Diese Datenbank enthält ca. 39.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 19. Oktober 2016)
21Maflahi, N. ; Thelwall, M.: When are readership counts as useful as citation counts? : Scopus versus Mendeley for LIS journals.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.191-199.
Abstract: In theory, articles can attract readers on the social reference sharing site Mendeley before they can attract citations, so Mendeley altmetrics could provide early indications of article impact. This article investigates the influence of time on the number of Mendeley readers of an article through a theoretical discussion and an investigation into the relationship between counts of readers of, and citations to, 4 general library and information science (LIS) journals. For this discipline, it takes about 7 years for articles to attract as many Scopus citations as Mendeley readers, and after this the Spearman correlation between readers and citers is stable at about 0.6 for all years. This suggests that Mendeley readership counts may be useful impact indicators for both newer and older articles. The lack of dates for individual Mendeley article readers and an unknown bias toward more recent articles mean that readership data should be normalized individually by year, however, before making any comparisons between articles published in different years.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23369/abstract.
Wissenschaftsfach: Bibliothekswesen ; Informationswissenschaft
Objekt: Mendeley ; Scopus
22Mu, T. ; Goulermas, J.Y. ; Korkontzelos, I. ; Ananiadou, S.: Descriptive document clustering via discriminant learning in a co-embedded space of multilevel similarities.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.106-133.
Abstract: Descriptive document clustering aims at discovering clusters of semantically interrelated documents together with meaningful labels to summarize the content of each document cluster. In this work, we propose a novel descriptive clustering framework, referred to as CEDL. It relies on the formulation and generation of 2 types of heterogeneous objects, which correspond to documents and candidate phrases, using multilevel similarity information. CEDL is composed of 5 main processing stages. First, it simultaneously maps the documents and candidate phrases into a common co-embedded space that preserves higher-order, neighbor-based proximities between the combined sets of documents and phrases. Then, it discovers an approximate cluster structure of documents in the common space. The third stage extracts promising topic phrases by constructing a discriminant model where documents along with their cluster memberships are used as training instances. Subsequently, the final cluster labels are selected from the topic phrases using a ranking scheme using multiple scores based on the extracted co-embedding information and the discriminant output. The final stage polishes the initial clusters to reduce noise and accommodate the multitopic nature of documents. The effectiveness and competitiveness of CEDL is demonstrated qualitatively and quantitatively with experiments using document databases from different application fields.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23374/abstract.
Themenfeld: Automatisches Klassifizieren
23Bertin, M. ; Atanassova, I. ; Gingras, Y. ; Larivière, V.: ¬The invariant distribution of references in scientific articles.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.164-177.
Abstract: The organization of scientific papers typically follows a standardized pattern, the well-known IMRaD structure (introduction, methods, results, and discussion). Using the full text of 45,000 papers published in the PLoS series of journals as a case study, this paper investigates, from the viewpoint of bibliometrics, how references are distributed along the structure of scientific papers as well as the age of these cited references. Once the sections of articles are realigned to follow the IMRaD sequence, the position of cited references along the text of articles is invariant across all PLoS journals, with the introduction and discussion accounting for most of the references. It also provides evidence that the age of cited references varies by section, with older references being found in the methods and more recent references in the discussion. These results provide insight into the different roles citations have in the scholarly communication process.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23367/abstract.
24Teixeira da Silva, J.A.: ¬The Importance of the Anonymous Voice in Postpublication Peer Review.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.243.
(Letter to the editor)
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23588/abstract.
25Gómez-Núñez, A.J. ; Vargas-Quesada, B. ; Moya-Anegón, F. de: Updating the SCImago journal and country rank classification : a new approach using Ward's clustering and alternative combination of citation measures.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.178-190.
Abstract: This study introduces a new proposal to refine the classification of the SCImago Journal and Country Rank (SJR) platform by using clustering techniques and an alternative combination of citation measures from an initial 18,891 SJR journal network. Thus, a journal-journal matrix including simultaneously fractionalized values of direct citation, cocitation, and coupling was symmetrized by cosine similarity and later transformed into distances before performing clustering. The results provided a new cluster-based subject structure comprising 290 clusters that emerge by executing Ward's clustering in two phases and using a mixed labeling procedure based on tf-idf scores of the original SJR category tags and significant words extracted from journal titles. In total, 13,716 SJR journals were classified using this new cluster-based scheme. Although more than 5,000 journals were omitted in the classification process, the method produced a consistent classification with a balanced structure of coherent and well-defined clusters, a moderated multiassignment of journals, and a softer concentration of journals over clusters than in the original SJR categories. New subject disciplines such as "nanoscience and nanotechnology" or "social work" were also detected, providing evidence of good performance of our approach in refining the journal classification and updating the subject classification structure.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23370/abstract.
