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Displaying 1 - 25 of 383

Precision Measurement of the 29 Si, 33 S, and 36 Cl Binding Energies

October 16, 2008
Author(s)
Maynard S. Dewey, Ernest G. Kessler Jr., R Deslattes, H G. Borner, M Jentschel, C Doll, P Mutti
… The binding energies of 29 Si, 33 S, and 36 Cl have been measured with a relative … that is significantly less (factors of 7, 67, and 16 for 29 Si, 33 S, and ^u36&Cl respectively) than the uncertainty … Precision Measurement of the 29 Si, 33 S, and 36 Cl Binding Energies …

Solid-State 29 Si NMR and Neutron-Diffraction Studies of Sr 0.07 K 0.3 SiO 2.85 Oxide Ion Conductors

July 7, 2014
Author(s)
Jungu Xu, Xiaoming Wang, Hui Fu, Craig Brown, Xiping Jing, Fuhui Liao, Fengqi Lu, Xiaohui Li, Xiaojun Kuang, Mingmei Wu
… oxide fuel cells, were characterized using solid-state 29 Si nuclear magnetic resonance (NMR)spectroscopy, neutron … Si 3 O 9 tetrahedral rings derived from the NPD study, the 29 Si NMR data provide new insight into the local defect … SiO 3-05.x . The Q 1 -linked tetrahedral Si signal in the 29 Si NMR data suggest that the Si 3 O 9 tetrahedral rings in …

29Si NMR and SAXS investigation of the hybrid organic-inorganic glasses obtained by consolidation of the melting gels

March 15, 2017
Author(s)
Andrei Jitianu, Sylvian Cadars, Fan Zhang, Gabriela Rodriguez, Quentin Picard, Mario Aparicio, Jadra Mosa, Lisa C. Klein
This study is focused on structural characterization of hybrid glasses obtained by consolidation of melting gels. The melting gels were prepared in molar ratios of methyltriethoxysilane (MTES) and dimethyldiethoxysilane (DMDES) of 75%MTES-25%DMDES and 65

CALIBRATION OF SPECTRORADIOMETERS USING TUNABLE LASERS

April 22, 2021
Author(s)
Yuqin Zong, Ping-Shine Shaw, Joseph Rice, C Cameron Miller
To shorten the long calibration chain when using the conventional source-based approach and therefore to reduce spectroradiometer's calibration uncertainty, we developed a detector-based approach to calibrate spectroradiometers directly against a transfer

STANDARD LEDS WITH SUPERIOR LONG-TERM STABILITY

April 22, 2021
Author(s)
Yuqin Zong, Weiqiang Zhao, C Cameron Miller
A large-chip standard LED with superior long-term stability have been developed at NIST. The standard LED uses a large, specialty die rated for 50 W but is operated under 3 W to eliminate aging effect. The standard LED was seasoned for one year and

INNOVATIVE APPROACH TO COMBAT HEALTHCARE-ASSOCIATED INFECTIONS USING STANDARDS DEVELOPED THROUGH INDUSTRY AND U.S. FEDERAL COLLABORATION

June 14, 2019
Author(s)
Carl C. Miller, Thomas C. Larason, Dianne L. Poster, Yaw S. Obeng, Mike Postek, Richard Martinello
Nationwide, healthcare-associated infections (HAIs) infect one in every 25 hospital patients, account for more than 99,000 deaths and increase medical costs by more than $35 billion, each year. Ultraviolet-C (UV-C) antimicrobial devices are shown to reduce

DEVELOPMENT OF A MINIATURE, MULTICHANNEL, EXTENDED-RANGE FABRY-PEROT FIBER-OPTIC LASER INTERFEROMETER SYSTEM FOR LOW FREQUENCY SI-TRACEABLE DISPLACEMENT MEASUREMENT

October 12, 2014
Author(s)
Bartosz K. Nowakowski, Douglas T. Smith, Stuart T. Smith
Laser interferometry has become a staple of SI-traceable displacement measurement techniques. With decreasing cost per channel, miniaturization, and a multitude of commercially available off-the-shelf systems, these systems create ever more attractive

Calculating Voxel-Polyhedron Intersections for Meshing Images

October 9, 2021
Author(s)
Stephen A. Langer, Andrew Reid
Finite element meshes constructed from 3D images are useful in materials science and medical applications when it is necessary to model the actual geometry of a sample, rather than an idealized approximation of it. Constructing the mesh involves computing

Extracting Mathematical Concepts from Text

October 12, 2022
Author(s)
Jacob Collard, Valeria de Paiva, Brendan Fong, Eswaran Subrahmanian
We investigate some different systems for extracting mathematical entities from texts in the mathematical field of category theory, as a first step for constructing a mathematical knowledge graph. We consider four different term extractors and compare

NIST Micronutrients Measurement Quality Assurance Program Summer 2008 Comparability Studies: Results for Round Robin LXIV Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 29 Ascorbic Acid in Human Serum

August 5, 2013
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
… Vitamins and Carotenoids in Human Serum and 2) Round Robin 29 Total Ascorbic Acid in Human Serum. The materials for both … Vitamins and Carotenoids in Human Serum and Round Robin 29 Ascorbic Acid in Human Serum …

Standard Reference Material 1751 - A Gallium Melting-Point Standard

August 1, 2004
Author(s)
Gregory F. Strouse
… The melting point of gallium %2829%2E7646%B0C%29 is a defining thermometric fixed point of the International Temperature Scale of 1990 %28ITS%2D90%29%2E Realization of this melting point is performed using a … high%2Dpurity %28mass fraction %B3 99%2E99999%25pure%29 gallium%2E A 30kg single lot of gallium %28mass fraction …

Effect of Ag on the Primary Phase Field of High T c (Bi,Pb)-2223 Superconductor

February 1, 2000
Author(s)
Winnie K. Wong-Ng, Lawrence P. Cook, W Greenwood, Anthony J. Kearsley
… in the presence of Ag have been determined under 7.5 volume % O 2 (92.5 % Ar). A total of 29 six-phase volumes that include the (Bi, Pb)-2223 and Ag … of Ag. The range of initial melt compositions of the 29 volumes expressed in mole fraction % covers BiO 1.5 from …
Displaying 1 - 25 of 383
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