Cutoff Frequencies
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Neck circumference as a predictor of gestational diabetes and risk of adverse outcomes in pregnancy of Brazilian woman with overweight and obesity
ABSTRACT Objective: To evaluate the association of neck circumference (NC) with gestational diabetes (GDM) and adverse outcomes in women with overweight and obesity. Subjects and methods: This prospective study included 132 (BMI > 25 kg/m2) pregnant women without and with GDM. Standardized questionnaire and biochemical/physical evaluation were performed du
Archives of Endocrinology and Metabolism. Publicado em: 2022
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2. Compact Ultra-Wide-Band HI Monopole Antenna Loaded with C-Shaped Parasitic Elements for DVB-T and LTE Applications
Abstract In this work, a compact ultra-wide-band microstrip antenna loaded with C-shaped parasitic elements, for Digital Video Broadcasting - Terrestrial (DVB-T) and LTE 450 / 700 signal reception, is designed and presented. The proposed antenna is named “HI Monopole”, and its geometry has been designed to be simple, lightweight, and compact. Fabrication
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-09
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3. Perfilhamento do capim-piatã submetido a regimes de desfolhação intermitente
RESUMO Objetivou-se avaliar o perfilhamento da Brachiaria brizantha cv. Piatã, como base para identificação das frequências e alturas pós-corte mais adequadas para essa gramínea forrageira. Em um esquema fatorial 2 x 2, foram estudadas combinações entre duas frequências de corte (95% e máxima interceptação de luz, ILmax) e duas alturas pós-corte
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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4. Design and Synthesis of an Ultra Wide Band FSS for mm-Wave Application via General Regression Neural Network and Multiobjective Bat Algorithm
Abstract In this work is presented a hybrid bioinspired optimization technique that associates a General Regression Neural Network (GRNN) with the Multiobjective Bat Algorithm (MOBA), for the design and synthesis of the Frequency Selective Surfaces (FSS), aiming its application in data communication systems by diffusion of millimeter waves, specifically, in
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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5. Prevalence of sarcopenia and its associated factors: the impact of muscle mass, gait speed, and handgrip strength reference values on reported frequencies
OBJECTIVES: Sarcopenia is a common treatable geriatric condition. The aim of this study was to estimate the prevalence of sarcopenia and its associated factors in community-dwelling elderly living in Rio de Janeiro, Brazil, and to discuss the impact of different muscle mass, handgrip strength and gait speed cut-off values on the reported frequency of sarcop
Clinics. Publicado em: 08/04/2019
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6. Objective evaluation of vision quality in pseudophakic patients with posterior capsular opacification using double-pass retinal imaging
RESUMO Objetivo: Avaliar objetivamente a qualidade da visão óptica antes e depois da capsulotomia com Nd: YAG, obtida por imagem pelo metodo de dupla passagem de luz em pacientes com opacificação capsular posterior. Método: Análise retrospectiva de 26 olhos pseudofácicos com opacificação capsular posterior visualmente significativa, que foram subm
Arq. Bras. Oftalmol.. Publicado em: 25/02/2019
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7. Sharp Rejection and Wide Stopband Microstrip Lowpass Filters using Complementary Split Ring Resonators
Abstract Chebyshev microstrip lowpass filters with improved performance, achieved by means of circular complementary split ring resonators (CSRR), are presented. CSRR particles exhibit frequency rejection bandwidths in the vicinity of their resonant frequencies that can be used to meliorate both selectivity and stopband in microstrip lowpass filters. Two con
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-03
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8. A Compact UWB Bandpass Filter using Hybrid Fractal Shaped DGS
Abstract In this paper, a novel and compact ultra wideband (UWB) bandpass filter (BPF) based on fractal-shaped defected ground structure (DGS) is designed and developed. It is made of stepped impedance lines and a composite right/left handed-transmission line (CRLH-TL) constructed with capacitive gap in conductor strip and a hybrid fractal-shaped ring slot i
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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9. Study of different shape Electromagnetic Band Gap (EBG) structures for single and dual band applications
In this paper, single and dual band EBG structures for wider bandwidth are proposed. In each of the discussed EBGs, a metallic patch of regular geometry is chosen for the unit element. The patch is further modified by cutting slots to get extra inductance and capacitance which results into lower cut-off frequency and larger bandwidth. The proposed EBG struct
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-06
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10. Nonlocal continuum mechanics formulation for axial, flexural, shear and contraction coupled wave propagation in single walled carbon nanotubes
This paper presents the effect of nonlocal scaling parameter on the coupled i.e., axial, flexural, shear and contraction, wave propagation in single-walled carbon nanotubes (SWCNTs). The axial and transverse motion of SWCNT is modeled based on first order shear deformation theory (FSDT) and thickness contraction. The governing equations are derived based on
Lat. Am. j. solids struct.. Publicado em: 2012-08
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11. CARACTERIZAÇÃO DOS FONES [s] E [ʃ] POR MEIO DA ANÁLISE ACÚSTICA / CHARACTERIZATION OF PHONES [s] AND [ʃ] THROUGH ACOUSTIC ANALYSIS
The typical phonological development and phonological disorders are object of continuous studies in speech area, in order to characterize aspects such as phonemes acquisition, strategies of repairing presents in subjects produtions, articulatory and acoustic characteristics of sounds. In the last aspect, it becomes important, the comparison of speech data of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011
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12. The Jitter Spatial Frequency Sweep VEP: a new paradigm to study spatiotemporal development of pattern- and motion-processing mechanisms in human infants
We introduce a new VEP paradigm - the Jitter Spatial Frequency (JSF) Sweep VEP - that permits efficient mapping of the spatiotemporal tuning of the developmental motion asymmetry (DMA). Vertical sinewave gratings undergoing 90º horizontal oscillatory displacements (6 or 10 Hz) were presented while their SF was swept over 2 to 5 octaves during each VEP trial
Psychology & Neuroscience. Publicado em: 2009-12