{"title":"Harnessing expired XBAREN-150 for mild steel protection in acidic medium: a green chemistry perspective","authors":"Jasdeep Kaur, Akhil Saxena","doi":"10.1140/epjp/s13360-025-06843-7","DOIUrl":"10.1140/epjp/s13360-025-06843-7","url":null,"abstract":"<div><p>An experiment was conducted to determine whether expired XBAREN-150 could reduce the destruction of mild steel in 0.5 M sulphuric acid. Research aims to evaluate its inhibition efficiency, adsorption behavior, and environmental sustainability in industrial settings. Electrochemical analyses and weight loss tests, were utilized to find corrosion inhibition performance. Based on weight loss analysis, EIS results, and PDP results, XBAREN- 150 showed maximum inhibition efficiencies of 88.99%, 99.44%, and 97.10% at 400 ppm, respectively. According to adsorption studies, XBAREN-150 adheres to steel surfaces following the Langmuir isotherm model, affirming monolayer adsorption. The repurposing of expired XBAREN-150 to inhibit corrosion provides not only a sustainable option to conventional inhibitors, which are often toxic and environmentally hazardous, but it also reduces waste. Green chemistry and sustainable industrial practices are aligned with this eco-friendly approach because they reduce pharmaceutical waste and lower the impact of chemical inhibitor production.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The dynamics analysis and synchronization application of memristive HR neurons under novel electromagnetic radiation","authors":"Yilin Zhang, Jie Zhang","doi":"10.1140/epjp/s13360-025-06869-x","DOIUrl":"10.1140/epjp/s13360-025-06869-x","url":null,"abstract":"<div><p>Electromagnetic radiation is an inevitable presence in real-world environments,to further explore how electromagnetic radiation affects neuronal dynamics. This paper proposes a novel sigmoid-type memristor designed to simulate the impact of electromagnetic radiation on a 2D Hindmarsh–Rose (HR) neuron. Based on this, a new memristive HR neuron model under electromagnetic radiation is constructed. Theoretical and numerical analysis results indicate that the model exhibits rich hidden dynamics, including intermittent chaos, transient chaos, bias control and multistable self-replicating behaviors induced by rotational parameters. Furthermore, to verify the feasibility of the system, the memristive HR neuron model is implemented both in simulation and on a digital circuit platform. Finally, adaptive synchronization and backstepping synchronization methods are designed for the proposed model. Simulation results demonstrate that both methods achieve fast convergence and enable rapid synchronization control of the neurons. These approaches not only accelerate the dynamic response of the neurons but also significantly enhance the system's operational efficiency and performance.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ghulam Hussain Tipu, AllahBakhsh Yazdani Cherati, Hamid Momeni, Fengping Yao
{"title":"A novel hybrid analytical–PINNs approach for data-driven soliton dynamics and parameter discovery in the Kairat-II-X equation","authors":"Ghulam Hussain Tipu, AllahBakhsh Yazdani Cherati, Hamid Momeni, Fengping Yao","doi":"10.1140/epjp/s13360-025-06850-8","DOIUrl":"10.1140/epjp/s13360-025-06850-8","url":null,"abstract":"<div><p>This study presents a hybrid analytical and machine learning framework to investigate soliton dynamics in the recently proposed Kairat-II-X (K-II-X) equation, a model unifying features of the Kairat-II and Kairat-X systems. The equation captures geometric properties of differential curves relevant to physical and engineering phenomena. In the first phase, we employ novel polynomial expansion neural networks (PENNs), embedding trial functions into neural architectures where neurons represent polynomial–Riccati operator. This enables the generation of novel analytical soliton structures, including hyperbolic, trigonometric, exponential, and rational functions, in both single-soliton and two-soliton forms. In the second phase, we apply physics-informed neural networks (PINNs) with parameter regularization for numerical soliton solutions and parameter identification. The PINNs framework accurately captures one-kink, two-kink, and periodic dynamics, demonstrating strong agreement with analytical benchmarks and low error metrics. Furthermore, the method effectively recovers nonlinear coefficients from noisy data, highlighting robustness in parameter inference. This integrated symbolic–numeric approach bridges analytical solution construction and machine learning modeling, enhancing soliton solution discovery and providing a versatile platform for simulating complex nonlinear wave phenomena. The framework holds promising implications for applied mathematics, physics, and engineering. </p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modeling and analysis of new rogue wave solutions in a nonlinear left-handed electrical transmission line with the Josephson junction","authors":"Djidere Ahmadou, Houwe Alphonse, Mibaile Justin, Gambo Betchewe, Doka Yamigno Serge, Kofane Timoleon Crepin","doi":"10.1140/epjp/s13360-025-06857-1","DOIUrl":"10.1140/epjp/s13360-025-06857-1","url":null,"abstract":"<div><p>In electrical transmission systems, rogue waves, which are nonlinear