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: 04. Juni 2021)
1Zhao, Y.C. ; Peng, X. ; Liu, Z. ; Song, S. ; Hansen, P.: Factors that affect asker's pay intention in trilateral payment-based social Q&A platforms : from a benefit and cost perspective.
In: Journal of the Association for Information Science and Technology. 71(2020) no.5, S.516-528.
Abstract: More and more social Q&A platforms are launching a new business model to monetize online knowledge. This monetizing process introduces a more complicated cost and benefit tradeoff to users, especially for askers' concerns. Much of the previous research was conducted in the context of free-based Q&A platform, which hardly explains the triggers that motivate askers' pay intention. Based on the theories of social exchange and social capital, this study aims to identify and examine the antecedents of askers' pay intention from the perspective of benefit and cost. We empirically test our predictions based on survey data collected from 322 actual askers in a well-known trilateral payment-based social Q&A platform in China. The results by partial least squares (PLS) analysis indicate that besides noneconomic benefits including self-enhancement, social support, and entertainment, financial factors such as cost and benefit have significant influences on the perceived value of using trilateral payment-based Q&A platforms. More important, we further identify that the effect of financial benefit is moderated by perceived reciprocity belief, and the effect of perceived value is moderated by perceived trust in answerers. Our findings contribute to the previous literature by proposing a theoretical model that explains askers' behavioral intention, and the practical implications for payment-based Q&A service providers and participants.
2Lu, W. ; Li, X. ; Liu, Z. ; Cheng, Q.: How do author-selected keywords function semantically in scientific manuscripts?.
In: Knowledge organization. 46(2019) no.6, S.403-418.
Abstract: Author-selected keywords have been widely utilized for indexing, information retrieval, bibliometrics and knowledge organization in previous studies. However, few studies exist con-cerning how author-selected keywords function semantically in scientific manuscripts. In this paper, we investigated this problem from the perspective of term function (TF) by devising indica-tors of the diversity and symmetry of keyword term functions in papers, as well as the intensity of individual term functions in papers. The data obtained from the whole Journal of Informetrics(JOI) were manually processed by an annotation scheme of key-word term functions, including "research topic," "research method," "research object," "research area," "data" and "others," based on empirical work in content analysis. The results show, quantitatively, that the diversity of keyword term function de-creases, and the irregularity increases with the number of author-selected keywords in a paper. Moreover, the distribution of the intensity of individual keyword term function indicated that no significant difference exists between the ranking of the five term functions with the increase of the number of author-selected keywords (i.e., "research topic" > "research method" > "research object" > "research area" > "data"). The findings indicate that precise keyword related research must take into account the dis-tinct types of author-selected keywords.
3Liu, Z. ; Jansen, B.J.: ASK: A taxonomy of accuracy, social, and knowledge information seeking posts in social question and answering.
In: Journal of the Association for Information Science and Technology. 68(2017) no.2, S.333-347.
Abstract: Many people turn to their social networks to find information through the practice of question and answering. We believe it is necessary to use different answering strategies based on the type of questions to accommodate the different information needs. In this research, we propose the ASK taxonomy that categorizes questions posted on social networking sites into three types according to the nature of the questioner's inquiry of accuracy, social, or knowledge. To automatically decide which answering strategy to use, we develop a predictive model based on ASK question types using question features from the perspectives of lexical, topical, contextual, and syntactic as well as answer features. By applying the classifier on an annotated data set, we present a comprehensive analysis to compare questions in terms of their word usage, topical interests, temporal and spatial restrictions, syntactic structure, and response characteristics. Our research results show that the three types of questions exhibited different characteristics in the way they are asked. Our automatic classification algorithm achieves an 83% correct labeling result, showing the value of the ASK taxonomy for the design of social question and answering systems.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23655/full.
4Jansen, B.J. ; Liu, Z. ; Simon, Z.: ¬The effect of ad rank on the performance of keyword advertising campaigns.
In: Journal of the American Society for Information Science and Technology. 64(2013) no.10, S.2115-2132.
