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NIST Kibble-4 balance flexures
No full textThese 2-degree-of-freedom flexures were part of the NIST-4 Kibble Balance. These flexures were at the connection joints of the hanging assemblies of the instrument and were critical for the precision alignment of the measurement coil to the magnetic field. \n\n The NIST-4 Kibble balance, which began full operation in 2015, measured the Planck's constant to within 13 parts per billion in 2017, which was accurate enough to assist with the 2019 redefinition of the kilogram.[H] 2.54 cm __[W] 2.54 cm __[D] 2.54 cm _
Jeffrey Horlick
No full textJEFFREY HORLICK
NBS/NIST: 1967-2006
INDUCTED: 2014
B: 1945, New York, New York
EDUCATION:
University of Maryland, BS (Physics), 1967
University of Manchester, England, Graduate studies (Microwave Spectroscopy), 1967-1968
CITATION:
For leadership and contributions in laboratory accreditation, standards, and conformity assessment that significantly enhanced the safety and health of consumers and first responders, U.S. homeland security, and product quality.
POSITIONS HELD AT NBS/NIST:
Physicist, Metallurgy Division, Institute for Materials Research (IMR), 1967-1968
Physicist, Product Evaluation Technology Division, IMR, 1969-1972
Physicist, Paper Section, NBS Collaborative Reference Programs, Polymers Division, IMR, 1972-1978
Physicist, National Voluntary Laboratory Accreditation Program (NVLAP), 1977-2006
NIST Guest Researcher, Standards Coordination Office, 2006-present
HONORS:
NIST Bronze Medal (2002); U.S. Department of Commerce Silver Medal (2003)
Fellow, Washington Academy of Sciences Senior
Member, Institute of Electrical and Electronics Engineers Senior
Member, American Society for Quality
MEMBERSHIPS:
Washington Academy of Sciences
Institute of Electrical and Electronics Engineers IEEE Electromagnetic Compatibility Society
American Society for Quality
Sigma Xi
PUBLICATIONS:
More than 25 publications including:
Gladhill, R.J., Horlick, J., and Eisenhower, E., The National Personal Radiation Dosimetry Accreditation Program, NBSIR 86-3350 (1986)
Horlick, J., “Interlaboratory and Intralaboratory Proficiency Testing,” Accreditation Practices for Inspections, Tests, and Laboratories, ASTM STP 1057, pp 85-94 (1989)
Carnahan, L., Carver, G., Gray, M., Hogan, M., Hopp, T., Horlick, J., Lyon, G., and Messina, E., Metrology for Information Technology (IT), NISTIR 6025 (1997)
Faison, C.D., Horlick, J., Merkel, W.R., and White, V.R., Editors, NVLAP Procedures and General Requirements, NIST Handbook 150 (2006)
Horlick, J. and Knab, L., “Thermal Conductivity Proficiency Testing Results – Nineteen NVLAP Proficiency Testing Rounds from 1986 Through 2004,” Thermal Conductivity 30 - Proceedings of the Thirtieth International Thermal Conductivity Conference and Proceedings of the Eighteenth International Thermal Expansion Symposium, pp 651-659 (2009)
Horlick, J. and 13 other joint-authors, Public Safety Bomb Suit Certification Program Requirements, National Institute of Justice (2012
Gabrielle G. Long
No full textGABRIELLE G. LONG
NBS/NIST: 1965-1967 & 1980-2003
INDUCTED: 2014
B: 1942, New Brunswick, New Jersey
EDUCATION:
Barnard College, New York, NY, AB (Physics), 1964
Polytechnic Institute of Brooklyn, New York, NY, MS (Physics), 1970
Polytechnic Institute of Brooklyn, New York, NY, PhD (Physics), 1972
CITATION:
For outstanding research and group leadership that made NIST an international leader in the measurement of materials microstructure using synchrotron X-rays and neutrons.
POSITIONS HELD AT NBS/NIST:
Physicist, Polymers Division, Institute for Materials Research 1965-1967
Physicist, Ceramics Division, Materials Science and Engineering Laboratory (MSEL), 1980-1991
Group Leader, Microstructural Characterization Group, Ceramics Division, MSEL, 1991-2001
Chief (Acting), Ceramics Division, MSEL, 2002
Emeritus Scientist, Ceramics Division, Material Measurement Laboratory, 2003-present
HONORS:
NIST Bronze Medal (1998)
Fellow, American Physical Society (1992)
Maria Goeppert-Mayer Distinguished Scholar, Argonne National Laboratory (2001)
Fellow, American Association for the Advancement of Science (2005)
MEMBERSHIPS:
Editorial Board, Materials Research Society (MRS) Bulletin (1997-2007)
Basic Energy Sciences Advisory Committee (BESAC) U. S. Department of Energy (2001-2007)
Scientific Council, DESY, Hamburg, Germany (2006-2010)
LANSCE Advisory Board, Los Alamos National Laboratory (2007-2012)
Scientific Advisory Board, Max Planck Institute for Metals Research, Stuttgart, Germany (2008-2013)
Panel on Public Affairs (PoPA) American Physical Society (2010-2012)
PUBLICATIONS:
More than 150 publications including:
Luecke, W.E., Wiederhorn, S.M., Hockey, B.J., Krause Jr., R.F., and Long, G.G., “Cavitation Contributes Substantially to Tensile Creep in Silicon Nitride,” J. Am. Ceram. Soc. 78, 2085-2096 (1995)
Ilavsky, J., Allen, A.J., Long, G.G., Krueger, S., Berndt, C.C., and Herman, H., “Influence of Spray Angle on the Pore and Crack Microstructure of Plasma-sprayed Deposits,” J. Am. Ceram. Soc. 80, 733-742 (1997)
Levine, L.E., Long, G.G., Ilavsky, J., Gerhardt, R.A., Ou, R., Parker, C.A., “Self-assembly of Carbon Black into Nanowires that Form a Conductive Three Dimensional Micronetwork,” Appl. Phys. Lett., 30 (2007)
Zhang, F., Long, G.G., Jemian, P.R., Ilavsky, J., Milam, V.T., Lewis, J.A., “Quantitative Measurement of Nanoparticle Halo Formation Around Colloidal Microspheres in Binary Mixtures,” Langmuir 24, 6504-6508 (2008)
