Relevant bibliographies by topics / OPACs

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'OPACs'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "OPACs"

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Kapoor, Kanta, and O. P. Goyal. "Web‐based OPACs in Indian academic libraries: a functional comparison." Program 41, no. 3 (July 31, 2007): 291–309. http://dx.doi.org/10.1108/00330330710774165.

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PurposeThe paper seeks to provide a comparative analysis of the functionality of five web‐based OPACs available in Indian academic libraries.Design/methodology/approachSame‐topic searches were carried out by three researchers on the web‐based OPACs of Libsys, VTLS's iPortal, NewGenLib, Troodon, and Alice for Windows, implemented in five academic libraries in India. Their functionality was compared using criteria selected from the literature on OPAC searching.FindingsThe web‐based OPACs investigated offered a range of facilities for searching by author, title, control number and by keywords. Federated searching across several e‐collections was limited.Originality/valueThis paper should be a useful source of information to librarians who are planning to introduce web‐based OPACs and also for software vendors who wish to improve the functionality of their products.
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Chilimo, Wanyenda. "NEXT-GENERATION CATALOGUES: HOW ARE THE ACADEMIC LIBRARIES IN KENYA FARING?" Mousaion: South African Journal of Information Studies 32, no. 3 (September 30, 2016): 93–118. http://dx.doi.org/10.25159/0027-2639/1679.

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The library catalogue has changed over the years from a card catalogue to its electronic successor, the Online Public Access Catalogue (OPAC), to what is called the next-generation library catalogue, sometimes referred to as the library 2.0 catalogue or ‘the third-generation catalogue’. The purpose of this study was to investigate the current state of catalogues in academic libraries in Kenya and to evaluate whether these libraries have incorporated features of the next-generation catalogues in their OPACs. The study applied a checklist of features commonly identified as characteristics of the next-generation catalogue to examine whether the OPACs of university libraries in Kenya are comparable to the next-generation library catalogue. The findings of the study showed that libraries in Kenya have made some progress towards transforming their OPACs to the next-generation catalogue but have not reached the ideal. None of the OPACs has all the features evaluated. Progress has been made with features, such as enhanced content, simple keyword search and faceted navigation. However, none of the catalogues has federated searching capabilities. The study also found out that close to half of the libraries which have their OPACs available online are using Koha as their Library Management System (LMS). This article provides valuable information for library policy makers interested in modernising their catalogues or acquiring discovery tools for their institution. The article may also be a useful tool for evaluating OPACs modules of the integrated LMS, especially for libraries that are in the process of selecting a suitable LMS.
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Martin, Lynne M. "Evaluating OPACs, or, OPACs Are Reference Tools, Too!" Reference Librarian 17, no. 38 (August 7, 1992): 201–20. http://dx.doi.org/10.1300/j120v17n38_22.

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Klauß, Henning. "RDA: Folgen für die Katalogisierung und die OPAC-Gestaltung." Bibliotheksdienst 47, no. 3-4 (April 3, 2013): 225–30. http://dx.doi.org/10.1515/bd-2013-0024.

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Zusammenfassung: Das Regelwerk RDA wird einige Veränderungen für den Katalog von Bibliotheken erbringen, die für Benutzer hilfreich sind. Dieser Fortschritt wird auch für die Katalogisierer und die Gestaltung des OPACs Fortentwicklungen erzwingen. Hierfür muss die in Bibliotheken verwendete Software sowohl hinsichtlich Katalogisierung wie OPAC fortentwickelt werden, was anhand von Beispielen gezeigt wird.
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Suaiman, Mubarak, and Jack Meadows. "Icons and OPACs." New Library World 96, no. 4 (July 1995): 11–14. http://dx.doi.org/10.1108/03074809510146895.

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Blecic, Deborah D., Nirmala S. Bangalore, Josephine L. Dorsch, Cynthia L. Henderson, Melissa H. Koenig, and Ann C. Weller. "Using Transaction Log Analysis to Improve OPAC Retrieval Results." College & Research Libraries 59, no. 1 (January 1, 1998): 39–50. http://dx.doi.org/10.5860/crl.59.1.39.

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This OPAC transaction log analysis study compared data derived from two sets of logs within a six-month period. Analysis of the first set of data revealed that users experienced difficulty with basic searching techniques. The OPAC introductory screens were simplified and clarified to help users improve search success rates. The second set of data, analyzed after screen changes had been made, showed statistically significant differences in search results. Regular monitoring of OPACs through transaction log analysis can lead to improved retrieval when changes are made in response to an analysis of user search patterns.
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Moraes, Marcos Antonio de, Zoraide Aparecida Gasparini, and Leda Maria Araújo. "Catálogo online em bibliotecas públicas municipais do estado do Paraná." Informação@Profissões 9, no. 1 (May 22, 2020): 108. http://dx.doi.org/10.5433/2317-4390.2020v9n1p108.

