2009 |
Representing Context-Dependent Information in Cultural Collections (Journal Article) Gergatsoulis, Manolis; Lilis, Pantelis; Lourdi, Irene; Papatheodorou, Christos International Journal of Semantic Computing, Volume: 3 (2), Pages: 255-276, 2009. @article{Gergatsoulis2009, title = {Representing Context-Dependent Information in Cultural Collections}, author = {Manolis Gergatsoulis and Pantelis Lilis and Irene Lourdi and Christos Papatheodorou }, url = {http://www.worldscinet.com/ijsc/03/0302/S1793351X09000756.html}, year = {2009}, date = {2009-01-02}, journal = {International Journal of Semantic Computing}, volume = {3}, number = {2}, pages = {255-276}, abstract = {An extension of the Dublin Core Collections Application Profile (DCCAP) suitable for representing context-dependent collection level metadata, is presented in this paper. The extended model, called Multidimensional DCCAP, is based on a multidimensional extension of RDF. Contexts are specified by assigning values to a set of appropriately chosen parameters called dimensions. The proposed extension allows the user to encode metadata for each defined context enriching substantially in this way the expressive power of the metadata model. Multidimensional DCCAP metadata model allows to represent the collection development evolution as well as to keep information created for various users categories, with various degrees of detail, or even in different languages.}, keywords = {}, pubstate = {published}, tppubtype = {article} } An extension of the Dublin Core Collections Application Profile (DCCAP) suitable for representing context-dependent collection level metadata, is presented in this paper. The extended model, called Multidimensional DCCAP, is based on a multidimensional extension of RDF. Contexts are specified by assigning values to a set of appropriately chosen parameters called dimensions. The proposed extension allows the user to encode metadata for each defined context enriching substantially in this way the expressive power of the metadata model. Multidimensional DCCAP metadata model allows to represent the collection development evolution as well as to keep information created for various users categories, with various degrees of detail, or even in different languages. |
Semantic Integration of Collection Description: Combining CIDOC/CRM and Dublin Core Collections Application Profile (Journal Article) Lourdi, Irene; Papatheodorou, Christos; Doerr, Martin D-Lib Magazine, Volume: 15 (7/8), 2009. @article{Lourdi2009, title = {Semantic Integration of Collection Description: Combining CIDOC/CRM and Dublin Core Collections Application Profile}, author = {Irene Lourdi and Christos Papatheodorou and Martin Doerr}, url = {http://www.dlib.org/dlib/july09/papatheodorou/07papatheodorou.html}, year = {2009}, date = {2009-01-02}, journal = {D-Lib Magazine}, volume = {15}, number = {7/8}, abstract = {This article is motivated by the demand for unified access to the wealth of distributed digital cultural collections, allowing users to make queries and discover information about them through integrated processes. Our effort originates from the semantic interoperability perspective and considers CIDOC/CRM as the mediating schema, which integrates in an optimal way the semantics of the collection-level metadata schemas and application profiles. The research reveals the complexity of mapping metadata schemas to ontologies and resolves particular difficulties by presenting the crosswalk between Dublin Core Collections Application Profile and CIDOC/CRM. }, keywords = {}, pubstate = {published}, tppubtype = {article} } This article is motivated by the demand for unified access to the wealth of distributed digital cultural collections, allowing users to make queries and discover information about them through integrated processes. Our effort originates from the semantic interoperability perspective and considers CIDOC/CRM as the mediating schema, which integrates in an optimal way the semantics of the collection-level metadata schemas and application profiles. The research reveals the complexity of mapping metadata schemas to ontologies and resolves particular difficulties by presenting the crosswalk between Dublin Core Collections Application Profile and CIDOC/CRM. |
Developing Query Patterns (Book Chapter) Constantopoulos, Panos; Dritsou, Vicky; Foustoucos, Eugenie Research and Advanced Technology for Digital Libraries, Volume: 5714/2009 , Pages: 119-124, Springer Berlin Heidelberg, 2009, ISBN: 978-3-642-04345-1. @inbook{Constantopoulos2009, title = {Developing Query Patterns}, author = {Panos Constantopoulos and Vicky Dritsou and Eugenie Foustoucos }, url = {http://link.springer.com/chapter/10.1007%2F978-3-642-04346-8_13}, doi = {10.1007/978-3-642-04346-8_13}, isbn = {978-3-642-04345-1}, year = {2009}, date = {2009-01-01}, booktitle = {Research and Advanced Technology for Digital Libraries}, volume = {5714/2009}, pages = {119-124}, publisher = {Springer Berlin Heidelberg}, series = {Lecture Notes in Computer Science}, abstract = {Query patterns enable effective information tools and provide guidance to users interested in posing complex questions about objects. Semantically, query patterns represent important questions, while syntactically they impose the correct formulation of queries. In this paper we address the development of query patterns at successive representation layers so as to expose dominant information requirements on one hand, and structures that can support effective user interaction and efficient implementation of query processing on the other. An empirical study for the domain of cultural heritage reveals an initial set of recurrent questions, which are then reduced to a modestly sized set of query patterns. A set of Datalog rules is developed in order to formally define these patterns which are also expressed as SPARQL queries.}, keywords = {}, pubstate = {published}, tppubtype = {inbook} } Query patterns enable effective information tools and provide guidance to users interested in posing complex questions about objects. Semantically, query patterns represent important questions, while syntactically they impose the correct formulation of queries. In this paper we address the development of query patterns at successive representation layers so as to expose dominant information requirements on one hand, and structures that can support effective user interaction and efficient implementation of query processing on the other. An empirical study for the domain of cultural heritage reveals an initial set of recurrent questions, which are then reduced to a modestly sized set of query patterns. A set of Datalog rules is developed in order to formally define these patterns which are also expressed as SPARQL queries. |
