Determination of optical radiation attenuation in dispersed system «coal dust-air»

2015 ◽  
Author(s):  
Sergey A. Lisakov ◽  
Julia L. Mikhanoshina ◽  
Andrey N. Pavlov ◽  
Eugene V. Sypin ◽  
Gennady V. Leonov
Keyword(s):  
Optical Radiation ◽  
Coal Dust ◽  
Radiation Attenuation ◽  
Dispersed System

scholarly journals Application of Optical Spectrophotometry for Analysis of Radiation Spectrum Emitted by Electric Arc in the Air

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Michał Kozioł ◽  
Daria Wotzka ◽  
Tomasz Boczar ◽  
Paweł Frącz
Keyword(s):  
Optical Radiation ◽  
Radiation Spectrum ◽  
Electric Arc ◽  
Structural Defects ◽  
Constant Voltage ◽  
Copper Electrodes ◽  
Measurement And Analysis ◽  
Low Energies ◽  
Optical Spectrophotometry

This paper presents the results of measurement and analysis of optical radiation emitted by a free burning electric arc. The aim was to determine the application possibilities of optical spectrophotometry for detection of electric arcs. The research works considered electric arc generated with a constant voltage supply between two copper electrodes in the air, carried out under laboratory conditions. A high resolution optical spectrophotometer was used for registration of optical radiation. The analyses involved determination of two dimensionless descriptors obtained for the gathered spectra. Moreover, for each of the registered intensity distributions, the energy values were calculated for three frequency ranges. Based on the measured signals, the possibility of application of spectrophotometry for the optical radiation analysis was confirmed. The analysis indicated that the most energy of optical radiation is detected for the range of 200–780 nm, while above 780 nm almost no optical energy is emitted. Spectrophotometric studies performed in the UV-NIR range are of interest since one can obtain information about the structural defects (at lower wavebands) or impurities and/or point defects (at low energies bands). It was also stated that the obtained descriptors may be applied for diagnosis and identification of electric arc purposes.

scholarly journals Determination of Radiation Attenuation Coefficients of Concretes in Different Densities

2013 ◽  
Vol 123 (2) ◽  
pp. 374-375 ◽  
Author(s):  
İ. Akkurt ◽  
K. Günoğlu ◽  
C. Başyiğit ◽  
A. Akkaş
Keyword(s):  
Attenuation Coefficients ◽  
Radiation Attenuation

Determination Of Efficient Modes Of Optical Radiation Exposure For Control Of Human Circadian Activity

2020 ◽  
pp. 118-126
Author(s):  
Alexander V. Leonidov
Keyword(s):  
Optical Radiation ◽  
Experimental Studies ◽  
Short Wave ◽  
Circadian Activity ◽  
Solar Altitude ◽  
Method Of Determination ◽  
Long Wave ◽  
Efficient Control ◽  
Spectral Channels

The article describes the stages of transformation of the direct and diffused components of solar radiation in the short-wave and long-wave spectral channels of the human circadian activity control path. The method of determination of the dependences of irradiance on Solar altitude angle as well as the values of radiant exposure in the circadian region of the optical spectre required for efficient control of human circadian activity. An example of utilisation of the developed method is provided. Correspondence between the results of calculations based onthe proposed method and the results of independent experimental studies is demonstrated. The developed method allows us to formulate major light-engineering requirements to characteristics of emitting installations controlling human circadian activity, preventing and eliminating its deregulations.

Determination of airborne coal dust size-consist in the stopes of Kuzbass coal mines

2019 ◽  
Vol 4 (6) ◽  
pp. 120-130
Author(s):  
A.V. Kornev ◽  
◽  
G.I. Korshunov ◽  
M.V. Korneva ◽  
◽  
...  
Keyword(s):  
Coal Dust ◽  
Coal Mines
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