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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.


Scerri S.,Digital Enterprise Research Institute
Communications in Computer and Information Science | Year: 2013

Digital means of communications such as email and IM have become a crucial tool for collaboration. Taking advantage of the fact that information exchanged over these media can be made persistent, a lot of research has strived to make sense of the ongoing communication processes in order to support the participants with their management. In this Chapter we pursue a workflow-oriented approach to demonstrate how, coupled with appropriate information extraction techniques, robust knowledge models and intuitive user interfaces; semantic technology can provide support for email-based collaborative work. While eliciting as much knowledge as possible, our design concept imposes little to no changes, and/or restrictions, to the conventional use of email. © 2013 Springer-Verlag Berlin Heidelberg.


Gao F.,Digital Enterprise Research Institute | Bhiri S.,Digital Enterprise Research Institute
UBICOMM 2012 - 6th International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies | Year: 2012

Current complex event processing systems are often implemented as standalone engines that produce business events and feed process execution environments. Event patterns are defined with rule-based languages. Logical programming and/or stream processing techniques are used to detect matchings for the patterns. However, tremendous technical efforts are required both for the pattern definition and implementation. In this paper, we present a novel framework that provides a user-centric way to define complex event patterns and implement the patterns automatically. We allow the business users to describe their complex events with graphical notations and transform the graphical pattern into a stream query, then, we evaluate the query over primitive sensor data streams to obtain results as complex events.


Bosch T.,GESIS Leibniz Institute for Social science | Cyganiak R.,Digital Enterprise Research Institute | Wackerow J.,GESIS Leibniz Institute for Social science | Zapilko B.,GESIS Leibniz Institute for Social science
Proceedings of the International Conference on Dublin Core and Metadata Applications | Year: 2012

Experts from the statistical domain worked in close collaboration with ontology engineers to develop an ontology of a subset of the Data Documentation Initiative, an established international standard for the documentation and management of data from the social, behavioral, and economic sciences. Experts in the statistics domain formulated use cases which are seen as most significant to solve frequent problems. Various benefits for the Linked Data and the statistics community as well are connected with an RDF representation of the developed ontology. In the main part of the paper, the DDI conceptual model as well as implementations are explained in detail.


Fox R.,Digital Enterprise Research Institute | Cooley J.,Digital Enterprise Research Institute | Hauswirth M.,Digital Enterprise Research Institute
IEEE Internet Computing | Year: 2011

In the telehealth domain, caregiver networks provide support to the patient in the community, often through a personal health record (PHR). Current PHR systems typically are used where data and services are delivered through a single integrated data store that limits choice, is a fixed solution, and forces providers to conform to a specific data interface. Sqwelch is a mashup maker that enables trusted collaboration between a caregiver network's members through a virtual, distributed PHR. Sqwelch provides an intuitive means for the caregiver network to create personalized mashups, while the patient retains privacy control through trust specifications. © 2011 IEEE.


Freitas A.,Digital Enterprise Research Institute | Curry E.,Digital Enterprise Research Institute | Oliveira J.G.,Digital Enterprise Research Institute | O'Riain S.,Digital Enterprise Research Institute
IEEE Internet Computing | Year: 2012

The growing number of datasets published on the Web as linked data brings both opportunities for high data availability and challenges inherent to querying data in a semantically heterogeneous and distributed environment. Approaches used for querying siloed databases fail at Web-scale because users don't have an a priori understanding of all the available datasets. This article investigates the main challenges in constructing a query and search solution for linked data and analyzes existing approaches and trends. © 2006 IEEE.


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.


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.


Chan J.,Digital Enterprise Research Institute | Daly E.M.,Digital Enterprise Research Institute | Hayes C.,IBM
ICWSM 2010 - Proceedings of the 4th International AAAI Conference on Weblogs and Social Media | Year: 2010

Discussion forums are a central part of Web 2.0 and Enterprise 2.0 infrastructures. The health and sustainability of forums is dependent on the information exchange behaviour of its contributors, which is expressed through online conversation. The increasing popularity and importance of forums requires a better understanding and characterisation of communication behaviour so that forums can be better managed, new services delivered and opportunities and risks detected. In this paper, we present an empirical analysis of user communication roles in a medium-sized bulletin board and we analyse the composition of several forums in terms of these roles, demonstrating similarities between forums based on underlying user behaviour rather than topic. Copyright © 2010, Association for the Advancement of Artificial Intelligence (www.aaai.org). All rights reserved.


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.

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