Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Alexander Gersten"'
Autor:
Amnon Moalem, Alexander Gersten
Publikováno v:
Entropy, Vol 23, Iss 9, p 1205 (2021)
Quantum equations for massless particles of any spin are considered in stationary uncharged axially symmetric spacetimes. It is demonstrated that up to a normalization function, the angular wave function does not depend on the metric and practically
Externí odkaz:
https://doaj.org/article/415806ac3f4045a1a7a7fa75ca55dbf6
A reliable spectral analysis requires sampling rate at least twice as large as the frequency bound, otherwise the analysis will be unreliable and plagued with aliasing distortions. The RR samplings do not satisfy the above requirements and therefore
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2e9dad7ba40f7162fc12c499520eff3
https://doi.org/10.5772/intechopen.85327
https://doi.org/10.5772/intechopen.85327
Autor:
Alexander Gersten, Amnon Moalem
Publikováno v:
Journal of Physics: Conference Series. 1956:012021
Quantum equations for massless particles of any spin in static spherically symmetric spacetimes, namely, the Minkowski, FRW and Schwarzschild spacetimes are considered. The metrics of all three are diagonal and their corresponding E2 2 and E3 3 inver
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::465ca425e1a985fc2302cbaf87f7eea0
https://doi.org/10.1088/1742-6596/1956/1/012021
https://doi.org/10.1088/1742-6596/1956/1/012021
Autor:
Alexander Gersten, Amnon Moalem
Publikováno v:
Journal of Physics: Conference Series. 1239:012018
Quantum equations for massless particles of any spin in curved spacetime are presented. These equations can be extended to a global spacetime from the ones derived in a flat spacetime. Here we demonstrate that these equations can be derived also from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d04993e23ac203627b57b6e83f776235
https://doi.org/10.1088/1742-6596/1239/1/012018
https://doi.org/10.1088/1742-6596/1239/1/012018
Autor:
Alexander Gersten, Amnon Moalem
Publikováno v:
Journal of Physics: Conference Series. 1239:012020
Fields and potentials of Maxwell’s Equations transform differently under the Lorentz transformation. Electric and magnetic fields are tridimensional objects which transform like massless fields as a subgroup of the Lorentz group. On the other hand,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3009ece8b7bcbf8fc04a48f0dead7ee8
https://doi.org/10.1088/1742-6596/1239/1/012020
https://doi.org/10.1088/1742-6596/1239/1/012020
Autor:
Amnon Moalem, Alexander Gersten
A simplified formalism of first quantized massless fields of any spin is presented. The angular momentum basis for particles of zero mass and finite spin s of the D^(s-1/2,1/2) representation of the Lorentz group is used to describe the wavefunctions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca80c8b59fd3c93abaf319bb222c215d
Publikováno v:
LASER THERAPY. 20:29-34
Background: Optical fibers are generally used with a flat cut end. The adaptation of a coaxial exit of a refrigerated gas near the distal tip of the optical fiber cools the tissue where the laser beam is applied and reduces the injury of thermal effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ae59c71e94cabce772553471b629a2f
https://doi.org/10.5978/islsm.20.29
https://doi.org/10.5978/islsm.20.29
Tensor Lagrangians, Lagrangians Equivalent to the Hamilton-Jacobi Equation and Relativistic Dynamics
Autor:
Alexander Gersten
Publikováno v:
Foundations of Physics. 41:88-98
We deal with Lagrangians which are not the standard scalar ones. We present a short review of tensor Lagrangians, which generate massless free fields and the Dirac field, as well as vector and pseudovector Lagrangians for the electric and magnetic fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cab7cf467a8e14d01b86ea9f9a3a2624
https://doi.org/10.1007/s10701-009-9352-3
https://doi.org/10.1007/s10701-009-9352-3
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 584:135-148
We report herein on a low-cost, high-performance dual imaging modality CT/SPECT system for small objects or animals. The system is realized from a commercial micro-focus X-ray tube, a Gd2O2S:Tb phosphor screen and a CCD camera. SPECT/planar imaging i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e99d503d1024ec2cdc00a708181b18c7
https://doi.org/10.1016/j.nima.2007.09.025
https://doi.org/10.1016/j.nima.2007.09.025
Autor:
Alexander Gersten
Publikováno v:
Infrared Spectroscopy-Anharmonicity of Biomolecules, Crosslinking of Biopolymers, Food Quality and Medical Applications
The fundamentals of near infrared spectroscopy (NIRS) are reviewed. Among the major factors controlling the cerebral blood flow (CBF), the effect of PaCO2 is peculiar in that it violates autoregulatory CBF mechanisms and allows to explore the full ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22c679d8728c1c7a241e393a5b5dff45
https://doi.org/10.5772/59113
https://doi.org/10.5772/59113