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135 Results Found

  • Article
  • Open Access
15 Citations
2,446 Views
6 Pages

5 April 2020

In this paper we carry out a complete Noether symmetry analysis of a generalized coupled Lane-Emden-Klein-Gordon-Fock system with central symmetry. It is shown that several cases transpire for which the Noether symmetries exist. Moreover, we derive c...

(This article belongs to the Special Issue New developments in Functional and Fractional Differential Equations and in Lie Symmetry)
  • Review
  • Open Access
2 Citations
7,647 Views
15 Pages

22 July 2010

Intrinsic dynamics of the central vestibular system (CVS) appear to be at least partly determined by the symmetries of its connections. The CVS contributes to whole-body functions such as upright balance and maintenance of gaze direction. These funct...

(This article belongs to the Special Issue Feature Papers: Symmetry Concepts and Applications)
  • Article
  • Open Access
12 Citations
5,333 Views
23 Pages

23 September 2020

Diverse butterfly wing color patterns are understood through the nymphalid groundplan, which mainly consists of central, border, and basal symmetry systems and a discal spot. However, the status of the discal spot remains unexplored. Here, the morpho...

(This article belongs to the Section Insect Physiology, Reproduction and Development)
  • Article
  • Open Access
1,416 Views
16 Pages

A Framework Designed with Perceptual Symmetry and Interactive Asymmetry for XR Collaboration

  • Gustavo Adolfo Murillo Gutierrez,
  • Rong Jin,
  • Juan-Pablo I. Ramirez-Paredes and
  • Uriel Haile Hernandez Belmonte

3 November 2025

Collaborative experiences are enriched through cross-platform interactions in the context of eXtended Reality (XR) systems. In this paper, we introduce SRVS-C (Spatially Referenced Virtual Synchronization for Collaboration), a centralized framework d...

(This article belongs to the Special Issue Symmetry/Asymmetry in Image Processing and Computer Vision Using Embedded Systems)
  • Review
  • Open Access
9 Citations
3,159 Views
31 Pages

14 May 2021

The spreading of the stationary states of the multidimensional single-particle systems with a central potential is quantified by means of Heisenberg-like measures (radial and logarithmic expectation values) and entropy-like quantities (Fisher, Shanno...

(This article belongs to the Special Issue Entropies, Divergences, Information, Identities and Inequalities)
  • Article
  • Open Access
1,415 Views
20 Pages

Experimental Validation of Pressure Losses in Centralized Compressed Air Systems: A Symmetry-Based Perspective on Industrial Optimization

  • Guillermo José Barroso García,
  • José Pedro Monteagudo Yanes,
  • Luis Angel Iturralde Carrera,
  • Carlos D. Constantino-Robles and ,
  • María del Consuelo Patricia Torres-Falcón,
  • Alejandro Flores-Rangel and
  • Juvenal Rodríguez-Reséndiz
  • + 2 authors+ 0 author

22 November 2025

The modernization of compressed air systems represents both a strategic challenge and an opportunity to achieve a balanced symmetry, understood as the equilibrium among energy efficiency, industrial optimization, and operational sustainability. This...

(This article belongs to the Special Issue Advances in Fluid Dynamics and Energy Systems: Applications of Symmetry and Asymmetry)
  • Article
  • Open Access
17 Citations
7,479 Views
25 Pages

6 January 2021

The nymphalid groundplan is an archetypical color pattern of nymphalid butterflies involving three major symmetry systems and a discal symmetry system, which share the basic morphogenesis unit. Here, the morphological and spatial relationships among...

(This article belongs to the Section Insect Physiology, Reproduction and Development)
  • Article
  • Open Access
1 Citations
816 Views
16 Pages

24 January 2026

Finding Noether symmetries for time-dependent damped dynamical systems remains a significant challenge. This paper introduces a complete geometric algorithm for determining all Noether point symmetries and first integrals for the general class of Lag...

(This article belongs to the Special Issue Feature Papers in 'Physics' Section 2025)
  • Article
  • Open Access
1 Citations
1,357 Views
20 Pages

22 February 2026

Applying a constant external electric field to a semiconductor nanostructure with Wannier–Mott excitons, in which the electron and hole interact via a centrally symmetric Coulomb potential, alters the symmetry of the system. When the electric f...

