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pro vyhledávání: '"Johnson, Robert W"'
Autor:
Johnson, Robert W.
Heisenberg groups over algebras with central involution and their automorphism groups are constructed. The complex quaternion group algebra over a prime field is used as an example. Its subspaces provide finite models for each of the real and complex
Externí odkaz:
http://arxiv.org/abs/1508.04381
Autor:
Johnson, Robert W.
The algorithm AMGKQ for adaptive multivariate Gauss-Kronrod quadrature over hyper-rectangular regions of arbitrary dimensionality is proposed and implemented in Octave/MATLAB. It can approximate numerically any number of integrals over a common domai
Externí odkaz:
http://arxiv.org/abs/1410.1064
Autor:
Johnson, Robert W.
The Stacey-Sigmar model for tokamak equilibrium as presented in the literature relies heavily on the neoclassical theory of the electrostatic field. Its neglect of Gauss's law is inconsistent with the potential formulation of electrodynamics. Its tre
Externí odkaz:
http://arxiv.org/abs/1401.7266
Autor:
Johnson, Robert W.
A transformation group approach to the prior for the parameters of the beta distribution is suggested which accounts for finite sets of data by imposing a limit to the range of parameter values under consideration. The relationship between the beta d
Externí odkaz:
http://arxiv.org/abs/1307.6437
Autor:
Johnson, Robert W.
Publikováno v:
Axioms 2013, 2(3), 286-310
The properties of the Gabor and Morlet transforms are examined with respect to the Fourier analysis of discretely sampled data. Forward and inverse transform pairs based on a fixed window with uniform sampling of the frequency axis can satisfy numeri
Externí odkaz:
http://arxiv.org/abs/1303.0306
Autor:
Johnson, Robert W.
The Bayesian approach to the prediction of particle type given measurements of particle location is explored, using a parametric model whose prior is based on the transformation group. Two types of particle are considered, and locations are expressed
Externí odkaz:
http://arxiv.org/abs/1208.3172
Autor:
Johnson, Robert W.
Publikováno v:
Phys. Plasmas 19, 062103 (2012)
The derivation of the helicon dispersion relation for a uniform plasma with stationary ions subject to a constant background magnetic field is reexamined in terms of the potential formulation of electrodynamics. Under the same conditions considered b
Externí odkaz:
http://arxiv.org/abs/1111.3661
Autor:
Johnson, Robert W.
Publikováno v:
Astrophysics and Space Science, Volume 338, Issue 1 (2012), Page 35-48
The principle of maximum entropy is applied to the spectral analysis of a data signal with general variance matrix and containing gaps in the record. The role of the entropic regularizer is to prevent one from overestimating structure in the spectrum
Externí odkaz:
http://arxiv.org/abs/1105.0446
Autor:
Johnson, Robert W.
The helicon antenna is a well-known device in the field of electric propulsion. Here we investigate the vector potential produced in vacuum by such an antenna with typical size parameters. Both a static and a dynamic analysis are performed. The dynam
Externí odkaz:
http://arxiv.org/abs/1104.5291