@conference {826,
	title = {EnQuest: A Cloud Datalake Infrastructure for Heterogeneous Analytics in Maritime and Tourism Domains},
	booktitle = {DATA 2023 (demo)},
	year = {2023},
	abstract = {<p>Within recent years, transportation and supply chain have been affected by an avalanche of data including IoT devices, online services, social media and others. However, the implemented solutions so far are fragmented, physically distributed, require specialized IT knowledge to deploy, and involve significant IT experience to operate even for trivial tasks. In the context of the ENIRISST+ project, we developed EnQuest1, an online data lake that allows users without any IT background to harvest, store, organize, analyze and share heterogeneous, multi-faceted maritime/tourism data. EnQuest provides a zero-administration, zero-cost, integrated framework that enables scientists, practitioners and other stakeholders within the above domains to easily: (i) deploy data acquisition services (crawlers, dataset imports, questionnaire forms), (ii) design and manage versatile customizable data stores, (iii) share whole datasets or horizontal/vertical data shards with other stakeholders, (iv) search, filter and analyze data via an expressive yet simple-to-use graphical query engine and visualization tools, and (v) perform user management and access control operations on the stored data. To the best of our knowledge, this is the first approach in the literature that targets users without an IT background and focuses on collecting, managing, analyzing, and sharing diverse, multi-faceted data in maritime the and tourism sectors. The main goals of the proposed demonstration are to showcase the EnQuest system to the conference participants and promote the work of the ENIRISST+ project consortium. During the demo we will (i) deploy social media crawlers to gather maritime data and show the participants how to process and visualise them, (ii) create live questionnaires using the EnQuest functionality, ask the participants to fill them in and demonstrate the live processed data on appropriate dashboards, and (iii) demonstrate how to import data and subscribe to data flows of other users through the implemented publish/subscribe module. For the needs of the demo we will only require internet connection and a desk; we will have our own laptops to use at the demonstration.</p>
},
	keywords = {big data, cloud systems, data analytics, datalakes, maritime, tourism},
	author = {Kimon Deligiannis and Christos Tryfonopoulos and Paraskevi Raftopoulou and Nikos Platis and Costas Vassilakis}
}
@inbook {796,
	title = {Handbook of Research on Developing a Post-Pandemic Paradigm for Virtual Technologies in Higher Education},
	year = {2021},
	publisher = {IGI Global},
	organization = {IGI Global},
	chapter = {Social Skills and Online Learning},
	abstract = {<p>The concept of online teaching and learning is widely adopted by universities due to the pandemic of COVID-19, which forced them to shift from blending learning (including both direct and remote education) to exclusive online education. Technology has provided a multitude of tools which can prove very useful in the hands of people who want to serve such a great purpose as education. During the days of the pandemic, where people are isolated, virtual community and virtual learning technology brings people together to experience a sense of educational community in the virtual world. This chapter introduces the reader to the importance for social skill training of the learning communities during times that online learning is the sole type of education, exploring methodologies, tools and practices that can be used to counterbalance the deficiencies introduced by distance learning methods regarding social skill development.</p>
},
	keywords = {Active learning, Community of Inquiry, COVID-19, Digital Collaboration Platforms, Higher Education, Pandemic, Problem-Based Learning, Remote Learning, Social skills, Virtual Learning Community},
	author = {Kriemadis, Athanasios and Kapnisi, Dimitra and Vassilakis, Costas and Spiliotopoulos Dimitris}
}
@article {772,
	title = {Hydria: An Online Data Lake for Multi-Faceted Analytics in the Cultural Heritage Domain},
	journal = {Big Data and Cognitive Computing},
	volume = {4},
	year = {2020},
	pages = {7},
