A5069103712- Semantic Web and Ontologies
- Service-Oriented Architecture and Web Services
- Data Quality and Management
- Biomedical Text Mining and Ontologies
- Advanced Database Systems and Queries
- Cloud Computing and Resource Management
- Data Mining Algorithms and Applications
- Software System Performance and Reliability
- Scientific Computing and Data Management
- Smart Agriculture and AI
- Multi-Agent Systems and Negotiation
- Business Process Modeling and Analysis
- Logic, Reasoning, and Knowledge
- Bioinformatics and Genomic Networks
- Advanced Graph Neural Networks
- Energy, Environment, and Transportation Policies
- Access Control and Trust
- Food Supply Chain Traceability
- Privacy-Preserving Technologies in Data
- Web Data Mining and Analysis
- Geographic Information Systems Studies
- Natural Language Processing Techniques
- Recommender Systems and Techniques
- Caching and Content Delivery
- Information Technology Governance and Strategy
University of Macedonia
2010-2024
Centre for Research and Technology Hellas
2012-2023
Information Technologies Institute
2018-2023
University of Crete
2007-2012
FORTH Institute of Computer Science
2007-2012
Foundation for Research and Technology Hellas
2007
This paper focuses on the emerging problem of semantic interoperability between heterogeneous cooperating Cloud platforms. We try to pave way towards a Reference Architecture for Semantically Interoperable Clouds (RASIC). To this end, three fundamental and complementary computing paradigms, namely computing, Service Oriented Architectures (SOA) lightweight semantics are used as main building blocks. The open, generic introduces scalable, reusable transferable approach facilitating design,...
The ability to compute the differences that exist between two RDF/S Knowledge Bases (KB) is an important step cope with evolving nature of Semantic Web (SW). In particular, deltas can be employed reduce amount data need exchanged and managed over network in order build SW synchronization versioning services. By considering as sets change operations, this article we introduce various differential functions which take into account inferred knowledge from base. We first study their correctness...
Cloud Platform as a Service (PaaS) is rapidly growing IT paradigm which enables software developers to deploy applications without the burden of platform maintenance.Currently, PaaS market dominated by few providers that promote incompatible standards.This introduces adoption barriers prevent interoperability between heterogeneous offerings, so are not able manage distributed spanning multiple public/private clouds.In this paper we present multi-PaaS application management solution result...
Bioinformatics research relies heavily on the ability to discover and correlate data from various sources. The specialization of life sciences over past decade, coupled with an increasing number biomedical datasets available through standardized interfaces, has created opportunities towards new methods in discovery. Despite popularity semantic web technologies tackling integrative bioinformatics challenge, there are many obstacles its usage by non-technical audiences. In particular, fully...
This paper proposes a collaborative methodology for developing semantic data models. The proposed the model development follows “meet-in-the-middle” approach. On one hand, concepts emerged in bottom-up fashion from analyzing domain and interviewing experts regarding their needs. other it followed top-down approach whereby existing ontologies, vocabularies models were analyzed integrated with model. identified elements then fed to multiphase abstraction exercise order get of derived is also...
A major part of Open Data concerns statistics such as economic and social indicators. Statistical data are structured in a multidimensional manner creating cubes. Recently, National Institutes public authorities adopted the Linked paradigm to publish their statistical on Web. Many vocabularies have been created enable modeling cubes RDF graphs, thus (LOSD). However, creation LOSD remains demanding task mainly because challenges related either conceptual definition cube, or way linked data....
In a continuously evolving environment, organizations, including public administrations, need to quickly adapt change and make decisions in real-time. This requires having real-time understanding of their context that can be achieved by adopting an event-native mindset data management which focuses on the dynamics compared state-based traditional approaches. this context, paper proposes adoption event-centric knowledge graph approach for holistic all repositories administration. Towards...
Cloud Platform as a Service (PaaS) is novel paradigm that enables software developers to create (develop or integrate), deploy, execute, and manage business applications, using service provided by third party. The diversity heterogeneity of the existing PaaS offerings raises several interoperability challenges. actual market still quite young, chaotic highly fragmented, dominated few providers which use promote incompatible standards formats. This introduces adoption barriers due lock-in...
The provision of public services (PS) is at the heart authority operations as it directly affects citizens’ lives and prosperity society. Part PS publishing descriptions in an online catalogue to inform citizens promote transparency. European Commission has developed Core Public Service Vocabulary Application Profile (CPSV-AP), a standard data model facilitate creation semantic interoperability. However, CPSV-AP not sufficient complex with different versions based on rules circumstances...
Public administrations (PA) around the globe produce and handle vast amounts of data that are mainly outcome interactions limited types core-entities (e.g., citizens, businesses). Usually, information involving core entities scattered in numerous siloed databases developed by different departments divisions, thus hindering PAs from providing a comprehensive view their interactions. One type entity with prominent role within PA involved many temporal appointments, assignments) is "public...
Public administrations (PA) around the globe produce and handle a vast amount of data that are mainly outcome interactions end-users. By evaluating focus PA one finds most involve only few core entities such as citizen or business. Usually, this information involving scattered in numerous siloed databases developed by different departments divisions, thus hindering to provide comprehensive overview their interactions. Recently, knowledge graphs have been proposed for structuring large...
The provision of public services is at the heart authorities operations as it directly affects citizens' lives and prosperity society a whole. opening promotes transparency could potentially facilitate participation in co-creation. can be fostered by using service model for structuring descriptions. Additionally, use standard also semantic interoperability between catalogues or eGovernment information systems. European Commission has developed core vocabulary, namely Core Public Service...
A major part of Open Data concerns statistics such as economic and social indicators. Statistical data are structured in a multidimensional manner creating cubes. Recently, National Institutes public authorities adopted the Linked paradigm to publish their statistical on Web. Many vocabularies have been created enable modeling cubes RDF graphs, thus (LOSD). However, creation LOSD remains demanding task mainly because challenges related either conceptual definition cube, or way linked data....