The European Physical Journal Plus最新文献_第2页

Quantum-limited estimation of the frequency shift between two interfering photons by time sampling of their quantum beats 通过对两个干涉光子的量子拍的时间采样来估计它们之间的频移

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-07 DOI: 10.1140/epjp/s13360-025-06903-y

Luca Maggio, Danilo Triggiani, Paolo Facchi, Vincenzo Tamma

引用次数: 0

Gamma shielding evaluation of concrete reinforced with locally mined barite rock ores: a comparative analysis of density and attenuation coefficients 用本地开采的重晶石矿石加固混凝土的伽马屏蔽评价：密度和衰减系数的比较分析

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-07 DOI: 10.1140/epjp/s13360-025-06899-5

Mohammad Marashdeh, U. Rilwan

引用次数: 0

Impact of superpredation in a spatiotemporal predator–prey system: a model-based analysis 时空捕食者-猎物系统中超捕食的影响：基于模型的分析

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-07 DOI: 10.1140/epjp/s13360-025-06897-7

Shymashree Jana, Soovoojeet Jana, Suvankar Majee, T. K. Kar

{"title":"Impact of superpredation in a spatiotemporal predator–prey system: a model-based analysis","authors":"Shymashree Jana, Soovoojeet Jana, Suvankar Majee, T. K. Kar","doi":"10.1140/epjp/s13360-025-06897-7","DOIUrl":"10.1140/epjp/s13360-025-06897-7","url":null,"abstract":"<div><p>In this study, we conduct a comprehensive analysis of a predator–prey system governed by a Holling type II functional response, wherein the presence of a superpredator modulates the growth dynamics of the predator. The primary objective of this research is to investigate the impact of the superpredator’s presence on the overall system dynamics. The equilibrium points and their stability properties are thoroughly examined for the nonspatial system, alongside a detailed investigation of Hopf bifurcation phenomena near the steady states. By incorporating self-diffusion and cross-diffusion terms, the modified spatiotemporal model is rigorously examined through analytical techniques and numerical simulations under periodic boundary conditions on a square domain. The study further investigates the conditions for diffusion-driven instability alongside a detailed exploration of Hopf and Turing bifurcation regions within a two-parameter space. A series of numerical simulations is presented for biologically meaningful parameter values, illustrating the emergence of diverse spatial patterns, including spots, stripes, stripe–spot mixtures, and labyrinthine structures within the Turing space. These results highlight the pivotal role of the superpredator’s maximum consumption rate in governing the system’s spatial dynamics and determining the eventual ecological configuration. It is further observed that the predator’s natural mortality rate and the carrying capacity coefficient of the prey significantly influence the pattern dynamics in the presence of a superpredator.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256416","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}

引用次数: 0

In situ synthesized low-doped polyaniline/WS2 nanocomposites for charge storage applications: structural, morphological, electrical, and dielectric modulus analysis 原位合成低掺杂聚苯胺/WS2纳米复合材料的电荷存储应用：结构、形态、电学和介电模量分析

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-06 DOI: 10.1140/epjp/s13360-025-06832-w

Muhammad Riaz, Muhammad Waqas Mukhtar, Syed Mansoor Ali, Rajeh Alotaibi, Syed Danish Ali, Muhammad Asif Shakoori

{"title":"In situ synthesized low-doped polyaniline/WS2 nanocomposites for charge storage applications: structural, morphological, electrical, and dielectric modulus analysis","authors":"Muhammad Riaz, Muhammad Waqas Mukhtar, Syed Mansoor Ali, Rajeh Alotaibi, Syed Danish Ali, Muhammad Asif Shakoori","doi":"10.1140/epjp/s13360-025-06832-w","DOIUrl":"10.1140/epjp/s13360-025-06832-w","url":null,"abstract":"<div><p>Polyaniline (PANI) was synthesized via in situ polymerization route, and nanocomposites were prepared by incorporating tungsten sulfides (WS<sub>2</sub>) nanoparticles at varying concentrations (1 wt%, 2 wt%, and 5 wt%), to enhance their charge storage capabilities. Structural and morphological characteristics were investigated using XRD, FE-SEM, FTIR, TGA, BET, I–V measurements, and dielectric analysis. XRD confirmed the polycrystalline nature of all the nanocomposites, while FE-SEM supported by BET, revealed porous and interconnected morphological texture, beneficial for an effective charge transport mechanism. FTIR spectra showed prominent C = C and C = N stretching vibrations associated with the benzenoid and quinoid rings, indicating strong interfacial interactions between PANI and WS<sub>2</sub> nanoparticles. TGA results demonstrated enhanced thermal stability in all nanocomposites compared to pure PANI. Dielectric measurements (20 Hz–1 MHz) revealed significant enhancement in permittivity for all nanocomposites, followed by frequency-dependent decline consistent well with Maxwell–Wagner interfacial polarization. I–V characteristics further confirmed the ohmic behavior of the samples. Overall, the enhanced dielectric response and superior thermal stability highlight the suitability of PANI/WS<sub>2</sub> nanocomposites for high-performance charge storage and related electronic applications.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256199","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}