(This article belongs to the Special Issue Symmetry and Nonlinearity in Optics)
  • Article
  • Open Access
5 Citations
3,405 Views
18 Pages

11 April 2025

We present a theoretical and numerical study of soliton formation and dynamics in a Bose–Einstein condensate (BEC) confined within a symmetric harmonic trap, subjected to an external barrier potential. Our investigation focuses on the role of s...

(This article belongs to the Section C: Physics)
  • Article
  • Open Access
2 Citations
2,334 Views
14 Pages

The Topological Origin of Boundary Charges at Edges of One-Dimensional Crystals without Inversion Symmetry

  • Pengdong Shi,
  • Xingchao Qi,
  • Yufu Liu,
  • Xianjun Wang and ,
  • Langlang Xiong and
  • Xunya Jiang
  • + 1 author+ 0 author

30 August 2023

We report the edge states and non-zero boundary charges in one-dimensional photonic crystals (1D PhCs) without inversion symmetry. In contrast to common 1D systems, we show that edge states corresponding to non-zero boundary charges do exist in these...

  • Article
  • Open Access
2 Citations
6,669 Views
42 Pages

An Extended Detailed Investigation of First and Second Order Supersymmetries for Off-Shell N = 2 and N = 4 Supermultiplets

  • Sylvester James Gates,
  • James Parker,
  • Vincent G. J. Rodgers,
  • Leo Rodriguez and
  • Kory Stiffler

16 June 2015

This paper investigates the d = 4, N = 4 Abelian, global Super-Yang Mills system (SUSY-YM). It is shown how the N = 2 Fayet Hypermultiplet (FH) and N = 2 vector multiplet (VM) are embedded within. The central charges and internal symmetries provide a...

(This article belongs to the Special Issue Supersymmetry 2014)
  • Article
  • Open Access
8 Citations
4,121 Views
13 Pages

From Neural Command to Robotic Use: The Role of Symmetry/Asymmetry in Postural and Locomotor Activities

  • Mariève Blanchet,
  • Pierre Guertin,
  • Francine Pilon,
  • Philippe Gorce and
  • François Prince

24 September 2021

This article deepens a reflection on why and how symmetry/asymmetry affects the motor and postural behavior from the neural source, uterine development, child maturation, and how the notion of symmetry/asymmetry has been applied to walking robot desi...

(This article belongs to the Special Issue Neuroscience, Neurophysiology and Symmetry)
  • Article
  • Open Access
20 Citations
2,541 Views
22 Pages

15 November 2022

This article presents a theoretical study of the electronic, impurity-related, and nonlinear optical properties of CdS/ZnS quantum dots subjected to electric and magnetic fields. The magnetic field is applied along the z-axis, with the donor impurity...

(This article belongs to the Section Theory and Simulation of Nanostructures)
  • Article
  • Open Access
27 Citations
4,961 Views
28 Pages

A Bio-Inspired Polarization Sensor with High Outdoor Accuracy and Central-Symmetry Calibration Method with Integrating Sphere

  • Yinlong Wang,
  • Jinkui Chu,
  • Ran Zhang,
  • Jinshan Li and ,
  • Xiaoqing Guo and
  • Muyin Lin
  • + 1 author+ 0 author

7 August 2019

A bio-inspired polarization sensor with lenses for navigation was evaluated in this study. Two new calibration methods are introduced, referred to as “central-symmetry calibration” (with an integrating sphere) and “noncontinuous cal...

(This article belongs to the Special Issue Multi-Sensor Systems for Positioning and Navigation)
  • Feature Paper
  • Article
  • Open Access
600 Views
9 Pages

9 May 2026

Feedback delays and the coexistence of multiple timescales are central features of complex dynamical systems, ranging from neural networks and ecosystems to electronic and optical devices. Interactions between fast and slow dynamics can give rise to...

(This article belongs to the Special Issue Entropy-Based Time Series Analysis: Theory and Applications)
  • Article
  • Open Access
1,263 Views
28 Pages

16 June 2025

This paper investigates the distributed state estimation problem for the linear system against non-Gaussian noise, where every sensor commutates information only within its adjacent sensors without the need for a fusion center. Correntropy is a simil...