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Introduão: No contexto das bibliotecas, sejam públicas ou de outros tipos, o catálogo sempre desempenhou importante papel nas tarefas de localizar, descrever e inventariar os conteúdos informacionais. Atualmente, com as amplas possibilidades de uso dos Online Public Access Catalogs, ou simplesmente OPACs, as bibliotecas podem utilizar essa ferramenta, não mais somente para recuperar, descrever ou inventariar os acervos, mas também como importante canal de divulgação e de comunicação com usuários reais e potenciais das bibliotecas. Entretanto, o contexto das bibliotecas públicas brasileiras impõe barreiras à adoção dos OPACs, visto que os custos de compra e manutenção de softwares voltados para essa finalidade não são considerados como prioritários para muitas dessas instituições. Objetivo: Esta pesquisa tem como objetivo investigar a situação das bibliotecas públicas municipais das maiores cidades do estado do Paraná, no que se refere a adoção ou não dos OPACs, observando ainda, quando o caso, quais softwares e funcionalidades existentes nos OPACs. Metodologia: Levando-se em consideração os objetivos propostos para esse trabalho, trata-se de uma pesquisa do tipo exploratória com abordagem tanto quantitativa quanto qualitativa. Resultados: Percebeu-se que metade das 20 cidades pesquisadas, ou seja, 10 cidades mantêm OPACs, ao passo que em outras 10 cidades não foi percebida a existência dessa ferramenta. Conclusões: Destaca-se de maneira positiva, o esforço conjunto liderado pela Biblioteca Pública do Paraná, que é um órgão estadual, no que se refere a oportunizar que algumas cidades paranaenses possam utilizar o software Pergamun para prover acesso público online aos catálogos de suas bibliotecas. Da mesma maneira que Londrina, Araucária, Arapongas e Cambé, cujas bibliotecas públicas municipais utilizam diferentes softwares para administrar seus OPACs. Todavia, a ausência dos OPACs em bibliotecas públicas de 10 das maiores cidades do Paraná, dentre elas a capital Curitiba, indica que há muito que avançar no sentido de oportunizar o uso dessa importante ferramenta.
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Osborne, Hollie M., and Andrew Cox. "An investigation into the perceptions of academic librarians and students towards next-generation OPACs and their features." Program 49, no. 1 (February 2, 2015): 23–45. http://dx.doi.org/10.1108/prog-10-2013-0055.

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Purpose – The purpose of this paper is to determine whether features of next-generation Online Public Access Catalogue (OPAC) interfaces are useful and intuitive to users who have different levels of searching ability. In addition, it investigates whether there is a difference between librarians’ and students’ preferences for specific features. Design/methodology/approach – The research is based on 18 semi-structured interviews conducted in July 2012 with three groups of library users from The University of Sheffield: librarians; Master of Arts Librarianship students; and a group of other post-graduate students. Findings – Overall, this study suggests that while the next-generation catalogue interfaces and features are useful, they are not as “intuitive” as some previous studies have claimed. Interviewees appeared to prefer the searching and browsing options over the Web 2.0 features. Both librarians and students have similar opinions regarding the usefulness of next-generation OPAC features, but preferences are complex. Research limitations/implications – The study is based on one institution, and the disciplinary background of the post-graduate students was limited. Practical implications – Promoting next generation OPACs and explaining their features to users is essential. Originality/value – The paper adds to the understanding of users’ preferences in relation to next-generation OPACs, locating the findings of the current findings firmly in the context of previous literature.
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Tedd, Lucy A. "OPACs through the Ages." Library Review 43, no. 4 (June 1994): 27–37. http://dx.doi.org/10.1108/00242539410063579.

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Long, Bradley A. "OPACs and e-Journals." Journal of Electronic Resources in Medical Libraries 3, no. 3 (August 14, 2006): 89–95. http://dx.doi.org/10.1300/j383v03n03_06.

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Dissertations / Theses on the topic "OPACs"

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Berggren, Mirja. "OPAC på Internet : möjligheter för sökning på skönlitteratur. En jämförelse mellan en bokhandel på Internet och fem OPACs." Thesis, Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20741.

