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Search Results: 1 - 10 of 236486 matches for " Cícero Melo Filho "
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Economic Regulation of Airports and its Consequences on Efficiency
Cícero Melo Filho
Revista de Literatura dos Transportes , 2009,
Abstract: The economic regulation of infrastructure services stems from the need to correct the market failures that arise with the lack of competition - a characteristic of monopoly markets. This situation leads operators to provide poor service at high prices, with a quality that is wanting. Thus, the presence of regulation is essential to correct such distortions. This paper investigates the effects of different forms of price regulation in airports. The analysis takes into account the interaction between the profits of grant and price regulation. The results show that while ROR regulation may lead to excess investment in capacity, price cap regulation is prone to induce under-investment. The extent of under-investment is found to be lower under the dual till price cap than under the single till price cap. In particular, the total factor productivity is greater under the dual till price cap than under the single till price cap or the single till ROR. The analysis supports the argument made by several economists that the dual regulation till would be better than the single till in terms of economic efficiency, especially for larger and more widely used airports.[Paper in Portuguese]
O custo do seguro aeronáutico e seus determinantes
Cícero Rodrigues de Melo Filho
Revista de Literatura dos Transportes , 2011,
Abstract:
Economic regulation of airports and its consequences on efficiency [paper in Portuguese]
Cícero Rodrigues de Melo Filho
Journal of Transport Literature , 2009,
Abstract: The economic regulation of infrastructure services stems from the need to correct the market failures that arise with the lack of competition - a characteristic of monopoly markets. This situation leads operators to provide poor service at high prices, with a quality that is wanting. Thus, the presence of regulation is essential to correct such distortions. This paper investigates the effects of different forms of price regulation in airports. The analysis takes into account the interaction between the profits of grant and price regulation. The results show that while ROR regulation may lead to excess investment in capacity, price cap regulation is prone to induce under-investment. The extent of under-investment is found to be lower under the dual till price cap than under the single till price cap. In particular, the total factor productivity is greater under the dual till price cap than under the single till price cap or the single till ROR. The analysis supports the argument made by several economists that the dual regulation till would be better than the single till in terms of economic efficiency, especially for larger and more widely used airports.
Aircraft insurance price and its determinants [paper in Portuguese]
Cícero Rodrigues de Melo Filho
Journal of Transport Literature , 2011,
Abstract: This paper analyzes the aircraft’s insurance market, and more specifically the variables that affect the premium paid by the airlines. From the development of an econometric model, we aim to provide an understanding of the dependence of the price charged by insurance companies with the parameters set by them for risk analysis of each airline. The results show that the unit cost of insurance aircraft per hour is well correlated with the exchange rate, ie the higher the exchange rate, the higher the cost of insurance, in addition, the size of the company was also relevant in the amount paid by safe, that is, the smaller the company, the largest aviation insurance expenditures. Finally after the terrorist attacks of Sept. 11 one sees an increase in unit cost of insurance aircraft per hour.
Epicarp and mesocarp of babassu (Orbignya speciosa): characterization and application in copper phtalocyanine dye removal
Vieira, Adriana P.;Santana, Sirlane A. A.;Bezerra, Cícero W. B.;Silva, Hildo A. S.;Chaves, José A. P.;Melo, Júlio C. P. de;Silva Filho, Edson C. da;Airoldi, Claudio;
Journal of the Brazilian Chemical Society , 2011, DOI: 10.1590/S0103-50532011000100003
Abstract: the mesocarp and epicarp components of the babassu palm tree were applied as novel alternative biosorbents for copper phtalocyanine textile dye removal from aqueous solutions. the natural biopolymers were characterized by elemental analyses, solid state 13c nmr, infrared spectroscopy, thermogravimetric analysis and x-ray diffractometry. results demonstrated that the compositions of the mesocarp and epicarp are similar to those of other lignocellulosic materials, and that they were very effective for removal of the textile dye turquoise remazol. a pseudo second-order kinetic model resulted in the best fit with experimental data for both epicarp and mesocarp (r2 = 0.999), providing rate constants of sorption, k2, of 0.31 and 1.43 g mg-1 min-1, respectively. the langmuir and freundlich isotherm models were employed for adsorption analysis of the experimental data in their linearized forms. the second model resulted in the better fit for turquoise remazol dye, which presented maximum adsorption of 1.44 and 2.38 mg g-1 at ph 6.0 for mesocarp and epicarp, respectively.
