941 resultados para Stewart-Gough platform (SGP)


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This paper is focused on the robot mobile platform PRIM (platform robot information multimedia). This robot has been made in order to cover two main needs of our group, on one hand the need for a full open mobile robotic platform that is very useful in fulfilling the teaching and research activity of our school community, and on the other hand with the idea of introducing an ethical product which would be useful as mobile multimedia information point as a service tool. This paper introduces exactly how the system is made up and explains just what the philosophy is behind this work. The navigation strategies and sensor fusion, where machine vision system is the most important one, are oriented towards goal achievement and are the key to the behaviour of the robot

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Este trabajo de investigación se ha desarrollado en busca de estrategias para el sector del cuero en Colombia, buscando mejorar la competitividad de las empresas a nivel interno e internacional, especialmente para penetrar el mercado de la unión Euro

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El objetivo principal de este documento es establecer los principales elementos que permitirán, o no, una renovación del SPG para los países de la CAN, por parte de la Unión Europea.

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Un clúster es entendido por la gran mayoría como un gran conglomerado de empresas que giran en torno a un objetivo, en su gran mayoría económico. Su intención es competir con otros conglomerados en cuanto a precios y cantidades, ya que de manera individual no podrían. En consecuencia, esta unión se utiliza en un principio para crear ventajas tanto competitivas como comparativas en contra de la competencia, lo cual genera un valor a esta unión, con el fin de producir fidelidad en el cliente y recordación de todos los productos que tal unión brinde. Según estudios realizados por diversos autores, en muchas ocasiones, los clúster no se crean con una finalidad económica, sino como desarrollo de un perfil comunitario que ayude a la sociedad y las organizaciones que la componen. La base de las relaciones se centra en la comunicación y en las diversas técnicas que existen en ese ámbito para asegurar la sostenibilidad de la organización. Dentro de estas relaciones, se le da un reconocimiento a la educación y la cultura en donde se encuentra ubicado el clúster, ya que las estrategias que se implementen se relacionan directamente con las necesidades de los clientes, generando en el pensamiento de la comunidad la perdurabilidad y sostenibilidad como efecto del desarrollo social.

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Introducción: El tratamiento con antagonistas del factor de necrosis tumoral alfa (anti TNF) ha impactado el pronóstico y la calidad de vida de los pacientes con artritis reumatoide (AR) positivamente, sin embargo, se interroga un incremento en el riesgo de desarrollar melanoma. Objetivo: Conocer la asociación entre el uso de anti TNF y el desarrollo de melanoma maligno en pacientes con AR. Metodología: Se realizó una búsqueda sistemática en MEDLINE, EMBASE, COCHRANE LIBRARY y LILACS para ensayos clínicos, estudios observacionales, revisiones y meta-análisis en pacientes adultos con diagnóstico de AR y manejo con anti TNF (Certolizumab pegol, Adalimumab, Etanercept, Infliximab y Golimumab). Resultados: 37 estudios clínicos cumplieron los criterios de inclusión para el meta-análisis, con una población de 16567 pacientes. El análisis de heterogeneidad no fue significativo (p=1), no se encontró diferencia en el riesgo entre los grupos comparados DR -0.00 (IC 95% -0.001; -0.001). Un análisis adicional de los estudios en los que se reportó al menos 1 caso de melanoma (4222 pacientes) tampoco mostró diferencia en el riesgo DR -0.00 (IC 95% -0.004 ; -0.003). Conclusión: En la evidencia disponible a la fecha no encontramos asociación significativa entre el tratamiento con anti TNF en pacientes con diagnóstico de AR y el desarrollo de melanoma cutáneo.

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Introducción: Los pacientes en postoperatorio de trasplante hepático presentan múltiples cambios hemodinámicos y alteraciones hidroelectrolíticas que generan cambios en el estado ácido base. El presente trabajo, busca describir el comportamiento ácido base en pacientes pos trasplante hepático, a través del análisis del modelo de Stewart, enfocado en la búsqueda etiológica de cada trastorno y planteando posibles formas de optimizar el manejo en Cuidado Intensivo (CI). Metodología: Estudio observacional, descriptivo histórico de los gases arteriales de los pacientes en post operatorio de trasplante hepático por cualquier causa, interpretados por método de Stewart. Se realizó con el universo de pacientes ingresados en el año 2014 en la Fundación Santa Fe de Bogotá. Resultados: Ingresaron en total 24 pacientes al estudio, entre el 1 de enero al 31 de septiembre de 2014. La mediana de pH fue de 7.36 con un valor mínimo de 7.05 y el máximo de 7.49. El 41% de los pacientes al ingreso a cuidado intensivo tenían lactato normal (menor a 2), y el 88% tenían niveles de albumina bajos. El trastorno electrolítico más común fue hipercloremia (58%), seguido de hipomagnesemia (25%). Conclusiones. El análisis de gases arteriales por el modelo de Stewart permite realizar un diagnóstico de un trastorno específico y adicionalmente, permite buscar la etiología del trastorno. Esta serie de casos mostró que el 95% de los pacientes tenían algún trastorno metabólico al ingreso, siendo el más frecuente la acidosis metabólica (66%).

