Zobrazeno 1 - 10 of 21 pro vyhledávání: '"F. J. Oliveira"'
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Akademický článek
Spatial Diversity Effect on the Experimental Gain of Capacity of the Outdoor Mobile Radio Channel in the 700 MHz Band
Autor: P. A. Pinna, A. L. Santos, L. J. Matos, P. V. G. Castellanos, F. J. Oliveira, G. L. Siqueira
Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 19, Iss 2, Pp 191-202
Abstract From measurements performed in the 700 MHz band, this paper analyzes the effect of spatial diversity on the channel capacity through the propagation of an OFDM mobile radio signal and compares with the results of a single branch providing wh
Externí odkaz: https://doaj.org/article/6bed368d2c72464090fce722df1b3266
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3
The Principle of Equivalence: Periastron Precession, Light Deflection, Binary Star Decay, Graviton Temperature, Dark Matter, Dark Energy and Galaxy Rotation Curves
Autor: F. J. Oliveira
Publikováno v: Journal of High Energy Physics, Gravitation and Cosmology. :661-679
The nature of the principle of equivalence is explored. The path of gravitons is analyzed in an accelerating system equivalent to a gravitating system. The finite speed of the graviton results in a delay of the gravitational interaction with a partic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ffea5c034f1a7fc4a5824130d9bce3b
https://doi.org/10.4236/jhepgc.2021.72038
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4
Spatial Diversity Effect on the Experimental Gain of Capacity of the Outdoor Mobile Radio Channel in the 700 MHz Band
Autor: Leni J. Matos, Gláucio Lima Siqueira, P. A. Pinna, F. J. Oliveira, A. L. Santos, P. V. G. Castellanos
Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.19 n.2 2020
Journal of Microwaves. Optoelectronics and Electromagnetic Applications
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)
instacron:SBMO
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 19, Iss 2, Pp 191-202
From measurements performed in the 700 MHz band, this paper analyzes the effect of spatial diversity on the channel capacity through the propagation of an OFDM mobile radio signal and compares with the results of a single branch providing what improv
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b109896f98c1c468c22b875e77c010d
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742020000200191
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5
Channel Characterization on Vehicle to Infrastructure Scenarios in 5.8 GHz
Autor: F. J. Oliveira, Leni J. Matos, L. A. R. Silva Mello, P. V. G. Castellanos, W. D. T. Meza
Publikováno v: 2018 IEEE MTT-S Latin America Microwave Conference (LAMC 2018).
This paper deals with the narrowband and wideband characterization of a vehicle-to-infrastructure channel at 5.8 GHz frequency for short distances. Measurements were carried out in Niteroi, Rio de Janeiro, Brazil and the data were processed in order
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::31de831db5df7931e9cfbac962621e42
https://doi.org/10.1109/lamc.2018.8699053
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6
Interacción químico entre nitruros de silicio y aleaciones de acero
Autor: J. M. Vieira, R. F. Silva, F. J. Oliveira
Publikováno v: Boletín de la Sociedad Española de Cerámica y Vidrio. 39:711-715
Los experimentos de difusion metal/ceramica permiten estudiar mecanismos de union y analizar el efecto de la composicion del metal en el desgaste quimico de herramientas de corte ceramicas. En este trabajo se investigo la cinetica de reaccion en pare
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d12a1584ab34832dac78efa94234de79
https://doi.org/10.3989/cyv.2000.v39.i6.770
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8
Adhesion and wear behaviour of NCD coatings on Si3N4 by micro-abrasion tests
Autor: F G, Silva, M A, Neto, A J S, Fernandes, F M, Costa, F J, Oliveira, R F, Silva
Publikováno v: Journal of nanoscience and nanotechnology. 9(6)
Nanocrystalline diamond (NCD) coatings offer an excellent alternative for tribological applications, preserving most of the intrinsic mechanical properties of polycrystalline CVD diamond and adding to it an extreme surface smoothness. Silicon nitride
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::bc76ec3d19d687a42984bfd8fbede3f6
https://pubmed.ncbi.nlm.nih.gov/19504945
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9
Total gastrectomy for gastric adenocarcinoma. Analysis of 115 consecutive patients
Autor: F J, Oliveira, H, Ferrao, E, Furtado, H, Batista, M S, Santos
Publikováno v: Hepato-gastroenterology. 46(27)
There was a tendency to use more extensive operations for the treatment of gastric cancer during the last decade particularly in Europe. This retrospective study was carried out to review our recent experience with total gastrectomy for gastric adeno
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::d711139414724a5539f107a70d5b5e68
https://pubmed.ncbi.nlm.nih.gov/10430395
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10
Total gastrectomy for gastric cancer in elderly patients
Autor: F J, Oliveira, E, Furtado, H, Ferrao, L, Conceicao, H, Baptista
Publikováno v: Hepato-gastroenterology. 46(25)
The increased average life expectancy and the changing patterns in gastric carcinoma have resulted in a considerable rise in the number of older patients requiring total gastrectomy. Results of total gastrectomy for gastric cancer in elderly patients
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::30ec3682d4fcbf8b2b522c06a45c1016
https://pubmed.ncbi.nlm.nih.gov/10228870
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