	abstract = {Advancements in cultural informatics have significantly influenced the way we perceive, analyze, communicate and understand culture. New data sources, such as social media, digitized cultural content, and Internet of Things (IoT) devices, have allowed us to enrich and customize the cultural experience, but at the same time have created an avalanche of new data that needs to be stored and appropriately managed in order to be of value. Although data management plays a central role in driving forward the cultural heritage domain, the solutions applied so far are fragmented, physically distributed, require specialized IT knowledge to deploy, and entail significant IT experience to operate even for trivial tasks. In this work, we present Hydria, an online data lake that allows users without any IT background to harvest, store, organize, analyze and share heterogeneous, multi-faceted cultural heritage data. Hydria provides a zero-administration, zero-cost, integrated framework that enables researchers, museum curators and other stakeholders within the cultural heritage domain to easily (i) deploy data acquisition services (like social media scrapers, focused web crawlers, dataset imports, questionnaire forms), (ii) design and manage versatile customizable data stores, (iii) share whole datasets or horizontal/vertical data shards with other stakeholders, (iv) search, filter and analyze data via an expressive yet simple-to-use graphical query engine and visualization tools, and (v) perform user management and access control operations on the stored data. To the best of our knowledge, this is the first solution in the literature that focuses on collecting, managing, analyzing, and sharing diverse, multi-faceted data in the cultural heritage domain and targets users without an IT background.},
	keywords = {analytics and visualization, big data management, Cultural heritage, data lake, data store, open source},
	doi = {10.3390/bdcc4020007},
	url = {https://www.mdpi.com/2504-2289/4/2/7},
	author = {Kimon Deligiannis and Paraskevi Raftopoulou and Christos Tryfonopoulos and Nikos Platis and Costas Vassilakis}
}
@article {715,
	title = {Bringing a peripheral, traditional venue to the digital era with targeted narratives},
	journal = {Digital Applications in Archaeology and Cultural Heritage},
	volume = {14},
	year = {2019},
	month = {sep},
	pages = {e00111},
	abstract = {The current work presents a method of enhancing museum content with narratives targeting history reflection in a personalized manner, delivered by an especially designed mobile app. The mobile app is a part of a technology ecosystem that supports the visitor before, during and after her visit. Within the framework of the European H2020 CrossCult project, a method was designed, implemented and tested to enhance museum content with digital material, enriched narratives and means to actively engage visitors. In particular, the method was implemented and tested for the content of the Archaeological Museum of Tripolis (Greece) and specific content examples are presented here, together with data from visitor evaluation. The results showed that content was significantly and qualitatively enhanced and visitors recognized the potential of the app in triggering visitor curiosity, new forms of engagement, and the ability to reflect on the connections between historical and social phenomena.},
	keywords = {Cultural heritage, Museum app, Narratives, reflection, Visitor experience},
	doi = {10.1016/j.daach.2019.e00111},
	url = {https://www.sciencedirect.com/science/article/pii/S2212054819300098},
	author = {Angeliki Antoniou and Susana Reboreda Morillo and George Lepouras and Jason Diakoumakos and Costas Vassilakis and Martin Lopez Nores and Catherine Emma Jones}
}
@conference {725,
	title = {Kalamata 1821: Roads of Freedom - Digital applications teach history (Greek title: Καλαμάτα 1821: Δρόμοι Ελευθερίας {\textendash} Οι ψηφιακές εφαρμογές διδάσκουν ιστορία)},
	booktitle = {2nd Panhellenic conference on Open Educational Resources and e-learning},
	year = {2019},
	abstract = {The {\textquotedblleft}Kalamata 1821: Roads of Freedom{\textquotedblright} project is an effort for scientifically organizing the celebration of the 200-year anniversary from the liberation of Greece from the Turkish thrall, with a special focus on the city of Kalamata. The project, aiming to link historical memories to the modern era, includes a major section related to the development of digital applications. The project{\textquoteright}s digital applications are developed by the Knowledge and Uncertainty lab of the Department of Informatics and Telecommunications of the University of the Peloponnese. The digital applications are based on the information provided by the historical scientific team of the project. Within the project, two distinct groups of applications are developed, in order to cover the diverse needs of the target population. The