-
Antonakis, J.; Lalive, R.: Quantifying scholarly impact : IQp versus the Hirsch h (2008)
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- Abstract
- Hirsch's (2005) h index of scholarly output has generated substantial interest and wide acceptance because of its apparent ability to quantify scholarly impact simply and accurately. We show that the excitement surrounding h is premature for three reasons: h stagnates with increasing scientific age; it is highly dependent on publication quantity; and it is highly dependent on field-specific citation rates. Thus, it is not useful for comparing scholars across disciplines. We propose the scholarly index of quality and productivity (IQp) as an alternative to h. The new index takes into account a scholar's total impact and also corrects for field-specific citation rates, scholarly productivity, and scientific age. The IQp accurately predicts group membership on a common metric, as tested on a sample of 80 scholars from three populations: (a) Nobel winners in physics (n = 10), chemistry (n = 10), medicine (n = 10), and economics (n = 10), and towering psychologists (n = 10); and scholars who have made more modest contributions to science including randomly selected (b) fellows (n = 15) and (c) members (n = 15) of the Society of Industrial and Organizational Psychology. The IQp also correlates better with expert ratings of greatness than does the h index.
-
Stojanovic, N.: Ontology-based Information Retrieval : methods and tools for cooperative query answering (2005)
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- Content
- Vgl.: http%3A%2F%2Fdigbib.ubka.uni-karlsruhe.de%2Fvolltexte%2Fdocuments%2F1627&ei=tAtYUYrBNoHKtQb3l4GYBw&usg=AFQjCNHeaxKkKU3-u54LWxMNYGXaaDLCGw&sig2=8WykXWQoDKjDSdGtAakH2Q&bvm=bv.44442042,d.Yms.
-
Chau, M.; Lu, Y.; Fang, X.; Yang, C.C.: Characteristics of character usage in Chinese Web searching (2009)
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- Abstract
- The use of non-English Web search engines has been prevalent. Given the popularity of Chinese Web searching and the unique characteristics of Chinese language, it is imperative to conduct studies with focuses on the analysis of Chinese Web search queries. In this paper, we report our research on the character usage of Chinese search logs from a Web search engine in Hong Kong. By examining the distribution of search query terms, we found that users tended to use more diversified terms and that the usage of characters in search queries was quite different from the character usage of general online information in Chinese. After studying the Zipf distribution of n-grams with different values of n, we found that the curve of unigram is the most curved one of all while the bigram curve follows the Zipf distribution best, and that the curves of n-grams with larger n (n = 3-6) had similar structures with ?-values in the range of 0.66-0.86. The distribution of combined n-grams was also studied. All the analyses are performed on the data both before and after the removal of function terms and incomplete terms and similar findings are revealed. We believe the findings from this study have provided some insights into further research in non-English Web searching and will assist in the design of more effective Chinese Web search engines.
- Date
- 22.11.2008 17:57:22
-
BS 8723: Structured vocabularies for information retrieval - guide : Part 1: Definitions, symbols and abbreviations. Part 2: Thesauri (2005)
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- Footnote
- Rez. in: Journal of Documentation 63(2007) no.3, S.428-431 (J. Rowley).
