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... al. (2005) used the VxInsight algorithm (Davidson et al., 1998) in order to map the whole journal structure as a representation of the structure of science. 3 However, the journal set remains fuzzy (=-=Bensman, 2001-=-) and therefore delineations are still based necessarily on trade-offs between accuracy, readability, and simplicity (Boyack et al., 2007). Klavans & Boyack (2007: 438) noted that a journal may occupy...

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...atterns, etc. (McVeigh, personal communication, 9 March 2006). 3sAn unambiguous categorization of the journal set in terms of subject matters seems impossible because of the fuzziness of the subsets (=-=Bensman, 2001-=-). In addition to intellectual categories, journals belong to nations, publishing houses, and often to more than a single discipline (Leydesdorff & Bensman, 2006). The potential “interdisciplinarity” ...

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...an kindly made his data available to me. The number of publications was added so that c/p ratios could also be calculated. Of course, this is not the place to publish Bensman’s (forthcoming) results (=-=Bensman, 2001-=-; Bensman & Wilder, 1998). However, a factor analysis of these variables teaches us that two factors explain some 82% of the variance. The two indices which are normalized for the number of publicatio...

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...e arranged in order of decreasing productivity of articles on a given subject, they may be divided into a nucleus of periodicals more particularly 8 devoted to the subject and several groups or zones containing the same number of articles as the nucleus, when the number of periodicals in the nucleus and succeeding zones will be as 1 : n : n2.... (p. 86). Bradford’s Law leads to a highly skewed distribution of articles on a given subject across journals with a small proportion of the journals accounting for most of the articles. Thus, Bradford’s figures for applied geophysics are summarized by Bensman (2001, p. 239) in the following manner: nucleus -9 journals (2.8%) accounting for 249 (32.2%) articles; first zone – 59 (18.1%) journals accounting for 499 (37.5%) articles; and second zone – 258 (79.1%) journals accounting for 404 (30.3%) articles. Analyzing the problem posed by Bradford’s Law for the indexing of science, Garfield (1971) noted in Current Contents that this law dictated that “no matter what the specialty, a relatively small core of journals will account for as much as 90% of the significant literature, while attempts to gather 100% of it will add journals to the core at an exponent...

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... algorithm. In other words, the vectors of the journal distribution span a multidimensional space in which clouds can be distinguished, but the delineation of these clouds remains fuzzy at the edges (=-=Bensman, 2001-=-) and varies with the perspectives chosen by the analyst. Leydesdorff & Cozzens (1993) developed a series of routines that generate aggregated journal-journal citation matrices on the basis of a seed ...