Sarantos Kapidakis

Sarantos Kapidakis
University of West Attica | TEIATH · Department of Archival, Library and Information Studies

About

113
Publications
11,770
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602
Citations
Citations since 2017
17 Research Items
207 Citations
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
2017201820192020202120222023010203040
Introduction

Publications

Publications (113)
Preprint
Full-text available
This study considers the expressiveness (that is the expressive power or expressivity) of different types of Knowledge Organization Systems (KOS) and discusses its potential to be machine-processable in the context of the Semantic Web. For this purpose, the theoretical foundations of KOS are reviewed based on conceptualizations introduced by the Fu...
Article
In this paper, Stamatoula Pylarinou with her supervisor Prof. Sarantos Kapidakis reports on an analysis of bibliographic data of the publications of Greek hospital personnel, conducted as part of Stamatoula’s doctoral research in the Department of Archive, Library and Museum Sciences at the Ionian University in Corfu, Greece. Using freely available...
Article
Full-text available
This study considers the expressiveness (that is, the expressive power or expressivity) of different types of Knowledge Organization Systems (KOS) and discusses its potential to be machine-processable in the context of the semantic web. For this purpose, the theoretical foundations of KOS are reviewed based on conceptualizations introduced by the F...
Chapter
Libraries have a long tradition on cataloging with consistency. Other domains try to follow their paradigm, but there are many challenges to be addressed. In this paper we examine the metadata design and implementation for the excavation of an archaeological site. We start by discussing with the excavation personnel, to understand the procedures an...
Conference Paper
Full-text available
In the international bibliography there are several surveys that focus on the design of information literacy programs, following the development of collaborations between schools and academic libraries. These surveys demonstrate the importance of such collaborations and the substantial contribution of academic libraries to the smooth transition of...
Chapter
Full-text available
Harvesting tasks gather information to a central repository. We studied the metadata returned from 744179 harvesting tasks from 2120 harvesting services in 529 harvesting rounds during a period of two years. To achieve that, we initiated nearly 1,500,000 tasks, because a significant part of the Open Archive Initiative harvesting services never work...
Conference Paper
Harvesting tasks gather information to a central repository. We studied 880560 harvesting tasks from 3446 harvesting services in 354 harvesting rounds during a period of 15 months, of which 382705 failed and the remaining tasks occasionally returning fewer records. A significant part of the Open Archive Initiative harvesting services never worked o...
Conference Paper
Full-text available
The rapid increase of publications both in print and digital form raises costs while academic libraries budgets are constantly decreasing. At the same time academic libraries cannot ignore the continuous spread of open geographical data on the web. The construction of policies consist a major and substantial function for any library in order to dev...
Article
Extracting useful information while processing bibliographic data for hospital personnel from scientific publishing could help hospital librarians enhance services and participate in the decision-making processes of the hospital. Information needs assessment of hospital managers could help hospital librarians provide more personalized information s...
Conference Paper
Full-text available
Computer services are normally assumed to work well all the time. In this work we examined the operation and the errors of metadata harvesting services and tried to find clues that will help predicting the consistency of the behavior and the quality of the harvesting. The large number of such services, the huge amount of harvested information and t...
Article
The aim of this paper is to explore whether in today's changing landscape libraries institutional repositories are used, in order to develop collections of locally produced geospatial data. Furthermore, this study will explore the use of policies in developing geospatial collections in order to reveal whether this tool is necessary for librarians w...
Article
Scientific literature focuses on facilitating communication among researchers. Many studies have been conducted to compare effectiveness, coverage, and performance among databases available to researchers and/or librarians. In this study, the authors compared MEDLINE/PubMed, Scopus, Web of Science (WoS), and Google Scholar performance regarding sea...
Article
Scholarly publishing of hospital personnel is a way of highlighting research and clinical work. It is a result of intense clinical practice and it includes data evaluated by the scientific community. Usually, bibliographic data are used to assist information extraction, information dissemination as well as scientific excellence. In this study we us...
Conference Paper
Full-text available
The DBpedia ontology forms the structural backbone of DBpedia linked open dataset. Among its classes dbo:Building and dbo:HistoricBuilding entities, hold information for thousands of important buildings and monuments, thus making DBpedia an international digital repository of the architectural heritage. This knowledge for these architectural struct...
