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Optical clock frequency ratios with uncertainty ? 3.2 * 10^-18

January 6, 2026

Author(s)

Alexander Aeppli, Willa Arthur-Dworschack, Kyle Beloy, Caitlin Berry, Tobias Bothwell, Angela Folz, Tara Fortier, Tanner Grogan, Youssef Hassan, Zoey Zimeng Hu, David Hume, Benjamin Hunt, Kyungtae Kim, Amanda Koepke, Dahyeon Lee, David Ray Leibrandt, Ben Lewis, Andrew Ludlow, Mason Marshall, Nicholas Nardelli, Harikesh Ranganath, Daniel Rodriguez Castillo, Jeffrey Sherman, Jacob Siegel, Suzanne Thornton, William Warfield, Jun Ye

… 87Sr ratios at 1 × 10−16 and the Al+/Yb ratio at 1.5 × 10−17 in fractional units compared to our previous measurement …

Detecting Firefighter's Tenability Utilizing Machine Learning

August 30, 2024

Author(s)

Qi Tong, Hongqiang FANG, Eugene Yujun Fu, Wai Cheong Tam, Thomas Gernay

… testing of a machine learning model with a ratio of 69:14:17. The machine learning model is fine-tuned, and results …

Dynamic acoustic optimization of pulse tube refrigerators for rapid cooldown

April 23, 2024

Author(s)

Ryan Snodgrass, Vincent Kotsubo, Scott Backhaus, Joel Ullom

Pulse tube refrigerators are a critical enabling technology for many disciplines that require low temperatures. These refrigerators dominate the total power consumption of most modern cryostats, including those that reach millikelvin temperatures using

Liquid-Phase Speed of Sound and Vapor-Phase Density of Difluoromethane

September 23, 2022

Author(s)

Aaron Rowane, Elizabeth Rasmussen, Mark O. McLinden

… (k = 2) in the speed of sound ranged from 0.035 to 0.17%. One hundred and thirty-eight vaporphase density …

Curated variation benchmarks for challenging medically relevant autosomal genes

February 7, 2022

Author(s)

Justin Wagner, Nathanael David Olson, Lindsay Harris, Jennifer McDaniel, Fritz Sedlazeck, Chen-Shan Chin, Justin Zook

… whole-genome assembly. This curated benchmark reports over 17,000 single-nucleotide variations, 3,600 insertions and …

Magnetic structure of magnetoelectric multiferroic HoFeWO6

February 1, 2022

Author(s)

C. Dhital, Rebecca Dally, D. Pham, T. Keen, Qiang Zhang, P. Siwakoti, R. Nepal, R. Jin, R. Rai

… of W6+ and Fe3+. An antiferromagnetic transition at TN = 17 K is accompanied by a significant change in magnetic … from the neutron diffraction measurements. Below T ≈ 4 K, the Ho spins order independently and pull the Fe spins …

Arrhenius-like Temperature Dependence of the Segmental Relaxation below T g

October 12, 2021

Author(s)

P A. O'Connell, G B. McKenna

… were aged into equilibrium at temperatures up to 17 EC below the conventionally measured glass transition …

The Microwave Spectrum and Ground State Structure of H 2 O-HI

October 12, 2021

Author(s)

A McIntosh, T Walther, R R. Lucchese, J W. Bevan, R D. Suenram, A C. Legon

… MHz, χ aa = -1479.399(20) MHz,(χ bb- χ cc ) = -17.37(2) MHz. Evidence will be presented for a complex that … ground state planar geometry with an R(O-I) distance=3.745(4) Angstrom}, assuming no change in the geometry of the … zero-point oscillation angle θ av = cos -1 ( 1/2 ) = 20.89(4) . The value of k α = 6.64(2) N m -1 evaluated from the …

Femtosecond Time Synchronization of Optical Clocks Off a Flying Quadcopter

April 18, 2019

Author(s)

Hugo Bergeron, Laura C. Sinclair, William C. Swann, Isaac H. Khader, Kevin C. Cossel, Michael A. Cermak, Jean-Daniel Deschenes, Nathan R. Newbury

