1,721,629 research outputs found
Fractional factorial experiments in the development of manganese dioxide leaching by sucrose in sulphuric acid solutions
No full textDiseño De Un Sistema De Información Contable Para La Empresa Grupo Pineda López
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1. PLANTEAMIENTO DEL PROBLEMA
GRUPO PINEDA LÓPEZ es una empresa familiar cuya actividad económica es la capitalización de aportes mensuales y prestación de servicios de: préstamos a bajo interés, solidaridad, recreación y turismo a sus socios.
Desde su inicio la empresa Grupo Pineda López ha venido funcionando sin la respectiva legalización y no tiene sistema de información contable, solamente se llevan relaciones en libros manuales por cada socio: el manejo de los aportes, préstamos, comisiones ganadas por los socios en actividades, rifas, solidaridad, turismo y cuotas para reuniones sociales.PregradoContador Públic
NOVEL VOLTAGE CLAMP TO RECORD SMALL, FAST CURRENTS FROM ION CHANNELS EXPRESSED IN XENOPUS OOCYTES
No full textThe present report describes a novel technique for voltage-clamping amphibian oocytes in which part of the membrane is isolated by a vaseline gap and the cytoplasmic fluid is exchanged by cutting or permeabilizing the remaining membrane. The main features of this open-oocyte, vaseline-gap voltage clamp are: (a) low current noise (1 nA at 3 kHz), (b) control of the ionic composition of both the internal and external media, (c) fast time resolution (20–100 microseconds time constant of decay of the capacity transient) and (d) stable recordings for several hours. These features allow reliable measurements of tail or gating currents and the new method is especially suitable when either of these currents must be measured to test the effects of mutations introduced into the cDNAs of cloned ion channels
Diccionario contextual italiano-español de parónimos
No full textCon el Diccionario contextual italiano-español de parónimos, con más de 7.000 lemas, se amplía el concepto de falso amigo no solo en los niveles léxico-semántico y morfosintáctico, sino también en el fonético-fonológico, con particular atención a la diversidad de su uso y pronunciación entre italiano y español.
Cada lema se presenta tomando el italiano como lengua base en sus distintos aspectos contrastivos: marcas lingüísticas, transcripciones fonéticas en algunos casos, polisemia asimétrica y, muy especialmente, en función de su uso pragmático. Se señala también la presencia de extranjerismos, preferentemente anglicismos, que ponen de relieve su diversa aceptación en las dos lenguas, pero también de italianismos e hispanismos que han entrado respectivamente en español y en italiano con sentido figurado.
Cuando el lema italiano presenta más de un falso amigo se ha recurrido a la etimología para explicar la causa del contraste. De ahí que se hayan buscado los contextos más adecuados desde el punto de vista contrastivo, haciendo hincapié en cualquier caso en su distinta frecuencia en cada lengua. Se trata de ejemplos creados atal fin, de la lengua de uso, del lenguaje literario o bien de lenguajes especializados, con el objetivo de que el lector tenga en sus manos las diferencias más significativas entre estas dos lenguas –calificados erróneamente como afines– en diferentes registros.
Con este diccionario,por lo tanto, se intenta dar un paso más en la investigación lexicográfica italiano-española, incidiendo de forma especial en su aplicación al campo de la didáctica desde una perspectiva cognitiva y aportando nuevas soluciones en los estudios de traducción, en función de los complejos mecanismos mentales que definen a cada cultura
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
Léxico Español Actual IV
No full textCon la salida de este cuarto volumen de Léxico Español Actual continuamos el camino emprendido en 2007, que no es otro que el de difundir por Italia todas la novedades que se refieren a a los estudios lingüísticos españoles. Se sigue manteniendo, pues, la línea que escogimos desde el principio, es decir, la de no limitarnos a un área específica de la lengua, sino la de dar cabida a todos aquellos aspectos que fueran de interés en la actualidad, de ahí la variedad de temas que siempre han enriquecido estos volúmenes, entre los que sobresalen, por citar solo algunos, el léxico, la morfosintaxis, la cognición, la contrastividad, la traducción..
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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