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Search Results: 1 - 10 of 228739 matches for " Rafael P. Ferreira "
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Effects of the Orientation of the Mountainside, Altitude and Varieties on the Quality of the Coffee Beverage from the “Matas de Minas” Region, Brazilian Southeast  [PDF]
Williams P. M. Ferreira, Daniel M. Queiroz, Samuel A. Silvac, Rafael Sim?es Tomaz, Paulo C. Corrêa
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.78124
Abstract: Based upon qualitative parameters experiments, this study aims to investigate how the elements of the environment, where the coffee is produced, contribute to the final quality of the product. For the analyses, it was used approximately one kilogram of coffee cherry samples collected in 14 municipalities previously chosen on the East side of the Minas Gerais State, Brazil. The coffee cherry samples were collected and analyzed for each of the two varieties in four levels of altitude for each exposure side of the mountain in relation to the Sun. The quality of the coffee was evaluated through the analysis of its physical characteristics and sensory analysis, popularly known as \"Test of drink or Cupping\" carried out by three tasters that belonging to the group of Q-Graders, according to the rules of national and international competitions of the Brazilian Association of Special Coffees (BSCA). Were performed analysis by means descriptive statistics, analysis of variance and multivariate analysis, all of them aiming to study the individual sensory characteristics of quality of the coffee beverage from the “Matas de Minas” region. Path coefficient analysis also was carried out for the partition of the phenotypic correlation coefficients into measures of direct and indirect effects, in order to determine the individual sensory characteristics that played a major role in the beverage final score. The results demonstrate that it is not possible to conclusively establish the differences among coffees evaluated with basis on varieties and environmental factors previously cited. It can be concluded that it is not recommended to associate the quality of coffee only to a specific factor whether from the environment or being it a specific of the culture of coffee. However, the cafes that were evaluated had intrinsic quality, which were derived from the specific characteristics of the “Matas de Minas” region where they were grown.
Controle automático do fluxo de água na etapa de limpeza em unidades de beneficiamento de tomate de mesa
Ferreira, Marcos D.;Benicio, Rafael P.;Umezu, Cláudio K.;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000500020
Abstract: water is a natural resource becoming scarce in many regions. cleaning fruits and vegetables, generally demands high water consumption. a fresh market tomato packing-line is composed of: receiving, cleaning, sorting, classifying and packing. normally, the receiving process for tomatoes in a packing line happens in a constant flow, however often interruptions of operators cause loss of water, energy and also fruits cleaning efficiency. the main goal of this study was to develop an automation system for cleaning fruits, with a rational water use. for evaluating cleaning efficiency it was developed a methodology using a turbidimiter. the results showed that the cleaning efficiency index was statistically similar between the two systems; however, water consumption for the automated system was four times lower than the traditional system, suggesting a potential for commercial application on this system.
Thermomechanical Behavior Modeling of a Cr-Ni-Mo-Mn-N Austenitic Stainless Steel  [PDF]
Rafael P. Ferreira, Eden S. Silva, Carmem C. F. Nascimento, Samuel F. Rodrigues, Clodualdo Aranas Jr., Valdemar S. Leal, Gedeon S. Reis
Materials Sciences and Applications (MSA) , 2016, DOI: 10.4236/msa.2016.712062
Abstract: The analytical approach and the thermomechanical behavior of a Cr-Ni-Mo-Mn-N austenitic stainless steel were characterized based on the parameters of work hardening (h), dynamic recovery (r) and dynamic recrystallization (n, t0.5), considering constitutive equations (σ, ε) and deformation conditions expressed according to the Zener-Hollomon parameter (Z). The results indicated that the curves were affected by the deformation conditions and that the stress levels increased with Z under high work hardening rates. The σc/σp ratio was relatively high in the first part of the curves, indicating that softening was promoted by intense dynamic recovery (DRV). This was corroborated by the high values of r and average stacking fault energy, γsfe = 66.86 mJ/m2, which facilitated the thermally activated mechanisms, increasing the effectiveness of DRV and delaying the onset of dynamic recrystallization (DRX). The second part of the curves indicates that there was a delay in the kinetics of dynamic softening, with a higher value of t0.5 and lower values of the Avrami exponent (n) due to the competing DRV-DRX mechanisms, and steady state stress (σss) was achieved under higher rates of deformation.
