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: 21. Januar 2019)
1Bu, Y. ; Ding, Y. ; Xu, J. ; Liang, X. ; Gao, G. ; Zhao, Y.: Understanding success through the diversity of collaborators and the milestone of career.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.87-97.
Abstract: Scientific collaboration is vital to many fields, and it is common to see scholars seek out experienced researchers or experts in a domain with whom they can share knowledge, experience, and resources. To explore the diversity of research collaborations, this article performs a temporal analysis on the scientific careers of researchers in the field of computer science. Specifically, we analyze collaborators using 2 indicators: the research topic diversity, measured by the Author-Conference-Topic model and cosine, and the impact diversity, measured by the normalized standard deviation of h-indices. We find that the collaborators of high-impact researchers tend to study diverse research topics and have diverse h-indices. Moreover, by setting PhD graduation as an important milestone in researchers' careers, we examine several indicators related to scientific collaboration and their effects on a career. The results show that collaborating with authoritative authors plays an important role prior to a researcher's PhD graduation, but working with non-authoritative authors carries more weight after PhD graduation.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23911/full.
2Zhao, Y.(C.) ; Xu, X. ; Peng, X. ; Song, S.: Understanding the determinants and dynamic process of user exodus in social networking sites : evidence from Kaixin001.
In: Journal of the Association for Information Science and Technology. 69(2018) no.4, S.553-565.
Abstract: Understanding the factors and mechanism that affect the users' abandon behaviors is necessary for the sustained use of Social Networking Sites (SNSs). This study focuses on a special SNS discontinuance phenomenon-user exodus. Compared to individual discontinuance behavior studied in prior research, the SNS user exodus possesses its own characteristics: a huge magnitude of users abandon a given SNS product in a very short time. Given the fatal blow of exodus to SNS providers, this exploratory research seeks to unravel why and how the SNS user exodus occurs. Specifically, we conducted a mixed-method research combining laddering interview and network analysis. Drawing on the means-end chain theory, laddering interviews were first used to collect data from discontinuers of a Chinese SNS, Kaixin001, which has experienced a severe user dropout. Then we identified various factors triggering user exodus by content analysis. Last, network analysis was employed to establish the connections between various attributes, consequences, and values. The results showed that user exodus in SNS is strongly related to three types of value: functional, affective, and social value. More important, we also emphasized the dynamics process of exodus by highlighting the role of lurking. Possible contributions and implications of our findings are discussed.
Inhalt: Vgl.: https://onlinelibrary.wiley.com/doi/abs/10.1002/asi.23974.
3Zhao, Y. ; Ma, F. ; Xia, X.: Evaluating the coverage of entities in knowledge graphs behind general web search engines : Poster.
In: http://www.iskocus.org/NASKO2017papers/NASKO2017_paper_10.pdf [NASKO 2017, June 15-16, 2017, Champaign, IL, USA].
Abstract: Web search engines, such as Google and Bing, are constantly employing results from knowledge organization and various visualization features to improve their search services. Knowledge graph, a large repository of structured knowledge represented by formal languages such as RDF (Resource Description Framework), is used to support entity search feature of Google and Bing (Demartini, 2016). When a user searchs for an entity, such as a person, an organization, or a place in Google or Bing, it is likely that a knowledge cardwill be presented on the right side bar of the search engine result pages (SERPs). For example, when a user searches the entity Benedict Cumberbatch on Google, the knowledge card will show the basic structured information about this person, including his date of birth, height, spouse, parents, and his movies, etc. The knowledge card, which is used to present the result of entity search, is generated from knowledge graphs. Therefore, the quality of knowledge graphs is essential to the performance of entity search. However, studies on the quality of knowledge graphs from the angle of entity coverage are scant in the literature. This study aims to investigate the coverage of entities of knowledge graphs behind Google and Bing.
Inhalt: Beitrag bei: NASKO 2017: Visualizing Knowledge Organization: Bringing Focus to Abstract Realities. The sixth North American Symposium on Knowledge Organization (NASKO 2017), June 15-16, 2017, in Champaign, IL, USA.
Objekt: Google ; Bing
4Zhao, Y.W. ; Chi. C.-H. ; Heuvel, W.J. van den: Imperfect referees : reducing the impact of multiple biases in peer review.
In: Journal of the Association for Information Science and Technology. 66(2015) no.11, S.2340-2356.
Abstract: Bias in peer review entails systematic prejudice that prevents accurate and objective assessment of scientific studies. The disparity between referees' opinions on the same paper typically makes it difficult to judge the paper's quality. This article presents a comprehensive study of peer review biases with regard to 2 aspects of referees: the static profiles (factual authority and self-reported confidence) and the dynamic behavioral context (the temporal ordering of reviews by a single reviewer), exploiting anonymized, real-world review reports of 2 different international conferences in information systems / computer science. Our work extends conventional bias research by considering multiple biases occurring simultaneously. Our findings show that the referees' static profiles are more dominant in peer review bias when compared to their dynamic behavioral context. Of the static profiles, self-reported confidence improved both conference fitness and impact-based bias reductions, while factual authority could only contribute to conference fitness-based bias reduction. Our results also clearly show that the reliability of referees' judgments varies along their static profiles and is contingent on the temporal interval between 2 consecutive reviews.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23317/abstract.
5Zhang, J. ; Zhao, Y.: ¬A user term visualization analysis based on a social question and answer log.
In: Information processing and management. 49(2013) no.5, S.1019-1048.
Abstract: The authors of this paper investigate terms of consumers' diabetes based on a log from the Yahoo!Answers social question and answers (Q&A) forum, ascertain characteristics and relationships among terms related to diabetes from the consumers' perspective, and reveal users' diabetes information seeking patterns. In this study, the log analysis method, data coding method, and visualization multiple-dimensional scaling analysis method were used for analysis. The visual analyses were conducted at two levels: terms analysis within a category and category analysis among the categories in the schema. The findings show that the average number of words per question was 128.63, the average number of sentences per question was 8.23, the average number of words per response was 254.83, and the average number of sentences per response was 16.01. There were 12 categories (Cause & Pathophysiology, Sign & Symptom, Diagnosis & Test, Organ & Body Part, Complication & Related Disease, Medication, Treatment, Education & Info Resource, Affect, Social & Culture, Lifestyle, and Nutrient) in the diabetes related schema which emerged from the data coding analysis. The analyses at the two levels show that terms and categories were clustered and patterns were revealed. Future research directions are also included.
Inhalt: Vgl.: doi: 10.1016/j.ipm.2013.04.003.
6Ma, N. ; Guan, J. ; Zhao, Y.: Bringing PageRank to the citation analysis.
In: Information processing and management. 44(2008) no.2, S.800-810.
Abstract: The paper attempts to provide an alternative method for measuring the importance of scientific papers based on the Google's PageRank. The method is a meaningful extension of the common integer counting of citations and is then experimented for bringing PageRank to the citation analysis in a large citation network. It offers a more integrated picture of the publications' influence in a specific field. We firstly calculate the PageRanks of scientific papers. The distributional characteristics and comparison with the traditionally used number of citations are then analyzed in detail. Furthermore, the PageRank is implemented in the evaluation of research influence for several countries in the field of Biochemistry and Molecular Biology during the time period of 2000-2005. Finally, some advantages of bringing PageRank to the citation analysis are concluded.
Themenfeld: Citation indexing