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A method for human behavior identification based on integrated sensor data using XGBoost classifier with PCA techniques Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Divya Thakur and Praveen Lalwani
In recent decades, there has been a noticeable increase in the recognition among professionals of the importance of human acts. The identification of human activity has gained significant prominence because of its wide-ranging applications in several domains, including healthcare and recreational activities. Moreover, a substantial body of research in the field of machine learning has been dedicated
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A holistic approach of strain-induced and spin-orbit coupling governed structural, optical, electrical and phonon properties of Janus MoSSe heterostructure via DFT theory Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Farah B H Pritu, Md Rasidul Islam, Nusrat Jahan, Nourin Arobi and M Mahbubur Rahman
Spintronics and optoelectronic equipment benefit from efficient modification of electrical and optical characteristics for Van der Waals heterostructures. Janus MoSSe, in two dimensions, has superior electronic, optical, and phonon properties. Based on these characteristics, we evaluate the effects of biaxial compressive and tensile strain ranges of −6% to +6% on the structural, optical, spin–orbit
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Design principles of voltage controlled DC-DC boost converters through the integration of PID and model predictive control Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Srishti, Prabin Kumar Padhy and Dip Prakash Samajdar
This paper presents the design of the transfer function between the control and output variable of a DC-DC boost converter using a combination of Proportional Integral Derivative (PID) and output-based Model Predictive Control (MPC) mechanisms for eradicating the effect of the non-minimum phase (NMP) behavior on the system. This is made possible due to the existence of a right half plane (RHP) zero
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Compression and fretting wear studies of γ/α 2 duplex TiAl alloys at the nanoscale Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Min Zheng, Jianfeng Han, Dingfeng Qu, Weihua Chen, Yuhang Sun, Jie Chen and Zongxiao Zhu
The study investigated the nanofabrication behavior of TiAl alloys with a duplex structure of γ/α2. The process included downward pressure followed by reciprocating friction with diamond grinding balls and was simulated using molecular dynamics (MD). It was found that a certain number of dislocations in the workpiece was low, and the resilience was high during the initial pressing stage. The dislocations
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Prepotential approach: a unified approach to exactly, quasi-exactly, and rationally extended solvable quantal systems Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Choon-Lin Ho
We give a brief overview of a simple and unified way, called the prepotential approach, to treat both exact and quasi-exact solvabilities of the one-dimensional Schrödinger equation. It is based on the prepotential together with Bethe ansatz equations. Unlike the the supersymmetric method for the exactly-solvable systems and the Lie-algebraic approach for the quasi-exactly solvable problems, this approach
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Color image encryption algorithm based on novel dynamic DNA encoding and chaotic system* Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Dingkang Mou and Yumin Dong
To enhance the security of image data, prevent unauthorized access, tampering, and leakage, maintain personal privacy, protect intellectual property rights, and ensure the integrity of images during transmission and storage. This study introduces an innovative color image encryption scheme based on dynamic DNA encoding operations and chaotic systems. By simulating a quantum random walk, a random key
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Impact resistance analysis of a dual-constituent negative Poisson's ratio lattice metamaterial with tailorable coefficient of thermal expansion Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Yanzhang Dong, Qingfeng Li, Feidie Cui, Liang Bai and Weikai Xu
The combination of parameters such as negative Poisson's ratio (NPR) and negative coefficient of thermal expansion (NCTE) can result in novel materials with specialized functions to meet the requirements of multifunctional and multipurpose devices. However, the additional structural design to meet NCTE requires a re-examination of its impact resistance. In this paper, the deformation modes and impact
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Design of a broadband multifunctional switchable absorber/reflector based on active frequency selective surfaces Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Ling Zhao, Jiayun Wang, Yulong Gao, Linyue Chen, Zeng Qu, Junping Duan and Binzhen Zhang
