The University of Taubaté is a private university located in the city of Taubaté, São Paulo state, Brazil. The institution is the largest and most traditional higher education college in the Paraíba Valley, on the suburbs of São Paulo. It was established in 1973, gathering other pre-existing institutions and unifying them.Nowadays, the university offers 42 undergraduate degrees, and 10 graduate programs, enrolling about 15,000 students. Wikipedia.
Diez J.S.,University of Taubate
The International journal of oral & maxillofacial implants | Year: 2012
To evaluate the implant-abutment interface area and the abutment screw loosening value when diamondlike carbon (DLC)-coated or titanium screws were used before and after cyclic loading. Thirty-six implants were divided into four groups according to the type of connection (external hexagon [EH] or internal hexagon [IH]) and the type of abutment screw (with [EHD/IHD] or without [EHT/IHT] DLC coating). The implants were placed in epoxy resin-glass fiber composite, and crowns cast in a metal alloy were screwed to the implants. The implant-abutment interface was measured before (VG1) and after (VG2) cyclic loading. The removal torque values were recorded. In groups with titanium screws, there was an increase in the implant-abutment interface area from VG1 to VG2, whereas in groups with DLC-coated screws, the interface area was reduced (EHT = 4.49%, IHT = 24.32%, EHD = -1.05%, IHD = -9.95%). In the IHT group only, the implant-abutment interface area showed a statistically significant difference between VG1 and VG2. The Pearson correlation indicated no significant differences among the studied factors, where r = -0.11 for EHT, 0.14 for EHD, 0.07 for IHT, and 0.43 for IHD. The implant-abutment interface areas in groups with an EH connection were larger than those in groups with an IH connection, regardless of the type of screws used. The screw loosening values decreased in all groups after cyclic loading. No correlation between the implant-abutment interface area and the screw loosening value was seen.
Cavalli V.,University of Taubate
Quintessence international (Berlin, Germany : 1985) | Year: 2010
OBJECTIVE: Since little is known about the effects of carbamide peroxide (CP) containing fluoride (F) or calcium (Ca), this study evaluated the effects of experimental and commercially available bleaching agents, with or without F and Ca, on enamel. METHOD AND MATERIALS: Sound enamel slabs were randomly divided into six groups (n = 10): placebo gel (PLA); Whiteness (WHI-10% CP; FGM); Opalescence F (OPA-10% CP+F; Ultradent); Pola Night F (PN-10% CP+F; SDI); and experimental gels: 10% CP + F (CPF) and 10% CP + Ca (CPCa). The samples were submitted to 6-hour gel applications daily for 14 days and stored in remineralizing solution after treatment. Enamel microhardness measurements were performed at baseline and after bleaching. In addition, the analytical concentrations of F and Ca and the pH of the water used to rinse the bleached surface were analyzed by means of ion-selective electrode, atomic absorption spectroscopy, and pH meter, respectively. RESULTS: Enamel surface microhardness significantly decreased after bleaching with nonenhanced 10% CP (WHI). The chemical analyses suggest F uptake promoted by high-concentrate F bleaching gels (CPF, OPA, and PN) and a F loss with nonenhanced 10% CP bleaching gels (PLA, WHI). CP agent enhanced with Ca (CPCa) also caused Ca enamel uptake. CONCLUSION: Enamel was susceptible to mineral changes during bleaching treatment, but mineral loss was minimized by the addition of F and Ca to bleaching agents.
Lamas W.D.Q.,University of Taubate |
Lamas W.D.Q.,University of Sao Paulo
Renewable and Sustainable Energy Reviews | Year: 2013
This work proposes to use thermodynamic modelling, and fuzzy thermoeconomic to optimise the small waste water treatment plant work period concerning to sewage treatment and energy generation through products associated to it. Thermoeconomic optimisation is described as a fuzzy non-linear programming problem in those local criteria is multi-objective: maximum exergetic efficiency and minimal total cost rate. These objective functions and constraints for this non-linear programming problem can be structured and represented by fuzzy sets. Several simulations about real possibilities are done to search the best performance configuration for the small waste water treatment plant. Results deal to previous system optimisation that was a physical optimisation through a thermoeconomic analysis. Then, Pareto set for this one indicated that the system had been optimised previously and it is working with better configuration. © 2012 Elsevier Ltd.
Nascimento L.F.C.,University of Taubate
Brazilian Journal of Medical and Biological Research | Year: 2011
The objective of the present study was to estimate the contribution of environmental pollutants to hospital admissions for cardiovascular disease. A time series ecological study was conducted on subjects aged over 60 years and living in São José dos Campos, Brazil, with a population near 700,000 inhabitants. Hospital admission data of public health patients (SUS) were obtained from DATASUS for the period between January 1, 2004 and December 31, 2006, according to the ICD-10 diagnoses I20 to I22 and I24. Particulate matter with less than 10 μm in aerodynamic diameter, sulfur dioxide and ozone were the pollutants examined, and the control variables were mean temperature and relative humidity. Data on pollutants were obtained from the São Paulo State Sanitary Agency. The generalized linear model Poisson regression with lags of up to 5 days was used. There were 1303 hospital admissions during the period. Exposure to particulate matter was significantly associated with hospitalization for cardiovascular disease 3 days after exposure (RR = 1.006; 95%CI = 1.000 to 1.010) and an increase of 16 μg/m 3 was associated with a 10% increase in risk of hospitalization; other pollutants were not associated with hospitalization. Thus, it was possible to identify the role of exposure to particulate matter as an environmental pollutant in hospitalization for cardiovascular disease in a medium-sized city in Southeastern Brazil.
Salinas C.T.,University of Taubate
International Journal of Thermal Sciences | Year: 2010
This work presents an inverse analysis for temperature field estimation in a two-dimensional gray media; it uses a multidimensional spatial scheme and high order angular quadrature in the discrete ordinates method. The participating media system contains absorbing, emitting, isotropic scattering gray medium. The radiative intensities exiting in some points of boundary surfaces, which simulate data of sensing devises, are known. In this work, the Discrete Ordinates Scheme with Infinitely Small Weight (DOS + ISW) is used to calculate data values. The conjugate gradient method is used to solve the inverse radiation problem for determining the temperature field. The inverse problem is formulated as an optimization problem that minimizes the error between the calculated and the simulated measurement of radiation intensity leaving the media that is sensed at one, two or four points at the boundary of the cavity. The numerical results are obtained by considering simulated data with and without noise. Different arrangements of the position of the sensors at the cavity boundary were analyzed. The temperature field has been estimated with accuracy by using LC11 and Tn6 angular quadratures of DOM when four or two sensors were used and the results for four and two sensors are very close. Also, the effects on the estimations of non-uniform distribution of the absorption coefficient (with random errors of 10%) were analyzed. © 2009 Elsevier Masson SAS. All rights reserved.