(This article belongs to the Section A: Computer Science)
  • Article
  • Open Access
2 Citations
1,506 Views
20 Pages

14 June 2025

This paper investigates a multi-sensor system for the state estimation of a maneuvering target, wherein the process noise of the target dynamics and the measurement noise of the sensor network are mutually correlated, and the measurement noises acros...

(This article belongs to the Section F: Engineering and Materials)
  • Article
  • Open Access
2 Citations
2,110 Views
13 Pages

7 September 2022

The setting is a system containing achiral reactants which form a chiral compound. In 1983, Kondepudi and Nelson proposed a model for the breaking of chiral symmetry. The present article reduces the conditions for bifurcation to a single condition wh...

  • Article
  • Open Access
24 Citations
7,505 Views
12 Pages

Pelvic Symmetry Is Influenced by Asymmetrical Tonic Neck Reflex during Young Children’s Gait

  • Ewa Gieysztor,
  • Anna Pecuch,
  • Mateusz Kowal,
  • Wojciech Borowicz and
  • Małgorzata Paprocka-Borowicz

Gait is one of the examined functions in child development. It should be economical and symmetrical. One test increasingly used by physiotherapists and pediatricians is asymmetrical tonic neck reflex (ATNR). Physiologically, it is observed from in ut...

(This article belongs to the Section Children's Health)
  • Article
  • Open Access
3 Citations
3,229 Views
11 Pages

Local and Non-Local Invasive Measurements on Two Quantum Spins Coupled via Nanomechanical Oscillations

  • Dimitrios Maroulakos,
  • Levan Chotorlishvili,
  • Dominik Schulz and
  • Jamal Berakdar

1 July 2020

Symmetry plays the central role in the structure of quantum states of bipartite (or many-body) fermionic systems. Typically, symmetry leads to the phenomenon of quantum coherence and correlations (entanglement) inherent to quantum systems only. In th...

(This article belongs to the Special Issue Quantum Information and Condensed Matter Physics)
  • Article
  • Open Access
2 Citations
710 Views
27 Pages

Mathematical Formulation of a Symmetry-Compact Three-Step Algorithm for Computing the Spatio-Temporal Generalized FitzHugh–Nagumo Equations

  • Joshua Sunday,
  • Ezekiel Olaoluwa Omole,
  • Roseline Bosede Ogunrinde,
  • Geoffrey Micah Kumleng and ,
  • Olabode Oludare Bamisile and
  • Olakunle Oluwaseyi Kayode
  • + 1 author+ 0 author

10 February 2026

This study presents the mathematical formulation of a symmetry-compact three-step algorithm (TSA) for the numerical computation of the spatio-temporal generalized FitzHugh–Nagumo equation (FHNE), a class of one-dimensional time-dependent initia...

(This article belongs to the Section B: Mathematics)
  • Review
  • Open Access
13 Citations
8,180 Views
23 Pages

27 April 2021

This review discusses molecular adducts, whose composition allows a symmetric structure. Such adducts are popular model systems, as they are useful for analyzing the effect of structure on the property selected for study since they allow one to reduc...

(This article belongs to the Special Issue Exploring Inter- and Intramolecular Interactions as Building Blocks of Larger Systems)
  • Article
  • Open Access
2 Citations
1,095 Views
16 Pages

From Invariance to Symmetry Breaking in FIM-Aware Cooperative Heterogeneous Agent Networks

  • Jihua Dou,
  • Kunpeng Ouyang,
  • Zefei Wu,
  • Zhixin Hu and ,
  • Jianxin Lin and
  • Huachuan Wang
  • + 1 author+ 0 author

7 November 2025

We recast cooperative localization and scheduling in heterogeneous multi-agent systems through the lens of symmetry and symmetry breaking. On the geometric side, the Fisher Information Matrix (FIM) objective is invariant to rigid Euclidean transforma...

(This article belongs to the Special Issue Advances in Machine Learning with Symmetry/Asymmetry in Transportation)
  • Article
  • Open Access
2 Citations
1,231 Views
12 Pages

Dynamic Survivability Centrality in Nonlinear Oscillator Systems

  • Yuexin Wang,
  • Zhongkui Sun,
  • Sijun Ye,
  • Tao Zhao and ,
  • Xinshuai Zhang and
  • Wei Xu
  • + 1 author+ 0 author

16 December 2024

In light of the fact that existing centrality indexes disregard the influence of dynamic characteristics and lack generalizability due to standard diversification, this study investigates dynamic survivability centrality, which enables quantification...

