142 research outputs found

    Discussing a new Divisive Hierarchical Clustering algorithm

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    We present DHClus, a new Divisive Hierarchical Clustering algorithm developed to detect clusters with arbitrary shapes. Our algorithm is able to solve clustering problems defined by different scales, i.e. clusters with arbitrarily dissimilar densities, connectivity or between cluster distances. The algorithm not only works under this difficult connditions but it is also able to find the number of clusters automatically. This paper describes this new algorithm and then present results on real gene expression data. We compare the results of DHClus with other algorithms to provide a reference frame.Sociedad Argentina de Informática e Investigación Operativa (SADIO

    Discussing a new Divisive Hierarchical Clustering algorithm

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    We present DHClus, a new Divisive Hierarchical Clustering algorithm developed to detect clusters with arbitrary shapes. Our algorithm is able to solve clustering problems defined by different scales, i.e. clusters with arbitrarily dissimilar densities, connectivity or between cluster distances. The algorithm not only works under this difficult connditions but it is also able to find the number of clusters automatically. This paper describes this new algorithm and then present results on real gene expression data. We compare the results of DHClus with other algorithms to provide a reference frame.Sociedad Argentina de Informática e Investigación Operativa (SADIO

    Resistencia y modo de fractura de primeros premolares superiores tratados endodónticamente con remanente coronario de tres paredes utilizando distintas alternativas de restauración

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    El objetivo de este trabajo fue determinar el comportamiento de distintos métodos de restauración post endodoncia en primeros premolares superiores con remanente coronario de tres paredes, basado en la resistencia y modo de fractura en dientes jóvenes y adultos

    Evolución y tendencias de la investigación científica en circuitos cortos de comercialización: análisis bibliométrico internacional.

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    Short Food Supply Chains (SFSCs) are forms of agrifood product circulation that have the aim of bringing together producers and consumers, promoting fair trade, and giving access to local foods. The study of SFSCs is a developing area of knowledge. The objective of the research was to perform a bibliometric analysis of the evolution and the current state of international scientific research on SFSCs and to identify trends and opportunities for research, specifically in Latin America. For this purpose, we carried a bibliometric analysis out, through the databases Dimensions and Redalyc, during the period of 2000 to 2021 and processed in the VOSviewer software. Results show a total of 253 documents and it was determined that Europe represents 67% of the research on SFSCs; however, a growing production of studies can be seen in North America and Latin America, primarily in case studies, which represent 25%. The areas of knowledge where there are more studies are the social sciences, administration and economy. The conclusion is that COVID-19, food security and agrifood policies are areas of opportunity for research linked to Short Food Supply Chains in Latin America.Los Circuitos Cortos de Comercialización (CCC) son formas de circulación de productos agroalimentarios que tienen como finalidad el acercamiento de productores y consumidores, la promoción del comercio justo y el acceso a alimentos locales. El estudio de los CCC es un área del conocimiento en desarrollo. El objetivo de la investigación es realizar un análisis bibliométrico sobre la evolución y el estado actual de la investigación científica internacional de los CCC e identificar las tendencias y oportunidades de investigación específicamente en Latinoamérica. Para ello, se realizó un análisis bibliométrico, mediante las bases de datos Dimensions y Redalyc, durante el periodo 2000 al 2021 y se procesaron en el software VOSwiever. Los resultados arrojan un total de 253 documentos y se determina que Europa representa el 67% de la investigación sobre CCC; no obstante, en América del Norte y América Latina se observa una creciente producción de investigaciones, principalmente en estudios de caso, las cuales representan el 25%. Las áreas del conocimiento donde hay mayores estudios son las ciencias sociales, la administración y la economía. Se concluye que Covid-19, seguridad alimentaria y políticas agroalimentarias son áreas de oportunidad para la investigación vinculada a los Circuitos Cortos de Comercialización en Latinoamérica