nature of the applications is clearly didactic, offering detailed information regarding historical facts, places and persons which relate to the Greek War of Independence, as well as on locations where important events took place. The Interactive Table applications are a group of applications which will be available to the public visiting the historic building of the old Town Hall of Kalamata, where the project exhibition center is located. These applications constitute a modern, interactive, digital encyclopedia of the relation between the city of Kalamata and the Greek War of Independence. For the Interactive Table, three original applications were developed. The first depicts histories and facts linked to some points on a map. The second presents a tree of histories, that is histories that are interrelated, and where each visitor may familiarize with facts and persons that are linked to each other. Finally, the third application focuses on images and multimedia, challenging the visitors to identify and elaborate on events and histories hiding behind pictures. The second group consists of a single application that targets on a wider public that prefers a different type on interaction. Effectively this application implements a scavenger hunt with historic content. The goal of this application is to motivate the visitor of the city of Kalamata to wander around the city, and also to link the project to the local market.},
	keywords = {Educational applications, Interactive table, Mobile applications},
	author = {M. Wallace and V. Poulopoulos and A. Antoniou and C. Vassilakis and G. Lepouras and J. Diakoumakos and V. Panagiotidou}
}
@proceedings {590,
	title = {SciTo trends: visualising scientific topic trends},
	year = {2019},
	month = {September},
	author = {Serafeim Chatzopoulos and Panagiotis Deligiannis and Thanasis Vergoulis and Ilias Kanellos and Christos Tryfonopoulos and Theodore Dalamagas}
}
@article {DBLP:journals/bmcbi/ZagganasVPVSD17,
	title = {BUFET: boosting the unbiased miRNA functional enrichment analysis using bitsets},
	journal = {BMC Bioinformatics},
	volume = {18},
	number = {1},
	year = {2017},
	pages = {399:1{\textendash}399:8},
	doi = {10.1186/s12859-017-1812-8},
	url = {https://doi.org/10.1186/s12859-017-1812-8},
	author = {Konstantinos Zagganas and Thanasis Vergoulis and Maria D. Paraskevopoulou and Ioannis S. Vlachos and Spiros Skiadopoulos and Theodore Dalamagas}
}
@proceedings {DBLP:conf/esws/2016,
	title = {The Semantic Web. Latest Advances and New Domains - 13th International Conference, ESWC 2016, Heraklion, Crete, Greece, May 29 - June 2, 2016, Proceedings},
	volume = {9678},
	year = {2016},
	publisher = {Springer},
	isbn = {978-3-319-34128-6},
	doi = {10.1007/978-3-319-34129-3},
	url = {https://doi.org/10.1007/978-3-319-34129-3},
	editor = {Harald Sack and Eva Blomqvist and Mathieu d{\textquoteright}Aquin and Chiara Ghidini and Simone Paolo Ponzetto and Christoph Lange}
}
@proceedings {DBLP:conf/icdm/2013w,
	title = {13th IEEE International Conference on Data Mining Workshops, ICDM Workshops, TX, USA, December 7-10, 2013},
	year = {2013},
	publisher = {IEEE Computer Society},
	isbn = {978-0-7695-5109-8},
	url = {http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6732242},
	editor = {Wei Ding and Takashi Washio and Hui Xiong and George Karypis and Bhavani M. Thuraisingham and Diane J. Cook and Xindong Wu}
}
@article {DBLP:journals/tkde/BourosSDSS12,
	title = {Evaluating Path Queries over Frequently Updated Route Collections},
	journal = {IEEE Trans. Knowl. Data Eng.},
	volume = {24},
	number = {7},
	year = {2012},
	pages = {1276{\textendash}1290},
	doi = {10.1109/TKDE.2011.30},
	url = {https://doi.org/10.1109/TKDE.2011.30},
	author = {Panagiotis Bouros and Dimitris Sacharidis and Theodore Dalamagas and Spiros Skiadopoulos and Timos K. Sellis}
}
@article {lyk11a,
	title = {Wikis in enterprise settings: a survey},
	journal = {Enterprise Information Systems},
	volume = {6},
	number = {1},
	year = {2012},
	month = {feb},
	pages = {1-53},
	publisher = {Informa UK Limited},
	abstract = {The wiki technology is increasingly being used in corporate environments to facilitate a broad range of tasks. This survey examines the use of wikis on a variety of organisational tasks that include the codification of explicit and tacit organisational knowledge and the formulation of corporate communities of practice, as well as more specific processes such as the collaborative information systems development, the interactions of the enterprise with third parties, management activities and organisational response in crisis situations. For each one of the aforementioned corporate functions, the study examines the findings of related research literature to highlight the advantages and concerns raised by the wiki usage and to identify specific solutions addressing them. Finally, based on the above findings, the study discusses various aspects of the wiki usage in the enterprise and identifies trends and future research directions on the field.},