- Type
- n
-
Robertson, S.; Tait, J.: In Memoriam Karen Sparck Jones (2007)
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- Date
- 26.12.2007 14:22:47
-
Cronin, J.: Social influences on quantum mechanics? : I (2001)
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- Footnote
- Erwiderung auf: Graham, L.R.: Do mathematical equations display social attributes? in: Mathematical intelligencer 22(2000) no.3, S.31-36
-
Dewdney, A.K.: Reise in das Innere der Mathematik (2000)
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- Date
- 19. 7.2002 22:04:42
- Footnote
- Rez. in: Frankfurter Rundschau Nr.144 vom 24.6.2000, S.6 (J. Pade)
-
Wusteman, J.: Patently ridiculous (2004)
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- Source
- Library hi tech. 22(2004) no.2, S.231-237
-
Qin, J.; Paling, S.: Converting a controlled vocabulary into an ontology : the case of GEM (2001)
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- Date
- 24. 8.2005 19:20:22
-
Boteram, F.; Hubrich, J.: Towards a comprehensive international Knowledge Organization System (2008)
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- Date
- 22. 9.2008 19:30:41
-
Egghe, L.: Relations between the continuous and the discrete Lotka power function (2005)
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- Abstract
- The discrete Lotka power function describes the number of sources (e.g., authors) with n = 1, 2, 3, ... items (e.g., publications). As in econometrics, informetrics theory requires functions of a continuous variable j, replacing the discrete variable n. Now j represents item densities instead of number of items. The continuous Lotka power function describes the density of sources with item density j. The discrete Lotka function one obtains from data, obtained empirically; the continuous Lotka function is the one needed when one wants to apply Lotkaian informetrics, i.e., to determine properties that can be derived from the (continuous) model. It is, hence, important to know the relations between the two models. We show that the exponents of the discrete Lotka function (if not too high, i.e., within limits encountered in practice) and of the continuous Lotka function are approximately the same. This is important to know in applying theoretical results (from the continuous model), derived from practical data.
-
Cheng, C.-S.; Chung, C.-P.; Shann, J.J.-J.: Fast query evaluation through document identifier assignment for inverted file-based information retrieval systems (2006)
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- Abstract
- Compressing an inverted file can greatly improve query performance of an information retrieval system (IRS) by reducing disk I/Os. We observe that a good document identifier assignment (DIA) can make the document identifiers in the posting lists more clustered, and result in better compression as well as shorter query processing time. In this paper, we tackle the NP-complete problem of finding an optimal DIA to minimize the average query processing time in an IRS when the probability distribution of query terms is given. We indicate that the greedy nearest neighbor (Greedy-NN) algorithm can provide excellent performance for this problem. However, the Greedy-NN algorithm is inappropriate if used in large-scale IRSs, due to its high complexity O(N2 × n), where N denotes the number of documents and n denotes the number of distinct terms. In real-world IRSs, the distribution of query terms is skewed. Based on this fact, we propose a fast O(N × n) heuristic, called partition-based document identifier assignment (PBDIA) algorithm, which can efficiently assign consecutive document identifiers to those documents containing frequently used query terms, and improve compression efficiency of the posting lists for those terms. This can result in reduced query processing time. The experimental results show that the PBDIA algorithm can yield a competitive performance versus the Greedy-NN for the DIA problem, and that this optimization problem has significant advantages for both long queries and parallel information retrieval (IR).
-
Knowledge organization for a global learning society : Proceedings of the 9th International ISKO Conference, 4-7 July 2006, Vienna, Austria (2006)
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- Content