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The aim of this master thesis is to investigate how the OPACs Online Public Access Catalogue used by public libraries have adapted the features and possibilities offered by online catalogues, for the purpose of searching for fiction. This is done by comparing five OPACs to Amazon.com, an online bookstore. The questions investigated are: Have the OPACs developed from the principles of the card catalogue and adapted to the features and possibilities offered by online catalogues, when searching for fiction? Can the library catalogue provide the same features as Amazon.com, when searching for fiction? How do the OPACs use the resources that online catalogues provide when searching for fiction, compared with Amazon.com? The thesis is based on two qualitative studies. The first study presents five OPACs from different library systems and examines which features they have in common with Amazon.com. The second study examines how five public libraries use the potential features of their OPACs. The OPACs have started to develop features and possibilities that online catalogues provide but they have not completely abandoned the principles of the card catalogues. Most OPACs still only allow keyword searches and do not support browsing through genres and subjects. They do not offer a designated area for fictional search only. So far the libraries have not developed the OPACs potential to include additional information such as covers and reviews. The users have some possibilities to interact with the OPACs to make them more useful for their personal needs. Nr 63 Maria Broman: Ungdomar och nättidningsläsning En kvalitativ studie av nio gymnasieungdomars förhållande till dagstidningar på Internet Adolescents and Net Newspaper Reading A Qualitative Study of Nine High School Students' Relations to Newspapers on the Internet This Master Thesis deals with nine high school students' relations to, and reading of, newspapers on the Internet. In the context of the Internet and net newspapers, adolescents represent a group that is particularly interesting to study. For instance, they have a positive attitude towards Net newspapers and they are the first generation to grow up with the Internet and thereby associated technology. Moreover, mass media is an important part of young peoples' daily lives. A qualitative approach was used, resulting in interviews with four girls and five boys. The study reveals that the adolescents visit a newspaper site primarily to read the news and not to utilise the interactive services available. Highly valued aspects of Net newspapers are that they are free of charge and easily accessible from home. Nevertheless, the informants almost exclusively read Aftonbladet, the singularly most popular alternative on the Net. Furthermore, it was found that Internet newspaper reading has a natural place in the adolescents' lives for the time being, a habit connected to other activities such as surfing the Net and practising sports and music. However, traditional print newspapers remain the basis for newspaper reading, as the Internet is still seen as a complement. No clear evidence of continued long-term Net newspaper reading emerged, and the development will likely depend on the adolescents' personal future situations as well as the technological progress in general.
Uppsatsnivå: D
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Greifeneder, Elke. "Effektivität und Effizienz von Online-Hilfesystemen in deutschen Universitäts-OPACs." kostenfrei, 2007. http://edoc.hu-berlin.de/oa/books/reUIxmZgrpGw/PDF/27K5h8XoLOcfo.pdf.

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Merget, Iris. "Die Gestaltung von Benutzerschnittstellen mittels Online-Hilfefunktionen in OPACs : Stand, Trends, Perspektiven /." Saarbrücken : Univ. des Saarlandes, 1993. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=018907728&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Slack, Frances Elisabeth. "OPACs : using enhanced transaction logs to achieve more effective online help for subject searching." Thesis, Manchester Metropolitan University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293574.

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Tinker, Amanda Jayne. "Deriving and applying facet views of the Dewey Decimal Classification Scheme to enhance subject searching in library OPACs." Thesis, University of Huddersfield, 2005. http://eprints.hud.ac.uk/id/eprint/7482/.

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Classification is a fundamental tool in the organisation of any library collection for effective information retrieval. Several classifications exist, yet the pioneering Dewey Decimal Classification (DDC) still constitutes the most widely used scheme and international de facto standard. Although once used for the dual purpose of physical organisation and subject retrieval in the printed library catalogue, library classification is now relegated to a singular role of shelf location. Numerous studies have highlighted the problem of subject access in library online public access catalogues (OPACs). The library OPAC has changed relatively little since its inception, designed to find what is already known, not discover and explore. This research aims to enhance OPAC subject searching by deriving facets of the DDC and populating these with a library collection for display at a View-based searching OPAC interface. A novel method is devised that enables the automatic deconstruction of complex DDC notations into their component facets. Identifying facets based upon embedded notational components reveals alternative, multidimensional subject arrangements of a library collection and resolves the problem of disciplinary scatter. The extent to which the derived facets enhance users' subject searching perceptions and activities at the OPAC interface is evaluated in a small-scale usability study. The results demonstrate the successful derivation of four fundamental facets (Reference Type, Person Type, Time and Geographic Place). Such facet derivation and deconstruction of Dewey notations is recognised as a complex process, owing to the lack of a uniform notation, notational re-use and the need for distinct facet indicators to delineate facet boundaries. The results of the preliminary usability study indicate that users are receptive to facet-based searching and that the View-based searching system performs equally as well as a current form fill-in interface and, in some cases, provides enhanced benefits. It is concluded that further exploration of facet-based searching is clearly warranted and suggestions for future research are made.
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La, Barre Kathryn. "Faceted navigation and browsing features in new OPACs: A more robust solution to problems of information seekers? (extended abstract)." dLIST, 2007. http://hdl.handle.net/10150/106157.

