Physics Open最新文献_第10页

Enhanced thermo-magnetic and mechanical performance of EPDM composites reinforced with Fe2O3:NiO nanoparticles under magnetic field-assisted vulcanization Fe2O3:NiO纳米颗粒增强EPDM复合材料在磁场辅助硫化下的热磁和力学性能

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-09-04 DOI: 10.1016/j.physo.2025.100319

Mohammed Muhi Ali , Salih Abbas Habeeb , Mohammed Hamza Al-Maamori

{"title":"Enhanced thermo-magnetic and mechanical performance of EPDM composites reinforced with Fe2O3:NiO nanoparticles under magnetic field-assisted vulcanization","authors":"Mohammed Muhi Ali , Salih Abbas Habeeb , Mohammed Hamza Al-Maamori","doi":"10.1016/j.physo.2025.100319","DOIUrl":"10.1016/j.physo.2025.100319","url":null,"abstract":"<div><div>This study investigates the effect of hybrid ferromagnetic (Fe<sub>2</sub>O<sub>3</sub>) and antiferromagnetic (NiO) nanoparticles on the structural, thermal, magnetic and mechanical properties of ethylene propylene diene monomer (EPDM) rubber composites. Composites with varying Fe<sub>2</sub>O<sub>3</sub>:NiO weight ratios (1:0.25, 1:1.1, 1:1.5) were synthesized and characterized using techniques such as FTIR, XRD, SEM, AFM, DSC-TGA and VSM. The results revealed that the addition of NiO nanoparticles improved the curing rate, crosslink density, tensile strength and thermal conductivity, with optimal performance observed at 1:1.1 wt% Fe<sub>2</sub>O<sub>3</sub>:NiO. Magnetic field-assisted vulcanization promoted nanoparticle alignment, leading to enhanced anisotropy and dispersion, which significantly improved the magneto-mechanical performance of the composites. FTIR and XRD confirmed physical interaction without chemical bonding between the fillers and the rubber matrix. The composite containing 1:1.5 wt% Fe<sub>2</sub>O<sub>3</sub>:NiO demonstrated the highest magnetic response, indicating potential use in magnetorheological elastomer applications.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100319"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adaptive extraction of rotating Doppler shift based on random forest regression 基于随机森林回归的旋转多普勒频移自适应提取

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-11-07 DOI: 10.1016/j.physo.2025.100347

Song Qiu, Qiang Wang, Minghui Xiong, Jin Zheng, Xiaoting Wang

引用次数: 0

Biointeractions of Mn-doped citrate-coated magnetite nanoparticles with HeLa cells: A cytotoxic evaluation 锰掺杂柠檬酸盐包被的磁铁矿纳米颗粒与HeLa细胞的生物相互作用：细胞毒性评价

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-11-05 DOI: 10.1016/j.physo.2025.100344

Ashna Poulose , P. Amruth , K.A. Nafih , Goutam Kumar Chandra , P.N. Prashanth Kumar , K.S. Pramod

{"title":"Biointeractions of Mn-doped citrate-coated magnetite nanoparticles with HeLa cells: A cytotoxic evaluation","authors":"Ashna Poulose , P. Amruth , K.A. Nafih , Goutam Kumar Chandra , P.N. Prashanth Kumar , K.S. Pramod","doi":"10.1016/j.physo.2025.100344","DOIUrl":"10.1016/j.physo.2025.100344","url":null,"abstract":"<div><div>Magnetic nanoparticles (NPs) form a category of NPs that can be easily manipulated with a magnetic field. In the present study, superparamagnetic magnetite (Fe<sub>3</sub>O<sub>4</sub>) NPs (MNPs) doped with manganese (Mn<sup>2+)</sup> and coated with citric acid (CA) were synthesised via a cost-effective and simple co-precipitation method. The obtained nano powder was investigated using X-ray powder diffraction (XRD) spectroscopy, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), UV–visible (UV–Vis) spectroscopy, and vibrating sample magnetometer (VSM). These analyses validate the successful integration of Mn<sup>2+</sup> ions into the magnetite structure, with only a minor effect on the lattice parameter value. Spectroscopic investigations revealed the composition of MNPs and the coating with citrate ions. Magnetic measurements confirmed that the synthesised MNPs exhibit superparamagnetic characteristics, displaying minimal remanence and coercivity. The cytotoxic effects were evaluated on HeLa cells using the MTT assay at concentrations ranging from 50 to 300 μg/mL. The results revealed a dose-dependent cytotoxicity for all MNPs combinations. Additionally, findings indicate that surface functionalization and ion doping significantly affect the biocompatibility of MNPs and enhance their potential for biomedical applications.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100344"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Monte Carlo approach to optimising a primary collimator design using EGSnrc 利用EGSnrc优化主准直器设计的蒙特卡罗方法

