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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

A meta-information structure for representing arguments in science text

Sallis, P. J. January 1979 (has links)
The research for this thesis has been concerned with defining and demonstrating the existence of certain semantic elements in English natural language science text which can be called metainformation. Meta-information is described as being the organisational-, rather than the conceptual properties of an author's 'message' in text. Conceptual information is that subject-related output from a document which readers assimilate or synthesise with their current state-of-knowledge. Meta-information reflects the organisation or structural format used by an author to present conceptual information for transfer from text to readers. The example used here to demonstrate the existence of meta-information, is a format for the presentation of empirical argument in science text. At its most simplep a meta-informational element could be a report section-heading like, INTRODUCTION, which describes (we assume), the contents of the subsequent text. At a lower level of analysis the phrase, 'This paper describes contains some semantic inference that the complete statement is one of an introductory nature; thereforep such a statement could be labelled as one of INTRODUCTION for meta-informational purposes. A 'grammar' or set of meta-informational elements, has been developed as a means of identifying certain semantic aspects of text. This grammar is based on some experimental evidence and the consensus view of readers and writers of science text who produced what has been called a conventional format for empirical argument presentation. An initial set of rules for implementing this grammar have also been developed. The rules have been tested for replicability with positive results. Although analysis of full text hasshown deviation from a 'conventional argument structure readers' summaries of the same text conform to this structure. Thus, a model of the phenomenQn of information transfer from text to readers, which includes a structural transformation process based on the experimental results, has been built. A computer simulation is given to demonstrate the model in an inter-active program-user system designed to produce summaries of whole text. The thesis is that evidence exists for the presence of meta-information in science text and that if a grammar appropriate to the kind of output information required by users is built, highly structured text could be produced so that the process of information transfer is optimised.
32

An evaluation of structured navigation for subject searching in online catalogues

Hildreth, Charles R. January 1993 (has links)
Understanding and improving subject searching in online library catalogues is the focus of this study. Against the backdrop of current research and developments in online catalogues an analysis of the problems and prospects for subject access in the expanding online catalogue is presented. Developments in recent information retrieval theory and practice are reviewed, and a case is made for a new model of information seeking and retrieval that more closely describes much of the subject searching and browsing activity actually conducted by library users. The center piece of this study is the experiment that was conducted using an experimental online catalogue developed to investigate and evaluate the effect of alternative browse and navigate search methods on overall retrieval effectiveness and subject searching performance. The objectives, methodology, and findings of this online catalogue search experiment are discussed. The primary aim of the experimental study was to evaluate the usability and retrieval performance of a pre-structured "navigation" approach to subject searching and browsing in library catalogues. The main hypothesis tested was that the provision and use of a navigation search and browse function would significantly improve overall OPAC retrieval effectiveness and the subject searching performance of OPAC users. The OPAC used in the study was designed and implemented by this author using the database management and retrieval software known as "TiNMAN", provided by Information Management & Engineering, Ltd. TINMAN employs an entity-relational database structure which permits the linking of any field in the stored bibliographic record to any other field. These linkages establish browse and navigation pathways among data fields ("entities") and citations to support guided but flexible searching and browsing through the collection by users. Thus, a rudimentary form of hypertext is provided for the users of the OPAC. The test database consisted of 30,000 Library of Congress MARC bibliographic records selected at random from all LC catalog records for publications through 1988 in the English language in the LC classes HB-HJ (Economics, Business, etc.). For each record, the verbal description of the assigned LC class number found in the printed schedules was added as a subject descriptor to augment the subject cataloging provided by the Library of Congress. Three different OPACs were tested for comparison purposes. The control OPAC lacked the navigation feature. The other two OPACs supported related-record navigation, one on title words only, the other on subject headings only. Searchers were encouraged to use the OPAC's features and search options in whatever manner they wished. Subjects in Group-I were permitted to navigate only on the subject headings from the controlled subject vocabulary assigned to the work cited (augmented by the verbal meanings of the Library of Congress class number). Subjects in Group-2 were permitted to navigate, but only from title words of the work cited and displayed. Navigating from one of these title words would result in the retrieval of all works whose titles had at least one occurrence of the selected word. Subjects in the control group were not permitted to navigate; that is, it was not possible for them to point to a selected data element in a displayed citation to move on to related terms or citations associated with that data element. The positive value of related-record navigation in improving subject searching in OPACs was not clearly determined. The navigation groups performed significantly better than the control groupon the first search task, but all three groups performed nearly equally well on the second search task. Navigation on subject headings or title keywords resulted in higher recall scores, especially among first time, novice users of the system, but precision suffered significantly in title-word navigation. In fact, the control group achieved higher precision scores on both search tasks. Navigation did not seem to aid subject searching performance after greater familiarity with the system was achieved, except perhaps to increase recall in persistent searches without much decrease in precision. Online bookshelf browsing seems to improve recall without a significant decrease in precision, and may be a more positive factor than navigation on either subject headings or title words.
33

