The European Physical Journal Plus最新文献

Deep learning-based superconductivity prediction and experimental tests 基于深度学习的超导预测与实验测试

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-22 DOI: 10.1140/epjp/s13360-024-05947-w

Daniel Kaplan, Adam Zheng, Joanna Blawat, Rongying Jin, Robert J. Cava, Viktor Oudovenko, Gabriel Kotliar, Anirvan M. Sengupta, Weiwei Xie

{"title":"Deep learning-based superconductivity prediction and experimental tests","authors":"Daniel Kaplan, Adam Zheng, Joanna Blawat, Rongying Jin, Robert J. Cava, Viktor Oudovenko, Gabriel Kotliar, Anirvan M. Sengupta, Weiwei Xie","doi":"10.1140/epjp/s13360-024-05947-w","DOIUrl":"10.1140/epjp/s13360-024-05947-w","url":null,"abstract":"<div><p>The discovery of novel superconducting materials is a long-standing challenge in materials science, with a wealth of potential for applications in energy, transportation and computing. Recent advances in artificial intelligence (AI) have enabled expediting the search for new materials by efficiently utilizing vast materials databases. In this study, we developed an approach based on deep learning (DL) to predict new superconducting materials. We have synthesized a compound derived from our DL network and confirmed its superconducting properties in agreement with our prediction. Our approach is also compared to previous work based on random forests (RFs). In particular, RFs require knowledge of the chemical properties of the compound, while our neural net inputs depend solely on the chemical composition. With the help of hints from our network, we discover a new ternary compound Mo<sub>20</sub>Re<sub>6</sub>Si<sub>4</sub>, which becomes superconducting below 5.4 K. We further discuss the existing limitations and challenges associated with using AI to predict and, along with potential future research directions.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-024-05947-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micro-computed tomography and laser micro-ablation on altered pyrite in lapis lazuli to enhance provenance investigation: a new methodology and its application to archaeological cases 微计算机断层扫描和激光微烧蚀对青金石蚀变黄铁矿的研究：一种新的方法及其在考古案例中的应用

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-22 DOI: 10.1140/epjp/s13360-025-05988-9

Marta Magalini, Laura Guidorzi, Alessandro Re, Francesca Tansella, Federico Picollo, Sofia Sturari, Pietro Aprà, Georgina Herrmann, Randall Law, Quentin Lemasson, Laurent Pichon, Brice Moignard, Claire Pacheco, Alessandro Lo Giudice

{"title":"Micro-computed tomography and laser micro-ablation on altered pyrite in lapis lazuli to enhance provenance investigation: a new methodology and its application to archaeological cases","authors":"Marta Magalini, Laura Guidorzi, Alessandro Re, Francesca Tansella, Federico Picollo, Sofia Sturari, Pietro Aprà, Georgina Herrmann, Randall Law, Quentin Lemasson, Laurent Pichon, Brice Moignard, Claire Pacheco, Alessandro Lo Giudice","doi":"10.1140/epjp/s13360-025-05988-9","DOIUrl":"10.1140/epjp/s13360-025-05988-9","url":null,"abstract":"<div><p>This work presents an upgrade to the methodology adopted to investigate the provenance of the raw lapis lazuli material used in antiquity for carving precious artefacts. Samples from archaeological excavation contexts frequently display superficial degradation processes affecting the crystals of the mineral phases useful for provenance attribution (especially pyrite). To address this issue, an innovative workflow has been developed, centred on the application of X-ray micro-computed tomography (μ-CT) and micro-ablation treatments with a pulsed laser source prior to investigation with ion beam analysis (IBA). High-resolution μ-CT is employed to evaluate the alteration state of pyrite crystals within the entire volume of the lapis lazuli rock, and, if required, to identify the most suitable crystals on the surface for subsequent laser treatment. The micro-ablation procedure aims to create a small breach in the superficial altered layer (the irradiated areas are approximately 65 × 65 μm<sup>2</sup>), thereby exposing the preserved crystal beneath and allowing for the analysis of its trace element contents with IBA. The methodology of the workflow is presented, together with its first application to archaeological lapis lazuli material: three precious beads from the ancient Royal Cemetery of Ur (Mesopotamia, 3rd millennium BCE). The results are complemented by the application of a provenance protocol already validated that proved, for the first time using a micro-invasive analytical approach, a match between the Afghan quarry district and the raw material used to carve these beads.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-05988-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial—Focus point on citizen science for physics: from education to crowdsourcing fundamental research 社论-关注物理学的公民科学：从教育到众包基础研究

