Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 28. April 2022)
1Joo, S. ; Choi, I. ; Choi, N.: Topic analysis of the research domain in knowledge organization : a Latent Dirichlet Allocation approach.
In: Knowledge organization. 45(2018) no.2, S.170-183.
Abstract: Based on text mining, this study explored topics in the research domain of knowledge organization. A text corpus consisting of titles and abstracts was generated from 282 articles of the Knowledge Organization journal for the recent ten years from 2006 to 2015. Term frequency analysis and Latent Dirichlet allocation topic modeling were employed to analyze the collected corpus. Topic modeling uncovered twenty research topics prevailing in the knowledge organization field, including theories and epistemology, classification scheme, domain analysis and ontology, digital archiving, document indexing and retrieval, taxonomy and thesaurus system, metadata and controlled vocabulary, ethical issues, and others. In addition, topic trends over the tenyears were examined to identify topics that attracted more discussion in the journal. The top two topics that received increased attention recently were "ethical issues in knowledge organization" and "domain analysis and ontologies." This study yields insight into a better understanding of the research domain of knowledge organization. Moreover, text mining approaches introduced in this study have methodological implications for domain analysis in knowledge organization.
2Xie, I. ; Joo, S. ; Bennett-Kapusniak, R.: User involvement and system support in applying search tactics.
In: Journal of the Association for Information Science and Technology. 68(2017) no.5, S.1165-1185.
Abstract: Both user involvement and system support play important roles in applying search tactics. To apply search tactics in the information retrieval (IR) processes, users make decisions and take actions in the search process, while IR systems assist them by providing different system features. After analyzing 61 participants' information searching diaries and questionnaires we identified various types of user involvement and system support in applying different types of search tactics. Based on quantitative analysis, search tactics were classified into 3 groups: user-dominated, system-dominated, and balanced tactics. We further explored types of user involvement and types of system support in applying search tactics from the 3 groups. The findings show that users and systems play major roles in applying user-dominated and system-dominated tactics, respectively. When applying balanced tactics, users and systems must collaborate closely with each other. In this article, we propose a model that illustrates user involvement and system support as they occur in user-dominated tactics, system-dominated tactics, and balanced tactics. Most important, IR system design implications are discussed to facilitate effective and efficient applications of the 3 groups of search tactics.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23765/full.
3Lu, K. ; Joo, S. ; Lee, T. ; Hu, R.: Factors that influence query reformulations and search performance in health information retrieval : a multilevel modeling approach.
In: Journal of the Association for Information Science and Technology. 68(2017) no.8, S.1886-1898.
Abstract: Query reformulations can occur multiple times in a session, and queries observed in the same session tend to be related to each other. Due to the interdependent nature of queries in a session, it has been challenging to analyze query reformulation data while controlling for possible dependencies among queries. This study proposes a multilevel modeling approach in an attempt to analyze the effects of contextual factors and system features on types of query reformulation, as well as the relationship between types of query reformulation and search performance within a single research model. The results revealed that system features and users' educational background significantly influence users' query reformulation behaviors. Also, types of query reformulation had a significant impact on search performance. The main contribution of this study lies in that it adopted the multilevel modeling method to analyze query reformulation behavior while considering the nested structure of search session data. Multilevel analysis enables us to design an extensible research model to include both session-level and action-level factors, which provides a more extended understanding of the relationships among factors that influence query reformulation behavior and search performance. The multilevel modeling used in this study has practical implications for future query reformulation studies.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23872/full.
4Choi, N. ; Joo, S.: Booklovers' world : an examination of factors affecting continued usage of social cataloging sites.
In: Journal of the Association for Information Science and Technology. 67(2016) no.12, S.3022-3035.
Abstract: Little is known about what factors influence users' continued use of social cataloging sites. This study therefore examines the impacts of key factors from theories of information systems (IS) success and sense of community (SOC) on users' continuance intention in the social cataloging context. Data collected from an online survey of 323 social cataloging users provide empirical support for the research model. The findings indicate that both information quality (IQ) and system quality (SQ) are significant predictors of satisfaction and SOC, which in turn lead to users' intentions to continue using these sites. In addition, SOC was found to affect continuance intention not only directly, but also indirectly through satisfaction. Theoretically, this study draws attention to a largely unexplored but essential area of research in the social cataloging literature and provides a fundamental basis to understand the determinants of continued social cataloging usage. From a managerial perspective, the findings suggest that social cataloging service providers should constantly focus their efforts on the quality control of their contents and system, and the enhancement of SOC among their users.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23556/full.
Themenfeld: Social tagging ; Schöne Literatur
5Oh, K.E. ; Joo, S. ; Jeong, E.-J.: Online consumer health information organization : users' perspectives on faceted navigation.