User-based evaluation of academic digital libraries : case studies, Social Science Information Gateway, Art, Design Architecture & Media Gateway and the Electronic Journals Service of the University of Patras, Greece

Monopoli, Maria January 2005 (has links)
The purpose of this study was to evaluate the use of academic digital libraries from a user-oriented approach. For this purpose, end-users were invited to describe how they perceive and make use of academic digital libraries. The study was focused on Subject Based Information Gateways (SBIGs) and Electronic Journals Services. Specifically, two gateways were examined: the Social Science Information Gateway (SOSIG) and the Art, Design, Architecture and Media (ADAM) gateway, and an electronic journals service: the Electronic Journals Service of the Library and Information Service (LIS), the University of Patras, Greece. The target group was the academic community: academic staff, research staff and students (undergraduate and postgraduate). The research methods used were online questionnaires, face-to-face interviews and transaction logs analysis (TLA). Concerning the perception of academic digital libraries, users were invited: to provide the advantages and/ or disadvantages of electronic information over print, to compare the electronic and print version of a piece of information, to evaluate services or features as very important, important, or not important and to specify factors that would discourage them from accessing a digital library. Regarding the use of academic digital libraries, users were asked to specify: how frequently they use digital libraries, what reasons they use digital libraries for, what place they gain access from, what their preferred method of searching for information is, what their preferred method of storing and reading electronic information is, whether they use the support services provided, what types of information they want to be provided with and what the role of communication in a digital library is. The study concluded that end-users seem to appreciate the implementation of academic digital libraries. However, there are still some disadvantages that might prevent them from accessing them. A typical user would access them from their office or home for a variety of reasons, such as: for writing up a term paper/project or a thesis/dissertation, writing up a paper for publication, e. g. journal article or conference/workshop paper, keeping up with progress in the relevant subject area, supporting a lecture or for personal reasons. Concerning their search behaviour, they would adopt a relatively unsophisticated, simplistic approach to searching and limited use of Boolean operators or other commands. Notwithstanding their low search abilities, they would be reluctant to consult the online help function that could support their searches. Sometimes, they prefer to ask a person rather than attempt to use the online help. When they have identified information and want to read it, they print it out. But, when they want to store information for the future, they either print it out, or save it on disk. This information might differ in its formats, including electronic journals, reports and papers, digitised books, scholarly mailing lists and archives and educational software. Finally, some users would appreciate the opportunity to communicate with information scientists, authors, or other users who share the same interests with them. Some others emphasized the importance of the communication between users and digital library systems.
34

Information in nineteenth century England : exploring contemporary socio-cultural perceptions and understandings

Weller, Toni Danielle January 2007 (has links)
Historical interest in the information society and the tools and techniques of information processing and management has been the subject of much recent scholarship. In contrast, this research examines understandings of information from a social and cultural perspective and offers new insights into the chronology of `modern' information. The focus is on nineteenth century England and how contemporary society thought of and understood information. As a consequence of this, this work also investigates the role and manifestation of information according to these perceptions. The research explores perceptions from a variety of nineteenth century viewpoints, including etiquette and behavioural literature, Victorian periodicals, events such as the Channel Tunnel panics of the 1880s and discrete individual case studies. The thesis concludes that the nineteenth century formed the crux point between premodem understandings of information, and the start of what we would now term a period of modernity so far as information is concerned. The foundation of the research is nineteenth century published and archival material, contemporary newspapers, journals and private papers.
35

Open access and closed discourses : constructing open access as a 'development' issue