Abstract: The goal of this research is to evaluate the effect of ad rank on the performance of keyword advertising campaigns. We examined a large-scale data file comprised of nearly 7,000,000 records spanning 33 consecutive months of a major US retailer's search engine marketing campaign. The theoretical foundation is serial position effect to explain searcher behavior when interacting with ranked ad listings. We control for temporal effects and use one-way analysis of variance (ANOVA) with Tamhane's T2 tests to examine the effect of ad rank on critical keyword advertising metrics, including clicks, cost-per-click, sales revenue, orders, items sold, and advertising return on investment. Our findings show significant ad rank effect on most of those metrics, although less effect on conversion rates. A primacy effect was found on both clicks and sales, indicating a general compelling performance of top-ranked ads listed on the first results page. Conversion rates, on the other hand, follow a relatively stable distribution except for the top 2 ads, which had significantly higher conversion rates. However, examining conversion potential (the effect of both clicks and conversion rate), we show that ad rank has a significant effect on the performance of keyword advertising campaigns. Conversion potential is a more accurate measure of the impact of an ad's position. In fact, the first ad position generates about 80% of the total profits, after controlling for advertising costs. In addition to providing theoretical grounding, the research results reported in this paper are beneficial to companies using search engine marketing as they strive to design more effective advertising campaigns.
5Liu, Z. ; Huang, X.: Gender differences in the online reading environment.
In: Journal of documentation. 64(2008) no.4, S.616-626.
Abstract: Purpose - The purpose of this study is to explore gender differences in the online reading environment. Design/methodology/approach - Survey and analysis methods are employed. Findings - Survey results reveal that female readers have a stronger preference for paper as a reading medium than male readers, whereas male readers exhibit a greater degree of satisfaction with online reading than females. Additionally, males and females differ significantly on the dimension of selective reading and sustained attention. Originality/value - Understanding gender differences would enable a better understanding of the changing reading behavior in the online environment, and to develop more effective digital reading devices. Factors affecting gender differences in the online reading environment are discussed, and directions for future research are suggested.
6Wan, G. ; Liu, Z.: Content-based information retrieval and digital libraries.
In: Information technology and libraries. 27(2008) no.1, S.41-47.
Abstract: This paper discusses the applications and importance of content-based information retrieval technology in digital libraries. It generalizes the process and analyzes current examples in four areas of the technology. Content-based information retrieval has been shown to be an effective way to search for the type of multimedia documents that are increasingly stored in digital libraries. As a good complement to traditional textbased information retrieval technology, content-based information retrieval will be a significant trend for the development of digital libraries.
7Liu, Z.: Print vs. electronic resources : a study of user perceptions, preferences, and use.
In: Information processing and management. 42(2006) no.2, S.583-592.
Abstract: The arrival and proliferation of electronic resources and digital libraries have a number of significant impacts on the use of print resources and traditional libraries. This study explores the extent to which graduate students in a metropolitan university setting use print and electronic resources. Reading preferences and use of print and electronic resources vary among different disciplines. Graduate students seem to expect a hybrid of print and electronic resources. They desire to meet their information needs through a mix of print and online resources, even though reasons for supplementing another type of resource differ. Circumstances that affect the selection of use between digital libraries and traditional libraries are also discussed.
9Liu, Z.: Reading behavior in the digital environment : changes in reading behavior over the past ten years.
In: Journal of documentation. 61(2005) no.6, S.700-712.
Abstract: Purpose - This study attempts to investigate reading behavior in the digital environment by analyzing how people's reading behavior has changed over the past ten years. Design/methodology/approach - Survey and analysis methods are employed. Findings - With an increasing amount of time spent reading electronic documents, a screen-based reading behavior is emerging. The screen-based reading behavior is characterized by more time spent on browsing and scanning, keyword spotting, one-time reading, non-linear reading, and reading more selectively, while less time is spent on in-depth reading, and concentrated reading. Decreasing sustained attention is also noted. Annotating and highlighting while reading is a common activity in the printed environment. However, this "traditional" pattern has not yet migrated to the digital environment when people read electronic documents. Originality/value - Implications for the changes in reading behavior are discussed, and directions for future research are suggested.
Anmerkung: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/00220410510632040
10Theng, Y.-L. ; Goh, D.H.-L. ; Lim, E.-P. ; Liu, Z. ; Yin, M. ; Pang, N.L.-S. ; Wong, P.B.-B.: Applying scenario-based design and claims analysis to the design of a digital library of geography examination resources.
In: Information processing and management. 41(2005) no.1, S.23-40.
Abstract: This paper describes the application of Carroll's scenario-based design and claims analysis as a means of refinement to the initial design of a digital library of geographical resources (GeogDL) to prepare Singapore students to take a national examination in geography. GeogDL is built on top of G-Portal, a digital library providing services over geospatial and georeferenced Web content. Beyond improving the initial design of GeogDL, a main contribution of the paper is making explicit the use of Carroll's strong theory-based but undercapitalized scenario-based design and claims analysis that inspired recommendations for the refinement of GeogDL. The paper concludes with an overview of the implementation of some of the recommendations identified in the study to address "usability" and "usefulness" design issues in GeogDL, and discusses implications of the findings in relation to geospatial digital libraries in general.