    Modelaje matem√°tico de la interferencia producida por redes VSAT/MF-TDMA

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    En este trabajo se desarrolla un modelo matem√°tico para describir el comportamiento estad√≠stico de la interferencia producida por las redes VSAT/MF-TDMA. El modelo propuesto se utiliza para evaluar la interferencia producida por las ofertas ascendentes de los enlaces VSAT/MF-TDMA en los enlaces de otra red que utiliza un sat√©lite vecino. En el modelo propuesto, se desarrollaron expresiones anal√≠ticas para tener en cuenta los efectos de las variaciones en las potencias transmitidas, los tama√Īos de antena y los errores de punter√≠a de las antenas de transmisi√≥n. Las posiciones geogr√°ficas de las estaciones terrenas est√°n modeladas por procesos puntuales de Poisson, bidimensionales. El modelo propuesto es suficientemente general para acomodar otros tipos de procesos puntuales, adem√°s de situaciones que involucran √°reas de servicio que contienen m√ļltiples tipos de distribuci√≥n geogr√°fica de estaciones terrenas. Los resultados num√©ricos obtenidos con el modelo propuesto se comparan con los basados ‚Äč‚Äčen valores reales de par√°metros (por ejemplo, ubicaci√≥n de estaciones terrenas, tama√Īos de antena y potencias de transmisi√≥n) proporcionados por un operador satelital brasile√Īo.Neste trabalho √© desenvolvido um modelo matem√°tico para descrever o comportamento estat√≠stico da interfer√™ncia produzida por redes VSAT/MFTDMA. O modelo proposto √© utilizado para avaliar a interfer√™ncia produzida pelos lances de subida de enlaces VSAT/MF-TDMA em enlaces de uma outra rede que utiliza um sat√©lite vizinho. No modelo proposto, express√Ķes anal√≠ticas foram desenvolvidas para levar em conta os efeitos de varia√ß√Ķes nas pot√™ncias transmitidas, nos tamanhos das antenas e nos erros de apontamento das antenas transmissoras. As posi√ß√Ķes geogr√°ficas das esta√ß√Ķes terrenas s√£o modeladas por processos pontuais de Poisson, bi-dimensionais. O modelo proposto √© suficientemente geral para acomodar outros tipos de processos pontuais, al√©m de situa√ß√Ķes envolvendo √°reas de servi√ßo contendo m√ļltiplos tipos de distribui√ß√£o geogr√°fica das esta√ß√Ķes terrenas. Resultados num√©ricos obtidos com o modelo proposto s√£o comparados √†queles baseados em valores reais de par√Ęmetros (e.g. localiza√ß√£o das esta√ß√Ķes terrenas, tamanhos de antenas e pot√™ncias de transmiss√£o) que foram fornecidos por um operador brasileiro de sat√©lites.Brasil. Conselho Nacional de Desenvolvimento Cient√≠fico e Tecnol√≥gico (CNPq)Tesi

    Discussing a new Divisive Hierarchical Clustering algorithm

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    We present DHClus, a new Divisive Hierarchical Clustering algorithm developed to detect clusters with arbitrary shapes. Our algorithm is able to solve clustering problems defined by different scales, i.e. clusters with arbitrarily dissimilar densities, connectivity or between cluster distances. The algorithm not only works under this difficult connditions but it is also able to find the number of clusters automatically. This paper describes this new algorithm and then present results on real gene expression data. We compare the results of DHClus with other algorithms to provide a reference frame.Sociedad Argentina de Informática e Investigación Operativa (SADIO

    Application of Model-driven engineering to multi-agent systems: a language to model behaviors of reactive agents

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    Many users of multi-agent systems (MAS) are very commonly disinclined to model and simulate using current MAS platforms. More specifically, modeling the dynamics of a system (in particular the agents' behaviors) is very often a challenge to MAS users. This issue is more often observed in the domain of socio-ecological systems (SES), because SES domain experts are rarely programmers. Indeed, the majority of MAS platforms were not conceived taking into consideration domain-experts who are non-programmers. Most current MAS tools are not dedicated to SES, or nor do they possess an easily understandable formalism to represent the behaviors of agents. Moreover, because it is platform-dependent, a model realized in a given MAS platform cannot be properly used on another platform due to incompatibility between MAS platforms. To overcome these limitations, we propose a domain-specific language (DSL) to describe the behaviors of reactive agents, regardless of the MAS platform used for simulation. To achieve this result, we used model-driven engineering (MDE), an approach that provides tools to develop DSLs from a meta-model (abstract syntax), textual editors with syntax highlighting (for the concrete syntax) and code generation capabilities (for source-code generation of a model). As a result, we implemented a language and a textual editor that allow SES domain experts to describe behaviors in three different ways that are close to their natural expression: as equations when they are familiar with these, as a sequence of activities close to natural language or as an activity diagram to represent decisions and a sequence of behaviors using a graphic formalism. To demonstrate interoperability, we also developed code generators targeting two different MAS platforms (Cormas and Netlogo). We tested the code generators by implementing two SES models with the developed DSL. The generated code was targeted to both MAS platforms (Cormas and Netlogo), and successfully simulated in one of them. We conclude that the MDE approach provides adequate tools to develop DSL and code generators to facilitate MAS modeling and simulation by non-programmers. Concerning the DSL developed, although the behavioral aspect of MAS simulation is part of the complexity of modeling in MAS, there are still other essential aspects of model and simulation of MAS that are yet to be explored, such as model initialization and points of view on the model simulated worl

    Reflexiones y conceptualizaciones sobre la maternidad y su ejercicio

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    Se parte de nuevos hallazgos de la investigaci√≥n en curso: ‚ÄúModalidades de la diversidad en el ejercicio de la parentalidad y la pareja‚ÄĚ. Se retoman y analizan: diferentes significaciones sociales sobre la maternidad, condicionantes hist√≥ricos que constituyeron su condici√≥n de posibilidad, reflexionando sobre los fundamentos de esos enunciados que a√ļn persisten de estas concepciones en el imaginario social actual (concepci√≥n de una maternidad obligada como imperativo social de perpetuaci√≥n de la especie; la soldadura mujer-madre); c√≥mo se expresa lo instituido y lo instituyente en los discursos de las madres entrevistadas (grados de libertad en las elecciones).Eje: Psicolog√≠a del Desarrollo Mesa: Nuevos avances de investigaci√≥n sobre organizaciones familiares y diversidadPublicado en: Memorias del IV Congreso Internacional de Investigaci√≥n de la Facultad de Psicolog√≠a: conocimiento y pr√°ctica profesional : perspectivas y problem√°ticas actuales - Tomo IFacultad de Psicolog√≠

