1,721,005 research outputs found
Metáforas maquínicas
Full text linkTomado de Kunz Westerhoff, Dominique & Atallah, Marc (2011). El hombre-máquina y sus avatares. Entre ciencia, filosofía y literatura, siglos XVII-XXI. París: Vrin. Segunda Parte: Perspectivas contemporáneas. Ciencias robóticas y ciencias humanas (pp. 235-240).Traducción del francés al español por Luis Alfonso Palau Castaño, Medellín, 17 de marzo de 2017. Nota del editor.Primera metáfora: el hombre es una red de canalesFue en Grecia donde nació la medicina, y no es sorprendente que la primera metáfora utilizada para comprender el funcionamiento del cuerpo humano sea la de un sistema de irrigación. Los principios de base de la hidráulica, desarrollados desde los primeros momentos de la sedentarización, eran conocidos, por lo demás, por todas las grandes civilizaciones de la Antigüedad. Las disecciones de cadáveres de animales sacrificados muestran una red compleja de canales que conectan los órganos periféricos con los órganos centrales, el corazón y el cerebro especialmente, llenos de aire o de sangre, según los casos. En aquella época, la concepción dominante propone que las venas transportan la sangre hasta el corazón, pero que las arterias están llenas de aire, como las vías respiratorias (en efecto, en los cadáveres de animales observados las arterias están “vacías”, pues su sangre es expulsada inmediatamente después del sacrificio). El vocabulario anatómico conserva aún fósiles de esa confusión inicial: “la tráquea-arteria”. Para explicar esta circulación mixta de los médicos de la Antigüedad –como Empédocles– se recurre a la metáfora de la clepsidra, reloj de agua muy común en la época, cuyo flujo puede detenerse si se le cierra el orificio superior. Habrá que esperar al siglo XVII para que Harvey proponga la metáfora más precisa de la bomba para explicar la circulación sanguínea
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
How do we approach intrinsic motivation computationally? : a commentary on: What is intrinsic motivation? A typology of computational approaches. by Pierre-Yves Oudeyer and Frederic Kaplan
No full textWhat is the energy function guiding behavior and learningµ Representationbased approaches like maximum entropy, generative models, sparse coding, or slowness principles can account for unsupervised learning of biologically observed structure in sensory systems from raw sensory data. However, they do not relate to behavior. Behavior-based approaches like reinforcement learning explain animal behavior in well-described situations. However, they rely on high-level representations which they cannot extract from raw sensory data. Combinations of multiple goal functions seems the methodology of choice to understand the complexity of the brain. But what is the set of possible goals. ..
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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