DCC&U: An Extended Digital Curation Lifecycle Model (Journal Article) Constantopoulos, Panos; Dallas, Costis; Androutsopoulos, Ion; Angelis, Stavros; Deligiannakis, Antonios; Gavrilis, Dimitris; Kotidis, Yiannis; Papatheodorou, Christos The International Journal of Digital Curation, Volume: 4 (1), Pages: 34-45, 2009. @article{Constantopoulos2009, title = {DCC&U: An Extended Digital Curation Lifecycle Model}, author = {Panos Constantopoulos and Costis Dallas and Ion Androutsopoulos and Stavros Angelis and Antonios Deligiannakis and Dimitris Gavrilis and Yiannis Kotidis and Christos Papatheodorou}, url = {http://www.ijdc.net/index.php/ijdc/article/viewFile/100/75}, year = {2009}, date = {2009-01-01}, journal = {The International Journal of Digital Curation}, volume = {4}, number = {1}, pages = {34-45}, abstract = {The proliferation of Web, database and social networking technologies has enabled us to produce, publish and exchange digital assets at an enormous rate. This vast amount of information that is either digitized or born-digital needs to be collected, organized and preserved in a way that ensures that our digital assets and the information they carry remain available for future use. Digital curation has emerged as a new inter-disciplinary practice that seeks to set guidelines for disciplined management of information. In this paper we review two recent models for digital curation introduced by the Digital Curation Centre (DCC) and the Digital Curation Unit (DCU) of the Athena Research Centre. We then propose a fusion of the two models that highlights the need to extend the digital curation lifecycle by adding (a) provisions for the registration of usage experience, (b) a stage for knowledge enhancement and (c) controlled vocabularies used by convention to denote concepts, properties and relations. The objective of the proposed extensions is twofold: (i) to provide a more complete lifecycle model for the digital curation domain; and (ii) to provide a stimulus for a broader discussion on the research agenda.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The proliferation of Web, database and social networking technologies has enabled us to produce, publish and exchange digital assets at an enormous rate. This vast amount of information that is either digitized or born-digital needs to be collected, organized and preserved in a way that ensures that our digital assets and the information they carry remain available for future use. Digital curation has emerged as a new inter-disciplinary practice that seeks to set guidelines for disciplined management of information. In this paper we review two recent models for digital curation introduced by the Digital Curation Centre (DCC) and the Digital Curation Unit (DCU) of the Athena Research Centre. We then propose a fusion of the two models that highlights the need to extend the digital curation lifecycle by adding (a) provisions for the registration of usage experience, (b) a stage for knowledge enhancement and (c) controlled vocabularies used by convention to denote concepts, properties and relations. The objective of the proposed extensions is twofold: (i) to provide a more complete lifecycle model for the digital curation domain; and (ii) to provide a stimulus for a broader discussion on the research agenda. |
2008 |
Building an adaptive museum gallery in Second Life (Paper in Conference Proceedings) Oberlander, Jon; Karakatsiotis, George; Isard, Amy; Androutsopoulos, Ion Trant,; Bearman, (Ed.): Museums and the Web 2008: Proceedings, Archives & Museum Informatics, 2008. @inproceedings{Oberlander2008, title = {Building an adaptive museum gallery in Second Life}, author = {Jon Oberlander and George Karakatsiotis and Amy Isard and Ion Androutsopoulos}, editor = {J. Trant and D. Bearman }, url = {http://www.archimuse.com/mw2008/papers/oberlander/oberlander.html}, year = {2008}, date = {2008-03-31}, booktitle = {Museums and the Web 2008: Proceedings}, publisher = {Archives & Museum Informatics}, abstract = {We describe initial work on building a virtual gallery, within Second Life, which can automatically tailor itself to an individual visitor, responding to their abilities, interests, preferences or history of interaction. The description of an object in the virtual world can be personalised to suit the beginner or the expert, varying how it is said—via the choice of language (such as English or Greek), the words, or the complexity of sentences—as well as what is said—by taking into account what else has been seen or described already. The guide delivering the descriptions can remain disembodied, or be embodied as a robotic avatar.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } We describe initial work on building a virtual gallery, within Second Life, which can automatically tailor itself to an individual visitor, responding to their abilities, interests, preferences or history of interaction. The description of an object in the virtual world can be personalised to suit the beginner or the expert, varying how it is said—via the choice of language (such as English or Greek), the words, or the complexity of sentences—as well as what is said—by taking into account what else has been seen or described already. The guide delivering the descriptions can remain disembodied, or be embodied as a robotic avatar. |