Metamaterial absorbers are candidates for stealth systems due to their excellent wave modulation capabilities. With the rapid development of radar detection technology, the switching ability of metamaterial absorbers is becoming more demanding. A broadband multifunctional switchable absorber/reflector based on active frequency selective surfaces (AFSS) is presented in this paper. The proposed structure
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The guiding center role in defining the eigenstates of an electron in the fractional quantum Hall effect regime: ladder operators approach Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Z Bentalha
The quantum problem of a two-dimensional electron in a uniform perpendicular magnetic field is considered. Using the formalism of ladder operators, the electron eigenfunctions are derived for all quantum numbers n and m, where n denotes the Landau level and m the eigenvalue of the angular momentum Lz, with m taking all possible eigenvalues. We note that existing one-electron orbitals, in most of the
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Phase transformation mechanism of nominal Si(001) surface driven by hydrogen thermal annealing Phys. Scripta (IF 2.9) Pub Date : 2024-04-25 Qing Ge, Jun Wang, Feng Lin, Shuaicheng Liu, Hao Zhai, Weiyu He, Yiming Bai, Yongqing Huang and Xiaomin Ren
Herein, we report the phase transformation mechanism of the nominal Si(001) surface driven by hydrogen thermal annealing. The surface energies of H-terminated Si(001) surface with different phase structures were calculated by density functional theory. The results show that the surface phase with monoatomic steps can transform into the surface phase with diatomic steps under proper ranges of hydrogen
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Taking into consideration a fifth-order nonlinear Schrödinger equation in an optical fiber Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Meng Wang, Yan-Fei Yang, Lan-Hua Chen and Si-Ru Zhu
In this paper, symbolic computation on a fifth-order nonlinear Schrödinger equation is done, for the attosecond pulses propagation in an optical fiber. With respect to the complex amplitude of the optical pulse envelope, we work out a Lax pair and derive the modified generalized Darboux transformation. Then, we give the semirational solutions via the modified generalized Darboux transformation method
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A view of solitary wave solutions to the fractional DNA Peyrard-Bishop equation via a new approach Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Ayten Özkan
In this study, the fractional impacts of the beta derivative and M-truncated derivative are examined on the DNA Peyrard-Bishop dynamic model equation. To obtain solitary wave solutions for the model, the Sardar sub-equation approach is utilized. For a stronger comprehension of the model, the acquired solutions are graphically illustrated together with the fractional impacts of the beta and M-truncated
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Robust 3D coordinate transformation based on genetic algorithm intelligent weighting Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 QiuYu Zhang, XiaoYe He, Wei Wang, EnChen Wu, Xiao Li and Ting Ding
In order to improve the solution quality of 3D coordinate transformation parameters, a robust optimization model is obtained by integrating the 3D coordinate transformation model within the overall framework of the genetic algorithm in this paper. The minimum of the weighted sum of squares of the point residuals of the common points is taken as the objective function for optimization, and the parallel
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On the relative abundances of Cavansite and Pentagonite Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Bhalchandra S Pujari, Sagar Gehlot, Mihir Arjunwadkar, Dilip G Kanhere and Raymond A Duraiswami
Cavansite is a visually stunning blue vanadosilicate mineral with limited occurrences worldwide, whereas Pentagonite is a closely related dimorph with similar physical and chemical properties, yet is extremely rare compared to Cavansite. The reasons behind Pentagonite's exceptional rarity remain largely unknown. In this study, (a) density functional theory (DFT) is utilized to investigate the electronic
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Optical and photoluminescence properties of trivalent rare earth ions doped LiMgPO4 Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Mudasir Farooq, Haqnawaz Rafiq, Mir Hashim Rasool, Irfan Nazir and Seemin Rubab
Trivalent rare-earth-activated luminescent materials have attracted a lot of attention due to their fascinating optical properties and broad range of applications. In this study, polycrystalline Sm and Eu-doped LiMgPO4 luminescent materials were synthesized using a solid-state reaction technique. The crystalline structures, morphological features, and optical characteristics of the synthesized materials