	doi = {10.1080/17517575.2011.580008},
	url = {http://dx.doi.org/10.1080/17517575.2011.580008},
	author = {Ioanna Lykourentzou and Foteini Dagka and Katerina Papadaki and Giorgos Lepouras and Costas Vassilakis}
}
@conference {Akim2011a,
	title = {Spreading Activation for Web Scale Reasoning: Promise and Problems},
	booktitle = {WebSci 11, poster presentation},
	year = {2011},
	month = {6},
	pages = {1-4},
	abstract = {Various forms of spreading activation has been used in a number of web systems, not least in the PageRank algorithm. In our own work we have been using this as a technique for managing context over small and large ontologies, and both our own work and that in LarKC suggests that spreading activation has the potential to aid in reasoning over web-scale data sets including the growing set of linked open data resources. Of particular importance is that spreading activation can be applied locally to a dynamic selfselecting working set of an (practically) unbound linked data collection, as well as globally to the entire collection. However, this potential does not come without problems, some concerning the nature of the algorithm on any large data set, and some more to do with the particular nature of linked open data.},
	author = {Nazihah Md. Akim and Alan Dix and Akrivi Katifori and Giorgos Lepouras and Nadeem Shabir and Costas Vassilakis}
}
@article {antoniou11,
	title = {Towards a methodological framework for the cognitive-behavioural evaluation of educational e-games},
	journal = {International Journal of Learning Technology},
	volume = {6},
	number = {3},
	year = {2011},
	pages = {263{\textendash}287},
	abstract = {The proposed methodological framework reviews and uses knowledge from the field of cognitive psychology in order to evaluate aspects of educational games. In particular, we concentrate on two components of human cognition that play a central role to learning, namely memory and motivation. After having reviewed theories in the field, we created a questionnaire in order to evaluate educational games. The questionnaire incorporates different experimental findings of cognitive psychology. Especially, we have applied Maslow{\textquoteright}s motivation theory, Behavioural findings on reinforcement, experimental findings about attention and memory. We present the results obtained from the evaluation of two games, PAC-MAN and Mega Jump. The results confirmed the user ratings of the two games, showing that there seem to be cognitive reasons for the success/failure of different games. Finally, lists of guidelines for developers and instructors are included.},
	doi = {10.1504/11.43580},
	author = {Angela Antoniou and Dimitris Diakakis and Giorgos Lepouras and Costas Vassilakis}
}
@article {dix2010b,
	title = {From the web of data to a world of action},
	journal = {Journal of Web Semantics},
	volume = {8 issue 4},
	year = {2010},
	pages = {394-408},
	abstract = {This paper takes as its premise that the web is a place of action, not just information, and that the purpose of global data is to serve human needs. The paper presents several component technologies, which together work towards a vision where many small micro-applications can be threaded together using automated assistance to enable a unified and rich interaction. These technologies include data detector technology to enable any text to become a start point of semantic interaction; annotations for web-based services so that they can link data to potential actions; spreading activation over personal ontologies, to allow modelling of context; algorithms for automatically inferring {\textquoteleft}typing{\textquoteright} of web-form input data based on previous user inputs; and early work on inferring task structures from action traces. Some of these have already been integrated within an experimental web-based (extended) bookmarking tool, Snip!t, and a prototype desktop application On Time, and the paper discusses how the components could be more fully, yet more openly, linked in terms of both architecture and interaction. As well as contributing to the goal of an action and activity-focused web, the work also exposes a number of broader issues, theoretical, practical, social and economic, for the Semantic Web.},