引用次数: 0

Novel approaches for determining 30 MeV proton beam energy and dosimetric parameters using stopping power 利用停止功率确定30 MeV质子束能量和剂量学参数的新方法

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-06 DOI: 10.1140/epjp/s13360-025-06888-8

Zeynep Yüksel, M. Çağatay Tufan, Tuğba Mutuk, Mevlüt Gürbüz, Bayram Bilmez, M. Bilge Demirköz

引用次数: 0

Cumulants and central moments of net-charge, net-baryon and net-strangeness distributions in (^{197})Au (+) (^{197})Au collisions at (E_{textrm{lab}}) (=10A), 20A, 30A and 40A GeV using the UrQMD model 利用UrQMD模型计算(E_{textrm{lab}})(=10A)、20A、30A和40A GeV下(^{197}) Au (+)(^{197}) Au碰撞的净电荷、净重子和净奇异度分布的累积量和中心矩

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-06 DOI: 10.1140/epjp/s13360-025-06872-2

Somnath Ghosh, Needia Sharma, Alivia Sarker, Amitabha Mukhopadhyay, Provash Mali

{"title":"Cumulants and central moments of net-charge, net-baryon and net-strangeness distributions in (^{197})Au (+) (^{197})Au collisions at (E_{textrm{lab}}) (=10A), 20A, 30A and 40A GeV using the UrQMD model","authors":"Somnath Ghosh, Needia Sharma, Alivia Sarker, Amitabha Mukhopadhyay, Provash Mali","doi":"10.1140/epjp/s13360-025-06872-2","DOIUrl":"10.1140/epjp/s13360-025-06872-2","url":null,"abstract":"<div><p>We study the first four cumulants and central moments of the distributions of net-charge, net-baryon number and net-strangeness by using <span>(^{197})</span>Au+<span>(^{197})</span>Au collision events generated by the ultra-relativistic quantum molecular dynamics (UrQMD) model at incident beam energies <span>(E_{textrm{lab}})</span> <span>(=10A)</span>, 20<i>A</i>, 30<i>A</i> and 40<i>A</i> GeV in the fixed target configuration. We study the dependence on the collision centrality of these cumulants and moments, and dependence on the pseudorapidity interval size of the central moments in different transverse momentum acceptances. Simulation results are compared with the Skellam distribution (SD) and negative binomial distribution (NBD). In most of the cases, the central moments are found to scale with the number of participating nucleons following the prediction of the central limit theorem. The effects of high baryon density and global conservation principle are quite visible in our results. Not many experimental results on the cumulants and central moments of distributions of conserved quantities are available in the energy domain considered in our analysis. This simulation study will therefore act as a reference baseline prediction for heavy-ion collision experiments at the FAIR and NICA energies.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256198","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}

引用次数: 0

Two-dimensional pentamode materials with a square lattice for underwater cloaking 具有方形晶格的水下隐身二维五模材料

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-05 DOI: 10.1140/epjp/s13360-025-06883-z

