Orbit
Mostrando 1-12 de 421 artigos, teses e dissertações.
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1. Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands
In this work, the emission properties of fac-[Re(CO)3(NN)(py)]+, NN = 1,10-phenanthroline (phen), dipyrido[3,2-f:2’,3’-h]quinoxaline (dpq) and dipyrido[3,2-a:2’3’-c]phenazine (dppz); py = pyridine were investigated in different temperatures, ranging from 80 to 300 K, and in different solvent mixtures and in polymethyl methacrylate. The changes observ
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Assessment of Total Attenuation and Adaptive Scheme for Quality of Service Enhancement in Tropical Weather for Satellite Networks and 5G Applications in Nigeria
Abstract The dynamic weather condition is a major concern for optimum channel utilization in recent times, especially at higher frequencies with larger bandwidth for 5G applications. Over the years, rain-induced attenuation among the hydrometeors has been linked as the major cause of signal impairment especially at the frequency, f ≥ 10 GHz. However, when
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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3. NOVAS TECNOLOGIAS PARA O TRATAMENTO DA TUBERCULOSE: O QUE AS PATENTES NOS DIZEM
Tuberculosis still is the world’s leading cause of death from a single infectious agent and has affected approximately 10 million people in 2018. The development of new technologies for treating tuberculosis is among the priority goals for the global fight against the disease. The present work makes a technological prospecting from patent documents, aiming
Quím. Nova. Publicado em: 20/07/2020
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4. Computed tomography based analysis of the lamina papyracea variations and morphology of the orbit concerning endoscopic surgical approaches
Resumo Introdução: A avaliação radiológica é mandatória para avaliar o tipo de abordagem endoscópica no tratamento cirúrgico de doença nasossinusal e na reconstrução de fraturas antes de quaisquer modalidades de tratamento relacionadas à parede medial orbital. Objetivo: O objetivo foi proporcionar uma melhor compreensão das variações da lâ
Braz. j. otorhinolaryngol.. Publicado em: 07/11/2019
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5. A NOVEL MODEL FOR ORIENTATION OF LINEAR OPTICAL SATELLITE IMAGES BASED IN THE ADAPTATION OF THE ORBIT-ATTITUDE MODEL
Abstract In this paper a novel model to orient a pushbroom linear optical satellite image is proposed. This one is based in the adaptation of the Orbit-Attitude model for use of the Modified UCL Kepler platform model. It has only the components of satellite position and velocity as unknowns. This implies not only the reduction of unknowns but also the elimin
Bol. Ciênc. Geod.. Publicado em: 14/10/2019
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6. Single-Bus and Dual-Bus Architectures of Electrical Power Systems for Small Spacecraft
ABSTRACT Nowadays, it has become possible for universities and new businesses to launch satellites of reduced size and cost fulfilling viable missions. Nevertheless, there is still a considerable failure rate that reduces the expected lifetime of these spacecraft. One of the main causes of failure is the power system. Redundancy is one of the main options to
J. Aerosp. Technol. Manag.. Publicado em: 10/10/2019
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7. A Precise Algorithm for Computing Sun Position on a Satellite
ABSTRACT: To meet the high precision sun tracking needs of a space deployable membrane solar concentrator and other equipment, an existing algorithm for accurately computing the sun position is improved. Firstly, compared with other theories, the VSOP (variation seculaires des orbits planetaires) 87 theory is selected and adopted to obtain the sun position i
J. Aerosp. Technol. Manag.. Publicado em: 26/08/2019
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8. Na cidade em disputa, produção de cotidiano, território e conflito por ocupações de moradia
Resumo Este artigo examina, a partir de pesquisa etnográfica, dinâmicas urbanas e políticas articuladas e produzidas por uma ocupação de moradia, mantida por movimentos organizados, no centro de São Paulo. A análise dá-se em torno de três eixos: cotidiano, território e conflito. A observação do cotidiano permite a compreensão de uma ocupação c
Cad. Metrop.. Publicado em: 15/08/2019
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9. Exílio e afastamento: considerações sobre uma hermenêutica da distância?
Resumo: Este texto apresenta os trabalhos publicados no dossiê “Exílio e afastamento: considerações sobre uma hermenêutica da distância”, e, para tal, propõe uma reflexão sobre a categoria de exílio. A história do século XX, atravessada por crises, produziu massivamente populações de deslocados, sujeitos instáveis em um tempo de mudanças c
Tempo. Publicado em: 15/07/2019
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10. REAL TIME PPP APPLIED TO AIRPLANE FLIGTHT TESTS
Abstract The availability in real time of GNSS satellites orbits, clock corrections and code and phase biases provided the possibility of application of Real Time Precise Point Positioning (RTPPP). This paper presents the methodology concerning RTPPP and application to kinematic trajectories of airplane flight tests, but without using the carrier phase bias.
Bol. Ciênc. Geod.. Publicado em: 10/07/2019
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11. Giant frontal lipoma mimicking frontal mucocele
RESUMO O lipoma é um tumor do tecido adiposo de caráter benigno, usualmente indolor, porém que pode gerar compressão de estruturas adjacentes, dependendo da sua localização. A mucocele consiste em uma lesão cística de caráter benigno, na região fronto-etmoidal, devido à obstrução crônica dos óstios dos seios paranasais e consequente processo i
Rev. bras.oftalmol.. Publicado em: 01/07/2019
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12. Statistics of South Delta-Aquariids (SDA) meteor showers registered at UNIVAP in 2017 and 2018
Abstract Meteor showers, seen at regular and frequent intervals, occur when the Earth crosses the orbit of a comet and many small dust particles enter the Earth's atmosphere. In this paper we compare the Southern Delta-Aquariids (SDA) shower recorded by the UVP1 and UVP2 meteor monitoring stations in the Southeastern of Brazil, in 2017 and 2018. These statio
Rev. Bras. Ensino Fís.. Publicado em: 01/07/2019