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)
1Zhang, L. ; Wang, S. ; Liu, B.: Deep learning for sentiment analysis : a survey.
Abstract: Deep learning has emerged as a powerful machine learning technique that learns multiple layers of representations or features of the data and produces state-of-the-art prediction results. Along with the success of deep learning in many other application domains, deep learning is also popularly used in sentiment analysis in recent years. This paper first gives an overview of deep learning and then provides a comprehensive survey of its current applications in sentiment analysis.
2Zhang, L. ; Rousseau, R. ; Glänzel, W.: Diversity of references as an indicator of the interdisciplinarity of journals : taking similarity between subject fields into account.
In: Journal of the Association for Information Science and Technology. 67(2016) no.5, S.1257-1265.
Abstract: The objective of this article is to further the study of journal interdisciplinarity, or, more generally, knowledge integration at the level of individual articles. Interdisciplinarity is operationalized by the diversity of subject fields assigned to cited items in the article's reference list. Subject fields and subfields were obtained from the Leuven-Budapest (ECOOM) subject-classification scheme, while disciplinary diversity was measured taking variety, balance, and disparity into account. As diversity measure we use a Hill-type true diversity in the sense of Jost and Leinster-Cobbold. The analysis is conducted in 3 steps. In the first part, the properties of this measure are discussed, and, on the basis of these properties it is shown that the measure has the potential to serve as an indicator of interdisciplinarity. In the second part the applicability of this indicator is shown using selected journals from several research fields ranging from mathematics to social sciences. Finally, the often-heard argument, namely, that interdisciplinary research exhibits larger visibility and impact, is studied on the basis of these selected journals. Yet, as only 7 journals, representing a total of 15,757 articles, are studied, albeit chosen to cover a large range of interdisciplinarity, further research is still needed.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23487/abstract.
3Zhang, L. ; Olson, H.A.: Distilling abstractions : genre redefining essence versus context.
In: Library trends. 63(2015) no.3, S.540-554.
Abstract: The construction of concepts achieved by the apparently incompatible ideas of essence and context is examined through genre. Essence is defined by essential characteristics: innate, immutable, independent of context. Unlike essences, contexts are fluid, changing with time and location. Genre has the stability of the essential characteristics that define essence and the fluidity of differing circumstances that define context, thus making it effective for the exploration of essence and context. Controlled vocabularies reveal diachronically and synchronically the stable/fluid ambivalence of genre classes. The Dewey Decimal Classification (DDC1, DDC13, DDC23) exhibits stability (and modest fluidity) in the Divisions, the primary reflection of academic disciplines one hierarchical step below the main classes and the development of the standard subdivisions as a slow multi-edition evolution. Genre serves as a lens for us to better understand essences, contexts, and concepts and their manifestations, classes. Rather than being incompatible opposites, essences and contexts complement each other in the definition of concepts. How these abstractions relate to classification is a question both theoretical and practical to our efforts to further knowledge organization.
Inhalt: Beitrag in einem Themenheft: 'Exploring Philosophies of Information'.
Anmerkung: Vgl.: 10.1353/lib.2015.0015.
4Liu, X. ; Guo, C. ; Zhang, L.: Scholar metadata and knowledge generation with human and artificial intelligence.
In: Journal of the Association for Information Science and Technology. 65(2014) no.6, S.1187-1201.
Abstract: Scholar metadata have traditionally centered on descriptive representations, which have been used as a foundation for scholarly publication repositories and academic information retrieval systems. In this article, we propose innovative and economic methods of generating knowledge-based structural metadata (structural keywords) using a combination of natural language processing-based machine-learning techniques and human intelligence. By allowing low-barrier participation through a social media system, scholars (both as authors and users) can participate in the metadata editing and enhancing process and benefit from more accurate and effective information retrieval. Our experimental web system ScholarWiki uses machine learning techniques, which automatically produce increasingly refined metadata by learning from the structural metadata contributed by scholars. The cumulated structural metadata add intelligence and automatically enhance and update recursively the quality of metadata, wiki pages, and the machine-learning model.
5Zhang, L.: Linking information through function.
In: Journal of the Association for Information Science and Technology. 65(2014) no.11, S.2293-2305.
Abstract: How information resources can be meaningfully related has been addressed in contexts from bibliographic entries to hyperlinks and, more recently, linked data. The genre structure and relationships among genre structure constituents shed new light on organizing information by purpose or function. This study examines the relationships among a set of functional units previously constructed in a taxonomy, each of which is a chunk of information embedded in a document and is distinct in terms of its communicative function. Through a card-sort study, relationships among functional units were identified with regard to their occurrence and function. The findings suggest that a group of functional units can be identified, collocated, and navigated by particular relationships. Understanding how functional units are related to each other is significant in linking information pieces in documents to support finding, aggregating, and navigating information in a distributed information environment.
Themenfeld: Wissensrepräsentation ; Semantic Web
6Zhang, L. ; Thijs, B. ; Glänzel, W.: What does scientometrics share with other "metrics" sciences?.
In: Journal of the American Society for Information Science and Technology. 64(2013) no.7, S.1515-1518.
Abstract: In this article, the authors answer the question of whether the field of scientometrics/bibliometrics shares essential characteristics of "metrics" sciences. To achieve this objective, the citation network of seven selected metrics and their information environment is analyzed.
7Lee, H.-L. ; Zhang, L.: Tracing the conceptions and treatment of genre in Anglo-American cataloging.
In: Cataloging and classification quarterly. 51(2013) no.8, S.891-912.
