Radiocarbon Analysis on the New AARAMS 1MV Tandetron

Radiocarbon ◽  
2016 ◽  
Vol 59 (3) ◽  
pp. 905-913 ◽  
Author(s):  
Jesper Olsen ◽  
Dmitry Tikhomirov ◽  
Claus Grosen ◽  
Jan Heinemeier ◽  
Matthias Klein
Keyword(s):  
Standard Deviation ◽  
Charge State ◽  
High Energy ◽  
International Standards ◽  
Electrostatic Analyzer ◽  
Consensus Values ◽  
Long Term Performance ◽  
Term Performance

AbstractWe report here on the radiocarbon performance on the AARAMS HVE 1MV Tandetron. 14C analysis is carried out in charge state 2+. We have avoided Li interference by appropriate settings of the high-energy electrostatic analyzer and the 30° second high-energy magnet. The 14C machine background is determined using unprocessed graphite, which yielded 58,650±2032 14C yr determined as the average and standard deviation of four measurements. International standards, which are used to monitor the long-term performance of the 14C measurements, agree with the reported consensus values.

Performance of Elastomers in Isolation Bearings: A Literature Review

1992 ◽  
Vol 8 (2) ◽  
pp. 279-303 ◽  
Author(s):  
Andrew W. Taylor ◽  
Albert N. Lin ◽  
Jonathan W. Martin
Keyword(s):  
Seismic Isolation ◽  
Base Isolation ◽  
The United States ◽  
High Energy ◽  
Laboratory Findings ◽  
Elastomeric Bearings ◽  
Performance Requirements ◽  
Long Term Performance ◽  
Term Performance

Laminated elastomeric bearings have been used for about 30 years in the United States to isolate bridge substructures from the lateral forces induced by shrinkage and creep of their superstructures. More recently, elastomeric bearings have been increasingly employed in buildings and bridges as a means of decoupling the structure from seismic ground motions. Since most buildings and bridges have service lives of at least 30 to 60 years, questions about the long-term behavior of base-isolation bearings arise. This paper presents a review of literature relating to the long term performance of the elastomers used in seismic isolation bearings. Bearing performance requirements are discussed and material characteristics and fabrication procedures are outlined. Field experience and laboratory findings are reviewed. Finally, long-term environmental effects are discussed, including ozone degradation, corrosion, temperature effects, and the influence of bombardment of elastomers by high energy radiation.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance

Long-term performance of the Hancock bioprosthetic conduit for aortic root replacement

2008 ◽  
Vol 56 (S 1) ◽  
Author(s):  
CC Badiu ◽  
W Eichinger ◽  
D Ruzicka ◽  
I Hettich ◽  
S Bleiziffer ◽  
...  
Keyword(s):  
Aortic Root ◽  
Aortic Root Replacement ◽  
Long Term Performance ◽  
Term Performance
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