Aspects of a digital curation agenda for cultural heritage (Paper in Conference Proceedings) Constantopoulos, Panos; Dallas, Costis Proceedings of the IEEE International Conference on Distributed Human-Machine Systems, 2008, Pages: 317–322, 2008. @inproceedings{Constantopoulos2008, title = {Aspects of a digital curation agenda for cultural heritage}, author = {Panos Constantopoulos and Costis Dallas }, url = {http://www.dcu.gr/wp-content/uploads/2016/10/Aspects-of-a-digital-curation-agenda-for-cultural-heritage.pdf}, year = {2008}, date = {2008-03-03}, booktitle = {Proceedings of the IEEE International Conference on Distributed Human-Machine Systems, 2008}, pages = {317--322}, abstract = {Digital curation emerged recently as an important concept in the theory and management of cultural heritage information. This paper presents the approach and research agenda adopted by the newly-founded Digital Curation Unit of Athena Research Centre, Greece, and illustrates its relevance to the management and use of cultural heritage digital collections. It highlights the need to tackle the risks of epistemic failure tied with the prospect of long-term access to curated repositories, and presents the case for multidisciplinary research, informed by humanistic and social science as well as computer science perspectives. A multi-tiered research agenda, it argues, would need to resolve problems of representing domain knowledge; developing and maintaining knowledge resources; streamlining the enrichment of these resources from text; automatically generating text from databases; discovering and accessing domain associations; enabling the use of databases containing valuable data over time; conceptualizations of epistemic discourse, and communication genres in specific contexts; grounded research on the motives, activities and contexts of digital resources appraisal, knowledge enhancement and use; and, cost-benefit assessment of preservation policies. These complementary approaches are particularly relevant in the field of cultural heritage, where large-scale digitisation of heritage resources on one hand, and web-based social computing on the other, already create a deluge of un-curated and poorly represented cultural information.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } Digital curation emerged recently as an important concept in the theory and management of cultural heritage information. This paper presents the approach and research agenda adopted by the newly-founded Digital Curation Unit of Athena Research Centre, Greece, and illustrates its relevance to the management and use of cultural heritage digital collections. It highlights the need to tackle the risks of epistemic failure tied with the prospect of long-term access to curated repositories, and presents the case for multidisciplinary research, informed by humanistic and social science as well as computer science perspectives. A multi-tiered research agenda, it argues, would need to resolve problems of representing domain knowledge; developing and maintaining knowledge resources; streamlining the enrichment of these resources from text; automatically generating text from databases; discovering and accessing domain associations; enabling the use of databases containing valuable data over time; conceptualizations of epistemic discourse, and communication genres in specific contexts; grounded research on the motives, activities and contexts of digital resources appraisal, knowledge enhancement and use; and, cost-benefit assessment of preservation policies. These complementary approaches are particularly relevant in the field of cultural heritage, where large-scale digitisation of heritage resources on one hand, and web-based social computing on the other, already create a deluge of un-curated and poorly represented cultural information. |
INDIGO: Interaction with Personality and Dialogue Enabled Robot (Presentation) Konstantopoulos, Stasinos; Androutsopoulos, Ion; Baltzakis, Haris; Karkaletsis, Vangelis; Matheson, Colin; Tegos, Athanasios; Trahanias, Panos Demonstration presented at the 18th European Conference on Artificial Intelligence , 2008. @misc{Konstantopoulos2008, title = {INDIGO: Interaction with Personality and Dialogue Enabled Robot}, author = {Stasinos Konstantopoulos and Ion Androutsopoulos and Haris Baltzakis and Vangelis Karkaletsis and Colin Matheson and Athanasios Tegos and Panos Trahanias}, url = {http://www.dcu.gr/wp-content/uploads/2016/10/INDIGO-Interaction-with-Personality-and-Dialogue-Enabled-Robots.pdf}, year = {2008}, date = {2008-01-01}, abstract = {The subject of this demonstration is human-robot interaction, focusing on robotic personality modelling and dialogue management. These are demonstrated in a museum guide use-case, operating in a simulated environment. The main technical innovations presented are the robotic personality model, the dialogue & action management system, and the robotic integration & simulation platform. }, howpublished = {Demonstration presented at the 18th European Conference on Artificial Intelligence}, keywords = {}, pubstate = {published}, tppubtype = {presentation} } The subject of this demonstration is human-robot interaction, focusing on robotic personality modelling and dialogue management. These are demonstrated in a museum guide use-case, operating in a simulated environment. The main technical innovations presented are the robotic personality model, the dialogue & action management system, and the robotic integration & simulation platform. |
Exploring usefulness and usability in the evaluation of open access digital libraries (Journal Article) Tsakonas, Giannis; Papatheodorou, Christos Information Processing and Management: an International Journal, Volume: 44 (3), Pages: 1234-1250, 2008. @article{Tsakonas2008, title = {Exploring usefulness and usability in the evaluation of open access digital libraries}, author = {Giannis Tsakonas and Christos Papatheodorou}, url = {http://dl.acm.org/citation.cfm?id=1351371}, year = {2008}, date = {2008-01-01}, journal = {Information Processing and Management: an International Journal}, volume = {44}, number = {3}, pages = {1234-1250}, abstract = {Advances in the publishing world have emerged new models of digital library development. Open access publishing modes are expanding their presence and realize the digital library idea in various means. While user-centered evaluation of digital libraries has drawn considerable attention during the last years, these systems are currently viewed from the publishing, economic and scientometric perspectives. The present study explores the concepts of usefulness and usability in the