Objekt: SCImago Journal and Country Rank
26Dobrota, M. ; Bulajic, M. ; Bornmann, L. ; Jeremic, V.: ¬A new approach to the QS university ranking using the composite I-distance indicator : uncertainty and sensitivity analyses.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.200-211.
Abstract: Some major concerns of universities are to provide quality in higher education and enhance global competitiveness, thus ensuring a high global rank and an excellent performance evaluation. This article examines the Quacquarelli Symonds (QS) World University Ranking methodology, pointing to a drawback of using subjective, possibly biased, weightings to build a composite indicator (QS scores). We propose an alternative approach to creating QS scores, which is referred to as the composite I-distance indicator (CIDI) methodology. The main contribution is the proposal of a composite indicator weights correction based on the CIDI methodology. It leads to the improved stability and reduced uncertainty of the QS ranking system. The CIDI methodology is also applicable to other university rankings by proposing a specific statistical approach to creating a composite indicator.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23355/abstract.
27Abraham, C. ; Junglas, I. ; Watson, R.T. ; Boudreau, M.-C.: Explaining the unexpected and continued use of an information system with the help of evolved evolutionary mechanisms : uncertainty and sensitivity analyses.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.212-231.
Abstract: Explaining how, why, and to what extent humans use information systems has been at the heart of the information systems (IS) discipline, and although successful models have emerged, mostly relying on social and cognitive psychology in their theoretical underpinnings, there are still cases that remain unexplainable. In this article, we scrutinize one of these cases where the continued use of technology cannot be explained by one of the most prominent traditional IS models to date. We analyze our qualitative case study by juxtaposing two theoretical lenses: a traditional IS perspective (i.e., the "unified theory of acceptance and use" model) versus an evolutionary psychology perspective (i.e., the four-drive model). We find that a more comprehensive understanding of continued IS usage is possible when including an evolutionary psychology perspective to the existing models. Specifically, we propose three new concepts, including evolved performance expectancy, evolved effort expectancy, and evolved social influence. We also demonstrate that, in some situations, cognitive and social constructs dominate, whereas in other situations, the evolutionary dependent constructs associated with human nature take over.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23344/abstract.
28Haustein, S. ; Bowman, T.D. ; Holmberg, K. ; Tsou, A. ; Sugimoto, C.R. ; Larivière, V.: Tweets as impact indicators : Examining the implications of automated "bot" accounts on Twitter.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.232-238.
Abstract: This brief communication presents preliminary findings on automated Twitter accounts distributing links to scientific articles deposited on the preprint repository arXiv. It discusses the implication of the presence of such bots from the perspective of social media metrics (altmetrics), where mentions of scholarly documents on Twitter have been suggested as a means of measuring impact that is both broader and timelier than citations. Our results show that automated Twitter accounts create a considerable amount of tweets to scientific articles and that they behave differently than common social bots, which has critical implications for the use of raw tweet counts in research evaluation and assessment. We discuss some definitions of Twitter cyborgs and bots in scholarly communication and propose distinguishing between different levels of engagement-that is, differentiating between tweeting only bibliographic information to discussing or commenting on the content of a scientific work.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23456/abstract.
29Stover, J.A. ; Winter, Y. ; Koppel, M. ; Kestemont, M.: Computational authorship verification method attributes a new work to a major 2nd century African author.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.239-242.
Abstract: We discuss a real-world application of a recently proposed machine learning method for authorship verification. Authorship verification is considered an extremely difficult task in computational text classification, because it does not assume that the correct author of an anonymous text is included in the candidate authors available. To determine whether 2 documents have been written by the same author, the verification method discussed uses repeated feature subsampling and a pool of impostor authors. We use this technique to attribute a newly discovered Latin text from antiquity (the Compendiosa expositio) to Apuleius. This North African writer was one of the most important authors of the Roman Empire in the 2nd century and authored one of the world's first novels. This attribution has profound and wide-reaching cultural value, because it has been over a century since a new text by a major author from antiquity was discovered. This research therefore illustrates the rapidly growing potential of computational methods for studying the global textual heritage.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23460/abstract.