- Enthält die Beiträge: Zins, C.: Knowledge map of information science: issues, principles, implications. - Lin, X., S. Aluker u. W. Zhu u.a.: Dynamic concept representation through a visual concept explorer. - Kohlbacher, F.: Knowledge organization(s) in Japan: empirical evidence from Japanese and western corporations. - Beghtol, C.: The global learning society and the iterative relationship between theory and practice in knowledge organization systems. - Tennis, J.T.: Function, purpose, predication, and context of information organization frameworks. - Doyle, A.: Naming and reclaiming knowledges in public intersections of landscapes and experience. - Qin, J., P. Creticos u. W.Y. Hsiao: Adaptive modeling of workforce domain knowledge. - Gnoli, C.: The meaning of facets in non-disciplinary classifications. - Loehrlein, A., E.K. Jacob u. S. Lee u.a.: Development of heuristics in a hybrid approach to faceted classification. - Thellefsen, M.: The dynamics of information representation and knowledge mediation. - LaBarre, K.: A multi faceted view: use of facet analysis in the practice of website organization and access. - Smiraglia, R.P.: Empiricism as the basis for metadata categorisation: expanding the case for instantiation with archival documents. - Bean, C.A.: Hierarchical relationships used in mapping between knowledge structures. - Friedman, A.: Concept mapping a measurable sign. - Naumis Pena, C.: Evaluation of educational thesauri. - Biagetti, M.T.: Indexing and scientific research needs. - Robert, C.A., A. Davis: Annotation and its application to information research in economic intelligence. - Mcllwaine, I.C., J.S. Mitchel: The new ecumenism: exploration of a DDC / UDC view of religion. - Hajdu Barát, A.: Usability and the user interfaces of classical information retrieval languages. - Eito Brun, R.: Uncovering hidden clues about geographic visualization in LCC. - Williamson, N.J.: Knowledge structures and the Internet progress and prospects. - Pajarillo, E.J.Y.: A classification scheme to determine medical necessity: a knowledge organization global learning application. - López-Huertas, M.J.: Thematic map of interdisciplinary domains based on their terminological representation: the gender studies. - Rodriguez Bravo, B.: The visibility of women in indexing languages. - Beall, J., D. Vizine-Goetz: Finding fiction: facilitating access to works of the imagination scattered by form and format. - Kwasnik, B.H., Y.L. Chun u. K. Crowston u.a.: Challenges in ceating a taxonomy of genres of digital documents. - Simon, J.: Interdisciplinary knowledge creation: using wikis in science. - Gabel, J.: Improving information retrieval of subjects through citation-analysis: a study. - Lee, H.L.: Navigating hierarchies vs. searching by keyword: two cultural perspectives. - Loehrlein, A., R. Martin u. E.L. Robertson: Integration of international standards in the domain of manufacturing enterprise. -
Dervos, D.A., A. Coleman: A common sense approach to defining data, information, and metadata. - Keränen, S.: Equivalence and focus of translation in multicultural thesaurus construction. - Dabbadie, M., J.M. Blancherie: Alexandria, a multilingual dictionary for knowledge management purposes. - Rosemblat, G., L. Graham: Cross-language search in a monolingual health information system: flexible designs and lexical processes. - Garcia Marco, F.J.: Understanding the categories and dynamics of multimedia information: a model for analysing multimedia information. - Afolabi, B., O. Thiery: Using users' expectations to adapt business intelligence systems. - Zimmermann, K., J. Mimkes u. H.U. Kamke: An ontology framework for e-learning in the knowledge society. - Jacob, E.K., H. Albrechtsen u. N. George: Empirical analysis and evaluation of a metadata scheme for representing pedagogical resources in a digital library for educators. - Breitenstein, M.: Global unity: Otto Neurath and the International Encyclopedia of United Science. - Andersen, J.: Social change, modernity and bibliography: bibliography as a document and a genre in the global learning society. - Miksa, S.D., WE. Moen u. G. Snyder u.a.: Metadata assistance of the Functional Requirements for Bibliographic Record's four user tasks: a report on the MARC content designation utilization (MCDU) project. - Salaba, A., M.L. Zeng u. M. Zumer: Functional Requirements for Subject Authority Records. - Frâncu, V.: Subjects in FRBR and poly-hierarchical thesauri as possible knowledge organization tools. - Peschl, M.F.: Knowledge-oriented educational processes from knowledge transfer to collective knowledge creation and innovation. - Miller, S.J., M.J. Fox u. H.L. Lee u.a.: Great expectations: professionals' perceptions and knowledge organization curricula. - Pajarillo, E.J.Y.: A qualitative research on the use of knowledge organization in nursing information behavior.