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In November, 2005, James Billington, the Librarian of Congress, proposed the creation of a “World Digital Library” of manuscripts and multimedia materials in order to “bring together online, rare and unique cultural materials.” Google became the first private sector partner for this project with a pledge of 3 million dollars (http://www.loc.gov/today/pr/2005/05- 250.html). One month later, the Bibliographic Services Task Force of the University of California Libraries released a report: Rethinking how we provide bibliographic services for the University of California. (Bibliographic Services Task Force, 2005). Key proposals included the necessity of enhancing search and retrieval, redesigning the library catalog or OPAC (Online Public Access Catalog), encouraging the adoption of new cataloguing practices, and supporting continuous improvements to digital access. By mid-January, 2006, the tenor of discussion reached fever pitch. On January 12, 2006, the North Carolina State University (NCSU) Library announced the deployment of a revolutionary implementation for their OPAC of Endeca’s ProFind™, which until now had only been used in commercial e-commerce or other business applications. NCSU made the bold claim that “the speed and flexibility of popular online search engines” had now entered the world of the online catalog through the use of faceted navigation and browsing (NCSU, online). A few days later, Indiana University posted A White Paper on the Future of Cataloging at Indiana University which served to identify current trends with direct impact on cataloging operations and defined possible new roles for the online catalog and cataloging staff at Indiana University (Byrd et. al, 2006). The Indiana report was a response to an earlier discussion regarding The Future of Cataloging put forth by Deanna Marcum, Director of Public Service and Collection Management at the Library of Congress (Marcum, 2005). Marcum posed a provocative series of questions and assertions based in part on the Pew Internet and American Life Project study: Counting on the Internet (Horrigan and Rainey, 2005). “[D]o we need to provide detailed cataloging information for digitized materials? Or can we think of Google as the catalog?” Following Marcum’s comments, and the announcement of the “World Digital Library”, the Library of Congress released a commissioned report in March 2006, The changing nature of the catalog and its integration with other discovery tools” (Calhoun, 2006). This report contained blueprints for change to Library of Congress cataloguing processes, advocated integration of the catalog with other discovery tools, included suggestions that the Library of Congress Subject Headings LCSH, long used to support subject access to a variety of cultural objects, be dismantled, and argued that fast access to materials should replace the current standard of full bibliographic records for materials. These arguments were supported by assertions that users seem to prefer the ease of Google over the catalog, and that the proposed changes would place the Library of Congress in a better market position to provide users with the services they want most (Fast and Campbell, 2004; OCLC, 2002). The ensuing debates served to crystallize the intersection and convergence of the traditional missions of the Libraries, Archives and Museum (LAM) communities to provide description, control and access to informational and cultural objects. One consistent theme emerged: What competencies and roles can each community bring to bear upon discussions of digitization, access and discovery, and provide solutions for user needs? The library community had a ready answer. Originally designed to provide inventory, acquisitions and circulation support for library staff, the modern library catalog was designed according to a set of principles and objectives as described by Charles Ammi Cutter in 1876. These principles and objectives underpin the core competency of the library community to create bibliographic records designed to assist users in the following tasks: to find (by author, title and subject), and to identify, select and obtain material that is of interest to them. Discussions about the aims of the catalog are not new and have been ongoing since the early 1970s when the earliest forays of the catalog into the digital age began (Cochrane, 1978). The role played by metadata (i.e. bibliographic records assembled in catalogs), as well as the central importance of search and retrieval mechanisms have long been central players in proposed solutions to providing better services to users. Thus, the suggestions of staff at the Library of Congress, that digitization is tantamount to access, and that search engines, like Google, may supplant the catalog as the chief means of access to cultural and informational materials, have galvanized action throughout the library and information science community. It is critical that any discussions and recommended solutions maintain a holistic view of the principles and objectives of the catalog. The actions and continuing discussions that resulted from these developments drew heavily from several sources, including the experiences of the LAM community with the creation of metadata standards, Web 2.0 applications that make data work harder, more accessible and consolidated, the appeal of folksonomy and social classification, and the importance of leveraging rather than abandoning legacy access systems in a time of spiraling costs and decreasing budgets. For archived discussions of these issues see: lNGC4LIB listserv (Next Generation Catalogs for Libraries http://listserv.nd.edu/archives/ngc4lib.html) and Web4LIB discussion list (http://lists.webjunction.org/web4lib/). Another valuable source is Lorcan Dempsey’s blog, Of libraries, services and networks (http://orweblog.oclc.org/). To leverage some legacy subject access systems it is proposed that more (not less) should be done to process these data, and corresponding authority files (e.g. thesaurus files) in order to use the faceted navigation and browsing features of new online search engines to best advantage. An ongoing research proposal will be described in brief, concentrating on the second goal of a project which plans to develop an integrated conceptual framework which could serve all designers working on information access and discovery systems. A framework for critical analysis of needed and missing features that is grounded in traditional principles, borne out by practice (Cutter, 1976; La Barre, 2006; Ranganathan, 1962) and which builds on feature analysis protocols for early OPACs is urgently needed (Cochrane, 1978; Hildreth, 1995). Further, another analysis of the sufficiency of current data preparation is long overdue (Anderson and Peréz-Carballo, 2005). This position paper builds on La Barre (2006, unpublished dissertation) which studied faceted browsing and navigation in websites, using wireframe analysis. This research uncovered features needed for digital library OPAC design. Building on JISC and Sparks work, a future study will focus on the information seeking research academics and the information seekers, rather than the general public, or the overstudied undergraduate user, thus rounding out the work of others cited by Marcum, Kuhlthau, etc.
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Afonso, Maria Gorete Barroso. "Para uma biblioteca do conhecimento: Aplicações da Web semântica à organização da informação em catálogos de acesso público." Doctoral thesis, Universidade Portucalense, 2015. http://hdl.handle.net/11328/1373.