	doi = {10.1016/j.websem.2010.04.007},
	author = {Alan Dix and Giorgos Lepouras and Akrivi Katifori and Costas Vassilakis and Tiziana Catarci and Antonella Poggi and Yannis Ioannidis and Miguel Morae and I. Daradimos and Nazihah Md.Akima and Shah Rukh Humayound and Fabio Terella}
}
@article {Katifori10a,
	title = {Ontologies and the brain: Using spreading activation through ontologies to support personal interaction},
	journal = {Cognitive Systems Research},
	volume = {Volume 11, Issue 1},
	year = {2010},
	note = {cited By (since 1996) 0; Article in Press},
	pages = {25-41},
	abstract = {Ontologies, as knowledge engineering tools, allow information to be modelled in ways resembling to those used by the human brain, and may be very useful in the context of personal information management (PIM) and task information management (TIM). This work proposes the use of ontologies as a long-term knowledge store for PIM-related information, and the use of spreading activation over ontologies in order to provide context inference to tools that support TIM. Details on the ontology creation and content are provided, along with a full description of the spreading activation algorithm and its preliminary evaluation. Β{\textcopyright} 2009 Elsevier B.V.},
	doi = {10.1016/j.cogsys.2009.02.001},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-62249112875\&partnerID=40\&md5=7d25fb986738b4c71a627b3fec24c58d},
	author = {Akrivi Katifori and Costas Vassilakis and Alan Dix}
}
@article {dix2010,
	title = {Spreading Activation Over Ontologies: From Personal Context To Web Scale Reasoning},
	journal = {International Journal of Semantic Computing},
	volume = {Special issue on Web Scale Reasoning},
	year = {2010},
	pages = {59{\textendash}102},
	abstract = {This paper describes methods to allow spreading activation to be used on web-scale information resources. Existing work has shown that spreading activation can be used to model context over small personal ontologies, which can be used to assist in various user activities, for example, in autocompleting web forms. This previous work is extended and methods are developed by which large external repositories, including corporate information and the web, can be linked to the user?s personal ontology and thus allow automated assistance that is able to draw on the entire web of data. The basic idea is augment the personal ontology with cached data from external repositories, where the choice of what data to fetch or discard is related to the level of activation of entities already in the personal ontology or cached data. This relies on the assumption that the working set of highly active entities is relatively small; empirical results are presented, which suggest these assumptions are likely to hold. Implications of the techniques are discussed for user interaction and for the social web. In addition, warm world reasoning is proposed, applying rule-based reasoning over activate entities, potentially merging symbolic and sub-symbolic reasoning over web-scale knowledge bases.},
	doi = {10.1142/S1793351X10000973},
	author = {Alan Dix and Akrivi Katifori and Giorgos Lepouras and Costas Vassilakis and Nadeem Shabir}
}
@conference {DBLP:conf/ssdbm/BourosSDSS09,
	title = {Evaluating Reachability Queries over Path Collections},
	booktitle = {Scientific and Statistical Database Management, 21st International Conference, SSDBM 2009, New Orleans, LA, USA, June 2-4, 2009, Proceedings},
	year = {2009},
	pages = {398{\textendash}416},
	doi = {10.1007/978-3-642-02279-1_29},
	url = {https://doi.org/10.1007/978-3-642-02279-1_29},
	author = {Panagiotis Bouros and Spiros Skiadopoulos and Theodore Dalamagas and Dimitris Sacharidis and Timos K. Sellis}
}
@article {583,
	title = {Information Filtering and Query Indexing for an Information Retrieval Model},
	journal = {ACM Transactions on Information Systems (TOIS)},
	volume = {27},
	year = {2009},
	pages = {1{\textendash}47},
	author = {Christos Tryfonopoulos and Manolis Koubarakis and Yannis Drougas}
}
@conference {daradim2008,
	title = {A Drupal CMS Module for Managing Museum Collections},
	booktitle = {International Symposium on Information \& communication technologies in cultural heritage},
	year = {2008},
	month = {10},
