Signal Distortion
Mostrando 1-12 de 49 artigos, teses e dissertações.
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1. The effectiveness of berberine on noise-induced hearing loss: a rat model
SUMMARY OBJECTIVE: Noise-induced hearing loss is a preventable form of hearing loss that has serious social and economic impacts. This study aimed to investigate the protective effect of berberine, a potent antioxidant and anti-inflammatory agent, against Noise-induced hearing loss. METHODS: After applying distortion product otoacoustic emission, 28 female
Revista da Associação Médica Brasileira. Publicado em: 2022
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2. Is the Level of Noise in a School Environment be Harmful to the Hearing of Teachers?
Abstract Introduction The excessive noise observed in the school environment can cause damages or losses to the learning process as well as risks to the health of teachers and students, such as physical, mental and social impairments, including, among them, hearing loss. Objective To assess otoacoustic emissions in teachers and determine whether classroom
Int. Arch. Otorhinolaryngol.. Publicado em: 2020-12
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3. The effectiveness of eugenol against cisplatin-induced ototoxicity
Resumo Introdução: A ototoxicidade refere-se ao dano celular ou comprometimento da função da orelha interna associado a qualquer agente terapêutico ou substância química e ainda representa o principal efeito colateral que restringe o uso da cisplatina. Objetivo: O objetivo deste estudo foi realizar uma investigação bioquímica, funcional e histopa
Braz. j. otorhinolaryngol.. Publicado em: 13/12/2019
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4. Comparative study between monoexponential and biexponential diffusion weighted imaging sequences in multiparametric prostate magnetic resonance imaging
RESUMO Objetivo: Comparar qualitativa e quantitativamente, em termos de qualidade de imagem, um novo protocolo de sequência de difusão biexponencial com o protocolo de difusão monoexponencial padrão, em ressonância magnética multiparamétrica da próstata. Métodos: Estudo com coleta prospectiva e análise transversal. Entre agosto e novembro de 2017
Einstein (São Paulo). Publicado em: 18/07/2019
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5. Protective effect of gallic acid against cisplatin-induced ototoxicity in rats
Resumo Introdução: A cisplatina é um agente antineoplásico amplamente usado no tratamento de vários tipos de câncer. A ototoxicidade é um dos principais efeitos colaterais que restringem o uso da cisplatina. Objetivo: O objetivo deste estudo foi investigar a eficácia protetora do ácido gálico, em termos bioquímicos, funcionais e histopatológico
Braz. j. otorhinolaryngol.. Publicado em: 10/07/2019
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6. Improved PLL-based MUSIC Algorithm for Single Receiver DF Systems
Abstract In this paper we propose an improved version of a single receiver DF system that combines a PLL scheme with the MUSIC algorithm to obtain both azimuthal and zenithal angles. The new approach uses a more efficient algorithm to remove the typical ambiguities of PLL-based schemes. We carry out several experiments to assess the algorithm performance. Am
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
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7. Desconvolução não supervisionada por filtros de erro de predição não lineares e recorrentes e sistemas imunologicos artificiais / Unsupervised deconvolution by nonlinear recurrent prediction-error filters and artificial immune systems
When data is transmitted trough a channel, it may be subject to several sorts of distortion that might cause unacceptable level of degradation. A very usual type of distortion is the intersymbol interference ,which is a consequence of the temporal spread of the information-bearing signal .To mitigate this interference ,it is usual to employ an equalizer ,whi
Publicado em: 2010
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8. TOXICITY OF AN ORGANOPHOSPHATE PESTICIDE IN THE PERIPHERAL AUDITORY SYSTEM: ANATOMIC AND FUNCTIONAL STUDY / TOXICIDADE DE AGROTÓXICO ORGANOFOSFORADO NO SISTEMA AUDITIVO PERIFÉRICO DE COBAIAS: ESTUDO ANATÔMICO E FUNCIONAL
The organophosphate pesticides are widely used in agriculture, and the widespread application of these agents, without the appropriate use of bio-security measures, has contributed to environmental degradation and the increased incidence of occupational poisoning, becoming one of the main public health problems in rural areas. Studies show that the ototoxic
Publicado em: 2009
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9. Application of wavelet transform for power quality analysis in electric arc furnace. / Aplicação da transformada Wavelet na análise da qualidade de energia em fornos elétricos a arco.
A new method for the detection and classification of the disturbances that affect the electric power quality in industrial electric systems with electric arc furnaces was developed in this work. During the fusion process of the electric arc furnaces, may occur several events that affect the electric system to which it is inserted may occur, having as charact
Publicado em: 2008
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10. Calibração radiométrica relativa da câmara CCD dos satélites CBERS-2 e CBERS-2B / Relative radiometric calibration of satellites CBERS-2 and CBERS-2B CCD camera
The satellites CBERS-2 and CBERS-2B were launched in 2003 and 2007, respectively. The images are received by reception station in Cuiabá and processed before being available to the users. In this step of the image processing, radiometric and geometric corrections are performed to improve image quality. One of the radiometric correction techniques is the rel
Publicado em: 2008
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11. AVALIAÇÃO EXPERIMENTAL DOS EFEITOS DE CINTILAÇÃO NO CANAL ÓPTICO NO ESPAÇO LIVRE EM 780 NM, 1550 NM E 9100 NM / EXPERIMENTAL EVALUATION OF SCINTILLATION EFFECTS IN FREE SPACE OPTICAL CHANNEL IN 780 NM, 1550 NM AND 9100 NM
Optical laser communication in free space is an area that has been attracting increasing interest in the last years, due to its possible capacity to resolve the problem of information diffusion, giving higher capacity access to users. Wireless optical systems offer speedy installation and initialization procedures and system flexibility, with the equivalent
Publicado em: 2008
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12. Programmable ac power source used to analyse electronic equipment performance in the electrical power system quality concept / Fonte de tensão ca trifásica programável adequada para testes de equipamentos eletrônicos no contexto da qualidade da energia elétrica
Programmable AC Power Source with Low Harmonic Distortion used to analyse equipment performance when the quality of power supply deviates from the ideal standards is, nowadays, quite imperative. In addition to other applications, this allows for the derivation of distinct load sensitivity and supportability limits as far as power quality is concerned. This w
Publicado em: 2007