30Degkwitz, A.: Innovationspotenziale cloud-basierter Bibliothekssysteme.
In: B.I.T. Online. 19(2016) H.1, S.27-33.
Abstract: Die Generation der neuen Bibliothekssysteme, die in "Clouds" gehostet und als "Software as a Service" (SaaS) betrieben werden, haben das Potenzial, die Verarbeitungsmöglichkeiten von "Big Data" in Bibliotheken Realität werden zu lassen. Auf diese Weise können bibliographische Metadaten mittels neuer und innovativer Verarbeitungsverfahren in großem Umfang aggregiert, angereichert und verlinkt werden, so dass herkömmliche Prozesse des Metadatenmanagements entweder weiterentwickelt oder durch neue Verfahren und Werkzeuge ersetzt werden. Aber die Potenziale der cloud-basierten Bibliothekssysteme haben die bibliothekarische Praxis noch nicht wirklich erreicht. Zugleich sind damit große Herausforderungen verbunden, die von den Bibliotheken unbedingt aufgegriffen und in neue Services zur Verbesserung der Recherchequalität ihrer Systeme umgesetzt werden müssen.
31Lee, J.H. ; Cho, H. ; Kim, Y.-S.: Users' music information needs and behaviors : design implications for music information retrieval systems.
In: Journal of the Association for Information Science and Technology. 67(2016) no.6, S.1301-1330.
Abstract: User studies in the music information retrieval (MIR) domain tend to be exploratory and qualitative in nature, involving a small number of users, which makes it difficult to derive broader implications for system design. In order to fill this gap, we conducted a large-scale user survey questioning various aspects of people's music information needs and behaviors. In particular, we investigated if general music users' needs and behaviors have significantly changed over time by comparing our current survey results with a similar survey conducted in 2004. In this paper, we present the key findings from the survey data and discuss 4 emergent themes-(a) the shift in access and use of personal music collections; (b) the growing need for tools to support collaborative music seeking, listening, and sharing; (c) the importance of "visual" music experiences; and (d) the need for ontologies for providing rich contextual information. We conclude by making specific recommendations for improving the design of MIR systems and services.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23471/abstract.
32Kiren, T. ; Shoaib, M.: ¬A novel ontology matching approach using key concepts.
In: Aslib journal of information management. 68(2016) no.1, S.99-111.
Abstract: Purpose Ontologies are used to formally describe the concepts within a domain in a machine-understandable way. Matching of heterogeneous ontologies is often essential for many applications like semantic annotation, query answering or ontology integration. Some ontologies may include a large number of entities which make the ontology matching process very complex in terms of the search space and execution time requirements. The purpose of this paper is to present a technique for finding degree of similarity between ontologies that trims down the search space by eliminating the ontology concepts that have less likelihood of being matched. Design/methodology/approach Algorithms are written for finding key concepts, concept matching and relationship matching. WordNet is used for solving synonym problems during the matching process. The technique is evaluated using the reference alignments between ontologies from ontology alignment evaluation initiative benchmark in terms of degree of similarity, Pearson's correlation coefficient and IR measures precision, recall and F-measure. Findings Positive correlation between the degree of similarity and degree of similarity (reference alignment) and computed values of precision, recall and F-measure showed that if only key concepts of ontologies are compared, a time and search space efficient ontology matching system can be developed. Originality/value On the basis of the present novel approach for ontology matching, it is concluded that using key concepts for ontology matching gives comparable results in reduced time and space.
Inhalt: Vgl.: http://dx.doi.org/10.1108/AJIM-04-2015-0054.
33Radio, E.: Semiotic principles for metadata auditing and evaluation.
In: Cataloging and classification quarterly. 54(2016) no.2, S.117-135.
Abstract: Metadata auditing is a common practice used to assess quality by drawing on a selection of documents to create a representative sample of the corpus. This article examines common techniques involved in auditing and argues that underlying semiotic principles should be considered before remediation and transformation work are undertaken. This article provides an inquiry into the structural nature of metadata, records, and corpora to analyze the semiotic processes and boundaries that can affect audits. Suggestions for effective auditing practices are offered as well as what can be obfuscated when transformations are undertaken without concern for the sign-functions of metadata.
Inhalt: Vgl.: DOI:10.1080/01639374.2015.1133750.
36Bernstein, S.: MARC reborn : migrating MARC fixed field metadata into the variable fields.