Desempenho de modelo climático aplicado à precipita??o pluvial do Estado de Pernambuco
Silva, Bernardo B. da;Ferreira, Maria A. F.;Silva, Vicente de P. R. da;Ferreira, Rafael da C.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2010, DOI: 10.1590/S1415-43662010000400007
Abstract: in this research the performance of a probabilistic climate forecast model applied to seasonal rainfall of pernambuco state was assessed. four rainy seasons (ec) were defined and each one was subpided in two periods - initial (xi) and final (yi) - for three mesorregions of pernambuco state. the methodology proposed consisted in adjusting proportions of zi (ratio of accumulated rainfall of the first period (xi) and the total rainfall of each ec (xi + yi) in the corresponding ec, year by year, over a time series of at least 30 years, to the beta distribution for obtaining the minimum accumulated rainfall expected at 80% probability level for the period yi of ec. the validation of the model was verified with data collected from 1994 to 2002 for each ec. the lilliefors goodness-of-fit test was used to evaluate the adjustment of model for each set of zi values. results showed a good agreement between the empirical distribution and beta model. there was an increasing trend of lesser agreement in the prediction of ymin during dry or rainy years and good agreement in years considered as normal. the performed model showed success in the prognostics of ymin in more than 80% of the studied localities, over the validation period.
Clonidine Premedication Before Etomidate-Halothane Anaesthesia in Dogs
Rafael DeRossi,Joana Z. Ferreira,Ariane P. Benites,Larissa C. Hermeto,Joao M.,Negrini Neto
Journal of Animal and Veterinary Advances , 2012,
Abstract: The objective of this study was to evaluate 3 different doses of clonidine as a premedicant in dogs prior to etomidate-halothane anaesthesia. Six healthy dogs were anesthetized. Each dog received intravenously (i.v.) three different preanaesthetic protocols: CL6 (clonidine, 6 g kg 1 i.v.), CL8 (clonidine, 8 g kg 1 i.v.) or CL10 (clonidine, 10 g kg 1 i.v.). Anesthesia was induced with etomidate (4 0.8 mg kg 1) and maintained with halothane. The following variables were studied: Heart Rate (HR), Systolic Arterial Pressure (SAP), Diastolic Arterial Pressure (DAP), Mean Arterial Pressure (MAP), Respiratory Rate (RR), arterial oxygen saturation and end tidal CO2. Arterial blood pH and arterial blood gas tension (PaO2, PaCO2) were measured during anaesthesia. Time to extubation, time to sternal recumbency and time to standing were also recorded. HR and RR decreased significantly during sedation in all treatments. CL6 and CL8 decreased significantly the arterial pressures after sedation but remained stable during the anaesthetic period. Respiratory variables during anaesthesia were statistically similar in all treatments. Halothane requirements were similar for CL6, CL8 and CL10. The combination of clonidine, etomidate and halothane appears to be effective for induction and maintenance of general anaesthesia in healthy dogs.
ESTUDO POPULACIONAL DE GAMBáS, Didelphis albiventris (MAMMALIA, DIDELPHIDAE), EM UM PEQUENO FRAGMENTO FLORESTAL
Márcio L. de Oliveira,Rafael M. Ferreira,Marina de P. Gomes,Danilo S. Iha
Mastozoolog?-a neotropical , 2010,
Abstract: The white-eared-opossums are habitat generalist animals and occur in high abundance in forest fragments. Therefore these animals are important to understand the dynamics of this landscape. The population of Didelphis albiventris in a 7 ha stational semidecidual forest fragment and its agricultural surroundings was studied during one year. The population abundance, age structure and sex ratio were estimated monthly. Two movements between the fragment and the surrounding area were detected. The population dynamics showed an annual pattern with a high peak during the dry season.
