Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Amanda Koepke"'
Autor:
Martha I. Bodine, Jean-Daniel Deschênes, Isaac H. Khader, William C. Swann, Holly Leopardi, Kyle Beloy, Tobias Bothwell, Samuel M. Brewer, Sarah L. Bromley, Jwo-Sy Chen, Scott A. Diddams, Robert J. Fasano, Tara M. Fortier, Youssef S. Hassan, David B. Hume, Dhruv Kedar, Colin J. Kennedy, Amanda Koepke, David R. Leibrandt, Andrew D. Ludlow, William F. McGrew, William R. Milner, Daniele Nicolodi, Eric Oelker, Thomas E. Parker, John M. Robinson, Stefania Romish, Stefan A. Schäffer, Jeffrey A. Sherman, Lindsay Sonderhouse, Jian Yao, Jun Ye, Xiaogang Zhang, Nathan R. Newbury, Laura C. Sinclair
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033395 (2020)
We use frequency-comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5-km open-air link. Our free-space measurement is
Externí odkaz:
https://doaj.org/article/73e8b65a1e2d4fd4b5b0a1350a920fb7
NIST has developed a software package that allows users to fit test results obtained from Charpy or toughness tests as a function of test temperature, thereby obtaining so-called transition curves. Non-linear fitting is available for five regression
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::027e0a51e72061a6c519471c21aba98f
https://doi.org/10.6028/nist.tn.2158
https://doi.org/10.6028/nist.tn.2158
Publikováno v:
Journal of Research of the National Institute of Standards and Technology. 126
A generative adversarial network (GAN) is an artificial neural network with a distinctive training architecture, designed to createexamples that faithfully reproduce a target distribution. GANs have recently had particular success in applications inv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d358cb8f1fd61a31283fe30c5bc9157
https://doi.org/10.6028/jres.126.008
https://doi.org/10.6028/jres.126.008
This report is part of a multi-phase mixed methods project that is designed to provide an in-depth look at the population of National Institute of Standards and Technology (NIST) federal employees to identify factors, attitudes, and processes that mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed5a1ec9a8a625e47ba7149e32c364a8
https://doi.org/10.6028/nist.ir.8363
https://doi.org/10.6028/nist.ir.8363
Autor:
Colin Kennedy, W. F. McGrew, Stefan A. Schäffer, John Robinson, Nathan R. Newbury, Jean-Daniel Deschênes, Xiaogang Zhang, Sarah L. Bromley, Isaac H. Khader, Samuel M. Brewer, Jun Ye, Jeff Sherman, William C. Swann, Amanda Koepke, Jwo-Sy Chen, Thomas E. Parker, David R. Leibrandt, Laura C. Sinclair, R. J. Fasano, Dhruv Kedar, Eric Oelker, David Hume, Tara M. Fortier, Andrew D. Ludlow, Tobias Bothwell, Jian Yao, Stefania Romish, Kyle Beloy, Holly Leopardi, Youssef S. Hassan, William R. Milner, Scott A. Diddams, Daniele Nicolodi, Martha I. Bodine, Lindsay Sonderhouse
We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fda73d16dd5a261aa830d358bb17381
http://arxiv.org/abs/2006.01306
http://arxiv.org/abs/2006.01306
Autor:
Jacob D. Rezac, Mike Chang, Jeffrey A. Jargon, Robert T. Johnk, Irena Stange, Paul M. McKenna, Chriss Hammerschmidt, Christopher Hoyt, Paul D. Hale, Sofia Springer, Amanda Koepke, Joseph E. Diener, Rod Leonhardt, Kate A. Remley, Jeanne T. Quimby, Richard Chad Smith, Sarah Streett, Nicholas DeMinco
Channel modeling often provides a basis for the design and deployment of wireless technology. Engineers design systems to operate under certain expected channel conditions. Channel models are typically based on the statistics of a collection of many
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b7ef22d591339790345b494c0da06a1
https://doi.org/10.6028/nist.tn.2076
https://doi.org/10.6028/nist.tn.2076
Autor:
John Robinson, Tara M. Fortier, Tobias Bothwell, W. F. McGrew, Scott A. Diddams, Dhruv Kedar, Daniele Nicolodi, Youssef S. Hassan, Jian Yao, Jeff Sherman, Amanda Koepke, Thomas E. Parker, May E. Kim, Jun Ye, Andrew D. Ludlow, Eric Oelker, Jwo-Sy Chen, D. H. Hume, Martha I. Bodine, Nathan R. Newbury, R. J. Fasano, William C. Swann, Xiaogang Zhang, K. Beloy, Lindsay Sonderhouse, Isaac H. Khader, David R. Leibrandt, Holly Leopardi, William R. Milner, David J. Wineland, Laura C. Sinclair, Jean-Daniel Deschenes, Colin Kennedy, Stefan A. Schäffer, Sarah L. Bromley, Nicholas Nardelli, Samuel M. Brewer, Ethan Clements
Publikováno v:
Web of Science
We demonstrate optical frequency comparison of the 171Yb, 27Al+ and 87Sr atomic clocks with measurement uncertainties below 1 part in 1017, and discuss how phase-coherent and synchronous clock comparisons can be used to improve measurement stability.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fb5862ca0ace77d534c296a42bb90a4
https://doi.org/10.1364/cleo_si.2020.sth3g.3
https://doi.org/10.1364/cleo_si.2020.sth3g.3
Publikováno v:
2019 IEEE Asia-Pacific Microwave Conference (APMC).
We verified the performance of a correlation-based channel sounder in the 3550 MHz to 3650 MHz band with a calibrated vector network analyzer (VNA) by comparing measurements in a stable, coaxial environment at the same reference planes. The purpose o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa1714f0154147f8e4eccf197a3ce9ac
https://doi.org/10.1109/apmc46564.2019.9038390
https://doi.org/10.1109/apmc46564.2019.9038390
Publikováno v:
Metrologia. 54:S34-S62
Interlaboratory studies in measurement science, including key comparisons, and meta-analyses in several fields, including medicine, serve to intercompare measurement results obtained independently, and typically produce a consensus value for the comm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79785597b18ff7fe38d5c6ff583f3d9e
https://doi.org/10.1088/1681-7575/aa6c0e
https://doi.org/10.1088/1681-7575/aa6c0e
Publikováno v:
2019 IEEE MTT-S International Microwave Symposium (IMS).
Uncertainty analysis of microwave electronic measurements enables the quantification of device performance and aides in the development of robust technology. The Monte Carlo method is commonly used to attain accurate uncertainty analyses for complica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41225fdc957618c7a4da17364f1d775b
https://doi.org/10.1109/mwsym.2019.8701028
https://doi.org/10.1109/mwsym.2019.8701028