1,724,533 research outputs found
Linked collectors and determiners for: Colección de Mamíferos del Museo de Historia Natural de la Universidad de la Amazonia (UAM-M).
No full textNatural history specimen data linked to collectors and determiners held within, "Colección de Mamíferos del Museo de Historia Natural de la Universidad de la Amazonia (UAM-M)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7">https://bionomia.net/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7">https://gbif.org/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Colección de Mamíferos del Museo de Historia Natural de la Universidad de la Amazonia (UAM-M).
No full textNatural history specimen data linked to collectors and determiners held within, "Colección de Mamíferos del Museo de Historia Natural de la Universidad de la Amazonia (UAM-M)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7">https://bionomia.net/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7">https://gbif.org/dataset/8ffeca3a-6ef4-43fb-8319-d82fe17dccc7</a>. Formatted as a Frictionless Data package
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Caracterización y comparación de adhesivos a base del vinil acetato PVA-3025 y EA-8319 de la planta Akzonobel Ecuador
No full textEstudio comparativo de las propiedades fisicoquímicas, mecánicas y comportamiento reológico de dos adhesivos a base de vinil acetato, el PVA-3025 que corresponde a un nuevo adhesivo desarrollado por la empresa AkzoNobel y el comercial EA-8319.
Mediante ensayos normalizados se efectuó la caracterización, de los adhesivos y empleando el reómetro PHYSICAL MCR 301 y su software, se determinó el comportamiento reológico. Las variables consideradas en el estudio fueron: tiempo de vida después de la producción: 15 días, 3 y 6 meses, tiempo de medición de sus características, que fueron 4 en 34 días y temperaturas de estabilidad y medición: 25, 35 y 45 °C. Los resultados de las propiedades fisicoquímicas se representaron gráficamente y el comportamiento reológico mediante curvas de viscosidad en función a la gradiente de velocidad determinando que obedecen al tipo de fluido no newtoniano, pseudoplástico de Herschel-Bulkley y de modelos de logaritmos polinómicos.
Se concluye que la estabilidad del adhesivo PVA-3025 es mejor, que la del adhesivo EA-8319, ya que experimenta menores variaciones en sus propiedades tanto fisicoquímicas, mecánicas y reológicas; principalmente en su viscosidad la cual varia en el adhesivo PVA-3025 en un 8,78% y en el adhesivo EA-8319 en un 501%.Comparative study of physical-chemical, mechanical and rheological behavior properties presented in two vinyl acetate based adhesives, PVA-3025 which corresponds to a new adhesive developed by the company AkzoNobel and common commercial adhesive EA-8319.
The characterization was carried out through the use of standardized trial son the adhesives and using a PHYSICAL MCR 301 rheometer along with its corresponding software, rheological behavior was determined. The variables considered for the study were: lifetime after production: 15 days, 3 and 6 months, characteristic measuring time, which were 4 in 34 days along with stability temperatures measured at: 25, 35 and 45 °C. The results of physical-chemical properties were graphically represented and rheological behavior was presented in viscosity curves regarding the speed gradient determining that they comply with that of a non-Newtonian fluid, Herschel-Bulkley’s pseudo-plastic and polynomial logarithm models.
It is concluded that adhesive PVA-3025 is better than EA-8319 adhesive, since it presents smaller variations of its physical-chemical, mechanical and rheological properties; mainly in its viscosity which in adhesive PVA-3025 is of 8,78% and in adhesive EA-8319 is of 501%
Variations on the Author
No full text“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
No full textWe 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
No full textWe 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
ETXEBERRIA, Xabier. La educación para la paz reconfigurada. La perspectiva de las víctimas, Ed. Catarata, Madrid, 2013, pp. 325. ISBN 978-84-8319-846-9
No full textETXEBERRIA, Xabier. La educación para la paz reconfigurada. La perspectiva de las víctimas, Ed. Catarata, Madrid, 2013, pp. 325. ISBN 978-84-8319-846-9</jats:p
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