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Search Results: 1 - 10 of 65781 matches for " Rafael Alessandro Ferreira;Oliveira "
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Slot Allocation in Airports: The International Experience and the Concentration of Flight Frequencies in Brazil
Rafael Fraga,Alessandro Oliveira
Revista de Literatura dos Transportes , 2009,
Abstract: This paper analyzes the origin of the limitation of slots in the airports as a controller for the excess of demand, aiming to help the airport planning by showing the historical facts related with this subject around the world. Up to now, it stills being difficult to solve this problem originated in the 60’s. We intend to show that this subject is very polemic and influenced by a lot of political reasons; also pointing other techniques used for the same purpose (controllers for the excess of demand).[Paper in Portuguese]
ética em pesquisas com seres humanos: do conhecimento à prática
Lima, Sandro Gon?alves de;Lima, Tatiana Albuquerque Gon?alves de;Macedo, Larissa Araripe de;Sá, Michel Pompeu Barros de Oliveira;Vidal, Marcela de Lima;Gomes, Rafael Alessandro Ferreira;Oliveira, Laura Correia;Santos, Ana Maria Aguiar;
Arquivos Brasileiros de Cardiologia , 2010, DOI: 10.1590/S0066-782X2010005000097
Abstract: background: in brazil, resolution 196/96 and its amendments regulate the preservation of rights, respect and dignity of human beings involved in research. objective: to analyze the adequacy of free communications (fc) presented during the xviii congresso pernambucano de cardiologia to resolution 196/96. methods: during a cross-sectional study, interviews were carried out with the authors of the fc presented at the congress and the abstracts of the studies were assessed in order to identify the need for previous approval by a research ethics committee (rec). results: a total of 90 fc were presented and, in most of them (86.8%), medical files were the most commonly used source of data. only 23.1% of the fc were submitted to the assessment of a rec and 15.4% of them used a free and informed consent form (ficf). among the authors whose studies were not assessed by a rec, 65.6% stated that this conduct was not necessary and 18% of them were unaware of the need to submit the study to such assessment. the written authorization given by the institution where the fc were carried out was not obtained in 56.6% of the studies. most of the authors (80.0%) stated that they had never read resolution 196/96. the proportion of fc submitted to a rec was significantly higher among authors that had read resolution 196/96 (p = 0.005). the fc design influenced the non-submission of the studies to a rec (p < 0.001). most of the fc that were authorized by the institution where they were carried out were submitted to a rec (p < 0.001). conclusion: most of the fc presented at the congress did not follow the brazilian regulations concerning the ethics in research.
Slot allocation in airports: the international experience and the concentration of flight frequencies in Brazil [paper in Portuguese]
Rafael Fraga,Alessandro V. M. Oliveira
Journal of Transport Literature , 2009,
Abstract: This paper analyzes the origin of the limitation of slots in the airports as a controller for the excess of demand, aiming to help the airport planning by showing the historical facts related with this subject around the world. Up to now, it stills being difficult to solve this problem originated in the 60’s. We intend to show that this subject is very polemic and influenced by a lot of political reasons; also pointing other techniques used for the same purpose (controllers for the excess of demand).
An empirical game-theoretical approach to model a price war in the Brazilian airline industry
José Maria Ferreira Jardim da Silveira,Alessandro V. M. Oliveira
Journal of Transport Literature , 2008,
Abstract: This paper develops a model of post-liberalization price competition between airlines on the route Rio de Janeiro - S o Paulo. The intense price competition episode culminated in the rupture of a thirty-nine year-old cooperative structure - the air shuttle service cartel. By modeling and estiamting parameters of a two-stage Stackelberg game with incomplete information, we aim at contributing to the understanding of price war rationality in the airline industry.
Extreme Events Assessment Methodology Coupling Debris Flow, Flooding and Tidal Levels in the Coastal Floodplain of the São Paulo North Coast (Brazil)  [PDF]
Rafael de Oliveira Sakai, Diego Louren?o Cartacho, Emilia Arasaki, Paolo Alfredini, Alessandro Pezzoli, Wilson Cabral de Sousa Júnior, Maurizio Rosso, Luca Magni
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.45B006
Abstract:

The North Coastal Region of the State of S?o Paulo, which comprises the Municipalities of Caraguatatuba, S?o Sebasti?o, Ilhabela and Ubatuba, is one of the most prone to flooding and debris flow deposition Brazilian areas, owing to hydrological extreme rainfall events usually coupled with extreme tidal levels. This risk is also high due to human lives and material assets, with increasing population rates and the establishment of large companies such as the Oil industry, with reduced defense/prevention measures and works.The catastrophic scenario of the city of Caraguatatuba, in March 1967, resulting from one of the most serious natural disasters in Brazil, fosters discussions about probabilities of heavy rainfall-caused events and rise in the sea level in coastal areas. Hence, this research is a consequence of this reality. The research is founded on an innovative methodology based on the analysis of past data of rainfall and tidal stations, complemented with debris flow registers in the region of the north coastal zone of the State of S?o Paulo (Brazil). The anaysis developed involved the meteorological, hydraulic, geotechnical and statistical knowledge areas.Practical results are intended to be used for urban planning, designs of macro-drainage, fluvial, maritime projects and debris flow retention structures. These practical applications will then associate the probability of occurrence of certain types of heavy rainfall-caused events such as flooding or debris flow coupled with a corresponding increase in tidal levels.

