Article
Green & Sustainable Science & Technology
N. Mbuli, W. S. Ngaha
Summary: This paper presents a survey on the application of the Big Bang Big Crunch algorithm in solving power system optimization problems. The authors found that the algorithm has been extensively used and researchers have introduced variants and hybrids to improve its capability.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Astronomy & Astrophysics
Bao-Fei Li, Parampreet Singh
Summary: Contrary to conventional wisdom, it is not easy to achieve a cyclic evolution in certain nonsingular cosmological models. This research shows that a modified version of loop quantum cosmology, based on Thiemann's regularization, does not allow a cyclic evolution unless highly restrictive conditions are met. Furthermore, the necessary condition for a cyclic evolution turns out to be a violation of the weak energy condition.
Article
Physics, Particles & Fields
Ignatios Antoniadis, Spiros Cotsakis, Dimitrios Trachilis
Summary: We have proposed a general asymptotic solution for modified gravity near a sudden singularity. This solution involves a fluid source without an equation of state and possesses eleven independent arbitrary functions tied to the spatial coordinates, in accordance with the Cauchy problem of the theory. Additionally, we demonstrate that the solution exhibits a shock wave-like behavior near the sudden singularity, with the same number of free functions in both the Jordan and Einstein frame.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
F. R. Klinkhamer, G. E. Volovik
Summary: This article discusses a particular type of quantum-vacuum variable q as a possible solution to the cosmological constant problem and its potential role as a cold-dark-matter component. Additionally, the author suggests a new interpretation of the big bang as a quantum phase transition between topologically inequivalent vacua.
Article
Physics, Multidisciplinary
M. A. Bakry, A. Eid, A. Alkaoud
Summary: In this study, a new model of the universe is presented based on a generalized form of the linearly varying deceleration parameter. The model exhibits oscillating expansion and contraction at different stages, behaving similarly to the conventional Big Bang model until the Big Rip. The model also predicts the future of the universe after the Big Rip and aligns with recent cosmological observations.
INDIAN JOURNAL OF PHYSICS
(2023)
Review
Multidisciplinary Sciences
Jose M. M. Senovilla
Summary: This article provides a brief overview of the main ideas behind singularity theorems and evaluates their hypotheses and implications. It dispels common misconceptions and discusses the nature of space-time extensions and singularities inside black holes.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Astronomy & Astrophysics
A. Bonanno, S. Silveravalle, A. Zuccotti
Summary: A new type of asymptotically flat wormhole, characterized by a Newtonian potential with a Yukawa correction in its outer spacetime and possessing a singularity at r = ??? in its internal spacetime, has been studied. Geodesics reaching this singularity exhibit a divergence in the expansion scalar in a finite amount of proper time, resembling the future singularity of the big rip cosmological scenario. These wormholes fill a large region of the parameter space of physical solutions.
Article
Physics, Multidisciplinary
R. D. Boko, I. G. Salako
Summary: This study explores two models of future infinite time singularities in f(T) theory and introduces the concept of viscosity. It is found that under different viscosity models, some singularities may be avoided while others cannot be avoided.
Article
Astronomy & Astrophysics
M. Mousavi, K. Atazadeh
Summary: The study examines future cosmological singularities in the context of massive gravity and minimal massive bigravity theory. It identifies sudden and big brake singularities in different cosmological models, noting that the sudden singularity can be eliminated when model parameters approach zero.
PHYSICS OF THE DARK UNIVERSE
(2022)
Article
Computer Science, Artificial Intelligence
Mehmet Ulas Koyuncuoglu, Leyla Demir
Summary: The BAP is an NP-hard combinatorial optimization problem with exponentially growing solution space. Two population-based search algorithms, CGA and BB-BC, were proposed to solve the BAP. Experimental results showed that BB-BC algorithm outperformed CGA and other algorithms.
