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Search Results: 1 - 10 of 33558 matches for " Luiz Gylvan Meira Filho "
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Dynamical Donwscaling for Railroad Areas in Eastern Amazon and Southeastern Brazil: Current Climate and Near-Future Projections  [PDF]
Everaldo B. De Souza, Bergson C. de Moraes, Douglas B. S. Ferreira, Luiz Gylvan Meira Filho
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.42018
Abstract:

We performed a dynamic downscaling using REGCM4 regional model driven by MPI global model for current (1990/2012) and near-future (2015/2039) climate in order to characterize the seasonal rainfall regimes throughout the railroad areas in eastern Amazon and southeastern Brazil. The analysis of observational data for the current climate indicated the existence of pronounced spatial variations in rainfall regime across railroad regions during both the rainy and dry seasons. Although models have presented generalized underestimation, the regional model showed improvements on spatial representation and intensity of the rainfall in comparison with global model results. We reported the future projections taking into account the correction of simulated rainfall by the values of the biases found in each respective seasonal regime, so that the results are expressed by percentage changes of the future (2015/2037) relative to the current climate patterns. For the railroad in eastern Amazon, projections indicate a weak decrease of rainfall of about -15% in the rainy season (January to May), however during the dry season (June to October) are expected drastic reductions between -70% and -90% in south (Carajás in Pará state) and north (Sao Luis in Maranhao state) portions. Conversely, for the railroad in southeast Brazil, model projections point out for an increased rainfall regime during the rainy season (October to February) around +30% to +40% in the east part of the region over the Espírito Santo state.

Comparative Skill of Numerical Weather Forecasts in Eastern Amazonia  [PDF]
Bergson Cavalcanti de Moraes, Douglas Batista da Silva Ferreira, Luiz Gylvan Meira Filho, Juarez Ventura de Oliveira, Everaldo Barreiros de Souza, Pedro Pereira Ferreira Júnior, Renata Kelen Cardoso Camara, Edson José P. da Rocha, Jo?o Batista M. Ribeiro
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.33037
Abstract:

The present study evaluates the performance of three numerical weather forecasting models: Global Forecast System (GFS), Brazilian Regional Atmospheric Modelling System (BRAMS) and ETA Regional Model (ETA), by means of the Mean Error (ME) and the Root Mean Square Error (RMSE), during the most rainy four months period (January to April 2012) on Eastern Amazonia. The models displayed errors of superestimation and underestimation with respect to the observed precipitation, mainly over center-north of Pará and all of Amapá, where the precipitation is higher. Among the analyzed models, GFS shows the best performance, except during January and March, when the model to underestimated precipitation, possibly due to the anomalously high values recorded.