evaluation of an e-print archive. The results demonstrate that several attributes of usefulness, such as the level and the relevance of information, and usability, such as easiness of use and learnability, as well as functionalities commonly met in these systems, affect user interaction and satisfaction. }, keywords = {}, pubstate = {published}, tppubtype = {article} } Advances in the publishing world have emerged new models of digital library development. Open access publishing modes are expanding their presence and realize the digital library idea in various means. While user-centered evaluation of digital libraries has drawn considerable attention during the last years, these systems are currently viewed from the publishing, economic and scientometric perspectives. The present study explores the concepts of usefulness and usability in the evaluation of an e-print archive. The results demonstrate that several attributes of usefulness, such as the level and the relevance of information, and usability, such as easiness of use and learnability, as well as functionalities commonly met in these systems, affect user interaction and satisfaction. |
Designing Interoperable Museum Information Systems (Paper in Conference Proceedings) Gavrilis, Dimitris; Tsakonas, Giannis; Papatheodorou, Christos Proceedings of the 14th International Conference on Virtual Systems and Multimedia, 2008. @inproceedings{Gavrilis2008, title = {Designing Interoperable Museum Information Systems}, author = {Dimitris Gavrilis and Giannis Tsakonas and Christos Papatheodorou}, url = {http://users.ionio.gr/~papatheodor/papers/VSMM08-final.pdf}, year = {2008}, date = {2008-01-01}, booktitle = {Proceedings of the 14th International Conference on Virtual Systems and Multimedia}, abstract = {Museum collections are characterized by heterogeneity, since they usually host a plethora of objects of categories, while each of them requires different description policies and metadata standards. Moreover the museum records, which keep the history and evolution of the hosted collections, request proactive curation in order to preserve this rich and diverse information. In this paper, the architecture of an innovative museum information system, as well as its implementation details is presented. In particular the requirements and the system architecture are presented along with the problems that were encountered. The main directions of the system design are (a) to increase interoperability levels and therefore assist proactive curation and (b) to enhance navigation by the usage of handheld devices. The first direction is satisfied by the design of a rich metadata schema based on the CIDOC/CRM standard. The second direction is fulfilled by the implementation of a module, which integrates the museum database with a subsystem appropriate to support user navigation into the museum floors and rooms. The module is expressed as a navigation functionality, which is accessed through handheld devices and peripherals, such as PDAs and RFID tags. The proposed system is functional and operates into the Solomos Museum, situated in Zakynthos island, Greece.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } Museum collections are characterized by heterogeneity, since they usually host a plethora of objects of categories, while each of them requires different description policies and metadata standards. Moreover the museum records, which keep the history and evolution of the hosted collections, request proactive curation in order to preserve this rich and diverse information. In this paper, the architecture of an innovative museum information system, as well as its implementation details is presented. In particular the requirements and the system architecture are presented along with the problems that were encountered. The main directions of the system design are (a) to increase interoperability levels and therefore assist proactive curation and (b) to enhance navigation by the usage of handheld devices. The first direction is satisfied by the design of a rich metadata schema based on the CIDOC/CRM standard. The second direction is fulfilled by the implementation of a module, which integrates the museum database with a subsystem appropriate to support user navigation into the museum floors and rooms. The module is expressed as a navigation functionality, which is accessed through handheld devices and peripherals, such as PDAs and RFID tags. The proposed system is functional and operates into the Solomos Museum, situated in Zakynthos island, Greece. |
Semantic integration of Collection-level information: A Crosswalk between CIDOC/CRM and Dublin Core Collections Application Profile (Paper in Conference Proceedings) Lourdi, Irini; Papatheodorou, Christos Proceedings of the annual conference of the International Documentation Committee of the International Council of Museums (CIDOC 2008), Volume: 15 2008, ISSN: 1082-9873. @inproceedings{Lourdi2008, title = {Semantic integration of Collection-level information: A Crosswalk between CIDOC/CRM and Dublin Core Collections Application Profile}, author = {Irini Lourdi and Christos Papatheodorou}, url = {http://www.ionio.gr/~papatheodor/papers/cidoc2008.pdf}, issn = {1082-9873}, year = {2008}, date = {2008-01-01}, booktitle = {Proceedings of the annual conference of the International Documentation Committee of the International Council of Museums (CIDOC 2008)}, volume = {15 }, number = {7-8}, abstract = {This paper is motivated by the demand for unified access, navigation and information retrieval from the wealth of composite, distributed and heterogeneous digital cultural collections. The last years, collection-level metadata is considered to be the key of integrated access of so many resources, since they represent the inherent and contextual characteristics of a collection. Our effort origins from the semantic interoperability perspective and considers CIDOC/CRM as the mediating schema, which integrates in an optimal way the semantics of the collection level metadata schemas and application profiles. In particular a crosswalk between Dublin Core Collections Application Profile and CIDOC/CRM is presented so that the semantics of each DCCAP element is mapped to CIDOC/CRM. The derived crosswalk is