Orbit
Mostrando 25-36 de 421 artigos, teses e dissertações.
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25. Status and Trends of Smallsats and Their Launch Vehicles — An Up-to-date Review
ABSTRACT This paper presents an analysis of the scenario of small satellites and its correspondent launch vehicles. The miniaturization of electronics, together with reliability and performance increase as well as reduction of cost, have allowed the use of commercials-off-the-shelf in the space industry, fostering the Smallsat use. An analysis of the launche
J. Aerosp. Technol. Manag.. Publicado em: 2017-09
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26. Novel compound heterozygous mutations of ALDH1A3 contribute to anophthalmia in a non-consanguineous Chinese family
Abstract Anophthalmia is a rare eye development anomaly resulting in absent ocular globes or tissue in the orbit since birth. Here, we investigated a newborn with bilateral anophthalmia in a Chinese family. Exome sequencing revealed that compound heterozygous mutations c.287G > A (p.(Arg96His)) and c.709G > A (p.(Gly237Arg)) of the ALDH1A3 gene were present
Genet. Mol. Biol.. Publicado em: 05/06/2017
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27. Reação da termosfera a tempestades geomagnéticas
A termosfera é uma das camadas mais externas da atmosfera terrestre, localizada entre 90-1000 km de altitude, logo abaixo da exosfera. Composta por átomos e moléculas neutras, ou partículas neutras, a termosfera é extremamente sensível à variações de energia nela depositada. Durante a ocorrência de tempestades geomagéticas, moderadas ou intensas,
Rev. Bras. Ensino Fís.. Publicado em: 02/03/2017
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28. Multi-Disciplinary System Design Optimization of a Launch Vehicle Upper-Stage
ABSTRACT: The design method presented in this paper is related to the upper-stage system and its instrumentation, expedition and facilitation so as to transfer the satellite from the destination orbit to the target orbit. We used an integrated design method with a structure based on multidisciplinary system design optimization and developed a simple systemat
J. Aerosp. Technol. Manag.. Publicado em: 2017-03
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29. Early and Delayed Effect of Functional Endoscopic Sinus Surgery on Intraocular Pressure
Abstract Introduction Due to the close anatomical relationship between the paranasal sinuses and the orbit, involvement or injury of the orbit from paranasal sinuses procedures may occur. Objectives We aimed to study the early and delayed effect of endoscopic sinus surgery on intraocular pressure ( IOP ). Methods We included in the study 38 patients wi
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-12
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30. Thermal Distortion Analysis of Inflatable Antenna Structures Considering Inflation Gas
ABSTRACT This paper addresses the static distortion and stress analysis of inflatable antenna structures subjected to a thermal load, which is a very important type of load experienced by such structures during service in orbit. Non-linear finite element analysis methods for inflatable structures were formulized, and the thermal stress of thin films was cons
J. Aerosp. Technol. Manag.. Publicado em: 2016-12
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31. Structural Differences of the Harderian Gland between Common Pheasants (Phasianus Colchicus Talischensis) and Hybrids of Italian Amber and Common Pheasants
ABSTRACT The aim of the present study was to demonstrate the histological and histochemical structure of the Harderian gland in wild and hybrid of wild and domestic birds. The samples were stained with haematoxylin-eosin, methyl green-pyronin Y, periodic acid-Schiff, alcian blue pH 2.5, aldehyde fuchsin and Hale's dialyzed iron staining's. In both species, t
Rev. Bras. Cienc. Avic.. Publicado em: 2016-06
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32. Experimental Magnetometer Calibration for Nanosatellites’ Navigation System
ABSTRACT This article deals with the problem of Earth’s magnetic field sensors calibration in the context of low-cost nanosatellites’ navigation systems. The attitude of space vehicles can be determined from the state estimation using information from three-axis inertial and non-inertial sensors. This study considers a three-axis solid-state magnetometer
J. Aerosp. Technol. Manag.. Publicado em: 2016-03
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33. Comparison of the Incident Solar Energy and Battery Storage in a 3U CubeSat Satellite for Different Orientation Scenarios
ABSTRACT In CubeSats, because the size is limited, the estimation of the incident solar energy according to the orbital parameters and satellite attitude is more critical for the design process of the electrical power system. This estimation is helpful either for sizing of the power sources and energy storage or for defining the operation modes of the CubeSa
J. Aerosp. Technol. Manag.. Publicado em: 2016-03
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34. 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
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35. Interaction Between Motions of Robotic Manipulator arms and the Non-Fixed base in On-Orbit Operations
ABSTRACT: The objective of this paper is to study the problem of the robotic manipulator operating on a non-fixed base by considering two dynamics scenarios. One in which the base is free to react in response to the robotic manipulator motion and the other in which the robotic manipulator moves its links in such a way to compensate the reaction forces on the
J. Aerosp. Technol. Manag.. Publicado em: 2015-12
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36. Regression of orbital brown tumor after surgical removal of parathyroid adenoma
Brown tumors are rare skeletal manifestations that occur in less than 2% of primary hyperparathyroidism (PHPT) cases. Even rarer is the occurrence of brown tumor of the orbit, and few cases have been reported around the world. The rare instance of this benign tumor has prompted us to report the case and treatment of an orbital brown tumor in a patient with P
Arch. Endocrinol. Metab.. Publicado em: 28/08/2015