1,720,967 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
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
La construcción del lenguaje en Química: del átomo al sistema periódico
No full text[ES] Uno de los principales objetivos más ambiciosos de las ciencias es lograr una descripción total del mundo
que nos rodea y traducirlo al lenguaje cotidiano. Ante la inmensidad aparente de la Tabla Periódica, ésta
constituye el pilar fundamental que ha favorecido la construcción de un lenguaje Químico universal. Es
por ello que, el aprendizaje consciente de la misma y de todo lo que involucra es, en parte, la clave para
superar con éxito la comprensión de la materia. Ante dicho reto, este Trabajo Fin de Máster presenta una
propuesta para el desarrollo de la Unidad Didáctica “El átomo y Sistema Periódico” de la materia Física y
Química, destinada al alumnado de 4o de Educación Secundaria Obligatoria, desde una perspectiva
alejada de lo tradicional. Para tal fin, en primer lugar, se ha realizado una revisión epistemológica sobre el
origen y evolución de los átomos y elementos, hasta llegar a la actual Tabla Periódica. A continuación, se
desarrolla una programación didáctica en la que se ofrecen una gran variedad de actividades cuyo
objetivo es el fomento del interés del alumnado, haciéndolo partícipe de su propio aprendizaje y, sobre
todo, potenciando el desarrollo de numerosas capacidades y habilidades sociales.[EN] One of the most ambitious goals of science is to achieve a complete description of the world that
surrounds us and to translate it into everyday language. Given the apparent immensity of the Periodic
Table, it constitutes the main basis that has encouraged the construction of a universal chemical language.
For this reason, conscious learning of the Periodic Table and all that it involves is, partially, the key to
successfully overcoming the understanding of the subject. Faced with this challenge, this Master's Thesis
presents a proposal for the development of the didactic unit "The atom and Periodic System" of the
subject Physics and Chemistry, aimed at students in the 4th grade of Compulsory Secondary Education,
from a non-traditional perspective. To this end, firstly, an epistemological review has been carried out
regarding the origin and evolution of atoms and elements, up to the current Periodic Table. Next, a
didactic program is developed in which a wide variety of activities are offered to encourage students'
interest, making them participants in their learning and, above all, fostering the development of
numerous abilities and social skills
Desarrollo y validación de un método para determinación de metales pesados en polen.
No full textLa identificación de metales pesados como contaminantes atmosféricos suscita gran interés desde mediados del siglo XX, siendo su bio-monitorización un medio muy eficaz para la detección de contaminación. Por ello, se ha desarrollado y validado un método para cuantificar 20 metales pesados en polen, mediante espectrometría de masas con plasma de acoplamiento inductivo (ICP-MS) tras digestión por microondas. Se han evaluado los parámetros de desempeño del método, encontrándose que los intervalos lineales de trabajo varían de 0,1 a 1000 μg L-1, con límites de detección y cuantificación en los rangos de 0,012 a 6,2 ng g-1 y 0,039 a 21 ng g-1 respectivamente. La dispersión observada en términos de repetibilidad fue inferior al 8,5%. El sesgo se evaluó con un material de referencia certificado, obteniéndose desviaciones menores de 9,6%. Asimismo, se realizó un estudio de la concentración de estos metales en polen de cinco especies vegetales (Pistacia lentiscus, Pistacia terebinthus, Phoenix canariensis, Pópulus alba y Pinus halepensis). Ello permitió hacer una aproximación a la eficiencia del polen como bioindicador de contaminación ambiental, hallándose diferencias significativas en el contenido de Ag, Al, Ba, Ni, Pb, Ti y Zn.Since the middle of the 20th century, the identification of heavy metals as atmospheric pollutants has been of great interest, being their bio-monitoring a very effective tool in pollution detection. Therefore, a new method has been developed and validated for the quantification of 20 heavy metals in pollen by inductively coupled plasma mass spectrometry (ICP-MS) after microwave digestion. Method performance characteristics have been assessed, finding out that linear working ranges vary from 0,1 to 1000 μg L-1, with limits of detection and quantification in ranges from 0,012 to 6,2 ng g-1 and 0,039 to 21 ng g-1 respectively. The observed dispersion was below 8,5% in terms of repeatability. Bias was evaluated with a certified reference material, achieving differences below 9,6%. Furthermore,
a study of the concentration of these metals in pollen of five vegetal species (Pistacia lentiscus, Pistacia terebinthus, Phoenix canariensis, Pópulus alba and Pinus halepensis) was carried out. This enabled an approximation about pollen efficiency as a bioindicator of air pollution, finding out significant differences in Ag, Al, Ba, Ni, Pb, Ti and Zn content
La construcción del lenguaje en Química: del átomo al sistema periódico
No full textUno de los principales objetivos más ambiciosos de las ciencias es lograr una descripción total del mundo que nos rodea y traducirlo al lenguaje cotidiano. Ante la inmensidad aparente de la Tabla Periódica, ésta constituye el pilar fundamental que ha favorecido la construcción de un lenguaje Químico universal. Es por ello que, el aprendizaje consciente de la misma y de todo lo que involucra es, en parte, la clave para superar con éxito la comprensión de la materia. Ante dicho reto, este Trabajo Fin de Máster presenta una propuesta para el desarrollo de la Unidad Didáctica “El átomo y Sistema Periódico” de la materia Física y
Química, destinada al alumnado de 4o de Educación Secundaria Obligatoria, desde una perspectiva alejada de lo tradicional. Para tal fin, en primer lugar, se ha realizado una revisión epistemológica sobre el origen y evolución de los átomos y elementos, hasta llegar a la actual Tabla Periódica. A continuación, se desarrolla una programación didáctica en la que se ofrecen una gran variedad de actividades cuyo objetivo es el fomento del interés del alumnado, haciéndolo partícipe de su propio aprendizaje y, sobre todo, potenciando el desarrollo de numerosas capacidades y habilidades sociales.One of the most ambitious goals of science is to achieve a complete description of the world that
surrounds us and to translate it into everyday language. Given the apparent immensity of the Periodic
Table, it constitutes the main basis that has encouraged the construction of a universal chemical language.
For this reason, conscious learning of the Periodic Table and all that it involves is, partially, the key to
successfully overcoming the understanding of the subject. Faced with this challenge, this Master's Thesis
presents a proposal for the development of the didactic unit "The atom and Periodic System" of the
subject Physics and Chemistry, aimed at students in the 4th grade of Compulsory Secondary Education,
from a non-traditional perspective. To this end, firstly, an epistemological review has been carried out
regarding the origin and evolution of atoms and elements, up to the current Periodic Table. Next, a
didactic program is developed in which a wide variety of activities are offered to encourage students'
interest, making them participants in their learning and, above all, fostering the development of
numerous abilities and social skills
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