bidirectional implementing the mapping from DCCAP to CIDOC/CRM and vice versa. The paper reveals the complexity of mapping metadata schemas to ontologies and resolves particular difficulties providing a real world semantic integration case. }, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } This paper is motivated by the demand for unified access, navigation and information retrieval from the wealth of composite, distributed and heterogeneous digital cultural collections. The last years, collection-level metadata is considered to be the key of integrated access of so many resources, since they represent the inherent and contextual characteristics of a collection. Our effort origins from the semantic interoperability perspective and considers CIDOC/CRM as the mediating schema, which integrates in an optimal way the semantics of the collection level metadata schemas and application profiles. In particular a crosswalk between Dublin Core Collections Application Profile and CIDOC/CRM is presented so that the semantics of each DCCAP element is mapped to CIDOC/CRM. The derived crosswalk is bidirectional implementing the mapping from DCCAP to CIDOC/CRM and vice versa. The paper reveals the complexity of mapping metadata schemas to ontologies and resolves particular difficulties providing a real world semantic integration case. |
Preparing DARIAH (Paper in Conference Proceedings) Constantopoulos, Panos; Dallas, Costis; Doorn,; Gavrilis, Dimitris; Gros,; Stylianou, Ioannides, Marinos (Ed.): Digital Heritage - proceedings of the 14th International Conference on Virtual Systems and Multimedia, Pages: 164-166, Archaeolingua, 2008, ISBN: 9789639911017. @inproceedings{Constantopoulos2008, title = {Preparing DARIAH}, author = {Panos Constantopoulos and Costis Dallas and Doorn and Dimitris Gavrilis and Gros and Stylianou}, editor = {Marinos Ioannides}, url = {http://vsmm2008.euromed2010.eu/vsmm2008/e_Proceedings/papers/shortpaper.pdf#page=170 http://www.dcu.gr/wp-content/uploads/2016/10/Preparing-Dariah.pdf}, isbn = {9789639911017}, year = {2008}, date = {2008-01-01}, booktitle = {Digital Heritage - proceedings of the 14th International Conference on Virtual Systems and Multimedia}, pages = {164-166}, publisher = {Archaeolingua}, abstract = {In this paper, a preparatory project for an integrated European research infrastructure in the humanities is presented. This project, Preparing for the construction of the Digital Research Infrastructure for the Arts and Humanities - or Preparing DARIAH for short, is part of the ESFRI e-infrastructures programme and supports the emergence of a new collaborative framework in which researchers are able to maximise the impact of their work on the international stage and aims at providing the foundations for the timely construction of the infrastructure requisite for the arts, humanities and cultural heritage communities in the digital age. DARIAH uses an interdisciplinary approach and involves tackling a number of interrelated issues such as strategic, organisational, financial, technical and conceptual in order to facilitate long-term access to and use of all European humanities and cultural heritage information for the purposes of enhancing and expanding research, thereby increasing our knowledge and understanding of our histories, heritage, languages and cultures. The DARIAH network will act as a place where the incubation of new ideas and ways of working can be facilitated and developed, and then transitioned into established organisations thus ensuring long term sustainability and stability and the integration of these methods and techniques into everyday research practice. DARIAH will support research practitioners at all stages in the research process, and at differing levels of sophistication, from beginners through to those employing advanced techniques and methodologies.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In this paper, a preparatory project for an integrated European research infrastructure in the humanities is presented. This project, Preparing for the construction of the Digital Research Infrastructure for the Arts and Humanities - or Preparing DARIAH for short, is part of the ESFRI e-infrastructures programme and supports the emergence of a new collaborative framework in which researchers are able to maximise the impact of their work on the international stage and aims at providing the foundations for the timely construction of the infrastructure requisite for the arts, humanities and cultural heritage communities in the digital age. DARIAH uses an interdisciplinary approach and involves tackling a number of interrelated issues such as strategic, organisational, financial, technical and conceptual in order to facilitate long-term access to and use of all European humanities and cultural heritage information for the purposes of enhancing and expanding research, thereby increasing our knowledge and understanding of our histories, heritage, languages and cultures. The DARIAH network will act as a place where the incubation of new ideas and ways of working can be facilitated and developed, and then transitioned into established organisations thus ensuring long term sustainability and stability and the integration of these methods and techniques into everyday research practice. DARIAH will support research practitioners at all stages in the research process, and at differing levels of sophistication, from beginners through to those employing advanced techniques and methodologies. |
