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Search Results: 1 - 10 of 26201 matches for " Rodrigo;Carvalho "
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Schistosomiasis and Urothelial Bladder Carcinoma  [PDF]
Rodrigo de Carvalho Holanda Leite, Cecília Maria de Carvalho Xavier Holanda, Paulo José de Medeiros
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.39116
Abstract: Bladder cancer is the most common malignancy of the urinary tract and it affects four times more men than women. The relationship between bladder tumors and Schistosoma haematobium is well known, but only sporadic cases of bladder infection due to Schistosoma mansoni have been reported. Schistosoma mansoni infection causes an endemic disease in Brazil (schistosomiasis) and gastrointestinal disorders are very common, but disease of the urinary tract is atypical. The aim of this study was to describe a case of a patient presenting schistosomiasis (S. mansoni) and urothelial bladder carcinoma. In this case, a 37-year-old man with intermittent painless gross hematuria was investigated. Cystoscopy revealed a small pedunculated lesion in the bladder dome. Transurethral resection revealed urothelial carcinoma of the bladder, low degree, unrepresentative of the muscular layer of the bladder. After 30 days, a new transurethral resection was performed to sample acquisition of the muscular layer on the basis of the scar. Histopathology was negative for malignancy (Tumor Node Metastasis: TNM-T1). During this procedure, there was evidence of dark rounded lesion in the bladder dome. It was excised and the histopathology showed viable eggs of Schistosoma mansoni. The patient was treated orally with oxamniquine and remained in oncological monitoring with cystoscopy quarterly and serial clinical evaluation. This case reveals a rare finding of Schistosoma mansoni in the bladder and urothelial bladder carcinoma coexisting in the same patient.
Viabilidade ambiental para a cria??o de unidades de conserva??o na Ilha da Coroa, Mossoró - RN
Varela, Marisa Carvalho;Carvalho, Rodrigo Guimar?es;
Sociedade & Natureza , 2009, DOI: 10.1590/S1982-45132009000200002
Abstract: this paper aims at studying an area inserted in the fluvial lowland of the apodi-mossoró river. it is a fluvial island called ilha da coroa, situated in the alagados neighborhood, in the urban area of the municipality of mossoró. many environmental parameters were evaluated in order to verify the feasibility of creating conservation units. in order to reach this goal we researched the bibliography and the legislation related to the topic, analyzed aerial photos, applied questionnaires with residents and users of the area, visited public institutions for collecting data and checked the field. even though most of the indicators are not favorable, the possibility of creating conservation units in ilha da coroa should not be discarded, due to the great fragility of the fluvial ecosystems associated to the apodi-mossoró river.
Viabilidade ambiental para a cria o de unidades de conserva o na Ilha da Coroa, Mossoró – RN / Environment feasibility for creating conservation units in Ilha da Coroa, Mossoró, Brazil
Marisa Carvalho Varela,Rodrigo Guimar?es Carvalho
Revista Sociedade & Natureza , 2009,
Abstract: This paper aims at studying an area inserted in the fluvial lowland of the Apodi-Mossoró river. It isa fluvial island called Ilha da Coroa, situated in the Alagados neighborhood, in the urban area ofthe municipality of Mossoró. Many environmental parameters were evaluated in order to verify thefeasibility of creating conservation units. In order to reach this goal we researched the bibliographyand the legislation related to the topic, analyzed aerial photos, applied questionnaires with residentsand users of the area, visited public institutions for collecting data and checked the field. Eventhough most of the indicators are not favorable, the possibility of creating conservation units inIlha da Coroa should not be discarded, due to the great fragility of the fluvial ecosystems associatedto the Apodi-Mossoró river.
