12 documents found, page 1 of 2
A importância da Formação de Coimbra no contexto dos sistemas petrolíferos da B...
Sousa, João; Duarte, Luis; Sêco, SérgioRESUMO: Baseado na Resumo: Baseado na análise de 19 sondagens onshore e offshore na margem ocidental da Bacia Lusitânica (Portugal), é apresentada a caracterização do potencial petrolífero da Formação (Fm) de Coimbra, uma unidade carbonatada de idade sinemuriana (Jurássico Inferior). O bom reconhecimento estratigráfico, sedimentológico e geoquímico, em conjunto com a análise de logs de gamma ray permite evidenc...
Heterogeneity of the mixed siliciclastic-carbonate deposits of the upper Cabo C...
Barata, Joao; Duarte, Luis; Azerêdo, Ana Cristina; Gomes, J.ABSTRACT: The upper CC5 member of the Cabo Carvoeiro Formation (Toarcian-Aalenian(?)) of the Lusitanian Basin is characterized by grainstone facies with quartz grains, ooids and intraclasts. These facies are observed exclusively at Peniche, contrasting with the hemipelagic marly sediments of coeval outcrop sections in the basin. A detailed facies scheme reveals the relative local heterogeneity of the succession...
Aspetos microfaciológicos da formação da Leba, Proterozoico (Sudoeste de Angola)
Duarte, Luis; Barata, Joao; Oliveira, C. L.RESUMO: A Formação da Leba é uma unidade carbonatada de referência do Proterozoico do Cratão do Congo, Sudoeste de Angola, composta por dolomitos silicificados com laminitos microbianos e estromatólitos. Este trabalho preliminar descreve as principais microfácies que caracterizam esta unidade, baseada no estudo de várias secções do Planalto da Humpata. Os resultados confirmam o domínio da dolomite em toda a suc...
Reavaliação estratigráfica da Formação de Coimbra (Sinemuriano) através de dado...
Sousa, João; Duarte, Luis; Sêco, SérgioRESUMO: Os dados litostratigráficos de subsuperfície da Bacia Lusitânica apresentam uma grosseira resolução e interpretação, sendo a conceptualização da evolução da bacia substanciada principalmente por afloramento. A espectrometria de radiação gama tem demonstrado ser uma grande utilidade na correlação entre unidades geológicas em afloramento e subsuperfície, reconhecimento de fácies margosas ricas em matéria ...
The Early and Middle Jurassic palynostratigraphy of the Lusitanian Basin (Portu...
Correia, Vânia; Pereira, Zélia; Riding, James; Duarte, Luis; Henriques, Maria Helena; Fernandes, PauloABSTRACT: Palynomorphs, especially dinoflagellate cysts, are important biostratigraphical and palaeoenvironmental tools and their study can be applied to the Lusitanian Basin of Portugal. A palynostratigraphical high-resolution survey was undertaken in eight Lower and Middle Jurassic (upper Sinemurian to lowermost Bathonian) sections from the Lusitanian Basin. We present the resulting biostratigraphical scheme ...
Fringing Field Capacitive Smart Sensor Based on PCB Technology for Measuring Wa...
Morais, Flavio [UNESP]; Carvalhaes-Dias, Pedro; Duarte, Luis; Costa, Eduardo; Ferreira, Alexandre; Dias, Jose SiqueiraMade available in DSpace on 2020-12-10T19:54:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-03-04; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); We present a capacitive smart sensor based on printed circuit board (PCB) technology to measure the amount of water content in a paper pulp at the wet end of a paper machine. The developed sensor incorporates in the same PCB the signal...
Optimization of the TEGs Configuration (Series/Parallel) in Energy Harvesting S...
Morais, Flavio [UNESP]; Carvalhaes-Dias, Pedro; Duarte, Luis; Spengler, Anderson; Paiva, Kleber de; Martins, Thiago; Cabot, Andreu; Dias, Jose SiqueiraMade available in DSpace on 2020-12-10T20:00:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-05-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Graduate Program in Electrical Engineering, Federal University of Santa Catarina; Solar radiation and human activity generate ubiquitous temperature gradients that could be harvested by thermoelectric generators (TEGs). However, most o...
STDCC radar at 24 GHz: first measurement trials
Ferreira Sardo, Andre; Reis, João R.; Duarte, Luis; Leonor, Nuno; Ribeiro, Carlos; Caldeirinha, Rafael F. S.This paper presents the first measurement trials for performance assessment of a real-time and high resolution monostatic radar operating at 24 GHz. The proposed real-time radar, which operates based on the sliding correlation of pseudo-noise (PN) sequences, provides a high time resolution better than 4 ns, useful for moving target identification (MTI) in the presence of highly dense clutter, under harsh enviro...
Disruptive Future of Radar Based on All-Digital PN Signal Processing
Ribeiro, Carlos; Ferreira Gil, João; Caldeirinha, Rafael; Reis, Joao R.; Sardo, Andre; Duarte, Luis; Leonor, NunoThis paper presents the first results on the design and implementation of a real-time and high resolution monostatic radar at 24 GHz, based on the sliding correlation of pseudonoise (PN) sequences. The real-time radar, with a high time resolution better than 4ns, is used for moving target identification (MTI) in the presence of highly dense clutter, under harsh environments and severe weather conditions (fog, s...
A Software-Defined Radio for Future Wireless Communication Systems at 60 GHz
Gomes, Rodolfo; Duarte, Luis; Ribeiro, Carlos; Caldeirinha, RafaelThis paper reports on a complete end-to-end 5G mmWave testbed fully reconfigurable based on a FPGA architecture. The proposed system is composed of a baseband/low-IF processing unit, and a mmWave RF front-end at both TX/RX ends. In particular, the baseband unit design is based on a typical agile digital IF architecture, enabling on-the-fly modulations up to 256-QAM. The real-time 5G mmWave testbed, herein prese...