Conference Paper
Full-text available
Metadata harvesting is used very often, to incorporate the resources of small providers to big collections. But how solid is this procedure? Are the metadata providers reliable? How often are the published metadata updated? Are the updates mostly for maintenance (corrections) or for improving the metadata? Such questions can be used to better predi...
Conference Paper
Full-text available
This paper presents a knowledge representation document model, which is based on the classic information retrieval vector model. The aim of this paper is to reduce the level of complexity of the classical vector space model (VSM) and to simplify it by presenting an implementation on the plane. Furthermore, a comparison of tf-idf weighting scheme wi...
Article
The proliferation of geospatial data demands the engagement of information organizations, such as academic libraries, for their management and diffusion. The purpose of this paper is to reveal issues related to the development of geospatial collections and explore their efficient use as required by the current information environment. Thus, a rese...
Article
Existing literature on Geographic Information (GI) and libraries points out that American and Canadian librarians have long been aware of the intimate relationship between geospatial data and libraries. In Europe, though, there is almost no literature to this regard, and academic libraries that offer GI services are the exception. Despite the fact...
Article
Full-text available
The vehicle to represent Knowledge Organisation Systems (KOSs) in the environment of the Semantic Web and linked data is the Simple Knowledge Organisation System (SKOS). SKOS provides a way to assign a Uniform Resource Identifier (URI) to each concept, and this URI functions as a surrogate for the concept. This fact makes of main concern the need t...
Conference Paper
This paper investigates the context in which a special library of academic standards could contribute to the work of Secondary Education teachers towards the strengthening of their students’ information skills as a preparation for their smoother transition to University-Level research environment. We describe the collaboration of the scientific lib...
Article
Full-text available
Computer services are normally assumed to work well all the time. This usually happens for crucial services like bank electronic services, but not necessarily so for others, that there is no commercial interest in their operation. In this work we examined the operation and the errors of information services and tried to find clues that will help pr...
Conference Paper
Full-text available
We designed, implemented and tested enhancements allowing the transmission of richer information from sources, during the metadata transfer, to cater for the case that the desired harvested metadata format evolves. The new functionality will be useful in applications like disconnected health assistive environments that occasionally go online so tha...
Conference Paper
Full-text available
The quality of the data and metadata affects the interoperability of the collections and the quality of all processing. Our metadata quality metric helps the metadata harvester collection administrators detecting and improving the weaknesses of their metadata, and harvesters locating the most problematic collections, in terms of metadata quality, a...
Conference Paper
Full-text available
The emergence of technology today favours both the creation and the publication of large volumes of information, of which the geospatial information constitutes a noteworthy part. Lots of libraries worldwide develop geographical collections and provide related services to their patrons; Greek libraries have not taken similar actions so far. This pa...
Book
This book constitutes the proceedings of the 19th International Conference on Theory and Practice of Digital Libraries, TPDL 2015, held in Poznań, Poland, in September 2015. The 22 full papers and 14 poster and demo papers presented in this volume were carefully reviewed and selected from 61 submissions. They were organized in topical sections nam...
Conference Paper
Full-text available
Today, that the access in a wide variety of data and services is possible more than ever, GIS patrons need libraries’ further engaged with them, meeting their increasingly diverse education/research needs. Patrons are the core element in an organization that provides services and that is why our research approached the Greek GIS users. Excluding so...
Conference Paper
Full-text available
Today, that the access in a wide variety of data and services is possible more than ever, GIS patrons need libraries " further engaged with them, meeting their increasingly diverse education/research needs. Patrons are the core element in an organization that provides services and that is why our research approached the Greek GIS users. Excluding s...
Article
Full-text available
Purpose – This paper aims to propose a toolset that enables individual digital collections owners to satisfy the requirements of aggregators even in cases where their IT and software infrastructure is limited and does not support them inherently. Managers of repositories/digital collections face the challenge of exposing their data via Open Archive...
Conference Paper
Full-text available
This work presents the formulation of a conceptual model for architectural heritage, a meta-model, which attempts to encompass the common aspects of diachronic architectural theories for architecture composition. The model incorporates definitions of some of the essential theories that represent the underlying conceptualization of the information c...
