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Author: howard yoon
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Displaying records 31 to 40 of 121 records.
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31. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914149

32. Dispersive Methods
Published: 7/1/2014
Authors: Arnold A. Gaertner, Howard W Yoon, Thomas Avery Germer
Abstract: Chapter 3 will discuss dispersive means of obtaining spectral resolution in spectrophotometry. These methods are used to spatially disperse or separate the various wavelengths of optical electromagnetic radiation to enable analysis of material proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915685

33. Evaluation of Thermal Imaging Cameras
Published: 10/1/2008
Authors: Francine K. Amon, Andrew J. Lock, Nelson P Bryner, Joseph Paul Rice, Howard W Yoon
Abstract: Four thermal infrared cameras that were provided by Bureau of Industry and Security (BIS) to NIST were each evaluated by the NIST Optical Technology Division (OTD) for three metrics: Noise-equivalent Temperature Difference (NETD), Minimum Detectable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900887

34. Extension of the NIST spectral power-responsivity calibration service to 2500 nm
Published: 3/2/2012
Authors: George P Eppeldauer, Howard W Yoon, Jinan Zeng, Thomas C Larason, Jeanne M Houston, Vladimir Khromchenko
Abstract: The National Institute of Standards and Technology (NIST) is working to extend the upper wavelength limit of the spectral power-responsivity calibration service from 1800 nm to 2500 nm. This extension is based on extended-InGaAs (EIGA) transfer- and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910010

35. Extension of the NIST spectral responsivity scale to the infrared using improved-NEP pyroelectric detectors
Published: 6/2/2009
Authors: George P Eppeldauer, Jinan Zeng, Howard W Yoon, Boris Wilthan, Thomas C Larason, Leonard M Hanssen
Abstract: Routine NIST spectral responsivity calibrations are needed for the infrared range. Low NEP pyroelectric radiometers have been developed for traditional monochromator applications to extend the responsivity scale to the infrared. After NEP tests, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900961

36. FASCAL 2: A New NIST Facility for the Calibration of the Spectral Irradiance of Sources
Published: 2/1/2003
Authors: Howard W Yoon, J E Proctor, Charles E Gibson
Abstract: The Facility for Automated Spectroradiometric Calibrations (FASCAL) is the primary facility for spectral irradiance and spectral radiance calibrations at NIST and has been in continous use since the early 1970's. Due to the increasing demands for sp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841660

37. FASCAL 2: A New NIST Facility for the Spectral Irradiance Calibrations of Sources
Published: 1/1/2003
Authors: Howard W Yoon, J E Proctor, Charles E Gibson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104270

38. Fast and Reliable Spectral Response Measurements of PV Cells Using Light Emitting Diodes
Published: 1/1/2014
Authors: Behrang H Hamadani, John F Roller, Brian P Dougherty, Howard W Yoon
Abstract: We present a measurement system for absolute differential spectral responsivity of solar cells based on high-powered LED arrays coupled to an optical light guide capable of large area illumination. Two different measurement techniques were developed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913952

39. Flow Visualization of Heated CO2 Gas Using Thermal Imaging
Published: Date unknown
Authors: Howard W Yoon, Joseph Paul Rice, John G Gillen
Abstract: Walk-through portal detection systems are being developed to screen passengers for the presence of explosives in support of homeland security. These portals utilize a series of air-jets to remove the explosive particles for detection using ion mobil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841020

40. Flow visualization of heated CO2 gas using thermal imaging
Published: 1/1/2006
Authors: Joseph Paul Rice, Howard W Yoon, M H Brenner, N R Briggs, J G Gillen
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104135



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