Optical clock networks promise advances in global navigation, time distribution, coherent sensing, relativity experiments, dark matter searches and other areas1-12. Such networks will need to compare and synchronize clocks over free-space optical links

Normal-phase liquid chromatography retention behavior of polycyclic aromatic sulfur heterocycles (PASHs) and alkyl-substituted PASH isomers on an aminopropyl stationary phase

December 14, 2017

Author(s)

Walter Wilson, Hugh Hayes, Lane Sander, Andres Campiglia, Stephen Wise

… Da cata-PASHs. Correlation coefficients ranged from r = -0.17 (MM 234 Da) to r = -0.65 (MM 334 Da), which were …

Baseline assessment of 25-hydroxyvitamin D reference material and proficiency testing/external quality assurance material commutability - a vitamin D standardization program study

August 10, 2017

Author(s)

Karen W. Phinney, Christopher T. Sempos, Hubert W. Vesper, Julianne C. Botelho, M Dasti, Yasamin Rahmani, Susan Tai, Johanna Camara, Stephen A. Wise, Gary L. Myers, Ramon Durazo-Arvizu, Lu Tian, John H. Eckfeldt, Andrew N. Hoofnagle, W. Greg Miller, Lorin M. Bachmann, Ian S. Young, J Pettit, G. Caldwell, A Liu, S P. Brooks, K. Sarafin, M. Thamm, C. Scheidt-Nave, G. B. Mensink, M. Busch, M. Rabenberg, Kevin Cashman, Mairead Kiely, Albert Flynn, Kirsten D. Dowling, B. Quinn, K OH, S. W. Lee, C. L. Jung, L. Cox, G. Goldberg, K. Guberg, S. Meadows, A. Prentice, G. Swan, Alison Tedstone, Schleicher Rosemary, Christine M. Pfeiffer, Graham D. Carter, Julia Jones, P. Brannon, R. M. Lucas, Neil C. Binkley, P. M. Crump, Donald Wiebe, Glenville Jones, J. M. Betz, C. D. Faigen, Joyce Merkel, Elizabeth A. Yetley, Paul M. Coates

… status. A set of 50 single donor serum samples as well as 17 reference and proficiency testing/external quality …

Revisiting Shape Selectivity in Liquid Chromatography for Polycyclic Aromatic Hydrocarbons (PAHs) - Six-Ring and Seven-Ring Cata-condensed PAH Isomers of Molecular Mass 328 Da and 378 Da

June 28, 2017

Author(s)

Jorge O. Ona Ruales, Lane C. Sander, Walter Brent Wilson, Stephen Wise

… mass 228 Da), 11 five-ring isomers (molecular mass 278), 17 six-ring isomers (molecular mass 328 Da), and 20 …

Fire Endurance Testing of Floor Systems Effects of Scale and Restraint

February 19, 2017

Author(s)

John L. Gross

… tests, 35 ft (10.7 m) span, and one half-scale test, 17 ft (5.2 m) span, were conducted. Two tests were conducted …

Ultra-stable optical clock with two cold-atom ensembles

January 1, 2017

Author(s)

Marco Schioppo, Roger Brown, Will McGrew, Nathan M. Hinkley, Robert J. Fasano, Kyle Beloy, Gianmaria Milani, Daniele Nicolodi, Jeffrey Sherman, Nate B. Phillips, Christopher W. Oates, Andrew Ludlow

… an unprecedented fractional frequency instability of 6x10^-17}/sqrt(tau) for an averaging time tau in seconds. We also …

Development of NIST Standard Reference Material(R) 2373: Genomic DNA Standards for HER2 Measurements

March 9, 2016

Author(s)

Hua-Jun He, Jamie L. Almeida, Steven Lund, Carolyn R. Steffen, Steven J. Choquette, Kenneth D. Cole

… certified HER2 amplification ratios that range from 1.3 to 17.7. The stability and homogeneity of the reference …

Laser frequency stabilization based on steady-state spectral-hole burning in Eu3+:Y2SiO5

June 23, 2015

Author(s)

