantic Web Services in the e-Government domain
Joining up services in e-Government usually implies governmental agencies acting in concert without a central control regime. This requires the sharing of scattered and heterogeneous data. Semantic Web Service (SWS) technology can help to integrate, mediate and reason between these datasets. However, since few real-world applications have been developed, it is still unclear which are the actual benefits and issues of adopting such a technology in the e-Government domain. In this paper, we contribute to raising awareness of the potential benefits in the e-Government community by analyzing motivations, requirements, and expected results, before proposing a reusable SWS-based framework. We demonstrate the application of this framework by a compelling use case: a GIS-based emergency planning system. We illustrate the obtained benefits and the key challenges which remain to be addressed
Recommended from our members
Two-fold Semantic Web service matchmaking â applying ontology mapping for service discovery
Semantic Web Services (SWS) aim at the automated discovery and orchestration of Web services on the basis of comprehensive, machine-interpretable semantic descriptions. Since SWS annotations usually are created by distinct SWS providers, semantic-level mediation, i.e. mediation between concurrent semantic representations, is a key requirement for SWS discovery. Since semantic-level mediation aims at enabling interoperability across heterogeneous semantic representations, it can be perceived as a particular instantiation of the ontology mapping problem. While recent SWS matchmakers usually rely on manual alignments or subscription to a common ontology, we propose a two-fold SWS matchmaking approach, consisting of (a) a general-purpose semantic-level mediator and (b) comparison and matchmaking of SWS capabilities. Our semantic-level mediation approach enables the implicit representation of similarities across distinct SWS by grounding service descriptions in so-called Mediation Spaces (MS). Given a set of SWS and their respective grounding, a SWS matchmaker automatically computes instance similarities across distinct SWS ontologies and matches the request to the most suitable SWS. A prototypical application illustrates our approach
Context-Aware Information Retrieval for Enhanced Situation Awareness
In the coalition forces, users are increasingly challenged with the issues of information overload and correlation of information from heterogeneous sources. Users might need different pieces of information, ranging from information about a single building, to the resolution strategy of a global conflict. Sometimes, the time, location and past history of information access can also shape the information needs of users. Information systems need to help users pull together data from disparate sources according to their expressed needs (as represented by system queries), as well as less specific criteria. Information consumers have varying roles, tasks/missions, goals and agendas, knowledge and background, and personal preferences. These factors can be used to shape both the execution of user queries and the form in which retrieved information is packaged. However, full automation of this daunting information aggregation and customization task is not possible with existing approaches. In this paper we present an infrastructure for context-aware information retrieval to enhance situation awareness. The infrastructure provides each user with a customized, mission-oriented system that gives access to the right information from heterogeneous sources in the context of a particular task, plan and/or mission. The approach lays on five intertwined fundamental concepts, namely Workflow, Context, Ontology, Profile and Information Aggregation. The exploitation of this knowledge, using appropriate domain ontologies, will make it feasible to provide contextual assistance in various ways to the work performed according to a userâs taskrelevant information requirements. This paper formalizes these concepts and their interrelationships
Visualization in cyber-geography: reconsidering cartography's concept of visualization in current usercentric cybergeographic cosmologies
This article discusses some epistemological problems of a semiotic and cybernetic
character in two current scientific cosmologies in the study of geographic
information systems (GIS) with special reference to the concept of visualization in
modern cartography.
Setting off from Michael Battyâs prolegomena for a virtual geography and Michael
Goodchildâs âHuman-Computer-Reality-Interactionâ as the field of a new media
convergence and networking of GIS-computation of geo-data, the paper outlines
preliminarily a common field of study, namely that of cybernetic geography, or just
âcyber-geography) owing to the principal similarities with second order cybernetics.
Relating these geographical cosmologies to some of Scienceâs dominant, historical
perceptions of the exploring and appropriating of Nature as an âinventory of
knowledgeâ, the article seeks to identify some basic ontological and epistemological
dimensions of cybernetic geography and visualization in modern cartography.
The points made is that a generalized notion of visualization understood as the use of
maps, or more precisely as cybergeographic GIS-thinking seems necessary as an
epistemological as well as a methodological prerequisite to scientific knowledge in
cybergeography. Moreover do these generalized concept seem to lead to a
displacement of the positions traditionally held by the scientist and lay-man citizen,
that is not only in respect of the perception of the matter studied, i.e. the field of
geography, but also of the manner in which the scientist informs the lay-man citizen
in the course of action in the public participation in decision making; a displacement
that seems to lead to a more critical, or perhaps even quasi-scientific approach as
concerns the lay-man user
IRS II: a framework and infrastructure for semantic web services
In this paper we describe IRSâII (Internet Reasoning Service) a framework and implemented infrastructure, whose main goal is to support the publication, location, composition and execution of heterogeneous web services, augmented with semantic descriptions of their functionalities. IRSâII has three main classes of features which distinguish it from other work on semantic web services. Firstly, it supports one-click publishing of standalone software: IRSâII automatically creates the appropriate wrappers, given pointers to the standalone code. Secondly, it explicitly distinguishes between tasks (what to do) and methods (how to achieve tasks) and as a result supports capability-driven service invocation; flexible mappings between services and problem specifications; and dynamic, knowledge-based service selection. Finally, IRSâII services are web service compatible â standard web services can be trivially published through the IRSâII and any IRSâII service automatically appears as a standard web service to other web service infrastructures. In the paper we illustrate the main functionalities of IRSâII through a scenario involving a distributed application in the healthcare domain
A schema-based P2P network to enable publish-subscribe for multimedia content in open hypermedia systems
Open Hypermedia Systems (OHS) aim to provide efficient dissemination, adaptation and integration of hyperlinked multimedia resources. Content available in Peer-to-Peer (P2P) networks could add significant value to OHS provided that challenges for efficient discovery and prompt delivery of rich and up-to-date content are successfully addressed. This paper proposes an architecture that enables the operation of OHS over a P2P overlay network of OHS servers based on semantic annotation of (a) peer OHS servers and of (b) multimedia resources that can be obtained through the link services of the OHS. The architecture provides efficient resource discovery. Semantic query-based subscriptions over this P2P network can enable access to up-to-date content, while caching at certain peers enables prompt delivery of multimedia content. Advanced query resolution techniques are employed to match different parts of subscription queries (subqueries). These subscriptions can be shared among different interested peers, thus increasing the efficiency of multimedia content dissemination
- âŠ