3,345 research outputs found

    Evaluación de la gestión de los procesos de acompañamiento, asesoría y aprobación implementados por la Vicerrectoría de Acción Social de la Universidad de Costa Rica en las etapas de formulación, monitoreo y evaluación de los proyectos de acción dirigidos hacia las unidades académicas y personal docente interesadointeresado

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    La evaluación desarrollada corresponde a la necesidad de conocer las condiciones para fomentar una cultura evaluativa basada en el aprendizaje, para que la Vicerrectoría de Acción Social (VAS) de la Universidad de Costa Rica, pueda mejorar la gestión evaluativa de sus proyectos. Además, buscó conocer sobre las nociones, conceptos y aplicaciones del enfoque de gestión por resultados de los actores institucionales vinculados a los proyectos, de forma tal que se puedan derivar en metodologías y procedimientos para la implementación de un sistema de evaluabilidad de proyectos de acción social. La evaluación realizada fue de tipo interna, formativa y de procesos. Comprendió el periodo desde agosto 2017 hasta octubre 2019, durante el cual se ejecutaron las diversas etapas desde el diseño evaluativo hasta la entrega final de resultados y tuvo los siguientes objetivos General: • Determinar las condiciones de la gestión académica que realiza la VAS en los procesos de asesoría, acompañamiento y aprobación de los proyectos que presentan las unidades académicas y su relación con el fortalecimiento de una cultura de evaluación en los proyectos de Acción Social en la Universidad de Costa Rica. Específicos: • Valorar la pertinencia de las acciones de acompañamiento, asesoría y aprobación implementadas, por la VAS y su relación con el enfoque de gestión por resultados. • Analizar la satisfacción de las personas funcionarias universitarias, que realizan Acción Social en relación con la gestión de VAS, los productos y servicios entregados. • Valorar la eficiencia de la VAS en los ámbitos de gestión presupuestaria, gestión de la comunicación y gestión organizacional, para el cumplimiento de sus objetivos institucionales. La VAS tiene dentro de las funciones asignadas por el Estatuto Orgánico, las de: “organizar, coordinar, dirigir, promover y evaluar los proyectos y actividades que se generan desde la Universidad con grupos y poblaciones del país. También se le asigna el promover, gestionar y articular el desarrollo de la Acción Social de la UCR con calidad, pertinencia social y académica”, sin embargo, los resultados obtenidos en la evaluación difieren en la identificación de acciones sostenibles por parte de la VAS en el cumplimiento de estas funciones. Uno de los retos mayores tiene que ver con la pertinencia y calidad de los procesos de asesoría y acompañamiento hacia el personal docente interesado en realizar proyectos de acción social.UCR::Vicerrectoría de Investigación::Sistema de Estudios de Posgrado::Ciencias Sociales::Maestría Profesional en Evaluación de Programas y Proyectos de Desarroll

    Removing exogenous information using pedigree data

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    Management of certain populations requires the preservation of its pure genetic background. When, for different reasons, undesired alleles are introduced, the original genetic conformation must be recovered. The present study tested, through computer simulations, the power of recovery (the ability for removing the foreign information) from genealogical data. Simulated scenarios comprised different numbers of exogenous individuals taking partofthe founder population anddifferent numbers of unmanaged generations before the removal program started. Strategies were based on variables arising from classical pedigree analyses such as founders? contribution and partial coancestry. The ef?ciency of the different strategies was measured as the proportion of native genetic information remaining in the population. Consequences on the inbreeding and coancestry levels of the population were also evaluated. Minimisation of the exogenous founders? contributions was the most powerful method, removing the largest amount of genetic information in just one generation.However, as a side effect, it led to the highest values of inbreeding. Scenarios with a large amount of initial exogenous alleles (i.e. high percentage of non native founders), or many generations of mixing became very dif?cult to recover, pointing out the importance of being careful about introgression events in populatio

    Cytokine and chemokine response in children with the 2009 pandemic influenza A (H1N1) virus infection

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    We report the systemic cytokine and chemokine response in children with the 2009 pandemic influenza A (H1N1) virus infection. In patients with pneumonia, the serum levels of IFN-γ and IL-5 were significantly higher than those in patients without pneumonia. This tendency was also present for IL-6, IL-8, IL-10, IL-13, and MCP-1 in patients with pneumonia. Among patients with pneumonia, the levels of MCP-1 were significantly higher in the group of patients with pneumonia with severe respiratory failure than patients with mild pneumonia

    Biologic predictors of clinical improvement in rituximab-treated refractory myositis Clinical rheumatology and osteoporosis