In: Cataloging and classification quarterly. 54(2016) no.1, S.23-38.
Abstract: Despite calls over the past decade and a half for MARC to be replaced with an encoding standard that is more in keeping with current metadata practices, the current standard has evolved in such a way as to render many of the arguments by those who call for its demise moot. A further revision to the standard is proposed to address the one remaining problem with MARC so as to allow it to better serve the needs of information seekers for years to come.
Inhalt: Vgl.: DOI: 10.1080/01639374.2015.1075642.
37Parka, A.L. ; Panchyshyn, R.S.: ¬The path to an RDA hybridized catalog : lessons from the Kent State University Libraries' RDA enrichment project.
In: Cataloging and classification quarterly. 54(2016) no.1, S.39-59.
Abstract: This article describes in detail the library implementation of a Resource Description and Access (RDA) Enrichment project. The library "hybridized," or enriched legacy data from Anglo-American Cataloguing Rules bibliographic records by the addition of specific RDA elements. The project also cleaned up various other elements in the bibliographic data that were not directly RDA-related. There were over 28 million changes and edits made to these records, changes that would never have been made otherwise because the library lacked the resources to do them independently. The enrichment project made the bibliographic data consistent, and helped prepared the data for its eventual transition to a linked data environment.
Inhalt: Vgl.: DOI: 10.1080/01639374.2015.1105897.
Objekt: RDA ; AACR
38Kishimoto, K. ; Snyder, T.: Popular Music in FRBR and RDA : toward user-friendly and cataloger-friendly identification of works.
In: Cataloging and classification quarterly. 54(2016) no.1, S.60-86.
Abstract: The gradual adoption since 2010 of the content standard Resource Description and Access, based on the conceptual model Functional Requirements for Bibliographic Records, has brought change to many areas of library cataloging, including popular music. In particular, the cataloging community has had to grapple with new practices in assigning access points for resources once considered simple, such as popular music albums containing songs written by people other than the featured recording artist. This article outlines some of the difficulties encountered and offers a principled approach to cataloging popular music that would reduce cataloger burden and reconcile catalog data with users' expectations.
Inhalt: Vgl.: DOI: 10.1080/01639374.2015.1105898.
Objekt: FRBR ; RDA
39Gauducheau, N.: ¬An exploratory study of the information-seeking activities of adolescents in a discussion forum.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.43-55.
Abstract: The aim of this study is to understand how teenagers use Internet forums to search for information. The activities of asking for and providing information in a forum were explored, and a set of messages extracted from a French forum targeting adolescents was analyzed. Results show that the messages initiating the threads are often requests for information. Teenagers mainly ask for peers' opinions on personal matters and specific verifiable information. The discussions following these requests take the form of an exchange of advice (question/answer) or a coconstruction of the final answer between the participants (with assessments of participants' responses, requests for explanations, etc.). The results suggest that discussion forums present different advantages for adolescents' information-seeking activities. The first is that this social medium allows finding specialized information on topics specific to this age group. The second is that the collaborative aspect of information seeking in a forum allows these adolescents to overcome difficulties commonly associated with the search process (making a precise request, evaluating a result).
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23359/abstract.
40Bhattacharya, S. ; Yang, C. ; Srinivasan, P. ; Boynton, B.: Perceptions of presidential candidates' personalities in twitter.
In: Journal of the Association for Information Science and Technology. 67(2016) no.2, S.249-267.
Abstract: Political sentiment analysis using social media, especially Twitter, has attracted wide interest in recent years. In such research, opinions about politicians are typically divided into positive, negative, or neutral. In our research, the goal is to mine political opinion from social media at a higher resolution by assessing statements of opinion related to the personality traits of politicians; this is an angle that has not yet been considered in social media research. A second goal is to contribute a novel retrieval-based approach for tracking public perception of personality using Gough and Heilbrun's Adjective Check List (ACL) of 110 terms describing key traits. This is in contrast to the typical lexical and machine-learning approaches used in sentiment analysis. High-precision search templates developed from the ACL were run on an 18-month span of Twitter posts mentioning Obama and Romney and these retrieved more than half a million tweets. For example, the results indicated that Romney was perceived as more of an achiever and Obama was perceived as somewhat more friendly. The traits were also aggregated into 14 broad personality dimensions. For example, Obama rated far higher than Romney on the Moderation dimension and lower on the Machiavellianism dimension. The temporal variability of such perceptions was explored.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23377/abstract.