Haider, Jutta January 2008 (has links)
This thesis investigates the connection between open access - the free online availability and distribution of scientific and scholarly publications - and the 'developing world' from a post-development perspective. It takes a discourse analytical approach, drawing predominantly on Michel Foucault's understanding in discourse. It aims to answer the following questions: - Which notions of science, of development and progress, of knowledge as well as of information and technology are capitalised on in the open access debates and in which way are they shaped as a consequence? - Which discursive effects can be established, what are the results and of which kind are they? The thesis is divided into six chapters, chapters 2 to 5 are grouped into two parts. In the introduction (chapter 1) the general problem space is outlined, the connection between the open access movement and the 'developing world' is established; the research approach is briefly sketched, followed by a presentation of the research questions. Furthermore, the relevance of the study for Library and Information Science is discussed. Chapter 2 introduces the notion of discourse. It contains a discussion of the Foucauldian concept of discourse in relation to the notions of knowledge, truth, and power, as well as resistance, governmentality, and pastoral power. The manifestation of discourse in language is discussed with reference to Michel pecheux. The way in which discourses are dispersed unevenly in society is examined. It concludes with a presentation of the concept of the discursive procedure, which forms the basis for the analyses. Chapter 3 introduces post-development theory, specifically focusing on development discourse. It presents and problematises the concept of devt;lopment, of poverty and ignorance, as well as of science. The historical foundations of dev~lopmentdiscourse and the role of science and technology in it are examined. Chapter 4 investigates the representation of open access in its relation to development. It is based on a corpus consisting of 38 articles and similar publications and 5 statements and declarations. The latter are also examined from a genre perspective. The following discursive procedures are identified: (1) Leaving a blank or defining the undefinable: 111e elusiveness of the 'developing world', (2) Technologism and technological determinism, (3) Economism, (4) Scientific centralism and scientism, (5) Temporal distancing. It concludes with a discussion of the guiding metaphor, the divide. Chapter 5 investigates how open access is debated in the context of development. It draws on a two-week long email debate organised by a development institution in 2006. 146 postings by 49 participants are included in the analysis. The following discursive procedures are identified: (1) Technologism, (2) The role of the profession: mediation, translation, and control, (3) Rural people and the lack of education, (4) Developmentalism and antidev~ lopmentalism: Positioning oneself in and against development. It concludes with a discussion of the guiding metaphor, the barrier, as well as ofidentity construction. The concluding chapter 6 is concerned with providing a sum-up of the analyses with a view to answering the research questions. It considers a possible future for the open access movement in its relation to the 'developing world' and concludes with a brief discussion of issues relevant for future research. The main findings suggest that the 'developing world' is constructed around the coordinates provided by mainstream development thought. Open access is inserted into its discursive repertoire as a problem of development, a tool for its delivery, and its measure. The dominant understanding of information adheres to a sender/receiver model. However, ruptures occur in significant places. This requires a partial re-positioning of the way in which development is framed and of open access' role in it.
36

A model of scientists' information seeking and a user-interface design

Sadeh, Tamar January 2010 (has links)
Information systems that are available today do not optimally address the information-seeking behaviour of scholars, particularly those who belong to scientific communities; as a result, scholarly discovery is often cumbersome and incomplete. The hypothesis of this study is that an information-seeking system that is designed to address the nature of scholarly materials and the information seeking behaviour of scholars, particularly the members of one scientific community, will increase the effectiveness of the scholars’ searches and enable them to find and obtain relevant materials with greater ease and precision than current practices do. The information-seeking behaviour and search practices deployed by high-energy physics (HEP) researchers are explored through a series of interviews and observations. More than 2,100 responses obtained from a HEP survey are also examined; in particular, the participants’ open-ended responses are analysed. On the basis of qualitative and quantitative research regarding the characteristics of HEP scientists and their information-seeking practices, a set of six personas, representing typical members of the HEP community, is constructed. An original model is developed that leverages existing models of information behaviour, information seeking, and information searching and reflects the full pectrum of active information-seeking and information-searching practices of HEP scholars and the nature of the data that these researchers seek. The model is then evaluated by means of seven scenarios involving the personas constructed earlier. On the basis of the information-seeking model, a software user interface is designed as the future interface for the HEP INSPIRE information system. The user-interface design is corroborated through the model, and the personas are used to evaluate the design. Methods are suggested for long-term quantitative and qualitative monitoring of the ways in which this design supports HEP researchers. It is argued that the proposed user interface, which provides an information environment that accommodates the information-seeking practices of the HEP community in a friendly and efficient manner, will support HEP academic research—and research of other scholarly communities that share some of the HEP community’s characteristics—by shortening the search process and improving the findability of quality materials. This thesis contributes to the body of information-science knowledge in the novel modelling of information-seeking behaviour of a well-defined scientific community, the use of personas for the modelling, and the concretization of the model into a new user-interface design.
37

