Christos Papatheodorou

Christos Papatheodorou
Ionian University | IONIO · Department of Archives, Library Science and Museum Studies

Computer Science

About

118
Publications
27,541
Reads
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2,124
Citations
Citations since 2016
19 Research Items
693 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Additional affiliations
January 2015 - April 2016
Ionian University
Position
  • Professor, Chairman of Department

Publications

Publications (118)
Chapter
There is a burgeoning discussion on creating a new schema for Oral History, an Oral History Core. In this paper we present the characteristics of Oral History collections and the problems users might face when attempting to access this type of material. As a solution, we propose an integration model. From the cultural heritage milieu, we have chose...
Conference Paper
During the long history of the philharmonic bands in the Ionian Islands, since the mid of the nineteenth century, valuable archives of handwritten music scores have been established. These archives consist of the scores of original works locally created and from adaptations of western music works of Greek and other European composers. For the long-...
Article
The mapping from BIBFRAME 2.0 to Resource Description and Access (RDA) is studied focusing on core entities, inherent relationships, and derivative relationships. The proposed mapping rules are evaluated with two gold datasets. Findings indicate that 1) core entities, inherent and derivative relationships may be mapped to RDA, 2) the use of the bf:...
Chapter
In the era of enormous information production human capabilities have reached their limits. The need for automatic information processing which would not be incommensurate to human sophistication seems to be more than imperative. Information scientists have focused on the development of techniques and processes that would assist human contribution...
Article
Semantic interoperability between Resource Description and Access (RDA) and BIBFRAME models is of great interest to the library community. In this context, this work investigates the mapping of core entities, inherent and derivative relationships from RDA to BIBFRAME, and proposes mapping rules assessed using two gold datasets. Findings indicate th...
Conference Paper
Full-text available
In the era of enormous information production human capabilities have reached their limits. The need for automatic information processing which would not be incommensurate to human sophistication seems to be more than imperative. Information scientists have focused on the development of techniques and processes that would assist human contribution...
Article
Full-text available
The multidimensional nature of digital libraries evaluation domain poses several challenges to the research communities that intend to assess criteria, methods, products and tools, and also practice them. The amount of scientific production that is published in the domain hinders and disorientates the interested researchers. These researchers need...
Chapter
Support of the exploration user task demands the explicit representation of bibliographic families and of content relationships. Seamless navigation through differently modelled bibliographic datasets presumes the existence of mappings. Semantic interoperability through mappings will be evaluated using a testbed. This paper starts with the fine-tun...
Conference Paper
In the environment of the World Wide Web large volumes of library data have been published following different conceptual models. The navigation through these volumes and the data interlinking require the development of mappings between the conceptual models. Library conceptual models provide constructs for the representation of bibliographic famil...
Article
Full-text available
Research e-infrastructures, digital archives, and data services have become important pillars of scientific enterprise that in recent decades have become ever more collaborative, distributed, and data intensive. The archaeological research community has been an early adopter of digital tools for data acquisition, organization, analysis, and present...
Article
Full-text available
Research e-infrastructures, digital archives and data services have become important pillars of scientific enterprise that in recent decades has become ever more collaborative, distributed and data-intensive. The archaeological research community has been an early adopter of digital tools for data acquisition, organisation, analysis and presentatio...
Conference Paper
Metadata interoperability requires the development of mappings and crosswalks between different schemas. Crosswalks development is a laborious and complex task especially when metadata of compound objects include hierarchical structures. A typical case of such a complexity is finding aids that describe archives that include hierarchies of subordina...
Conference Paper
Metadata aggregation is a task increasingly encountered in many projects involving data repositories. The small number of specialized software for this task indicates that in most cases customized software is used to perform aggregation, which in turn relates to the highly complex tasks and architectures involved. In this paper, the metadata and ob...
Conference Paper
Digital libraries evaluation is characterised as an interdisciplinary and multidisciplinary domain posing a set of challenges to the research communities that intend to utilise and assess criteria, methods and tools. The amount of scientific production, which is published on the field, hinders and disorientates the researchers who are interested in...
Conference Paper
The multidimensional nature of digital libraries evaluation domain and the amount of scientific production published on the field hinders and disorientates the interested researchers who contemplate to focus on the specific domain. These communities need guidance in order to exploit the considerable amount of data and the diversity of methods effec...
Article
Integration of library data into the Semantic Web environment is a key issue for libraries and is approached on the basis of interoperability between conceptual models. Several data models exist for the representation and publication of library data in the Semantic Web and therefore inter-domain and intra-domain interoperability issues emerge as a...
Conference Paper
The need for good quality metadata records becomes a necessity given the large quantities of digital content that is available through digital repositories and the increasing number of web services that use this content. The context in which metadata are generated and used affects the problem in question and therefore a flexible metadata quality ev...
