Ajuste lineal de los datos obtenidos en el ensayo de respuesta térmica de suelo del serpentín horizontal - San Luis - Argentina

Este trabajo se realizó con el objeto de aplicar un análisis estadístico de regresión lineal simple y múltiple para un Test de Respuestas Térmicas in situ; En dicho ensayo se determinaron los valores de la conductividad térmica efectiva del subsuelo λeff, y la resistencia térmica Rb, correspondiente a un sistema horizontal de intercambiador particular de calor. Estos ensayos in situ se basan en el modelo de la fuente de línea infinita (ILS), de transferencia de calor por conducción térmica de kelvin; Los valores se obtuvieron por el método gráfico de la pendiente y posteriormente se realzó el estudio estadístico.This work was done in order to apply a statistical analysis of simple and multiple linear regression test for in situ thermal responses; In this test values the effective thermal conductivity of λeff subsoil, and thermal resistance Rb, corresponding to a particular horizontal system heat exchanger were determined. These field tests are based on the model of the source of infinite line (ILS), heat transfer by thermal conduction of kelvin; The values were obtained by the graph slope method and subsequently enhanced statistical study.Tema 6: Energía eólica, geotermia, biomasa y otras energías no convencionales.Facultad de Arquitectura y Urbanism

Ajuste lineal de los datos obtenidos en el ensayo de respuesta térmica de suelo del serpentín horizontal - San Luis - Argentina

Este trabajo se realizó con el objeto de aplicar un análisis estadístico de regresión lineal simple y múltiple para un Test de Respuestas Térmicas in situ; En dicho ensayo se determinaron los valores de la conductividad térmica efectiva del subsuelo λeff, y la resistencia térmica Rb, correspondiente a un sistema horizontal de intercambiador particular de calor. Estos ensayos in situ se basan en el modelo de la fuente de línea infinita (ILS), de transferencia de calor por conducción térmica de kelvin; Los valores se obtuvieron por el método gráfico de la pendiente y posteriormente se realzó el estudio estadístico.This work was done in order to apply a statistical analysis of simple and multiple linear regression test for in situ thermal responses; In this test values the effective thermal conductivity of λeff subsoil, and thermal resistance Rb, corresponding to a particular horizontal system heat exchanger were determined. These field tests are based on the model of the source of infinite line (ILS), heat transfer by thermal conduction of kelvin; The values were obtained by the graph slope method and subsequently enhanced statistical study.Tema 6: Energía eólica, geotermia, biomasa y otras energías no convencionales.Facultad de Arquitectura y Urbanism

Ajuste lineal de los datos obtenidos en el ensayo de respuesta térmica de suelo del serpentín horizontal - San Luis - Argentina

Este trabajo se realizó con el objeto de aplicar un análisis estadístico de regresión lineal simple y múltiple para un Test de Respuestas Térmicas in situ; En dicho ensayo se determinaron los valores de la conductividad térmica efectiva del subsuelo λeff, y la resistencia térmica Rb, correspondiente a un sistema horizontal de intercambiador particular de calor. Estos ensayos in situ se basan en el modelo de la fuente de línea infinita (ILS), de transferencia de calor por conducción térmica de kelvin; Los valores se obtuvieron por el método gráfico de la pendiente y posteriormente se realzó el estudio estadístico.This work was done in order to apply a statistical analysis of simple and multiple linear regression test for in situ thermal responses; In this test values the effective thermal conductivity of λeff subsoil, and thermal resistance Rb, corresponding to a particular horizontal system heat exchanger were determined. These field tests are based on the model of the source of infinite line (ILS), heat transfer by thermal conduction of kelvin; The values were obtained by the graph slope method and subsequently enhanced statistical study.Tema 6: Energía eólica, geotermia, biomasa y otras energías no convencionales.Facultad de Arquitectura y Urbanism

Fredkin Gates for Finite-valued Reversible and Conservative Logics

The basic principles and results of Conservative Logic introduced by Fredkin and Toffoli on the basis of a seminal paper of Landauer are extended to d-valued logics, with a special attention to three-valued logics. Different approaches to d-valued logics are examined in order to determine some possible universal sets of logic primitives. In particular, we consider the typical connectives of Lukasiewicz and Godel logics, as well as Chang's MV-algebras. As a result, some possible three-valued and d-valued universal gates are described which realize a functionally complete set of fundamental connectives.Comment: 57 pages, 10 figures, 16 tables, 2 diagram

