1,721,069 research outputs found
Movilidades e inmovilidades en contextos migratorios: ruralidades, control fronterizo y dinámicas sociales
Full text linkDesde la perspectiva de varias de las ciencias sociales, esta compilación da cuenta de procesos migratorios con distintas caras: laboral, educativa y migración forzada, con movimientos circulatorios, de retorno y tránsito. Los estudios se ubican en el contexto de una ruralidad en permanente reconfiguración, donde la movilidad abarca dimensiones tanto culturales (educación, identidad, emancipación) como laborales (trabajo precario, flexible o no-libre) y temporales (ritmos del calendario de producción, de la familia, del modelo económico neoliberal). Cubre, asimismo, las experiencias de personas con migración internacional que se encuentran varadas en la frontera norte de México, las que se viven desde el género, en el caso de las mujeres migrantes y desplazadas, y el espacio, en el caso de los campamentos fronterizos. Da cuenta también de distintas dinámicas sociales frente a la otredad migrante (aislamiento social, discriminación racial, convivencialidad), desde los expat japoneses hasta las mujeres indígenas mexicanas, pasando por los jóvenes estudiantes en Estados Unidos y los vecinos de los barrios multiculturales de España, con la intención de entender la diversidad de configuraciones sociales, políticas y territoriales que caracterizan las dinámicas de las (in)movilidades contemporáneas
El papel de la espera en las trayectorias de movilidad y proyectos migratorios : un estudio de caso del Albergue Hermanos en el Camino en Metepec, Estado de México
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Políticas de control fronterizo y sanitario durante la pandemia : México en el régimen global de fronteras
No full textGoing 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
Role of the mitochondrial dynamics in acute myocardial infarction
No full textL’infarctus du myocarde (IDM) est une pathologie décrite comme étant "la mort des cellules myocardiques après une ischémie prolongée". Actuellement, la reperfusion est la stratégie la plus efficace pour limiter l’étendue de cette nécrose myocardique et améliorer le pronostic des patients. Cependant, cette reperfusion entraine des lésions secondaires irréversibles que l’on appelle lésions de reperfusion. Pour protéger le coeur de ces lésions de reperfusion, des stratégies sont à l’étude avec notamment la cardioprotection par le conditionnement ischémique à distance. Ce conditionnement consiste à réaliser de courts épisodes d'ischémie-reperfusion (IR) non délétères au niveau d’un organe distant du coeur. La mitochondrie est un acteur central dans la genèse des lésions de reperfusion mais aussi dans les mécanismes de cardioprotection. Plusieurs études suggèrent que la modulation de la dynamique mitochondriale, regroupant les mécanismes de fission-fusion mitochondriale, pourrait être une nouvelles tratégie thérapeutique pour diminuer les lésions de reperfusion. Dans ce travail nous avons étudié deux modèles de souris transgéniques déficientes soit en protéine de fusion Optic Atrophy 1 (OPA1), soit en protéine de fission Dynamin Related Protein 1 (DRP1). Nous avons montré qu’un déficit partiel en OPA1 était associé à une augmentation des lésions d’IR et à un déséquilibre dans les flux calciques mitochondriaux alors qu’un déficit partiel en DRP1 réduisait les lésions d’IR. Ces données suggèrent qu’une stratégie thérapeutique ciblant la dynamique mitochondriale en faveur d’une fusion pourrait diminuer les lésions d’IR.Myocardial infarction (MI) is defined in pathology as « myocardial cell death due to prolonge dischemia ». Currently, reperfusion is the most effective strategy to limit the extent of this myocardial necrosis and to improve the prognosis of patients. Paradoxically, this reperfusion is the cause of additional irreversible damage, called reperfusion injuries. A strategy that was proven efficient in reducing these injuries is the remote ischemic conditioning (RIC). This strategy consists of applying brief, non invasive, episodes of ischemia reperfusion (IR) to an organ or a tissue distant from the ischemic organ, here the heart. Mitochondria play amajor role in both reperfusion injuries and cardioprotection mechanisms. Several studies suggest that the modulation of mitochondrial dynamics, which is mitochondrial fission and fusion mechanisms, could be a new therapeutic strategy for reducing reperfusion injuries. In this work, we studied two transgenic mouse models, one model is deficient in Optic Atrophy 1(OPA1) fusion protein and the other one is deficient in Dynamin Related Protein 1 (DRP1) fission protein. We showed that a partial OPA1 deficiency was associated with an increase in IR injuries and an imbalance in mitochondrial calcium flux, whereas, a partial DRP1 deficiency decreased IR injuries. These data suggest that a therapeutic strategy modulating the mitochondrial dynamics in favor of fusion could reduce IR injuries
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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