phenomena, manifest as sudden and unpredictable voltage and current spikes. In this study, we propose new solution models for rogue waves propagating in a nonlinear electrical transmission line with a Josephson junction. To model the transmission line behavior and analyze the conditions for rogue wave formation, we used an approach based on nonlinear discrete differential equations and the Manakov system, and to formulate the expression for the modulational instability gain spectrum, linear stability was used. Our results show that the Josephson junction and the left-handed nature of this structure play crucial roles in the formation and propagation of these new rogue wave patterns and that the parameters of the Josephson junction and the electrical transmission line can be adjusted to control the occurrence of these phenomena. The Benjamin-Feir instability flourished in the electrical transmission line, and for decreasing the effects of the Josephson junction, the unstable modes increased. We observe an exponential growth of the continuous wave that appears for large values of the perturbed wavenumber, confirming that this structure is open to new coherent localized wave models. We also discuss the implications of our results for the design and management of nonlinear electrical-transmission systems.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dual-frequency layer-polarized topological interface states of shear horizontal guided wave in one-dimensional bilayer phononic crystals","authors":"Shu-Xin Zhang, Shao-Yong Huo, Zhi-Peng Jin","doi":"10.1140/epjp/s13360-025-06829-5","DOIUrl":"10.1140/epjp/s13360-025-06829-5","url":null,"abstract":"<div><p>In this paper, we investigate the existence of double interface states and layer polarization phenomena in one-dimensional (1D) topological bilayer phononic crystal plate (PCP). By constructing a bilayer PCP based on the double Su–Schrieffer–Heeger (DSSH) model, it is found that the dual-frequency topological interface states of shear horizontal (SH) wave can be realized in one common topological bandgap. Notably, we discover that by controlling gliding symmetry of the topological interfaces, the double topological interface states with two frequencies of 91.03 and 95.28 kHz are obtained in one common bandgap, both of which exhibit the fascinatingly layer-polarized phenomena. Compared with previous researches, this study achieved the generation of two interface states with different layer polarization at the same interface. Based on the obtained dual-frequency topological interface states, the dual-frequency rainbow trapping of the SH wave is successfully realized, in which the SH wave energy can be selectively captured in the upper or lower layer of PCP. This study provides a new perspective for the design of topological filtering devices and has potential applications in multi-frequency acoustic sensing and layer-polarized couplers.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vandana Barawal, Subhra Das, Jayanta Deb Mondol, Sudeshna Ghosh
{"title":"An analytical model to study post-collision motion of dust particles and their interaction with solar panel surfaces","authors":"Vandana Barawal, Subhra Das, Jayanta Deb Mondol, Sudeshna Ghosh","doi":"10.1140/epjp/s13360-025-06848-2","DOIUrl":"10.1140/epjp/s13360-025-06848-2","url":null,"abstract":"<div><p>This paper presents an analytical model to study the motion of dust particle post-collision with a solar panel in a semi-arid climate of Gurugram, Haryana, India. The particle moves under the action of various governing forces following the second law of motion. The equations of motions result in a system of nonlinear simultaneous differential equation of second order, specifically designed for modeling complex dynamical systems. The proposed model was simulated using Runge–Kutta method of order 4 and was found that particle size, wind speed and direction play an important role in post-collision dynamics of the dust particle. Not only that, it was also observed that environmental factors like relative humidity also affect post-collision dynamics. In very humid conditions, due to the strong effect of liquid bridge forces, the dust particle after collision deposits on the panel as compared to dry panel, and the particles bounce off from the panel after collision. The results were validated by comparing them with those obtained using MATLAB’s ‘ode45’ solver under identical conditions. The data obtained from a 185.6 kWp ground-mounted solar power plant at Amity University Haryana, Gurugram, India, were used to establish a correlation between the observed phenomenon and derived results based on such conditions. All the results obtained clearly indicate that the proposed algorithm provides high accuracy.