Article
Full-text available
The aim of this study was to investigate the information seeking and searching behavior of Greek physicists and especially astronomers. More specifically, it attempted to shed a light on students' information needs and their familiarity with different ways of satisfying them. The interest for this research emanated from a lack of relative studies a...
Chapter
The digital era has brought a change to the information world. Digital information is collected in repositories, is described with metadata and is disseminated through digital libraries. But many issues are in debate, even what in fact constitutes a digital object, how to create, store and handle complex digital objects and how to preserve the digi...
Conference Paper
Full-text available
The focus of our study is zero-hit queries in keyword subject searches and the effort of increasing recall in these cases by reformulating and, then, expanding the initial queries using an external source of knowledge, namely a thesaurus. To this end, the objectives of this study are twofold. First, we perform the mapping of query terms to the thes...
Article
Full-text available
This paper presents a policy decision tree for digital information management in academic libraries. The decision tree is a policy guide, which offers alternative access and reproduction policy solutions according to the prevailing circumstances (for example acquisition method, copyright ownership). It refers to the digital information life cycle,...
Conference Paper
Full-text available
In days of global economic distress, libraries implementing geospatial collections and GIS services must ensure that users will be able to make the greatest possible use of its capabilities and functions since business, public administration and environmental management strategies rely heavily upon geospatial information and technologies (Boxall, 2...
Conference Paper
Full-text available
While several surveys and studies focus on developing GIS services in libraries, however, there is no recent research concerning the data that academic libraries organize and offer to their users. This study tries to cover this gap, as we examine the types and forms of digital geospatial data held by academic libraries worldwide, after an investiga...
Conference Paper
The quality of the metadata affects the interoperability of the collections and the quality of all search results, and is important to the success of Europeana. It is not obvious how to define quality metrics, on different kinds of metadata and collections, and many different perceptions may be valid. Nevertheless, a metadata quality metric will he...
Conference Paper
The purpose of this study is to examine the Google facets, namely the suggestions found occasionally under the section "Searches related to" on the Google results page. The study focuses on whether they constitute good candidate terms for implementing expansion of queries submitted to databases. The thought behind this is to benefit from the Google...
Article
While several surveys and studies focus on developing GIS services in libraries, however, there is no recent research concerning the data that academic libraries organize and offer to their users. This study tries to cover this gap, as we examine the types and forms of digital geospatial data held by academic libraries worldwide, after an investiga...
Conference Paper
Full-text available
Οι βιβλιοθήκες βάσει των πολιτικών ανάπτυξης συλλογών που έχουν προσδιορίσει και ακολουθούν, συλλέγουν γεωγραφική πληροφορία και οργανώνουν γεωγραφικές συλλογές προσφέροντας πρόσβαση σε αυτές μέσω υπηρεσιών GIS, τις οποίες η κάθε βιβλιοθήκη αναπτύσσει βασισμένη σε προσεκτικό σχεδιασμό για την κάλυψη των αναγκών των χρηστών της. Σκοπός του συγκεκριμ...
Conference Paper
Full-text available
Τα τελευταία χρόνια μεγάλος όγκος γεωγραφικών δεδομένων διακινείται μέσω του διαδικτύου ως απόρροια των τεχνολογικών και κοινωνικών εξελίξεων που διέπουν τη σημερινή πραγματικότητα. Οι βιβλιοθήκες στο πλαίσιο του ρόλου και της αποστολής τους αφουγκραζόμενες τις ανάγκες των χρηστών τους, χρησιμοποιούν τα γεωγραφικά πληροφοριακά συστήματα (GIS) προκε...
Conference Paper
The paper aims at exploring the existence of geospatial collections and the GIS services in Greek academic libraries through a research in their websites. The initial hypothesis is that Greek academic libraries are not familiar with geographical information and services and therefore they have not developed efficient collections and services for th...
Conference Paper
What factors could affect the information seeking behavior of people despite of their being occupied in the same domain? This study aspires to shed some light on this question by examining, describing and exploring three aspects of information seeking behaviour of astronomers in Greece. The distinctive characteristic of this research is that an int...
Conference Paper
Full-text available
Europeana has put in a stretch many known procedures in digital libraries, imposing requirements difficult to be implemented in many small institutions, often without dedicated systems support personnel. Although there are freely available open source software platforms that provide most of the commonly needed functionality such as OAI-PMH support,...