Using Handhelds to Search in Physical and Digital Information Spaces (Paper in Conference Proceedings) Veronikis, Spyros; Gavrilis, Dimitris; Zoutsou, Kyriaki; Papatheodorou, Chritos Proceedings of the 2008 The Second International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, of the series UBICOMM '08 Pages: 225-230, IEEE Computer Society, 2008. @inproceedings{Veronikis2008, title = {Using Handhelds to Search in Physical and Digital Information Spaces}, author = {Spyros Veronikis and Dimitris Gavrilis and Kyriaki Zoutsou and Chritos Papatheodorou}, url = {http://portal.acm.org/citation.cfm?id=1448098 http://www.dcu.gr/wp-content/uploads/2016/10/Using-Handhelds-to-Search-in-Physical-and-Digital-Information-Spaces.pdf}, doi = {10.1109/UBICOMM.2008.9}, year = {2008}, date = {2008-01-01}, booktitle = {Proceedings of the 2008 The Second International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies}, pages = {225-230}, publisher = {IEEE Computer Society}, series = {UBICOMM '08}, abstract = {In recent years a wealth of information is becoming available thanks to computer and networking technology. Modern libraries incorporate in their collections information content in both physical and digital form. Meanwhile, mobile computing enables the library patrons to access that content anytime, anywhere. In this paper we present the design procedure of a new library service that supports users in seeking information in hybrid collections while being in the stacks, thus enabling content retrieval from a unified information space. Moreover an evaluation model and methodology and the results of an experimental procedure are presented aiming to assess the user satisfaction for the new service.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In recent years a wealth of information is becoming available thanks to computer and networking technology. Modern libraries incorporate in their collections information content in both physical and digital form. Meanwhile, mobile computing enables the library patrons to access that content anytime, anywhere. In this paper we present the design procedure of a new library service that supports users in seeking information in hybrid collections while being in the stacks, thus enabling content retrieval from a unified information space. Moreover an evaluation model and methodology and the results of an experimental procedure are presented aiming to assess the user satisfaction for the new service. |
Enhancing Library Services with Web 2.0 functionalities (Paper in Conference Proceedings) Gavrilis, Dimitris; Kakali,; Papatheodorou, Christos Research and Advanced Technology for Digital Libraries. 12th European Conference, ECDL 2008, Aarhus, Denmark, September 14-19, 2008. Proceedings, Volume: 5173 of the series Lecture Notes in Computer Science Pages: 148-159, Springer Berlin Heidelberg, 2008. @inproceedings{Gavrilis2008b, title = {Enhancing Library Services with Web 2.0 functionalities}, author = {Dimitris Gavrilis and Kakali and Christos Papatheodorou}, url = {http://www.dcu.gr/wp-content/uploads/2016/10/Enhancing-Library-Services-with-Web-2.0-functionalities.pdf}, year = {2008}, date = {2008-01-01}, booktitle = {Research and Advanced Technology for Digital Libraries. 12th European Conference, ECDL 2008, Aarhus, Denmark, September 14-19, 2008. Proceedings}, volume = {5173}, pages = {148-159}, publisher = {Springer Berlin Heidelberg}, series = {Lecture Notes in Computer Science}, abstract = {In this paper, a prototype of an Online Public Access Catalog (OPAC) is presented. This new OPAC features new functionalities and utilizes web 2.0 technologies in order to deliver improved search and retrieval services. Some of these new services include social tag annotations, user opinions and ranks and tag-based similarity searches. The prototype is evaluated by a user group through questionnaires, interviews and with the system's integrated logging mechanism. The results are encouraging enough and show that Library 2.0 technologies seem to be acceptable by the majority of the users. }, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In this paper, a prototype of an Online Public Access Catalog (OPAC) is presented. This new OPAC features new functionalities and utilizes web 2.0 technologies in order to deliver improved search and retrieval services. Some of these new services include social tag annotations, user opinions and ranks and tag-based similarity searches. The prototype is evaluated by a user group through questionnaires, interviews and with the system's integrated logging mechanism. The results are encouraging enough and show that Library 2.0 technologies seem to be acceptable by the majority of the users. |
NaturalOWL: Generating Texts from OWL Ontologies in Protégé and in Second Life (Presentation) Karakatsiotis, George; Galanis, Dimitrios; Androutsopoulos, Ion Demonstration presented at the 18th European Conference on Artificial Intelligence , 2008. @misc{Karakatsiotis2008, title = {NaturalOWL: Generating Texts from OWL Ontologies in Protégé and in Second Life}, author = {George Karakatsiotis and Dimitrios Galanis and Ion Androutsopoulos}, url = {http://www.aueb.gr/users/ion/docs/ecai2008_naturalowl.pdf}, year = {2008}, date = {2008-01-01}, abstract = {NaturalOWL is an open-source natural language generation engine written in Java. It produces descriptions of individuals (e.g., items for sale, museum exhibits) and classes (e.g., types of exhibits) in English and Greek from OWL DL ontologies. The ontologies must have been annotated in RDF with linguistic and user modeling resources. We demonstrate a plug-in for Protégé that can be used to produce these resources and to generate texts by invoking NaturalOWL. We also demonstrate how NaturalOWL can be used by robotic avatars in Second Life to describe the exhibits of virtual museums. NaturalOWL demonstrates the benefits of Natural Language Generation (NLG) on the Semantic Web. Organizations that need to publish information about objects, such as exhibits or products, can publish OWL ontologies instead of texts. NLG engines, embedded in browsers or Web servers, can then render the ontologies in multiple natural languages, whereas computer programs may access the ontologies directly. }, howpublished = {Demonstration presented at the 18th European Conference on Artificial Intelligence}, keywords = {}, pubstate = {published}, tppubtype = {presentation} } NaturalOWL is an open-source natural language generation engine written in Java. It produces descriptions of individuals (e.g., items for sale, museum exhibits) and classes (e.g., types of exhibits) in English and Greek from OWL DL ontologies. The ontologies must have been annotated in RDF with linguistic and user modeling resources. We demonstrate a plug-in for Protégé that can be used to produce these resources and to generate texts by invoking NaturalOWL. We also demonstrate how NaturalOWL can be used by robotic avatars in Second Life to describe the exhibits of virtual museums. NaturalOWL demonstrates the benefits of Natural Language Generation (NLG) on the Semantic Web. Organizations that need to publish information about objects, such as exhibits or products, can publish OWL ontologies instead of texts. NLG engines, embedded in browsers or Web servers, can then render the ontologies in multiple natural languages, whereas computer programs may access the ontologies directly. |