Tratamento do canal arterial persistente em neonatos prematuros: análise de 18 casos
Ciongoli, Wagner;Fiorelli, Alfredo I;Gaioto, Fábio A;Busnardo, Fábio F;Cruz, Luiz N. F;Meira, Enoch B. S;Bittar, Roberto;Daniel Filho, Durval Anibal;
Revista Brasileira de Cirurgia Cardiovascular , 1993, DOI: 10.1590/S0102-76381993000400006
Abstract: the purpose of our study was to analyse the results obtained in 18 neonate premature patients who underwent surgical closure of the patent ductus arteriosus, between july 1990 and december 1993 (42 months). twelve (66.6%) patients were female, with age between 10 and 44 (20.8±8.3) days, gestacional age ranged from 26 to 28 (27.2±0.9) weeks. in the surgery day the birth weight was between 700 and 1380 (985.8 ±181.6) grams. acute respiratory insufficiency was present in all patients, as the principal surgical indication. in six (33.3%) patients congestive cardiac insufficiency was present. the pharmacological treatment with indometacin, before the operation, was used in nine (50%) patients without success, and although have had no influence in the postoperative results, was associated with a significant reduction of the urine debit (p<0.001). the operative procedure to perform the ligation of the ductus arteriosus, was the fixation of three to four metallic clips, and it has proved to be easily praticable. the preoperative ecocardiography investigation was realized in 15 (83.2%) patients, showing an increase in the relationship between the left atrium and the aortic diameter in all the patients. this relationship was increased in only four (22.2%) patients 30 days after the operation, and only in one (5.5%) patient four months after the operation, showing a tendency of normalization of the cardiac function. in one (5.5%) patient there was a reopening of the ductus in immediate postoperative period, beeing submitted to a reoperation for the ligation of the ductus arteriosus. there was no significant difference in the period of orotraqueal intubation (p=0.586) as well as in the period with oxigen inspiratory fraction < 40% and > 40% < 60% in the pre and postoperative time, (p=0.841 and p=0.692, concerning), but with significant reduction in the period with oxigen inspiratory fraction > 60% (p=0.033). the period of hospitalization was comprehended between 43 and 157 (96.
Estudo da técnica da sindesmoplastia extra-articular com fascia lata autógena: modelo em c?es
Ferreira, Manoel Luiz;Schanaider, Alberto;Silva, Paulo César;Abreu, Ant?nio Victor de;Costa, Andrei Ferreira Nicolau;Braga, Jalene Meira;Rousso Filho, Raul;Pereira, Lara de Paula M.;
Revista do Colégio Brasileiro de Cirurgi?es , 2009, DOI: 10.1590/S0100-69912009000200014
Abstract: objetive: to evaluate extra-capsular technique for the treatment of the anterior cruciate ligament rupture, in dogs. methods: it was performed an extra-articulate surgery without arthrotomy of the anterior cruciate ligament by using a strip of the autogenous fascia lata for stabilization of the knee joint in six animals which had severe claudication and drawer movement sign positive. results: the extra articulate technique was effective with good knee stabilization and satisfactory outcome. conclusion: the use of the fascia lata with an extra capsular technique to fix the rupture of the anterior cruciate ligament seems to be useful once it is a simple and rapid procedure with minimum tissue damage and efficient postoperative recovery.
Energy Balance in a Patch of the Atlantic Forest in São Paulo City, Brazil  [PDF]
Frederico Luiz Funari, Augusto José Pereira Filho
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.69076
Abstract:

The aim of this work was to characterize and to bring into relationship of the net radiation with the latent heat flux equivalent to water (mm) in a patch of Atlantic Forest within the metropolitan area of Sao Paulo (RMSP). The estimation of the latent heat flux (LE) was made by the energy balance equation with the Bowen ratio. Measurements of net radiation and psychometrics gradients were made. Soil heat flux (G) was measured by temperature sensors in two depths. Measurements were made at Park of Science and Technology of Sao Paulo University (CIENTEC), Sao Paulo, Brazil, between 2011 and 2013. Results indicated that evapotranspiration varies seasonally and the amount of water evaporated exceeds 3.0 mm·day-1 in spring/summer and in autumn/winter the amount is approximately 1.0 mm·day-1. The evapotranspiration is increased under RMSP urban climate conditions with higher air temperature and lower moisture especially in summer season.