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Tese de Doutoramento em Educação na Área de Especialização em Educação e Bibliotecas.
A recuperação da informação contida nos Web OPAC (Online public access catalog) das bibliotecas enfrenta sérias limitações provocadas pelas características próprias dos instrumentos de organização e recuperação utilizados. Índices, thesauri e classificações tradicionalmente aplicados aos registos catalográficos apenas permitem recuperar o conteúdo bibliográfico ou documental existente, alheando-se da possibilidade de que essa recuperação possibilite, desde logo, um acesso a conhecimento expandido através das mesmas palavras-chave escolhidas para a pesquisa num dado catálogo. No entanto, a Web semântica permite a transformação destes modelos de acesso ao conhecimento em modelos de ontologias de nível superior. Surge assim a questão que leva ao desenvolvimento da presente tese de doutoramento, e que procura, em primeiro lugar, indagar sobre os mecanismos de representação do conhecimento mais adequados às bibliotecas públicas e, subsequentemente, sobre a possibilidade de desenvolver um produto específico aplicável a uma biblioteca pública em concreto. Apresentando como objetivo final o desenvolvimento de um produto tecnológico com as caraterísticas acima apontadas, a investigação aplicou uma metodologia de design science que levou à concretização de um protótipo aplicado e testado preliminarmente no catálogo do Fundo Local da Biblioteca Municipal de Montalegre. A metodologia adotada, cíclica e interativa, envolveu a cooperação interdisciplinar entre os campos da Ciência da Informação, da Informática e Computação e da Educação. O desenvolvimento do protótipo permitiu, numa primeira fase, transformar a informação encerrada no catálogo em linha da Rede Concelhia de Bibliotecas de Montalegre (RCBM) e cruzar devidamente essa informação com outras fontes, como por exemplo a DBpedia, num formato adequado à Web semântica, representado por triplos RDF (Resource Description Framework) que estabelecem relações definidas em ontologias, entre os recursos oriundos de diferentes fontes. Numa segunda fase, esses dados abertos e ligados, com identificadores únicos e universais (URIs), ficaram disponíveis para exploração a partir de uma plataforma de código aberto CKAN (Comprehensive Knowledge Archive Network) usada para o efeito; esta plataforma permite que um fluxo de Título: Para uma biblioteca do conhecimento: Apl icações da Web semânt ica à organização da informação em catálogos de acesso públ ico transformação em conhecimento fique disponível para ser explorado e apropriado por terceiros. Os resultados demonstraram as potencialidades do protótipo, tendo sido comprovada uma representação adequada através de um pequeno conjunto de pesquisas SPARQL (Protocol and RDF Query Language) que cruzam os dados do catálogo (em RDF) com os dados da DBpedia. Assim, uma pesquisa no OPAC sobre um determinado autor, permite aceder, não só às obras desse mesmo autor detidas ou acessíveis através da biblioteca, mas também a um conjunto de informação biobibliográfica, estudos, representações de imagens, etc., disponível na Internet e que concretiza o objetivo de expandir o conhecimento do utilizador através de uma simples pesquisa num catálogo. Todo o trabalho está documentado e é facilmente replicável por qualquer outra biblioteca que tenha um catálogo num formato da família MARC (Machine Readable Cataloging). Conclui-se pois que, não só a Web semântica permite tornar mais eficazes os serviços de recuperação da informação das bibliotecas, como essa possibilidade é replicável e possibilita uma maior cooperação em rede entre bibliotecas de uma mesma região, ou até nacionais e internacionais.
The retrieval of information contained in web OPACs (Online public access catalog) libraries face serious limitations caused by the characteristics of the organization and retrieval tools used. Indexes, thesauri and classifications traditionally applied to cataloging registers only enable to recover the existing bibliographic or documentary content, alienating the possibility that this recovery enable, firstly, access to expanded knowledge through the same keywords chosen for research in a given catalog. However, the semantic web allows the transformation of these access models to knowledge in models of top-level ontologies. This raises the question that leads to the development of this PhD thesis, and seeking, first, to inquire into the knowledge representation mechanisms best suited to public libraries and, subsequently, on the possibility of developing a specific product applicable to a public library in concrete. Featuring the ultimate goal the development of a technological product with the features outlined above, research applied a design science methodology that led to the realization of a prototype tested preliminarily on Local Fund catalog of Montalegre Municipal Library. The methodology adopted, cyclical and interactive, involved the interdisciplinary cooperation between the fields of Information, Informatics and Computer Science and Education. The development of the prototype allowed, initially, the transformation of the information contained in the OPAC Web of District Council Library Network of Montalegre and properly cross with other sources, such as DBpedia, in an appropriate format to the semantic web, represented by triples RDF (Resource Description Framework) establishing relationships defined in ontologies, between resources from different sources. Therefore, these open and linked data with unique and universal identifiers (Uniform Resource Identifier - URIs), would be available for exploitation from an open-source platform CKAN (Comprehensive Knowledge Archive Network) used for this purpose; this platform enable that a flow of transformation into knowledge became available to be explored and appropriated by others. The results demonstrated the potential of the prototype, with adequate representation been proven through a small set of SPARQL (Protocol and RDF Query Language) research that intersect catalog data (RDF) with data from DBpedia. Thus, a search on OPAC about a particular author, allows access not only to the works of the same author detained or accessible by the library, but also to a set of biobibliographic information, studies, image representations, etc., available on the Internet and concretize the objective of expanding the knowledge of the user through a simple search in a catalog. All work is documented and is easily replicable in any other library that has a catalog in a MARC (Machine Readable Cataloging) family format. It is therefore concluded that, not only the semantic web allows increase the effectiveness of information retrieval services of libraries, as this possibility is replicable and enables greater network cooperation between libraries in the same region, or even national and international.
Orientação: Prof. Doutora Manuela Barreto Nunes e Prof. Doutor António Manuel Andrade.
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Barret, Beverley, and n/a. "Users and an online catalogue : an evaluation of the OPAC at the Dixson Library, University of New England." University of Canberra. Information, Language & Culture Studies, 1989. http://erl.canberra.edu.au./public/adt-AUC20060607.162838.