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-10-29 DOI: 10.1016/j.physo.2025.100339

Anthony Criscuolo , Tracy Underwood , Rebecca Nutbrown , David Shipley , Russell Thomas , Patrick H. Regan , Michael W. Kissick

{"title":"A Monte Carlo approach to optimising a primary collimator design using EGSnrc","authors":"Anthony Criscuolo , Tracy Underwood , Rebecca Nutbrown , David Shipley , Russell Thomas , Patrick H. Regan , Michael W. Kissick","doi":"10.1016/j.physo.2025.100339","DOIUrl":"10.1016/j.physo.2025.100339","url":null,"abstract":"<div><div>The primary collimator in a clinical linear accelerator (linac) plays a vital role in the radiation shielding of the machine. One objective of the collimation system is to reduce head leakage to less than 0.1 % relative to the dose on the central axis of the main beam. The objective of this study is to investigate the variation in different parameters of a primary collimator to identify a more optimal design through Monte Carlo simulations. Using the Monte-Carlo EGSnrc cavity application, water scoring regions up to 90°, away from the beam axis, were set up to investigate the properties of various tungsten primary collimator sizes and shapes with 6 MeV electrons incident to a target. For a fixed 12 cm length primary collimator, increasing the external radius from 6 cm to 12 cm, decreased side leakage measured at 90° by a factor of 10. Also, increasing the field size opening, increased leakage by a minimum of a factor of 5 at all angles. Extending the fixed 8 cm external radius primary collimator, from 8 cm to 14 cm length, made little difference to the leakage dose, for example, scoring at 45°. This reduction was a factor of 1.5. A conical frustum shape was found to be an optimal shape in terms of the level of shielding provided per unit volume of material compared to a cylinder.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100339"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First-principles study of the electrical, optical, elastic, and mechanical properties of actinium gallium oxide AcGaO3 under varying stress conditions 不同应力条件下氧化锕镓ac高3的电学、光学、弹性和力学性质的第一性原理研究

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-09-03 DOI: 10.1016/j.physo.2025.100318

S.M. Junaid Zaidi , M. Ijaz Khan , Sana Ullah Sahar , Hammad Khalid , Laviza Fatima , Khaled Fahmi Fawy , M. Umer Farooq , Naeem Ullah

{"title":"First-principles study of the electrical, optical, elastic, and mechanical properties of actinium gallium oxide AcGaO3 under varying stress conditions","authors":"S.M. Junaid Zaidi , M. Ijaz Khan , Sana Ullah Sahar , Hammad Khalid , Laviza Fatima , Khaled Fahmi Fawy , M. Umer Farooq , Naeem Ullah","doi":"10.1016/j.physo.2025.100318","DOIUrl":"10.1016/j.physo.2025.100318","url":null,"abstract":"<div><div>This work is presented to evaluate the fundamental material features of cubic actinium gallium oxide (AcGaO<sub>3</sub>) by applying stress at 0, 25, 50, and 100 GPa. The compound is subjected to the computationally generalized gradient approximations (GGA) with Perdew Burke Ernzerhof (PBE) exchange. When stress is applied, the bandgap decreases from 3.023 to 1.647 eV. The partial densities of states (PDOS) for oxygen (O), gallium (Ga), and actinium (Ac) are calculated. The oxygen p-states are responsible for the dominant peaks for AcGaO<sub>3</sub> at 0, 25, 50, and 100 GPa in the valence band range. The dielectric function <em>ε</em>(ω), loss function L(ω), reflectivity R(ω), absorption I(ω), optical conductivity σ(ω), and refractive index n(ω) are some of the significant changes in optical characteristics that are observed with varying stress range from 0 to 100 GPa. When stress is applied between 0 and 100 GPa, the lattice constant values (3.6554 Å to 3.3464 Å) are predicted computationally using energy deformation equations. Several different mechanical features appear to change when stress increases, including the bulk modulus (181.3335–581.8504), shear modulus (140.3777–311.5196), and Young's modulus (334.7514–793.0307). Pugh, Poisson, and Frantsevich mechanical ratios showed that overall brittle behavior occurs between 20 and 100 GPa. Our estimated findings about (AcGaO<sub>3</sub>) show the anisotropic character. Furthermore, our anticipated results showed that the chosen material is suitable for use as scintillation material, sophisticated UV and X-ray detectors, space-grade sensors, spintronics, and generation photonics because of its high refractive index, absorption, reflectivity, and conductivity.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100318"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANISSA: Advanced Neutron Imaging for Solid-State batteries in Action 用于固态电池的先进中子成像技术

