Search (275 results, page 2 of 14)

  • × theme_ss:"Citation indexing"
  1. Wouters, P.; Vries, R. de: Formally citing the Web (2004) 0.02 
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    Abstract
    How do authors refer to Web-based information sources in their formal scientific publications? It is not yet weIl known how scientists and scholars actually include new types of information sources, available through the new media, in their published work. This article reports an a comparative study of the lists of references in 38 scientific journals in five different scientific and social scientific fields. The fields are sociology, library and information science, biochemistry and biotechnology, neuroscience, and the mathematics of computing. As is weIl known, references, citations, and hyperlinks play different roles in academic publishing and communication. Our study focuses an hyperlinks as attributes of references in formal scholarly publications. The study developed and applied a method to analyze the differential roles of publishing media in the analysis of scientific and scholarly literature references. The present secondary databases that include reference and citation data (the Web of Science) cannot be used for this type of research. By the automated processing and analysis of the full text of scientific and scholarly articles, we were able to extract the references and hyperlinks contained in these references in relation to other features of the scientific and scholarly literature. Our findings show that hyperlinking references are indeed, as expected, abundantly present in the formal literature. They also tend to cite more recent literature than the average reference. The large majority of the references are to Web instances of traditional scientific journals. Other types of Web-based information sources are less weIl represented in the lists of references, except in the case of pure e-journals. We conclude that this can be explained by taking the role of the publisher into account. Indeed, it seems that the shift from print-based to electronic publishing has created new roles for the publisher. By shaping the way scientific references are hyperlinking to other information sources, the publisher may have a large impact an the availability of scientific and scholarly information.
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    a
  2. H-Index auch im Web of Science (2008) 0.01 
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    Date
    6. 4.2008 19:04:22
    Type
    a
  3. Hayer, L.: Lazarsfeld zitiert : eine bibliometrische Analyse (2008) 0.01 
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    Abstract
    Um sich einer Antwort auf die Frage anzunähern, welche Bedeutung der Nachlass eines Wissenschaftlers wie jener Paul F. Lazarsfelds (mit zahlreichen noch unveröffentlichten Schriften) für die aktuelle Forschung haben könne, kann untersucht werden, wie häufig dieser Wissenschaftler zitiert wird. Wenn ein Autor zitiert wird, wird er auch genutzt. Wird er über einen langen Zeitraum oft genutzt, ist vermutlich auch die Auseinandersetzung mit seinem Nachlass von Nutzen. Außerdem kann aufgrund der Zitierungen festgestellt werden, was aus dem Lebenswerk eines Wissenschaftlers für die aktuelle Forschung relevant erscheint. Daraus können die vordringlichen Fragestellungen in der Bearbeitung des Nachlasses abgeleitet werden. Die Aufgabe für die folgende Untersuchung lautete daher: Wie oft wird Paul F. Lazarsfeld zitiert? Dabei interessierte auch: Wer zitiert wo? Die Untersuchung wurde mit Hilfe der Meta-Datenbank "ISI Web of Knowledge" durchgeführt. In dieser wurde im "Web of Science" mit dem Werkzeug "Cited Reference Search" nach dem zitierten Autor (Cited Author) "Lazarsfeld P*" gesucht. Diese Suche ergab 1535 Referenzen (References). Werden alle Referenzen gewählt, führt dies zu 4839 Ergebnissen (Results). Dabei wurden die Datenbanken SCI-Expanded, SSCI und A&HCI verwendet. Bei dieser Suche wurden die Publikationsjahre 1941-2008 analysiert. Vor 1956 wurden allerdings nur sehr wenige Zitate gefunden: 1946 fünf, ansonsten maximal drei, 1942-1944 und 1949 überhaupt keines. Zudem ist das Jahr 2008 noch lange nicht zu Ende. (Es gab jedoch schon vor Ende März 24 Zitate!)
    Date
    22. 6.2008 12:54:12
    Type
    a
  4. Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003) 0.01 
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    Abstract
    Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.
    Date
    9. 7.2006 10:22:35
    Type
    a
  5. Wildner, B.: Web of Science - Scopus : Auf der Suche nach Zitierungen (2006) 0.01 
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    Date
    4. 6.2006 17:22:15
    Type
    a
  6. Sandison, A.: Thinking about citation analysis (1989) 0.01 
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  7. Mendez, A.: Some considerations on the retrieval of literature based on citations (1978) 0.01 
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  8. Garfield, E.: Is citation analysis a legitime evaluation tool? (1979) 0.01 
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  9. Vinkler, P.: ¬A quasi-quantitative citation model (1987) 0.01 
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  10. Peritz, B.C.: Citation characteristics in library science : some further results from a bibliometric survey (1981) 0.01 
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  11. Garfield, E.: Citation indexes for science : a new dimension in documentation through association of ideas (1955) 0.01 
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  12. Malin, M.V.: ¬The Science Citation Index : a new concept in indexing (1968) 0.01 
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  13. Trivison, D.: Term co-occurrence in cited/citing journal articles as a measure of document similarity (1987) 0.01 
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  14. MacRoberts, M.H.; MacRoberts, B.R.: Problems of citation analysis : a critical review (1989) 0.01 
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  15. McCain, K.W.: Mapping authors in intellectual space : a technical overview (1990) 0.01 
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  16. MacRoberts, M.H.; MacRoberts, B.R.: Quantitative measures of communication in science : a study of the formal level (1986) 0.01 
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  17. Fujigaki, Y.: ¬The citation system : citation networks as repeatedly focusing on difference, continuous re-evaluation, and as persistent knowledge accumulation (1998) 0.00 
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    Abstract
    States that it can be shown that claims of a lack of theories of citation are also indicative of a great need for a theory which links science dynamics and measurement. There is a wide gap between qualitative (science dynamics) and quantitative (measurement) approaches. To link them, proposes the use of the citation system, that potentially bridges a gap between measurement and epistemology, by applying system theory to the publication system
    Footnote
    Contribution to a thematic issue devoted to 'Theories of citation?'
    Type
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  18. Bayer, A.E.; Smart, J.C.; McLaughlin, G.W.: Mapping intellectual structure of a scientific subfield through author cocitations (1990) 0.00 
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  19. Peritz, B.C.: ¬A classification of citation roles for the social sciences and related fields (1983) 0.00 
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  20. McCain, K.W.: Co-cited author mapping as a valid representation of intellectual structure (1986) 0.00 
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    Type
    a

Authors

Years

Languages

  • e 235
  • d 38
  • chi 2
  • More… Less…

Types

  • a 272
  • el 8
  • m 2
  • More… Less…

Themes

Subjects

Classifications