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This thesis reports on a study undertaken at the Dixson Library, University of New England. The purpose of the study was to develop an understanding of users of online public access catalogues (OPACs). The understanding gained from the study will assist in the development of improvements to the Library's OPAC, and increase user ability to access information from the OPAC. The study replicated the user questionnaire of the Online Patron Access Project, sponsored by the Council on Library Resources (CLR) in 1981/83. The questionnaire was modified slightly to suit conditions at the Dixson Library. The study addressed nine research questions relating to the users, their reactions, attitudes, experiences and problems. The user task and their suggestions for improvement were also addressed. The study formally tested three propositions between the variables user task, success and attitudes in relation to OPAC users. The findings show the analysis of the responses for the population as a whole, and, where relevant, for eight groups of student respondents based on their academic affiliation. The student population was of particular importance because of the preponderance of external students at the University of New England. The differences in the findings between the groups of students were discussed, and where possible, explained. The three formal propositions were tested by carrying out Chi square tests for the values of each variable. Nine significant relationships were found. Comparisons were made between the Dixson Library findings and those of the CLR study. Recommendations and conclusions were drawn from the study, including areas for further research.
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Weimar, Alexander. "Inhaltserschließung und OPAC-Retrieval am Beispiel des OPAC der Universitätsbibliothek Heidelberg." [S.l. : s.n.], 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11611965.

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Zhao, Qibin. "Oscillatory shearing in polymer opals." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709151.

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Books on the topic "OPACs"

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Hancock-Beaulieu, Micheline. Opacs. London: Library and Information Technology Centre, 1993.

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JANET User Group for Libraries (Great Britain). and University of Sussex Library, eds. JANET-OPACS: OPACS in the UK : a list of interactive library catalogues on JANET. [Brighton]: Janet User Group for Libraries, 1991.

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JANET User Group for Libraries. and University of Sussex Library, eds. JANET-OPACS: OPACS in the UK : a list of interactive library catalogues on JANET. [Brighton]: [University of Sussex], 1991.

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Linda, Keenan, and Reagan Michael 1943-, eds. Search sheets for OPACs on the Internet: A selective guide to U.S. OPACs utilizing VT100 emulation. Westport, CT: Meckler, 1991.

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Nielsen, Inger Høy. Monitoring online catalogues (OPACs) in the Nordic technological university libraries. Esbo, Finland: NORDINFO, 1993.

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Kiemas, Ramatun Anggraini. An evaluation of OPACs in six academic libraries in the United Kingdom. Birmingham: University of Central England in Birmingham, 2003.

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Linton, Tracy Maria. The impact of Z39.50 on library catalogues: OPACs on the World Wide Web. Loughborough: Loughborough University, 1996.

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Slack, Frances. OPACs: Using enhanced transaction logs to achieve more effective online help for subject searching. Ann Arbor, Mich: UMI Dissertation Services, 2002.

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Anglo-Nordic Seminar (3rd 1990 Cranfield Conference Centre). OPACs and the user: Proceedings of the Third Anglo-Nordic Seminar, 8-11 April 1990. [London]: British Library Research and Development Dept., 1991.

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Library, University of Sussex. Opacs in the UK: A list of interactive library catalogues on Janet ...3 April 1991. (Brighton): Janet User Group for Libraries, 1991.

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Book chapters on the topic "OPACs"

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Chang, Hsuan-Pu, Wei-Ting Chang, and Shi-Pin Fong. "An Authoring System of Creating Graphic Map for Item Search Based on Library OPACs." In Lecture Notes in Electrical Engineering, 275–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-55038-6_42.

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Chang, Hsuan-Pu, Wei-Ting Chang, and Shi-Pin Fong. "An Authoring System of Creating Graphic Map for Item Search Based on Library OPACs." In Lecture Notes in Electrical Engineering, 1417–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41674-3_197.

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Míguez, H., A. Blanco, F. García-Santamaría, M. Ibisate, C. López, F. Meseguer, F. López-Tejeira, and J. Sánchez-Dehesa. "Inverse Opals Fabrication." In Photonic Crystals and Light Localization in the 21st Century, 219–27. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0738-2_16.

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Zhigeng, Wang. "Rebuilding the Library OPAC." In Web Information Systems – WISE 2006 Workshops, 153–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11906070_15.

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Vogel, Burkhard. "Phono-Amp with OPAs." In Slopes and Levels, 63–72. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99443-3_8.

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Galisteo-López, Juan F., Luz K. Gil, Marta Ibisate, and Cefe López. "Organic Opals: Properties and Applications." In Organic and Hybrid Photonic Crystals, 31–55. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16580-6_2.

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Khare, C. P. "Carissa opaca Stapf. Ex Haines." In Indian Medicinal Plants, 1. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-70638-2_293.

