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NIST Authors in Bold

Displaying 101 - 125 of 319

Flux-Pinning of Bi 2 Sr 2 CaCu 2 O 8 High T c Superconducting Tapes Utilizing (Sr,Ca) 14 Cu 24 O 41 and Sr 2 CaAl 2 O 6 Defects

February 19, 2017
Author(s)
T J. Haugan, Winnie Wong-Ng, Lawrence P. Cook, L Swartzendruber, H J. Brown, D T. Shaw
… growth method in air with variable melting from 865 C to 890 C, and slow-cool recrystallization from 856 C to … 01 x 1 defects. The 03A1 2 defects increased to 1 m to 5 m size by coarsening with increasing melting temperatures … approximately equal to} 30 % and approximately equal to} 5 %, respectively, of N = 0 tapes. …

Operational Impacts of IEEE 802.1Qbv Scheduling on a Collaborative Robotic Scenario

October 17, 2022
Author(s)
Rick Candell, Karl Montgomery, Mohamed Hany, Susruth Sudhakaran, Justin Albrecht, Dave Cavalcanti
Time-sensitive networking (TSN) is an emerging topic for the advancement of wireless networking for industrial applications. TSN, as defined under the umbrella of IEEE 802.1 standards, addresses issues related to providing deterministic communications over

Detecting GNSS Spoofing using a Network of Hardware Oscillators

March 11, 2016
Author(s)
Dhananjay Anand, Tanvir M. Arafin, Gang Qu
In the face of growing concern about spoofing attacks on GNSS transmissions, we propose a scheme to cross validate GNSS based timing against intrinsic properties of local hardware oscillators. We demonstrate our approach as being able to detect certain

NIST Data Gateway

October 16, 2008
Author(s)
D M. Blakeslee, Angela Y. Lee, A J. Belsky, John E. Fuller III
… standard reference databases (26 online data systems and 48 PC products). Search results include links both to free …

Frequency ratio of Al + and Hg + single-ion optical clocks; metrology at the 17th decimal place

March 6, 2008
Author(s)
Till P. Rosenband, David Hume, P. O. Schmidt, Chin-Wen Chou, Anders Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Nathan R. Newbury, W Swann, Wayne M. Itano, David J. Wineland, James C. Bergquist
… atomic clocks with a total fractional uncertainty of 5.2 X 10 -17 . This frequency ratio is the best-known … clock frequencies Ņ Al+ /Ņ Hg+ is 1.052 871 833 148 990 48(6), where the uncertainty comprises a statistical …

A 110 GHz Comb Generator in a 250 nm InP HBT Technology

April 18, 2022
Author(s)
Jerome Cheron, Dylan Williams, Richard Chamberlin, Miguel Urteaga, Paul D. Hale, Rob Jones, Ari Feldman
… V. In the frequency domain, the comb generator provides -48.7 dBm of output power at 110 GHz when the circuit is fed …

Determination of the Scattering Lengths of 39 K from 1 u Photoassociation Lineshapes

December 1, 1999
Author(s)
Carl J. Williams, Eite Tiesinga, Paul S. Julienne, H Wang, W C. Stwalley, P L. Gould
We report threshold scattering properties for 39K(f = 1) atoms obtained from analysis of experimental photoassociation spectra of the purely long-range 39K 21 u state. The existence of hyperfine structure in the excited K 2 1 u state and a knowledge of the

A Clock Ensemble Using Only Active Hydrogen Masers

January 31, 2017
Author(s)
Thomas E. Parker, Stefania Romisch
The current real-time timescale at NIST, AT1, as well as the post-processed scale TP162, both contain hydrogen masers and commercial cesium frequency standards. The cesium standards are much nosier in the short term than the hydrogen masers and
Displaying 101 - 125 of 319
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