O princípio de precau o no comércio multilateral
Rodrigo Carvalho de Abreu Lima
Sequência : Estudos Juridicos e Politicos , 2003,
Abstract: A forma com que os países cuidamdas políticas relativas aos riscos deve levarem considera o o princípio de precau o nocontexto das rela es comerciais. Este artigocuida das possibilidades de aplica o doprincípio, tendo como base o Acordo sobreBarreiras Técnicas ao Comércio (TBT) e oAcordo sobre a Aplica o de MedidasSanitárias e Fitossanitárias (SPS) da OMC, eprincípios, como a cláusula da na o maisfavorecida e tratamento nacional. Para umavis o mais detalhada, discute como o painele o órg o de Apela o trataram o princípiono Caso dos Horm nios, enfatizando oartigo 5.7 do SPS, e a necessidade de verifica ode risco e justifica o científica parajustificar uma medida. Por fim, trata doprincípio diante das negocia es lan adas emnovembro de 2001, em Doha. A conclus opermite observar que o princípio n o é aceitono contexto comercial como é previsto nasconven es ambientais, o que n o afasta apossibilidade de aplicar medidas baseadasnuma vis o precaucional.The way countries handle theirpolitics concerning risks must take intoaccount the role of the precautionaryprinciple in the context of the trade relations.The article faces the possibilities of applyingthe principle, addressing the WTOAgreement on Technical Barriers to Trade(TBT) and the Agreement on the Applicationof Sanitary and Phytosanitary Measures(SPS), and principles, such as most favorednation clause and national treatment. To amore accurate vision, it discusses the waythe panel and the Appellate Body treated theprinciple in the Hormones Case, emphasizingthe article 5.7 of the SPS, and thenecessity of risk assessment and scientificjustification to justify such a measure. By theend, it talks about the principle inside thenegotiations launched in November 2001, inDoha. The conclusion states that the principleis not accepted in the trade context as in theenvironmental conventions, which do nottake out the possibility of applying measuresbased on the precautionary approach.
Expectativas e percep??es em seqüências de servi?o
Tomassini, Rodrigo;Aquino, Rodrigo;Carvalho, Frederico A. de;
RAE eletr?nica , 2008, DOI: 10.1590/S1676-56482008000200004
Abstract: taking advantage of the empirical opportunity supplied by the education service, this work proposes investigating two themes related to the analysis of service sequences: the variation in expectations and perceptions over time and their predictive capacity relative to future service quality. two research objectives were defined: (a) to test for possible alterations in perception and expectations as to graduation, by accompanying the evolution of experience with the service, and (b) to test the capacity of expectations and perceptions for forecasting service quality in a future post-graduate situation. the convenience sample comprised 71 students, divided into two groups in accordance with the term they attended to. the research instrument used was a simplified version of the servqual questionnaire. both perceptions and expectations showed a significant decrease between the groups. the variations in the two groups for the three variables were practically the same. although the individuals are not the same and have different demographic characteristics, the result suggests that the differences must be associated with their experience of the service. finally, current expectations demonstrated positive and significant impact on future expectations.
Microkernel Development for Embedded Systems  [PDF]
Rodrigo Maximiano Antunes de Almeida, Luis Henrique de Carvalho Ferreira, Carlos Henrique Valério
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.61003
Abstract:

This paper presents the development of a microkernel with a device driver controller for embedded systems. The implementation was done in C language aiming low cost microcontrollers. The proposed system allowed to perform soft real-time activities while keeping the drivers and the application isolated by a secure layer. The callback system proved itself extremely simple to use while still maintaining the security of the system regarding the temporal constraints.

Problematizando discursos heteronormativos de professores/as dos anos iniciais do ensino fundamental: algumas quest es para pensar a forma o
Juliana Ribeiro Vargas,Rodrigo Saballa Carvalho
Revista Espa?o Acadêmico , 2011,
Abstract: O presente trabalho, constituído a partir de contribui es dos Estudos Culturais em Educa o e dos Estudos de Gênero, tem como objetivo problematizar quest es de gênero e sexualidade presentes em discursos de docentes dos Anos Iniciais do Ensino Fundamental sobre comportamentos de alunos e alunas entendidos como desviantes de padr es heteronormativos. Em muitas situa es, descri es sobre os discentes s o compreendidas como verdadeiras e estáveis, uma vez que a linguagem acaba por ser percebida como “natural” (Louro, 1997). é importante referir que as quest es de gênero e de sexualidade, ao serem entendidas e descritas somente como (in)adequadas, acabam produzindo identidades de gênero estáveis, constituídas por características determinadas. Assim, é possível dizer que, através da difus o de seus discursos, os docentes acabam por constituir o que Rorty (2007), denomina como vocabulários, os quais s o utilizados como instrumentos de governamento e de produ o de verdades sobre os sujeitos escolares. A partir das análises desenvolvidas, entendemos que os discursos docentes apresentam um léxico comum, o qual diferencia os comportamentos esperados de alunos e alunas, na expectativa que os/as mesmos/as vivenciem masculinidades e feminilidades a partir de padr es heteronormativos.