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Gavin, Pierre. "OPAC: Online Public Access Catalogue." In New Information Technologies and Libraries, 121–26. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5452-6_18.

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Xiao, Huang, Han Xiao, and Claudia Eckert. "OPARS: Objective Photo Aesthetics Ranking System." In Lecture Notes in Computer Science, 861–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36973-5_103.

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Armellini, C., A. Chiappini, A. Chiasera, Maurizio Ferrari, Yoann Jestin, E. Moser, Richard Retoux, et al. "Fabrication and Characterization of Silica Opals." In Advances in Science and Technology, 118–26. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908158-12-5.118.

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Conference papers on the topic "OPACs"

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Liang, Lei, Yanling Wang, Bin Liu, Yongfei Li, Longhao Tang, Baojun Bai, and Ye Zhang. "Synthesis and Application of a Low Formation Damage Clay Stabilizer." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2022. http://dx.doi.org/10.2118/200039-ms.

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Abstract To develop a low formation damage clay stabilizer, a kind of organic polyether amine clay stabilizer (OPACS) was synthesized. Compared with the commercial clay stabilizers, the application performance of the OPACS was investigated. OPACS was synthesized with 1, 2-propanediol, 2-(chloromethyl)oxirane and ammonia as main raw materials. The molecular structure of OPACS were characterized by FTIR and NMR, and its anti-swelling performance was tested by centrifugation. Other performance, including its temperature resistance, acid and alkali resistance, elution resistance and etc., were also researched. Different permeability cores were used to test the formation damage of OPACS, and its anti-swelling mechanism was studied by SEM. The FTIR and NMR spectra showed that the expected product structure was synthesized. When the clay stabilizer was adding with 2.0 wt.%, the anti-swelling rate of OPACS was over 90% which was better than the commercial clay stabilizers (about 80%) we bought. At the temperature range of 20 °C-120 °C and the pH range of 2-12, the anti-swelling rate of OPACS changed less than 2.5%. In the long-term efficacy test, the elution recovery rate of OPACS was higher than 92% within the concentration between 0.5 wt.%-3.0 wt.%. Natural cores with different permeability were selected for core flow experiments. The test results showed that the permeability recovery rate of cores were more than 95% treated with OPACS, which meant the formation damage value was less than 5%. From the SEM of clay treated with different clay stabilizers, we could find out the structure of clay treated with OPACS was more compact than those treated with other stabilizers we bought. These results have shown that OPACS can effectively inhibit the water absorption swelling of clay and recovery formation damage, which are helpful to the EOR and friendly to the environment.
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Ozel, Nevzat, and Tolga Cakmak. "Users' Expectations on Restructuring OPACs through Social Network Applications." In Int'l Conference on Cyber, Physical and Social Computing (CPSCom). IEEE, 2010. http://dx.doi.org/10.1109/greencom-cpscom.2010.21.

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Schneider, René. "The Next Generation of OPACs: What do Experts Consider as Musts and Don'ts?" In Proceedings of the International Conference on QQML2010. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814350303_0053.

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Anbu K., John Paul, and Sanjay Kataria. "Emerging Trends in Mobile OPACs Options and Solutions in Creating Mobile Optimized Library Catalogues." In 2018 5th International Symposium on Emerging Trends and Technologies in Libraries and Information Services (ETTLIS). IEEE, 2018. http://dx.doi.org/10.1109/ettlis.2018.8485202.

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Tanida, Jun, Yasunori Nishimura, and Yoshiki Ichioka. "A Design of an Optical Parallel Multiprocessor Based on Optical Array Logic Modular Architecture." In Optical Computing. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/optcomp.1991.pdp1.

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Optical array logic (OAL) is proposed as a basis of parallel optical digital computing.1 This technique is applied to an optical digital computing system called OPALS (optical parallel array logic system).2 Processing of the OPALS is based on SIMD (single instruction multiple data) and iterative structures, which is designed to utilize the characteristics of OAL effectively. However, there are problems related to the structure of the OPALS. Since the OPALS has a closed architecture, it is difficult to extend the system. Although many data can be processed simultaneously, minute operations for a part of data cause processing inefficiency. In addition, necessity of three dynamic components in the OPALS results in complication of hardware and degradation of processing throughput. Thus a new concept for system construction is an important subject in OAL scheme.
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D'Andrea, A., Laura Pilozzi, D. Schiumarini, and N. Tomassini. "Photonic band gap of opals and inverse opals." In Photonics, Devices, and Systems II, edited by Miroslav Hrabovsky, Dagmar Senderakova, and Pavel Tomanek. SPIE, 2003. http://dx.doi.org/10.1117/12.498376.

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Bueno, Luciano A., Roberto Bertholdo, Djalma A. Barros Filho, Younes Messaddeq, and Sidney J. L. Ribeiro. "Rare earth doped synthetic opals and inverse opals." In International Symposium on Optical Science and Technology, edited by Edward J. A. Pope, Helmut K. Schmidt, Bruce S. Dunn, and Shuichi Shibata. SPIE, 2002. http://dx.doi.org/10.1117/12.456543.