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Con base en la revisión de la literatura realizada acerca de los roles directivos y del rol de uno en particular que es el CIO, y tomando como referencia la información suministrada por los directivos de tecnologías de Información de las organizaciones Alpina, Banco de Bogotá y Grupo AVAL, el trabajo de investigación hace una descripción del contenido del rol de CIO e identifica las habilidades requeridas para el ejercicio de este rol en dichas organizaciones. Se espera que los resultados del presente estudio generen un valioso aporte como retroalimentación para la academia y las empresas acerca de la formación de los futuros CIO.

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The ongoing reforms, which were introduced under the Bologna Process and have already been extended outside of Europe , are a unique opportunity for reinforcing and structuring a common platform of understanding among members, based on the full time undergraduate courses in ( Urbanismo) Urban and Regional Planning. The training programs at this 1st cycle level, will obviously continue with the 2nd and 3rd cycles (Bachelor's Degree, Master's Degree and PhD Degree or 3+2+3 years). The training programs at this full time 1st cycle level, can also becomes the framework of understanding for the development of research in the urban fields at national and international levels.

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Aerosols from anthropogenic and natural sources have been recognized as having an important impact on the climate system. However, the small size of aerosol particles (ranging from 0.01 to more than 10 μm in diameter) and their influence on solar and terrestrial radiation makes them difficult to represent within the coarse resolution of general circulation models (GCMs) such that small-scale processes, for example, sulfate formation and conversion, need parameterizing. It is the parameterization of emissions, conversion, and deposition and the radiative effects of aerosol particles that causes uncertainty in their representation within GCMs. The aim of this study was to perturb aspects of a sulfur cycle scheme used within a GCM to represent the climatological impacts of sulfate aerosol derived from natural and anthropogenic sulfur sources. It was found that perturbing volcanic SO2 emissions and the scavenging rate of SO2 by precipitation had the largest influence on the sulfate burden. When these parameters were perturbed the sulfate burden ranged from 0.73 to 1.17 TgS for 2050 sulfur emissions (A2 Special Report on Emissions Scenarios (SRES)), comparable with the range in sulfate burden across all the Intergovernmental Panel on Climate Change SRESs. Thus, the results here suggest that the range in sulfate burden due to model uncertainty is comparable with scenario uncertainty. Despite the large range in sulfate burden there was little influence on the climate sensitivity, which had a range of less than 0.5 K across the ensemble. We hypothesize that this small effect was partly associated with high sulfate loadings in the control phase of the experiment.

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This paper reports on a new satellite sensor, the Geostationary Earth Radiation Budget (GERB) experiment. GERB is designed to make the first measurements of the Earth's radiation budget from geostationary orbit. Measurements at high absolute accuracy of the reflected sunlight from the Earth, and the thermal radiation emitted by the Earth are made every 15 min, with a spatial resolution at the subsatellite point of 44.6 km (north–south) by 39.3 km (east–west). With knowledge of the incoming solar constant, this gives the primary forcing and response components of the top-of-atmosphere radiation. The first GERB instrument is an instrument of opportunity on Meteosat-8, a new spin-stabilized spacecraft platform also carrying the Spinning Enhanced Visible and Infrared (SEVIRI) sensor, which is currently positioned over the equator at 3.5°W. This overview of the project includes a description of the instrument design and its preflight and in-flight calibration. An evaluation of the instrument performance after its first year in orbit, including comparisons with data from the Clouds and the Earth's Radiant Energy System (CERES) satellite sensors and with output from numerical models, are also presented. After a brief summary of the data processing system and data products, some of the scientific studies that are being undertaken using these early data are described. This marks the beginning of a decade or more of observations from GERB, as subsequent models will fly on each of the four Meteosat Second Generation satellites.

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Collaborative software is usually thought of as providing audio-video conferencing services, application/desktop sharing, and access to large content repositories. However mobile device usage is characterized by users carrying out short and intermittent tasks sometimes referred to as 'micro-tasking'. Micro-collaborations are not well supported by traditional groupware systems and the work in this paper seeks out to address this. Mico is a system that provides a set of application level peer-to-peer services for the ad-hoc formation and facilitation of collaborative groups across a diverse mobile device domain. The system builds on the Java ME bindings of the JXTA P2P protocols, and is designed with an approach to use the lowest common denominators that are required for collaboration between varying degrees of mobile device capability. To demonstrate how our platform facilitates application development, we built an exemplary set of demonstration applications and include code examples here to illustrate the ease and speed afforded when developing collaborative software with Mico.

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Robotic and manual methods have been used to obtain identification of significantly changing proteins regulated when Schizosaccharomyces pombe is exposed to oxidative stress. Differently treated S. pombe cells were lysed, labelled with CyDye and analysed by two-dimensional difference gel electrophoresis. Gel images analysed off-line, using the DeCyder image analysis software [GE Healthcare, Amersham, UK] allowed selection of significantly regulated proteins. Proteins displaying differential expression were excised robotically for manual digestion and identified by matrix-assisted laser desorption/ionisation - mass spectrometry (MALDI-MS). Additionally the same set of proteins displaying differential expression were automatically cut and digested using a prototype robotic platform. Automated MALDI-MS, peak label assignment and database searching were utilised to identify as many proteins as possible. The results achieved by the robotic system were compared to manual methods. The identification of all significantly altered proteins provides an annotated peroxide stress-related proteome that can be used as a base resource against which other stress-induced proteomic changes can be compared.