JOURNAL OF INTELLIGENT MANUFACTURING
(2021)
Article
Physics, Particles & Fields
Igor Pesando
Summary: We discuss the failure of perturbative particle paradigm in certain backgrounds with space-like singularity but asymptotically flat, and argue for the existence of non-perturbative evolution operator. Furthermore, the complete breakdown of perturbative expansion in the covariant formalism in string theory is explained at least at the tree level.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
J. G. Cardoso
Summary: A highly torsional hot state at the early stages of cosmic evolution produced a dark matter cloud in the non-singular Trautman-Kopczynski big-bang creation. The combination of Einstein-Cartan's theory with the torsionful version of the two-component epsilon-formalism of Infeld and van der Waerden provides a natural local description of dark matter in terms of uncharged spin-one massive fields. The spinor field equation arises from the world Bianchi identity, and the information on the mass of the fields is extracted through prescribed derivatives of certain couplings involving the fields and spinor torsion.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Computer Science, Interdisciplinary Applications
Rathika Natarajan, Abolfazl Mehbodniya, Murugesan Ganapathy, Rahul Neware, Swimpy Pahuja, Luis Vives, Asha
Summary: This paper proposes a self-adaptive hybrid algorithm of big bang-big crunch (BB-BC) with ant colony optimization (ACO) for email spam detection, and it demonstrates its superiority over other techniques through experiments.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2022)
Article
Astronomy & Astrophysics
Tsung-Han Yeh, Keith A. Olive, Brian D. Fields
Summary: This study investigates the impact of new measurements of the d(p, gamma)He-3 cross section on Big Bang Nucleosynthesis (BBN), re-evaluating the thermal rate for the reaction and performing a likelihood analysis combining BBN and CMB data. The results show consistency between BBN theory, deuterium and He-4 observations, and the CMB when using the data-driven approach for reaction rates. Additionally, the new reaction data tightens constraints on the number of relativistic degrees of freedom during BBN.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Teodor Borislavov Vasilev, Mariam Bouhmadi-Lopez, Prado Martin-Moruno
Summary: We revise the future fate of kinetic gravity braiding models, a group of scalar-tensor theories. These models can drive the expansion of the universe towards a future de Sitter state if the Lagrangian is invariant under constant shifts in the scalar field. However, we show that future cosmic singularities characterized by a divergence of the energy density can also appear in this framework. We present an explicit example where a big rip singularity is the only possible future fate of the cosmos.
Article
Computer Science, Information Systems
Alicia Canton, Leonardo Fernandez-Jambrina
FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING
(2015)
Article
Physics, Multidisciplinary
L. Fernandez-Jambrina
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2016)
Article
Mathematics, Applied
A. Canton, L. Fernandez-Jambrina, E. Rosado Maria, M. J. Vazquez-Gallo
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2016)
Article
Mathematics, Applied
Leonardo Fernandez-Jambrina, Francisco Perez-Arribas
JOURNAL OF COMPUTATIONAL MATHEMATICS
(2020)
Article
Mathematics, Applied
A. Canton, L. Fernandez-Jambrina, M. J. Vazquez-Gallo
Summary: Farin (2006) proposed a method for designing Bezier curves with monotonic curvature and torsion, defining Class A curves and introducing new generation conditions without the requirement for eigenvalue conditions to be preserved under subdivision of the curve.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2021)
Article
Education, Scientific Disciplines
L. Fernandez-Jambrina
Summary: Integral theorems, such as Stokes' and Gauss', are fundamental in various fields of physics. The key is to ensure that the surface is orientable for the theorem to be applied accurately. Without orientability, calculating flux through the surface becomes a more complex issue.
EUROPEAN JOURNAL OF PHYSICS
(2021)
Article
Mathematics, Applied
Leonardo Fernandez-Jambrina
Summary: This paper provides a characterization of rational developable surfaces using the blossoms of bounding curves and three rational functions Lambda, M, nu. It presents a closed algebraic formula for the regression edge of the surface in terms of these functions. All rational developable surfaces can be described as the set of surfaces constructed with constant Lambda, M, nu. The results are also applicable to rational spline developable surfaces.
JOURNAL OF COMPUTATIONAL MATHEMATICS
(2021)
Article
Astronomy & Astrophysics
Leonardo Fernandez-Jambrina
Summary: This paper expands the analysis of singularities in scalar field cosmological models by using generalised power expansions to describe all possible models leading to a singularity and finding other possible cases. Unless a negative scalar field potential is considered, all singularities are weak and of type IV.
Article
Mathematics, Applied
Javier Sanchez-Reyes, Leonardo Fernandez-Jambrina
Summary: This paper investigates the relationship between the smoothness of pipes and offsets and the reach of their progenitor. The reach is a fundamental concept that determines the minimal distance between the progenitor and its cut locus. The study shows that under certain conditions, pipes and offsets can inherit the smoothness of their progenitor.
Review
Multidisciplinary Sciences
Leonardo Fernandez-Jambrina, Ruth Lazkoz
Summary: The article explores the different possible fates of the universe, including both singular and non-singular evolutions. The results are derived using generalized power and asymptotic expansions of the scale factor of the Universe.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Computer Science, Software Engineering
L. Fernandez-Jambrina
COMPUTER AIDED GEOMETRIC DESIGN
(2017)
Article
Astronomy & Astrophysics
L. Fernandez-Jambrina
Proceedings Paper
Computer Science, Theory & Methods
Alicia Canton, L. Fernandez-Jambrina, E. Rosado Maria, M. J. Vazquez-Gallo
CURVES AND SURFACES
(2015)
Proceedings Paper
Physics, Applied
Leonardo Fernandez-Jambrina
TOWARDS NEW PARADIGMS: PROCEEDING OF THE SPANISH RELATIVITY MEETING 2011
(2012)