Shon M. Cook, Till P. Rosenband, David R. Leibrandt

… stability of 1x10 -15 tau -1/2 that averages to 8.5 (+4.8 -1.8) x 10 -17 at tau = 73 s. Residual amplitude modulation is reduced by …

Long-Term Stability and Temporal Trends of Organic Contaminants in four Collections of Mussel Tissue Frozen Standard Reference Materials

February 25, 2015

Author(s)

Michele M. Schantz, Rebecca S. Pugh, Stacy S. Schuur, Stephen A. Wise

… a temporal trend study for these contaminants over a 17 year period (1987 to 2004). …

The Second National Ballistics Imaging Comparison (NBIC-2)

January 5, 2015

Author(s)

Theodore V. Vorburger, James H. Yen, Jun-Feng Song, Robert M. Thompson, Thomas Brian Renegar, Xiaoyu Alan Zheng, D Ott, Martin G. Ols

… 14 experts from 11 U.S. crime laboratories each performed 17 image acquisitions and correlations of the SRM cartridge …

(NISTIR 7952) Toward a Shared Approach for Ensuring Patient Safety with Enhanced Workflow Design for Electronic Health Records -- Summary of the Workshop

August 7, 2013

Author(s)

Svetlana Z. Lowry, Mala Ramaiah, Ant Ozok, Ayse P. Gurses, Michael C. Gibbons, David Brick, Emily S. Patterson, Debora Simmons

… to representatives from the host organizations, there were 17 representatives from EHR developers, three clinical …

High-resolution infrared and electron-diffraction studies of trimethylenecyclopropane ([3]-radialene)

May 16, 2013

Author(s)

Corey Wright, Joshua Holmes, Joseph W. Nibler, Kenneth Hedberg, James D. White, Lise Hedberg, Alfons Weber, Thomas A. Blake

… data to obtain the rz bond lengths (in Å): C-H = 1.072 (17), C-C = 1.437 (4), and C=C = 1.330 (4). The analysis does not lead to an accurate value of the …

Electron Dynamics of Crystalline 4-He at High Pressures

October 29, 2010

Author(s)

Eric L. Shirley, H. K. Mao, Yang Ding, Peter Eng, Yong Q. Cai, Paul Chow, Yuming Xiao, Jinfu Shu, Russell J. Hemley, Chichang Kao, Wendy L. Mao

… 4He in a high-pressure diamond-anvil cell. At 13.4 GPa, we observed the full electron excitation spectrum, … over two Brillouin zones. Measurements at 11.9 GPa to 17 GPa show a strong linear dependence of the Gamma-point … Electron Dynamics of Crystalline 4-He at High Pressures …

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 29Si, 33S, and 36Cl have been measured with a relative uncertainty 0.65 x 10 -6 using a flat-crystal spectrometer. The unique features of these measurements are 1) nearly perfect crystals whose lattice spacing is known in meters, 2

Multi-level effects in the Rabi oscillations of a Josephson phase qubit

September 15, 2008

Author(s)

S. K. Dutta, H. Paik, T. A. Palomaki, J. R. Anderson, A. J. Dragt, C. J. Lobb, F. C. Wellstood, Frederick Strauch, Kaushik Mitra, Eite Tiesinga

… Good agreement is found for a relaxation time T1 = 17 ns and pure dephasing time Tphi = 16 ns, allowing us to …

Randomized Benchmarking of Quantum Gates

January 1, 2007

Author(s)

Emanuel Knill, D. Leibfried, R. Reichle, J. Britton, R. B. Blakestad, J. D. Jost, C. Langer, R Ozeri, Signe Seidelin, David J. Wineland

… error probability per randomized pi/2 pulse of 0.00482(17). We expect this error probability to be readily …

Interfaces For Personal Identity Verification, 2006 Edition

March 15, 2006

Author(s)

James F. Dray Jr., Scott Guthery, Teresa T. Schwarzhoff

[Superseded by SP 800-73-2 (September 2008): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901358] This document specifies the PIV data model, Application Programming Interface (API), and card interface requirements necessary to comply with

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