Modelagem matemática do controle alveolar de agentes anestésicos inalatórios

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica

Efeitos tardios da torção testicular sobre a espermatogênese do testículo contralateral e o valor preventivo da orquiepididimectomia do testículo torcido em ratos púberes

Resum

Qualitative assessment of lean production and identification of losses in small business : a case study in a central telephone manufacturer

O presente estudo teve por objetivo avaliar as sete principais perdas nos processos produtivos de uma pequena empresa a partir do Sistema de Gerenciamento Lean. Seguiu uma metodologia exploratória, qualitativa, realizada através de estudo de caso em que foram cruzadas a análise de informações obtidas através de visitas de observação na empresa; entrevistas com gestores; e aplicação de uma lista de verificação em implementação de práticas lean. Os resultados apontaram as perdas em relação ao contexto nacional de tecnologia de pequenas e médias empresas (PMEs), avançando sobre um campo de estudo ainda em aberto e necessário no Brasil. Destacou-se o fato de a empresa adotar algumas práticas de produção enxuta, associadas a uma composição empurrada de produção, tradicional neste tipo de indústria. Nesse contexto, as principais perdas identificadas – superprodução, processamento, espera, estoque, produtos defeituosos – foram condizentes com a realidade de fraqueza na integração com a cadeia de fornecedores, no balanceamento da produção e na continuidade da produção.The present study aimed to assess the seven major losses in production processes of a small company through the Lean Management System. Following an exploratory methodology, qualitative, through a case study in which they were cross-analyzed of information obtained through observation, visits in the company, interviews with managers, and an application of a checklist for implementation of lean practices. The results of the main losses were shown in a case study in relation to the national context of technology for small and medium enterprises (SMEs), moving over a field of study still open and needed in Brazil. It was emphasized the fact that the company adopts some practices of lean production associated with pushed practices, in a production composition that is traditional in this kind of industry. In this context, the main losses identified – overproduction, processing, waiting, inventory, defective products – are consistent with the reality of weakness in the integration with the supply chain, the balancing of production and continued production

Dynamic stabilization of L2 periodic orbits using attitude-orbit coupling effects

Numerical explorations show how the known periodic solutions of the Hill problem are modified in the case of the attitude-orbit coupling that may occur for large satellite structures. We focus on the case in which the elongation is the dominant satellite?s characteristic and find that a rotating structure may remain with its largest dimension in a plane parallel to the plane of the primaries. In this case, the effect produced by the non-negligible physical dimension is dynamically equivalent to the perturbation produced by an oblate central body on a masspoint satellite. Based on this, it is demonstrated that the attitude-orbital coupling of a long enough body may change the dynamical characteristics of a periodic orbit about the collinear Lagrangian points

Relé de fase ajustável, sistema de controle contendo o mesmo e método de ajuste de fase de relé

Universidade Federal do Rio Grande do SulEngenhariaDepositad

Gestão de design e desenvolvimento de produtos na indústria moveleira

A percepção do uso do design como um elemento importante para a obtenção de vantagem competitiva desperta nas empresas a necessidade de gerenciar estrategicamente as suas atividades projetuais, avançando para além da simples preocupação estética. Este artigo tem como objetivo identificar processos de Gestão de Design no desenvolvimento de produtos na indústria moveleira. A metodologia utilizada foi a exploratória, de natureza qualitativa, através de entrevistas realizadas em profundidade, com quatro profissionais inseridos em equipes de design de empresas da indústria moveleira da Região Sul do Brasil. Posteriormente foi produzida uma análise das respostas, possibilitando- -se a comparação dos dados obtidos com o referencial teórico pesquisado. Os resultados apontam para uma Gestão de Design, ainda em modo tático, nas empresas pesquisadas. Novas oportunidades de pesquisas vislumbram-se em outros setores econômicos, visando à identificação da visão estratégica das empresas em relação aos processos de design.The use of design as an important element for gaining competitive advantage in business arises the need to manage design strategically, including projectual activities per se. This article aims to explore and identify product development and Design Management processes in the furniture industry of South Brazil, a very strong industrial sector in the country. To achieve it purposes, the methodology applied was qualitative, through in deep interviews with four design professionals of the furniture industry. An analysis of the responses allowed the comparison of these data with the theoretical foundation. The results showed Design Management as initial processes in the companies researched and new opportunities to companies in engaging new design management tools and processes

Constructal Design of Elliptical Conduits for Cooling of Gas Turbine Blades with External Thermal Barrier Coating