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-10-17 DOI: 10.1016/j.physo.2025.100336

Oriol Sans-Planell , Nikolay Kardjilov , Ingo Manke , Gitanjali Gitanjali , Martin Lange , Eva Schlautmann , Alessandro Tengattini , Stephen Hall , Philip Vestin , Qaphelani Ngulube , Robin Woracek , Wolfgang G. Zeier , Kristina Edström

引用次数: 0

Quantum characteristics of a nondegenerate three-level laser with NDPA pumped by electron bombardment 电子轰击泵浦NDPA非简并三能级激光器的量子特性

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-10-23 DOI: 10.1016/j.physo.2025.100337

Aliyyi Adem

{"title":"Quantum characteristics of a nondegenerate three-level laser with NDPA pumped by electron bombardment","authors":"Aliyyi Adem","doi":"10.1016/j.physo.2025.100337","DOIUrl":"10.1016/j.physo.2025.100337","url":null,"abstract":"<div><div>This study investigates the entanglement and squeezing characteristics of light generated by a non-degenerate, three-level laser with a non-degenerate parametric amplifier, which is pumped by electron bombardment to the top level and coupled to a two-mode vacuum reservoir through a single-port mirror. By normal ordering the noise operators, we simplified the calculations and derived the evolution equations for the atomic operators using the master equation. From the steady-state solutions, we determined the average of the photon number, the quadrature variance of radiation, entanglement, the normalized second-order correlation of the cavity radiation, and fluctuations in intensity difference. Our findings indicate that higher spontaneous emission rates significantly decrease the average photon number, while the amplitude of the pumping mode interacting with the parametric amplifier (<span><math><mi>ɛ</mi></math></span>) increases it. Enhanced squeezing is observed with increasing (<span><math><mi>ɛ</mi></math></span>), reaching a peak at <span><math><mrow><mi>ɛ</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>02</mn><mspace></mspace><mrow><mo>(</mo><mn>78</mn><mo>.</mo><mn>5</mn><mtext>%</mtext><mo>)</mo></mrow></mrow></math></span>. Moreover, spontaneous emission enhances squeezing for some interval of <span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>. A direct correlation between quadrature squeezing and entanglement is found, with greater quadrature squeezing associated with increased entanglement. This research offers potential advancements in quantum technologies, such as quantum communication, computing, and sensing, where controlled squeezing and entanglement are crucial for improving performance.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100337"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced leak detection in water distribution systems using GFCC-based signal processing techniques 利用基于gfcc的信号处理技术增强配水系统的泄漏检测

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-09-10 DOI: 10.1016/j.physo.2025.100324

Mohd Fairusham Ghazali , Nor Azinee Said , Muhammad Aminuddin Pi Remli , Erdiwansyah , Muhammad Hanafi Yusop , Rizalman Mamat

