Speed Conduction
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. A Comparative Study of the Heat Input During Laser Welding of Aeronautical Aluminum Alloy AA6013-T4
ABSTRACT The heat input is the amount of energy supplied per unit length of the welded workpiece. In this study, the effect of two different heat inputs in laser beam welding of a high strength aluminum alloy AA6013-T4 was evaluated from macrostructural and microstructural points of view. The experiments were performed using a continuous wave 2 kW Yb-fiber l
J. Aerosp. Technol. Manag.. Publicado em: 14/06/2018
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2. Fractional heat conduction with finite wave speed in a thermo-visco-elastic spherical shell
This problem deals with the thermo-elastic interaction due to step input of temperature on the stress free boundaries of a homogeneous visco-elastic orthotropic spherical shell in the context of a new consideration of heat conduction with fractional order generalized thermoelasticity. Using the Laplace transformation, the fundamental equations have been expr
Lat. Am. j. solids struct.. Publicado em: 2014-12
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3. Estudo teórico da condução de calor e desenvolvimento de um sistema para a avaliação de fluidos de corte em usinagem / Theoretical study of heat conduction and development of a system for evaluation of cutting fluids in machining
Due to the rapid growth and development of machining processes there has been a demand for environmental sustainability and news cutting fluids have been applied. A reliable assessment of their efficiency in cooling the workpiece, tools and improving productivity is still a requirement. The present thesis presents a theoretical study and a proposal of a syst
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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4. Limiares eletrofisiológico e psicoacústicos por via óssea em indivíduos normais e com perda auditiva. / Electrophysiological and psychoacoustic thresholds bone in normal hearing impaired
To investigate the electrophysiological thresholds obtained by bone and compared them with the psychoacoustic thresholds obtained in pure tone audiometry in adults with normal hearing and with different types and degrees of hearing loss. Methods: The sample consisted of 70 subjects, 35 men and 35 women (30 normal, 10 with conductive hearing loss, 10 with mil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/01/2011
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5. Identificação dos limiares de lactato, ventilatórios e eletromiográficos em exercício resistido
Resistance training (RT) has been subject of several scientific studies, since its application not only for aesthetic purposes, but in health promotion and sports activities. To understand the determinants of physical performance is necessary to analyze biochemical, biomechanical and physiological phenomena triggered as a result of each physical activity pro
Publicado em: 2010
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6. Estudo experimental da condução de calor no fresamento de materiais endurecidos utilizando altas velocidades de corte / Experimental study on heat conduction in milling of hardened materials using high speed cutting
Modernas empresas buscam a melhoria dos seus sistemas de produção a fim de aumentar a produtividade e a qualidade de produtos. A tecnologia de usinagem com alta velocidade de corte (HSC High Speed Cutting) permite aumentar as taxas de remoção de material, as tolerâncias dimensionais das partes, assim como a melhoria do acabamento superficial. Esta te
Publicado em: 2006
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7. Influence of an odd structure in cross ply tires. / Influência da estrutura ímpar em pneus de lonas cruzadas (cross-ply).
The tire is the only bond between the vehicle and the ground, is it that transmits all the power and load, and guarantees the driven and conduction of the automobile. The resistant structure of a tire is one of the most important factors for the efficiency, type of application and security. Knowing these parameters is the primary condition to design a tire.
Publicado em: 2006
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8. Coupled tridimensional heat and moisture transfer in soils under buildings / Transferência tridimensional acoplada de calor e de umidade em solos sob edificações
After the wide world crisis of energy in the 70#s and the interest in energy consumption reduction, some computational programs had been developed to simulate the building energy performance. However, these codes present some simplifications on their calculation routines of heat transfer through the ground. In this way, we have described a mathematical model
Publicado em: 2003
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9. Acões motrizes e representações sociais no jogo do laço no vale do Itabapoana
It was investigated corporal movements and meanings of the sporting practice of the laço do boi (ox roping), own rural game ofthe Northwest of Rio de Janeiro and South of Espírito Santo, whose objective is to lasso, set up in horse, a calf in escape by approximately 100 meters of distance. More specifically, the nature of the game and the configuration of
Publicado em: 1999
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10. Firing properties of single human motor units during locomotion.
The discharge properties of single motor units in the short extensors of the toes were studied during normal locomotion using electromyographic recordings which permitted the identification of single motor unit potentials. The single motor units were recruited in the same order during slowly increasing speed of locomotion as they were during slowly increasin
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11. Discharges of pyramidal tract and other motor cortical neurones during locomotion in the cat.
A method is described for chronically implanting fine flexible microwires into cat motor cortex, which permitted extracellular recordings to be made from 165 single neurones. Most units were recordable for 12 h and some for up to 2 days. Of the neurones tested, 57% were shown to project to the medullary pyramid (pyramidal tract neurones, p.t.n.s). Antidromic
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12. Refractory period of human motor nerve fibres.
Using a collision technique, the ulnar nerve was made refractory for a shorter distance normally covered in 0.5 ms or a longer distance covered in 1.5 ms. Studying the shorter refractory segment with paired shocks of maximal intensity, the test response first appeared (more than 5% of unconditioned response) at an interstimulus interval of 1.16 +/- 0.18 ms (