32 research outputs found
Stochastic evaluation of sewer inlet capacity on urban pluvial flooding
In this paper we present an innovative methodology to stochastically assess the impact of sewer inlet conditions on urban pluvial flooding. The results showed that sewer inlet capacity can have a large impact on the occurrence of urban pluvial flooding. The methodology is a useful tool for dealing with uncertainties in sewer inlet operational conditions and contribute to comprehensive assessment of urban pluvial risk assessment
Stochastic urban pluvial flood hazard maps based upon a spatial-temporal rainfall generator
It is a common practice to assign the return period of a given storm event to the urban pluvial flood event that such storm generates. However, this approach may be inappropriate as rainfall events with the same return period can produce different urban pluvial flooding events, i.e., with different associated flood extent, water levels and return periods. This depends on the characteristics of the rainfall events, such as spatial variability, and on other characteristics of the sewer system and the catchment. To address this, the paper presents an innovative contribution to produce stochastic urban pluvial flood hazard maps. A stochastic rainfall generator for urban-scale applications was employed to generate an ensemble of spatially—and temporally—variable design storms with similar return period. These were used as input to the urban drainage model of a pilot urban catchment (~9 km2) located in London, UK. Stochastic flood hazard maps were generated through a frequency analysis of the flooding generated by the various storm events. The stochastic flood hazard maps obtained show that rainfall spatial-temporal variability is an important factor in the estimation of flood likelihood in urban areas. Moreover, as compared to the flood hazard maps obtained by using a single spatially-uniform storm event, the stochastic maps generated in this study provide a more comprehensive assessment of flood hazard which enables better informed flood risk management decisions
Produção de resinas ligno-fenol-formaldeĂdo a partir do bagaço da cana-de-açúcar.
Este Comunicado TĂ©cnico visa apresentar recomendações para produção de resina ligno-fenol-formaldeĂdo, em escala de laboratĂłrio, a partir da lignina extraĂda do bagaço da cana-de-açúcar e a prova de conceito de sua aplicação em placas de fibra de mĂ©dia densidade (MDF medium density fiberboard).bitstream/item/206193/1/CT-255.pd
Produção de polibenzoxazina a partir da lignina do bagaço da cana-de-açúcar.
Este Comunicado TĂ©cnico visa apresentar um processo para produção de uma resina benzoxazina, em escala de laboratĂłrio, a partir da lignina extraĂda do bagaço da cana-de-açúcar.bitstream/item/206830/1/CT-261.pd
Stochastic urban pluvial flood mapping based upon a spatial-temporal stochastic rainfall generator
Malignant hypertension with intestinal ischemia secondary to juxtaglomerular cell tumor
Malignant hypertension is a well-defined condition associated with high blood pressure and acute target-organ damage. Although 95% of cases are secondary to essential hypertension, its etiological profile is broad. Juxtaglomerular cell tumor is a rare condition, with only approximately 65 cases reported to date. We describe a patient with malignant hypertension with acute renal failure and intestinal ischemia secondary to a juxtaglomerular cell tumor. We believe this is the first case of juxtaglomerular cell tumor causing malignant hypertension. the diagnostic approach and treatment are discussed.Univ SĂŁo Paulo, Sch Med, Hosp Clin, Div Nephrol, SĂŁo Paulo, BrazilUniv SĂŁo Paulo, Sch Med, Hosp Clin, Dept Pathol, SĂŁo Paulo, BrazilUniversidade Federal de SĂŁo Paulo, Div Nephrol, SĂŁo Paulo, BrazilUniversidade Federal de SĂŁo Paulo, Div Nephrol, SĂŁo Paulo, BrazilWeb of Scienc