Results 21 to 30 of about 37,780 (119)

Formalismo Hamiltoniano de los modelos de Bianchi con constante cosmológica

open access: yesRevista de Investigación de Física
La Radiación Cósmica de Fondo (CMB) ha dado como resultado anomalías o desviaciones con respecto al modelo estándar de la cosmología. En consecuencia, proponemos estudiar los espacio-tiempo de Bianchi con constante cosmológica aplicando el formalismo de
Mississippi Valenzuela
doaj   +1 more source

The role of spatial curvature in constraining the Universe anisotropies across a Big Bounce

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We study the implementation of Polymer Quantum Mechanics (PQM) to a system decomposed into a quasi-classical background and a small quantum subsystem, according to the original Vilenkin proposal.
Eleonora Giovannetti, Giovanni Montani
doaj   +1 more source

Bianchi Type I Cosmological Models in Eddington-inspired Born–Infeld Gravity

open access: yesGalaxies, 2014
We consider the dynamics of a barotropic cosmological fluid in an anisotropic, Bianchi type I space-time in Eddington-inspired Born–Infeld (EiBI) gravity.
Tiberiu Harko   +2 more
doaj   +1 more source

A classification of Bianchi Type I solutions via conformal vector fields and energy conditions in modified teleparallel gravity

open access: yesResults in Physics, 2023
The focus of this research is to investigate conformal vector fields (CVFs) of Bianchi type I space–times in modified teleparallel gravity (MTG). In order to determine such vector fields, we make a classification of said space–times.
Shabeela Malik   +5 more
doaj   +1 more source

Bianchi transformation of the Minding coil

open access: yesДифференциальная геометрия многообразий фигур
The work is devoted to the study of the Bianchi transform for surfac­es of constant negative Gaussian curvature. The surfaces of rotation of constant negative Gaussian curvature are the Mining top, the Minding coil, the pseudosphere (Beltrami surface ...
M. A. Cheshkova
doaj   +1 more source

Topological defects in a deformed gauge theory

open access: yesNuclear Physics B, 2017
In this paper, we will analyse the topological defects in a deformation of a non-abelian gauge theory using the Polyakov variables. The gauge theory will be deformed by the existence of a minimum measurable length scale in the background spacetime.
Mir Faizal, Tsou Sheung Tsun
doaj   +1 more source

DFT in supermanifold formulation and group manifold as background geometry

open access: yesJournal of High Energy Physics, 2019
We develop the formulation of DFT on pre-QP-manifold. The consistency conditions like section condition and closure constraint are unified by a weak master equation. The Bianchi identities are also characterized by the pre-Bianchi identity.
Ursula Carow-Watamura   +3 more
doaj   +1 more source

Colonial morphology of Escherichia coli: impact of detection in clinical specimens

open access: yesMicrobiologia Medica, 2016
As part of bacteriological identification, the macroscopic observation of the colonies on a culture medium is a critical step as it allows the clinical microbiologist to conduct a primary screening of microorganisms and in some cases even to identify ...
Lucia Barcella   +2 more
doaj   +1 more source

Antimicrobial Resistance and Virulence Factors Assessment in Escherichia coli Isolated from Swine in Italy from 2017 to 2021

open access: yesPathogens, 2023
Prudent antibiotic use in pigs is critical to ensuring animal health and preventing the development of critical resistance. We evaluated the antimicrobial resistance (AMR) pattern in commensal and enterotoxigenic Escherichia coli (ETEC) isolates obtained
Patrizia Bassi   +6 more
doaj   +1 more source

Anisotropic cosmology in q-deformed entropic gravity

open access: yesNuclear Physics B
In this work, we examine the implications of q-deformed theory on anisotropic Bianchi type-I cosmological model within the framework of Verlinde's entropic gravity.
Salih Kibaroğlu, Mustafa Senay
doaj   +1 more source

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