Conference Paper
The successful management of textual information is a rising challenge for all the researchers’ communities, in order firstly to assess its current and previous statuses and secondly to enrich the level of their metadata description. The huge amount of unstructured data that is produced has consequently populated text mining techniques for its inte...
Conference Paper
Integration of library data into the Linked Data environment is a key issue in libraries and is approached on the basis of interoperability between library data conceptual models. Achieving interoperability for different representations of the same or related entities between the library and cultural heritage domains shall enhance rich bibliographi...
Conference Paper
Full-text available
The growth of the digital resources produced by the re-search activities demand the development of e-Infrastructures in which researchers can access remote facilities, select and re-use huge volumes of data and services, run complex experimental processes and share results. Data registries aim to describe uniformly the data of e-Infrastructures con...
Conference Paper
Libraries create and preserve bibliographic data using the MARC family of standards to encode and interchange them. Aggregation and exposure of these data into the Semantic Web universe is a key issue in libraries and is approached on the basis of library data conceptual models. Examining the way that data are represented in each data model, as wel...
Article
Full-text available
Over the human life-span, seventeen years are an amount of time which marks the long transition from infancy into maturity. Definitely, conference maturity is not to be measured with the same metrics, but looking back in the areas of establishment and growth of the European Conference on Research and Advanced Technology for Digital Libraries, start...
Article
Scientific research is moving towards multi-disciplinary, multi-institutional collaboration and therefore powerful tools and infrastructures based on interoperability principles are needed to support this trend. This paper introduces the special issue on the metadata for e-science and e-research of the International Journal on Metadata, Semantics a...
Conference Paper
Semantic Web technologies and Linked data form a new reference framework for libraries. The library community aims to integrate its data with the Semantic Web and as a result new library data models have been developed. In this context, significant research effort focuses on the alignment between the library models with relevant models developed by...
Article
Evaluation is a vital research area in the digital library domain, demonstrating a growing literature in conference and journal articles. We explore the directions and the evolution of evaluation research for the period 2001–2011 by studying the evaluation initiatives presented at 2 main conferences of the digital library domain, namely the Associa...
Conference Paper
The digital library evaluation field has an evolving nature and it is characterized by a noteworthy proclivity to enfold various methodological orientations. Given the fact that the scientific literature in the specific domain is vast, researchers require tools that will exhibit either commonly acceptable practices, or areas for further investigati...
Article
The management of cultural heritage metadata is a multifaceted process depending on the diversity and heterogeneity of the cultural objects, the structure of their collections and the information needs of the communities that generate, access and study them. This paper reports the results derived from the special track on metadata and semantics for...
Conference Paper
In recent years, the folksonomies were created and maintained in libraries and other information organizations alongside the traditional subject indexing systems. Folksonomies, consisting of tags, often express the “wisdom of the crowd”. Despite their weaknesses and unstructured form, they reveal the language of users or even the terminology of the...
Conference Paper
Scientific literature is vast and therefore the researchers need knowledge organization systems to index, semantically annotate and correlate their bibliographic sources. Additionally they need methods and tools to discover scientific trends and commonly acceptable practices or areas for further investigation. This paper proposes a clustering-based...
Conference Paper
Evaluation is a vital research area in the digital library domain, demonstrating a growing literature in conference and journal papers. In this poster we present the research trends that governed the field within the decade 2001--2010 in the JCDL and ECDL conferences. The DL evaluation literature was annotated using the domain ontology DiLEO, which...
Conference Paper
Full-text available
This paper presents a new metadata aggregation approach based on a mediating repository that intends to ensure the integrity, authenticity and semantic enrichment of metadata provided to Europeana by heterogeneous collections. Primary metadata are mapped to CARARE schema, a schema suitable for describing archaeological and architectural heritage as...
Conference Paper
Full-text available
During the last decades many information providers, such as libraries, have been collecting, organizing and delivering information in both print and digital format, forming a hybrid information environment. However, exploration of a hybrid information environment does not result in a unified seeking experience, which exploits most effectively the a...
Article
Digital library evaluation is a complex field, as complex as the phenomena it studies. The interest of the digital library society still remains vibrant after all these years of solidification, as these systems have entered real-life applications. However the community has still to reach a consensus on what evaluation is and how it can effectively...
Conference Paper
Full-text available
Nowadays, many libraries have developed social tagging services, after the considerable use of social tagging and deployment as key components of Web 2.0. Another set of libraries have enriched the search and indexing services of their OPACs with the folksonomy of Library Thing. The evaluation of these metadata (folksonomies) and further their expl...
Conference Paper
Full-text available
