1,720,960 research outputs found
Area MT, from sensation to perception
No full textEvolution has equipped the visual system of primates with sophisticated features that allow the concentration of neuronal processing resources on a small subset of the incoming information. Here we review evidence, concentrating on recordings from area MT in the extrastriate cortex of macaque monkeys trained to perform visual tasks, that these “bottom-up” filtering processes are tightly integrated with “top-down” attentional mechanisms that together they create an integrated saliency map. This topographic representation emphasizes behavioural relevance of the sensory input at the expense of an accurate and complete representation of the external world
Los derechos humanos y la fuerza terrestre
Full text linkEste texto se refiere a un tema a desarrollar que constituye una necesidad imperiosa en la actualidad, consideramos que la institución armada nace precisamente para proteger los derechos de los pueblos, brindando seguridad, inclusive comprometiendo sus intereses fundamentales, en el cumplimiento de misiones dispuestas por el poder político
Política cultural: Julio Cesar Trujillo
No full textThe text, a lecture by Dr. Julio César Trujillo, analyzes the period of transition Ecuador is experiencing, marked by the emergence of new times starting in the 1970s, driven by industrialization, urbanization, and oil exploitation. Trujillo argues that the country is at the threshold of a new era , where old values and ways of life are losing relevance, while new ones are not yet fully defined, generating deep social insecurity and confusion. It details how this transformation affects spheres such as the economy (gigantic projects), culture (mass media), politics (loss of the religious-based left/right division), and daily life (multifamily housing, new needs, and greater demand for job specialization). The author stresses that modern science and technology are advancing rapidly, have become a costly commodity, and require a specialization that the country lacks, exacerbating external dependence. In this context, Trujillo insists on the urgent need to design a cultural policy for Ecuador to rescue its own values, build a more just and humane society (addressing social marginalization) , and overcome the national characteristic of being a culturally fragmented and disintegrated people.El texto, una conferencia de Dr. Julio César Trujillo, analiza el período de transición que vive Ecuador, marcado por la emergencia de nuevos tiempos a partir de la década de 1970, impulsados por la industrialización, la urbanización y la explotación petrolera. Trujillo argumenta que el país se encuentra en los umbrales de una nueva época , donde los antiguos juicios de valor y modos de vida están perdiendo vigencia, mientras que los nuevos aún no están plenamente definidos, generando una profunda zozobra, inseguridad y confusión social. Se detalla cómo esta transformación afecta esferas como la economía (obras gigantescas), la cultura (medios de comunicación), la política (pérdida de la división izquierda/derecha por motivos religiosos), y la vida diaria (vivienda multifamiliar, nuevas necesidades, y mayor exigencia de especialización laboral). El autor subraya que la ciencia y la tecnología modernas avanzan rápidamente, se han convertido en una mercancía costosa y requieren una especialización de la que el país carece, exacerbando la dependencia externa. En este contexto, Trujillo insiste en la urgente necesidad de diseñar una política cultural para Ecuador que permita rescatar los valores propios, construir una sociedad más justa y humana (abordando la marginación social) , y superar la característica nacional de ser un pueblo culturalmente escindido y desintegrado
Política cultural: Julio Cesar Trujillo
No full textThe text, a lecture by Dr. Julio César Trujillo, analyzes the period of transition Ecuador is experiencing, marked by the emergence of new times starting in the 1970s, driven by industrialization, urbanization, and oil exploitation. Trujillo argues that the country is at the threshold of a new era , where old values and ways of life are losing relevance, while new ones are not yet fully defined, generating deep social insecurity and confusion. It details how this transformation affects spheres such as the economy (gigantic projects), culture (mass media), politics (loss of the religious-based left/right division), and daily life (multifamily housing, new needs, and greater demand for job specialization). The author stresses that modern science and technology are advancing rapidly, have become a costly commodity, and require a specialization that the country lacks, exacerbating external dependence. In this context, Trujillo insists on the urgent need to design a cultural policy for Ecuador to rescue its own values, build a more just and humane society (addressing social marginalization) , and overcome the national characteristic of being a culturally fragmented and disintegrated people.El texto, una conferencia de Dr. Julio César Trujillo, analiza el período de transición que vive Ecuador, marcado por la emergencia de nuevos tiempos a partir de la década de 1970, impulsados por la industrialización, la urbanización y la explotación petrolera. Trujillo argumenta que el país se encuentra en los umbrales de una nueva época , donde los antiguos juicios de valor y modos de vida están perdiendo vigencia, mientras que los nuevos aún no están plenamente definidos, generando una profunda zozobra, inseguridad y confusión social. Se detalla cómo esta transformación afecta esferas como la economía (obras gigantescas), la cultura (medios de comunicación), la política (pérdida de la división izquierda/derecha por motivos religiosos), y la vida diaria (vivienda multifamiliar, nuevas necesidades, y mayor exigencia de especialización laboral). El autor subraya que la ciencia y la tecnología modernas avanzan rápidamente, se han convertido en una mercancía costosa y requieren una especialización de la que el país carece, exacerbando la dependencia externa. En este contexto, Trujillo insiste en la urgente necesidad de diseñar una política cultural para Ecuador que permita rescatar los valores propios, construir una sociedad más justa y humana (abordando la marginación social) , y superar la característica nacional de ser un pueblo culturalmente escindido y desintegrado
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
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