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Symmetry, Volume 13, Issue 7

July 2021 - 205 articles

Cover Story: The exceptional structure of azulene with symmetrical electron distribution, with respect to the x-axis, gives special physicochemical properties to compounds in which it is inserted compared to compounds containing the well-known naphthalene structure with a supplementary charge symmetrical with respect to the y-axis. In addition to the synthesis and the properties of such compounds, special attention is given to their technical use. Thus, the complexes of some azulene ligands with metals or some modified electrodes, realized by depositing a polyazulene film, play a role as heavy metal ion sensors. With this purpose, heterocycles substituted with azulenvinyl moiety, the compounds 1–6, were synthesized, and some compounds were used for building chemically modified electrodes for metal complexation. View this paper.
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Articles (205)

  • Article
  • Open Access
63 Citations
5,336 Views
54 Pages

Circuit Complexity from Cosmological Islands

  • Sayantan Choudhury,
  • Satyaki Chowdhury,
  • Nitin Gupta,
  • Anurag Mishara,
  • Sachin Panneer Selvam,
  • Sudhakar Panda,
  • Gabriel D. Pasquino,
  • Chiranjeeb Singha and
  • Abinash Swain

20 July 2021

Recently, in various theoretical works, path-breaking progress has been made in recovering the well-known page curve of an evaporating black hole with quantum extremal islands, proposed to solve the long-standing black hole information loss problem r...

  • Article
  • Open Access
2 Citations
2,057 Views
9 Pages

20 July 2021

Although describing very different physical systems, both the Klein–Gordon equation for tachyons (m2<0) and the Helmholtz equation share a remarkable property: a unitary and irreducible representation of the corresponding invariance group on a sui...

  • Article
  • Open Access
4 Citations
2,780 Views
29 Pages

20 July 2021

Radiative Transfer (RT) in a continuous spectrum in plasmas is caused by the emission and absorption of electromagnetic waves (EM) by free electrons. For a wide class of problems, the deviation of the velocity distribution function (VDF) of free elec...

  • Article
  • Open Access
1 Citations
2,855 Views
27 Pages

20 July 2021

More extensive enterprise cooperation is an effective means to increase the competitiveness of shipbuilding companies in the current distributed manufacturing environment. Most cross-enterprise collaborative processes for shipbuilding projects have b...

  • Article
  • Open Access
2 Citations
1,789 Views
12 Pages

20 July 2021

Let U=U(t,x) for (t,x)∈R+×Rd and ∂xU=∂xU(t,x) for (t,x)∈R+×R be the solution and gradient solution of the fourth order linearized Kuramoto–Sivashinsky (L-KS) SPDE driven by the space-time white noise in one-to-three dimensional spaces, respectively....

  • Article
  • Open Access
2 Citations
2,831 Views
21 Pages

20 July 2021

Canonical correlation analysis (CCA) is the default method for investigating the linear dependence structure between two random vectors, but it might not detect nonlinear dependencies. This paper models the nonlinear dependencies between two random v...

  • Review
  • Open Access
2 Citations
7,069 Views
21 Pages

Non-Coding RNAs and Reactive Oxygen Species–Symmetric Players of the Pathogenesis Associated with Bacterial and Viral Infections

  • Zaki Milhem,
  • Paul Chiroi,
  • Andreea Nutu,
  • Maximilian Ilea,
  • Mihaela Lupse,
  • Oana Zanoaga and
  • Ioana Berindan-Neagoe

20 July 2021

Infections can be triggered by a wide range of pathogens. However, there are few strains of bacteria that cause illness, but some are quite life-threatening. Likewise, viral infections are responsible for many human diseases, usually characterized by...

  • Article
  • Open Access
2 Citations
2,715 Views
10 Pages

19 July 2021

We introduce a new geometric constant Jin(X) based on a generalization of the parallelogram law, which is symmetric and related to the length of the inscribed quadrilateral side of the unit ball. We first investigate some basic properties of this new...

  • Article
  • Open Access
3 Citations
3,008 Views
14 Pages

19 July 2021

The task of pitch estimation is an essential step in many audio signal processing applications. In this paper, we propose a data-driven pitch estimation network, the Dual Attention Network (DA-Net), which processes directly on the time-domain samples...

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Symmetry - ISSN 2073-8994Creative Common CC BY license