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Prediction of anaerobic digestion performance by quantum convolutional reconstruction gated recurrent neural network* Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Dong Hou, Xuanxuan Che, Feifei Li and Yumin Dong
Methane as a renewable energy source has become a hot topic in recent years. Methane is a bioenergy source produced during the anaerobic digestion of organic waste, and the anaerobic digestion process must be monitored and controlled to produce the required amount of methane in a stable manner. Mathematical modeling is used to simulate digester operation to predict the biogas production from anaerobic
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Traveling wave solution for a nonlocal Belousov-Zhabotinskii reaction-diffusion system Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Meng-Xue Chang, Bang-Sheng Han and Han Yang
We consider a Belousov-Zhabotinskii reaction-diffusion system with nonlocal effects and study the existence of traveling wave solutions. By constructing appropriate super- and sub-solutions and using Schauder's fixed point theorem, we show that there is a critical speed c* > 0 such that when the wave speed c > c*, there exists a traveling wave solution connecting (0, 0) to a positive steady-state,
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Modified Korteweg–de Vries solitons with quartic nonlinearity in a dusty plasma Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Dulal Chandra Das, Samiran Das and Rekha Kalita
The present multicomponent dusty plasma with ions, Cairns distributed electrons and immobile dusts has been investigated first time through modified Korteweg–de Vries (mKdV) equation of quartic nonlinearity derived by reductive perturbation technique. In this new investigation, it is found that the dust ion-acoustic (DIA) solitary waves have smaller amplitudes compared to the amplitudes of mKdV-DIA
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DFT combined to Boltzmann transport theory for optoelectronic and thermoelectric properties investigations for Se (4 & 8 (at.%)) doped Li2SnS3 Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Muhammad Aamer, Sikander Azam, Muhammad Jawad, Sidra Kanwal, M Tahir Khan, Asif Mahmood, Wilayat Khan and Amin Ur Rahman
Cubic Li2SnS3 emerges as a noteworthy ionic conductor and a viable electrode material for lithium secondary batteries. Its application extends to solar cell technologies, owing to its commendable optoelectronic properties and high-power conversion efficiency. In this study, we present density functional theory (DFT)-based first principles calculations for Li2SnS3-xSex (x = 0, 4, and 8% (atomic percent
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Quantum G-coherence factorization law under fully and strictly incoherent operations Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Xinzhi Zhao, Jianwei Shao, Yi Zheng, Wen-Zhao Zhang and Chengjie Zhang
Quantum coherence plays an important role in quantum resource theory, which is strongly related with entanglement. In order to quantify the full coherence of qudit states, we define G-coherence and convex roof of G-coherence, and prove that the G-coherence is a strong coherence monotone and the convex roof of G-coherence is a coherence measure under fully and strictly incoherent operation (FSIO), respectively
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Clarification of Au dimer adsorption sites on Si (111)-7 × 7 surface by AFM/KPFM Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Qiang Guo, Xiaosen Ren, Pengli Shu, Xin Tian, Jiuyan Wei, Zhang Qu, Huanfei Wen, Jun Tang, Yanjun Li, Yasuhiro Sugawara, Zongmin Ma and Jun Liu
Atomic-scale surface adsorption has been a significant research topic in recent years, with a particular emphasis on the adsorption properties of Au/Si(111)-7 × 7, which are vitally important for pioneering future novel semiconductor devices. Here, we investigated the adsorption of Au dimers on the Si(111)-7 × 7 surface with atomic resolution using non-contact atomic force microscopy and Kelvin probe
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Preparation and structure investigation of polyethylene terephthalate polyester reinforced Ni0.5Zn0.5Fe2O4 nanoparticles for gamma ray shielding performance Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Meshari Almeshari, Fawzy Hammad Sallam, Mohamed Tharwat, Yasser Alzamil, Mohammed Salih, Bader Alshoumr, Amjad Alyahyawi and Atef El-Taher
Defects of high atomic materials gamma-ray shielding such as low chemical stability, low mechanical properties, and heaviness lead us to investigate other light and flexible materials such as polymers. Polymer-doped nanosized materials are the most frequently examined materials. In this study, polyethylene terephthalate [(C10H8O4)n] was doped with Ni0.5Zn0.5Fe2O4 nanoparticles up to 40 wt% (0.0, 10
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Fiber design and performance analyses for optical multiplexing: terahertz optical communications Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Md Anowar Kabir, Bikash Kumar Paul, Md Selim Hossain, Muhammad Shahin Uddin and Monir Morshed
