In-situ measurements with fibre Bragg gratings embedded in stainless steel

2014 ◽  
Author(s):  
Dirk Havermann ◽  
Jinesh Mathew ◽  
William N. MacPherson ◽  
Robert R. J. Maier ◽  
Duncan P. Hand
Keyword(s):  
Stainless Steel ◽  
Bragg Gratings ◽  
In Situ Measurements ◽  
Fibre Bragg Gratings

In-Situ Measurements of Load Partitioning in a Metastable Austenitic Stainless Steel: Neutron and Magnetomechanical Measurements

2012 ◽  
Vol 43 (12) ◽  
pp. 4601-4609 ◽  
Author(s):  
David Maréchal ◽  
Chad W. Sinclair ◽  
Philippe Dufour ◽  
Pascal J. Jacques ◽  
Jean-Denis Mithieux
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
In Situ Measurements ◽  
Metastable Austenitic Stainless Steel

INEXPENSIVE THERMISTOR SENSORS FOR TEMPERATURE MEASUREMENTS IN ORGANIC SOILS

1981 ◽  
Vol 61 (3) ◽  
pp. 521-524
Author(s):  
JAMES A. CAMPBELL ◽  
LOUISE FRASCARELLI
Keyword(s):  
Stainless Steel ◽  
Soil Temperature ◽  
Organic Soil ◽  
In Situ Measurements ◽  
Temperature Measurements ◽  
Organic Soils

Thermistors were incorporated in stainless steel tubular probes and in CPVC epoxy-filled pioe for accurate periodic and continuous in situ measurements of temperature in organic soil. Temperature can be measured with ± 0.1 °C with portable analog meters and ± 0.01 °C with digital meters.

Fibre Bragg Gratings in Harsh and Space Environments: Principles and applications

2019 ◽  
Author(s):  
Brahim Aissa ◽  
Emile I. Haddad ◽  
Roman V. Kruzelecky ◽  
Wes R. Jamroz
Keyword(s):  
Bragg Gratings ◽  
Space Environments ◽  
Fibre Bragg Gratings

In-Situ Observation and Acoustic Emission Analysis for Corrosion Pitting of MgCl2 Droplet in SUS304 Stainless Steel

2012 ◽  
Vol 53 (6) ◽  
pp. 1069-1074 ◽  
Author(s):  
Mitsuharu Shiwa ◽  
Hiroyuki Masuda ◽  
Hisashi Yamawaki ◽  
Kaita Ito ◽  
Manabu Enoki
Keyword(s):  
Stainless Steel ◽  
Acoustic Emission ◽  
Emission Analysis ◽  
Sus304 Stainless Steel ◽  
Corrosion Pitting ◽  
Acoustic Emission Analysis

The Carbon:²³⁴Thorium ratios of sinking particles in the California Current Ecosystem 2: Examination of a thorium sorption, desorption, and particle transport model

2019 ◽  
Author(s):  
Michael Stukel ◽  
Thomas Kelly
Keyword(s):  
Organic Carbon ◽  
Water Column ◽  
Particulate Organic Carbon ◽  
Transport Model ◽  
California Current ◽  
In Situ Measurements ◽  
Power Law Distribution ◽  
Sinking Particles ◽  
Organic Carbon Concentration

Thorium-234 (234Th) is a powerful tracer of particle dynamics and the biological pump in the surface ocean; however, variability in carbon:thorium ratios of sinking particles adds substantial uncertainty to estimates of organic carbon export. We coupled a mechanistic thorium sorption and desorption model to a one-dimensional particle sinking model that uses realistic particle settling velocity spectra. The model generates estimates of 238U-234Th disequilibrium, particulate organic carbon concentration, and the C:234Th ratio of sinking particles, which are then compared to in situ measurements from quasi-Lagrangian studies conducted on six cruises in the California Current Ecosystem. Broad patterns observed in in situ measurements, including decreasing C:234Th ratios with depth and a strong correlation between sinking C:234Th and the ratio of vertically-integrated particulate organic carbon (POC) to vertically-integrated total water column 234Th, were accurately recovered by models assuming either a power law distribution of sinking speeds or a double log normal distribution of sinking speeds. Simulations suggested that the observed decrease in C:234Th with depth may be driven by preferential remineralization of carbon by particle-attached microbes. However, an alternate model structure featuring complete consumption and/or disaggregation of particles by mesozooplankton (e.g. no preferential remineralization of carbon) was also able to simulate decreasing C:234Th with depth (although the decrease was weaker), driven by 234Th adsorption onto slowly sinking particles. Model results also suggest that during bloom decays C:234Th ratios of sinking particles should be higher than expected (based on contemporaneous water column POC), because high settling velocities minimize carbon remineralization during sinking.

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