In: Knowledge organization. 42(2015) no.3, S.176-186.
Abstract: We investigate facets of online health information that are preferred, easy-to-use and useful in accessing online consumer health information from a user's perspective. In this study, the existing classification structure of 20 top ranked consumer health information websites in South Korea were analyzed, and nine facets that are used in organizing health information in those websites were identified. Based on the identified facets, an online survey, which asked participants' preferences for as well as perceived ease-of-use and usefulness of each facet in accessing online health information, was conducted. The analysis of the survey results showed that among the nine facets, the "diseases & conditions" and "body part" facets were most preferred, and perceived as easy-to-use and useful in accessing online health information. In contrast, "age," "gender," and "alternative medicine" facets were perceived as relatively less preferred, easy-to-use and useful. This research study has direct implications for organization and design of health information websites in that it suggests facets to include and avoid in organizing and providing access points to online health information.
Inhalt: Vgl.: http://www.ergon-verlag.de/isko_ko/downloads/ko_42_2015_3.pdf.
Themenfeld: Klassifikationssysteme im Online-Retrieval ; Semantisches Umfeld in Indexierung u. Retrieval
6Satija, M.P. ; Joo, S. ; Jeong, E.-J.: ¬The 21st sdition (2014) of the Sears List of Subject Headings : a brief introduction.
In: Knowledge organization. 42(2015) no.3, S.187-189.
Abstract: States in brief the new features of the recently released 21st edition of the Sears List of Subject Headings. Introduces its new editor Barbara A. Bristow, and the new publisher EBSCO Information Services which recently acquired Sears' founder publisher since 1923, the H.W. Wilson Company. Names a few new subject headings in areas like science, technology, engineering and medicine (STEM). In this edition there are a total of 250 new headings making it a total of 10,000 preferred headings meant for small and medium sized libraries. Critically examines inconsistencies in a few headings. States the additional features of the online edition. Concludes to say the new edition maintains its stellar reputation of a handy list of general subject headings.
Inhalt: Vgl.: http://www.ergon-verlag.de/isko_ko/downloads/ko_42_2015_3.pdf.
Themenfeld: Verbale Doksprachen für präkombinierte Einträge
Objekt: Sears List of Subject Headings
Anwendungsfeld: Öffentliche Bibliotheken
7Xie, I. ; Joo, S.: Factors affecting the selection of search tactics : tasks, knowledge, process, and systems.
In: Information processing and management. 48(2012) no.2, S.254-270.
Abstract: This study investigated whether and how different factors in relation to task, user-perceived knowledge, search process, and system affect users' search tactic selection. Thirty-one participants, representing the general public with their own tasks, were recruited for this study. Multiple methods were employed to collect data, including pre-questionnaire, verbal protocols, log analysis, diaries, and post-questionnaires. Statistical analysis revealed that seven factors were significantly associated with tactic selection. These factors consist of work task types, search task types, familiarity with topic, search skills, search session length, search phases, and system types. Moreover, the study also discovered, qualitatively, in what ways these factors influence the selection of search tactics. Based on the findings, the authors discuss practical implications for system design to support users' application of multiple search tactics for each factor.
Inhalt: Vgl.: doi:10.1016/j.ipm.2011.08.009.
8Xie, I. ; Joo, S.: Transitions in search tactics during the Web-based search process.
In: Journal of the American Society for Information Science and Technology. 61(2010) no.11, S.2188-2205.
Abstract: Although many studies have identified search tactics, few studies have explored tactic transitions. This study investigated the transitions of search tactics during the Web-based search process. Bringing their own 60 search tasks, 31 participants, representing the general public with different demographic characteristics, participated in the study. Data collected from search logs and verbal protocols were analyzed by applying both qualitative and quantitative methods. The findings of this study show that participants exhibited some unique Web search tactics. They overwhelmingly employed accessing and evaluating tactics; they used fewer tactics related to modifying search statements, monitoring the search process, organizing search results, and learning system features. The contributing factors behind applying most and least frequently employed search tactics are in relation to users' efforts, trust in information retrieval (IR) systems, preference, experience, and knowledge as well as limitation of the system design. A matrix of search-tactic transitions was created to show the probabilities of transitions from one tactic to another. By applying fifth-order Markov chain, the results also presented the most common search strategies representing patterns of tactic transition occurring at the beginning, middle, and ending phases within one search session. The results of this study generated detailed and useful guidance for IR system design to support the most frequently applied tactics and transitions, to reduce unnecessary transitions, and support transitions at different phases.
Themenfeld: Benutzerstudien ; Suchtaktik