Abstract: This study examines the conceptions and treatment of genre in four sets of modern Anglo-American cataloging rules spanning 171 years. Genre-related rules are first identified through "genre(s)," "form(s)," and "type(s)" keyword searches, and manual examination of the contents, then analyzed by level of treatment genre receives and by user tasks, as defined in the Functional Requirements for Bibliographic Records. While genre is found to be sporadically addressed across the rules, its significance has increased over time. In conclusion, the authors call for a rigorous and functional definition of genre and an integrated approach to genre in cataloging.
8Lai, M.-S. ; Fan, Z. ; Zhang, L.: ¬The development, current state, and effects of community informatization in mainland China : dreaming scientific order at the fin de siècle.
In: Library trends. 62(2013) no.1, S.13-33.
Abstract: In recent years, community informatization initiatives have developed throughout mainland China. The meaning of "community informatization" in China is similar to "community informatics" in the U.S. This paper aims to investigate the current state of community informatization in mainland China-with a focus on best practices, major challenges, patterns of development, developing trends, and effects. Comparing the theory and practice of China's community informatization to community informatics in other countries, especially in the U.S. and Europe, this paper asks: can government-sponsored or independent informatization efforts bridge the digital divide and help China realize digital-or information-equity?
Inhalt: Beitrag in einem Themenheft: 'Community Informatics in China'.
Anmerkung: Vgl.: 10.1353/lib.2013.0022.
9Zhang, L.: Grasping the structure of journal articles : utilizing the functions of information units.
In: Journal of the American Society for Information Science and Technology. 63(2012) no.3, S.469-480.
Abstract: Few studies have been done concerning document components and their effects on information use. This research empirically tested a taxonomy of functional units in a prototype journal system. This taxonomy was developed by identifying functions of the smallest information units within four journal article components (i.e., introduction, methods, results, discussion), and their associations with information tasks of using journal articles. Experimental results show that functional units can be utilized in supporting navigation, close reading, comprehension, and information use of journal articles to various extents. The results provide evidence that an individual functional unit has varying relevance to information use tasks, and has varying relevance to other functional units in the same or another component for a particular task. This research suggests that the information within a journal article can be organized and presented by functions to enhance effectiveness and efficiency in reading process and reading outcome.
10Glänzel, W. ; Rousseau, D. ; Zhang, L.: ¬A visual representation of relative first-citation times.
In: Journal of the American Society for Information Science and Technology. 63(2012) no.7, S.1420-1425.
Abstract: A new visual representation of the response time, i.e., the time elapsed between the publication year and the date of the first citation of a paper, is provided. This presentation can be used to detect and describe different paradigmatic types of reception speed for scientific journals.
11Zhang, L. ; Rousseau, R. ; Glänzel, W.: Document-type country profiles.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.7, S.1403-1411.
Abstract: A bibliometric method for analyzing and visualizing national research profiles is adapted to describe national preferences for publishing particular document types. Similarities in national profiles and national peculiarities are discussed based on the publication output of the 26 most active countries indexed in the Web of Science annual volume 2007.
12Wang, H. ; Liu, Q. ; Penin, T. ; Fu, L. ; Zhang, L. ; Tran, T. ; Yu, Y. ; Pan, Y.: Semplore: a scalable IR approach to search the Web of Data.
In: Web semantics: science, services and agents on the World Wide Web. 7(2009) no.3, S.177-188.
Abstract: The Web of Data keeps growing rapidly. However, the full exploitation of this large amount of structured data faces numerous challenges like usability, scalability, imprecise information needs and data change. We present Semplore, an IR-based system that aims at addressing these issues. Semplore supports intuitive faceted search and complex queries both on text and structured data. It combines imprecise keyword search and precise structured query in a unified ranking scheme. Scalable query processing is supported by leveraging inverted indexes traditionally used in IR systems. This is combined with a novel block-based index structure to support efficient index update when data changes. The experimental results show that Semplore is an efficient and effective system for searching the Web of Data and can be used as a basic infrastructure for Web-scale Semantic Web search engines.
Inhalt: Vgl.: http://www.sciencedirect.com/science/article/pii/S1570826809000262.
Themenfeld: Semantic Web ; Wissensrepräsentation
13Zhang, L. ; Liu, Q.L. ; Zhang, J. ; Wang, H.F. ; Pan, Y. ; Yu, Y.: Semplore: an IR approach to scalable hybrid query of Semantic Web data.
In: Proceeding ISWC'07/ASWC'07 : Proceedings of the 6th international The semantic web and 2nd Asian conference on Asian semantic web conference. Ed.: K. Aberer et al. Berlin : Springer, 2007. S.652-665.
(Lecture notes in computer science; 4825)
Abstract: As an extension to the current Web, Semantic Web will not only contain structured data with machine understandable semantics but also textual information. While structured queries can be used to find information more precisely on the Semantic Web, keyword searches are still needed to help exploit textual information. It thus becomes very important that we can combine precise structured queries with imprecise keyword searches to have a hybrid query capability. In addition, due to the huge volume of information on the Semantic Web, the hybrid query must be processed in a very scalable way. In this paper, we define such a hybrid query capability that combines unary tree-shaped structured queries with keyword searches. We show how existing information retrieval (IR) index structures and functions can be reused to index semantic web data and its textual information, and how the hybrid query is evaluated on the index structure using IR engines in an efficient and scalable manner. We implemented this IR approach in an engine called Semplore. Comprehensive experiments on its performance show that it is a promising approach. It leads us to believe that it may be possible to evolve current web search engines to query and search the Semantic Web. Finally, we briefy describe how Semplore is used for searching Wikipedia and an IBM customer's product information.
Inhalt: Vgl.: http://mathcs.emory.edu/~qliu26/docs/iswc07.pdf.
Themenfeld: Semantic Web ; Wissensrepräsentation