A Conversant Robotic Guide to Art Collections (Paper in Conference Proceedings) Vogiatzis, Dimitrios; Galanis, Dimitrios; Karkaletsis, Vangelis; Androutsopoulos, Ion; Spyropoulos, Constantine Proceedings of the 2nd Workshop on Language Technology for Cultural Heritage Data, Language Resources and Evaluation Conference (LREC 2008), 2008. @inproceedings{Vogiatzis2008, title = {A Conversant Robotic Guide to Art Collections}, author = {Dimitrios Vogiatzis and Dimitrios Galanis and Vangelis Karkaletsis and Ion Androutsopoulos and Constantine D. Spyropoulos }, url = {http://www.dcu.gr/wp-content/uploads/2016/10/A-Conversant-Robotic-Guide-to-Art-Collections.pdf}, year = {2008}, date = {2008-01-01}, booktitle = {Proceedings of the 2nd Workshop on Language Technology for Cultural Heritage Data, Language Resources and Evaluation Conference (LREC 2008)}, abstract = {We present the dialogue system of a robot that has been developed to serve as a museum guide. The robot interacts with human visitors in natural language, receiving instructions and providing information about the exhibits. Moreover, being mobile, it physically approaches the exhibits it provides information about. Although the robotic platform contains many modules, including navigation, speech recognition and synthesis, our focus in this paper is the dialogue system, which supports the sessions between humans and the robot, as well as the natural language generation engine, which generates the text to be spoken. Both modules are closely intertwined and depend on an ontology represented in OWL. The robot supports dialogues in both English and Greek. }, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } We present the dialogue system of a robot that has been developed to serve as a museum guide. The robot interacts with human visitors in natural language, receiving instructions and providing information about the exhibits. Moreover, being mobile, it physically approaches the exhibits it provides information about. Although the robotic platform contains many modules, including navigation, speech recognition and synthesis, our focus in this paper is the dialogue system, which supports the sessions between humans and the robot, as well as the natural language generation engine, which generates the text to be spoken. Both modules are closely intertwined and depend on an ontology represented in OWL. The robot supports dialogues in both English and Greek. |
2007 |
Integrating Dublin Core Metadata for Cultural Heritage Collections Using Ontologies (Paper in Conference Proceedings) Kakali,; Lourdi, Irini; Stasinopoulou,; Bountouri,; Papatheodorou, Christos; Doerr, Martin; Gergatsoulis, Proceedings of the 7th International Conference on Dublin Core and Metadata Applications, DC-2007, Pages: 128-139, 2007. @inproceedings{Kakali2007, title = {Integrating Dublin Core Metadata for Cultural Heritage Collections Using Ontologies}, author = {Kakali and Irini Lourdi and Stasinopoulou and Bountouri and Christos Papatheodorou and Martin Doerr and Gergatsoulis}, url = {http://eprints.rclis.org/11001/}, year = {2007}, date = {2007-08-01}, booktitle = {Proceedings of the 7th International Conference on Dublin Core and Metadata Applications, DC-2007}, pages = {128-139}, abstract = {Metadata interoperability is an active research area, especially for cultural heritage collections, which consist of heterogeneous objects described by a variety of metadata schemas. In this paper we propose an ontology-based metadata interoperability approach, which exploits, in an optimal way, the semantics of metadata schemas. In particular, we propose the use of CIDOC/CRM ontology as a mediating schema and present a methodology for mapping DC Type Vocabulary to CIDOC/CRM, demonstrating a real-world effort for ontology-based metadata integration.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } Metadata interoperability is an active research area, especially for cultural heritage collections, which consist of heterogeneous objects described by a variety of metadata schemas. In this paper we propose an ontology-based metadata interoperability approach, which exploits, in an optimal way, the semantics of metadata schemas. In particular, we propose the use of CIDOC/CRM ontology as a mediating schema and present a methodology for mapping DC Type Vocabulary to CIDOC/CRM, demonstrating a real-world effort for ontology-based metadata integration. |
Learning Textual Entailment using SVMs and String Similarity Measures (Paper in Conference Proceedings) Malakasiotis, Prodromos; Androutsopoulos, Ion Proceedings of the Workshop on Textual Entailment and Paraphrasing, 45th Annual Meeting of the Association for Computational Linguistics (ACL 2007), Pages: 42-47, 2007. @inproceedings{Malakasiotis2007, title = {Learning Textual Entailment using SVMs and String Similarity Measures}, author = {Prodromos Malakasiotis and Ion Androutsopoulos}, url = {http://www.aueb.gr/users/ion/docs/rte3_paper.pdf}, year = {2007}, date = {2007-06-01}, booktitle = {Proceedings of the Workshop on Textual Entailment and Paraphrasing, 45th Annual Meeting of the Association for Computational Linguistics (ACL 2007)}, pages = {42-47}, abstract = {We present the system that we submitted to the 3rd Pascal Recognizing Textual Entailment Challenge. It uses four Support Vector Machines, one for each subtask of the challenge, with features that correspond to string similarity measures operating at the lexical and shallow syntactic level.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } We present the system that we submitted to the 3rd Pascal Recognizing Textual Entailment Challenge. It uses four Support Vector Machines, one for each subtask of the challenge, with features that correspond to string similarity measures operating at the lexical and shallow syntactic level. |
