1,721,031 research outputs found
Probst, Peter. Osogbo and the Art of Heritage. Monuments, Deities, and Money.
No full textProbst, Peter. — Osogbo and the Art of Heritage. Monuments, Deities, and Money. Indianapolis, Indiana University Press, 2011, 207 p., bibl., ill. Plusieurs thématiques parcourent le livre de l'anthropologue allemand (professeur à la Tufts University) Peter Probst, Osogbo and the Art of Heritage, mais une problématique se dégage et structure l'ensemble : la notion d'héritage. L'auteur aborde un aspect désormais bien documenté de l'histoire de l'art moderne en Afrique, celle d'Osogbo — ville ..
Cut Elimination in Sequent Calculi with Implicit Contraction, with a Conjecture on the Origin of Gentzen's Altitude Line Construction
No full textSequent calculi are given in which contexts represent finite sets of formulas. Standard cut elimination will not work if the principal formula of a logical rule is already found in a premiss, i.e., if there is an implicit contraction on it. A procedure is given in which cut with the original cut formula is first permuted up, followed by cuts on its immediate subformulas. It is next adapted to sequent calculi with multisets and explicit contraction, by which Gentzen's mix rule trick is avoided, a procedure strikingly similar to the peculiar "altitude line" construction that Gentzen used in his second proof of the consistency of arithmetic in 1938. The conjecture is close at hand that this is indeed the way Gentzen originally proved cut elimination in 1933
A General View on Normal Form Theorems for Łukasiewicz Logic with Product
No full textIn this survey paper we explore the connection between the Pierce-
Birkhoff conjecture and Lukasiewicz logic with product. Conservative extensions
of Lukasiewicz logic can be defined by adding an internal product
or a multiplication with scalars from [0; 1]. The corresponding models reflect an algebraic hierarchy of lattice-ordered structures, from groups to
algebras. We prove a general version of the normal form theorem and we
state a local version of the Pierce-Birkhoff conjecture
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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