You are currently viewing a new version of our website. To view the old version click .

Symmetry, Volume 16, Issue 2

February 2024 - 122 articles

Cover Story: There is compelling evidence that the early universe underwent a quasi-de-Sitter expansion. Using the framework of the causal theory of relativistic hydrodynamics, we have studied quasi-de-Sitter inflation assisted by bulk viscosity and non-equilibrium effects, which may have been present in the early universe. The crucial outcomes are as follows: (a) the quasi-de-Sitter universe emerges as a natural consequence without adding any scalar field; (b) the equation of state becomes a time-dependent function. The figure shows the behavior of the equation of state and its departure from the exact de-Sitter universe where the timescale characterizing the departure is intricately related to the magnitude of the bulk viscosity, as shown here for two different values of the bulk viscosity. View this paper
  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
  • You may sign up for email alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.

Articles (122)

  • Article
  • Open Access
5 Citations
2,938 Views
16 Pages

19 February 2024

This paper introduces the novel IRS-based Optimal Relay Selection (ORS-IRS) method, aimed at analyzing the performance of wireless communication systems with an emphasis on symmetry. The ORS-IRS approach presents an innovative communication algorithm...

  • Article
  • Open Access
6 Citations
1,481 Views
18 Pages

Nonlinear Dynamics of a New Class of Micro-Electromechanical Oscillators—Open Problems

  • Nikolay Kyurkchiev,
  • Tsvetelin Zaevski,
  • Anton Iliev,
  • Vesselin Kyurkchiev and
  • Asen Rahnev

19 February 2024

In this paper, we propose a new class of micro-electromechanical oscillators. Some investigations based on Melnikov’s approach are applied for identifying some chaotic possibilities. We demonstrate also some specialized modules for investigatin...

  • Review
  • Open Access
3 Citations
2,176 Views
21 Pages

Analysis of B(s)0μ+μ Decays at the Large Hadron Collider

  • Kai-Feng Chen,
  • Titus Mombächer and
  • Umberto De Sanctis

18 February 2024

This article reviews the most recent measurements of B(s)0 → μ+μ− decay properties at the Large Hadron Collider (LHC) which are the most precise to date. The measurements of the branching fraction and effective lifetime of the Bs0 &r...

  • Article
  • Open Access
6 Citations
2,615 Views
25 Pages

18 February 2024

Numerical algorithms for calculating the left- and right-sided Riemann–Liouville fractional integrals and the left- and right-sided fractional derivatives in the Caputo sense using spline interpolation techniques are derived. The spline of the...

  • Article
  • Open Access
1,897 Views
12 Pages

18 February 2024

A model based on pure decoherence for the Jaynes–Cummings spin–boson system, coupled through its integral of motion to an infinite bosonic bath, is proposed and examined. The properties of the spin oscillation process suggest an initial e...

  • Article
  • Open Access
1,742 Views
19 Pages

17 February 2024

Industrial control terminals play an important role in industrial control scenarios. Due to the special nature of industrial control networks, industrial control terminal systems are vulnerable to malicious attacks, which can greatly threaten the sta...

  • Article
  • Open Access
27 Citations
4,289 Views
26 Pages

AntiPhishStack: LSTM-Based Stacked Generalization Model for Optimized Phishing URL Detection

  • Saba Aslam,
  • Hafsa Aslam,
  • Arslan Manzoor,
  • Hui Chen and
  • Abdur Rasool

17 February 2024

The escalating reliance on revolutionary online web services has introduced heightened security risks, with persistent challenges posed by phishing despite extensive security measures. Traditional phishing systems, reliant on machine learning and man...

  • Article
  • Open Access
2 Citations
1,775 Views
41 Pages

17 February 2024

The semi-inclusive cross-section of two-nucleon emission induced by neutrinos and antineutrinos is computed by employing the relativistic mean field model of nuclear matter and the dynamics of meson-exchange currents. Within this model, we explore a...

  • Article
  • Open Access
1 Citations
1,709 Views
11 Pages

17 February 2024

Sylvester-polynomial-conjugate matrix equations unify many well-known versions and generalizations of the Sylvester matrix equation AX−XB=C which have a wide range of applications. In this paper, we present a general approach to Sylvester-polyn...

  • Article
  • Open Access
4 Citations
1,718 Views
18 Pages

Chemically Modified Electrodes Based on 4-((5-Isopropyl-3,8-dimethylazulen-1-yl)methylene)-2-phenyloxazol-5(4H)-one

  • Alina-Giorgiana Brotea,
  • Ovidiu-Teodor Matica,
  • Cornelia Musina (Borsaru),
  • Andreea Madalina Pandele,
  • Roxana Trusca and
  • Eleonora-Mihaela Ungureanu

16 February 2024

Novel chemically modified electrodes (CMEs) based on azulene were prepared by electrooxidation of guaiazulene derivative 4-((5-isopropyl-3,8-dimethylazulen-1-yl)methylene)-2-phenyloxazol-5(4H)-one (G). G is based on guaiazulene non-alternating aromat...

of 13

Get Alerted

Add your email address to receive forthcoming issues of this journal.

XFacebookLinkedIn
Symmetry - ISSN 2073-8994Creative Common CC BY license