Gas turbines (GTs) are thermal machines used to transform the energy released in combustion with a hydrocarbon into mechanical power, in order to drive a machine or generate thrust in aircraft. The critical issue in the GT design are the parts exposed to extreme mechanical and thermal conditions, e.g., the first row of turbine blades. The GT thermal efficiency is limited by the maximum temperature the blade materials can withstand without softening or creeping. Currently, the maximum operating temperature is above the softening point of the blade material thanks to techniques of ceramic coatings of low thermal conductivity, called Thermal Barrier Coating (TBC), and techniques of blade cooling. The internal cooling of blades involves conduits inside them for air that comes from a bleed in an intermediate compressor stage. The air bleeding is around 3 to 5% of the main GT flow. This air and the heat flow that it receives are not used to generate power, so it is necessary to optimize the cooling techniques in order to control the temperature using the least amount of air and minimum heat flux evacuated, for holding the GT overall efficiency high. The present work studies the internal cooling of Elemental Gas Turbine Blade (EGTB) with a fixed thickness of the TBC and the optimization of the conduit shape and position over a cross section in 2D. The optimization is carried out by exhaustive searching method based on the Constructal Theory. The optimization of the position, size, and aspect ratio of EGTBs was done for two types of standard elliptical conduits of different geometries, uniformly distributed. Two different objective functions are analyzed: minimum maximum temperature on the metal and maximum heat evacuation efficiency. The outcome of this work establishes that the use of elliptical conduits of aspect ratio 2:5 leads to improvement in the thermal performance of cooled blades. As compared with circular conduits of the same area, elliptical conduits allow transfer of a greater amount of heat; with a correct design, they enable a lower maximum temperature on the metal. Besides, the constructal designs obtained in this study for the minimum maximum relative temperature ˜ T max or maximum heat evacuation efficiency ξ were not identical.Este trabajo tiene una enmienda (ver "Documentos relacionados").Facultad de Ingenierí

Phenotypic effects of different doses of physical and chemical mutagens in cotton plants

Induced mutation techniques have been effectively used to obtain new variability in crop plants. Mutations are the primary source of genetic variability and therefore, some control over their frequency can be considered a valuable tool for plant breeding. Mutagens can be grouped into two broad categories according to their nature: physical and chemical. Doses must be optimized to increase the chances of generating mutants and achieve a population of mutagenized plants that allow a successful selection of mutants of interest. The aim of this study was to test the sensitivity of different mutagenic agents on Guazuncho 3 variety cotton seeds. Four doses of each treatment were evaluated and different phenotypic traits were recorded. The greatest effects on germination percentage, germination velocity index, plant survival and somatic effects were observed in treatments with ethyl methanesulfonate (EMS) as the doses increased. Lower but significant effects were recorded in sodium azide (SA) treatments and no significant differences were observed for X-rays and combined treatments (SA+X-rays). The effects on growth rate were significant in chemical treatments with R2 = 0.84 for SA and R2 = 0.97 for EMS. In addition, it was observed that the EMS and X-rays treatments caused a greater number of off-type plants and chlorotic irregular-shaped spots. The results of this preliminary study determined the mutagens doses to be used on Guazuncho 3 cotton seeds, to generate an M1 population for developing a mutation breeding program.Las técnicas de mutaciones inducidas se han utilizado eficazmente para obtener nueva variabilidad en las plantas de cultivo. Las mutaciones son la principal fuente de variabilidad genética y, por lo tanto, cierto control sobre su frecuencia puede considerarse una herramienta valiosa para el fitomejoramiento. Los mutágenos pueden agruparse en dos grandes categorías según su naturaleza: físicos y químicos. Las dosis deben optimizarse para aumentar las posibilidades de generar mutantes y lograr una población de plantas mutagenizadas que permita una selección exitosa de mutantes de interés. El objetivo de este estudio fue evaluar la sensibilidad de diferentes agentes mutagénicos en semillas de algodón de la variedad Guazuncho 3. Se evaluaron cuatro dosis de cada tratamiento y se registraron diferentes caracteres fenotípicos. Los mayores efectos sobre el porcentaje de germinación, el índice de velocidad de germinación, la supervivencia de las plantas y los efectos somáticos se observaron en los tratamientos con metanosulfonato de etilo (EMS) a medida que aumentaban las dosis. Se registraron efectos menores pero significativos en los tratamientos con azida sódica (SA) y no se observaron diferencias significativas en los tratamientos con rayos X y combinados (SA + rayos X). Los efectos sobre la tasa de crecimiento fueron significativos en los tratamientos químicos con R2 = 0,84 para SA y R2 = 0,97 para EMS. Además, se observó que los tratamientos con EMS y rayos X provocaron un mayor número de plantas fuera de tipo y manchas cloróticas de forma irregular. Los resultados de este estudio preliminar determinaron las dosis de mutágenos a utilizar en semillas de algodón Guazuncho 3, con el fin de generar una población M1 para desarrollar un programa de mejoramiento de mutaciones.EEA ReconquistaFil: Winkler, Horacio Martín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Winkler, Horacio Martín. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cereijo, Antonela Estefanía. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Cereijo, Antonela Estefanía. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Scarpin, Gonzalo Joel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Dileo, Pablo Nahuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Muchut, Robertino José. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Muchut, Robertino José. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Roeschlin, Roxana Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Roeschlin, Roxana Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lorenzini, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Lorenzini, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Paytas, Marcelo Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Landau, Alejandra Mabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentin

Variedades nuevas en Argentina. Evaluación en dos fechas de siembra

El algodón (Gossypium hirsutum L.) es un cultivo regional y de gran importancia en la economía santafesina siendo esta la 3er provincia con mayor superficie sembrada en el país. En la campaña 2019/20, según datos oficiales la superficie de algodón sembrada en el país fue de aproximadamente 460.000 ha. La provincia de Santa Fe participó con 73.650 ha repartidas entre los departamentos General Obligado, Vera y 9 de Julio del norte de la provincia.EEA ReconquistaFil: Scarpin, Gonzalo Joel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Dileo, Pablo Nahuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Winkler, Horacio Martín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Lorenzini, Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; ArgentinaFil: Paytas, Marcelo Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista; Argentin