Conference Paper
Full-text available
The widespread applications of GIS have challenged librarians worldwide to provide geospatial collections and services to their users. Despite the fact that collection development policies in digital environment have derived from the policies set down in traditional environments of information, geospatial data address a wide array of issues (metada...
Conference Paper
Encyclopaedias, despite their long presence in history, are still a useful tool towards general information retrieval. The paper in hand presents the methods of organization of access to the content of 3 widely used encyclopaedias; Encyclopedia Britannica, MedlinePlus and Wikipedia (English version). Despite the huge changes that have occurred by t...
Conference Paper
This study examines three aspects of information seeking behaviour of astronomers in Greece including a) the importance they place in keeping up-to-date with current developments b) the methods they depend on for keeping up-to-date and c) the information sources they mostly use. We adopted an intradisciplinary approach in order to investigate simi...
Conference Paper
Full-text available
Management and analysis of geospatial data evolved into a rapid developmental field nowadays. Scientific researches debate that 80% of economic and political decisions internationally, include indirect or direct geographic information while this is also present in everyday life under various applications (GPS, in PDA’s, in mobile phones). The digit...
Conference Paper
Full-text available
Sensor data generated by pervasive applications are very diverse and are rarely described in standard or established formats. Consequently, one of the greatest challenges in pervasive systems is to integrate heterogeneous repositories of sensor data into a single view. The traditional approach to data integration, where a global schema is designed...
Article
Full-text available
This study is part of our ongoing research on the field of conceptual query expansion, currently focusing on a user-centred approach relating to whether non-expert users could directly interact with various types of KOSs 1 . In previous phases, we studied the initial query formulation for given information seeking tasks. We mapped, both lexically a...
Article
Full-text available
This paper considers the quality of interoperability between digital libraries and possible metrics for measuring these. It presents the Dl.org Quality Core Model and the final results of a quality interoperability survey across some leading digital libraries. Quality is the most dynamic aspect of DLs, and becomes even more complex with respect to...
Conference Paper
Next generation display and indexing of cataloging records are mainly influenced from the development of the FRBR conceptual model. While the process for collecting all relevant bibliographic records in a catalogue to an FRBR work entity has been extensively developed and tested in non interactive (offline) environment, the corresponding process ha...
Conference Paper
The design of an Finite State Machine for human activity recognition heavily depends on the type, number and deployment of the sensors used. In this work we propose a tool that automatically creates the FSM, independently of the type and number of sensors or the environment where these are deployed in. This tool allows the users to define the areas...
Chapter
The digital era has brought a change to the information world. Digital information is collected in repositories, is described with metadata and is disseminated through digital libraries. But many issues are in debate, even what in fact constitutes a digital object, how to create, store and handle complex digital objects and how to preserve the digi...
Article
Purpose This paper aims to describe how approaches such as semantic based query rewritings and FRBR work entities composition could solve existing problems and improve the overall behavior of a mediated based meta‐search environment. Moreover, it aims to present meta‐Composer, which is a meta‐search engine without query failures that composes work...
Conference Paper
Full-text available
This study aims to investigate the query formulation and reformulation patterns such as generalisations, specifications, parallel movements and replacements with synonyms within the search procedure. Results showed that users reformulated their queries by using terms contained in the retrieved results while in the query reformulation process they m...
Conference Paper
Full-text available
Meta-searching library communities involve access to sources where metadata are invisible behind query interfaces. Many of the query interfaces utilize predefined abstract Access Points for the implementation of the search services, without any further access to the underlining meta-data and query methods. The existence of unsupported Access Points...
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
Full-text available
Today, with the existing technology and the globally available information, the art of information retrieval and dissemination is more complex than ever. The libraries, the traditional carrier of valid information, cannot restrict themselves to the material they physically contain in their own premises, but should be able to locate and provide more...
Conference Paper
Full-text available
This study aims at investigating query formulation and reformulation patterns within the search procedure focusing mainly on the semantic aspect of submitted queries. Results identified generalisations, specifications, parallel movements and replacements with synonyms; the parallel movement came first in the users' preferences for reformulating a q...