Multiplexing is the process of combining multiple signals at a single channel. Orbital Angular Momentum (OAM) is one of the main multiplexing techniques for optical data transmissions. This paper examines and suggests a hollow core with four layers of semilunar air-hole-shaped circular photonic crystal fiber (PCF) capable of transmitting terahertz (THz) OAM information-carrying modes. By using the
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Functionalization of morphology in optimization of dielectric, electrical/impedance modulus, and relaxation mechanisms of Co-Ni doped M-type Sr nanoferrites Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Sayed Tathir Abbas Naqvi, Charanjeet Singh, Sachin Kumar Godara, Rajshree B Jotania, Varinder Kaur and Ashwani Kumar Sood
In this article, novel M-type hexaferrites SrCoxNixFe12−2xO19 were synthesized using the sol–gel method. The phase structure was characterized by x-ray diffraction, grain morphology was investigated from scanned electron micrographs, and dielectric/electric/impedance characteristics were analyzed in the frequency range of 100 Hz to 2 MHz. X-ray diffraction (XRD) revealed the formation of hexaferrites
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Low parasitic carrier reservoir of AlGaN-based DUV-LED via controlled-polarization step-graded superlattice electron blocking layer for high luminescence lighting Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Mohammad Amirul Hairol Aman, Ahmad Fakhrurrazi Ahmad Noorden, Suzairi Daud and Muhammad Zamzuri Abdul Kadir
Achieving high luminescence intensity of deep-ultraviolet light-emitting diode (DUV-LED) is generally performed through the implementation of electron blocking layer (EBL) on the chip’s epilayers. However, the issue of parasitic carrier reservoir that originated from the uncontrolled piezoelectric field polarization has restricted the performance of DUV-LED by reducing the radiative recombination in
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Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Chenyan Huang, Shu Yang, Emon Talukder, Hongming Xiang, Ying Jin and Saihong Cao
Noise pollution is an important problem affecting people’s lives and work quality. In the current noise reduction materials, the porous sound absorption materials usually only haveagood sound absorption effect for medium and high -frequency sound waves, and the sound absorption effect for low -frequency sound waves is relatively weak. However, in recent years, the research on acoustic metamaterials
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ZnO based ultrasensitive CO chemiresistive gas sensor Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Shivani Dhall, Kapil Sood, Jyoti Prakash and B R Mehta
The detection of hazardous gases in the atmosphere is a topic of interest for public security, environmental pollution and industrial emission. In recent years, semiconductor-based gas sensor attracted wide attention in all over the world. Among various hazardous gases, detection of CO at low temperature with fast response and recovery time is still a challenge. In this work, we have adopted single
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Systematic study of α-decays from the ground and isomeric states of the nuclei with 67 ≤ Z ≤ 106 Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 V K Anjali, K P Santhosh and K P Zuhail
The Modified Generalised Liquid Drop Model (MGLDM) is employed to analyze both the favored and unfavored α-decays in the ground states (g.s.) and isomeric states (i.s.) of some nuclei having proton numbers, 67 ≤ Z ≤ 106. The calculated half-lives closely match the experimental results, with a least standard deviation, 0.3598, which shows that the g.s. model ‘MGLDM’ with some improvements can effectively
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Enhance the detection of surface micro/nanostructures by SPPs generated from silver film covered hemi-microsphere Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Wenyue Ren, Zhuozhuo Huang, Yangdong Wen and Wen Jung Li
Surface plasmon polaritons (SPPs) are widely used for surface micro/nanostructures detection. However, because of the limitations of the common SPPs excitation conditions, it is difficult to flexibly detect surface micro/nanostructures in the air without being limited by the substrate structure. In this paper, a new SPPs excitation structure is developed. This structure is a silver film covered hemi-microsphere
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On the heart rhythm analysis using a nonlinear dynamics perspective: analytical study and electronic simulation Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 R F Fonkou, Romanic Kengne, M D Wamba, Herton Carel Fotsing Kamgang and P K Talla