Effects of Price Stabilization in IPOs on Long-run Liquidity
Rodrigo Andrade Tolentino,Antonio Gledson de Carvalho
Revista Brasileira de Finan?as , 2010,
Abstract: This article investigates the effect of the aftermarket short covering (ASC) carried out by the underwriter during the price stabilization period on long-term liquidity. For nearly 10% of the IPOs in our sample that were stabilized, the ASC represented more than 40% of the whole trade volume during the first month after the IPO; for 60% of the IPOs, more than 20%; and for only less that 20% of the IPOs, below 10% of the trade. We conjecture that because liquidity is a persistent characteristic of stocks, the effect of the ASC on liquidity may be last longing. In fact, we show that the ASC has a positive effect on liquidity over the 6 months subsequent to the stabilization period. This positive relation holds true even after controlling for many variables considered important to explain liquidity by previous authors, and the instrumentalization of the ASC.
Estimates for Carbon Stocks in Soil under Humid Grassland Areas in the Federal District of Brazil  [PDF]
Andreia M. S. Fran?a, Rodrigo J. O. Paiva, Edson E. Sano, Arminda M. Carvalho
Open Journal of Ecology (OJE) , 2014, DOI: 10.4236/oje.2014.413066
Abstract: The soils that lay below humid ecosystems are characterized as being significant holders of carbon. Because of the great susceptibility of this type of environment to anthropic changes, expressive quantities of carbon stored in the soil can be released into the atmosphere. In the Cerrado biome (Brazil), only a few types of vegetation have had carbon storage levels in their soil estimated. The main purpose of this study was to obtain basic quantitative parameters for carbon storage and to identify the general aspects of soil in regions where there exists Humid Grasslands (Campo Limpo úmido), a kind of humid area phytophysiognomy found in the Cerrado. We selected 6 regions of the Federal District with this kind of vegetation formation, characterized by low anthropic impact and located either in the interior or in the proximity of specially protected areas. In each one of the sampled regions, we marked a transect with 4 equidistant points and collected material at 7 different levels of depth: 0 - 5, 5 - 10, 10 - 20, 20 - 30, 30 - 40, 40 - 50 and 50 - 60 cm. We obtained 168 samples, with 84 related to Humid Grassland areas in gleysols and 84 samples related to areas in plinthosols—types of soil dominant in this environment. We determined the texture, bulk density and concentration of nitrogen and carbon at each depth. The average concentration of carbon for Humid Grassland areas was 55.19 g.kg-1, with an average of 61.65 g.kg-1 for Gleysols and 48.73 g.kg-1 for Plinthosols. The soil samples displayed distinct textural differences between gleysols and plinthosols. There were no significant differences in soil density (0.75 kg.dm-3 for Gleysols and 0.72 kg.dm-3 for Plinthosols). The average concentration of nitrogen was 20.66 g.kg-1, with 23.98 g.kg-1 for Gleysols and 17.34 g.kg-1 for Plinthosols. The average carbon storage for Humid Grassland areas, down to 60 cm deep, was 244.17 mg C ha-1 and the total estimated stock for these areas in the Federal District was 206.71 Gg.C. In general, the samples obtained in gleysols showed a carbon content and nitrogen level superior to those in plinthosols, although a greater sampling effort is needed to confirm the differences observed. The density values of stored carbon in the soil beneath Humid Grassland areas proved to be superior to those values observed for other types of vegetation typical for the Cerrado environment.
Chaotic Planar Piecewise Smooth Vector Fields With Non Trivial Minimal Sets
Claudio Buzzi,Tiago de Carvalho,Rodrigo Euzebio
Mathematics , 2014, DOI: 10.1017/etds.2014.67
Abstract: In this paper some aspects on chaotic behavior and minimality in planar piecewise smooth vector fields theory are treated. The occurrence of non-deterministic chaos is observed and the concept of orientable minimality is introduced. It is also investigated some relations between minimality and orientable minimality and observed the existence of new kinds of non-trivial minimal sets in chaotic systems. The approach is geometrical and involve the ordinary techniques of non-smooth systems.
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