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Jankowski J.,Digital Enterprise Research Institute
CEUR Workshop Proceedings | Year: 2012

In this paper we present a guide for writing use cases for the Declarative 3D for the Web Architecture, use cases where embedding 3D data in HTML using declarative approach provides significant benefit. We list components of a use case which we believe are essential when writing use cases and then we walk through a simple use case example. We believe that thanks to properly described use cases, it will be much easier to deduce different required dimensions for the Dec3D specification. Source


Von Der Weth C.,Digital Enterprise Research Institute | Datta A.,Nanyang Technological University
IEEE Internet Computing | Year: 2012

Distributed NoSQL systems aim to provide high availability for large volumes of data but lack the inherent support of complex queries often required by overlying applications. Common solutions based on inverted lists for single terms perform poorly in large-scale distributed settings. The authors thus propose a multiterm indexing technique that can store the inverted lists of combinations of terms. A query-driven mechanism adaptively stores popular term combinations derived from the recent query history. Experiments show that this approach reduces the overall bandwidth consumption by half, significantly improving the NoSQL system's capacity and response time with only marginal overhead in terms of additional, but cheaper, required (storage) resources. © 2006 IEEE. Source


Zhou Z.,China University of Geosciences | Zhou Z.,Orange S.A. | Bhiri S.,Digital Enterprise Research Institute | Zhuge H.,CAS Institute of Computing Technology | Gaaloul W.,Orange S.A.
IEEE Transactions on Systems, Man, and Cybernetics Part A:Systems and Humans | Year: 2012

In recent years, we witness the increasing trend that more applications are developed by composing Web services. Services interact with each other in ways not necessarily foreseen during their development phase. In this setting, mismatches usually exist between services, and adapters are typically synthesized to reconcile mismatches occurring in certain interactions. The technique that identifies the most suitable provider service from a set of functionally equivalent candidates with respect to certain requirements specified by the requester is essential. To address this challenge, we propose a technique called adaptability assessment , which 1) provides a set of conditions that determines when service interactions can be conducted and 2) computes an adaptation degree that specifies to what extent a service protocol is adaptable to another service protocol. Adaptability assessment complements the techniques that synthesize adapters. Specifically, when adaptability assessment suggests that two service protocols can conduct some interactions according to the adaptation mechanisms of a certain adapter and these interactions can fulfill the requester's requirements, then the effort of synthesizing an adapter is beneficial to potential service interactions. As such, the requester can acknowledge whether his/her expected interactions can be conducted or not and under which conditions. This is important before conducting an interaction, particularly when this interaction is critical, long running, and nonrepeatable. © 1996-2012 IEEE. Source


Shukair G.,Digital Enterprise Research Institute | Loutas N.,Digital Enterprise Research Institute | Loutas N.,University of Macedonia | Peristeras V.,ec. | Sklarss S.,Init AG fur Digitale Kommunikation
Computers in Industry | Year: 2013

The divergent interpretations of data, the lack of common metadata and the absence of universal reference data hinder governments from seamless data exchange, information systems integration and the delivery of cross-border public services. To overcome this, governments develop e-Government metadata repositories to store reusable data models, schemata, taxonomies and codelists. We use the term semantic interoperability asset to refer to these types of resources. These repositories however differ in their scope, target group, implementation technologies and end-user interfaces. Although, the semantic content they include can often be reused, even bypass the domain it was originally designed for, their physical isolation and the heterogeneity of the assets' descriptions hamper the reusability of common concepts and cross-repository search. To deal with these challenges, this paper introduces the Asset Description Metadata Schema, an initiative of the ISA programme of the European Commission, which aims to deliver a common metamodel for semantic interoperability assets. © 2012 Elsevier B.V. Source


Hooper C.J.,University of Southampton | Bordea G.,Digital Enterprise Research Institute | Buitelaar P.,Digital Enterprise Research Institute
Proceedings of the 3rd Annual ACM Web Science Conference, WebSci 2013 | Year: 2013

Web Science is an interdisciplinary field. Motivated by the unforeseen scale and impact of the web, it addresses web-related research questions in a holistic manner, incorporating epistemologies from a broad set of disciplines. There has been ongoing discussion about which disciplines are more or less present in the community, and about defining Web Science itself: there is, however, a dearth of empirical work in this area. This paper presents an analysis of the presence of different disciplines in Web Science. We applied Natural Language Processing and topic extraction to a corpus of Web Science material, analysing it with graphing and visualisation tools, MatLab and an expert survey. We discovered four communities within Web Science, and trends in the conference series over time (a strong impact from collocation) and format (posters covering a broader range of topics than papers). The expert survey linked highly ranked terms with disciplines, yielding strong links with Communication, Computer Science, Psychology, and Sociology. Controversially, experts described highly ranked topics and suggested disciplines (extracted from WebSci CFPs) as not reflecting the nature of Web Science. Copyright 2013 ACM. Source

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