scholarly journals Quantum Pontryagin principle under continuous measurements

2020 ◽  
Vol 61 (10) ◽  
pp. 102203
Author(s):  
J. I. Mulero-Martínez ◽  
J. Molina-Vilaplana
Keyword(s):  
Pontryagin Principle ◽  
Continuous Measurements

Continuous measurements of aerosol properties at the Baltic Sea

Tellus B ◽  
2007 ◽  
Vol 59 (4) ◽  
Author(s):  
C. Engler ◽  
H. Lihavainen ◽  
M. Komppula ◽  
V.-M. Kerminen ◽  
M. Kulmala ◽  
...  
Keyword(s):  
Baltic Sea ◽  
The Baltic Sea ◽  
Continuous Measurements ◽  
The Baltic ◽  
Aerosol Properties

scholarly journals Quality Dating: A Well-Defined Protocol Implemented at ETH for High-Precision 14C-Dates Tested on Late Glacial Wood

Radiocarbon ◽  
2019 ◽  
Vol 62 (4) ◽  
pp. 891-899 ◽  
Author(s):  
Adam Sookdeo ◽  
Bernd Kromer ◽  
Ulf Büntgen ◽  
Michael Friedrich ◽  
Ronny Friedrich ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tree Ring ◽  
High Precision ◽  
Accelerator Mass Spectrometry ◽  
Late Glacial ◽  
Tree Ring Chronology ◽  
Continuous Measurements ◽  
Calibration Curves

ABSTRACTAdvances in accelerator mass spectrometry have resulted in an unprecedented amount of new high-precision radiocarbon (14C) -dates, some of which will redefine the international 14C calibration curves (IntCal and SHCal). Often these datasets are unaccompanied by detailed quality insurances in place at the laboratory, questioning whether the 14C structure is real, a result of a laboratory variation or measurement-scatter. A handful of intercomparison studies attempt to elucidate laboratory offsets but may fail to identify measurement-scatter and are often financially constrained. Here we introduce a protocol, called Quality Dating, implemented at ETH-Zürich to ensure reproducible and accurate high-precision 14C-dates. The protocol highlights the importance of the continuous measurements and evaluation of blanks, standards, references and replicates. This protocol is tested on an absolutely dated German Late Glacial tree-ring chronology, part of which is intercompared with the Curt Engelhorn-Center for Archaeometry, Mannheim, Germany (CEZA). The combined dataset contains 170 highly resolved, highly precise 14C-dates that supplement three decadal dates spanning 280 cal. years in IntCal, and provides detailed 14C structure for this interval.

scholarly journals Quantum cooling and squeezing of a levitating nanosphere via time-continuous measurements

2015 ◽  
Vol 17 (7) ◽  
pp. 073019 ◽  
Author(s):  
Marco G Genoni ◽  
Jinglei Zhang ◽  
James Millen ◽  
Peter F Barker ◽  
Alessio Serafini
Keyword(s):  
Continuous Measurements

scholarly journals Characteristics of PM2.5Episodes Revealed by Semi-Continuous Measurements at the Baltimore Supersite at Ponca St

2006 ◽  
Vol 40 (10) ◽  
pp. 845-860 ◽  
Author(s):  
Seung Shik Park ◽  
Jan Kleissl ◽  
David Harrison ◽  
Vijayant Kumar ◽  
Narayanan P. Nair ◽  
...  
Keyword(s):  
Continuous Measurements

Continuous Measurements on Immobilized Cells by a Mass Filter

1978 ◽  
pp. 403-404 ◽  
Author(s):  
J. C. Weaver ◽  
F. M. Reames ◽  
L. DeAlleaume ◽  
C. R. Perley ◽  
C. L. Cooney
Keyword(s):  
Immobilized Cells ◽  
Mass Filter ◽  
Continuous Measurements

scholarly journals Technical note: Assessing gas equilibration systems for continuous <i>p</i>CO<sub>2</sub> measurements in inland waters

2016 ◽  
Vol 13 (13) ◽  
pp. 3915-3930 ◽  
Author(s):  
Tae Kyung Yoon ◽  
Hyojin Jin ◽  
Neung-Hwan Oh ◽  
Ji-Hyung Park
Keyword(s):  
River System ◽  
Fast Response ◽  
Technical Note ◽  
Spatial Variations ◽  
Detection Range ◽  
Measurement Systems ◽  
Co2 Sensor ◽  
Continuous Measurements ◽  
Membrane Biofouling

Abstract. High-frequency continuous measurements of the partial pressure of CO2 (pCO2) are crucial for constraining the spatiotemporal dynamics of CO2 emissions from inland water systems. However, direct measurements of pCO2 are scarce, and no systematic comparisons have been conducted on the suitability of the widely used measurement systems for continuous underway or long-term deployment in various field conditions. We compared spray- and marble-type equilibrators and a membrane-enclosed CO2 sensor to assess their suitability for continuous long-term or underway pCO2 measurements in an urbanized river system in Korea. Both equilibrators had a shorter response time compared with the membrane-enclosed sensor, and could capture large spatial variations of pCO2 during a transect study along a highly urbanized river reach. The membrane-enclosed sensor based on passive equilibration provided comparable underway measurements along the river sections where pCO2 varied within the sensor detection range. When deployed in a eutrophic river site, the membrane-enclosed sensor was able to detect large diel variations in pCO2. However, biofouling on the membrane could reduce the accuracy of the measurement during long deployments exceeding several days. The overall results suggest that the fast response of the equilibrator systems facilitates capturing large spatial variations in pCO2 during short underway measurements. However, the attendant technical challenges of these systems, such as clogging and desiccant maintenance, have to be addressed carefully to enable their long-term deployment. The membrane-enclosed sensor would be suitable as an alternative tool for long-term continuous measurements if membrane biofouling could be overcome by appropriate antifouling measures such as copper mesh coverings.

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