Biological systems are highly complex, so understanding them requires extensive analysis. Cardiac rhythms are one such analysis. These rhythms are linked to a complex dynamic system defined on the basis of the electrical activity of cardiac cells. This electrical activity is essential to human physiology, defining numerous behaviours that include normal or pathological rhythms, generally measured by
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Nonlinearity effects on thermal transport properties of a mass-spring chain Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Taghi Akbari Chaleshtori, Hassan Rabani and Mohammad Mardaani
Using Green’s function technique, we present a self-consistent formalism to study the phonon transport properties of an extended nonlinear mass-spring chain. We calculate the phonon transmission coefficient, thermal conductivity, and specific heat for some chains with different configurations of masses feeling the nonlinearity potential. The numerical results show that in a critical value of the nonlinearity
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Adaptive residual convolutional neural network for compressive strength prediction of energetic materials using SEM images Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Lei Song, Aijun Yin, Shuhui Chen and Zhendong Long
The microstructure of materials has a great influence on the macroscopic mechanical properties of materials, and the relationship between them is of great significance to the design of materials. With the development of artificial intelligence and deep learning, many researchers have used convolutional neural networks (CNN) to correlate microscopic images with material properties, and achieved good
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Vibration control mechanisms of plate structures by 1D acoustic black hole dynamic vibration absorber Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Huabing Wen, Xin Guo, Ran Ma, Junhua Guo, Ziqiang Shi and Linchang Ye
Due to the advantages of simple structure and effective vibration suppressions, acoustic black hole (ABH) structures attract many scholars’s attention. In this paper, by capitalizing phenomenon of acoustic black hole (ABH), an ABH-featured dynamic vibration absorber (1D-ABH-DVA) is proposed for vibration suppressions, and three improved cases are proposed based on the 1D-ABH-DVA. To achieve broadband
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Hybrid quantum neural network structures for image multi-classification Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Mingrui Shi, Haozhen Situ and Cai Zhang
Image classification is a fundamental problem in computer vision, and neural networks provide an effective solution. With the advancement of quantum technology, quantum neural networks have attracted a lot of attention. However, they are only suitable for low-dimensional data and require dimensionality reduction and quantum encoding. Two image classification methods have recently emerged: one employs
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Effect of annealing on the electrical resistivity of Kondo lattice CeRh2Ga2 Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 V K Anand, D T Adroja, A Aarti, A Bhattacharyya and B Lake
CeRh2Ga2, which crystallizes in CaBe2Ge2-type primitive tetragonal structure (space group P4/nmm), is known to exhibit Kondo lattice heavy fermion behavior and is proposed to be a potential candidate for Weyl-Kondo semimetal phase. Here we examine the effect of annealing, particularly on the electrical resistivity of polycrystalline CeRh2Ga2. A comparative study of the powder x-ray diffraction (XRD)
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Theoretical triple differential cross sections for ionization of N 2 and CH 4 molecules by electron impact Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 M Mondal, B Mandal, A Haque, K Purkait and M Purkait
We present the angular distribution of electron emission by calculating the triple differential cross sections for (e, 2e) process on N2 and CH4 by using the three-body formalism of molecular first Born approximation (MFBA), two-Coulomb wave (M2CW), and three-Coulomb wave (M3CW) models, respectively. In these models, a Coulomb distorted wave is considered for the motion of the incident electron. We
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Terahertz generation of Airy beam with polarization conversion in a reflective vanadium dioxide metasurface Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Zhesheng Zhou, Runxuan Zhang, Zijun Chen, Ruixing Nie, Zimo Pan and Zhengyong Song
Airy beam possesses a wide range of applications owing to its special properties of non-diffraction, self-accelerating, and self-healing. However, conventional Airy beam generators are not conducive to their miniaturization or integration. In this paper, a technique for generating Airy beam is introduced with polarization conversion within the frequency range of 0.9–1.2 THz based on a reflective vanadium
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Multiple firing patterns, energy conversion and hardware implementation within Hindmarsh-Rose-improved neuron model Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Shaohui Yan, Jiawei Jiang, Yuyan Zhang, Bian Zheng, Hanbing Zhan and Defeng Jiang
