APPLICATION OF THE SENSITIVITY THEORY IN MICROWAVE MEASUREMENTS

1999 ◽  
Vol 09 (05n06) ◽  
pp. 261-285
Author(s):  
J. LADVÁNSZKY
Keyword(s):  
Reflection Coefficient ◽  
Microwave Measurements ◽  
Calibration Standards ◽  
Theoretical Methods ◽  
Sensitivity Theory

In the measurement of reflection coefficient, inaccuracy of the calibration standards may result in the measurement inaccuracy. It is shown that circuit theoretical methods6 are applicable for the reduction of this kind of measurement inaccuracy. Two methods for the reduction of such measurement inaccuracy are introduced and verified in examples.

An Accurate Operation of Wideband Multi-Port Reflectometer with New Calibration Method implementing Least Mean Square for Microwave Imaging Application

2015 ◽  
Vol 73 (3) ◽  
Author(s):  
Rashidah Che Yob ◽  
Norhudah Seman
Keyword(s):  
Reflection Coefficient ◽  
Calibration Method ◽  
Weight Coefficient ◽  
Calibration Procedure ◽  
Microwave Imaging ◽  
Mean Square ◽  
Least Mean Square ◽  
Calibration Standards ◽  
Imaging Application ◽  
Coefficient Measurement

The wideband operation of multi-port reflectometer may lead to inaccurate reflection coefficient measurement caused by the overlapped phase characteristics of the used calibration standards. Therefore, a calibration procedure implementing Least Mean Square (LMS) is proposed to offer accurate operation of wideband multi-port reflectometer from 1 to 6 GHz. Its well wideband performance is verified by attenuators of 3, 6 and 10 dB that assessed as the device under tests (DUTs). The proposed LMS contains a learning rate, m and updated weight coefficient, W(k+1) to eliminate error and achieve the corrected reflection coefficient of DUT.

Quantification of Silica Uptake by Alveolar Macrophages - An Emperical Scanning Electron Microprobe Method

1982 ◽  
Vol 40 ◽  
pp. 332-333
Author(s):  
V. V. Damiano ◽  
R. P. Daniele ◽  
H. T. Tucker ◽  
J. H. Dauber
Keyword(s):  
Quantitative Analysis ◽  
Alveolar Macrophages ◽  
Bulk Sample ◽  
Silica Particles ◽  
Empirical Method ◽  
Phagocytic Cells ◽  
Calibration Standards ◽  
X Ray ◽  
Accurate Quantitative Analysis ◽  
Scanning Electron

An important example of intracellular particles is encountered in silicosis where alveolar macrophages ingest inspired silica particles. The quantitation of the silica uptake by these cells may be a potentially useful method for monitoring silica exposure. Accurate quantitative analysis of ingested silica by phagocytic cells is difficult because the particles are frequently small, irregularly shaped and cannot be visualized within the cells. Semiquantitative methods which make use of particles of known size, shape and composition as calibration standards may be the most direct and simplest approach to undertake. The present paper describes an empirical method in which glass microspheres were used as a model to show how the ratio of the silicon Kα peak X-ray intensity from the microspheres to that of a bulk sample of the same composition correlated to the mass of the microsphere contained within the cell. Irregular shaped silica particles were also analyzed and a calibration curve was generated from these data.

Reinforcement Sensitivity Theory of Personality Questionnaire--Dutch Version

2020 ◽  
Author(s):  
Serafine Dierickx ◽  
Dirk Smits ◽  
Philip J. Corr ◽  
Penelope Hasking ◽  
Laurence Claes
Keyword(s):  
Personality Questionnaire ◽  
Reinforcement Sensitivity Theory ◽  
Dutch Version ◽  
Sensitivity Theory ◽  
Reinforcement Sensitivity
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