	abstract = {Digitization efforts and web presentations are currently on-going in many museums, archives, libraries and culture heritage institutions in general, exploiting the advent of WWW and digitization technologies. The main benefits from these efforts are exhibit cataloguing, their effective management, preservation and showcasing, and their presentation to the public through the WWW. However, many museums, especially the smaller ones, cannot afford a commercial product and resort to using simple static web pages for their web presence and exhibit presentation. Content Management Systems (CMS), especially open-source ones which come with practically zero-cost, are more and more frequently adopted by museums to create and maintain their website, since they simplify the creation and editing of the web pages and may be used by non-computer experts. In this work we present a module for the Drupal CMS, which provides functionality for (a) Database schema extension to accommodate museum exhibit and collection information (b) Digital exhibit representation (DER) management. (c) Provision of administration pages through which the museum personnel may enter and manage exhibit and collection information (d) WWW scowcasing and (e) Batch data import/export, to facilitate information exchange with other museums.},
	author = {I. Daradimos and Costas Vassilakis and Akrivi Katifori}
}
@article {vas2008d,
	title = {An Integrated Environment for Cataloguing and Online Presentation of Museum Exhibits},
	journal = {DESIDOC Journal of Library and Information Technology},
	volume = {28(4)},
	year = {2008},
	pages = {72-78},
	abstract = {The paper presents an integrated environment which enables museum personnel to catalogue and at the same time publish online museum exhibits. The system is based on international standards and is highly customisable to cater the needs of a variety of museum types. Moreover, the underlying database allows storing for the same exhibit documentations for different audiences and in multiple languages, while it is extendable to accommodate new media types, languages, exhibits and information categories. The administrative part of the environment permits the restriction of certain functions to specific personnel roles, enforcing thus a general museum security policy regarding access to and modification of information. The environment presented is currently in use at the Athens University History Museum.},
	author = {Costas Vassilakis and Akrivi Katifori and I. Daradimos and Giorgos Lepouras}
}
@conference {Golemati2008106,
	title = {An interview-based user study on the use of visualizations for folder browsing},
	booktitle = {Proceedings of the International Conference on Information Visualisation},
	year = {2008},
	note = {cited By (since 1996) 0},
	month = {7},
	pages = {106-112},
	abstract = {Hierarchically structured data collections often need to be visualized for the purposes of digital information management and presentation. File browsing, in particular, has an inherent hierarchical structure and plays an important role in the context of Personal Information Management (PIM). A multitude of file browsers are nowadays available, offering different functionalities, while users adopt diverse practices and habits for browsing activities. In this paper, we investigate these aspects to obtain insights into their advantages and disadvantages and suggest solutions in the area of PIM, as well as in other domains employing similar visualization paradigms. The presented study focuses on the two most widespread visualizations used by file browsers, the indented list and zoomable interface paradigms, and assesses their effectiveness for various tasks and contexts, both by exploiting results on existing evaluations on hierarchy visualizations and folder hierarchy visualizations in particular, and by conducting an interviewbased user study. Β{\textcopyright} 2008 IEEE.},
	keywords = {Administrative data processing, File browser visualization, Indented list visualization, Information analysis, Information management, Information science, Intermodulation, Intermodulation measurement, International conferences, Management, Management information systems, Telecommunication services, User study, Windows explorer},
	doi = {10.1109/IV.2008.90},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-51749097531\&partnerID=40\&md5=66afc30e74191773d1c950ac83ba9ac7},
	author = {M. Golemati and Akrivi Katifori and E.G. Giannopoulou and I. Daradimos and Costas Vassilakis and Giorgos Lepouras and C. Halatsis}
}
@conference {Katifori2008a1,
	title = {Personal Ontology Creation and Visualization for a Personal Interaction Management System},
	booktitle = {Proceedings of PIM, CHI 2008},
	year = {2008},
	month = {4},
