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An Experiment on Averaging in Extinction Measurements
Author(s) -
Riebel Ulrich
Publication year - 1998
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/(sici)1521-4117(199812)15:6<251::aid-ppsc251>3.0.co;2-v
Subject(s) - extinction (optical mineralogy) , volume (thermodynamics) , signal (programming language) , transmission (telecommunications) , radiation , materials science , optics , environmental science , statistics , physics , mathematics , thermodynamics , computer science , telecommunications , programming language
The discrete nature of particles leads to fluctuations, in both space and time, of the radiation transmitted through a disperse system. The result of a transmission or extinction measurement is commonly expressed, however, as an average value and consecutively converted to a concentration measurement. The experiment discussed here shows that different concentration measures (volume concentration and surface concentration) can be obtained from the same measurement, depending on which level of the signal treatment the averaging procedure is introduced.