6,765 research outputs found

    Automated construction and analysis of political networks via open government and media sources

    Get PDF
    We present a tool to generate real world political networks from user provided lists of politicians and news sites. Additional output includes visualizations, interactive tools and maps that allow a user to better understand the politicians and their surrounding environments as portrayed by the media. As a case study, we construct a comprehensive list of current Texas politicians, select news sites that convey a spectrum of political viewpoints covering Texas politics, and examine the results. We propose a ”Combined” co-occurrence distance metric to better reflect the relationship between two entities. A topic modeling technique is also proposed as a novel, automated way of labeling communities that exist within a politician’s ”extended” network.Peer ReviewedPostprint (author's final draft

    Modulación de la adhesividad de células de astrocitoma humano a distintas proteínas de matriz extracelular

    Get PDF
    La matriz extracelular (MEC) es una asociación compleja de distintos tipos de macromoléculas, cada una de ellas con una función especializada: proteínas estructurales (colágeno y elastina), glicosaminoglucanos, proteoglicanos (como sindecanos), glicoproteínas (fibronectina, laminina y tenascina, mediadoras de la adhesión celular), proteasas (como MMPs y ADAMs) y proteínas matricelulares (como lisil oxidasa) (10). La MEC proporciona una estructura estable alrededor de las células y actúa como soporte para su crecimiento. Además influye en los procesos de adhesión, en la motilidad, en la proliferación celular, y en la regulación de funciones metabólicas, entre otros. Actúa como reservorio de moléculas con actividad biológica: (i) algunos factores de crecimiento y citoquinas están unidos a los proteoglicanos de la matriz y de la superficie celular; y (ii) algunas proteasas y sus inhibidores se asocian con componentes de la matriz (11). La MEC cerebral no es un sistema de sostenimiento estático y los astrocitos son capaces de modular la expresión de sus receptores de adhesión en función del ambiente.Máster en Investigación Biomédic

    The optimal transport problem and its applications

    Full text link
    Treballs finals del Màster en Matemàtica Avançada, Facultat de Matemàtiques, Universitat de Barcelona: Curs: 2022-2023. Director: Joaquim Ortega Cerdà[en] The objective of this project is to present the base of Optimal Transport Theory and some of its applications. The Optimal Transport Problem was first studied by Monge in the 18th century, and later reformulated by Kantorovich during the 20th century, being this second version the main object of study. One of the key results relating Monge’s formulation is Brenier’s theorem, which we will prove and apply to prove the Isoperimetric inequality and the Sobolev inequality. By employing a different method we will prove another classical result, the Brunn-Minkowski inequality. This essay concludes with some conditions for the two problems to have the same optimal value. The other main topic studied during this work are the Wasserstein spaces. They are a family of probability measures spaces where we use Optimal transport to construct a metric, the Wasserstein distance. A key result is that it metrizes the weak topology of these spaces

    “old tales to keep the void from pouring in”: Screen Memories in Samuel Beckett’s Works

    Get PDF
    According to Freud, ‘screen memories’ are those memories from childhood that have been distorted and hide a trauma that the ‘ego’ has not been capable of accepting yet. This B. A. Thesis aims to analyze how the Irish author Samuel Beckett uses screen memories as a literary device in different ways in his narrative works From an Abandoned Work and Company and in his plays Krapp’s Last Tape and That Time. In addition, this dissertation shows that the content from those screen memories was often based on Beckett’s own life experiences regarding the relationship with his parents and their deaths, his unappreciated sensitivity and his fear of parenthood.Sigmund Freud acuñó el término ‘recuerdos encubridores’ para referirse a aquellos recuerdos de la infancia que han sido distorsionados y ocultan un trauma que el ‘ego’ no ha sido capaz de aceptar. Este TFG analiza cómo el autor irlandés Samuel Beckett utiliza los recuerdos encubridores como recurso literario en sus obras en prosa From an Abandoned Work y Company y en sus piezas teatrales Krapp’s Last Tape y That Time. Además, también pretende mostrar que el contenido de esos recuerdos encubridores está a menudo inspirado en las vivencias personales del autor en cuanto a la relación con sus padres y sus respectivos fallecimientos, su ignorada sensibilidad y su miedo a la paternidad.Departamento de Filología InglesaGrado en Estudios Inglese

    Weighted inequalities for the Hardy operator

    Get PDF
    Treballs finals del Màster en Matemàtica Avançada, Facultat de matemàtiques, Universitat de Barcelona, Any: 2017, Director: F. Javier Soria de DiegoThis project revolves around Hardy’s integral inequality, proved by G. H. Hardy in 1925. This inequality has been studied by a large number of authors during the twentieth century and has motivated some important lines of study which are currently active. We study the classical Hardy’s integral inequality and its generalizations. We analyse some of the first results including weighted inequalities and prove the key theorem of B. Muckenhoupt, who characterized Hardy’s integral inequality with weights for the diagonal case in 1972. After this fundamental result, different authors considered the general context and new characterizations appeared until closing definitely the problem in 2000. Also we study Hardy’s integral inequality in the cone of monotone functions. This point of view is really interesting and has a lot of surprising consequences. For example, M. A. Ariño and B. Muckenhoupt realized in 1990 that Hardy’s inequality in the cone of monotone functions is equivalent to the boundedness of the Hardy-Littlewood maximal operator between Lorentz spaces. Just after E. Sawyer proved that the classical Lorentz space Λp(w)\Lambda ^{p}(w) is normable if, and only if, Hardy’s integral inequality in the cone of monotone functions is satisfied for ww. We study also the normability of both spaces Λp(w)\Lambda^{p} (w) and Λp,(w)\Lambda^{p,\infty} (w) in terms of the boundedness of the maximal operator
    corecore