	abstract = {Ontologies offer a flexible and expressive layer of abstraction, very useful for capturing the semantics of information repositories and facilitating their retrieval either by the user or by the system to support user tasks. This work presents an ontology-based user profiler, in the context of a Personal Interaction Management System (PIMS). The profiler, based on an ontology of the users? domain, enables them to create their personal ontology by initially choosing one of the available template ontologies as a starting point, which they subsequently populate and customize. The profiler employs a web interface which allows users to populate their personal ontology through forms, hiding ontology complexities and peculiarities. Forms are dynamically generated through ontology views, which are specified by ontology designers.},
	author = {Akrivi Katifori and Costas Vassilakis and I. Daradimos and Giorgos Lepouras and Yannis Ioannidis and Alan Dix and Antonella Poggi and Tiziana Catarci}
}
@conference {katifori2008b,
	title = {Using Spreading Activation through Ontologies to Support Personal Information Management},
	booktitle = {Proceedings of CSKGOI, within IUI 2008},
	year = {2008},
	month = {1},
	abstract = {Recent research in the domain of Personal Information Management has recognized the need for a paradigm shift towards a more activity-oriented system. Ontologies, as semantic networks with a structure not dissimilar to the one used by the human brain for storing long-term knowledge, may be very useful as the basis of such a system. This work proposes the use of spreading activation over ontologies in order to provide to a task-based system and its associated tools with methods to record semantics related to documents and tasks and to support user context inference.},
	url = {http://ceur-ws.org/Vol-323/paper05.pdf},
	author = {Akrivi Katifori and Costas Vassilakis and Alan Dix}
}
@conference {Daradimos2008141,
	title = {WhereRU: GPS position reporting and a personal ontology as a virtual community utility},
	booktitle = {Proceedings of the 2nd International Conference on Research Challenges in Information Science, RCIS 2008},
	year = {2008},
	note = {cited By (since 1996) 0},
	month = {6},
	pages = {141-146},
	abstract = {The recent progress of the World Wide Web has created new needs for information sharing in virtual communities. WhereRU is a multiuser GPS position reporting system that allows users to make their location publicly available as well as associate it with information on places, persons and events that may later also serve as reminders of the their experiences when traveling.},
	keywords = {Communication, Global positioning system, Gps positions, Information science, Information sharing, Internet, Multiuser, Ontology, Personal ontologies, Position reporting, Recent progresses, Reporting systems, Satellite navigation aids, Virtual communities, Virtual reality, Web community, World Wide Web},
	doi = {10.1109/RCIS.2008.4632102},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-57349094004\&partnerID=40\&md5=4eaed4757acf5c4da8b292275b92a73a},
	author = {I. Daradimos and Akrivi Katifori and Costas Vassilakis}
}
@conference {Golemati200793,
	title = {Evaluating the significance of the windows explorer visualization in personal information management browsing tasks},
	booktitle = {Proceedings of the International Conference on Information Visualisation},
	year = {2007},
	note = {cited By (since 1996) 0},
	month = {7},
	pages = {93-98},
	abstract = {The visualization of hierarchies is very important for digital information management and presentation systems. Especially in the context of Personal Information Management, file browsers play a very important role. Currently the most common file browser visualizations are Windows Explorer and the simple zoomable visualization offered by Microsoft Windows. This work explores the issue of file browser visualization through a user study based on inter-views and an experiment. Β{\textcopyright} 2007 IEEE.},
	keywords = {Data reduction, File browser visualization, Hierarchical systems, Indented list visualization, Information analysis, User study, Web browsers, Windows explorer},
	doi = {10.1109/IV.2007.46},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-35348919670\&partnerID=40\&md5=f35f306d4063ee2e91e3c573f4ed5d8a},
	author = {M. Golemati and Akrivi Katifori and E.G. Giannopoulou and I. Daradimos and Costas Vassilakis}
}
@conference {KatiforiVTLHD07,
	title = {Historical Archive Ontologies Requirements, Modeling and Visualization},
	booktitle = {RCIS},
	year = {2007},
	month = {4},
	pages = {401-406},