(This article belongs to the Topic Nonlinear Phenomena, Chaos, Control and Applications to Engineering and Science and Experimental Aspects of Complex Systems)
  • Article
  • Open Access
1,318 Views
26 Pages

24 November 2025

Strategic foresight often involves navigating deeply uncertain futures through scenario-based reasoning. Traditional methods rely on static narratives or probabilistic models, which fail to capture the dynamic, interacting, and nonexclusive nature of...

(This article belongs to the Special Issue Simulation and Modelling in Natural Sciences, Biomedicine and Engineering III)
  • Article
  • Open Access
2 Citations
2,999 Views
18 Pages

Numerical Solution of Nonlinear Problems with Multiple Roots Using Derivative-Free Algorithms

  • Sunil Kumar,
  • Janak Raj Sharma,
  • Jai Bhagwan and
  • Lorentz Jäntschi

12 June 2023

In the study of systems’ dynamics the presence of symmetry dramatically reduces the complexity, while in chemistry, symmetry plays a central role in the analysis of the structure, bonding, and spectroscopy of molecules. In a more general contex...

(This article belongs to the Section D: Chemistry: Symmetry/Asymmetry)
  • Feature Paper
  • Article
  • Open Access
9 Citations
3,377 Views
19 Pages

New Formulations on Kinetic Energy and Acceleration Energies in Applied Mechanics of Systems

  • Iuliu Negrean,
  • Adina Crișan,
  • Florina Șerdean and
  • Sorin Vlase

27 April 2022

Multibody mechanical systems (i.e., serial, and parallel robots) have a wide range of applications in the industrial field. In technological processes, these systems perform mechanical movements, in which the active forces have a certain time variati...

(This article belongs to the Special Issue Symmetry in Theoretical and Applied Mechanics)
  • Article
  • Open Access
6 Citations
1,718 Views
27 Pages

Methodology for Solving Engineering Problems of Burgers–Huxley Coupled with Symmetric Boundary Conditions by Means of the Network Simulation Method

  • Juan Francisco Sánchez-Pérez,
  • Fulgencio Marín-García,
  • Enrique Castro,
  • Gonzalo García-Ros and ,
  • Manuel Conesa and
  • Joaquín Solano-Ramírez
  • + 1 author+ 0 author

11 September 2023

The Burgers–Huxley equation is a partial differential equation which is based on the Burgers equation, involving diffusion, accumulation, drag, and species generation or sink phenomena. This equation is commonly used in fluid mechanics, air pol...

(This article belongs to the Special Issue Differential Equations and Applied Mathematics)
  • Article
  • Open Access
8 Citations
4,235 Views
12 Pages

22 November 2021

Photonic topological materials with a broken time-reversal symmetry are characterized by nontrivial topological phases, such that they do not support propagation in the bulk region but forcibly support a nontrivial net number of unidirectional edge-s...

(This article belongs to the Section C: Physics)
  • Review
  • Open Access
22 Citations
9,728 Views
44 Pages

2 October 2021

Symmetry forms the foundation of combinatorial theories and algorithms of enumeration such as Möbius inversion, Euler totient functions, and the celebrated Pólya’s theory of enumeration under the symmetric group action. As machine learning and artifi...

(This article belongs to the Section D: Chemistry: Symmetry/Asymmetry)
  • Article
  • Open Access
398 Views
14 Pages

3 August 2026

Highly polarized 3He is widely used in precision magnetometry, neutron spin filtering, and fundamental symmetry tests, where magnetic field gradients can shorten relaxation and coherence times and introduce systematic uncertainties. We present the de...

(This article belongs to the Section Physical Sensors)
  • Article
  • Open Access
42 Citations
13,398 Views
10 Pages

18 March 2009

Experimental data for a series of central and simple molecules in biosystems show that some amino acids and a simple sugar molecule have a chiral discrimination in favor of homochirality. Models for segregation of racemic mixtures of chiral amphiphil...

