Results 11 to 20 of about 10,346 (211)
Nature, 1931 Es wird der Meinungsaustausch zwischen Milne, Eddington und Jeans dargelegt, der am 9. Januar d. J. während der Sitzung der Royal Astronomical Society in London stattfand. Milne erklärte, daß der Hauptzweck seiner Theorie des Sterninnerns in der Befreiung der Eddingtonsehen Theorie von ad hoc-Hypothesen liege.
Russell, H. N., Atkinson, R. d'E.
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Contributions to Plasma Physics, Volume 63, Issue 5-6, June-July 2023., 2023 Abstract In three‐dimensional (3D) equilibrium, reconstruction defining parameters of an ideal magneto‐hydrodynamic equilibrium are inferred from a set of plasma diagnostic measurements. For the reconstructed parameters, various forms of uncertainty estimates exist within common 3D reconstruction frameworks.
Robert Köberl +5 more
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Beltrami fields and knotted vortex structures in incompressible fluid flows
Bulletin of the London Mathematical Society, Volume 55, Issue 3, Page 1059-1103, June 2023., 2023 Abstract This paper gives a survey on recent results about the existence of knotted vortex structures in incompressible fluids. This includes the proof of Lord Kelvin's conjecture on the existence of knotted vortex tubes in steady Euler flows and a new probabilistic approach to address Arnold's speculation that typical Beltrami fields should exhibit ...
Alberto Enciso, Daniel Peralta‐Salas
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Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023 This paper presents the study of time‐fractional nonlinear fifth‐order Korteweg–de Vries equations by utilizing an adequate novel technique, namely, the q‐homotopy analysis transform method. The fifth‐order Korteweg–de Vries equation has got its importance in the study of magneto‐sound propagation in plasma, capillary gravity water waves, and the ...
D. G. Prakasha +5 more
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Implementation and validation of guiding centre approximation into ERO2.0
Contributions to Plasma Physics, Volume 62, Issue 5-6, June‐July 2022., 2022 Abstract The Monte‐Carlo code ERO2.0 uses full orbit resolution to follow impurity particles throughout the plasma volume to determine the local erosion and deposition fluxes on the plasma‐facing components of fusion devices in magnetic confinement fusion.
Sebastian Rode +5 more
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International Journal of Energy Research, Volume 46, Issue 3, Page 2748-2770, 10 March 2022., 2022 Summary One of the most challenging objectives of the European research concerning nuclear fusion technology, promoted by the EUROfusion consortium, is to bring stellarator‐type nuclear fusion devices to maturity. To this purpose, studies on a large HELIcal‐axis advanced stellarator (HELIAS), extrapolated from Wendelstein 7‐X and based on a 5‐fold ...
Gaetano Bongiovì +3 more
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Nuclear Fusion Pattern Recognition by Ensemble Learning
Complexity, Volume 2021, Issue 1, 2021., 2021 Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus. This is usually accompanied by the release of large quantities of energy. This energy could be cheaper, cleaner, and safer than other technology currently in use.
G. Farias +6 more
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Stellar ages from stellar rotation [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractOur ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass.
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Stellar Motions and Stellar Dynamics [PDF]
Transactions of the International Astronomical Union, 1962 The texts of the twelve prepared contributions, often in abbreviated form, are given first; they are followed by a summary of the discussion on all the contributions considered together.
A. Blaauw +8 more
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Stellar Structure and the Origin of Stellar Energy* [PDF]
Nature, 1930 THE generally accepted theory of the internal conditions in stars, due to Sir A. S. Eddington, depends largely on a special solution of the fundamental equations, and according to this a definite calculable luminosity is associated with a given mass. If this were the only solution of the equations it would conflict, as I have repeatedly shown in recent
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