Efeito dos parametros de extrus?o termoplástica sobre as propriedades tecnológicas de farinhas pré-cozidas elaboradas com arroz e feij?o
Carvalho, Ana Vania;Rios, Alessandro de Oliveira;Bassinello, Priscila Zaczuk;Ferreira, Tayse Ferreira;
Brazilian Journal of Food Technology , 2012, DOI: 10.1590/S1981-67232012005000029
Abstract: the objective of this study was to obtain a pre-gelatinized flour from a mixed rice and bean flour, and to evaluate the influence of the formulations and processing conditions on the technological properties and protein content of the final product. a complete 23 factorial design was adopted with central and axial points to prepare the mixed pre-gelatinized flour, varying the following parameters: percent of bean flour, moisture content and processing temperature. the responses were: protein content (y1), water absorption index (y2) and water solubility index (y3). the formulations were processed in a single screw extruder. the temperature in zone 3 of the extruder varied between 46 and 114 °c, according to the experimental design. the processed products were dried in an air circulating oven at 50 °c for about 15 hours, presenting a final moisture between 4 and 6%, and were then ground in a knife mill and packed into polyethylene bags until analysed. for the protein content, only the percent bean flour was significant and with a positive effect, that is, the higher the bean flour content, the higher the protein content of the final product, independent of the processing conditions - temperature or moisture. for the water absorption index (wai), the moisture content, temperature and moisture and temperature interaction were significant. higher wai values were observed at intermediate temperatures (60 to 80 °c) and high moisture contents (17 to 20%). for the water solubility index (wsi), the moisture content, temperature and moisture e temperature interaction were again significant, higher wsi values being observed at higher temperatures (100 °c) and lower moisture contents (14%). according to the experimental design, the pre-gelatinized mixed rice and bean flour showed the best technological characteristics when processed at a temperature of 70 °c with 21% moisture content and the addition of 30% bean flour to the mix.
Efeito dos parametros de extrus o termoplástica sobre as propriedades tecnológicas de farinhas pré-cozidas elaboradas com arroz e feij o Effect of the thermoplastic extrusion parameters on the technological properties of pre-cooked flours prepared with rice and beans
Ana Vania Carvalho,Alessandro de Oliveira Rios,Priscila Zaczuk Bassinello,Tayse Ferreira Ferreira
Brazilian Journal of Food Technology , 2012,
Abstract: O objetivo deste trabalho foi obter uma farinha pré-gelatinizada elaborada a partir de farinha mista de arroz e feij o, e avaliar a influência das formula es e condi es do processamento sobre as propriedades tecnológicas e o teor proteico do produto final. Para a elabora o da farinha pré-gelatinizada mista, utilizou-se o planejamento experimental completo 23 com pontos centrais e axiais, testando-se os parametros porcentagem de farinha de feij o, umidade e temperatura de processamento, tendo como respostas teor de proteína (Y1), índice de absor o de água (Y2) e índice de solubilidade em água (Y3). As formula es testadas foram processadas em extrusora monorrosca. A temperatura na zona 3 do extrusor variou entre 46 e 114 °C, conforme o planejamento experimental. Os ensaios processados foram submetidos à secagem em estufa com circula o de ar a 50 °C por cerca de 15 horas, apresentando umidade final entre 4 e 6%, sendo, a seguir, triturados em moinho de facas e armazenados em sacos de polietileno até o momento das análises. Para a variável teor de proteína, somente a porcentagem de farinha de feij o foi significativa e com efeito positivo, ou seja, aumentando-se a quantidade desta farinha, o produto final terá um maior teor proteico, independentemente da temperatura ou da umidade utilizada no processamento. Para a variável índice de absor o de água, a farinha de feij o, o teor de umidade, a temperatura e a intera o umidade e temperatura foram significativos. Observou-se maior índice de absor o de água em temperaturas intermediárias (60 a 80 °C) e altas umidades (17 a 20%). Para a resposta índice de solubilidade em água, as variáveis umidade, temperatura e a intera o umidade e temperatura também foram significativas, observando-se maiores índices de solubilidade em água em temperaturas mais elevadas (100 °C) e umidades mais baixas (14%). De acordo com o planejamento experimental, a farinha pré-gelatinizada mista de arroz e feij o apresenta as melhores características tecnológicas quando processada sob temperatura de 70 °C, 21% de umidade e com adi o de 30% de farinha de feij o à mistura. The objective of this study was to obtain a pre-gelatinized flour from a mixed rice and bean flour, and to evaluate the influence of the formulations and processing conditions on the technological properties and protein content of the final product. A complete 23 factorial design was adopted with central and axial points to prepare the mixed pre-gelatinized flour, varying the following parameters: percent of bean flour, moisture content and processing temperature.