Prevalência de doen?a tireoideana em pacientes com diabetes tipo 1
Ramos, Alberto José S.;Costa, Ana Débora M. da;Benicio, Ana Valéria L.;Ramos, André Luiz C.;Silva, Carla Rameri A.;Carvalho, Cinthya R. de;Melo, Cícero Ludgero A. de;Oliveira Filho, Sanlio C. de;Lima, Vicente Júlio B. de;Cruz, Thomaz R. Porto da;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2003, DOI: 10.1590/S0004-27302003000200011
Abstract: introduction: type 1 diabetes (dm1) is frequently associated with other immune diseases, especially autoimmune thyroid disease (atd). objective: to determine the prevalence of atd in subjects with dm1 and to investigate possible association with other factors. methods: tsh, free t4, antiperoxydase antibody, and hemoglobin a1c were measured in 126 dm1 patients. results: atd was found in 26 (20.6%) patients being 11 (8.7%) with overt hypothyroidism, 6 (4.8%) with subclinical hypothyroidism and 9 (7.1%) with thyroiditis without thyroid dysfunction. in one patient (0.8%), atd (hyperthyroidism) preceded dm1. atd was associated with current age and age at diagnosis of dm1. no associations of atd with sex, race, duration of dm1, parity, and home place were observed. conclusions: the prevalence of atd in dm1 patients is high enough to justify screening and is related to current age and to the age at the diagnosis of dm1.
Altera??es bioquímicas e fisiológicas em sementes de milho causadas pelo ao envelhecimento acelerado
Spinola, Maria Cristina Mingues;Cícero, Silvio Moure;Melo, Murilo de;
Scientia Agricola , 2000, DOI: 10.1590/S0103-90162000000200011
Abstract: in order to evaluate biochemical (total protein, acid phosphatase, peroxidase and malate dehydrogenase electrophoresis) and physiological (germination and seed vigor) alterations occurring during corn seed accelerated aging (41°c and 100%ur), four corn seed lots of the double hybrid (ag122) were submitted to zero, 24, 48, 72, 96 and 120 hours of accelerated aging. the biochemical assays carried out (isozyme electrophoretical patterns of acid phosphatase e peroxidase) are more sensitive than the physiological test used to monitorate corn seed physiological quality deterioration during corn seed accelerated aging.
Altera es bioquímicas e fisiológicas em sementes de milho causadas pelo ao envelhecimento acelerado
Spinola Maria Cristina Mingues,Cícero Silvio Moure,Melo Murilo de
Scientia Agricola , 2000,
Abstract: Para avaliar possíveis altera es bioquímicas (análises eletroforéticas de proteínas totais e das isoenzimas peroxidase, fosfatase ácida e malato desidrogenase) e fisiológicas (germina o e vigor) que ocorrem nas sementes de milho durante a permanência das mesmas nas condi es recomendadas na metodologia do teste de envelhecimento acelerado (41oC e 100% UR), foi realizada a presente pesquisa. Utilizaram-se sementes de milho, híbrido AG122, provenientes de quatro lotes. Os períodos 0, 24, 48, 72, 96 e 120 horas de permanência das sementes na incubadora (envelhecimento acelerado) definiram os tratamentos. As altera es nos perfís isoenzimáticos (fosfatase ácida e peroxidase) detectadas nas sementes, a partir do período 72h de envelhecimento acelerado, revelaram o provável efeito deteriorativo provocado pela exposi o das sementes às condi es do teste, independentemente da qualidade do lote, apesar de a maioria dos testes determinantes da qualidade fisiológica das sementes n o terem sido sensíveis para detectar tal efeito.
