- Service-Oriented Architecture and Web Services
- Business Process Modeling and Analysis
- Advanced Software Engineering Methodologies
- Information Technology Governance and Strategy
- IoT and Edge/Fog Computing
- Simulation Techniques and Applications
- Software System Performance and Reliability
- Cloud Computing and Resource Management
- Systems Engineering Methodologies and Applications
- Context-Aware Activity Recognition Systems
- Semantic Web and Ontologies
- E-Government and Public Services
- Flexible and Reconfigurable Manufacturing Systems
- Blockchain Technology Applications and Security
- Collaboration in agile enterprises
- Knowledge Management and Sharing
- Advanced Data Storage Technologies
- Advanced Database Systems and Queries
- Real-time simulation and control systems
- Big Data and Business Intelligence
- Open Source Software Innovations
- Scientific Computing and Data Management
- Auction Theory and Applications
- Modeling and Simulation Systems
- Internet Traffic Analysis and Secure E-voting
Harokopio University of Athens
2016-2025
National and Kapodistrian University of Athens
2007-2024
Institute of Electrical and Electronics Engineers
2013
Walker (United States)
2013
Athens State University
2002-2003
The use of Cardiovascular Disease (CVD) risk estimation scores in primary prevention has long been established. However, their performance still remains a matter concern. aim this study was to explore the potential using ML methodologies on CVD prediction, especially compared established tool, HellenicSCORE. Data from ATTICA prospective (n = 2020 adults), enrolled during 2001–02 and followed-up 2011–12 were used. Three different machine-learning classifiers (k-NN, random forest, decision...
The paper presents an integrated approach for automated semantic web service composition using AI planning techniques. An important advantage of this is that the process, as well discovery atomic services take part in composition, are significantly facilitated by incorporation information. OWL-S descriptions transformed into a problem described standardized fashion PDDL, while information used enhancement process approximating optimal composite when exact solutions not found. Solving,...
System models are constructed to design, study, and understand complex systems. According the systems modeling language (SysML) that is a standard for model-based system engineering, all engineering activities should be performed using common model. To validate defined in SysML, simulation usually employed. There numerous efforts simulate SysML different methods tools. However, efficient support of automated generation executable code still an issue tangled by research community. This paper...
With the usage of technologies like Internet Things and Cloud, spanning across spectrum manufacturing, production distribution, typical supply chain management (SCM) systems rely on a multitude services for support. The aim this paper is to present an integrated system microservice architecture implementation, consuming semantically annotating data feeds from online systems, while performing post-processing tasks such as monitoring, goods location analysis estimated delays. Suitable...
The achievement of organizational interoperability is a crucial factor for the successful digital transformation and catalyst Digital Decade's 2030 main targets. aim this paper to develop test new conceptual model assessment. A model, assess in an effective, holistic way services has been developed, using mixed qualitative quantitative approach, based on literature research feedback from experts field, composing valid effective evaluating interoperability. developed consists 9 factors 34...
Systems Modeling Language (SysML) is used to define hierarchical system models in model-based engineering (MBE). Although SysML may effectively serve the description of complex systems, it can not support all activities. For example, validation usually performed via simulation. In this case, should be transformed domain-specific models, e.g. executable simulation suitable for specific tools. This paper identifies key issues efficient model simulation, utilizing Model Driven Architecture...
Web service discovery on the web is not a trivial task as number of available descriptions continuously increases, and global UDDI registries are no longer available. As through conventional, general-purpose search engines does yield satisfactory results, more promising alternative should be explored specialized engines. This paper explores design implementation such framework, resulting in WESS, engine targeted to discovering retrieving descriptions. The presented system features an...
Information and Communication Technologies (ICT) rapidly migrate towards the Future Internet era, which is characterised, among others, by powerful complex network infrastructures innovative applications, services content. An application area that attracts immense research interest transportation. In particular, traffic congestions, emergencies accidents reveal inefficiencies in transportation infrastructures, can be overcome through exploitation of ICT findings, designing systems are...
Discrete event simulation specification (DEVS) is a formalism facilitating hierarchical and modular description of the models executed using DEVS simulators. Lack standardized, easy-to-use interface enabling practitioners to define their an important drawback, since in most cases are defined as C++ or Java programs based on existing simulator-specific libraries. Standard MDA concepts can be applied for construction different programming environments. DEVSML, platform-independent, XML-based...
SysML language, proposed by OMG, is a commonly accepted standard to model and study systems-of-systems (SoS). It provides the means depict SoS components their behavior in multi-layer fashion explore alterative architectures for design. To validate models terms of performance criteria, simulation usually preferred method employed. this end, different diagrams are utilized, while numerous methodologies tools There many efforts targeting code generation from models. Model-based system...
Lately, Internet-based solutions, brought by the Internet of Things (IoT) and cloud computation storage technologies, have been driving revolutionary approaches in innumerable domains, including sensitive domain healthcare. Indicatively, real-time diagnosis medical issues, telemedicine, remote monitoring patients, as well computer-assisted smart transportation case emergencies, are anticipated Systems-of-Systems (SoS) that can execute several applications different criticality, thus...
For business processes we consider agility to be the capability modify and adjust them in face of unexpected contingencies even during execution phase. Traditional process-centric approaches dictate action sequence definition within context a specific process designed cover organisations requirements at some former point time. To address phenomenon that fail match newly evolved organisational needs propose an event-centric approach identifying meaningful events drive execution. We actions as...
Internet-based solutions, enhanced by Internet of Things (IoT) and Cloud computing, are constantly driving revolutionary approaches in multiple domains, including healthcare. Indicatively, telemedicine, real-time diagnosis remote monitoring patients, expected to transform the healthcare domain. These systems may offer several services different criticality, necessitating safety-/mission-critical core components non-critical peripheral components; other words, they complex, mixed-criticality...
The last decade a great number of digital library and repository systems have been developed published as open-source software. variety available software is factor confusion when an organization planning to build infrastructure host its collections. To simplify the decision process five widely used are compared, namely DSpace, Fedora, Greenstone, EPrints Invenio. In addition comparison these their characteristics' description, authors propose most suitable for different cases Using...
Systems Modeling Language (SysML) is an object management group standard for systems-of-systems engineering. It enables the description of complex system models; however, it cannot effectively support all engineering activities. For instance, performance evaluation usually performed via simulation. In this case, transformation SysML models to executable simulation specific methodologies and tools required. Model a key component addressing challenges seamless integration model in model-based...
Model-driven system design is facilitated by SysML language, which provides distinct diagrams to describe structure and components, explore allocation policies identify requirements. While non-functional requirements play a significant role in design, their are not effectively supported SysML. This paper emphasizes on extension facilitate the effective description verification of quantitative The introduction diagram evaluation results enhances requirement capabilities, while visualization...