{"title":"Enhanced leak detection in water distribution systems using GFCC-based signal processing techniques","authors":"Mohd Fairusham Ghazali , Nor Azinee Said , Muhammad Aminuddin Pi Remli , Erdiwansyah , Muhammad Hanafi Yusop , Rizalman Mamat","doi":"10.1016/j.physo.2025.100324","DOIUrl":"10.1016/j.physo.2025.100324","url":null,"abstract":"<div><div>Leak detection in water distribution systems remains a significant challenge, especially for small-scale leaks masked by noise. This study proposes an advanced signal processing approach using Gammatone Frequency Cepstral Coefficients (GFCC) combined with a squeezing technique to enhance the detection of weak leak signals. Experiments were conducted using a 152-m MDPE pipeline under two water pressure levels (1 bar and 2 bar) and five leak sizes (1 mm–5 mm). The proposed method detected leak signals at low signal-to-noise ratio (SNR) levels as low as 95 dB, where conventional methods typically fail to do so. Specifically, the squeezing technique effectively amplified transient leak signals, enabling accurate identification of leak-induced spikes within high-noise environments. The analysis revealed a significant improvement in detection, with leak signals becoming distinguishable even under severe masking conditions. The proposed GFCC-based technique achieved consistent detection across 30 repeated datasets, validating its robustness and repeatability. The novelty of this study lies in integrating GFCC and squeezing, which were initially used in speech signal processing, into transient-based leak detection in pipelines, an area that has not been widely explored. This hybrid technique presents a promising solution for reliable and high-sensitivity leak detection in modern water distribution networks.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100324"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing traffic capacity of scale free networks by changing queuing strategy 通过改变排队策略提高无标度网络的通行能力

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-09-12 DOI: 10.1016/j.physo.2025.100322

Lingkang Kong, Jian Liu, Xinjian Chu

{"title":"Enhancing traffic capacity of scale free networks by changing queuing strategy","authors":"Lingkang Kong, Jian Liu, Xinjian Chu","doi":"10.1016/j.physo.2025.100322","DOIUrl":"10.1016/j.physo.2025.100322","url":null,"abstract":"<div><div>In this paper, we propose a new queuing strategy, which called multi-channel strategy, to improve traffic capacity. The multi-channel strategy is proposed according to the degree of the node. Compared with the previous strategy, single-channel strategy, in which each node has only one waiting queue so that packets can only transmit according to the order of packet queuing per unit time, the multi-channel strategy adjusts the number of waiting queue that each node has, that is, the number of waiting queue of each node is set according to the maximum amount of packets, the degree, that each node can handle per unit time. The pros and cons of the strategies can be compared by two indicators, one is traffic capacity improving, other one is traffic load. Lots of experimental simulations are conducted. In terms of improve traffic capacity, the multi-channel strategy is about 170% times that of the single-channel strategy. In terms of traffic load, the multi-channel strategy is more evenly distributed than the single-channel strategy. According to the experimental results, the multi-channel strategy is superior to the single-channel strategy.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100322"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adjustable acoustic labyrinthine metamaterials for multiband noise absorption 用于多波段噪声吸收的可调声学迷宫超材料

IF 1.4

Physics Open Pub Date : 2025-12-01 Epub Date: 2025-10-30 DOI: 10.1016/j.physo.2025.100342

Abas Dalvand, Reza Hedayati, Ali Asghar Jafari

{"title":"Adjustable acoustic labyrinthine metamaterials for multiband noise absorption","authors":"Abas Dalvand, Reza Hedayati, Ali Asghar Jafari","doi":"10.1016/j.physo.2025.100342","DOIUrl":"10.1016/j.physo.2025.100342","url":null,"abstract":"<div><div>Acoustic metamaterials offer promising solutions for mitigating noise pollution, but addressing noise sources that vary in frequqncy remains challenging. This study introduces an Adjustable Acoustic Labyrinthine Metamaterial (AALM), with a fixed thickness of 60 mm, designed for tunable, multiband sound absorption within the critical 100–2000 Hz frequency range. The AALM's acoustic properties are tuned via two mechanisms. The primary control involves changing the number of coiled-up spaces; as the number of channels is increased, the effective sound path lengthens, causing a significant decrease in the peak absorption frequency while also increasing the absorption coefficient. Second, fine-tuning and impedance matching are achieved by adjusting the cross-sectional area of the wave entrance: decreasing the opening size slightly reduces the absorption frequency but increases the peak absorption coefficient. Numerical simulations (FEM) and experimental impedance tube measurements validate the design. The AALM, configurable into 24 distinct modes, achieves near-perfect sound absorption (α ~ 1) at targeted frequencies across a wide spectrum from 220 Hz to 1750 Hz. Altering the coiled spaces enables major frequency adjustments (≈120–530 Hz shifts), while modifying the entrance area allows for finer tuning (≈10–50 Hz shifts). This adaptable design surpasses the limitations of conventional passive absorbers and shows significant potential for integration into smart systems capable of real-time noise adaptation.</div></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"25 ","pages":"Article 100342"},"PeriodicalIF":1.4,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145465728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0