Description of a new species, Pintomyia dissimilis nov. sp., a phlebotomine fossil from Dominican Republic amber (Diptera: Psychodidae: Phlebotominae)
José Filho, Paula Serra e Meira, Cristiani Sanguinette, Reginaldo Brazil
Parasites & Vectors , 2009, DOI: 10.1186/1756-3305-2-25
Abstract: This paper describes a new fossil species of phlebotomine sandfly from amber found in Dominican Republic. This new species is based on morphological characters of a male such as 5° palpomere longer than 3° + 4°, three well-developed spines in the gonostyle, lateral lobe longer than gonocoxite and permit inclusion of the new species in the genus Pintomyia, series serrana. The paramere, with a curvature in the ventral margin, of the middle of the structure, separates the new species from the others fossils or extant species.The new species described in the present study named Pintomyia dissimilis nov. sp. is well differenciated from all known species in this genus.Several tropical diseases are transmitted by insects and among them is included the leishmaniases, a group of diseases which the aethiological agents are species of parasite of the genus Leishmania. Phlebotominae sandflies are responsible for the transmission among vertebrate hosts. Transmission occurs during blood feeding of females and, up to now, around 30 species are known to be involved in the transmission of the disease [1].This host/parasite is very old being recorded in the Cretaceous and Miocene periods, where extinct sandflies in amber have been found to be associated with protozoa described as belonging to the genus Paleoleishmania [2,3]. This last record is related to amber of the Dominican Republic in the Hispaniola Island, Caribbean region of Central America.To date, in the New World, fifteen species of fossil sandflies had been formally described and most are from the Dominican Republic and only one from Mexico. All the species are within the genera Pintomyia Costa Lima, 1932; Micropygomyia Barretto, 1962; and Psathyromyia Barretto, 1962 [4,5].The objective of this study was to carry out a description of one species of phlebotomine sandflies from the Dominican Republic, based on a holotype male, enclosed in amber.The description of the fossil species was based on direct observation under the o
Scalar source in circular motion interacting with massive klein-gordon field in Minkowski spacetime
Crispino, Luís C. B.;Meira Filho, Dami?o P.;
Brazilian Journal of Physics , 2005, DOI: 10.1590/S0103-97332005000700018
Abstract: we analyze the scalar radiation emitted by a source in uniform circular motion in minkowski spacetime interacting with a massive klein-gordon field. we assume the source rotating around a central object due to a newtonian force. by considering the canonical quantization of this field, we use perturbation theory to compute the radiation emitted at the tree level. regarding the initial state of the field as being the minkowski vacuum, we compute the emission amplitude for the rotating source, assuming it as being minimally coupled to the massive klein-gordon field. we then compute the power emitted by the swirling source as a function of its angular velocity, as measured by asymptotic static observers.
Viability of use of PVC tubes in solar collectors: an analysis of materials
Souza, Luiz Guillherme Meira de;Gomes, Uílame Umbelino;
Materials Research , 2003, DOI: 10.1590/S1516-14392003000200019
Abstract: this paper presents a study of the inherent degradations of pvc tubes due to the thermal effect and ultraviolet solar radiation. the approach relates its causes and its effect of use of the pvc tubes as elements to absorption, forming a coil, in solar collectors for water heating. it is demonstrated that such degradations can be burst through the use of an outflow and an appropriate regimen of work, as well as of a protective layer for the tubes, in this case black ink used to magnify its absorption. the results of the properties of tubes that had been exposed to the degradation effect for up to five years are presented. the viability of use of this type of collector is demonstrated through comparative analysis of tubes exposed and not exposed to the sun, concluding for the low cost, easy assembly and maintenance of the system.
Viability of use of PVC tubes in solar collectors: an analysis of materials
Souza Luiz Guillherme Meira de,Gomes Uílame Umbelino
Materials Research , 2003,
Abstract: This paper presents a study of the inherent degradations of PVC tubes due to the thermal effect and ultraviolet solar radiation. The approach relates its causes and its effect of use of the PVC tubes as elements to absorption, forming a coil, in solar collectors for water heating. It is demonstrated that such degradations can be burst through the use of an outflow and an appropriate regimen of work, as well as of a protective layer for the tubes, in this case black ink used to magnify its absorption. The results of the properties of tubes that had been exposed to the degradation effect for up to five years are presented. The viability of use of this type of collector is demonstrated through comparative analysis of tubes exposed and not exposed to the sun, concluding for the low cost, easy assembly and maintenance of the system.
GIS as a Decision Support Tool in the Area of Influence of the Nuclear Complex Angra dos Reis, Brazil  [PDF]
Corbiniano Silva, Luiz Landau, Luiz Claudio Gomes Pimentel, Paulo Fernando Lavalle Heilbron Filho
Journal of Geographic Information System (JGIS) , 2013, DOI: 10.4236/jgis.2013.51002
Abstract:

The outlook concerning the occurrence of industrial accidents has led to the implementation of response systems based on geoprocessing tools, which are widely adopted in emergency for such ventures, since they have helped and served as a support for decision making, as well as for the preparation of guidelines aimed at managing emergencies. Nuclear power plants, because they constitute types of industrial activities that present dangerous conditions and attention regarding security are characterized as hazardous, especially due to consequences that occurred from large accidents— such as Chernobyl (1986) and Fukushima (2011)—highlighting the importance to its negative impacts, since the occurrence of accidents at nuclear power plants may affect surrounding areas, thus exposing a set of elements that are part of the environmental dynamics that integrates the catchment area where this type of plant is situated. In this way, through an integrated view of the region where the nuclear complex is located in Angra dos Reis City (Rio de Janeiro State) and, also, by aggregating information that portray the geobiophysical reality of its surroundings, several elements were incorporated into a database developed in a virtual environment, in which was produced a geographic information system (GIS) that presents a complex of variables that, once considered, can enhance various analysis in order to support emergency situations and planning, as well as guidelines that help define actions from the occurrence of accidental events at the nuclear plant.

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