Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Chao, Leon"'
Autor:
Schlamminger, Stephan, Keck, Lorenz, Seifert, Frank, Chao, Leon S., Haddad, Darine, Li, Shisong
Analytically the forces and torques on a coil in a field of magnetic flux density can be calculated one of two ways. The line integral can be conducted along the coil's wire, summing up the differential force contribution. For each differential line
Externí odkaz:
http://arxiv.org/abs/2208.12249
The torsion pendulum at the heart of the apparatus to measure the gravitational constant, $G$ at the Bureau International des Poids et Mesures (BIPM) is used to measure the gravitational torque between source and test-mass assemblies with two methods
Externí odkaz:
http://arxiv.org/abs/2206.04173
Autor:
Li, Shisong, Schlamminger, Stephan, Marangoni, Rafael, Wang, Qing, Haddad, Darine, Seifert, Frank, Chao, Leon, Newell, David, Zhao, Wei
Employing very simple electro-mechanical principles known from classical physics, the Kibble balance establishes a very precise and absolute link between quantum electrical standards and macroscopic mass or force measurements. The success of the Kibb
Externí odkaz:
http://arxiv.org/abs/2101.02078
Autor:
Marangoni, Rafael R., Haddad, Darine, Seifert, Frank, Chao, Leon S., Newell, David B., Schlamminger, Stephan
The design of the permanent magnet system for the new Quantum Electro-Mechanical Metrology Suite (QEMMS) is described. The QEMMS, developed at the National Institute of Standards and Technology (NIST), consists of a Kibble balance, a programmable Jos
Externí odkaz:
http://arxiv.org/abs/1912.04840
A tabletop-sized Kibble balance (KIBB-g1) designed to directly realize mass at the gram-level range with uncertainties on the order of parts in 10$^6$ has been developed at the National Institute of Standards and Technology (NIST). The masses of a no
Externí odkaz:
http://arxiv.org/abs/1910.09218
Autor:
Seifert, Frank, Panna, Alireza, Li, Shisong, Han, Bing, Chao, Leon, Cao, Austin, Haddad, Darine, Choi, Heeju, Haley, Lori, Schlamminger, Stephan
Publikováno v:
Seifert, F.; Panna, A.; Shisong Li; Bing Han; Chao, L.; Cao, A.; Haddad, D.; Heeju Choi; Haley, L.; Schlamminger, S., Instrumentation and Measurement, IEEE Transactions on , vol.63, no.12, pp.3027,3038, Dec. 2014
The magnet system is one of the key elements of a watt balance. For the new watt balance currently under construction at the National Institute of Standards and Technology, a permanent magnet system was chosen. We describe the detailed construction o
Externí odkaz:
http://arxiv.org/abs/1405.1450
Autor:
Schlamminger, Stephan, Haddad, Darine, Seifert, Frank, Chao, Leon S, Newell, David B, Liu, Ruimin, Steiner, Richard L, Pratt, Jon R
Publikováno v:
Metrologia 51, S15 (2014)
For the past two years, measurements have been performed with a watt balance at the National Institute of Standards and Technology (NIST) to determine the Planck constant. A detailed analysis of these measurements and their uncertainties has led to t
Externí odkaz:
http://arxiv.org/abs/1401.8160
Akademický článek
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Publikováno v:
Am J Phys
The dynamics of a swinging payload suspended from a stationary crane, an unwanted phenomenon on a construction site, can be described as a simple pendulum. However, an experienced crane operator can deliver a swinging payload and have it stop dead on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca77fc7f5186460f3a9270b6724ba831
https://doi.org/10.1119/10.0006965
https://doi.org/10.1119/10.0006965
Akademický článek
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