T cell receptor Vbeta gene usage in Thai children with dengue virus infection

T lymphocyte activation during dengue is thought to contribute to the pathogenesis of dengue hemorrhagic fever (DHF). We examined the T cell receptor Vbeta gene usage by a reverse transcriptase-polymerase chain reaction assay during infection and after recovery in 13 children with DHF and 13 children with dengue fever (DF). There was no deletion of specific Vbeta gene families. We detected significant expansions in usage of single Vbeta families in six subjects with DHF and three subjects with DF over the course of infection, but these did not show an association with clinical diagnosis, viral serotype, or HLA alleles. Differences in Vbeta gene usage between subjects with DHF and subjects with DF were of borderline significance. These data suggest that the differences in T cell activation in DHF and DF are quantitative rather than qualitative and that T cells are activated by conventional antigen(s) and not a viral superantigen

A neurovascular high-frequency optical coherence tomography system enables in situ cerebrovascular volumetric microscopy

Intravascular imaging has emerged as a valuable tool for the treatment of coronary and peripheral artery disease; however, no solution is available for safe and reliable use in the tortuous vascular anatomy of the brain. Endovascular treatment of stroke is delivered under image guidance with insufficient resolution to adequately assess underlying arterial pathology and therapeutic devices. High-resolution imaging, enabling surgeons to visualize cerebral arteries\u27 microstructure and micron-level features of neurovascular devices, would have a profound impact in the research, diagnosis, and treatment of cerebrovascular diseases. Here, we present a neurovascular high-frequency optical coherence tomography (HF-OCT) system, including an imaging console and an endoscopic probe designed to rapidly acquire volumetric microscopy data at a resolution approaching 10 microns in tortuous cerebrovascular anatomies. Using a combination of in vitro, ex vivo, and in vivo models, the feasibility of HF-OCT for cerebrovascular imaging was demonstrated

High-resolution Imaging of Myeloperoxidase Activity Sensors in Human Cerebrovascular Disease

Progress in clinical development of magnetic resonance imaging (MRI) substrate-sensors of enzymatic activity has been slow partly due to the lack of human efficacy data. We report here a strategy that may serve as a shortcut from bench to bedside. We tested ultra high-resolution 7T MRI (microMRI) of human surgical histology sections in a 3-year IRB approved, HIPAA compliant study of surgically clipped brain aneurysms. microMRI was used for assessing the efficacy of MRI substrate-sensors that detect myeloperoxidase activity in inflammation. The efficacy of Gd-5HT-DOTAGA, a novel myeloperoxidase (MPO) imaging agent synthesized by using a highly stable gadolinium (III) chelate was tested both in tissue-like phantoms and in human samples. After treating histology sections with paramagnetic MPO substrate-sensors we observed relaxation time shortening and MPO activity-dependent MR signal enhancement. An increase of normalized MR signal generated by ultra-short echo time MR sequences was corroborated by MPO activity visualization by using a fluorescent MPO substrate. The results of microMRI of MPO activity associated with aneurysmal pathology and immunohistochemistry demonstrated active involvement of neutrophils and neutrophil NETs as a result of pro-inflammatory signalling in the vascular wall and in the perivascular space of brain aneurysms

Los sistemas ganaderos bovinos y los gases de efecto invernadero en el sur de San Luis

Argentina, con su gran variedad de suelos y clima, tiene una economía basada fundamentalmente en la producción agropecuaria por lo que no es ajena a los efectos debido al cambio climático. En orden de importancia, las emisiones de metano (CH4) ligada a las producciones agro-ganaderas, a escala nacional, es una de las contribuyentes a la emisión de gases de efecto invernadero (GEI) (SAGyP, 2007). Estas emisiones se producen debido a diversos factores, entre otros, al tipo de tecnología de manejo que se aplique. El objetivo de este trabajo fue analizar las estimaciones de las emisiones de metano (CH4) y óxido nitroso (N2O) en los sistemas ganaderos bovinos del sur del departamento Capital de la provincia de San Luis