Simplified Method for the In Situ Collection and Laboratory Analysis of Cosmogenic Tracers (Sulfur-35 and Sodium-22) to Determine Residence Time Distributions and Water Ages

2021 ◽  
Author(s):  
Amanda L. Deinhart ◽  
Richard K. Bibby ◽  
Ate Visser ◽  
Melissa Thaw ◽  
Keenan Thomas
Keyword(s):  
Residence Time ◽  
Laboratory Analysis ◽  
Simplified Method ◽  
Residence Time Distributions ◽  
In Situ Collection

In-situ measurement of residence time distributions in a turbulent oxy-fuel gas-flame combustor

2017 ◽  
Vol 58 (7) ◽  
Author(s):  
Sebastian Bürkle ◽  
Lukas G. Becker ◽  
Maria Angela Agizza ◽  
Andreas Dreizler ◽  
Volker Ebert ◽  
...  
Keyword(s):  
Residence Time ◽  
In Situ Measurement ◽  
Fuel Gas ◽  
Residence Time Distributions ◽  
Gas Flame

Residence time distributions in SX–EW equipment

1998 ◽  
Vol 54 (3-4) ◽  
pp. 235-242 ◽  
Author(s):  
Hossein Aminian ◽  
Claude Bazin ◽  
Daniel Hodouin
Keyword(s):  
Residence Time ◽  
Residence Time Distributions

Assessment of the range of variation of Nγ from 60 estimation methods for footings on sand

2013 ◽  
Vol 50 (7) ◽  
pp. 793-800 ◽  
Author(s):  
Edgar Giovanny Diaz-Segura
Keyword(s):  
Friction Angle ◽  
Standard Penetration Test ◽  
Estimation Methods ◽  
Penetration Test ◽  
In Situ Tests ◽  
Vertical Loading ◽  
Simplified Method ◽  
Bearing Capacity Factor ◽  
Range Of Variation

The range of variation of the bearing capacity factor, Nγ, was assessed using 60 estimation methods for rough footings on sand subjected to static vertical loading. The influence on the Nγ values of the use of correlations for the estimation of the friction angle, [Formula: see text], derived from in situ tests was also assessed. The analysis shows a marked dependency on the methods used to determine Nγ, showing differences for the same [Formula: see text] values of up to 267% between estimated values. Uncertainty in the estimation of [Formula: see text], due to the use of correlations with in situ tests, leads to a range of variation for Nγ higher than that seen using the 60 estimation methods. Finally, given the regular use of the in situ standard penetration test (SPT) on sands, and based on a series of analyses using finite elements, a simplified method in terms of the SPT N-values is proposed for estimation of Nγ in footings on sands.

Gamma-ray spectrometer calibration for field analysis of thorium, uranium and potassium

1970 ◽  
Vol 7 (4) ◽  
pp. 1093-1098 ◽  
Author(s):  
P. G. Killeen ◽  
C. M. Carmichael
Keyword(s):  
Regression Analysis ◽  
Gamma Ray ◽  
Laboratory Analysis ◽  
In Situ Analysis ◽  
Field Analysis ◽  
Gamma Ray Spectrometer ◽  
Nonlinear Relation ◽  
Using Data ◽  
Spectrometer Calibration

The calibration of a portable three-channel gamma-ray spectrometer for in situ analysis of thorium, uranium, and potassium is discussed. A method of regression analysis is suggested as the best means of including all of the data available from the calibration stations. Calibration indicates a nonlinear relation between count rates obtained in the field and concentrations in parts per million obtained from laboratory analysis. The range of radioelement content must be taken into consideration and appropriate sets of calibration constants applied. As an example of the method, calibration constants are calculated for a portable gamma-ray spectrometer using data for the Blind River uranium region of Ontario.

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