    Violência sacrificial em Planeta Hulk

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    In spite of their increasing popularity, comic books have not yet been sufficiently explored when it comes to academic studies about the violence they contain. Comics derive from pulp fiction, a kind of literature in which the protagonists usually do whatever it takes to reach their goals. The course of development of the genre comprises several phases, from the establishment of a regulatory body of censorship to the creation of different superheroes that follow different moral codes. One of them, Hulk ‚Äď inspired in The Strange Case of Dr. Jekyll and Mr. Hyde (Lee, 1974, p. 75) ‚Äď, is a wild giant that breaks out whenever his alter ego, scientist Bruce Banner, grows angry. Hulk has been accepted as a hero ever since his creation, although he is not able to control his own actions, and often gets involved in fights against other heroes. The aim of this work is to analyze Planet Hulk, a story in which Hulk is exiled from Earth, in order to check its relation to Ren√© Girard‚Äôs ideas about sacrificial violence, and also to understand the ways in which violence is presented to the reader. Under the premise that comics can be taken as a representation of the society from which they derive, we hope to come to conclusions about the relation involving this kind of artistic expression and the reading public that consumes it so as to deal with, absorb, and repress the violence there contained.Keywords: Comics, Marvel Comics, Planet Hulk, Sacrificial violence, Ren√© Girard.Embora cada vez mais populares, as hist√≥rias em quadrinhos ainda s√£o pouco estudadas, em especial quando se trata da viol√™ncia nelas contida. Inicialmente violentas (at√© por conta da influ√™ncia da pulp fiction que serviu como uma de suas grandes inspira√ß√Ķes), muitos dos seus her√≥is faziam o que fosse preciso para alcan√ßar seus objetivos. De l√° para c√°, muito aconteceu: desde o estabelecimento de um √≥rg√£o regulador do que era publicado at√© a cria√ß√£o de diversos super-her√≥is, com diferentes c√≥digos de moral. Um deles, inspirado em O M√©dico e o Monstro (Lee, 1974, p. 75), √© o Hulk, um gigante selvagem que eclode sempre que seu alter ego, o cientista Bruce Banner, se enraivece. Desde sua cria√ß√£o, o Hulk atuou como her√≥i, ainda que nem sempre ele tivesse controle de suas a√ß√Ķes. Muitas vezes, acaba se envolvendo em conflitos contra outros her√≥is, de modo que, em uma de suas hist√≥rias, foi exilado da Terra. Essa √© a trama da miniss√©rie Planeta Hulk. Apropriando-se da teoria de Ren√© Girard, sobre a viol√™ncia e o sagrado, busca-se checar como ela se encaixa na saga da Marvel Planeta Hulk, e tamb√©m de que forma a viol√™ncia √© mostrada ao leitor. Entendendo as hist√≥rias em quadrinhos como uma representa√ß√£o da sociedade em que est√£o inseridas, esperase verificar como essa quest√£o se configura em uma express√£o art√≠stica amplamente consumida por um p√ļblico que, ao mesmo tempo em que a consome, reprime a viol√™ncia.Palavras-chave: Hist√≥rias em Quadrinhos, Marvel Comics, Planeta Hulk, viol√™ncia sacrificial, Ren√© Girard

    Reflexiones y conceptualizaciones sobre la maternidad y su ejercicio

    Get PDF
    Se parte de nuevos hallazgos de la investigaci√≥n en curso: ‚ÄúModalidades de la diversidad en el ejercicio de la parentalidad y la pareja‚ÄĚ. Se retoman y analizan: diferentes significaciones sociales sobre la maternidad, condicionantes hist√≥ricos que constituyeron su condici√≥n de posibilidad, reflexionando sobre los fundamentos de esos enunciados que a√ļn persisten de estas concepciones en el imaginario social actual (concepci√≥n de una maternidad obligada como imperativo social de perpetuaci√≥n de la especie; la soldadura mujer-madre); c√≥mo se expresa lo instituido y lo instituyente en los discursos de las madres entrevistadas (grados de libertad en las elecciones).Eje: Psicolog√≠a del Desarrollo Mesa: Nuevos avances de investigaci√≥n sobre organizaciones familiares y diversidadPublicado en: Memorias del IV Congreso Internacional de Investigaci√≥n de la Facultad de Psicolog√≠a: conocimiento y pr√°ctica profesional : perspectivas y problem√°ticas actuales - Tomo IFacultad de Psicolog√≠
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