Fatemeh Ahmadzadeh, Ali Bahrami, Mansour Zaremanesh

{"title":"Two-dimensional pentamode materials with a square lattice for underwater cloaking","authors":"Fatemeh Ahmadzadeh, Ali Bahrami, Mansour Zaremanesh","doi":"10.1140/epjp/s13360-025-06883-z","DOIUrl":"10.1140/epjp/s13360-025-06883-z","url":null,"abstract":"<div><p>An innovative numerical study on underwater acoustic cloaking is presented, employing two-dimensional pentamode materials arranged in a square lattice configuration. The pentamode structure, composed of aluminum and submerged in water within an air background, achieves effective broadband cloaking with a lattice constant of 10 mm. The total scattering cross section is reduced to approximately 0.25 over the frequency range of 1 – 18 kHz. In addition, far field pressure distributions are analyzed, showing a reduction in scattered pressure amplitude from 0.1 Pa for the aluminum block to 0.05 Pa for the acoustic cloak, confirming significant scattering suppression and minimal disturbance to the surrounding acoustic field. The robustness of the cloak under realistic environmental factors, including hydrostatic pressure and water temperature variations, has also been investigated, demonstrating the design’s practical applicability. While prior studies have predominantly utilized hexagonal or circular lattice geometries, this work explores the relatively less-studied square lattice arrangement, indicating its promising potential for underwater acoustic cloaking applications. These results underscore the versatility of square-lattice pentamode microstructures for practical and reliable underwater stealth technologies.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256575","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}

引用次数: 0

DFT investigation of magnetocrystalline anisotropy in Fe, Co, (hbox {Pd}_{0.97}hbox {Co}_{0.03}) and (hbox {Pd}_{0.97}hbox {Fe}_{0.03}) systems: from bulk to thin-films Fe, Co, (hbox {Pd}_{0.97}hbox {Co}_{0.03})和(hbox {Pd}_{0.97}hbox {Fe}_{0.03})体系磁晶各向异性的DFT研究：从体到薄膜

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-03 DOI: 10.1140/epjp/s13360-025-06884-y

Irina I. Piyanzina, Regina M. Burganova, Hayk Zakaryan, Zarina I. Minnegulova, Igor V. Yanilkin, Amir I. Gumarov

{"title":"DFT investigation of magnetocrystalline anisotropy in Fe, Co, (hbox {Pd}_{0.97}hbox {Co}_{0.03}) and (hbox {Pd}_{0.97}hbox {Fe}_{0.03}) systems: from bulk to thin-films","authors":"Irina I. Piyanzina, Regina M. Burganova, Hayk Zakaryan, Zarina I. Minnegulova, Igor V. Yanilkin, Amir I. Gumarov","doi":"10.1140/epjp/s13360-025-06884-y","DOIUrl":"10.1140/epjp/s13360-025-06884-y","url":null,"abstract":"<p>The nature of low-impurity ferromagnetism remains a challenging problem in the solid-state community because of the strong dependence of magnetic properties on composition, concentration, and structural geometry of diluted alloys. To shed light on this complexity, we conducted a comprehensive density functional theory investigation of magnetocrystalline anisotropy in Fe, Co, <span>(hbox {Pd}_{0.97}hbox {Co}_{0.03})</span> systems across bulk, monolayer, and thin-film geometries. By employing advanced noncollinear spin–orbit coupling calculations, we accurately evaluated the magnetocrystalline anisotropy energies, complemented by detailed atomic-, spin-, and orbital-resolved density of states analyses. Our findings reveal that Fe and Co exhibit contrasting easy-axis orientations that strongly depend on the system geometry. Remarkably, even a low Co doping level of 3 at.% in Pd is sufficient to drive anisotropy trends closely mirroring those of pure Co. In contrast, Pd–Fe systems at the same concentration do not reproduce the anisotropy of pure Fe, showing isotropic behavior in bulk. These insights offer valuable perspectives on tuning magnetic anisotropy through minimal doping in diluted alloys.</p>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 10","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210430","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}

引用次数: 0

Calculation of entanglement entropy of transverse-field ising model from neural network quantum state based on a restricted Boltzmann machine 基于受限玻尔兹曼机的神经网络量子态横场化模型的纠缠熵计算

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-03 DOI: 10.1140/epjp/s13360-025-06855-3

Zhekai Yin, Zixuan Li, Fei Fang Chung, Kok Wee Song, C. K. Ong

引用次数: 0

A hybrid SEM–MIP–and computer vision model for a non-destructive pore size evaluation in nanoporous alumina 纳米多孔氧化铝非破坏性孔径评价的sem - mip和计算机视觉混合模型

IF 2.9 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-10-02 DOI: 10.1140/epjp/s13360-025-06886-w

Ahmed Al-Saudi, Abdulaziz Aljalal

引用次数: 0