Hypertonic glucose solution 10% - 25% on the mesenterium and peritoneum of the rat: macroscopic and microscopic study
Carvalho, José Cícero Ferreira de;Leal, Antenor Teixeira;Sousa, Luis Ferreira de;Herani Filho, Benedito;
Acta Cirurgica Brasileira , 2005, DOI: 10.1590/S0102-86502005000600011
Abstract: purpose: the objective of the experimental study is to detect the macroscopic and microscopic alterations of the mesenterium and parietal peritoneum when hypertonic glucose aqueous solution 10%-25% is administrated into the peritoneal cavity of the rat. methods: 90 wistar females young rats adults were used weighin between 180-250 g, numbered 1 to 90, establishing unique group and divided in three groups (a, b, c) of 30 animals chosen aleatory manner. 0,9% saline solution was used called control group, or group a, 10% glucose solution named group b, and in the others 30 was used 25% glucose solution named group c, differing in the observation period, (06h, 24h and 48h), but with the same procedure. a midline abdominal wall laparotomy was made and in the animals of the control group was injected 2 ml of a 0,9% saline solution into the peritoneal cavity. after, we made a suture in mass without to include the peritoneum. for the others groups (b, c) the rats received 10% glucose solution and 25% glucose solution injected into the peritoneal cavity respectively. all groups were kept under observation and the results were submitted to statistical analysis by a longitudinal and transversal comparative study. results: a new surgery was done in 6h, 24h and 48h, and we observed in macroscopic evaluation, the presence of fluid, serous uniforme and rosy all over the cavity. vascular congestion was present. we dried out 90 fragments of mesenterium and 90 fragments of parietal peritonium bilateral. in the microscopic study, necrosis was not present. for the mesenterium histological study we observed 16 cases (17,8%) unspecific chronic inflammation, 30 cases (33,4%) hiperplasic linfonod, 10 cases (11,1%) high vascular congestion, 6 cases (6,6%) reaction fibrosis and 28 cases (31,1%) no alteration. for the parietal peritonium histological study we observed 6 cases (3,3%) reaction fibrosis and 174 cases (96,7%) no alteration. giant cell was not present. in the statistical analisys
N?o-fechamento dos perit?nios visceral e parietal na opera??o cesariana
Moraes Filho, Olímpio Barbosa de;Costa, Cícero Ferreira Fernandes;
Revista Brasileira de Ginecologia e Obstetrícia , 1999, DOI: 10.1590/S0100-72031999001000004
Abstract: purpose: to determine whether nonclosure of the visceral and parietal peritoneum is of benefit for the intraoperative or postoperative course of cesarean section. methods: six hundred and ninety-eight women scheduled for cesarean section were randomized to either closure of both visceral and parietal peritoneum (n = 349) or no peritoneal closure (n = 349), at the maternidade da encruzilhada (cisam) in recife, from november 1997 to december 1998. statistical analysis compared intraoperative and postoperative outcome between the two groups. there was no difference regarding age, parity, gestational age, antibiotic prophylaxis, headache after spinal anesthesia, cystitis, ruptured membranes and indications for cesarean section. results: operating time, number of absorbable sutures and use of analgesics were significantly lower in the group without closure. the incidence of febrile morbidity, wound infection and endometritis was similar in the two groups. there was no difference in the need for antiphysetics, antiemetics and mineral oil. the average hospital stay was similar in the two groups. conclusions: nonclosure of the visceral and parietal peritoneum at cesarean section was not associated with adverse effects on the postoperative course; on the contrary, it reduced the use of analgesics, and intraoperatively it reduced operating time and the number of absorbable sutures.
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