Spectral Sensitivity
Mostrando 1-12 de 132 artigos, teses e dissertações.
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1. Rapid Recognizing the Producing Area of a Tobacco Leaf Using Near-Infrared Technology and a Multi-Layer Extreme Learning Machine Algorithm
A novel recognition method was put forward to identify the producing areas of the flue-cured tobacco leaves rapidly and non-destructively by using a near-infrared (NIR) spectrometer and a multi-layer-extreme learning machine (ML-ELM) algorithm. In contrast to traditional linear discriminant analysis (LDA) and extreme learning machine (ELM) algorithms, the ac
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Resting spontaneous baroreflex sensitivity and cardiac autonomic control in anabolic androgenic steroid users
OBJECTIVES: Misuse of anabolic androgenic steroids in athletes is a strategy used to enhance strength and skeletal muscle hypertrophy. However, its abuse leads to an imbalance in muscle sympathetic nerve activity, increased vascular resistance, and increased blood pressure. However, the mechanisms underlying these alterations are still unknown. Therefore, w
Clinics. Publicado em: 21/05/2018
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3. Optimization of structures subjected to dynamic load: deterministic and probabilistic methods
Abstract This paper deals with the deterministic and probabilistic optimization of structures against bending when submitted to dynamic loads. The deterministic optimization problem considers the plate submitted to a time varying load while the probabilistic one takes into account a random loading defined by a power spectral density function. The correlation
REM, Int. Eng. J.. Publicado em: 2016-09
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4. Reticular pattern detection in dermoscopy: an approach using Curvelet Transform
Abstract Introduction Dermoscopy is a non-invasive in vivo imaging technique, used in dermatology in feature identification, among pigmented melanocytic neoplasms, from suspicious skin lesions. Often, in the skin exam is possible to ascertain markers, whose identification and proper characterization is difficult, even when it is used a magnifying lens and a
Res. Biomed. Eng.. Publicado em: 07/07/2016
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5. Interval training based on ventilatory anaerobic threshold increases cardiac vagal modulation and decreases high-sensitivity c-reative protein: randomized clinical trial in coronary artery disease
Background: Autonomic dysfunction and inflammatory activity are involved in the development and progression of coronary artery disease (CAD), and exercise training has been shown to confer a cardiovascular benefit. Objective: To evaluate the effects that interval training (IT) based on ventilatory anaerobic threshold (VAT) has on heart rate variability (H
Braz. J. Phys. Ther.. Publicado em: 09/10/2015
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6. Comparison between Ultraviolet and Infrared Spectroscopies for the Simultaneous Multivariate Determination of Pyrantel and Praziquantel
Methods based on multivariate calibration and diffuse reflectance infrared Fourier transform (DRIFT) and ultraviolet (UV) spectroscopies were developed for the simultaneous determination of two veterinary pharmaceutical drugs, pyrantel pamoate and praziquantel, in commercial tablets. The best UV model was obtained with the full spectra, 200-400 nm, and pa
J. Braz. Chem. Soc.. Publicado em: 2015-07
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7. Ultrasound evaluation of obstructive uropathy and its hemodynamic responses in southwest Nigeria
ABSTRACT Purpose: To determine the renal arterial hemodynamic changes induced by obstructive uropathy using Doppler ultrasonography.
Materials and Methods: 60 adult subjects with suspected obstructive uropathy and 60 asymptomatic apparently healthy controls with normal renal ultrasound featur
Int. braz j urol.. Publicado em: 2015-06
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8. Long-term stability decay of standard and regenerated Bragg gratings tailored for high temperature operation
Thermal stability of both standard and regenerated Bragg gratings written in normal and photosensitive optical fibers was accessed. An apparent spectral wavelength stabilization of common gratings with no thermal hysteresis was reached after thermal treatments. However, after a time interval of 5 months, gratings exhibited a shift in the resonance Bragg wave
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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9. Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta / Ultrafast spectroscopy of the luminescent semiconducting polymer MEH-PPV with ultraviolet excitation
The optoelectronics industry is currently undergoing a transition period in which inorganic materials are being replaced by organic materials, oligomers and polymers, in the fabrication of some types of devices. However, factors such as low efficiency and low lifetime prevent polymer based devices on entering the market definitely. The solution of these issu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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10. INFLUÊNCIA DO HIPOTIREOIDISMO GESTACIONAL EXPERIMENTAL SOBRE A FUNÇÃO CARDIOVASCULAR DA PROLE DE RATAS. / INFLUENCE OF EXPERIMENTAL GESTATIONAL HYPOTHYROIDISM ON CARDIOVASCULAR FUNCTION ALONG THE LIFE OF OFFSPRING IN RATS.
Gestational hypothyroidism is a prevalent disorder in pregnant women. We aimed to investigate the impact of experimental gestational hypothyroidism (EGH) on cardiovascular and autonomic nervous systems (ANS) in the offspring of rats. EGH was induced with methimazole (MMI) 0.02% in drinking water from day 9 of gestation until birth. Sixty days old offspring f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/04/2012
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11. Plantar thermography is useful in the early diagnosis of diabetic neuropathy
OBJECTIVES: This study evaluated plantar thermography sensitivity and specificity in diagnosing diabetic polyneuropathy using cardiac tests (heart rate variability) as a reference standard because autonomic small fibers are affected first by this disease. METHODS: Seventy-nine individuals between the ages of 19 and 79 years old (28 males) were evaluated and
Clinics. Publicado em: 2012-12
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12. Metodologia analítica para determinação de esteróis fecais em sedimentos por Cromatografia Líquida de Alta Eficiência
The fecal sterols are considered important indicators of fecal contamination in aquatic environments. Organic compounds are hydrophobic and are associated with the particulate material and can be preserved for a long time with negligible degradation. The relationships between coprostanol and other sterols found in the environment are important to confirm the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011