Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Osano, Bob"'
Autor:
Osano, Bob
This correspondence delves into the application of dynamical systems methodologies within the context of cosmology, specifically addressing a preliminary strategy for determining the range for the equation of state for dark energy ($\omega_{DE}$). Ou
Externí odkaz:
http://arxiv.org/abs/2409.07053
Autor:
Osano, Bob
We study two transition periods in cosmology: radiation-to-matter and matter-to-dark energy. In each case, we define a new parameter $\chi$ given by the ratios of the two energy densities involved in the transition. Our study of the second epoch is m
Externí odkaz:
http://arxiv.org/abs/2406.00506
Autor:
Osano, Bob
The evolution of the Universe is traditionally examined by monitoring how its material content evolves as it expands. This model of an isolated system is expressed as the equation of motion of the bulk but segmented into different epochs. In particul
Externí odkaz:
http://arxiv.org/abs/2002.08875
Autor:
Oreta, Timothy, Osano, Bob
In most of the literature on evolution of cosmological magnetic fields, it is found that large-scale magnetic fields evolve as $B^{2}\propto a^{-4}$ (adiabatic magnetic decay) where $a$ is the cosmological scale factor and $B$ is the cosmological mag
Externí odkaz:
http://arxiv.org/abs/1912.08712
Autor:
Ngwenya, Blessed Arthur, Osano, Bob
The Anthena Vortex Lattice (AVL) [1] program describes aerodynamic and flight-dynamic analysis of rigid aircraft of arbitrary configuration and we use it to analyse the stability modes of a Boeing 737-800 under various small perturbations about trimm
Externí odkaz:
http://arxiv.org/abs/1912.03099
Autor:
Osano, Bob
Publikováno v:
LHEP, Vol 3. No. 1 (2020)
This article extends the single-fluid relativistic irreversible thermodynamics theory of {\it M{\"u}ller}, {\it Israel} and {\it Stewart} (hereafter the {MIS} theory) to a multi-fluid system with inherent species interactions. This is illustrated in
Externí odkaz:
http://arxiv.org/abs/1906.01331
Autor:
Osano, Bob, Oreta, Timothy
This article presents the study of a multi-species fluid characterised by a freeze-out or break-away of one or more species. Whereas single-fluid approximation suffices for modelling of the pre {\it freeze-out} period, multi-fluid approximation is re
Externí odkaz:
http://arxiv.org/abs/1904.08670
Autor:
Osano, Bob, Oreta, Timothy
This article examines the foundation of the recently developed relativistic variational formalism[1]. Our work is heavily based on [2, 27] which extends this approach to the multi-fluid theory and examines its utility in astrophysics and cosmology. U
Externí odkaz:
http://arxiv.org/abs/1807.00768
Autor:
Osano, Bob
It is known that the cross product of gradients of two scalars, the Euler potentials (EP), may represent magnetic fields lines. We examine the utility of such potential in the broader magneto-genesis and dynamo theories, and find that a reinterpretat
Externí odkaz:
http://arxiv.org/abs/1612.00956
Autor:
Osano, Bob, Adams, Patrick W M
We present an ansatz for the relationship between magnetic flux density and fluid vorticity evolution equations. We also suggest that the magnetic flux density evolution equations be compared to the evolution equation for an effective vorticity ($\om
Externí odkaz:
http://arxiv.org/abs/1607.00980