Application of a theorem by bright to the generalized tracer system

1977 ◽  
Vol 39 (2) ◽  
pp. 167-178 ◽  
Author(s):  
Per-Erik E. Bergner
Keyword(s):  
Tracer System

scholarly journals Railway track tracer system for creature detection

2021 ◽  
Vol 1055 (1) ◽  
pp. 012041
Author(s):  
M Deepa ◽  
C G Raji ◽  
VA Ajina ◽  
Ashla ◽  
Afsal Azra ◽  
...  
Keyword(s):  
Railway Track ◽  
Tracer System

scholarly journals Sulphur accumulation and redistribution in wheat (Triticum aestivum): a study using stable sulphur isotope ratios as a tracer system

1999 ◽  
Vol 22 (7) ◽  
pp. 831-839 ◽  
Author(s):  
J. M. Monaghan ◽  
C. M. Scrimgeour ◽  
W. M. Stein ◽  
F. J. Zhao ◽  
E. J. Evans
Keyword(s):  
Triticum Aestivum ◽  
Isotope Ratios ◽  
Sulphur Isotope ◽  
Tracer System

scholarly journals An airborne perfluorocarbon tracer system and its first application for a Lagrangian experiment

2014 ◽  
Vol 7 (7) ◽  
pp. 6791-6822
Author(s):  
Y. Ren ◽  
R. Baumann ◽  
H. Schlager
Keyword(s):  
Stratospheric Ozone ◽  
Lagrangian Model ◽  
Research Vessel ◽  
Gas Chromatography Mass Spectrometry ◽  
Sampling System ◽  
Tracer System ◽  
Research Aircraft ◽  
Set Up ◽  
German Aerospace ◽  
First Time

Abstract. A perfluorocarbon tracer system (PERTRAS), specifically designed for Lagrangian aircraft experiments, has been developed by the Deutsches Zentrum für Luft- und Raumfahrt (German Aerospace Center, DLR). It consists of three main parts: a tracer release unit (RU), an adsorption tube sampler (ATS) and a tracer analytical system. The RU was designed for airborne tracer release experiments; meanwhile, it can be used on various platforms for different experimental purpose (here research vessel). PERTRAS was for the first time applied in the field campaign Stratospheric ozone: halogen Impacts in a Varying Atmosphere (SHIVA) in November 2011. An amount of 8.8 kg perfluoromethylcyclopentane (PMCP) was released aboard the research vessel Sonne (RV Sonne) near the operational site of this campaign, Miri, Malaysia, on 21 November. The tracer samples collected using the ATS on board the DLR research aircraft Falcon were analyzed in the laboratory using a thermal desorber/gas chromatography/mass spectrometry (TD/GC/MS) system. Guided by forecasts calculated with the Lagrangian model, Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT), 64 tracer samples were collected onboard the Falcon approximately 5 and 25 h after the release, respectively, mostly with a time resolution of 1 min. Enhanced PMCP concentrations relative to ambient PMCP background values (mean: 6.62 fmol mol−1) were detected during three intersects of the fresh tracer plume (age 5 h), with a maximum value of 301.33 fmol mol−1. This indicates that the fresh tracer plume was successfully intercepted at the forecasted position. During the second flight, 25 h after the release, the center of tracer plume was not detected by the sampling system due to a faster advection of the plume than forecasted. The newly developed PERTRAS system has been successfully deployed for the first time. The instrumental set-up and comparisons between the measurements and HYSPLIT simulations are presented in this study.

Application of a nuclear quadrupole resonance method to measure stress in a matrix-tracer system in composites

1997 ◽  
Vol 23 (5) ◽  
pp. 339-340
Author(s):  
N. E. Ainbinder ◽  
A. S. Azheganov ◽  
V. P. Begishev ◽  
N. K. Shestakova
Keyword(s):  
Nuclear Quadrupole Resonance ◽  
Resonance Method ◽  
Tracer System ◽  
Quadrupole Resonance ◽  
Nuclear Quadrupole

On the solution of the compartmentalized tracer system

1960 ◽  
Vol 20 (3) ◽  
pp. 579-580 ◽  
Author(s):  
P.-E.E. Bergner
Keyword(s):  
Tracer System
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