Conference Paper
Full-text available
The wide adoption of the Z39.50 protocol from the Libraries exposes their abilities to participate in a distributed environment. In spite of the specification of a unified global access mechanism from the Z39.50 protocol, unsupported Access Points result to query failures and/or inconsistent answers. A challenge to this issue is to substitute an un...
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...
Conference Paper
Full-text available
We present the results of a questionnaire survey for the access and reproduction policies of 67 digital collections in 34 libraries (national, academic, public, special etc) from 13 countries. We examine and analyze the above policies in relation to specific factors, such as, the acquisition method, copyright ownership, library type (national, acad...
Article
Full-text available
Meta-searching library communities involve access to sources where metadata are invisible behind query interfaces. Many of the query interfaces utilize predefined abstract Access Points for the implementation of the search services, without any further access to the underlining meta-data and query methods. The unsupported Access Points and its cons...
Article
Unsupported Z39.50 access points result to query failures and/or inconsistent answers, in spite of the protocol specification for a unified global access mechanism. A challenge to this issue is to substitute an unsupported access point with others, so that the most similar semantics to the original access point can be obtained. In this paper, we de...
Conference Paper
Full-text available
Evaluation of digital libraries assesses their effectiveness, quality and overall impact. To facilitate the comparison of different evaluations and to support the re-use of evaluation data, we are proposing a new logging schema. This schema will allow for logging and sharing of a wide array of data about users, systems and their interactions. We di...
Conference Paper
Full-text available
Evaluation of digital libraries assesses their effectiveness, quality and overall impact. To facilitate the comparison of different evaluations and for supporting the re-use of evaluation data, we are proposing a new logging schema that will account for all kinds of data about users, systems and the user-system interactions. We present a novel, mul...
Conference Paper
Full-text available
A graph of Access Points can be used as a tool in a number of applications such as, clarification and better understanding of their semantics and inter-relations, query transformations, more precise query formulation, etc. We apply a procedure to create a graph of the Access Points, according to their subset relationship, based on the official sema...
Conference Paper
Full-text available
The access and reproduction policies of the digital collections of fifteen leading academic and national digital libraries worldwide are classified according to factors such as the creation type of the material, acquisition method and copyright ownership. The relationship of these factors and policies is analyzed and quantitative remarks are extrac...
Conference Paper
Full-text available
The access and reproduction policies of the digital collections of ten leading university digital libraries worldwide are classified according to factors such as the creation type of the material, acquisition method, copyright ownership etc. The relationship of these factors is analyzed, showing how acquisition methods and copyright ownership affec...
Conference Paper
Full-text available
The wide adoption of the Z39.50 protocol from the Libraries exposes their abilities to participate in a distributed environment. In spite of the protocol specification of a unified global access mechanism, query failures and/or inconsistent answers are the pending issues when searching many sources due to the variant or poor implementations. The el...
Article
Full-text available
The digital content of libraries is different from commercial digital products, such as computer applications, software tools, and computer code or data streams, but they have the same sharing, reproduction and distribution digital properties and similar knowledge management problems. We examine the policies applied to commercial and library digita...
Article
Full-text available
The access and reproduction policies of the digital collections of 10 leading university digital libraries worldwide are classified according to factors such as the creation type of the material, acquisition method, copyright ownership etc. The relationship of these factors is analysed, showing how acquisition methods and copyright ownership affect...
Conference Paper
Full-text available
International trade negotiations among national governments and organizations are usually arduous and complicated. We propose a framework that supports government to government negotiation. With this framework, governments can keep track of previous negotiations us- ing a database of negotiation records in an electronic platform. Moreover, the fram...
Conference Paper
Full-text available
Collecting digital materials is time-consuming and can gain from automation. Since each source-and even each acquisition-may involve a separate negotiation of terms, a collector may prefer to use a broker to represent his interests with owners. This paper describes the Data Broker Framework (DBF), which is designed to automate the process of digita...
Article
Full-text available
The interest in the analysis of library user behavior has been increas-ing rapidly, since the advent of digital libraries and Internet. In this context, we analyze the queries posed to a digital library and recorded into the Z39.50 ses-sion log files and we construct communities of users with common interests, us-ing data mining techniques. One of...
Conference Paper
Full-text available
As more and more output from research institutions is born digital, a means for capturing and preserving the results of this investment is required. To begin to understand and address the problems surrounding t