Knowledge based information retrieval : a semiotic approach

Karamuftuoglu, H. Murat January 1998 (has links)
The overall objective of this study is to analyze the document retrieval process and the main information retrieval (IR) concepts from the point of view of semiotics and design retrieval mechanisms based on the findings of the semiotic analysis of the retrieval situation. Semiotics is a discipline which studies 'sign systems' and how signs are exchanged in communication. The semiotic view of IR interaction presented in this dissertation views document retrieval as a kind of human communication process taking place in a social and cultural realm. The most important result of the semiotic model developed is the explication of the distinction between the knowledge production and transfer functions of document retrieval. The consequence of this finding is the conceptualization of the retrieval process as a dynamic and complex interplay between knowledge production and transfer tasks. It is hypothesised that, in the case of knowledge production, users of retrieval systems are interested in exploring new areas of the document collection which are not a priori known. Two knowledge based systems are developed based on the Okapi probabilistic retrieval system. The purpose of the retrieval systems designed is posited, in general terms, as to suggest the users new search areas of potential interest. This is achieved by treating the Inspec thesaurus as a semantic network, and applying a heuristic spreading activation technique to generate clusters of terms linked in the Inspec thesaurus. Each cluster or batch of terms is conceived as representing a part of the general search area defined by the initial user search terms. The main design objective here is to enable the user to identify new search areas from the term information contained in the batches. Two evaluation experiments were carried out with real users who had real information needs to test whether the batches were actually effective in defining search areas related to the original user queries and whether they were useful in pointing new areas which were potentially relevant to the users. A number of hypotheses related to the retrieval effectiveness of the knowledge based systems designed were also tested in the experiments. The main findings of the experiments indicate that: • the batches were useful in representing search domains relevant to the users' queries • in many cases the batches represented new ideas or new search domains to the users • the knowledge based systems had similar retrieval effectiveness in terms of precision as the Okapi system.
38

Effectiveness of Malaysian agricultural libraries

Majid, M. Shaheen January 2000 (has links)
Evaluation studies can help libraries to find out their strengths and weaknesses and use this knowledge for re-orienting their collections, services and facilities to effectively meet the information needs of their users. The purpose of this study was to explore the information needs and seeking behaviour of agricultural scientists in Malaysia and how effectively their needs are satisfied by their libraries. The study investigated some major factors that were considered important in effectively meeting the information needs of these scientists. Five major agricultural institutions in Malaysia participated in the study. Data was collected through two questionnaires and follow-up interviews with selected respondents and library staff. The user survey questionnaire provided data on information needs and seeking behaviour of respondents, their assessment about the adequacy of library collections, services and facilities, and their overall perceptions about library effectiveness. The library survey questionnaire furnished data from the participating libraries on their manpower, budget, collections, physical resources, library services, and resource sharing activities. The population of the study comprised 1,328 individuals. Proportionate stratified random sampling technique was used to generate random samples. A total of 332 questionnaires were distributed and 234 useable questionnaires were received back with an overall response rate of 70.5 percent. The study found that research and review articles were the most preferred sources for getting up-to-date information. Interaction . with professional colleagues was also considered important for information exchange. Libraries were more extensively used during two important stages of research, i.e., proposal development and report writing. Although a majority of the respondents personally visited their library they, however, sent their junior researchers andlor para-professionals for getting photocopies of articles, checking out books or getting information from the sources already known to them. The use of IT-based information sources and facilities was very low, although a majority of the respondents possessed reasonably good computing skills. Among the Internet applications, e-mail was the most popular while other Internet-based sources and facilities were used infrequently. A positive relationship was found between perceptions about library effectiveness and assessment of participants of the adequacy of library collections, equipment and physical resources. Other factors having a positive impact on the perception about library effectiveness were: involvement in the selection of library materials; notification of current materials; adequate promotion; convenient library location; staff attitude; and participation in user education programmes. The level of resource sharing among Malaysian libraries was quite high as nearly 74 percent of the interlibrary loan and document delivery requests of the participating libraries were met locally. However, only a minimal resource sharing was found among the participating libraries and libraries in the ASEAN countries. Although the participating libraries agreed in principle to participate in a resource sharing scheme, they felt that it should be the prerogative of the participating library to decide its level of co-operation and with which library to share its resources. It means that these libraries were in favour of a "loose" library co-operation network. A big difference was found between the number of document delivery requests made by these libraries to international sources and the number of such requests received by them from overseas, confirming one-way flow of information. Most of the document delivery requests were made to the BLDSC. Malaysian agricultural scientists, as compared to scientists in developed countries, made considerably less number of interlibrary loan and document delivery requests. A positive relationship was found between the availability of funds in research projects for literature procurement and the number of document delivery requests made. The study concludes that agricultural libraries in Malaysia were to some extent meeting the information needs of their scientists, although a disparity among these libraries was quite evident. However, the financial crisis of 1997 has severely affected the performance of these libraries. Library collections, services and facilities considered reasonable at the time of this study may quickly become inadequate due to the lack of funds to sustain them. Therefore, agricultural libraries in Malaysia need to develop appropriate strategies for surviving in the rapidly changing environment. Major recommendations of the study are: development of a formal resource sharing scheme for agricultural libraries in Malaysia, putting holdings information of these libraries on the Internet to facilitate resource sharing, making subscriptions to full-text electronic journals, more library co-operation among ASEAN countries, and the conduct of intensive user education programmes.
39

