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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
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
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
Los Alfareros Golondrinos. Productores Itinerantes en los Andes. Gabriel Ramón Joffré editor. 2013. IFEA Instituto Frances de estudios Andinos and Sequilao Editores. Lima. 167 pp. PEN30.00 (paper), ISBN 978-9972-623-81-3.
No full textAnálisis de la composición mineral de las vasijas de cerámica de Puerto Nuevo: algunas consideraciones preliminares sobre su producción y procedencia
No full textEl análisis de fragmentos de vasijas de cerámica del sitio de Puerto Nuevo (1000 a 500 a.C.), en la costa sur del Perú, revela la existencia de una producción diversificada y la probable existencia de redes de intercambio a larga distancia de vasijas de cerámica a lo largo de la costa durante la primera mitad del primer milenio antes de nuestra era. El examen macroscópico con lupa digital sobre cortes frescos realizado por Alejandro Rey de Castro permitió agrupar inicialmente los fragmentos en diferentes grupos de pasta, así como identificar varios fragmentos atípicos. A partir del análisis petrográfico de 120 láminas delgadas de estas cerámicas, Isabelle Druc refinó esta agrupación inicial en seis grupos de composición que brindan informaciones más detalladas sobre la producción y la procedencia de las vasijas de cerámica de las cuales provienen estos fragmentos. El análisis petrográfico de estas 120 láminas delgadas de fragmentos de cerámicas con 30 láminas delgadas de muestras de arcilla de los valles bajo y medio de los ríos Ica y Pisco, y del área de litoral entre lasdesembocaduras de ambos evidencia que la mayoría de las vasijas de cerámica estudiadas fueron producidas con sedimentos locales sin mucha selección granulométrica. Diversas fuentes de materias primas fueron explotadas, tanto en el área de litoral alrededor de Puerto Nuevo, como en los valles bajo y medio de los ríos Ica y Pisco. A partir de estos resultados, proponemos la existencia de varias comunidades de alfareros que trabajaban en la región de Puerto Nuevo —al menos, una caracterizada por el uso de una arcilla arenosa a la que no se agregaba temperante; otra, por el uso de una arcilla rica en algas carofitas; y otra a la que se le agregaba un temperante granodiorítico—. Trece fragmentos de vasijas de cerámica petrográficamente atípicos —con una composición, textura o cocción distintas a las de los grupos identificados para Puerto Nuevo— sugieren la existencia de otros modos de producción, mientras que el hecho de que en todos estos casos la composición sea de tipos costeños podría indicar la existencia de redes de intercambio de vasijas de cerámica preferentemente a lo largo de la costa, en lugar de entre la costa y la sierra.The analysis of ceramic fragments from the site of Puerto Nuevo (1000-500 AC), on the south coast of Peru, reveals a diversified ceramic production and possible long distance interaction networks for ceramics along the coast during the first half of the first millennium before our era. Macroscopic analysis with a hand-held digital low power microscope of fresh cross-sections conducted by Alejandro Rey de Castro allowed classifying the ceramics in different paste groups as well as identifying atypical ceramics. Petrographic analysis conducted by Isabelle Druc on 120 ceramic thin sections of these fragments helped refine this classification into six compositional groups, providing more details on the production and provenance of the wares. Comparison with 30 thin sections of clay-tiles collected in the lower and middle valley of the Ica and Pisco Rivers and on the littoral between the two rivers, showed that a majority of ceramics was manufacturedwith local sediments without much sorting. Different resource areas were exploited around Puerto Nuevo, on the littoral and in the Lower and Middle Ica and Pisco valleys. Based on these results, we propose the existence of severalcommunities of potters working in the Puerto Nuevo region. One (or more) of these communities must have used coastal sandy clays with no need to ad temper, another mined inland clay deposits with natural inclusions of charophyte algae, and other(s) used materials rich in granodioritic rock fragments. Thirteen atypical ceramics were singled out based on different composition, texture, or firing, suggesting other production modes. Their composition, however, still suggests a coastal provenance, indicating that the interaction network extended along the coast, rather than with the highlands
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Ceramic productions from the Cajamarca valley and high river basin of the Jequetepeque, Peru
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