Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Essén, Hanno"'
Autor:
Fiolhais, Miguel C. N., Essén, Hanno
Publikováno v:
Physica C, 497, 54 (2014)
The solutions of the London equations for the magnetic field expulsion from superconductors are presented in this paper for the cylindrical symmetry. The result is analyzed in detail and represented numerically for the case of a uniform external magn
Externí odkaz:
http://arxiv.org/abs/1407.3393
Autor:
Essén, Hanno
Publikováno v:
Journal of Gravity 2014 (2014) pp. 415649--1-5
The gravitational Lagrangian based on special relativity and the assumption of a fourth rank tensor interaction, derived by Kennedy (1972), is used to check Mach's principle in a homogeneous isotropic expanding universe. The Lagrangian is found to be
Externí odkaz:
http://arxiv.org/abs/1411.5608
Autor:
Essen, Hanno, Fiolhais, Miguel C. N.
A number of facts indicating the relevance of the Darwin magnetic interaction energy in the superconducting phase are pointed out. The magnetic interaction term derived by Darwin is the same as the, so called, Breit term in relativistic quantum mecha
Externí odkaz:
http://arxiv.org/abs/1312.1607
Autor:
Levi, Giuseppe, Foschi, Evelyn, Hartman, Torbjörn, Höistad, Bo, Pettersson, Roland, Tegnér, Lars, Essén, Hanno
An experimental investigation of possible anomalous heat production in a special type of reactor tube named E-Cat HT is carried out. The reactor tube is charged with a small amount of hydrogen loaded nickel powder plus some additives. The reaction is
Externí odkaz:
http://arxiv.org/abs/1305.3913
Autor:
Fiolhais, Miguel C. N., Essén, Hanno
The most general electrodynamic equations of a perfect conducting state are obtained using a variational principle in a classical framework, following an approach by Pierre-Gilles de Gennes. London equations are derived as the time-independent case o
Externí odkaz:
http://arxiv.org/abs/1301.5675
Autor:
Essen, Hanno
Publikováno v:
Eur. J. Phys. 34 (2013) 139 - 145
It is pointed out that recent cosmological findings seem to support the view that the mass/energy distribution of the universe defines the Newtonian inertial frames as originally suggested by Mach. The background concepts of inertial frame, Newton's
Externí odkaz:
http://arxiv.org/abs/1208.3096
Autor:
Fiolhais, Miguel C. N., Essén, Hanno
Publikováno v:
2012 EPL 97 44006
The interaction between radiation and superconductors is explored in this paper. In particular, the calculation of a plane standing wave scattered by an infinite cylindrical superconductor is performed by solving the Helmholtz equation in cylindrical
Externí odkaz:
http://arxiv.org/abs/1202.4793
Autor:
Essen, Hanno, Fiolhais, Miguel C. N.
Publikováno v:
Am. J. Phys. 80 (2), 2012, pp.164-169
We review the literature on what classical physics has to say about the Meissner effect and the London equations. We first discuss the relevance of the Bohr-van Leeuwen theorem for the perfect diamagnetism of superconductors. The conclusion is that t
Externí odkaz:
http://arxiv.org/abs/1109.1968
Autor:
Essen, Hanno
Publikováno v:
EPL (Europhysics Letters) 94 (2011) 47003-p1-p5
The Bohr-van Leeuwen theorem is often summarized as saying that there is no classical magnetic susceptibility, in particular no diamagnetism. This is seriously misleading. The theorem assumes position dependent interactions but this is not required b
Externí odkaz:
http://arxiv.org/abs/1008.1182
Autor:
Nordmark, Arne B., Essen, Hanno
Publikováno v:
Eur. J. Phys. 31 (2010) 1307-1317
A particle that moves along a smooth track in a vertical plane is influenced by two forces: gravity and normal force. The force experienced by roller coaster riders is the normal force, so a natural question to ask is: what shape of the track gives a
Externí odkaz:
http://arxiv.org/abs/1007.1394