The Unit-Demand Envy-Free Pricing Problem
Cristina G. Fernandes,Carlos E. Ferreira,álvaro J. P. Franco,Rafael C. S. Schouery
Computer Science , 2013,
Abstract: We consider the unit-demand envy-free pricing problem, which is a unit-demand auction where each bidder receives an item that maximizes his utility, and the goal is to maximize the auctioneer's profit. This problem is NP-hard and unlikely to be in APX. We present four new MIP formulations for it and experimentally compare them to a previous one due to Shioda, Tun\c{c}el, and Myklebust. We describe three models to generate different random instances for general unit-demand auctions, that we designed for the computational experiments. Each model has a nice economic interpretation. Aiming approximation results, we consider the variant of the problem where the item prices are restricted to be chosen from a geometric series, and prove that an optimal solution for this variant has value that is a fraction (depending on the series used) of the optimal value of the original problem. So this variant is also unlikely to be in APX.
Main Microbial Genres and Its Profile of Resistance and Sensitivity to Antimicrobials Used in the Treatment of Oncological Patients with Febril Neutropenia  [PDF]
Hélvecio Cardoso Póvoa, Richard Raphael Borges Tavares Vieira, Elias Sobreira Sathler, Isabela Nardoni Bernardes, Rafael Batista Ferreira, Mário Henrique Couto Lima, Thiago Sande Miguel, Nayrton Kalys Cruz dos Anjos, Lamara Laguardia Valente Rocha, Daniel Almeida da Costa
Journal of Biosciences and Medicines (JBM) , 2018, DOI: 10.4236/jbm.2018.61005
Abstract: Objective: To determine the main microbial genotypes and their antimicrobial resistance and susceptibility profile commonly used in the treatment of oncologic patients with febrile neutropenia, carried out through the review of the clinical histories of the patients’ medical records at the Hospital do Cancer de Muriaé-Fundacao Cristiano Varella. Methods: Quantitative research, determined the susceptibility profile of microorganisms in patients with febrile neutropenia from April 2007 to April 2008 by reviewing clinical histories of patients’ medical records at the referred hospital. Results: Of the total of 8 patients evaluated with Gram-negative microorganisms, 50% of the patients were female and 50% were male. Of the 18 patients evaluated with Gram-positive microorganisms 66% were female and 34% male. Gram-positive bacteria are prevalent and cause around 60% of documented bacteremias, although Gram-negative bacteria are more common in febrile neutropenic patientes. Conclusion: Exaggerated use of antimicrobials in hospitalized patients leads to the suppression of drug-sensitive microorganisms from the intestinal flora and promotes the persistence and growth of resistant bacteria. The antibiotic should be used in a curative manner with other therapeutic measures with the determined bacterial infection.
Manifesta??o bucal de linfoma difuso de grandes células B
Santos, Paulo Sérgio S.;Ferreira, Eduardo S.;Vidote, Rafael M.;Paes, Roberto Antonio P.;Freitas, Ronaldo R.;
Revista Brasileira de Hematologia e Hemoterapia , 2009, DOI: 10.1590/S1516-84842009005000079
Abstract: b-cell lymphomas account for around 90% of all cases of lymphoma. the appearance of oral lesions with this type of lymphoma is uncommon but in cases where involvement is seen, the anterior region of lower jaw is most frequently affected. here the case of a 22-year-old male patient is reported; he was diagnosed with large b cell lymphoma in the mediastinal pleura and after 1 year of treatment he evolved with a nodular lesion in the anterior region of the lower jaw involving the incisors. histological diagnosis and immunohistochemistry confirmed secondary lymphoma. the patient was submitt.
Estudo populacional de gambás, Didelphys albiventris (Mammalia, Didelphidae), em um pequeno fragmento florestal
Oliveira,Márcio L. de; Ferreira,Rafael M.; Gomes,Marina de P.; Iha,Danilo S.; Lorenzon,Cintia S.; Duarte,J. Maurício B.;
Mastozoolog?-a neotropical , 2010,
Abstract: the white-eared-opossums are habitat generalist animals and occur in high abundance in forest fragments. therefore these animals are important to understand the dynamics of this landscape. the population of didelphis albiventris in a 7 ha stational semidecidual forest fragment and its agricultural surroundings was studied during one year. the population abundance, age structure and sex ratio were estimated monthly. two movements between the fragment and the surrounding area were detected. the population dynamics showed an annual pattern with a high peak during the dry season.
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