1,494 research outputs found

    Realizing live sequence charts in SystemVerilog.

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    The design of an embedded control system starts with an investigation of properties and behaviors of the process evolving within its environment, and an analysis of the requirement for its safety performance. In early stages, system requirements are often specified as scenarios of behavior using sequence charts for different use cases. This specification must be precise, intuitive and expressive enough to capture different aspects of embedded control systems. As a rather rich and useful extension to the classical message sequence charts, live sequence charts (LSC), which provide a rich collection of constructs for specifying both possible and mandatory behaviors, are very suitable for designing an embedded control system. However, it is not a trivial task to realize a high-level design model in executable program codes effectively and correctly. This paper tackles the challenging task by providing a mapping algorithm to automatically synthesize SystemVerilog programs from given LSC specifications

    Molecular Mechanisms of Trastuzumab Resistance in HER2 Overexpressing Breast Cancer

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    The epidermal growth factor receptor 2 (HER2) is a tyrosine kinase overexpressed in nearly 20% to 25% of invasive breast cancers. Trastuzumab is a humanized monoclonal antibody that targets HER2. The majority of patients with metastatic breast cancer initially respond to trastuzumab, however, within 1 year of treatment disease progresses. Several molecular mechanisms have been described as contributing to the development of trastuzumab resistance. They could be grouped as impaired access of trastuzumab to HER2, upregulation of HER2 downstream signaling pathways, signaling of alternative pathways, and impaired immune antitumor mechanisms. However, since many of them have overlapping effects, it would be of great clinical impact to identify the principal signaling pathways involved in drug resistance. Significant efforts are being applied to find other therapeutic modalities besides trastuzumab treatment to be used alone or in combination with current modalities

    The Impact of Directionality in Predications on Text Mining

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    The number of publications in biomedicine is increasing enormously each year. To help researchers digest the information in these documents, text mining tools are being developed that present co-occurrence relations between concepts. Statistical measures are used to mine interesting subsets of relations. We demonstrate how directionality of these relations affects interestingness. Support and confidence, simple data mining statistics, are used as proxies for interestingness metrics. We first built a test bed of 126,404 directional relations extracted from biomedical abstracts, which we represent as graphs containing a central starting concept and 2 rings of associated relations. We manipulated directionality in four ways and randomly selected 100 starting concepts as a test sample for each graph type. Finally, we calculated the number of relations and their support and confidence. Variation in directionality significantly affected the number of relations as well as the support and confidence of the four graph types

    Profesionales vs. profanos : Poder y representación en una red de organizaciones sociales

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    El objetivo del presente artículo es analizar la división del trabajo político de una red de organizaciones sociales lideradas por una ONG de Promoción y Desarrollo (ONGPD), explorando el capital político como mecanismo para obtener reconocimiento, el que permite imponer los criterios propios de valores frente a otros y establecer las reglas de juego. El juego del campo político descansa sobre la exclusión de aquellos que poseen un capital político menor. De ahí que los "profesionales" del campo de las políticas sociales están legitimados a decir y hacer, no por la relación directa con las organizaciones representadas (los "profanos") a través de la figura de la red, sino en relación con los otros miembros del campo (técnicos, políticos o funcionarios). Esta suerte de efecto de cerramiento es el resultado de la autonomización del espacio político, que cuanto más avanza según su lógica propia, profundiza la ruptura con los profanos. Sin embargo, cabe señalar que no puede cerrarse por completo: quienes forman parte del centro simbólico de la red deben hacer referencia a aquellos en nombre de los cuales se expresan y frente a quienes deben rendir cuentas, aunque sea de forma relativamente ficticia, para poder permanecer en el mundo de las políticas sociales y sus recursos. La comprensión y explicación, en sus múltiples dimensiones, de las formas locales de construcción del poder de las ONGPD a partir de la crisis de 2001, dentro del marco de las políticas sociales, permite indagar las características de la participación y representación actuales. Por un lado, ¿las ONGPD son un mecanismo de mediación entre los excluidos y el Estado? ¿O los excluidos son mecanismos de mediación entre las ONGPD y el Estado? ¿Quiénes se benefician de esta relación y cómo se construye?Jornadas realizadas junto con el I Encuentro Latinoamericano de Metodología de las Ciencias Sociales.Facultad de Humanidades y Ciencias de la Educació
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