Space Applications
Mostrando 13-24 de 271 artigos, teses e dissertações.
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13. Collaborative e-Health Environments: The enhanced role of health agents
Resumo A literatura tem discutido o impacto das Tecnologias de Informação e Comunicação na promoção da saúde, na educação em saúde e nas aplicações para se promover a mudança nos comportamentos em relação a isso. O objetivo deste artigo é descrever as propriedades da Web 2.0 que devem convergir para uma plataforma de colaboração peer-to-pee
Transinformação. Publicado em: 07/02/2019
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14. Multiobjective and Multicase Optimization of a Spacecraft Radiator
ABSTRACT Optimization is now an established tool for obtaining better solutions in engineering design. Nevertheless, the multiplicity of possible applications and the continuing search for better computational performance has motivated researchers in continuing to propose new methods, as well as improvements on existing ones. Not only optimization has allowe
J. Aerosp. Technol. Manag.. Publicado em: 07/01/2019
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15. A New Buffer in Impact Reduction for Aerospace Applications
Abstract The aim of this paper is to introduce a new buffering mechanism in impact reduction during assembly process of two space vehicles. Probe-cone mechanism, due to its computational easiness, is employed to study impact interaction between multibody systems. The proposed buffer with a compact structure includes a probe equipped with axial and torsional
Lat. Am. j. solids struct.. Publicado em: 14/06/2018
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16. Mini-channel Two Phase Flow of Hydrogen Peroxide: Decomposition with Silver Catalyst
ABSTRACT Hydrogen peroxide is a chemical compound which is commonly used as a disinfectant at lower concentrations. The chemical is called as a green propellant for space applications. Water and oxygen are the products after self-decomposition of the compound at higher concentrations. The reaction rate at lower concentrations can be enhanced by using catalys
J. Aerosp. Technol. Manag.. Publicado em: 14/06/2018
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17. Modeling the creep behavior of GRFP truss structures with Positional Finite Element Method
Abstract This paper presents the development of a formulation, based on Positional Finite Element Method, to describe the viscoelastic mechanical behavior of space trusses. The numerical method used was chosen due to its efficiency in the applications concerning nonlinear numerical analyses. The formulation describes the positional variation over time under
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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18. Effect of Loose Bonding and Corrugated Boundary Surface on Propagation of Rayleigh-Type Wave
Abstract The problems concerns to the propagation of surface wave propagation through various anisotropic mediums with initial stress and irregular boundaries are of great interest to seismologists, due to their applications towards the stability of the medium. The present paper deals with the propagation of Rayleigh-type wave in a corrugated fibre-reinforc
Lat. Am. j. solids struct.. Publicado em: 23/04/2018
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19. FOTOELETROCATÁLISE EM SEMICONDUTORES: DOS PRINCÍPIOS BÁSICOS ATÉ SUA CONFORMAÇÃO À NANOESCALA
The science of semiconductors, essential in electronics, is pivotal also for the most active research fields of environmental science and engineering today - the development of solar energy conversions and advanced oxidation processes, exemplified by the harvesting of sun daylight to produce electric energy, environmentally friendly fuels and to clean up wat
Quím. Nova. Publicado em: 2018-03
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20. GPS Jamming Signals Propagation in Free-Space, Urban and Suburban Environments
ABSTRACT: GPS-based systems have been widely used in different critical sectors, including civilian, military and commercial applications. Despite of being able to provide great benefits, under certain circumstances they show to be highly vulnerable to intentional interferences. In this context, this article aimed to evaluate the vulnerability range of this
J. Aerosp. Technol. Manag.. Publicado em: 26/02/2018
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21. ORGANOFILIZAÇÃO E SILANIZAÇÃO DE ARGILA BENTONITA
Clays have been used in several technological areas. One of the most usual applications is their incorporation into organic materials. Nonetheless, natural clays are hydrophobic being incompatible with organic medium. Clay organophilization can be reached by several methods such as by exchange of the interlayer sodium cations by organic cations, and by silan
Quím. Nova. Publicado em: 2018-02
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22. Susceptibility of GPS-Dependent Complex Systems to Spoofing
ABSTRACT GPS-based systems have been widely used in different critical sectors, including civilian and military applications. Despite of being able to provide great benefits, under certain circumstances they show to be highly vulnerable to intentional interferences. In this context, this article aimed to evaluate the susceptibility of different complex GPS-d
J. Aerosp. Technol. Manag.. Publicado em: 15/01/2018
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23. Populational brain models of diffusion tensor imaging for statistical analysis: a complementary information in common space
Abstract Introduction: The search for human brain templates has been progressing in the past decades and in order to understand disease patterns a need for a standard diffusion tensor imaging (DTI) dataset was raised. For this purposes, some DTI templates were developed which assist group analysis studies. In this study, complementary information to the most
Res. Biomed. Eng.. Publicado em: 24/08/2017
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24. Numerical Simulations to Assess ART and MART Performance for Ionospheric Tomography of Chapman Profiles
ABSTRACT The incomplete geometrical coverage of the Global Navigation Satellite System (GNSS) makes the ionospheric tomographic system an ill-conditioned problem for ionospheric imaging. In order to detect the principal limitations of the ill-conditioned tomographic solutions, numerical simulations of the ionosphere are under constant investigation. In this
An. Acad. Bras. Ciênc.. Publicado em: 31/07/2017