The transmission of information between neurons is accomplished in living organisms through synapses. The memristor is an electronic component that simulates the tunability of the strength of biological synaptic connections in artificial neural networks. This article constructs a novel type of locally active memristor and verifies by nonlinear theoretical analysis, locally active analysis and circuit
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Verifiable blind quantum computation over collective-noise Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Yuan-Mao Luo, Zhen Yang, Guang-Yang Wu, Yu-Zhan Yan and Ming-Qiang Bai
Blind quantum computation(BQC) is a new type of secure quantum computation. In the natural environment, the qubits used in BQC will inevitably be affected by the noise, and the client cannot guarantee the correctness of computational results when the server is dishonest. This paper proposes a verifiable BQC over collective-noise based on quantum error correction to solve these two problems. Furthermore
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Optical properties of the O3+-ion implanted and femtosecond-laser ablated ridge waveguide in the Er3+-doped germanate glass Phys. Scripta (IF 2.9) Pub Date : 2024-04-24 Jie Zhao, Xiao Ni, Yuan-Yang Huo, Wang Sun, Liao-Lin Zhang and Chun-Xiao Liu
Er3+-doped germanate glass is a kind of polyfunctional material for optical and photonic applications. The work reports on the preparation and properties of O3+-ion implanted and femtosecond-laser ablated Er3+-doped germanate glass optical ridge waveguide. The energy is 6.0 MeV and the fluence is 5 × 1014 ions cm−2 for the O3+-ion implantation. The pulse energy and the scanning speed of the femtosecond-laser
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A model for a Langmuir sheath in a stagnating dense plasma with secondary ion formation Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Christopher R Martin, Alexandrina Untaroiu and S M Mahbobur Rahman
This simplified model provides solutions for the current-voltage characteristics of a sheath in a dense flowing plasma when surface chemistry contributes secondary ions. The problem is motivated by the recent discovery that strong transient signals in industrial ion current sensors are caused by chemical reactions with carbon in the steel being cut or welded by oxyfuel processes. The one-dimensional
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Edge-dependent electronic transport and diode effect in C3N nanoribbons Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 G R Berdiyorov
Quantum transport calculations are conducted for C3N nanoribbons with different edge terminations within the nonequilibrium Green’s function formalism in combination with density functional theory. The electronic transport in the system strongly depends on the properties of the edge states. For example, the current in metallic carbon-terminated nanoribbons is several orders of magnitude higher than
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Blaze-angle led dark-blue iridescence and superhydrophobicity features of non-morpho Euploea midamus butterfly wing scale Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Bikash K Das, Mahesh C Dubey and Dambarudhar Mohanta
We report on backlit iridescent blue structural coloration as well as superhydrophobicity in a non-morpho butterfly of Euploea midamus (blue-spotted crow) belonging to the Lepidoptera order. Select forewing and hindwing parts were characterized by employing optical microscopy, field emission electron microscopy, UV–vis-NIR spectrophotometry, and an advanced contact angle meter. As substantiated from
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DFT insights into i-MAB phase, Mo4Y2Al3B6: a potential thermal barrier coating and solar heat reducing material Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 S Islam, M R Rana, Prima Das, K Hoque, S H Naqib and M A Ali
We have investigated the physical properties of the i-MAB: Mo4Y2Al3B6 phase via the density functional theory (DFT) approach. The optical properties, thermal properties, and Vickers hardness of the compound Mo4Y2Al3B6 have been studied theoretically for the first time. The correctness of the fine-tuned structural parameters is confirmed by their close match with experimental results. The compound’s
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Investigation of virtual cathode generated by a tungsten emissive probe in a vacuum Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Jian-Quan Li, Shu-Han Li and Hai-Jie Ma
The virtual cathode characteristics (the potential barrier and the spatial size) generated by a tungsten emissive probe are investigated in a vacuum using the one-dimensional theory of the virtual cathode developed by us. In the calculation principle of the virtual cathode, the effective filament area for electron emission is treated with different models. Using the calculation principle, the potential
