1,721,262 research outputs found
Origen y evolución de los humanos: La historia de la divergencia de los primates
No full textLos seres humanos (Homo sapiens) somos la única especie viva del género Homo. Integramos el grupo de los homínidos con los orangutanes, los chimpancés y los gorilas, grupo del que también formaron parte otras especies extinguidas. Las relaciones entre todas ellas merecen ser revisadas a la luz de la información genética actualmente disponible.Fil: Perez, Sergio Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin
Origen y evolución de los humanos: La historia de la divergencia de los primates
No full textLos seres humanos (Homo sapiens) somos la única especie viva del género Homo. Integramos el grupo de los homínidos con los orangutanes, los chimpancés y los gorilas, grupo del que también formaron parte otras especies extinguidas. Las relaciones entre todas ellas merecen ser revisadas a la luz de la información genética actualmente disponible.Fil: Perez, Sergio Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin
Identificación del formato de PDU de comunicaciones desconocidas con ingeniería inversa
No full textTesis (Maestría en Ciencias en Ingeniería de Cómputo), Instituto Politécnico Nacional, Centro de Investigación en Computación, 2017, 1 archivo PDF, (72 páginas). tesis.ipn.m
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
Guanaco Distribution in Northwest Patagonia
No full textHere are guanaco occurrences that we collected from archaeological, ethnohistorical and current sighting data from Northwest Patagonia (Argentina), separated in periods (Lata Holocene, Historic and Current). Likewise, we also provide different bioclimatic and anthropic variables that could contribute to explain guanaco distribution in Northwest Patagonia, as well as the R script to model guanaco distribution in each period and estimate the explicatory power of each variable. We found significant changes in guanaco distribution throughout time. Specifically, in the Current period (last 30 years of sightings) guanaco distribution shifted to the East, and the main explanatory variables are Human footprint and herders summer camps.Fil: Moscardi, Bruno Federico. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Perez, Sergio Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
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
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
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