Results 1 to 10 of about 2,719,005 (328)

Rotation and pseudo-rotation [PDF]

General Relativity and Gravitation, 2005
Eigenvectors of stress-energy tensor (the source in Einstein's equations) form privileged bases in description of the corresponding space-times. When one or more of these vector fields are rotating (the property well determined in differential geometry),
A.P. Lightman, C.W. Misner, D. Kramer, D.M. Chitre, F. Fayos, H. Stephani, Héctor Vargas-Rodríguez, J. Horskÿ, N.V. Mitskievich, N.V. Mitskievich, N.V. Mitskievich, Nikolai V. Mitskievich   +11 more
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The Dorr Type and Cortical Thickness Index of the Proximal Femur for Predicting Peri-Operative Complications during Hemiarthroplasty

Journal of Orthopaedic Surgery, 2014
Purpose. To assess the Dorr proximal femoral types and the cortical thickness index for predicting peri-operative complications during hemiarthroplasty. Methods.
William Nash, Andrew Harris
doaj   +1 more source

The rotation curves shapes of late-type dwarf galaxies [PDF]

, 2008
We present rotation curves derived for a sample of 62 late-type dwarf galaxies that have been observed as part of the Westerbork HI Survey of Spiral and Irregular Galaxies (WHISP) project.
Begeman, Begum, Blais-Ouellette, Bosma, Bosma, Bottema, Broeils, Bullock, Casertano, Catinella, Corradi, Côté, de Blok, de Blok, de Blok, de Blok, Ford, García-Ruiz, Garrido, Hunter, J. M. van der Hulst, Kent, Kent, Kregel, Kuzio de Naray, Marchesini, McGaugh, Navarro, Navarro, Noordermeer, Persic, Persic, Power, Puche, R. A. Swaters, R. Sancisi, Rhee, Rubin, Sancisi, Sicotte, Sicotte, Simon, Spekkens, Spekkens, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, Swaters, T. S. van Albada, Tully, van den Bosch, van den Bosch, Verheijen   +55 more
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Enhanced Vertical Inhomogeneity in Turbulent Rotating Convection [PDF]

, 2008
In this Letter we report experimental evidence that rotation enhances vertical inhomogeneity in turbulent convection, in spite of the increased columnar flow ordering under rotation.
Clercx, H.J.H., Geurts, B.J., Kunnen, R.P.J.   +2 more
core   +4 more sources

Numerical Investigation of the Flow around a Feather Shuttlecock with Rotation

Proceedings, 2020
This paper presents the first scale resolving computational fluid dynamic (CFD) investigation of a geometrically realistic feather shuttlecock with rotation at a high Reynolds number.
John Hart, Jonathan Potts
doaj   +1 more source

Controlled Brewster Effect in the Scattering of Electromagnetic Waves on Pseudo-Rotating Lattices of Dielectric Resonators

Vìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2023
Various conditions for the occurrence of anomalous scattering, in which most of the power is emitted by the lattice only in the direction of propagation of the incident wave, are analyzed.
O. O. Trubin
doaj   +1 more source

Health Monitoring on the Spacecraft Bearings in High-Speed Rotating Systems by Using the Clustering Fusion of Normal Acoustic Parameters

Applied Sciences, 2019
The rolling bearings in moment wheel assemblies (MWAs) or control moment gyros (CMGs) are not only the core components in spacecrafts but also prone to failure.
Dengyun Wu, Hong Wang, Hongxing Liu, Tian He, Tao Xie   +4 more
doaj   +1 more source

Mechanical Faraday effect for orbital angular momentum-carrying beams [PDF]

, 2014
When linearly polarised light is transmitted through a spinning window, the plane of polarisation is rotated. This rotation arises through a phase change that is applied to the circularly polarised states corresponding to the spin angular momentum (SAM).
Aleksandrov, Allen, Allen, Bigelow, Bigelow, Boyd, Courtial, Dawber, Emma Wisniewski-Barker, Faraday, Franke-Arnold, Franke-Arnold, Graham M. Gibson, Götte, Jones, Jones, Kozlov, Leach, Miles J. Padgett, Nienhuis, Padgett, Padgett, Player, Robert W. Boyd, Sonja Franke-Arnold, Wisniewski-Barker, Wisniewski-Barker, Yao   +27 more
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A Fault Diagnosis Method for Satellite Flywheel Bearings Based on 3D Correlation Dimension Clustering Technology

IEEE Access, 2018
Flywheel bearing is a key mechanical part of a satellite. Its health plays an important role in the fatigue life of the satellite. However, it is rather difficult to diagnose the health state of the bearings due to the complex satellite system.
Changrui Chen, Tian He, Dengyun Wu, Qiang Pan, Hong Wang, Xiaofeng Liu   +5 more
doaj   +1 more source

Instabilities of Shercliffe and Stewartson layers in spherical Couette flow [PDF]

, 2008
We explore numerically the flow induced in a spherical shell by differentially rotating the inner and outer spheres. The fluid is also taken to be electrically conducting (in the low magnetic Reynolds number limit), and a magnetic field is imposed ...
Hollerbach, R., Wei, X.
core   +1 more source