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Investigating the existence, uniqueness, and stability of solutions in boundary value problem of fractional differential equations Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 R Poovarasan, J F Gómez-Aguilar and V Govindaraj
This study uses fixed point theory and the Banach contraction principle to prove the existence, uniqueness, and stability of solutions to boundary value problems involving a Ψ-Caputo-type fractional differential equation. The conclusions are supported by illustrative cases, which raise the theoretical framework’s legitimacy. Fractional calculus is widely used in scientific fields, as seen by its applications
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Multiple Fano resonances by MIM waveguide coupling whispering gallery mode resonator and application in Refractive index sensing Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Jiayao Gao, Xiangxian Wang, Yizhen Chen, Tianshan Chen, Yunping Qi, Hua Yang and Xiaoping Zheng
In this study, a baffled metal–insulator–metal (MIM) waveguide coupled with a whispering gallery mode resonator (WGMR) is proposed. This structure could excite quadruple Fano resonances. The asymmetric Fano resonance transmittance spectrum and the electric field at the resonance peak were numerically simulated using the finite difference time domain method. The obtained data were fitted using the multimode
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Estimation of local arterial stiffness using non-invasive flow measurements: a study on a stenosed carotid artery Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Shamsul Haq, Raheem Gul and Nasir Siddiqui
Arterial stiffness is a well-established independent prognostic bio-marker in the human cardiovascular system (CVS). Despite its value as a predictive bio-marker, the inclusion of vascular stiffness into standard clinical procedures or guidelines is limited. This has come about as a result of the abundance of tools created to estimate and evaluate local arterial stiffness in people. This study employs
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Surface engineering by rogue wave induced by energetic carbon clusters Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 A S El-Said, W M Moslem, R E Tolba, R Sabry and H Bahlouli
Swift heavy ions are effective in nanostructuring material surfaces. The irradiation of lanthanum fluoride with 30 MeV C60 leads to the creation of surface nanohillocks of size larger than the ones produced by monoatomic heavy ions. The generation of the observed nano-sized hillocks is described here by a new approach that is based on ion-induced intensive electronic excitations that create localized
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A variational quantum perceptron with Grover’s algorithm for efficient classification Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Nouhaila Innan and Mohamed Bennai
This study introduces the Quantum Variational Perceptron with Grover’s algorithm (QVP-G), an innovative Quantum machine Learning (QML) model significantly enhancing binary classification tasks’ capabilities. The study goes beyond theoretical constructs, employing empirical evaluations of QVP-G on the well-established Iris and more complex breast cancer datasets. This dual-dataset approach highlights
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Active control of Fano resonance in side-coupled resonator-cavity systems Phys. Scripta (IF 2.9) Pub Date : 2024-04-23 Rui Jiang, Lei Gao, Lei Yang, Jun Wang, Qian Wu, Yong Sun and Yongqiang Chen
The study delves into actively controlling Fano resonance within a single-mode microstrip cavity, coupled with a split ring resonator (SRR) incorporating a varactor diode. This resonance arises from the interference between the SRR and a Fabry–Pérot cavity, resulting in a sharply asymmetric transmission spectrum. The varactor diode, situated within the SRR gap, is biased electrically via an external
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Study on current-carrying tribological characteristics of C-Cu sliding electric contacts under water accumulation from rainfall condition Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Guoqiang Gao, Qingsong Wang, Hong Wang, Pengyu Qian, Wei Peng, Yaguang Ma, Deliang Dong, Xiangfei Wang, Shuhang He, Zefeng Yang and Guangning Wu
Pantograph-OCS system sliding electrical contact is the only way for train energy transmission, which determines the safety and stability of energy transfer. And the current-carrying wear is the core factor that affecting the service performance of C-Cu contact pairs. C-Cu mate pairs often work for a long time in rainy/humid environments due to its exposed nature of work, and the contact interface
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Effect of films thickness and hydrogen annealing on passivation performance of plasma ALD based Hafnium oxide films Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Meenakshi Devi, Shweta Tomer, Prathap Pathi and Vandana