Themenfeld: Information Gateway
11Lim, E.-P. ; Liu, Z. ; Yin, M. ; Goh, D.H.-L. ; Theng, Y.-L. ; Ng, W.K.: On organizing and accessing geospatial and georeferenced Web resources using the G-Portal system.
In: Information processing and management. 41(2005) no.5, S.1277-1298.
Abstract: In order to organise and manage geospatial and georeferenced information on the Web making them convenient for searching and browsing, a digital portal known as G-Portal has been designed and implemented. Compared to other digital libraries, G-Portal is unique for several of its features. It maintains metadata resources in XML with flexible resource schemas. Logical groupings of metadata resources as projects and layers are possible to allow the entire metadata collection to be partitioned differently for users with different information needs. These metadata resources can be displayed in both the classification-based and map-based interfaces provided by G-Portal. G-Portal further incorporates both a query module and an annotation module for users to search metadata and to create additional knowledge for sharing respectively. G-Portal also includes a resource classification module that categorizes resources into one or more hierarchical category trees based on user-defined classification schemas. This paper gives an overview of the G-Portal design and implementation. The portal features will be illustrated using a collection of high school geography examination-related resources.
12Liu, Z.: ¬The evolution of documents and its impacts.
In: Journal of documentation. 60(2004) no.3, S.279-288.
Abstract: This article examines the evolution of documents and its impacts from the following aspects: information density, longevity, uniqueness, duplicability, mobility, connectivity, and integration. It focuses on the consequences of the shift from printed media to digital media. By looking back on their evolution, we are able to see how the notions and functions of documents change over time, and the resulting impacts on individuals, organizations, and society.
Anmerkung: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/00220410410534185.
13Liu, Z.: Citation theories in the framework of international flow of information : new evidence with translation analysis.
In: Journal of the American Society for Information Science. 48(1997) no.1, S.80-87.
Abstract: Citation is a worldwide phenomenon. It needs to be considered in the international context. This study examines 4 common modalities (physical accessibility, cognitive accessibility, perceived quality, and perceived importance) underlying the complex citation practice by translation analysis. In an analysis of the Chinese literature in library and information science, it was found that there is a very strong correlation between languages cited and languages translated (r=0.978). The overall national citation pattern of foreign publications is highly correlated with its translation pattern (r=0.897). There is approximately 57% overlap between the group of the 60 most heavily cited authors and the group of the 60 most frequently translated authors. Highly cited publications are more likely to be translated (54.5 vs. 13.8%)
14Rada, R. ; Liu, Z. ; Zheng, M.: Connecting educational information spaces.
In: Knowledge organization. 24(1997) no.3, S.154-162.
Abstract: Online textbooks can be connected to other sources of information to improve their educational value. We describe 2 case studies. One used in a medical textbook and connected to medical journal abstracts via a thesaurus. The textbook, journal abstracts, and thesaurus were stored on a CD-ROM. The other case study shows a textbook on the WWW that is connected to various other sources of information. About half the book references are to web sites, and the textbook is part of an online course that is connected to an online catalog and other courses. Such linkages among information spaces should help students navigate the information relevant to their studies
15Liu, Z.: Dissipative structure theory, synergetics, and their implications for the management of information systems.
In: Journal of the American Society for Information Science. 47(1996) no.2, S.129-135.
Abstract: Dissipative structure theory and synergetics are applied in the management of information systems. Briefly reviews dissipative structure theory and synergetics, and demonstrates why they could be applied in information systems. Orderliness is pervasive and of central importance in the operation of information systems. Information science can be regarded as a science about knowledge ordering with the goal of making information more accessible to potential users. Analyzes 5 types of entropy in information systems. Discusses the relationship betweem dissipative structure theory and traditional management theories. Examines implications for the management of information systems
Themenfeld: Information Resources Management
16Buckland, M.K. ; Liu, Z.: History of information science.
In: Annual review of information science and technology. 30(1995), S.385-416.
Abstract: State of the art review of the historical development of information science as deemed to be covered by the particular interests of memebers of the American Society for Information Science, as defined as the representation, storage, transmission, selection, retrieval, filtering, and use of documents and messages. Arranges the references cited roughly according to the classification scheme used by Information Science Abstracts, and so uses the headings: background; information science; techniques and technology; information related behaviour; application areas; social aspects; education for information science; institutions; individuals; geographical areas; and conclusions