Nowadays, due to the growing development of eGovernment information systems, there is an increasing need to handle Public Sector Information (PSI) in a homogeneous way. Ontologies are currently a powerful tool to act as semantic reference models for the development of information systems and as semantic mediators for achieving interoperability. In...
Conference Paper
This paper presents Mopseus, a Fedora-commons based digital repository that focuses on preservation. An overview of the general architecture of the system is presented along with some more in-depth details of its semantic structures. Mopseus features dynamic RDF- based relations, a service for defining metadata schemas, a built-in RDBMS synchroniza...
Conference Paper
Full-text available
The wide use of a number of cultural heritage metadata schemas imposes the development of new interoperability techniques that facilitate unified access to cultural resources. In this paper, we focus on the ontology based semantic integration by proposing an expressive mapping language for the specification of the mappings between the XML-based met...
Article
Social tagging is one of the most popular of social media applications and has attracted the interest of a number of libraries and museums, which have developed services that facilitate user-community collaboration. This paper presents a methodology for the exploitation of social tagging in subject indexing, and explores that method through a case...
Conference Paper
Full-text available
Managing heterogeneous data is a challenge for cultural heritage institutions as they host and develop various collections with heterogeneous types of material, described by different metadata schemas. In this paper, we propose an expressive mapping language for the mapping of XML-based metadata schemas to CIDOC CRM. We also show how these mappings...
Article
Full-text available
Repository platforms offer significant tools aiding institutions to preserve the wealth of their information resources. This paper presents the data model as well as the architectural features of Mopseus, a digital library service, built on top of Fedora-commons middleware, designed to facilitate institutions to develop and preserve their own repos...
Article
This chapter presents how mobile phones nowadays can be used as a handy and always around medium to interact with information collections of both physical and electronic form. It presents their evolution into powerful computing devices capable of communicating with other computing infrastructures, like the World Wide Web, and assisting them in find...
Chapter
The advent of Internet technologies since decades ago has propelled distance learning drastically. In this modern world, knowledge develops so fast that the amount of intellectual information that needs to be learnt before it becomes obsolete again is so huge. Distance learning through the use of Internet technologies has the advantage of being abl...
Article
Full-text available
Social tagging aims to generate folksonomies through the users’ collaboration and activation. This paper is motivated by the trend of several libraries to adopt social tagging functionalities and presents a tag analysis study aiming to exploit a social tag collection for the benefit of the subject description of an academic library material. In thi...
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...
Book
Evaluation of Digital Libraries summarizes research and practice on both sides of the Atlantic and aims to answer the potential questions that both the theoretical and practical areas of digital library evaluation have posed during recent years. The book systematically presents aspects of participating communities, reasons and aims of evaluation, m...
Article
Full-text available
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...
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 par...
Article
Full-text available
Over recent years, there has been a worldwide growing need for interoperability among the systems that manage and reuse Public Sector Information. This paper explores the documentation needs for Public Sector Information and focuses on metadata interoperability issues. The research work studies a variety of public sector information metadata standa...
Article
Full-text available
The present chapter introduces digital library services' utilization through handheld devices, such as personal digital assistants (PDAs) and smartphones. It argues that handheld devices proliferation justifies the term digital library in terms of anywhere-anytime access, and retrieval and management of information. Furthermore, these devices const...
Conference Paper
Full-text available
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 pro...
Article
Full-text available
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...
Article
Full-text available
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 cha...
Conference Paper
Full-text available
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 prototyp...
Article
Full-text available
Digital library interaction evaluation has, by nature, a user centered perspective, which directs the scientific research to the benefit of the user and narrows the research parameters. In this paper we propose a new framework for the evaluation of interaction and we introduce the concepts of usefulness, usability and performance as the main contri...
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...
Article
Full-text available
Regarding the change of information seeking to a collaborative activity, DLs as dynamic information systems, have to adopt collaboration searching tools. This study investigates the degree of collaboration in information retrieval and the extent of collaboration tools usage in DLs. The collaborative tools of a prototype digital library are assessed...
Article
Full-text available
Digital library are complex information systems, comprised by core and value added services. The current study attempts to collect through a qualitative approach users’ opinions about the usage, usefulness and usability of DL value added services. Selected value added services from four DLs are related to the main stages of information life-cycle i...
Conference Paper
Full-text available
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)...
Article
Full-text available
Digital libraries (DLs) are new and innovative information systems, under constant development and change, and therefore evaluation is of critical importance to ensure not only their correct evolution but also their acceptance by the user and application communities. The Evaluation activity of the DELOS Network of Excellence has performed a large-s...
Article
Full-text available
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...