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    Background: To examine the longitudinal utility of a biomarker signature in conjunction with myositis autoantibodies (autoAbs) as predictors of disease improvement in refractory myositis patients treated with rituximab. Methods: In the RIM Trial, all subjects received rituximab on 2 consecutive weeks. Using start of treatment as baseline, serum samples (n∈=∈177) were analyzed at baseline and after rituximab with multiplexed sandwich immunoassays to quantify type-1 IFN-regulated and other pro-inflammatory chemokines and cytokines. Biomarker scores were generated for the following pathways: type-1 IFN-inducible (IFNCK), innate, Th1, Th2, Th17 and regulatory cytokines. Myositis autoAbs (anti-synthetase n∈=∈28, TIF-γ n∈=∈19, Mi-2 n∈=∈25, SRP n∈=∈21, MJ n∈=∈18, non-MAA n∈=∈24, unidentified autoantibody n∈=∈9, and no autoantibodies n∈=∈33) determined by immunoprecipitation at baseline, were correlated with outcome measures. Kruskal-Wallis rank sum tests were used for comparisons. Results: The mean (SD) values for muscle disease and physician global disease activity VAS scores (0-100 mm) were 46 (22) and 49 (19). IFNCK scores (median values) were higher at baseline in subjects with anti-synthetase (43), TIF1-γ (31) and Mi-2 (30) compared with other autoAb groups (p∈30) and autoAb group (Mi-2, non-MAA, and undefined autoantibody) demonstrated the greatest clinical improvement based on muscle VAS (muscle-interaction p∈=∈0.075). Conclusion: Biomarker signatures in conjunction with autoAbs help predict response to rituximab in refractory myositis. Biomarker and clinical responses are greatest at 16 weeks after rituximab

    Photo-designed terahertz devices

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    Technologies are being developed to manipulate electromagnetic waves using artificially structured materials such as photonic crystals and metamaterials, with the goal of creating primary optical devices. For example, artificial metallic periodic structures show potential for the construction of devices operating in the terahertz frequency regime. Here we demonstrate the fabrication of photo-designed terahertz devices that enable the real-time, wide-range frequency modulation of terahertz electromagnetic waves. These devices are comprised of a photo-induced, planar periodic-conductive structure formed by the irradiation of a silicon surface using a spatially modulated, femtosecond optical pulsed laser. We also show that the modulation frequency can be tuned by the structural periodicity, but is hardly affected by the excitation power of the optical pump pulse. We expect that our findings will pave the way for the construction of all-optical compact operating devices, such as optical integrated circuits, thereby eliminating the need for materials fabrication processes

    Bi-allelic variants in RNF170 are associated with hereditary spastic paraplegia.

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    Alterations of Ca2+ homeostasis have been implicated in a wide range of neurodegenerative diseases. Ca2+ efflux from the endoplasmic reticulum into the cytoplasm is controlled by binding of inositol 1,4,5-trisphosphate to its receptor. Activated inositol 1,4,5-trisphosphate receptors are then rapidly degraded by the endoplasmic reticulum-associated degradation pathway. Mutations in genes encoding the neuronal isoform of the inositol 1,4,5-trisphosphate receptor (ITPR1) and genes involved in inositol 1,4,5-trisphosphate receptor degradation (ERLIN1, ERLIN2) are known to cause hereditary spastic paraplegia (HSP) and cerebellar ataxia. We provide evidence that mutations in the ubiquitin E3 ligase gene RNF170, which targets inositol 1,4,5-trisphosphate receptors for degradation, are the likely cause of autosomal recessive HSP in four unrelated families and functionally evaluate the consequences of mutations in patient fibroblasts, mutant SH-SY5Y cells and by gene knockdown in zebrafish. Our findings highlight inositol 1,4,5-trisphosphate signaling as a candidate key pathway for hereditary spastic paraplegias and cerebellar ataxias and thus prioritize this pathway for therapeutic interventions

    Brane-World Gravity

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    The observable universe could be a 1+3-surface (the "brane") embedded in a 1+3+\textit{d}-dimensional spacetime (the "bulk"), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk. At least one of the \textit{d} extra spatial dimensions could be very large relative to the Planck scale, which lowers the fundamental gravity scale, possibly even down to the electroweak (\sim TeV) level. This revolutionary picture arises in the framework of recent developments in M theory. The 1+10-dimensional M theory encompasses the known 1+9-dimensional superstring theories, and is widely considered to be a promising potential route to quantum gravity. At low energies, gravity is localized at the brane and general relativity is recovered, but at high energies gravity "leaks" into the bulk, behaving in a truly higher-dimensional way. This introduces significant changes to gravitational dynamics and perturbations, with interesting and potentially testable implications for high-energy astrophysics, black holes, and cosmology. Brane-world models offer a phenomenological way to test some of the novel predictions and corrections to general relativity that are implied by M theory. This review analyzes the geometry, dynamics and perturbations of simple brane-world models for cosmology and astrophysics, mainly focusing on warped 5-dimensional brane-worlds based on the Randall--Sundrum models. We also cover the simplest brane-world models in which 4-dimensional gravity on the brane is modified at \emph{low} energies -- the 5-dimensional Dvali--Gabadadze--Porrati models. Then we discuss co-dimension two branes in 6-dimensional models.Comment: A major update of Living Reviews in Relativity 7:7 (2004) "Brane-World Gravity", 119 pages, 28 figures, the update contains new material on RS perturbations, including full numerical solutions of gravitational waves and scalar perturbations, on DGP models, and also on 6D models. A published version in Living Reviews in Relativit
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