163 resultados para Buck-boost


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Esse trabalho teve como objetivo avaliar, clinicamente, a efetividade de dois agentes clareadores aplicados sobre a superfície dentária durante 45 minutos, sem troca do gel. Foram selecionados 10 pacientes de acordo com os critérios de inclusão e exclusão, e a arcada superior dos pacientes foi dividida em duas hemiarcadas (n = 10): na hemiarcada direita (HD), foi aplicado o peróxido de hidrogênio a 35% (PH) Clàriant Office (Angelus); e, na hemiarcada esquerda (HE), o PH 38% Opalescence Boost (Ultradent). Foram realizadas duas sessões clínicas, de 45 minutos cada, com intervalo de uma semana entre as sessões. Inicialmente, ao tratamento clareador, os pacientes receberam profilaxia, moldagem para guia de mensuração de cor com silicone de condensação e avaliação de cor por meio de um aparelho espectrofotômetro Vita Easyshade (Vita Zhanfabrik, Alemanha). Após 14 dias do término do tratamento clareador, foi realizada a mensuração final da cor dos dentes. Os dados foram submetidos ao teste t e de Tukey (p < 0,05). Os resultados demonstraram não haver diferença estatisticamente significativa entre as hemiarcadas quanto à efetividade do clareamento (p = 0,146) e nem quanto à sensibilidade. Pode-se concluir que a aplicação dos materiais avaliados sem troca do gel, por 45 minutos, foi eficaz em promover o clareamento de dentes vitais e com baixa sensibilidade dentária.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Este trabalho teve como objetivo avaliar longitudinalmente um novo protocolo para técnica de clareamento de dentes vitais em consultório. Foram selecionados 20 pacientes, com critérios preestabelecidos, e divididos aleatoriamente, de acordo com o produto utilizado, em 2 grupos (n=10): Grupo 1 — Opalescence Xtra Boost (Ultradent); e Grupo 2 — White Gold Office (Dentsply). Os agentes clareadores foram aplicados apenas uma vez, durante 45min, e cada paciente submetido a duas sessões clareadoras. Para avaliação da cor inicial dos dentes, após 1 mês e após 3 meses do tratamento clareador, foi utilizada a escala de cor Vita Clássica, ordenada pela luminosidade. Concluiu-se que não há diferença no clareamento ou sensibilidade dentária entre os grupos, sendo desnecessária a troca do gel clareador e/ou a utilização de fonte de luz para os agentes clareadores avaliados.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Relevância:

10.00% 10.00%

Publicador:

Resumo:

This paper presents the development and the main results for an interleaved boost rectifier operating as a special input power stage for a trolleybus type vehicle, allowing its feeding by alternate current (AC) or direct current (DC) distribution power systems. When feeding with two wires (single phase) alternate current distribution system, the converter accomplish active power factor correction, providing a relatively sinusoidal current with low total harmonic distortion (THD) and fully complying with IEC 61000-3-4 standards. In addition, a management control system promotes the required automatic operation changes for the proposed rectifier when the vehicle is changing from the DC distribution power system to the AC distribution power system and vice-versa, keeping its original electrical DC system characteristics for the adjustable speed driver sub-system. The main experimental results for a prototype rated at 150kW are presented, considering its application for a trolleybus with DC adjustable speed driver, demonstrating the proposed converter benefits and the possibility of AC feeding system for trolleybus type vehicle.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Twelve athletes (13,9±1,1 years, 169,0±6,0 cm and 59,5±13,5 kg ofbody weight) were under went to anthropometric and body compositionassessments, and maximum concentric strength of lower limbs. The jumptest in the water was done by ‘boost’ and scaled to jump height. The resultsof strength (Leg Press 45: 157,1±43,3 kg; Leg Extension: 72,1±12,9 kg),anthropometry (circumferences of arm: 26,0±3,3 cm; thigh: 50,5±7,7 cm;shoulder: 96,0±8,0 cm, and diameter of elbow: 4,7±0,5 cm; wrist: 3,2±0,3cm; knee: 7,9±0,6 cm; bi-acromial: 37,5±3,8 cm; and bi-iliac: 25,4±4,3cm), BMI (20,7±4,0 kg/m²), and body composition (fat: 8,5±4,3%) were notrelated to the values of vertical jump performance (47,80 ? 4,35 cm), as didshowed for body height (0,595). Thus, athletes height was one able to influencethe jump performance by modifying it self, perhaps by maturity.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

This is a theoretical paper that seeks to work, through interrelations, concepts relating to contemporary aesthetics in parallel to phenomenon of perception. It begins with the aesthetic interaction between content and form in order to trace the development of perceptionexpression interaction, inserted into the mutual action of its physical and psychical aspects "through behind" a thinking mind. In order to generalize such interaction to reality itself as a natural and evolutionary cycle, we start from the analysis of perception of more complex organic beings, endowed with consciousness, to extend the question to the simplest organic beings, as even to inorganics. It is based upon principles of equilibrium and unity in diversity to highlight a historical fact that it seems undeniable: that man evolves and this evolution, their perception clears, while that is particularized your experience and aesthetic judgment. Having in the art, the activity can boost an evolution more profound while pleasurable.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The principles and dimensions of sustainability concept is increasingly gaining ground within the building industry. Over the past decades, its applicability within the different environments and for different buildings typologies have been study to attend better the present populations and future generations. It is within this scenario that international certifications started to appear. The most famous and developed one being LEED certification system. In Brazil, as a support to the certification and also sustainability practices and conducts, was founded the Brazilian Council for Sustainable Construction (CBCS). The council and the certifications have the objective to disseminate and generate awareness to reduce energy and water consumption, aiming for life quality. Many constructions around de country have already the international certification, which also boost the rise of national certifications with specific criteria for the national context. However, such certificates are mainly destiny for medium and high standard buildings, often as a commercial advantage to explain the high costs. The purpose of this work is to be able to define what is being sustainable in the construction industry, taking for basis, LEED and CBCS. In addition, since there is a significant increase in the production of Housing Social Interest, the other angles will be to analyze how to apply the practices and sustainable technologies for low-cost projects with the objective to balance the three dimensions of sustainability: environmental, social and economics.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)