Propulsion
Mostrando 1-12 de 144 artigos, teses e dissertações.
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1. Modelo sintético de baixo custo para treinamento do uso de torniquete
RESUMO Objetivo: apresentar um modelo de baixo custo para treinamento de controle de sangramento com o uso de torniquete e os resultados da avaliação do treinamento. Método: foram utilizados materiais de fácil aquisição e de baixo custo, como espuma de estofado, placa de etileno-acetato de vinila (EVA), bomba plástica de propulsão, recipiente de so
Rev. Col. Bras. Cir.. Publicado em: 20/01/2020
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2. Dimensões e tendências da economia solidária no Brasil
Resumo O artigo realça o valor do Sistema de Informações em Economia Solidária para a compreensão da economia solidária no país, destacando suas possibilidades investigativas no sentido de apurar aspectos relevantes dos empreendimentos de economia solidária (EES) e identificar suas origens e tendências de desenvolvimento. Salienta as peculiaridades
Soc. estado.. Publicado em: 09/12/2019
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3. The effect of aquatic and treadmill exercise in individuals with chronic stroke
RESUMO Comparamos o efeito do treinamento de marcha em esteira versus piscina no equilíbrio e na marcha em 12 sobreviventes crônicos de AVC isquêmico separados aleatoriamente nos grupos piscina ou esteira. A escala de Berg (EEB) e timed up and go test (TUG) foram aplicados antes e após as intervenções. A EMG de superfície dos músculos do lado paréti
Fisioter. Pesqui.. Publicado em: 02/12/2019
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4. Dissipation and mass redistribution as a mechanism of propulsion in closed systems
Abstract In this work, the mechanism behind motion in closed systems is investigated by studying two simple mechanical systems. Firstly, a simple “ballistic” car system introduces the subject of propulsion as a function of a parameter that modulates the amount of ejected mass, thus allowing a transition between a closed to an open system. The second exam
Rev. Bras. Ensino Fís.. Publicado em: 01/07/2019
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5. American Space Nuclear Electric Systems
ABSTRACT: Since the 1960's the United States of America has launched several space missions using nuclear technology as a mean for propulsion and power supply. The majority of the American nuclear powered spacecrafts were based in radioisotope generators, with the exception of the SNAP-10A (1965), which was the only American reactor ever launched. However, s
J. Aerosp. Technol. Manag.. Publicado em: 01/11/2018
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6. Space Propulsion: a Survey Study About Current and Future Technologies
ABSTRACT: Current Space Launch Vehicles use chemical reactions (solid and liquid propellants) to achieve sufficient thrust to launch artifacts and humans into space. Propulsion technologies can be framed in three different categories: "escape propulsion", "in-space propulsion", and "deep space propulsion". The launch vehicles currently used for "escape propu
J. Aerosp. Technol. Manag.. Publicado em: 26/02/2018
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7. ASSEMBLY OF A REMOTELY PILOTED AIRCRAFT OF LOW COST APPLIED TO AGRICULTURE
ABSTRACT: The remotely piloted aircraft (RPA) have great applicability in agriculture. Although it is a technology that has been developed for many years, in the field of agriculture it passed unnoticed for a long time. The high cost of acquisition is still a limiting factor for small and medium-sized farmers. In this way, this study had as objective to deve
Eng. Agríc.. Publicado em: 2017-12
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8. A New Approach to Multidisciplinary Design Optimization of Solid Propulsion System Including Heat Transfer and Ablative Cooling
ABSTRACT: The optimum design of a solid propulsion system consists of optimization of various disciplines including structure, aerothermodynamics, heat transfer, and grain geometry. In this paper, an efficient model of every discipline has been developed, and a suitable framework is introduced for these hard-coupled disciplines. Hybrid optimization algorithm
J. Aerosp. Technol. Manag.. Publicado em: 2017-03
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9. Development of an Analytical Method to Predict the Behaviour of the Magnetic Field in PM Linear Motors with Halbach Array
Abstract This paper describes the application of the method of separation of variables and the use of Fourier series for solving the Laplace's and Poisson's equations on the study and analysis of the magnetic field produced in a linear motor with Halbach array. Equations for predicting the 2D magnetic flux density distribution produced in the air gap were de
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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10. Shear Properties of Carbon Fiber/Phenolic Resin Composites Heat Treated at High Temperatures
ABSTRACT Carbon fiber/phenolic resin composites have long been used as ablative materials in rocketry. Ablation is a complex multiscale problem where radiative and convective heating leads to the pyrolysis of phenolic resin matrix, resulting in the formation of a porous insulation char as thermal protection. This study investigates the shear properties evolu
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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11. Abbreviated larval development of Macrobrachium inpa Kensley and Walker, 1982 (Crustacea: Decapoda: Palaemonidae) from an Amazon Basin forest stream, Brazil, reared in the laboratory
Abstract This paper brings the description and illustrations of the abbreviated larval development of the Amazonian freshwater palaemonid shrimp, Macrobrachium inpa Kensley and Walker, 1982. The study was based on ovigerous females (mean total body length of 27.0 ± 1.64 mm) collected in a small forest stream in the Reserva Florestal Ducke, near Manaus, Braz
Nauplius. Publicado em: 11/08/2016
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12. Picosatellites for Maritime Security Applications - the Lambdasat Case
ABSTRACT: This study explores the potential deployment of small satellites for maritime interdiction and security applications by investigating the available solutions and formulating a generic proposal to optimize the use of those short-lived space assets in support of these operations. The operational background is analyzed with respect to the potential us
J. Aerosp. Technol. Manag.. Publicado em: 2015-12