Modelling music : a theoretical approach to the classification of notated Western art music

Lee, Deborah January 2017 (has links)
The classification of notated Western art music is a perennial issue. This thesis analyses and models the knowledge organization of notated Western art music in order to elucidate a theoretical understanding of these classification issues and to offer new ways of viewing music classification in the future. This thesis also considers how music classification contributes to developments in general knowledge organization and compares the classification of Western art music across the library and information science (LIS) and music domains. The research is conducted using a number of analytical techniques, including examining music knowledge organization discourse, analysing examples of LIS classification schemes, unpicking discussions of classification in the music domain and analysing composer worklists in the music domain. After ascertaining how music classification fits into theories of faceted classification, three important facets of music are identified: medium, form and genre, and a quasi-facet of function. These three facets are explored in detail over five chapters: the binary vocal/instrumental categorisation; classifying numbers of instruments or voices, accompaniment, arrangements and “extreme” mediums; classifying musical instruments; classifying musical forms and genres; and the quasi-facet of function. Five resulting models of music classification are presented. Model 1 demonstrates the complexities of classifying musical medium, including the interlinked relationships between different parts of musical medium. Model 2 offers a solution to LIS classification’s largely binary view of vocal and instrumental categorisation by suggesting a novel new category: “vocinstrumental”. Model 3 illuminates the entrenched dependencies between facets of music, highlighting one of the structural issues with LIS classifications of music. Model 4 offers an original structure of music classification, proposing a simultaneous faceted and genre-based system. Model 5 compares classification in the music and LIS domains, offering a novel way of considering domain-based classification by codifying various types of relationships between the LIS and domain classifications. This thesis also contributes to the theory and practice of knowledge organization in general through the development of novel frameworks and methodologies to analyse classification schemes: the multiplane approach, reception-infused analysis, webs of Wirkungs (connections) between classification schemes and stress-testing.
40

Theory and practice in the analysis of information policy in the digital age : a case study on the formulation of the European Directive on the legal protection of databases

Turner, Paul January 1999 (has links)
This thesis is concerned with the academic study of information policy and aims to improve theoretical and methodological approaches for the analysis of complex information policy environments. In conducting a casestudy on the formulation of the European directive on the legal protection of databases. up to its adoption in March 1996. the research aims to explore the ways in which copyright and information issues were framed. and solutions shaped by the process of formulating policy responses to them at the European level. At the substantive level the research examines the legal issues arising in the protection of databases in Europe and describes and explains the role of human. organisational and contextual factors in shaping the content of the directive as finally adopted. At the methodological level the research examines the utility of a re-interpreted process model of policy-making for providing a coherent framework within which to conduct analysis of this complex information policy issue. At the theoretical level the research aims to use the casestudy findings to generate insights for the academic study of complex (European) information policy environments. The literature review begins by examining the development of information policy and considers the main problems that have inhibited the development of a coherent approach to information policy studies from within the information science tradition. It examines the reinterpreted process model of policy-making and presents it as a heuristic device with which to conduct the casestudy. The literature review also examines in detail the development of copyright policy at the European level and identifies the expansion of protection that has taken place. In particular. the impact of digital information and communication technologies on copyright regimes is considered. The literature review also outlines the emergence of the European Union(EU). and considers how the EU has shaped the characteristics of. and interactions between policy actors operating in the European policy-making environment. The casestudy analysis is conducted in two parts consisting of a detailed analysis of documentary evidence and forty in-depth semi-structured interviews with policy actors directly involved in the formulation of the directive. In deploying the re-interpreted process model the analysis is divided into two overlapping phases linked by the publication of the Commission's formal directive proposal in 1992. To ensure that the casestudy findings can be used in a more generalisable manner the analysis addresses the links between the formulation of the database directive and the wider context of European copyright and information policy-making in the digital age. Following the documentary and interview analysis the research findings are discussed and interpreted. The thesis concludes that at a substantive level the formulation of European copyright policy is problematic and tends towards a strengthening of protection in favour of right shoulders. In the digital environment the implications of this for other areas of information policy are also shown to be of concern. At the methodological level the re-interpreted process model is highlighted as useful in sensitising analysis to sources of complexity in the formulation process and for providing a coherent framework within which to study them. At the theoretical level the thesis enhances understanding of (European) information policy processes and provides some useful insights for academic information policy studies.

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