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Variable dose rate application of herbicides using optical sensors
(2005-12-01)
The aim of this study was to develop and evaluate a variable dose rate application of herbicides using an online electronic control based system with optical sensors for weed detection in forested areas. The proposed concept ...
Optical flow structure effects in children's postural control
(2016-06-01)
The aim of this study was to investigate the effect of distance and optic flow structure on visual information and body sway coupling in children and young adults. Thirty children (from 4 to 12 years of age) and 10 young ...
Characterization of a thin-film metal-coated fiber optical phase modulator based on thermal effect with a nonlinear control interferometer
(2021-09-01)
In this work, an optical fiber was coated by a thin-film metal layer to work as a fiber optical phase modulator based on thermal effect. This device was assembled in one of the arms of an all-fiber Michelson interferometer ...
Comparison between vegetation indices for detecting spatial and temporal variabilities in soybean crop using canopy sensors
(2020-10-01)
Crop monitoring through remote sensing techniques enable greater knowledge of average variability in crop growth. Canopy sensors help provide information on the variability of crop through the use of vegetation indices. ...
Glint removal assessment to estimate the remote sensing reflectance in inland waters withwidely differing optical Properties
(2018-10-01)
The quality control of remote sensing reflectance (Rrs) is a challenging task in remote sensing applications, mainly in the retrieval of accurate in situ measurements carried out in optically complex aquatic systems. One ...
Variable dose rate application of herbicides using optical sensors
(Wageningen Academic Publishers, 2014)
Closed loop interferometry: innovative proposals for optical phase detection by using modern control approaches
(Universidade Estadual Paulista (Unesp), 2022-02-04)
Neste trabalho apresentamos um sistema de controle não linear aplicado ao interferômetro óptico de dois feixes, operando com abordagem de alto ganho (compensação total de fase interferométrica), a fim de converter a curva ...