18,908 research outputs found
Introdução e avaliação de cultivares e porta-enxertos de citros em Rio Branco-AC.
No full textO presente estudo tem como objetivo avaliar o desempenho de 17 cultivares e 4 porta-enxertos de citros, nas condições edafoclimáticas de Rio Branco-AC
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
Potamotrygon marquesi Silva & Loboda 2019
No full textPotamotrygon marquesi Silva & Loboda, 2019 Holotype: MZUSP 117790; adult female, 226 mm DW (approximately the same DW as cited in Silva & Loboda, 2019); (Fig. 14); Rio Tarauacá, municipality of Tarauacá, Acre State, Brazil, 8º4’5.88”S, 70º43’4.8”W; depth not listed; F. P. L. Marques et al.; July 2006. Notes: Ventral skin removed. Right lateral line canals with black ink dots for drawings on original publications. Field no. AC 06-106. Paratypes: MZUSP 117787: AC 06-95; one adult male, 216 mm DW (approximately the same DW as cited in Silva & Loboda, 2019); Rio Tarauacá, municipality of Tarauacá, Acre State, Brazil, 8º4’5.88”S, 70º43’4.8”W; depth not listed; F.P.L. Marques et al.; July 2006. Notes: Cut between gill openings. Cut on right portion abdomen. MZUSP 117795: AC 06-92; one adult male, 207 mm DW (approximately the same DW as cited in Silva & Loboda, 2019); Rio Tarauacá, municipality of Tarauacá, Acre State, Brazil, 8º4’5.88”S, 70º43’4.8”W; depth: not listed; Collection date: F. P. L. Marques et al.; July 2006. Notes: Cut between gill openings; cut on right portion of abdomen. MZUSP 117798: AC 06-107; one adult female, 244 mm DW (approximately the same DW as cited in Silva & Loboda, 2019); Rio Tarauacá, municipality of Tarauacá, Acre State, Brazil, 8º4’5.88”S, 70º43’4.8”W; depth not listed; F. P. L. Marques et al.; July 2006. Notes: Cut on right portion of abdomen.Published as part of Lima, Arthur De, Loboda, Thiago Silva, Gianeti, Michel Donato, Silva, João Paulo Capretz Batista Da & Pinna, Mario De, 2023, Type specimens of Elasmobranchii in the Museu de Zoologia da Universidade de São Paulo (MZUSP), pp. 301-332 in Zootaxa 5296 (3) on page 318, DOI: 10.11646/zootaxa.5296.3.1, http://zenodo.org/record/798382
Influence of ac ageing on space charge dynamics in LDPE
No full textPolymeric materials have been widely used as insulation in power industry due to their excellent electrical properties. However, these properties deteriorate in time irreversibly when the material is subjected to electric stress. Although space charge is believed to play an important role in ac ageing, exact mechanisms are poorly understood due to very limited experimental data. In the present work efforts have been made to investigate the influence of ac ageing on space charge dynamics in low-density polyethylene (LDPE). LDPE films with 200mm were aged at 50 kV/mm at 50 Hz for various times at ambient temperature. Space charge dynamics in the samples prior to and after ageing were monitored using the pulsed electroacoustic (PEA) technique under dc electric stress. The results indicate that there is a significant amount of homocharge accumulation in the unaged sample due to charge injection. These injected charges are the captured by the deep traps originated from the interface between crystalline and amorphous regions in LDPE. Ageing under ac condition does not necessarily lead to an increase in amount of charge in the bulk but leads to an increase in mobility of charge carriers. Chemical analysis by infrared spectroscope (FTIR) reveals there are chemical changes taken place in the bulk of the material after ac ageing. It is believed that the chemical changes introduce shallow traps which promote the movement of charge carriers in the bulk. Consequently, the injected charges spread across the sample
AC-413 relief road in A Silva.
No full textLa carretera AC-413 es una carretera que forma parte de la Red Primaria Complementaria de la Xunta de Galicia y une los núcleos de Ordes y Carballo. A su paso por A Silva, interseca con la carretera AC-400 que también forma parte de la red Primaria Complementaria de la Xunta de Galicia. Las condiciones viarias existentes en A Silva, generan la necesidad de una solución que permita mejorar las características de circulación en la zona en cuestión y así, obtener un beneficio social para los usuarios de la vía y los propios habitantes de la zona. En el Plan de Mobilidade e Ordenación Viaria Estratéxica se presentan diversas actuaciones entre las que se encuentra una variante en A Silva. Este anteproyecto, desarrolla la realización de esta variante. Las principales características del presente anteproyecto son las que se presentan a continuación: -Se ha realizado un estudio de la problemática existente para posteriormente, determinar tres alternativas que resuelven el objetivo determinado teniendo en cuenta los diferentes condicionantes propios de la zona. -Se determina la alternativa más adecuada mediante tres métodos de análisis multicriterio para asegurar la elección óptima en función de unos criterios previamente definidos. -Se definen las características propias del trazado seleccionado, asegurando el cumplimiento de la normativa vigente. -Se realiza una estimación presupuestaria del coste que supone la ejecución de la obra en cuestión.Traballo fin de grao (UDC.ETSECCP). Tecnoloxía da Enxeñaría Civil. Curso 2014/201
A power sharing series power BJT array with isolated low voltage control for AC power control applications
No full textA technique for a continuously variable AC resistance using a series BJT array is presented. This array provides high power dissipation capability and uniform voltage and power distribution across the individual transistors. The array, controlled using a set of optoisolators to maintain the electrical isolation between the control circuits and the power stage, could be used as the basis to develop several useful techniques including a solid state AC regulator with comparable performance to the commonly used ferro-resonant systems; a linear AC electronic load suitable for testing UPS and other power conditioners; and, in other AC power control applications such as switching capacitors in AC resonant circuits
Recomendações para o enraizamento de estacas de acerola (Malpiguia glabra L.) nas condições climáticas de Rio Branco-Acre.
No full textCom o objetivo de se avaliar métodos alternativos para a produção de mudas de acerola, nas condições climáticas de Rio Branco-AC, o Centro de Pesquisa Agroflorestal do Acre (CPAF-Acre) desenvolveu estudos sobre o desempenho da espécie quanto ao enraizamento de estacas, em função da posição de retirada das mesmas no ramo
Avaliação preliminar de métodos de enxertia e porta-enxertos para a gravioleira em Rio Branco, Acre.
No full textEste trabalho tem como objetivo avaliar quatro métodos de enxertia e três porta-enxertos para a gravioleira nas condições edafoclimáticas de Rio Branco, AC
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