Results 11 to 20 of about 6,842 (303)

Optical refraction detection method for emulsion concentration

open access: yesMeikuang Anquan, 2021
This paper introduced three kinds of emulsion concentration detection schemes based on optical refraction, and the prism internal reflection method is chosen as the detection method. Several kinds of emulsions were prepared, their refractive indexes were
LUO Tienan
doaj   +1 more source

Estimation of refractivity uncertainties and vertical error correlations in collocated radio occultations, radiosondes, and model forecasts [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
Random uncertainties and vertical error correlations are estimated for three independent data sets. The three collocated data sets are (1) refractivity profiles of radio occultation measurements retrieved from the Metop-A and B and COSMIC-1 missions, (2) 
J. K. Nielsen   +3 more
doaj   +1 more source

Refraction in Media with a Negative Refractive Index [PDF]

open access: yesPhysical Review Letters, 2003
5 pages, 4 figures, submitted to Phys.
Foteinopoulou, S.   +2 more
openaire   +3 more sources

The Retrieval of Wet Refractivity Index by Tomography Using Spherical Cap Harmonics [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2022
In this research, three-dimensional and four-dimensional tomography is used to demonstrate the distribution of wet refractivity index of the troposphere.
Masoud Dehvari   +2 more
doaj   +1 more source

Global analysis of atmospheric refractivity profiles from COSMIC GPS radio occultation soundings [PDF]

open access: yesGeodetski Vestnik, 2020
Atmospheric refractivity is a function of temperature, pressure and water vapor. The refractivity retrieved from the Global Navigation Satellite Systems (GNSS) radio occultation soundings has fine vertical resolution and high accuracy, so it can be used ...
Shaoqi Gong   +4 more
doaj   +1 more source

Refractive Index Quality Control and Comparative Analysis of Multi-source Occultation Based on Sounding Observation

open access: yes应用气象学报, 2020
Three occultation refractive index data of COSMIC, Metop-A and FY-3C from 1 September 2017 to 31 August 2018 are divided into four climate zones according to climate characteristics, so that the dataset is more consistent with the normal distribution ...
Guo Qiyun   +3 more
doaj   +1 more source

Statistics of Radio Refractivity Derived from Prague Radiosounding Data

open access: yesRadioengineering, 2003
Vertical gradient of radio refractivity in the lowest 100 m isderived from the meteorological radio-sounding data of the Prague-Libusstation. The data cover the measurements at the terms 00, 06, 12, and18UTC, and the extent of data is 20 years.
L. Ramon Saez, O. Fiser, D. Rezacova
doaj   +1 more source

Study of an Atmospheric Refractivity Estimation from a Clutter Using Genetic Algorithm

open access: yesApplied Sciences, 2022
In this paper, a method for estimating atmospheric refractivity from sea and land clutters is proposed. To estimate the atmospheric refractivity, clutter power spectrums based on an artificial tri-linear model are calculated using an Advanced Refractive ...
Doyoung Jang   +3 more
doaj   +1 more source

Uniform refraction in negative refractive index materials [PDF]

open access: yesJournal of the Optical Society of America A, 2015
We study the problem of constructing an optical surface separating two homogeneous, isotropic media, one of which has a negative refractive index. In doing so, we develop a vector form of Snell's law, which is used to study surfaces possessing a certain uniform refraction property, both in the near and far field cases. In the near field problem, unlike
Stachura, Eric, Gutirrez, Cristian E.
openaire   +3 more sources

Leflunomide as a potential second-line drug in the treatment of sarcoidosis

open access: yesТуберкулез и болезни лёгких, 2019
Sarcoidosis is systemic granulomatosis of an unknown nature, the course of which varies from spontaneous remission to progression resulting in failure of organs and systems.
A. A. Vizel, I. Yu. Vizel
doaj   +1 more source

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