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Symmetry, Volume 14, Issue 1

January 2022 - 181 articles

Cover Story: Liquid crystal director distributions have been numerically analyzed between asymmetric anchoring surfaces, that is, infinite strong and very weak anchoring surfaces in a hybrid aligned nematic (HAN) cell and a twisted nematic (TN) cell. When the weak anchoring strength is lower than a critical one, HAN and TN orientations turn to a homogeneous orientation. Such quasi-homogeneous orientations return to original HAN and TN orientations under the application of voltage. A unique voltage transmission curve of 0–100–0% appears in the quasi-homogeneous TN cell between crossed polarizers. View this paper
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Articles (181)

  • Article
  • Open Access
2 Citations
2,225 Views
19 Pages

17 January 2022

In this research, a novel adaptive frontier-assessment-based environment exploration strategy for search and rescue (SAR) robots is presented. Two neutrosophic WASPAS multi-criteria decision-making (MCDM) method extensions that provide the tools for...

  • Article
  • Open Access
1 Citations
2,675 Views
11 Pages

17 January 2022

In this paper, we study yrast states of two N=126 isotones 210Po and 212Rn using the nucleon-pair approximation with particle–hole excitations and using a low-momentum interaction Vlow–k renormalized from the free CD-Bonn NN potential. An...

  • Article
  • Open Access
26 Citations
5,148 Views
109 Pages

17 January 2022

This is a pedagogical introduction to the physics of confinement on R3×S1, using SU(2) Yang–Mills with massive or massless adjoint fermions as the prime example; we also add fundamental flavours to conclude. The small-S1 limit is remarkab...

  • Article
  • Open Access
16 Citations
2,780 Views
17 Pages

Symmetry, Confinement, and the Higgs Phase

  • Jeff Greensite and
  • Kazue Matsuyama

17 January 2022

We show that the Higgs and confinement phases of a gauge Higgs theory, with the Higgs field in the fundamental representation of the gauge group, are distinguished both by a broken or unbroken realization of the global center subgroup of the gauge gr...

  • Feature Paper
  • Article
  • Open Access
2,070 Views
11 Pages

On the Optimality of the LR Test for Mediation

  • Kees Jan Van Garderen and
  • Noud Van Giersbergen

17 January 2022

Testing for mediation, or indirect effects, is empirically very important in many disciplines. It has two obvious symmetries that the testing procedure should be invariant to. The ordered absolute t-statistics from two ordinary regressions are maxima...

  • Article
  • Open Access
2 Citations
3,419 Views
17 Pages

Analysis of Urban Visual Memes Based on Dictionary Learning: An Example with Urban Image Data

  • Ming Zhang,
  • Xin Gu,
  • Jun Xiao,
  • Pu Zou,
  • Zuoqin Shi,
  • Silu He,
  • Haifeng Li and
  • Sumin Li

17 January 2022

The coexistence of different cultures is a distinctive feature of human society, and globalization makes the construction of cities gradually tend to be the same, so how to find the unique memes of urban culture in a multicultural environment is very...

  • Article
  • Open Access
7 Citations
2,561 Views
15 Pages

17 January 2022

An image encryption and decryption algorithm based on Arnod transform and fractional chaos is proposed in this work for solving the problem that the encrypted image is easily cracked and the content of the decrypted image is distorted. To begin with,...

  • Article
  • Open Access
3 Citations
2,688 Views
23 Pages

16 January 2022

This paper proposes a modification of the imperialist competitive algorithm to solve multi-objective optimization problems with hybrid methods (MOHMICA) based on a modification of the imperialist competitive algorithm with hybrid methods (HMICA). The...

  • Article
  • Open Access
6 Citations
2,900 Views
23 Pages

16 January 2022

Software is a very important part to implement advanced information systems, such as AI and IoT based on the latest hardware equipment of the fourth Industrial Revolution. In particular, decision making for software upgrade is one of the essential pr...

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Symmetry - ISSN 2073-8994