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optical solutions and bifurcations of Kudryashov’s arbitrary refractive index along with generalized nonlocal nonlinearities","authors":"Hezha Hussni Abdulkareem, Hajar Farhan Ismael","doi":"10.1140/epjp/s13360-025-06836-6","DOIUrl":"10.1140/epjp/s13360-025-06836-6","url":null,"abstract":"<div><p>In this paper, a generalized nonlinear Schrödinger-type equation with higher-order nonlocal nonlinearities and Kudryashov’s arbitrary refractive index is studied. A wide range of physical phenomena, such as nonlinear optics, plasma dynamics, and wave propagation in dispersive media, are modeled by this equation. By applying a traveling wave transformation, the system is reduced to a singular planar dynamical system, which is subsequently regularized to facilitate a comprehensive bifurcation analysis. The equilibrium points are classified based on system parameters, and corresponding phase portraits are constructed to illustrate the qualitative dynamics across various bifurcation scenarios. The unified Riccati equation expansion method and the sine-Gordon expansion method are used to obtain explicit analytical soliton solutions, which are expressed in trigonometric and hyperbolic forms and capture a range of wave structures with different physical properties. Graphic representations in 2D and 3D are presented to illustrate the propagation dynamics. The results contribute to the current solution landscape of nonlocal nonlinear systems and provide new information on the Hamiltonian structure and bifurcation behavior of such singular wave models. To the best of our knowledge, the dynamical classification and exact solutions presented here are new and have not been published before.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. A. El-Shafeay, R. E. Tolba, R. Sabry, W. M. Moslem
{"title":"Insight into dust-ion-acoustic lump, stripe, and rogue waves via the Kadomtsev-Petviashvili model in the lunar ionosphere","authors":"N. A. El-Shafeay, R. E. Tolba, R. Sabry, W. M. Moslem","doi":"10.1140/epjp/s13360-025-06828-6","DOIUrl":"10.1140/epjp/s13360-025-06828-6","url":null,"abstract":"<div><p>Motivated by ARTEMIS <span>(P_2)</span> observations, we investigate the nonlinear dust-ion-acoustic waves in the nightside lunar ionosphere when the Moon is immersed in Earth’s magnetosphere. The plasma is modeled as a three-component system: magnetospheric ions, Maxwellian electrons, and negatively charged lunar dust grains. Using the reductive perturbation and Hirota’s bilinear method, we derive the Kadomtsev-Petviashvili equation and obtain various nonlinear wave structures, including lumps, stripes, and rogue waves. Numerical simulations show that the rogue waves can form due to the interaction between stripe and lump solitons, facilitating energy exchange between lunar dust and magnetospheric ions. Moreover, using the Fast Fourier Transform analysis, the results show that the electric field amplitude of the dust-ion-acoustic rogue waves reaches up to 15 mV/m, with a frequency range of 0.1–3 kHz and a pulse duration of approximately 0.15 s.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. S. Khachatryan, M. A. Mkrtchyan, D. B. Hayrapetyan, S. Baskoutas, C. S. Garoufalis, C. A. Duque, H. A. Sarkisyan
{"title":"Temperature influence on interband and intraband optical transitions in pyramidal quantum dot","authors":"K. S. Khachatryan, M. A. Mkrtchyan, D. B. Hayrapetyan, S. Baskoutas, C. S. Garoufalis, C. A. Duque, H. A. Sarkisyan","doi":"10.1140/epjp/s13360-025-06835-7","DOIUrl":"10.1140/epjp/s13360-025-06835-7","url":null,"abstract":"<div><p>In this paper, a study of intraband and interband optical transitions in a pyramidal QD is presented. The energy spectrum and wave functions of the problem are calculated analytically within the framework of the adiabatic approximation. Based on the obtained results, the interband absorption is investigated, taking into account the temperature dependence of the band gap and the spectral broadening of the absorption lines. Then, the linear and nonlinear intraband absorption within the matrix density approach is calculated. The temperature and geometric dependencies of the generations of the second (for a three-level system) and third (for a four-level system) harmonics in the system under study are studied.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reproducing and extending Brownian motion in optical traps: a computational reimplementation of Volpe and Volpe (2013)","authors":"Eyad I. B. Hamid","doi":"10.1140/epjp/s13360-025-06833-9","DOIUrl":"10.1140/epjp/s13360-025-06833-9","url":null,"abstract":"<div><p>We present an independent computational reimplementation of the model for Brownian motion in an optical trap, originally introduced by Volpe and Volpe (Am J Phys 81(3):224–230, 2013). Using an Euler–Maruyama finite difference scheme to integrate the Langevin equation in Python, we successfully reproduce key results including the transition from ballistic to diffusive motion, optical confinement, and velocity autocorrelation decay. Our implementation provides a quantitative validation of the original work. Furthermore, we extend the analysis to include rotational forces (Grier in Nature 424:810–816, 2003), Kramers transitions in a double-well potential (Hänggi et al. in Rev Mod Phys 62(2):251–341, 1990), and stochastic resonance. This study serves as a transparent, pedagogical resource, providing full code and a critical discussion on numerical methods for stochastic dynamics in computational physics education. The core trade-off of our chosen method clarity and simplicity versus the higher accuracy of advanced integrators is explicitly addressed.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 9","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}