- Date
- 27.12.2008 11:22:36
-
Egghe, L.: Empirical and combinatorial study of country occurrences in multi-authored papers (2006)
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- Abstract
- Papers written by several authors can be classified according to the countries of the author affiliations. The empirical part of this paper consists of two datasets. One dataset consists of 1,035 papers retrieved via the search "pedagog*" in the years 2004 and 2005 (up to October) in Academic Search Elite which is a case where phi(m) = the number of papers with m =1, 2,3 ... authors is decreasing, hence most of the papers have a low number of authors. Here we find that #, m = the number of times a country occurs j times in a m-authored paper, j =1, ..., m-1 is decreasing and that # m, m is much higher than all the other #j, m values. The other dataset consists of 3,271 papers retrieved via the search "enzyme" in the year 2005 (up to October) in the same database which is a case of a non-decreasing phi(m): most papers have 3 or 4 authors and we even find many papers with a much higher number of authors. In this case we show again that # m, m is much higher than the other #j, m values but that #j, m is not decreasing anymore in j =1, ..., m-1, although #1, m is (apart from # m, m) the largest number amongst the #j,m. The combinatorial part gives a proof of the fact that #j,m decreases for j = 1, m-1, supposing that all cases are equally possible. This shows that the first dataset is more conform with this model than the second dataset. Explanations for these findings are given. From the data we also find the (we think: new) distribution of number of papers with n =1, 2,3,... countries (i.e. where there are n different countries involved amongst the m (a n) authors of a paper): a fast decreasing function e.g. as a power law with a very large Lotka exponent.
-
Sühl-Strohmenger, W.: "Now or never! Whatever, wherever. .. !?" : Determinanten zukunftsorientierter Informationspraxis in wissenschaftlichen Bibliotheken und die Bedeutung professioneller Informationsarchitekturen (2009)
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- Abstract
- Die Informationspraxis von Studierenden und Wissenschaftler(inne)n im Kontext wissenschaftlicher Bibliotheken wandelt sich unter den Vorzeichen der digitalen Informationswelt tiefgreifend, weist jedoch nicht nur in Richtung auf den aktiven Web 2.0-Nutzer bzw. den "Internetnutzer von morgen", wie es bisweilen den Anschein hat. Die durch die komplexen Anforderungen neuer Studiengänge stark beanspruchten Studierenden wie auch die unter hohem Konkurrenz- und Erfolgsdruck forschenden Wissenschaftler(inne)n benötigen vielmehr die Bibliotheken mit ihren professionellen Services und in ihrer Rolle als "Navigatoren im Wissensozean" mehr denn je. Bei ihren Hauptnutzungsgruppen - Studierenden und Wissenschaftler(inne)n - genießen die wissenschaftlichen Bibliotheken gerade wegen ihrer verlässlichen, auf Kontinuität angelegten Kernaufgaben der Beschaffung (auch Lizenzierung) der für Studium und Forschung wesentlichen Medien und Ressourcen, deren professioneller Erschließung und Bereitstellung, sodann wegen der Unterstützung des wissenschaftlichen Publizierens, wegen ihres Angebots bedarfsorientierter (Fach-) Informationsdienste und ihrer auf die konkreten Arbeits- und Lernbedürfnisse abgestimmten Informationsinfrastrukturen nach wie vor hohe Reputation. Dies belegen die Befunde nahezu aller wesentlichen neueren Nutzerstudien im deutschsprachigen Raum wie auch langjährige Erfahrungen im Zusammenhang mit Kursen zur Vermittlung von Informationskompetenz. Der Vortrag thematisiert die Bedeutung bibliothekarisch gestalteter Informationsarchitekturen für professionelle wissenschaftliche Informationsarbeit im Licht des empirisch nachweisbaren Nutzerbedarfs und Informationsverhaltens.
- Date
- 22. 8.2009 19:51:28
23. 8.2009 11:22:11
-
Rostaing, H.; Barts, N.; Léveillé, V.: Bibliometrics: representation instrument of the multidisciplinary positioning of a scientific area : Implementation for an Advisory Scientific Committee (2007)
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- Date
- 30.12.2007 11:22:39
-
Hori, M.; Euzenat, J.; Patel-Schneider, P.F.: OWL Web Ontology Language XML Presentation Syntax (2003)
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- Type
- n
-
OWL Web Ontology Language Use Cases and Requirements (2004)
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- Editor
- Heflin, J.
- Type
- n
-
McMann Kramer, M.; Hopkins, J.: ¬An interview with Judith Hopkins (2005)
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- Source
- Cataloging and classification quarterly. 41(2005) no.1, S.5-22
-
Walker, J.: SilverPlatter Information : Integration of information resources (2000)
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- Date
- 22. 7.2000 17:39:40
