Lightening
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. A Review of Using Conductive Composite Materials in Solving Lightening Strike and Ice Accumulation Problems in Aviation
ABSTRACT: There are many problems facing aircraft in the air during flight, such as lightning strikes and ice accumulation on aircraft surfaces. These problems usually reduce aircraft efficiency and lead to serious accidents and fatalities. However, the current protection systems used to solve these problems of aircraft represent excessive energy usage, a ha
J. Aerosp. Technol. Manag.. Publicado em: 28/03/2019
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2. ELUCIDATION OF THE ELECTRONIC SPECTRUM CHANGES OF KA-Al3+ COMPLEX BY POTENTIOMETRIC TITRATION, FTIR, 13C RMN AND QUANTUM MECHANICS
Kojic acid (KA) is an organic acid widely used in pharmaceutical industry, mainly as a skin lightening agent. Based on the ability of KA to form complexes with ions, we found the most possible kind of complex formed with cation aluminum. KA-Al3+ complex structures were studied using potentiometric and spectrophotometric (UV) titrations, FTIR and 13C NMR. The
Quím. Nova. Publicado em: 2017-08
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3. Broiler-Housing Conditions Affect the Performance
ABSTRACT In the last decades animal production has considerably increased worldwide to sustain an ever-growing human population. Among animal reared for consumption purposes, chickens are undoubtedly one of the most successful, mainly due to their rapid growth rate. The development of broiler farming has been accompanied in recent years by a substantial atte
Rev. Bras. Cienc. Avic.. Publicado em: 2017-06
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4. Internal environmental conditions of soybean processing plants and safety in workplace
ABSTRACT Currently, the domestic agricultural sector has become increasingly professionalized; therefore, measures aimed at safety in the workplace and monitoring of environmental risks have been gaining major importance in this scenario. Thus, this study aimed at assessing internal environmental conditions of four soybean processing plants (SPPs) operating
Eng. Agríc.. Publicado em: 2016-08
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5. Sobre a luz da escuridão : memória e sentidos presentes em acervos visuais anônimos
This research presents some reflections about the actions developed by the project Revelações da História (History Revelation), an initiative constituted by photograph researchers in the city of Londrina (Paraná State, Brazil), between the years of 2005 and 2008, that resulted in the identification, formation, re-integration and diffusion of anonymou
Publicado em: 2010
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6. Autonomic and neuroendocrine responses to traumatic memory retrieval / Respostas autonômicas e neuroendócrinas à recuperação de memórias traumáticas
Several procedures are capable to induce retrieval of traumatic memories (RecMem). Psychotherapy techniques have been used to reduce the traumatic memories emotional response through rebuilding and re-meaning of the traumatic memories based on the subject´s resilience. Clinical signs of autonomic activation may be seen during RecMem, not representing reacti
Publicado em: 2006
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7. O sonho de Descartes: o homem das paixões
This dissertation is an audacious proposal to closely examine the personality of René Descartes which could perhaps, lead us to a theory about his mission in life which is intimately fused with his philosophy. The complexity of his psyche as revealed by his first biographer Baillet is expressed in the progression of his writings. We have chosen our course o
Publicado em: 2006
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8. Estudo experimental da evaporação de jatos de iso-octano superaquecido. / Experimental study of evaporating jets of superheated iso-octane.
The main goal of this thesis is to present results of experiments with flashing liquid jets of iso-octane. The experiments were carried out with a liquid jet issuing from a small nozzle into a low-pressure chamber. High degrees of metastability were obtained as the liquid jet expanded within the nozzle. Injection pressure and temperature were controlled to t
Publicado em: 2005
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9. ARTIFICIAL NEURAL NETWORKS, FUZZY LOGIC AND NEURO-FUZZY SYSTEM IN THE ROLE OF SHORT TERM LOAD FORECAST / REDES NEURAIS ARTIFICIAIS, LÓGICA NEBULOSA E SISTEMAS NEURO-FUZZY NA PREVISÃO DE CARGA ELÉTRICA EM CURTO PRAZO
This thesis examines the performance of computational intelligence in short term load forecasting. The main objective of the work was to propose and evaluate neural network, fuzzy logic, neurofuzzy and hybrid systems in the role of short term load forecast, considering some variables that affect the load behavior such as temperature, comfort indexes and cons
Publicado em: 1999
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10. Determinação das condições de separação e purificação de ß-glicosidase a partir de complexo enzimatico
Cellulose is a very common natural substance. The hydrolysis of this material is caused by an enzyme complex, acting synergistically, known as cellulase. In such a complex, the enzyme β-glucosidase (EC 3.2.1.21) is responsible for the final step of hydrolysis to form glucose. This enzyme has numerous industrial applications. Particularly important among
Publicado em: 1996
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11. Monitor to characterise electrical noise in alternate current network. / Monitor para caracterização de ruídos em redes de corrente alternada.
Power line disturbances can adversely affect electronic sensitive equipment, particularly microcomputer based systems. In order to register these disturbances a power line monitor has been developed. The developed instrument is microprocessor based using a 80C86-2 as the main CPU. The following electrical disturbances can be monitored: nominal frequency devi
Publicado em: 1992
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12. Effect of ammonium salts on brain metabolism
Ammonium acetate (13 m-mol), ammonium bicarbonate (13 m-mol), and ammonium hydroxide (30 m-mol) were administered intravenously to three separate groups of five dogs. Ammonium acetate and bicarbonate were given over a period of 15 minutes, ammonium hydroxide was given for 30 minutes. In all dogs, after 15 minutes' infusion, the blood ammonia concentration wa