1,720,960 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
Efecto del Triclabendazol a dosis única contra la larva de Taenia solium (Cysticercus cellulosae) en cerdos infectados naturalmente
Full text linkEl complejo teniasis/cisticercosis es una enfermedad zoonótica importante en los países en vías de desarrollo. Es causada por las formas adulta y larvaria del cestodo Taenia solium. Los estudios más recientes, para evaluar la eficacia de diferentes antiparasitarios, han estado dirigidos contra el Cysticercus cellulosae, forma larvaria de la Taenia solium. Actualmente, está demostrado que algunos benzimidazoles tienen efecto en el tratamiento de la cisticercosis. Entre ellos, el Oxfendazol ha demostrado ser el mejor, por vía oral y a dosis única, sin embargo su uso desmesurado puede causar resistencia. Por otro lado, el Triclabendazol (TCBZ) es un benzimidazol que por su eficacia es utilizado con mayor frecuencia en el tratamiento de las helmintiasis en el ganado. El objetivo de este estudio fue evaluar el efecto del TCBZ contra el C. cellulosae en cerdos infectados naturalmente. Para ello, doce cerdos criollos infectados naturalmente con T. solium se dividieron en 2 grupos de 6 individuos cada uno. Al primer grupo se trató por vía oral con TCBZ, en una dosis única de 30 mg/kg de peso corporal y al segundo grupo se les administró un placebo (grupo control). Todos los animales se mantuvieron en las mismas condiciones de manejo. Los cerdos fueron sacrificados humanitariamente 17 semanas después del tratamiento. A la necropsia se evaluó principalmente la carga parasitaria y la viabilidad. Adicionalmente, se hizo un estudio histopatologico. Los resultados mostraron que no hubo diferencia significativa (p>0,05) entre el grupo TCBZ y el grupo control. Se concluye que el TCBZ no es efectivo contra la cisticercosis porcina.Tesi
Detección y caracterización molecular de huevos de Taenia solium en escarabajos colectados en zonas endémicas
Full text linkEl complejo taeniasis/cisticercosis por Taenia solium es una enfermedad parasitaria de importancia en salud pública. La transmisión de los huevos de la familia Taeniidae en el medio ambiente puede ocurrir de forma directa o indirecta. Entre las formas indirectas reportadas se encuentran los escarabajos. Experimentalmente, se ha demostrado que los escarabajos son excelentes portadores de huevos de T. solium; sin embargo, falta estudios en campo. Por ello, el presente estudio tuvo como objetivo detectar y secuenciar el gen mitocondrial COX 1 de huevos de T. solium en escarabajos colectados de una zona endémica a cisticercosis. En este estudio, se colectaron un total de 309 escarabajos, los cuales fueron agrupados en 54 muestras. Cada muestra correspondia a un punto geográfico, a un tiempo o a un género diferente y contenía entre 1 a 18 escarabajos. Se extrajo el ADN de cada muestra y luego se realizó un PCR anidado para amplificar el gen de la proteína oncosferal Tso31. Todas las muestras positivas al PCR anidado fueron amplificadas y secuenciadas para un fragmento del gen Citocromo C Oxidasa Subunidad 1 (COX 1). Siete de las 54 muestras fueron positivas a T. solium mediante la amplificación del gen Tso31. Sin embargo, solo dos (2/7) fueron compatibles con T. solium mediante la secuenciación parcial del gen COX 1. Se dectetó en el estudio, mediante secuenciación de un fragmento del gen COX 1, huevos de T. solium presente en escarabajos de una zona endémica a cisticercosis.Tesi
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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