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Author (Last Name): johnson
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Displaying records 191 to 200 of 440 records.
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191. Modeling Distributed Kinetics in Isolated Semiconductor Quantum Dots
Published: 3/1/2003
Authors: M Kuno, D P Fromm, S T Johnson, Alan Gallagher, David J Nesbitt
Abstract: tailed modeling of recently observed nonexponential fluorescence intermittency in colloidal semiconductor quantum dots (QDs) is presented. In particular, experiments have shown that both on-time and off-time probability densities generated from sin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842276

192. Radiometric Characterization and Absolute Calibration of the Marine Optical System (MOS) Bench Unit
Published: 3/1/2003
Authors: C Habauzit, Steven W Brown, Keith R Lykke, Bettye C Johnson, M Feinholz, M Yarbrough, D K Clark
Abstract: The Marine Optical Spectrograph (MOS) is a dual CCD-based spectrograph system developed for in-water measurements of down-welling solar irradiance, {Epsilon}^dd^, and up-welling radiance, L^du^. These measurements are currently used in the calibratio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841585

193. Uncertainty Budgets For Realisation of Scales By Radiation Thermometry
Published: 3/1/2003
Authors: J Fischer, M Battuello, M Sadli, M Ballico, S N Park, P Saunders, Y Zundong, Bettye C Johnson, E Van der Ham, W Li, F Sakuma, Graham Machin, N Fox, S Ugur, M Matveyev
Abstract: Some recent international comparisons and the preliminary results of the key comparison CCT-K5 evidenced that the realisation of theITS-90 above the freezing point of silver and its dissemination with tungsten strip lamps may be less straightforward ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841719

194. Comparison of Cryogenic Radiometry and Thermal Radiometry Calibrations at NIST Using Multichannel Filter Raidometers
Published: 2/1/2003
Authors: Bettye C Johnson, Steven W Brown, Keith R Lykke, Charles E Gibson, G Fargion, G Meister, S B. Hooker, B L Markham, James J. Butler
Abstract: Comparison of independent measurement results allows an assessment of the accuracy of the underlying methods. In this work, four multichannel filter radiometers were calibrated using tunable laser-illuminated and lamp-illuminated integrating sphere ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841690

195. Design and Uncertainty Analysis for a PVTt Gas Flow Standard
Series: Journal of Research (NIST JRES)
Published: 2/1/2003
Authors: John D Wright, Aaron N Johnson, Michael R Moldover
Abstract: A new pressure, volume, temperature, and time (PVTt) primary gas flow standard has been constructed at the National Institute of Standards and Technology with an expanded uncertainty of between 0.02 % and 0.05 % (k = 2). The standard covers a flow ra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830785

196. Simbad A Calibration Using a Laser Based Facility and Comparison With Previous Techniques
Published: 2/1/2003
Authors: N Souaidia, Steven W Brown, Bettye C Johnson
Abstract: Two multi-channel filter radiometers were calibrated using three different techniques: against a lamp-illuminated integrating sphere source, against a laser-illuminated integrating sphere source and by cross-calibration against a primary sun photomet ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841694

197. Stray-Light Correction Algorithm for Spectrographs
Published: 2/1/2003
Authors: Steven W Brown, Bettye C Johnson, M Feinholz, M Yarbrough, S Flora, Keith R Lykke, D K Clark
Abstract: In this work, we describe an algorithm to correct a spectrograph's response for stray light. Two recursion relations are developed: one to correct the system response when measuring broad-band calibration sources and a second to correct the response ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841618

198. A Comparison of Laser-Based and Conventional Calibrations of Sun Photometers
Published: 1/1/2003
Authors: N Souaidia, C Pietras, G Fargion, R A Barnes, R Frouin, Keith R Lykke, Bettye C Johnson, Steven W Brown
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104764

199. A Comparison of Laser-Based and Conventional Calibrations of Sun Photometers, ed. by G.S. Fargion and C.R. McClain
Published: 1/1/2003
Authors: N Souaidia, C Pietras, Steven W Brown, Bettye C Johnson, G Fargion
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104765

200. A Portable Integrating Sphere Source for the Earth Observing System's Calibration Validation Program
Published: 1/1/2003
Authors: Steven W Brown, Bettye C Johnson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101326



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