982 resultados para Erronkari ibarra


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Fil: Karczmarczyk, Pedro. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Fil: Karczmarczyk, Pedro. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Fil: Karczmarczyk, Pedro. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Introducción Los investigadores del Centro de Investigaciones Históricas de la Universidad  de Costa Rica ya han publicado cuatro títulos de  la Colección de Historia, entre los cuales se cuenta esta obra de Eugenia Ibarra. El trabajo dentro del grupo del Centro, que tiene diversas especialidades, ha contribuido a que “Las sociedades cacicales,” aunque es  un libro dedicado a ese tema en un siglo especifico, se pueda leer con la sensación de que ese trozo de la historia no esta aislado sino que es parte integra de la totalidad que es todo el acontecer de  la vida humana en el país desde sus inicios hasta el presente.

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The max-coloring problem is to compute a legal coloring of the vertices of a graph G = (V, E) with a non-negative weight function w on V such that Sigma(k)(i=1) max(v epsilon Ci) w(v(i)) is minimized, where C-1, ... , C-k are the various color classes. Max-coloring general graphs is as hard as the classical vertex coloring problem, a special case where vertices have unit weight. In fact, in some cases it can even be harder: for example, no polynomial time algorithm is known for max-coloring trees. In this paper we consider the problem of max-coloring paths and its generalization, max-coloring abroad class of trees and show it can be solved in time O(vertical bar V vertical bar+time for sorting the vertex weights). When vertex weights belong to R, we show a matching lower bound of Omega(vertical bar V vertical bar log vertical bar V vertical bar) in the algebraic computation tree model.

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We consider the problem of matching people to jobs, where each person ranks a subset of jobs in an order of preference, possibly involving ties. There are several notions of optimality about how to best match each person to a job; in particular, popularity is a natural and appealing notion of optimality. However, popular matchings do not always provide an answer to the problem of determining an optimal matching since there are simple instances that do not adroit popular matchings. This motivates the following extension of the popular rnatchings problem:Given a graph G; = (A boolean OR J, E) where A is the set of people and J is the set of jobs, and a list < c(1), c(vertical bar J vertical bar)) denoting upper bounds on the capacities of each job, does there exist (x(1), ... , x(vertical bar J vertical bar)) such that setting the capacity of i-th, job to x(i) where 1 <= x(i) <= c(i), for each i, enables the resulting graph to admit a popular matching. In this paper we show that the above problem is NP-hard. We show that the problem is NP-hard even when each c is 1 or 2.

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We report an anomalous magnetostriction behavior of the charge ordered compound Nd0.5Sr0.5MnO3. We have found that the applied magnetic field not only gives rise to a large negative magnetoresistance but also produces a huge positive magnetovolume effect. This unusual effect is explained considering that the applied magnetic field induces a structural transition at which the volume drastically increases. This effect is also seen in the anisotropic magnetostriction which shows clear anomalies at the field induced transition.

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Intelectuales y poder: la influencia de Carlos Nino en la presidencia de Alfonsín / Cristina Basombrío -- Notas sobre la influencia de las ideas políticas españolas en la Argentina. Siglo XIX / Miguel Ángel De Marco -- El significado de La rosa blindada en el ámbito intelectual argentino de la década de 1960 / María Victoria Carsen -- Una alternativa diferente. El teatro libertario (1910-1930) / María Fernanda De La Rosa -- El límite, la marca y la huella. Reflexiones acerca de la construcción de identidades socioculturales en América Latina / Valeria M. Elizalde -- Crisis política y realineamientos partidarios en los años en los años treinta. Partidos políticos en Catamarca (1928-1932) / Carlos Humberto Ibáñez, Luis Alejandro Alvero -- El doctor Dick Edgar Ibarra Grasso y el hallazgo y desciframiento de la escritura indígena andina / Julio M. Luqui Lagleyze -- El ocaso de la UCR Antipersonalista y el aporte del radicalismo a la construcción del peronismo (1943-1946) / Elena T. Piñeiro -- Leyes de Reforma de Regulares, extinción de los agustinos cuyanos y algunos modelos de secularización / Emiliano Sánchez Pérez, Osa -- Reseñas Bibliográficas

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245 p. : il.

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Duración (en horas): Más de 50 horas. Destinatario: Estudiante y Docente

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Diseñar un sistema para seguimiento y gestión de enfoque para video/fotografía, que utilice sensores inalámbricos para medir distancias.

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Analisis de viabilidad de la combinación de las funcionalidades de dos módulos/dispositivos GW (Gateway).Dichos módulos realizan el intercambio de datos entre los diferentes buses embarcados en un tren.

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In this paper, reanalysis fields from the ECMWF have been statistically downscaled to predict from large-scale atmospheric fields, surface moisture flux and daily precipitation at two observatories (Zaragoza and Tortosa, Ebro Valley, Spain) during the 1961-2001 period. Three types of downscaling models have been built: (i) analogues, (ii) analogues followed by random forests and (iii) analogues followed by multiple linear regression. The inputs consist of data (predictor fields) taken from the ERA-40 reanalysis. The predicted fields are precipitation and surface moisture flux as measured at the two observatories. With the aim to reduce the dimensionality of the problem, the ERA-40 fields have been decomposed using empirical orthogonal functions. Available daily data has been divided into two parts: a training period used to find a group of about 300 analogues to build the downscaling model (1961-1996) and a test period (19972001), where models' performance has been assessed using independent data. In the case of surface moisture flux, the models based on analogues followed by random forests do not clearly outperform those built on analogues plus multiple linear regression, while simple averages calculated from the nearest analogues found in the training period, yielded only slightly worse results. In the case of precipitation, the three types of model performed equally. These results suggest that most of the models' downscaling capabilities can be attributed to the analogues-calculation stage.