(This article belongs to the Special Issue Origin of Life)
  • Feature Paper
  • Article
  • Open Access
7 Citations
4,412 Views
19 Pages

18 September 2020

We construct a microscopic model to study discrete randomness in bistable systems coupled to an environment comprising many degrees of freedom. A quartic double well is bilinearly coupled to a finite number N of harmonic oscillators. Solving the time...

(This article belongs to the Section Non-equilibrium Phenomena)
  • Article
  • Open Access
18 Citations
4,376 Views
15 Pages

Symmetry in Blockchain-Powered Secure Decentralized Data Storage: Mitigating Risks and Ensuring Confidentiality

  • Iuon-Chang Lin,
  • Yi-Hsuan Kuo,
  • Ching-Chun Chang,
  • Jui-Chuan Liu and
  • Chin-Chen Chang

26 January 2024

In today’s digital landscape, the exponential growth of data heightens security risks associated with traditional centralized storage systems. Utilizing blockchain technology, a shift towards decentralized data storage provides a more secure an...

  • Article
  • Open Access
14 Citations
6,479 Views
27 Pages

Implementation of Artificial Intelligence for Classification of Frogs in Bioacoustics

  • Kuo-Wei Chao,
  • Nian-Ze Hu,
  • Yi-Chu Chao,
  • Chin-Kai Su and
  • Wei-Hang Chiu

26 November 2019

This research presents the implementation of artificial intelligence (AI) for classification of frogs in symmetry of the bioacoustics spectral by using the feedforward neural network approach (FNNA) and support vector machine (SVM). Recently, the sym...

  • Article
  • Open Access
540 Views
34 Pages

23 June 2026

This paper presents a comparative evaluation of quarter-car-model-based modular synthesis (QCMS) and full-car-based centralized synthesis (FCCS) for active suspension control in full-car systems. FCCS explicitly accounts for the coupled vertical, pit...

(This article belongs to the Special Issue Symmetry-Inspired Approaches in Control, Robotics, and Intelligent Systems)
  • Feature Paper
  • Article
  • Open Access
6 Citations
3,738 Views
13 Pages

Ultra-Narrow Bandwidth Microwave Photonic Filter Implemented by Single Longitudinal Mode Parity Time Symmetry Brillouin Fiber Laser

  • Jiaxin Hou,
  • Yajun You,
  • Yuan Liu,
  • Kai Jiang and ,
  • Xuefeng Han,
  • Wenjun He,
  • Wenping Geng,
  • Yi Liu and
  • Xiujian Chou
  • + 4 authors+ 0 author

27 June 2023

In this paper, a novel microwave photonic filter (MPF) based on a single longitudinal mode Brillouin laser achieved by parity time (PT) symmetry mode selection is proposed, and its unparalleled ultra-narrow bandwidth as low as to sub-kHz together wit...

(This article belongs to the Section A: Physics)
  • Article
  • Open Access
7 Citations
3,864 Views
31 Pages

A Comprehensive Literature Review on Artificial Dataset Generation for Repositioning Challenges in Shared Electric Automated and Connected Mobility

  • Antoine Kazadi Kayisu,
  • Witesyavwirwa Vianney Kambale,
  • Taha Benarbia,
  • Pitshou Ntambu Bokoro and
  • Kyandoghere Kyamakya

21 January 2024

In the near future, the incorporation of shared electric automated and connected mobility (SEACM) technologies will significantly transform the landscape of transportation into a sustainable and efficient mobility ecosystem. However, these technologi...

(This article belongs to the Special Issue Simulation and Modelling in Natural Sciences, Biomedicine and Engineering III)
  • Article
  • Open Access
3 Citations
910 Views
19 Pages

Improved Trust Evaluation Model Based on PBFT and Zero Trust Integrated Power Network Security Defense Method

  • Xiaoyun Liao,
  • Sen Yang,
  • Jun Xu,
  • Li Liu and ,
  • Wei Liang,
  • Shengjie Yu,
  • Yimu Ji and
  • Shangdong Liu
  • + 3 authors+ 0 author

16 November 2025

In traditional power networks, security protection models primarily rely on perimeter-based defenses, utilizing firewalls, virtual private networks (VPNs), and identity authentication to block external threats. However, once a node within the power s...