Xie, R., Long, G.G., Weigand, S.J., Moss, S.C., Carvalho, T., Roorda, S., Hejna, M., Torquato, S., Steinhardt, P.J., “Hyperuniformity in Amorphous Silicon Based on the Measurement of the Infinite-wavelength Limit of the Structure Factor,” Proc. Nat’l Acad. Sci. 110, 13250-13254 (2013)
Long, G.G., Chapman, K.W., Chupas, P.J., Bendersky, L.A., Levine, L.E., Mompiou, F., Stalick, J.K., Cahn, J.W., “Highly Ordered Noncrystalline Metallic Phase,” Phys. Rev. Lett. 111, 015502 (2013
Mechanical Properties of Austenitic Stainless Steel Made by Additive Manufacturing
No full textUsing uniaxial tensile and hardness testing, we evaluated the variability and anisotropy of the mechanical properties of an austenitic stainless steel, UNS S17400, manufactured by an additive process, selective laser melting. Like wrought materials, the mechanical properties depend on the orientation introduced by the processing. The recommended stress-relief heat treatment increases the tensile strength, reduces the yield strength, and decreases the extent of the discontinuous yielding. The mechanical properties, assessed by hardness, are very uniform across the build plate, but the stress-relief heat treatment introduced a small non-uniformity that had no correlation to position on the build plate. Analysis of the mechanical property behavior resulted in four conclusions. (1) The within-build and build-to-build tensile properties of the UNS S17400 stainless steel are less repeatable than mature engineering structural alloys, but similar to other structural alloys made by additive manufacturing. (2) The anisotropy of the mechanical properties of the UNS S17400 material of this study is larger than that of mature structural alloys, but is similar to other structural alloys made by additive manufacturing. (3) The tensile mechanical properties of the UNS S17400 material fabricated by selective laser melting are very different from those of wrought, heat-treated 17-4PH stainless steel. (4) The large discontinuous yielding strain in all tests resulted from the formation and propagation of L�ders bands
A Low-Cost Time Transfer Receiver for Contributions to Coordinated Universal Time
No full textThis paper describes a low-cost time transfer receiver that allows timing laboratories, including national metrology institutes and other designated institutions, to contribute data to the computation of Coordinated Universal Time (UTC). The time transfer receiver compares a laboratory's local realization of UTC, to signals broadcast by Global Positioning System (GPS) satellites. It stores the measurement results in a format compatible with international standards, and sends data via the Internet to the Bureau International des Poids et Mesures (BIPM) for inclusion in the UTC computation. In addition to being inexpensive, the receiver was designed to be easy to use, allowing recently established timing laboratories to begin contributing to UTC with a minimal investment in training
Oral history interview of Jon Hougen, Tuesday, February 11, 2014 / [persons present]: Jon Hougen, David Lide, Bill Gadzuk, Frank Lovas, Bill Kirchhoff.
No full textOral history interview of Dr. Jon Hougen conducted on Tuesday, February 11, 2012 at the National Institute of Standards and Technology in Gaithersburg, Maryland. Dr. Hougen, a high resolution gas phase theoretical molecular spectroscopist, discusses his career at NBS/NIST from 1967 until his retirement in 2001
(Audio) Oral history interview of Mat (Matthew) Heyman, November 19, 2014/ with David Lide, Bill Gadzuk, Jack Rush, Janet Miller, Michael Baum, Kristen Frederick-Frost, Dick Wright
No full textMat Heyman summarizes his 30-year career managing media, public affairs, and agency management matters at NBS/NIST from 1978 until his retirement in 2008. He headed up NBS Public and Business Affairs from October 1990 until July 2004 when he became Chief of Staff and served in that position until his retirement in 2008
(Transcript) Oral history interview of Mat (Matthew) Heyman, November 19, 2014/ with David Lide, Bill Gadzuk, Jack Rush, Janet Miller, Michael Baum, Kristen Frederick-Frost, Dick Wright
No full textMat Heyman summarizes his 30-year career in media related matters at NBS/NIST from 1978 until his retirement in 2008. He headed up NBS Public and Business Affairs from October 1990 until July 2004 when he became Chief of Staff and served in that position until his retirement in 2008
Sensitivity Analysis of Fatigue Crack Growth Model for API Steels in Gaseous Hydrogen
No full textA model to predict fatigue crack growth of API pipeline steels in high pressure gaseous hydrogen has been developed and is presented elsewhere. The model currently has several parameters that must be calibrated for each pipeline steel of interest. This work provides a sensitivity analysis of the model parameters in order to provide (a) insight to the underlying mathematical and mechanistic aspects of the model, and (b) guidance for model calibration of other API steels
New National Air-Kerma Standard for Low-Energy Electronic Brachytherapy Sources
No full textThe new primary standard for low-energy electronic brachytherapy sources for the United States is described. These miniature x-ray tubes are inserted in catheters for interstitial radiation therapy and operate at tube potentials of up to about 50 kV. The standard is based on the realization of the air kerma produced by the x-ray beam at a reference distance in air of 50 cm