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Big Bang in dipole cosmology
Published 2025-01-01“…We thoroughly analyze evolution of the universe in this setting, particularly focusing on the behaviour near the Big Bang (BB). We first analyze a single fluid model with a generic constant equation of state w. …”
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Erratum to: Improved constraints on the variation of the weak scale from Big Bang nucleosynthesis
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Fronteras del mito, la filosofía y la ciencia. De los mitos cosmogónicos a la teoría del big bang
Published 2016-01-01Subjects: Get full text
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Dark Energy in Spherically Symmetric Universe Coupled with Brans-Dicke Scalar Field
Published 2019-01-01“…Here, it is seen that the dark energy triggers the big bang and after that much of the dark energy reduces to dark matter. …”
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Ekpyrotic Nongaussianity: A Review
Published 2010-01-01“…Ekpyrotic models and their cyclic extensions solve the standard cosmological flatness, horizon, and homogeneity puzzles by postulating a slowly contracting phase of the universe prior to the big bang. This ekpyrotic phase also manages to produce a nearly scale-invariant spectrum of scalar density fluctuations but, crucially, with significant nongaussian corrections. …”
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LRS Bianchi Type II Massive String Cosmological Models with Magnetic Field in Lyra's Geometry
Published 2013-01-01“…We find that the models start with a big bang at initial singularity and expansion decreases due to lapse of time. …”
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Testing a Dilaton Gravity Model Using Nucleosynthesis
Published 2014-01-01“…Big bang nucleosynthesis (BBN) offers one of the most strict evidences for the Λ-CDM cosmology at present, as well as the cosmic microwave background (CMB) radiation. …”
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Energy-Efficient Train Operation Using Nature-Inspired Algorithms
Published 2017-01-01“…Due to nonlinear optimization formulation of the problem, nature-inspired evolutionary search methods, Genetic Simulated Annealing, Firefly, and Big Bang-Big Crunch algorithms were employed in this study. …”
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Reheating after swampland conjecture
Published 2020-01-01“…Abstract The evolution of the universe started from a hot and dense Big Bang point. Temperature fluctuation map of cosmic microwave background (CMB) radiation and initial seeds of large scale structures (LSS) are explained by an inflationary period in a very early time. …”
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The role of order and disorder in thermal and material sciences part 2: Scientific world and new insights
Published 2003-01-01“…Alternative theory of reaction-diffusion model of the space-time is put in contrast with big bang hypothesis and related to the herewith-discussed specialty of self-catalyzed chemical reactions. …”
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Probes for 4th Generation Constituents of Dark Atoms in Higgs Boson Studies at the LHC
Published 2014-01-01“…Stable U- (anti-U)quarks of 4th generation, bound in stable colorless (U- U- U-) clusters, are captured by the primordial helium, produced in Big Bang Nucleosynthesis, thus forming neutral “atoms” of O-helium (OHe), a specific nuclear interacting dark matter that can provide solution for the puzzles of direct dark matter searches. …”
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Primordial Magnetic Field Effects on the CMB and Large-Scale Structure
Published 2010-01-01“…It is natural therefore to suppose that magnetic fields could be present in the turbulent high-temperature environment of the big bang. Such a primordial magnetic field (PMF) would be expected to manifest itself in the cosmic microwave background (CMB) temperature and polarization anisotropies, and also in the formation of large-scale structure. …”
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The Natural Science Underlying Big History
Published 2014-01-01“…A wealth of observational data supports the hypothesis that increasingly complex systems evolve unceasingly, uncaringly, and unpredictably from big bang to humankind. These are global history greatly extended, big history with a scientific basis, and natural history broadly portrayed across ∼14 billion years of time. …”
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Optimal Sizing of a Hybrid Renewable Photovoltaic-Wind System-Based Microgrid Using Harris Hawk Optimizer
Published 2022-01-01“…The efficacy of HHO is investigated, and its performance was compared with seven metaheuristic techniques, grasshopper optimization algorithm (GOA), cuckoo search optimizer (CSO), genetic algorithm (GA), Big Bang–Big Crunch (BBBC), coyote optimizer, crow search, and butterfly optimization algorithm (BOA), to attain the HRE microgrid optimal sizing based on annualized system cost (ASC) reduction. …”
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An Enhanced Semisteady-State Jaya Algorithm With a Control Coefficient and a Self-Adaptive Multipopulation Strategy
Published 2025-01-01“…When compared with the Snow Geese Algorithm (SGA), Big Bang–Big Crunch Algorithm (BBBCA), firefly algorithm (FA), bat algorithm (BA), cuckoo search algorithm (CSA), and flower pollination algorithm (FPA), the ESJaya algorithm gives competitive results in terms of obtaining optimum values, mean accuracy, and stability. …”
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Extensive composable entropy for the analysis of cosmological data
Published 2025-02-01“…An entropy is composable if it satisfies that the entropy SA of a system A=B×C consisting of two statistically independent parts B and C is given in a consistent way as SA=Φ(SB,SC) where the composition function Φ(x,y) is obtained from group-theory.We further show that (α,γ)=(1,2/3) satisfactorily agrees with cosmological data measuring neutrinos, Big Bang nucleosynthesis and the relic abundance of cold dark matter particles, as well as dynamical and geometrical cosmological data sets.…”
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Potential Technosignature from Anomalously Low Deuterium/Hydrogen in Planetary Water Depleted by Nuclear Fusion Technology
Published 2025-01-01“…Here, we suggest that anomalous D/H in planetary water below local ISM values of ∼16 × 10 ^−6 (set by Big Bang nucleosynthesis plus deuterium loss onto dust or small admixtures of deuterium-poor stellar material) may be a technosignature. …”
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