1,720,954 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
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
Bases teóricas para realizar la investigación de la influencia del uso del concreto reciclado como agregado sobre la resistencia a compresión y tracción del concreto en Trujillo, La Libertad 2019
No full textLa presente monografía busca obtener información técnica necesaria para elaborar la investigación: Influencia del uso del agregado reciclado con parámetros controlados sobre la resistencia a compresión del concreto en la ciudad de Trujillo, la libertad 2019
La presente investigación pretende reunir información para explicar la influencia del porcentaje y tamaño máximo nominal de concreto reciclado como sustituyente del agregado grueso, sobre la resistencia a la compresión de un concreto reciclado; a base de un cemento portland Tipo I .Los porcentajes de concreto reciclado adicionados fueron de 0%, 10%, 20 %, 30 %, 40% y 50 %, para tamaños máximos nominales del agregado grueso, y usando una relación agua/cemento de 0.56 con una resistencia de diseño de 210 kg/cm3.
En cuanto a los resultados de esta investigación se desea encontrar el porcentaje ideal de reemplazo es de 30% de agregado reciclado, además se determinó que las propiedades de este concreto (resistencia a la compresión), varían de 283.79 kg/cm2 a 281.74 kg/cm2 lo cual implica una reducción de menos del 5% con respecto al concreto tradicional (probeta patrón 0%).This monograph seeks to obtain the necessary technical information to prepare the research: Influence of the use of recycled aggregate with controlled parameters on the compressive strength of concrete in the city of Trujillo, la Libertad 2019
This research aims to gather information to explain the influence of the percentage and maximum nominal size of recycled concrete as a substitute for coarse aggregate, on the compressive strength of a recycled concrete; based on a Type I Portland cement. The percentages of recycled concrete added were 0%, 10%, 20%, 30%, 40% and 50%, for maximum nominal sizes of coarse aggregate, and using a water / cement ratio 0.56 with a design resistance of 210 kg / cm3.
As for the results of this research, it is desired to find the ideal replacement percentage is 30% recycled aggregate, in addition it was determined that the properties of this concrete (compressive strength) vary from 283.79 kg / cm2 to 281.74 kg / cm2 which implies a reduction of less than 5% with respect to traditional concrete (standard test tube 0%).Trabajo de investigació
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
Influencia del uso del agregado reciclado con parámetros controlados sobre la resistencia a compresión del concreto en la ciudad de Trujillo, La Libertad 2019.
No full textLa presente investigación se realizó en la Universidad Privada de Trujillo, se determinó la resistencia a la compresión de probetas de concreto reciclado con parámetros controlados.
En esta investigación se explica la influencia del porcentaje y tamaño máximo nominal de concreto reciclado como sustituyente del agregado grueso, sobre la resistencia a la compresión de un concreto reciclado; a base de un cemento portland Tipo I. Los porcentajes de concreto reciclado adicionados fueron de 0%, 10%, 20 %, 30 %, 40% y 50 %, para tamaños máximos nominales del agregado grueso, y usando una relación agua/cemento de 0.56 con una resistencia de diseño de 210 kg/cm3.
Se elaboró el diseño de mezcla en base a la caracterización de los materiales del concreto según método ACI 211, en estado fresco para el concreto: se realizó el ensayo de peso unitario según ASTM C 138, densidad del concreto (expresado en kg/cm3), luego se elaboraron 36 probetas (de 15 cm de diámetro y 30 cm de alturas) y se sometieron a curado por inmersión en agua durante 28 días según ASTM C 31, luego en estado endurecido para el concreto reciclado: se realizó el ensayo de resistencia a la compresión según ASTM C 39 para la determinación de la carga que soportará este concreto (expresada en kg/cm2), el problema es que en la ciudad de Trujillo hay grandes botaderos de concretos los cuales no son reusados por el desconocimiento de los parámetros de estos materiales.
En cuanto a los resultados de esta investigación se encontró porcentaje ideal de reemplazo es de 30% de agregado reciclado, además se determinó que las propiedades de este concreto (resistencia a la compresión), varían de 283.79 kg/cm2 a 281.74 kg/cm2 lo cual implica una reducción de menos del 5% con respecto al concreto tradicional (probeta patrón 0%).The present investigation was carried out at Private University of Trujillo, the compressive strength of recycled concrete samples with controlled parameters was determined.
This research explains the influence of the percentage and maximum nominal size of recycled concrete as a substituent of the coarse aggregate, on the compressive strength of a recycled concrete; based on a Type I portland cement. The percentages of recycled concrete added were 0%, 10%, 20%, 30%, 40% and 50%, for maximum nominal sizes of the coarse aggregate, and using a water / cement ratio of 0.56 with a design resistance of 210 kg / cm3.
The mix design was elaborated based on the characterization of the concrete materials according to method ACI 211, in fresh condition for the concrete: the unit weight test was carried out according to ASTM C 138, concrete density (expressed in kg / cm3 ), then 36 test pieces (15 cm in diameter and 30 cm in height) were prepared and subjected to curing by immersion in water for 28 days according to ASTM C 31, then in hardened state for the recycled concrete: the test was carried out compressive strength according to ASTM C 39 for the determination of the load that will support this concrete (expressed in kg / cm2), the problem is that in the city of Trujillo there are large dumps of concrete which are not reused due to the ignorance of the parameters of these materials.
Regarding the results of this research, it was found that 30% recycled concrete can be used, and it was determined that the properties of this concrete are from 283.79 kg/cm2 to 281.74 kg/cm2 which implies a reduction of less 5% with respect to traditional concrete (standard test tube 0%).Tesi
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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