Search (11 results, page 1 of 1)

  • × author_ss:"Bookstein, A."
  • × theme_ss:"Informetrie"
  1. Bookstein, A.: Informetric distributions : I. Unified overview (1990) 0.05 
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    Date
    22. 7.2006 18:55:29
    Type
    a
  2. Bookstein, A.: Informetric distributions : II. Resilience to ambiguity (1990) 0.05 
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    Date
    22. 7.2006 18:55:55
    Type
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  3. Bookstein, A.: Scientometrics: new opportunities (1994) 0.00 
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  4. Bookstein, A.: ¬The bibliometric distributions (1976) 0.00 
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    Abstract
    One of the most surprising findings in the information sciences is the recurrence of a small number of frequency distributions. In this paper, these distributions are described, and a point of view is adopted that allows us to understand them a being different versions of a single distribution. The empirical distributions are shown to be special cases of a single theoretic distribution. It is found that when random fluctuations are introduced, the distributions are not strongly influenced
    Type
    a
  5. Bookstein, A.: Informetric distributions : III. Ambiguity (1997) 0.00 
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    Abstract
    This article examines various kinds of uncertainty. The notion of ambiguity is defined and contratsed with the more familiar notions of randomness and fuzziness. Functional forms resistant to ambiguity are defined, and it is shown how to incorporate a random component, that is itself also rsistant to ambiguity, into a resilent, but deterministic model
    Type
    a
  6. Bookstein, A.; Moed, H.; Yitzahki, M.: Measures of international collaboration in scientific literature : part I (2006) 0.00 
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    Abstract
    Research evaluating models of scientific productivity require coherent metrics that quantify various key relations among papers as revealed by patterns of citation. This paper focuses on the various conceptual problems inherent in measuring the degree to which papers tend to cite other papers written by authors of the same nationality. We suggest that measures can be given a degree of assurance of coherence by being based on mathematical models describing the citation process. A number of such models are developed.
    Type
    a
  7. Bookstein, A.; Raita, T.: Discovering term occurence structure in text (2001) 0.00 
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    Abstract
    This article examines some consequences for information control of the tendency of occurrences of contentbearing terms to appear together, or clump. Properties of previously defined clumping measures are reviewed and extended, and the significance of these measures for devising retrieval strategies discussed. A new type of clumping measure, which extends the earlier measures by permitting gaps within a clump, is defined, and several variants examined. Experiments are carried out that indicate the relation between the new measure and one of the earlier measures, as well as the ability of the two types of measure to predict compression efficiency
    Type
    a
  8. Bookstein, A.; Moed, H.; Yitzahki, M.: Measures of international collaboration in scientific literature : part II (2006) 0.00 
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    Abstract
    This paper continues the attempt of Part I to develop a coherent family of measures of influence between classes of documents, for example, language or nationality classes, as indicated by citation choice. In this paper we focus on situations in which there is some ambiguity as to how to assign items to a class. For simplicity, we change our focus from citations to co-authorship patterns, restricting most of our discussion to papers with two authors. Like the earlier paper, we propose very simple models of the citation decision, and base our measures on the parameters that appear in the model.
    Type
    a
  9. Bookstein, A.; Wright, B.: Ambiguity in measurement (1997) 0.00 
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    Abstract
    Gives an overview of the role of ambiguity in measurement and explores analytical methods for exploring its impact. Argues that certain functional forms are more resilient than others to problems of ambiguity, and that these should be preferred when ambiguity is a serious concern
    Type
    a
  10. Bookstein, A.: Implications of ambiguity for scientometric measurement (2001) 0.00 
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    Abstract
    Finally, Bookstein points to the ambiguity of our measurements that seems to present a structural impediment to the development of social science theory. Our theory always seems to be at an early stage, information science still at the frontier.
    Type
    a
  11. Swanson, D.R.; Smalheiser, N.R.; Bookstein, A.: Information discovery from complementary literatures : categorizing viruses as potential weapons (2001) 0.00 
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    Abstract
    Using novel informatics techniques to process the Output of Medline searches, we have generated a list of viruses that may have the potential for development as weapons. Our findings are intended as a guide to the virus literature to support further studies that might then lead to appropriate defense and public health measures. This article stresses methods that are more generally relevant to information science. Initial Medline searches identified two kinds of virus literaturesthe first concerning the genetic aspects of virulence, and the second concerning the transmission of viral diseases. Both literatures taken together are of central importance in identifying research relevant to the development of biological weapons. Yet, the two literatures had very few articles in common. We downloaded the Medline records for each of the two literatures and used a computer to extract all virus terms common to both. The fact that the resulting virus list includes most of an earlier independently published list of viruses considered by military experts to have the highest threat as potential biological weapons served as a test of the method; the test outcome showed a high degree of statistical significance, thus supporting an inference that the new viruses an the list share certain important characteristics with viruses of known biological
    Type
    a

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