Physics Maths Engineering
Robert J Buenker Buenker
Robert J Buenker Buenker
Faculty of C-Mathematics and Natural Sciences, Bergische Universität Wuppertal,
rjbuenker@gmail.com
A number of the most often cited results of relativity theory deal with the relationships between energy, momentum and inertial mass. The history of how Einstein and Planck came to these conclusions is reviewed. It is pointed out that considerations of how the speed of light is affected by the motion of the Earth played a determining role in these developments. After the Michelson-Morley null-inte...
Posted 2 years ago
Physics Maths Engineering
Berov G Lyubomir
Berov G Lyubomir
Engineer, Independent Innovative Ideas Researcher, Smolyan 4700,
my_kaly1@mbox.contact.bg
The present, at any particular moment, is the realization of one of the many intentions of the All-creating Intellect. Here "realization" specifically means the materialization or the appearance of an object in the material world, which had not existed until now. This newly born material object exists only for the duration of the moment of "now". This moment is infinitely short, or, if we use a co...
Posted 2 years ago
Physics Maths Engineering
It is widely believed that Hawking radiation originates from excitations near the horizons of black holes [1,2,3]. However, Giddings [2] proposed that the Hawking radiation spectrum that characterizes evaporating semi-classical black holes originates from a quantum “atmosphere”, which extends beyond the horizon of a black hole. Although several research projects have been conducted in this fie...
Posted 2 years ago
Physics Maths Engineering
Kamila Sieja
Kamila Sieja
Institute Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (CNRS, UMR7178),
la.sieja@iphc.cnrs.fr
Neutron-rich Sr nuclei around N = 60 exhibit a sudden shape transition from a spherical ground state to strongly prolate-deformed. Recently, much new insight into the structure of Sr isotopes in this region has been gained through experimental studies of the excited levels, transition strengths, and spectroscopic factors. In this work, a “classic” shell model description of strontium
isotopes...
Posted 2 years ago
Physics Maths Engineering
In this paper we consider the correspondence between the tachyon dark energy model and the Tsallis holographic dark energy scenario in an FRW universe. We demonstrate the Tsallis holographic description of tachyon dark energy in an FRW universe and reconstruct the potential and basic results of the dynamics of the scalar field which describe the tachyon cosmology. In a flat universe, in the tachyo...
Posted 2 years ago
Physics Maths Engineering
Anand K. Bhatia
Anand K. Bhatia
Heliophysics Science Division, NASA/Goddard Space Flight Center,
d.k.bhatia@nasa.gov
The excitation cross-sections of the nS states of atomic hydrogen, n = 2 to 6, by electron
impact on the ground state of atomic hydrogen were calculated using the variational polarizedorbital method at various incident electron energies in the range 10 to 122 eV. Converged excitation
cross-sections were obtained using sixteen partial waves (L = 0 to 15). Excitation cross-sections to
2S state, ...
Posted 2 years ago
Physics Maths Engineering
We present an explicit formula of the powers for the 2×2 quantum matrices, that is a natural quantum analogue of the powers of the
usual 2 × 2 matrices. As applications, we give some non-commutative relations of the entries of the powers for the 2 × 2 quantum matrices, which is a simple proof of the results of Vokos-Zumino-Wess (1990)....
Posted 2 years ago
Muhamed Amin
Muhamed Amin
Department of Sciences, University College Groningen, University of Groningen, Hoendiepskade
m.a.a.amin@rug.nl
Serial Femtosecond Crystallography at the X-ray Free Electron Laser (XFEL) sources enabled the imaging
of the catalytic intermediates of the oxygen evolution reaction of Photosystem II. However, due to the
incoherent transition of the S-states, the resolved structures are a convolution from different catalytic states.
Here, we train Decision Tree Classifier and K-mean clustering models on Mn...
Posted 2 years ago
Physics Maths Engineering
In the article, the fireball formed in the collision of relativistic nuclei is considered as a quantum object. Based on this, an attempt is made to explain the difference in the measurements of hyperon yields in the two experiments - NA49 and NA57. Using the basic principles of quantum mechanics, it was shown that a fireball can have two quantum states - with and without ignited Quark-Gluon Plasma...
Posted 2 years ago
Physics Maths Engineering
Mohammad R. Garousi
Mohammad R. Garousi
Department of Physics, Faculty of Science, Ferdowsi University of Mashhad,
garousi@um.ac.ir
Recently, using the assumption that the string theory effective action at the critical dimension is background independent, the classical on-shell effective action of the bosonic string theory at order α in a spacetime manifold without boundary has been reproduced, up to an overall parameter, by imposing the O(1, 1) symmetry when the background has a circle. In the presence of the boundary, we co...
Posted 2 years ago