1,721,126 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Managing Uncertainty and Vagueness in Description Logics, Logic Programs and Description Logic Programs
No full textA Sequent Calculus for Reasoning in Four-valued Description Logics
No full textDescription Logics (DLs, for short) provide a logical reconstruction of the so-called frame-based knowledge representation languages
Description Logics with Fuzzy Concrete Domains
No full textWe present a fuzzy version of description logics with concrete domains. Main features are: (i) concept constructors are based on t-norm, t-conorm, negation and implication; (ii) concrete domains are fuzzy sets; (iii) fuzzy modifiers are allowed; and (iv) the reasoning algorithm is based on a mixture of completion rules and bounded mixed integer programming
Terminological Logics (TLs, variously known as Frame Representation Languages or Concept
No full textTerminological Logics are knowledge representation formalisms of considerable applicative interest, as they are speci cally oriented to the vast class of application domains that are describable by means of taxonomic organizations of complex objects. Although the eld of terminological logics has lately been an active area of investigation, few researchers (if any) have addressed the problem of extending these logics with the ability to perform default reasoning. Such extensions would prove of paramount applicative value, as for many application domains a formalization by means of monotonic terminological logics may be accomplished only at the price of oversimpli cation. In this paper we show how we can e ectively integrate terminological reasoning and default reasoning, yielding a terminological default logic. The kind of default reasoning we embed in our terminological logic is reminiscent of Reiter's Default Logic, but overcomes some of its drawbacks by subscribing to the \implicit" handling of exceptions typical of the Multiple Inheritance Networks with Exceptions proposed by Touretzky and others
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