	abstract = {Most ontology development methodologies and tools for ontology management deal with ontology snapshots, i.e. they model and manage only the most recent version of ontologies, which is inadequate for contexts where the history of the ontology is of interest, such as historical archives. This work presents a set of requirements for the modeling and visualization of a temporal ontology used as a tool for the representation of historical information. In accordance to these requirements, a visualization plug-in was designed and implemented, featuring a set of tools that enable users to efficiently examine ontology temporal characteristics such as class and instance evolution along the timeline.},
	author = {Akrivi Katifori and Costas Vassilakis and Elena Torou and Giorgos Lepouras and C. Halatsis and I. Daradimos}
}
@proceedings {DBLP:conf/icde/2007,
	title = {Proceedings of the 23rd International Conference on Data Engineering, ICDE 2007, The Marmara Hotel, Istanbul, Turkey, April 15-20, 2007},
	year = {2007},
	publisher = {IEEE Computer Society},
	isbn = {1-4244-0802-4},
	url = {http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=4221634},
	editor = {Rada Chirkova and Asuman Dogac and M. Tamer {\"O}zsu and Timos K. Sellis}
}
@conference {1133365,
	title = {Visualizing a temporally-enhanced ontology},
	booktitle = {AVI {\textquoteright}06: Proceedings of the working conference on Advanced visual interfaces},
	year = {2006},
	month = {5},
	pages = {488{\textendash}491},
	publisher = {ACM},
	organization = {ACM},
	address = {New York, NY, USA},
	abstract = {Most ontology development methodologies and tools for ontology management deal with ontology snapshots, i.e. they model and manage only the most recent version of ontologies, which is inadequate for contexts where the history of the ontology is of interest, such as historical archives. This work presents a modeling for entity and relationship timelines in the Prot.g. tool, complemented with a visualization plug-in, which enables users to examine entity evolution along the timeline.},
	isbn = {1-59593-353-0},
	doi = {10.1145/1133265.1133365},
	author = {Akrivi Katifori and Costas Vassilakis and Giorgos Lepouras and I. Daradimos and C. Halatsis}
}
@proceedings {DBLP:conf/er/2005,
	title = {Conceptual Modeling - ER 2005, 24th International Conference on Conceptual Modeling, Klagenfurt, Austria, October 24-28, 2005, Proceedings},
	volume = {3716},
	year = {2005},
	publisher = {Springer},
	isbn = {3-540-29389-2},
	doi = {10.1007/11568322},
	url = {https://doi.org/10.1007/11568322},
	editor = {Lois M. L. Delcambre and Christian Kop and Heinrich C. Mayr and John Mylopoulos and Oscar Pastor}
}
@conference {567,
	title = {Query Processing in Super-Peer Networks with Languages Based on Information Retrieval: the P2P-DIET Approach},
	booktitle = {Proceedings of the International Workshop on Peer-to-peer Computing and Databases (P2P\&DB @ EDBT)},
	year = {2004},
	month = {March},
	address = {Herakion, Greece},
	author = {Stratos Idreos and Christos Tryfonopoulos and Manolis Koubarakis and Yannis Drougas}
}
@article {577,
	title = {Selective Information Dissemination in P2P Networks: Problems and Solutions},
	journal = {SIGMOD Record, Special Issue on Peer-to-Peer Data Management},
	volume = {32},
	year = {2003},
	pages = {71-76},
	author = {Manolis Koubarakis and Christos Tryfonopoulos and Stratos Idreos and Yannis Drougas},
	editor = {Karl Aberer}
}
@conference {Georgiadis_2002,
	title = {SmartGov: A Knowledge-Based Platform for Transactional Electronic Services},
	booktitle = {Lecture Notes in Computer Science},
	year = {2002},
	month = {9},
	pages = {362-369},
	publisher = {Springer Berlin Heidelberg},
	organization = {Springer Berlin Heidelberg},
	abstract = {Public transaction services (such as e-forms) although perceived the future of e-government have not yet realised their full potential. E-forms have a significant role in e-government, as they are the basis for implementing most of the twenty public services that all member states have to provide to their citizens and businesses. The aim of the SmartGov project is to specify, develop, deploy and evaluate a knowledge-based platform to assist public sector employees to generate online transaction services by simplifying their development, maintenance and integration with already installed IT systems. This platform will be evaluated in two European countries (in one Ministry and one Local Authority). This paper outlines key issues in the development of the SmartGov system platform.},
	doi = {10.1007/978-3-540-46138-8_59},
	url = {https://link.springer.com/chapter/10.1007/978-3-540-46138-8_59},
	author = {P. Georgiadis and Giorgos Lepouras and Costas Vassilakis and G. Boukis and E. Tambouris and S. Gorilas and E. Davenport and A. Macintosh and J. Fraser and D. Lochhead}
}