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Tanida, J., and Y. Ichioka. "OPALS: Optical Parallel Array Logic System." In Optical Computing. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/optcomp.1985.tua4.

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A novel optical digital computing system called Optical Parallel Array Logic System (OPALS) is presented, which can execute cellular logic1 in parallel. The system is constructed on the basis of the concept of optical array logic. The pure optical version of the OPALS can be realized by using a dynamic optical coding technique and optical correlation by a multi-focus imaging system. Although the OPALS is still a conceptual system, it would be expected to be a prototype of optical digital computing systems in future.
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Liu, Yuan Bin, Jun Qiu, Rong Jin, and Lin Hua Liu. "Artificial Opals: Reflection Spectra and Distribution Laws of Energy Transfer." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6510.

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In this work, we investigated the reflection properties of artificial opals composed of submicron silica spheres with diverse structural parameters and under the effect of light in different states. Furthermore, the primary rules how the reflection properties of artificial opals convert as these factors changing have been revealed clearly. These factors can take effects in changing the shape, value, and position of the peak of the hemispherical reflectance of artificial opals. Then we got the distribution and propagation process of the Poynting vectors corresponding to the positions of the diffraction peak and the low reflectance in the artificial opals at normal and oblique incidence of P-polarization. Comparing with the theoretical interpretation which is a little complicated and nonobjective, this paper will provide a visual result to explain the reason why the structure has high reflectance in some spectral ranges.
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Marimuthu, K., D. Ganesh Gopal, Shivam Aditya, and Varun Mittal. "Cryptanalysis of oPass." In 2014 International Conference on Advanced Communication, Control and Computing Technologies (ICACCCT). IEEE, 2014. http://dx.doi.org/10.1109/icaccct.2014.7019457.

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Reports on the topic "OPACs"

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NMR Publikations. Vähennä ruokahävikkiä - Ympäristöystävällisen ja kannattavan ruokatalouden opas. Nordisk Ministerråd, September 2012. http://dx.doi.org/10.6027/anp2012-743.

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Saraiva, Aline, Lana Fonseca, and Rafael Valadares. Categorização funcional de proteínas de um cultivo biológico da bactéria Rhodococcus opacus. ITV, August 2019. http://dx.doi.org/10.29223/prod.tec.itv.ds.2019.9.saraiva.

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Melo-Velandia, Luis Fernando, Camilo Andrés Orozco-Vanegas, and Daniel Parra-Amado. Ofertas Públicas de Adquisición y su efecto sobre las rentabilidades en el mercado accionario: El caso de NUTRESA y SURA en Colombia. Banco de la República, April 2022. http://dx.doi.org/10.32468/be.1195.

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Se emplea un estudio de eventos donde se evalúa si hay impactos significativos en las rentabilidades anormales del mercado accionario colombiano a partir de las ofertas públicas de adquisición (OPAs) realizadas sobre las empresas Nutresa y Sura. Definiendo el evento como el 17 de enero de 2022, el cual está relacionado con la adjudicación de las primeras OPAs y el anuncio de una segunda ronda de estas operaciones, se encuentra evidencia estadística de que dicho evento tuvo un efecto significativo sobre los retornos de las acciones estudiadas. En particular, se puede afirmar que, bajo las diferentes especificaciones estimadas, los retornos fueron estadísticamente diferentes durante el evento respecto a aquellos que se hubieran observado en tiempos normales sin la presencia del evento.
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Dantas, Gautam, Marcus Foston, and Tae Seok Moon. Final Report - Systems biology of Rhodococcus opacus to enable production of fuels and chemicals from lignocellulos. Office of Scientific and Technical Information (OSTI), November 2018. http://dx.doi.org/10.2172/1483375.

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Stefanoni, Pablo. Que se vayan todos, otra vez, en Perú. Fundación Carolina, December 2022. http://dx.doi.org/10.33960/ac_26.2022.

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La decisión de Pedro Castillo de cerrar el Congreso, que desde el comienzo actuó de manera obstruccionista e intentó una y otra vez destituirlo, fue un salto al vacío que acabó con la detención del mandatario. Proveniente del Perú profundo, el presidente nunca pudo armar un gobierno y se recostó en un círculo opaco de colaboradores que acabó generando un fuerte aislamiento del jefe de Estado. La nueva presidenta se enfrenta hoy con fuertes protestas que demandan la disolución del Congreso, más impopular que Castillo, y el adelanto electoral para 2023, en un nuevo capítulo de una sucesión de crisis políticas que llevó a la mayoría de los expresidentes a la prisión.
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Frank, Matthias, David N. Fittinghoff, Dan E. Bower, Owen B. Drury, John M. Dzenitis, Robert A. Buckles, Carter Munson, and Carl H. Wilde. Line-of-sight measurements for the NIF Neutron Imaging System and determination of line-of-sight offsets in OPAS 90-135 images. Office of Scientific and Technical Information (OSTI), May 2011. http://dx.doi.org/10.2172/1113514.

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Potential Benefits of Manmade Opals Demonstrated for First Time (Fact Sheet). Office of Scientific and Technical Information (OSTI), June 2012. http://dx.doi.org/10.2172/1045719.

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