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Author: howard yoon

Displaying records 41 to 50 of 116 records.
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41. Spectral Radiance Comparisons of Two Blackbodies with Temperatures Determined Using Absolute Detectors and ITS-90 Techniques
Published: 9/1/2003
Authors: Howard W Yoon, Charles E Gibson, J L Gardner
Abstract: For calibrations of spectral irradiance standards, a high-temperature blackbody (HTBB) is used as a source of spectral radiance or irradiance as derived from Planck's radiance law. The temperature of such a blackbody can be determined using radiance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841679

42. The Development and Characterization of an Absolute Pyrometer Calibrated for Radiance Responsivity
Published: 9/1/2003
Authors: David W Allen, Robert D. Saunders, Bettye C Johnson, Charles E Gibson, Howard W Yoon
Abstract: The International Temperature Scale of 1990 (ITS-90), for temperatures above the freezing temperature of silver, is defined with pyrometers which rely upon spectral radiance ratios to one of the silver, gold or copper freezing temperature blackbodies ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841673

43. A Method for Testing the Spectral Responsivity of Infrared Cameras Using Tunable Lasers
Published: 8/1/2003
Authors: Joseph Paul Rice, Keith R Lykke, Howard W Yoon
Abstract: We are developing a technique for accurately measuring spectral responsivity functions of infrared cameras using tunable lasers. We present preliminary results for uniform scenes where tunable infrared lasers illuminate an integrating sphere, diffus ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841716

44. Kolsky Bar With Electrical Pulse Heating of the Sample
Published: 6/1/2003
Authors: Eric Paul Whitenton, Michael Kennedy, Matthew A. Davies, Gerald V. Blessing, Brian S. Dutterer, Richard L. Rhorer, Howard W Yoon, Lyle E Levine, Richard Joel Fields, D Basak, Timothy J Burns
Abstract: The accuracy of simulations for modeling of machining processes is often limited due to insufficient knowledge of the material properties during machining, which can involve strain rates on the order of 104 per second or higher, plus rapid material h ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821995

45. A SURF Beamline for Synchrotron Source-Based Absolute Radiometry
Published: 2/1/2003
Authors: Ping-Shine Shaw, Uwe Arp, Howard W Yoon, Robert D. Saunders, Albert C Parr, Keith R Lykke
Abstract: A new source-based radiometry beamline at Synchrotron Ultraviolet Radiation Facility (SURF III) was constructed recently. The goal of this beamline is to establish a national source standard with wide spectral range from far UVto IR by using the cal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841629

46. 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

47. A Method for Testing the Spectral Responsivity of Infrared Cameras using Tunable Lasers, ed. by G.C. Holst
Published: 1/1/2003
Authors: Joseph Paul Rice, Keith R Lykke, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104727

48. Calibrated Thermal Microscopy of the Tool-Chip Interface in Machining
Published: 1/1/2003
Authors: Matthew A Davies, Howard W Yoon, T L Schmitz, T J Burns, M D Kennedy
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103716

49. Calibrated thermal microscopy of the tool-chp interface in machining
Published: 1/1/2003
Authors: Matthew A. Davies, Howard W Yoon, Tony L Schmitz, Timothy J Burns, Michael Kennedy
Abstract: This paper presents the results of calibrated, microscopic measurement of the temperature fields at the tool-chip interface during the steady-state, orthogonal machining of AISI 1045 steel. The measurement system consists of a nearly diffraction lim ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821886

50. Constitutive Model Data for Machining Simulation Using the NIST Pulse-Heat Kolsky Bar
Published: 1/1/2003
Authors: Eric Paul Whitenton, Michael Kennedy, Matthew A. Davies, Gerald V. Blessing, Brian S. Dutterer, Richard L. Rhorer, Howard W Yoon, Richard Joel Fields, D Basak, Timothy J Burns
Abstract: A new facility for dynamic material testing using a traditional Kolsky bar with the addition of controlled electrical-resistive pulse heating has been established at the National Institute of Standrds and Technology (NIST). Dynamic stress-strain data ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821954



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