A multi-layer metadata schema for digital folklore collections (Journal Article) Lourdi, Irene; Papatheodorou, Christos; Nikolaidou, Mara Journal of Information Science, Volume: 33 (2), Pages: 197-213, 2007. @article{Lourdi2007, title = {A multi-layer metadata schema for digital folklore collections}, author = {Irene Lourdi and Christos Papatheodorou and Mara Nikolaidou}, url = {http://jis.sagepub.com/cgi/content/abstract/33/2/197}, year = {2007}, date = {2007-01-02}, journal = {Journal of Information Science}, volume = {33}, number = {2}, pages = {197-213}, abstract = {Digital folklore collections are valuable sources for studying the cultural and oral tradition of a country. The main difficulty in managing such collections is material heterogeneity (handwritten texts, photographs, 3D objects, sound recordings etc.) that imposes different digitization, description and maintenance practices. A multi-layer metadata model for the description of a digital folklore collection is presented. The proposed meta-data policy considers a collection as a hierarchy of entities and combines different metadata schemas for the management of each entity. The metadata model integrates elements from different metadata schemas ensuring efficient information recovery from all structural levels. Furthermore, interoperability between the used metadata schemas is discussed and a Topic Maps model is presented as an approach for developing mappings.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Digital folklore collections are valuable sources for studying the cultural and oral tradition of a country. The main difficulty in managing such collections is material heterogeneity (handwritten texts, photographs, 3D objects, sound recordings etc.) that imposes different digitization, description and maintenance practices. A multi-layer metadata model for the description of a digital folklore collection is presented. The proposed meta-data policy considers a collection as a hierarchy of entities and combines different metadata schemas for the management of each entity. The metadata model integrates elements from different metadata schemas ensuring efficient information recovery from all structural levels. Furthermore, interoperability between the used metadata schemas is discussed and a Topic Maps model is presented as an approach for developing mappings. |
Named Entity Recognition in Greek Texts with an Ensemble of SVMs and Active Learning (Journal Article) Lucarreli, Giorgios; Vasilakos, Xenofon; Androutsopoulos, Ion International Journal on Artificial Intelligence Tools (IJAIT), Volume: 16 (6), Pages: 1015 - 1045, 2007. @article{Lucarreli2007, title = {Named Entity Recognition in Greek Texts with an Ensemble of SVMs and Active Learning}, author = {Giorgios Lucarreli and Xenofon Vasilakos and Ion Androutsopoulos}, url = {http://db0.worldscinet.com/worldsci-staging/detail.nsp}, year = {2007}, date = {2007-01-01}, journal = {International Journal on Artificial Intelligence Tools (IJAIT)}, volume = {16}, number = {6}, pages = {1015 - 1045}, abstract = {We present a freely available named-entity recognizer for Greek texts that identifies temporal expressions, person, and organization names. For temporal expressions, it relies on semi-automatically produced patterns. For person and organization names, it employs an ensemble of Support Vector Machines that scan the input text in two passes. The ensemble is trained using active learning, whereby the system itself proposes candidate training instances to be annotated by a human during training. The recognizer was evaluated on both a general collection of newspaper articles and a more focussed, in terms of topics, collection of financial articles.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We present a freely available named-entity recognizer for Greek texts that identifies temporal expressions, person, and organization names. For temporal expressions, it relies on semi-automatically produced patterns. For person and organization names, it employs an ensemble of Support Vector Machines that scan the input text in two passes. The ensemble is trained using active learning, whereby the system itself proposes candidate training instances to be annotated by a human during training. The recognizer was evaluated on both a general collection of newspaper articles and a more focussed, in terms of topics, collection of financial articles. |
Ontology-based Metadata Integration in the Cultural Heritage Domain (Paper in Conference Proceedings) Stasinopoulou, Thomais; Bountouri, Lina; Lourdi, Irini; Papatheodorou, Christos; Doerr, Martin; Gergatsoulis, Manolis Proceedings of the 10th International Conference on Asian Digital Libraries, ICADL-2007, Hanoi, Vietnam, December 2007, Lecture Notes in Computer Science (LNCS), Volume: 4822/2007 Pages: 165-175, 2007. @inproceedings{Stasinopoulou2007, title = {Ontology-based Metadata Integration in the Cultural Heritage Domain}, author = {Thomais Stasinopoulou and Lina Bountouri and Irini Lourdi and Christos Papatheodorou and Martin Doerr and Manolis Gergatsoulis}, url = {http://www.springerlink.com/content/k252223528n55127/}, year = {2007}, date = {2007-01-01}, booktitle = {Proceedings of the 10th International Conference on Asian Digital Libraries, ICADL-2007, Hanoi, Vietnam, December 2007, Lecture Notes in Computer Science (LNCS)}, volume = {4822/2007}, pages = {165-175}, abstract = {In this paper, we propose an ontology-based metadata integration methodology for the cultural heritage domain. The proposed real - world approach considers an integration architecture in which CIDOC/CRM ontology acts as a mediating scheme. In this context, we present a mapping methodology from Encoded Archival Description (EAD) and Dublin Core (DC) metadata to CIDOC/CRM, and discuss the faced difficulties.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In this paper, we propose an ontology-based metadata integration methodology for the cultural heritage domain. The proposed real - world approach considers an integration architecture in which CIDOC/CRM ontology acts as a mediating scheme. In this context, we present a mapping methodology from Encoded Archival Description (EAD) and Dublin Core (DC) metadata to CIDOC/CRM, and discuss the faced difficulties. |