Insolvency and crisis: a study of the determinants of the exit of airlines in the Brazilian market [paper in Portuguese]
Rodrigo Ferreira de Oliveira,Rodrigo Arnaldo Scarpel,Alessandro V. M. Oliveira
Journal of Transport Literature , 2008,
Abstract: This paper constitutes the first attempt in the literature to identify the determinants of the bankruptcy of the major legacy carriers in Brazil within the period of 1983 to 2003. The airlines under analysis here were Varig, Vasp and Transbrasil. The situation of the industry as a whole was also analyzed. The econometric study of the bankruptcy airlines allowed a better understanding of the causes of the exit of an airline in the market. An adequate prediction of those leaves allows the regulatory authorities to anticipate the actions that will soften these effects, especially regarding the disruption of the service. To determine the airlines’ bankruptcy conditions three financial indexes had been analyzed: Debt Ratio (EG), Asset Turn (GA), and Return on Assets Before Interest and Income Taxes (ROA AJIR). An index PS, that reflects the airlines’ solvency, was also analyzed. The PS index is based on the other indexes EG, GA, and ROA.
View of the Public Health System users regarding proctology
Sim?es, Alessandro Andrade;Schlindwein, Rafael Felix;Ferreira, Maria Gabriela Lazcano Alves;Genovez, Alynne;Koerich, Elisa;
Journal of Coloproctology (Rio de Janeiro) , 2012, DOI: 10.1590/S2237-93632012000200003
Abstract: proctology is a specialty of extreme importance due to the high prevalence of anorectal diseases in the population. despite this fact and its history from the origin of humanity, it is marked by insufficient knowledge, prejudice and teasing. objective: evaluate the degree of knowledge about proctology, obtaining data, which may guide and emphasize the need for campaigns to disseminate the specialty. method: an ecological study was conducted on the people's degree of knowledge about the specialty of proctology. we interviewed 200 patients from august 2008 to january 2009, who came to the outpatient clinic of the unified health system, in five different medical specialties in the city of itajaí (sc). results: among the interviewees, 86% did not know what proctology was. of the 28 (14%) respondents that said they knew it, only 21 (10.5%) answered correctly when they were asked what the specialty was about. conclusion: despite the high prevalence of anorectal diseases, a great percentage of the population is unaware of the specialty. this fact could be due to the social prejudice and the lack of information provided by health professionals.
Produ o e parametros fisiológicos do amendoim em fun o do estresse salino Production and physiological parameters the peanut as a function of salt stress
Delfran Batista dos Santos,Paulo Afonso Ferreira,Flavio Gon?alves de Oliveira,Rafael Oliveira Batista
IDESIA , 2012,
Abstract: O trabalho teve por objetivo avaliar os efeitos da salinidade da água de irriga o sobre o a condutividade elétrica do extrato da pasta saturada do solo (CEes) e as altera es dos parametros fisiológicos e de produtividade da cultura do amendoim. O experimento foi instalado no delineamento em blocos casualizados, com seis tratamentos e quatro repeti es. Os tratamentos consistiram de seis fra es de lixivia o, equivalentes a 40, 30, 20, 10, 5 e 0% da lamina de água de irriga o, sendo que para a fra o de lixivia o de 0% usou-se água doce (0,1 dS m-1) e para as demais água salina (3 dS m-1). Os resultados mostraram que aCEes diminuiu significativamente com o aumento das fra es de lixivia o, o decréscimo do potencial osmótico foliar na planta de amendoim implicou na redu o da produtividade e o teor de clorofila e a massa de matéria seca total reduziram significativamente com o aumento da CEes. The present study aims to evaluate the effect of water salinity from irrigation on the electrical conductivity of the saturated extract of soil (CEes) and the alterations of the physiological parameters and productivity on peanut cultivation. The experiment was conducted in a randomized block design with six treatments and four replications. The treatments consisted of a control with low electrical conductivity water (0.1dS m-1) and five leaching fractions (0.4; 0.3; 0.2; 0.1; and 0.05) with water of 3 dS m-1. The results showed that the CEes decreased significantly with the increase of the leaching fractions; the decrease of the leaf osmotic potential in the peanut plant implied the reduction of productivity; the content chlorophyll and the total dry matter decreased significantly with the increase of the CEes.
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