Mantenimiento del sistema de aire acondicionado y presurización de la aeronave Grumman Gulfstream I

Tesis (Ingeniería Aeronáutica), Instituto Politécnico Nacional, UPIIG, Campus Guanajuato, 2014, 1 archivo PDF, (135 páginas), tesis.ipn.m

Fortalecimiento de la habilidad lectora en inglés con textos icónicos haciendo uso de un OVA en séptimo grado de la institución educativa Gabriel Escorcia Gravini de Soledad, Atlántico

El objetivo de este estudio es fortalecer la habilidad lectora en inglés con Textos Icónicos haciendo uso de un objeto virtual de aprendizaje en los estudiantes de una institución educativa oficial de Soledad, Atlántico. Para el desarrollo de la investigación se empleó un enfoque cualitativo, bajo el tipo de investigación acción en una muestra de 10 estudiantes. El estudio se llevó a cabo en cuatro fases las cuales fueron, el diagnóstico, el diseño, la implementación y la evaluación o reflexión. El principal resultado de la fue el aumento del nivel de comprensión lectora en textos en inglés logrando alcanzar altos porcentajes en categorías que en un inicio demostraban dificultades y debilidades en el estudiantado. Lo anterior permitió concluir que es indispensable incluir recursos en la programación didáctica para satisfacer las necesidades académicas de los estudiantes y promover la adquisición de lenguas extranjeras, puesto que ayudan a crear nuevos entornos de aprendizaje en los que los estudiantes se sientan más motivados, comprometidos, independientes y con mayor responsabilidad de su propio aprendizaje.Tabla de Contenido Capítulo 1. Introducción 13 planteamiento del problema 15 Formulación del problema 17 Antecedentes 17 Justificación 22 Objetivo General 25 Objetivos Específicos 25 Supuestos y Constructos 25 Alcances y Limitaciones 26 Capítulo 2. Marco de Referencia 28 Marco Contextual 28 Marco Legal 33 Marco Teórico 36 Comprensión lectora en inglés 36 Textos icónicos 39 Objeto Virtual de Aprendizaje (OVA) 43 Marco Conceptual 47 Capítulo 3. Metodología 51 Tipo de Investigación 51 Población y Muestra 52 Categorías 54 Indicadores 55 Técnicas e Instrumentos de Investigación 57 Valoración de instrumentos por expertos 62 Ruta de Investigación 62 Modelo de Investigación 63 Fases del Modelo 64 Técnicas de análisis de la información usadas 67 Capítulo 4. Intervención Pedagógica 69 Fase de Diseño de la Estrategia Pedagógica 69 Fase de Implementación 78 Capítulo 5. Análisis, Resultados y Conclusiones 81 Fase Diagnostica 81 Resultados y Análisis Test Diagnóstico Inicial 81 Resultados y Análisis de la encuesta (antes de la intervención) 83 Resultados y Análisis del diario de campo 91 Triangulación de la información de la etapa de análisis 93 Fase de implementación 96 Resultados y Análisis de la rúbrica 96 Fase de evaluación 100 Resultados y Análisis del Postest 100 Triangulación de la información de la etapa de implementación y validación 102 Conclusiones 105 Recomendaciones 107 Referencias. 109 Anexos 120MaestríaMagíster en Recursos Digitales Aplicados a la Educació

UCx target production at TRIUMF in the ARIEL era

The Advanced Rare IsotopE Laboratory (ARIEL) will increase TRIUMF’s radioactive ion beam capabilities. As part of the ARIEL target material research and development campaign, a new method to produce targets of mixed uranium carbide with excess graphite has been proposed and tested. The resulting material is comparable in composition with the conventional target material and is produced ten times faster. The reduction in production time will liberate the resources and equipment for research and development leading to new target materials with improved radioisotope release properties for ARIEL

Medical isotope collection from ISAC targets

The ISAC facility (Isotope Separation and Acceleration) at TRIUMF has recently started to provide isotopes for pre-clinical nuclear medicine studies. By irradiating ISOL (Isotope Separation OnLine) targets with a 480 MeV proton beam from the TRIUMF H- cyclotron, the facility can deliver a large variety of radioactive isotope beams (RIB) for research in the fields of nuclear astrophysics, nuclear structure and material science with half-lives down to a few milliseconds via an electrostatic beamline network. For the collection of medical isotopes, typically with half-lives in the range of hours or days, we have developed a compact apparatus for the implantation of mass-separated RIB on a target disc at energies between 20-55 keV. In this paper, we also discuss two different retrieval methods of the implanted activity from the implantation target: by chemical etching of the target surface and by recoil collection of implanted alpha emitters

Medical isotope collection from ISAC targets

The ISAC facility (Isotope Separation and Acceleration) at TRIUMF has recently started to provide isotopes for pre-clinical nuclear medicine studies. By irradiating ISOL (Isotope Separation OnLine) targets with a 480 MeV proton beam from the TRIUMF H- cyclotron, the facility can deliver a large variety of radioactive isotope beams (RIB) for research in the fields of nuclear astrophysics, nuclear structure and material science with half-lives down to a few milliseconds via an electrostatic beamline network. For the collection of medical isotopes, typically with half-lives in the range of hours or days, we have developed a compact apparatus for the implantation of mass-separated RIB on a target disc at energies between 20-55 keV. In this paper, we also discuss two different retrieval methods of the implanted activity from the implantation target: by chemical etching of the target surface and by recoil collection of implanted alpha emitters

Mortality after surgery in Europe: a 7 day cohort study

Background: Clinical outcomes after major surgery are poorly described at the national level. Evidence of heterogeneity between hospitals and health-care systems suggests potential to improve care for patients but this potential remains unconfirmed. The European Surgical Outcomes Study was an international study designed to assess outcomes after non-cardiac surgery in Europe.Methods: We did this 7 day cohort study between April 4 and April 11, 2011. We collected data describing consecutive patients aged 16 years and older undergoing inpatient non-cardiac surgery in 498 hospitals across 28 European nations. Patients were followed up for a maximum of 60 days. The primary endpoint was in-hospital mortality. Secondary outcome measures were duration of hospital stay and admission to critical care. We used χ² and Fisher’s exact tests to compare categorical variables and the t test or the Mann-Whitney U test to compare continuous variables. Significance was set at p<0·05. We constructed multilevel logistic regression models to adjust for the differences in mortality rates between countries.Findings: We included 46 539 patients, of whom 1855 (4%) died before hospital discharge. 3599 (8%) patients were admitted to critical care after surgery with a median length of stay of 1·2 days (IQR 0·9–3·6). 1358 (73%) patients who died were not admitted to critical care at any stage after surgery. Crude mortality rates varied widely between countries (from 1·2% [95% CI 0·0–3·0] for Iceland to 21·5% [16·9–26·2] for Latvia). After adjustment for confounding variables, important differences remained between countries when compared with the UK, the country with the largest dataset (OR range from 0·44 [95% CI 0·19 1·05; p=0·06] for Finland to 6·92 [2·37–20·27; p=0·0004] for Poland).Interpretation: The mortality rate for patients undergoing inpatient non-cardiac surgery was higher than anticipated. Variations in mortality between countries suggest the need for national and international strategies to improve care for this group of patients.Funding: European Society of Intensive Care Medicine, European Society of Anaesthesiology