1,747,396 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
El Tlacuache Núm. 956 (2020). 956 Año 19 (2020) octubre. El Tlacuache
No full textEl presente artículo, pretende ser el primero de una serie, en la cual se comenzará a estudiar el código de representación teotihuacano, a través de las piezas que pueden proceder de esta urbe y que forman parte de la colección Leof — Vinot.- Un discuros cronológico de la tradición teotihuacana por Jaime Francisco Machón y Giselle Canto Aguilar.Pirámides del sol y la lunaCaso Alfonso. Las estelas zapotecas. en Obras del
México Antiguo. Vol. 2. Mixtecas y Zapotecas.
El Colegio Nacional. México. 2003.Caso, Alfonso. El paraiso terrenal en Teotihuacán.
en Cuadernos Americanos No. 6. Vol VI. pp.
127 - 136. 1945Kubler, George. The iconography of the art of Teotihuacan.
Dumbarthon Oaks. Washington D.C.
1967López Austin Alfredo y Leonardo López Luján. Segunda
Edición. El pasado Indígena. Fondo de
Cultura Económica/ Colegio de México. México.
2001López Austin, Alfredo., Leonardo López Luján., y Sugiyama,
S. El templo de Quetzalcoatl en Teotihuacan.
Su posible significado ideológico.
en Anales Del Instituto De Investigaciones
Estéticas, 16(62), pp. 35-52. 199
Study of the decays K→μνe<SUP>+</SUP>e<SUP>-</SUP> and K→eνμ<SUP>+</SUP>μ<SUP>-</SUP>
No full textThe decays K→μνe+e- and K→eνμ+μ- have been discussed in a hard-meson model. The structure-dependent effects can be seen in the K→μνe+e- mode only at large values of the mass of the virtual photon. However, in K→eνμ+μ- decay the structure-dependent terms predominate, even though the branching ratio is small
Search for the decay b→X<SUB>s</SUB>μ<SUP>+</SUP>μ<SUP>-</SUP>
No full textWe have searched for the flavor-changing neutral current decay b→Xsμ+μ- in pp‾ collisions at √ s=1.8 TeV with the DØ detector at Fermilab. We determine the 90% confidence level limit for the branching fraction to be B(b→Xsμ+μ-) < 3.2×10-4. We argue that this limit is more stringent than the best published limit on this decay rate
Variations on the Author
Get PDF“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
B→Kμ<SUP>+</SUP>μ<SUP>-</SUP>: light higgs and fourth generation
No full textWe examine the current limit on the branching ratio for B→Kμ+μ- and the theoretical predictions for B→KH→Kμ+μ- in three- and four-generation models. It is shown that for a heavy top quark mt60 GeV a light Higgs, mH ≤ 3.5 GeV, is disfavoured in a three-generation model. We also find that the existence of a light Higgs constrains the four-generation model quite strongly through the above process
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
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