(This article belongs to the Special Issue Symmetry and Asymmetry in Data Analysis)
  • Review
  • Open Access
11 Citations
6,131 Views
34 Pages

18 September 2021

The symmetry SU(2) and its geometric Bloch Sphere rendering have been successfully applied to the study of a single qubit (spin-1/2); however, the extension of such symmetries and geometries to multiple qubits—even just two—has been investigated far...

(This article belongs to the Special Issue Symmetry in Quantum Systems)
  • Article
  • Open Access
6 Citations
3,166 Views
12 Pages

4 November 2021

In this paper, we propose a CPG (central pattern generator) network control system using motor dynamics for the gait planning of a quadruped robot with a trot walking pattern to climb up and down a slope and turn back and follow the symmetry of route...

  • Article
  • Open Access
1 Citations
2,265 Views
8 Pages

3 August 2022

A central conundrum enshrouds biocognition: almost all such phenomena are inherently unstable and must be constantly controlled by external regulatory machinery to ensure proper function, in much the same sense that blood pressure and the ‘stre...

(This article belongs to the Section Complexity)
  • Article
  • Open Access
9 Citations
5,828 Views
20 Pages

Suitability of a Consensual Fuzzy Inference System to Evaluate Suppliers of Strategic Products

  • Nazario Garcia,
  • Javier Puente,
  • Isabel Fernandez and
  • Paolo Priore

10 January 2018

This paper designs a bidding and supplier evaluation model focused on strategic product procurement, and develops their respective evaluation knowledge bases. The model is built using the most relevant variables cited in the reviewed procurement lite...

(This article belongs to the Special Issue Symmetry in Fuzzy Sets and Systems)
  • Article
  • Open Access
7 Citations
3,470 Views
18 Pages

15 August 2020

Based on conditional past–future (CPF) correlations, we study the non-Markovianity of a central spin coupled to an isotropic Lipkin–Meshkov–Glick (LMG) bath. Although the dynamics of a system is always non-Markovian, it is found tha...

  • Article
  • Open Access
3 Citations
2,072 Views
13 Pages

25 February 2022

This paper investigates the nonlinear dynamics of Transmission Control Protocol and Active Queue Management (TCP/AQM) networks, including the local stability and periodic bifurcation. The parameter of transportation delay affects the stability of the...

(This article belongs to the Section B: Mathematics)
  • Article
  • Open Access
1 Citations
1,381 Views
48 Pages

2 September 2025

Energy conservation, rooted in the time invariance of physical laws and formalized by Noether’s theorem, requires that systems with space-time translational symmetry conserve momentum and energy. This work examines how this principle applies to...

(This article belongs to the Special Issue Development of Energy Harvesting Systems and Methods from Uncommon Sources: 2nd Edition)
  • Article
  • Open Access
1,034 Views
27 Pages

16 March 2026

This study proposes a theoretical–empirical framework for analyzing political regimes based on a structural analogy between electoral behavior and spin-glass systems in statistical physics. Society is modeled as a system of interacting agents (...

(This article belongs to the Section Systems Practice in Social Science)
  • Article
  • Open Access
6 Citations
4,374 Views
16 Pages

24 January 2025

The off-axis reflective optical system offers several advantages, including the elimination of central obstruction, zero chromatic aberration, and a compact structure. These features make it highly valuable in the domain of space remote sensing. Free...

  • Article
  • Open Access
5 Citations
4,549 Views
29 Pages

New Syntheses, Analytic Spin Hamiltonians, Structural and Computational Characterization for a Series of Tri-, Hexa- and Hepta-Nuclear Copper (II) Complexes with Prototypic Patterns

  • Ana Maria Toader,
  • Maria Cristina Buta,
  • Fanica Cimpoesu,
  • Andrei-Iulian Toma and ,
  • Christina Marie Zalaru,
  • Ludmila Otilia Cinteza and
  • Marilena Ferbinteanu
  • + 2 authors+ 0 author

15 March 2021

We present a series of pyrazolato-bridged copper complexes with interesting structures that can be considered prototypic patterns for tri-, hexa- and hepta- nuclear systems. The trinuclear shows an almost regular triangle with a μ3-OH central group....

(This article belongs to the Special Issue Coordination Polymers and Metal-Organic Frameworks: Structures and Applications—A Themed Issue in Honor of Professor Christoph Janiak on the Occasion of His 60th Birthday)

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