Load Spectrum
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. Construction and measurement of an electromagnetic noise generator based on an automotive coil
This article covers the design of an electromagnetic noise generator which uses an automotive coil as the main component. A short theoretical analysis covers the generation of high voltage pulsed current from the available DC source originated from the battery. An electronic dimmer, a circuit used to control the brightness of a light, by controlling the effe
Rev. Bras. Ensino Fís.. Publicado em: 22/06/2017
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2. Discerning the Fatigue Crack Growth Behavior of API X65 Steels Under Sequence Loading
Abstract This paper presents the effect of sequence loading on fatigue crack growth of API X65 steel tested in room temperature. Most of pipeline steels are subjected to wide spectrum of loading during the length of service. Influence of load history effect can cause a trickier assessment to the fatigue behaviour. The objective of this study is to determine
Lat. Am. j. solids struct.. Publicado em: 2017-02
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3. Multiple facets of HIV-associated renal disease
HIV infection has a broad spectrum of renal manifestations. This study examined the clinical and histological manifestations of HIV-associated renal disease, and predictors of renal outcomes. Sixty-one (64% male, mean age 45 years) HIV patients were retrospectively evaluated. Clinical presentation and renal histopathology were assessed, as well as CD4 T-cell
Braz J Med Biol Res. Publicado em: 18/03/2016
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4. Hybrid distributed Raman/EDFA amplifier with hybrid automatic gain control for reconfigurable WDM optical networks
Nowadays, optical amplifiers designs are induced by new requirements generated by optical networks. The introduction of WDM reconfigurable networks with increasing rate from 10-40 Gb/s to 100 Gb/s and beyond, demand new optical amplifiers development with improved gain spectral flatness and noise figure for all operational range of input powers and set-point
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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5. Programa de intervenção interdisciplinar em hábitos de vida em indivíduos de risco cardiometabólico: análise de fatores dietéticos associados à melhora do metabolismo glicídico / Interdisciplinary intervention program on lifestyle in individuals at cardiometabolic risk: analysis of dietary factors associated with improvement in glucose metabolism
Introduction: Cardiometabolic diseases are global public health problems with social and economic repercussions. Unhealthy diet is seen as one of the main modifiable risk factors, being of central importance for the prevention of these diseases. Despite the evidence that certain nutrients are associated with diseases, causal relationships are still under dis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/10/2012
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6. Influência da condutividade e permissividade do solo em função da frequência no cálculo da impedância longitudinal e admitância transversal de linhas aéreas de transmissão / Influence of earth´s conductivity and permittivity frequency dependence on longitudinal impedance and transversal admittance transmission line´s parameters calculation
This thesis aims to propose more accurate models for calculating the electrical parameters of overhead power transmission lines. The influence of earth s conductivity and permittivity frequency dependence is evaluated when calculating transversal and longitudinal transmission lines parameters in the frequency range 0 to 2 MHz. This frequency range covers the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/04/2010
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7. Avaliação do grau de conversão e microdureza Knoop de compositos odontologicos fotoativados por fontes de luz emitida por diodos / Evaluation of the degree of conversion and knoop hardness of composites light-cured by LED light curing units
The purpose of this study was to evaluate and correlate the degree of conversion (DC) using Fourier-Transform Raman Spectroscopy (FT-R) and the Knoop Hardness (KHN) of composites cured by second and third generation light emitting diodes (LEDs) light curing units (LCU), Radii Cal (SDI Limited) and Ultralume 5 (Ultradent), respectively. Three composites - Fil
Publicado em: 2010
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8. Detection and typing of dengue virus by real time RT-PCR assays / Detecção e tipificação do vírus da dengue por RT-PCR em tempo real
Dengue is an infectious disease transmitted by the biting of mosquitoes of Aedes genus. Dengue virus (DENV), belonging to the Flavivirus genus, Flaviviridae family, is an important public health problem worldwide. Four antigenically distinct viruses are recognized (DENV-1, -2, -3, e -4). Infection with any of the virus serotypes causes a spectrum of the illn
Publicado em: 2009
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9. Influence of method and period of storage on the microtensile bond strength of indirect composite resin restorations to dentine
This study evaluated the influence of the method and period of storage on the adhesive bond strength of indirect composite resin to bovine dentin. Ninety bovine incisors were stored in three different solutions: 0.2% thymol, 10% formalin, and 0.2% sodium azide, during 3 periods of storage: 7 days, 30 days and 6 months, resulting in 9 groups (n = 10). The roo
Brazilian Oral Research. Publicado em: 2008-12
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10. Absortancia solar de superficies opacas : metodos de determminação e base de dados para tintas latex acrilica e PVA / Solar absorptance of opaque surfaces : a determination methods and data base for latex acrylic and PVA coatings
Solar radiation is the main responsible factor for the thermal load of buildings, and its impact over this load depends, mainly, on the solar absorptance of the building envelope. The lack of reliable and current data implies that researchers and specialists use visual perception or adopt tables based on surface colors to quantify the solar absorptance, whic
Publicado em: 2008
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11. Clinical spectrum of uncomplicated malaria in semi-immune Amazonians: beyond the " symptomatic " vs " asymptomatic " dichotomy
We analyzed prospectively 326 laboratory-confirmed, uncomplicated malarial infections (46.3% due to Plasmodium vivax, 35.3% due to P. falciparum, and 18.4% mixed-species infections) diagnosed in 162 rural Amazonians aged 5-73 years. Thirteen symptoms (fever, chills, sweating, headache, myalgia, arthralgia, abdominal pain, nausea, vomiting, dizziness, cough,
Memórias do Instituto Oswaldo Cruz. Publicado em: 24/05/2007
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12. Estudo da inferência de carregamento em histórias de vôos simulados na liga de Al aeronáutico SAE-AMS 7475 T7351 / Loading study of inference in a simulated flights history using an SAE-AMS 7475 T7351 aluminum alloy.
The loading inference and the fractographic reconstruction of fatigue crack propagation rate in simulated flight stories, as Twist, mini-Twist, Falstaff and mini-Falstaff were investigated in this work. The studied material was an aluminum alloy SAE-AMS 7475 T7351. Tensile and hardness tests were carried out in order to determine mechanical properties, as we
Publicado em: 2007