We investigate the silicon surface passivation property of Plasma Atomic Layer Deposited (PALD) hafnium oxide thin films and study its dependence on silicon (Si) doping type, film thickness, and post-deposition annealing conditions. Our results demonstrate that as-deposited HfOx films exhibit poor passivation quality that can be improved by performing post-deposition annealing at 450 °C in hydrogen
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Numerical simulation on high quality anapole resonator with large electric field concentration in all-dielectric metasurface Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Xiangpeng Liu, Junqiao Wang, Jing Xiong, Qiaoqiao Wang, Hao Zhang and Jingyi Sun
In the field of nanophotonics, the manipulation of light using high refractive index dielectric materials has garnered significant attention in recent years. This occurs because dielectric materials with a high refractive index demonstrate lower losses in comparison to metallic plasmonic materials. Furthermore, the interference between internal toroidal dipole moment and electric dipole moment leads
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Simulation and analysis of inverse-mode operation of single event transient mechanisms on NPN-SiGe HBT Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Mathew Adefusika Adekoya, Shuhuan Liu, Xuan Wang, Tian Xing, Haodi Li, Fanjun Meng, Xiaozhi Du, Zhuoqi Li and Taiyi Huang
This work presents the characteristics of the single event transient (SET) induced by a single heavy ion in the inverse mode NPN-SiGe HBT simulated with the Silvaco TCAD toolkit. The designed SiGe HBT technology structure was built on the DevEdit simulator and simulated on Deckbuild using device and radiation effect simulations. The characteristics of device SET distribution, including transient pulse
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Effect of vertical electric field components on the local arc development along contaminated surfaces Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Lu Wen, Bin Cao and Liming Wang
During operation, a vertical-component electric field emerges on the surface of high-voltage AC bushings. This unique electric field structure renders the bushing more susceptible to discharge and flashover. However, limited attention has been paid to studying the flashover characteristics resulting from surface pollution in such electric fields. This investigation, involving four differently structured
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FEA and CFD analysis and optimization of tube in tube heat exchanger for various cases Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Abhijeet Shah, Ankit Wasnik and Ajinkya Patil
This research describes the use of advanced simulation techniques to investigate use of different materials for a tube-in-tube heat exchanger. Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD) simulations are employed to simulate thermal aspects and optimize the heat exchanger design. The objective is to identify the best-Suitable material combination considering both design and
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Path integral formulation for Dunkl-Dirac oscillator in (1+1)-dimensional space-time coordinates Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 H Benzair, T Boudjedaa and M Merad
In this paper, we extend the path integral formalism for the Dirac oscillator in (1+1) dimension by replacing the spatial derivative with the Dunkl derivative. Utilizing representations in position space-time coordinates, we precisely calculate the propagator, expressed in terms of generalized Hermite polynomials. The energy eigenvalues of the electron, along with their corresponding wave functions
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μ2mech: A software package combining microstructure modeling and mechanical property prediction Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Albert Linda, Ankit Singh Negi, Vishal Panwar, Rupesh Chafle, Somnath Bhowmick, Kaushik Das and Rajdip Mukherjee
We have developed a graphical user interface (GUI) based package μ2mech to perform phase-field simulation for predicting microstructure evolution. The package can take inputs from ab initio calculations and CALPHAD (Calculation of Phase Diagrams) tools for quantitative microstructure prediction. The package also provides a seamless connection to transfer output from the mesoscale phase field method
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Quench dynamics in the Jaynes-Cummings-Hubbard and Dicke models Phys. Scripta (IF 2.9) Pub Date : 2024-04-22 Andrew R Hogan and Andy M Martin
Both the Jaynes-Cummings-Hubbard (JCH) and Dicke models can be thought of as idealised models of a quantum battery. In this paper we numerically investigate the charging properties of both of these models. The two models differ in how the two-level systems are contained in cavities. In the Dicke model, the N two-level systems are contained in a single cavity, while in the JCH model the two-level systems