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-22 DOI: 10.1140/epjp/s13360-024-05940-3

Despina Hatzifotiadou, Christian Caron

引用次数: 0

A brief study of the effects of magnesium divalent ions on the Dickerson DNA sequence at varying molar concentrations 镁二价离子在不同摩尔浓度下对迪克森DNA序列影响的简要研究

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-22 DOI: 10.1140/epjp/s13360-025-06000-0

Angad Sharma, Rakesh Kumar Mishra

引用次数: 0

CADAIT: a code for automatic design and AI training of microbeam systems CADAIT：用于微光束系统自动设计和人工智能训练的代码

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-22 DOI: 10.1140/epjp/s13360-024-05895-5

Hongjin Mou, Yanlin Li, Can Zhao, Jinlong Guo, Shi An, Jingrui An, Donghui Jin, Junshuai Li, Wei Zhang, Xiaojun Liu, Guanghua Du

{"title":"CADAIT: a code for automatic design and AI training of microbeam systems","authors":"Hongjin Mou, Yanlin Li, Can Zhao, Jinlong Guo, Shi An, Jingrui An, Donghui Jin, Junshuai Li, Wei Zhang, Xiaojun Liu, Guanghua Du","doi":"10.1140/epjp/s13360-024-05895-5","DOIUrl":"10.1140/epjp/s13360-024-05895-5","url":null,"abstract":"<div><p>A focused microbeam system with ion beams at MeV energies is a unique tool for material science, biomedical applications, and space risk evaluation. Microbeam system design traditionally relies on experienced knowledge of microbeam optics and many elaborate calculation procedures. In this work, an ion optics design code, CADAIT, is developed to design microbeam systems automatically. For a given microbeam layout, it allows for the automatic optimization of focusing conditions, the calculation of optical parameters, and the size of the focused beam through ray tracing. CADAIT enables the automatic optical design of microbeam layouts under input parameters and the selection of microbeam layouts with high performance. The accuracy of the CADAIT is verified with ion optics software packages (WinTRAX, Zgoubi, and FANM), which show good agreement. The evaluation of the performance of existing microbeam facilities with CADAIT and the application of CADAIT in the automatic design of a 12 MeV proton microbeam system are discussed. Thanks to its high efficiency in the optical design of microbeam systems, the CADAIT code is used to train artificial intelligence (AI) models for the intelligent design of microbeam systems with tremendous CADAIT-generated data. The artificial intelligence trained model, Artificial Intelligence Microbeam Producer (AIMP), is demonstrated to be capable of generating microbeam systems with superior performance and robust layouts within one minute. The above results show that CADAIT can significantly decrease the complexity and duration of microbeam optical design and prove the feasibility of intelligent microbeam design.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995357","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

BSNet: a boundary-aware medical image segmentation network BSNet：一个边界感知的医学图像分割网络

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-21 DOI: 10.1140/epjp/s13360-024-05960-z

Honghao Jiang, Ling-Fang Li, Xue Yang, Xiaojun Wang, Ming-Xing Luo

{"title":"BSNet: a boundary-aware medical image segmentation network","authors":"Honghao Jiang, Ling-Fang Li, Xue Yang, Xiaojun Wang, Ming-Xing Luo","doi":"10.1140/epjp/s13360-024-05960-z","DOIUrl":"10.1140/epjp/s13360-024-05960-z","url":null,"abstract":"<div><p>Accurate segmentation of medical images can provide foundations for clinical and disease diagnosis. Inaccurate segmentation boundaries often result from limited contextual information and insufficient discriminating feature maps after consecutive pooling and upsampling operations in most existing methods. In this paper, we present a novel boundary-aware medical image segmentation network (BSNet) for resolving the multi-objective segmentation problem. We exploit a backbone network to extract multi-scale feature representations and design an adaptive contrast boundary-aware module (ACB), which uses the method of combining nonlinear filters with deep learning to extract high-quality boundary maps. We then build a feature fusion (FF) module to fuse multi-scale features with boundary maps, providing decoder with rich multi-scale features enhanced with boundary information, and facilitating cross-channel interactions. To further enhance the uncertain regions of the boundaries, we utilize the boundary spatial enhancement (BSE) module to learn the feature map of boundary locations with the assistance of the Sobel operator. We conducted experiments with three challenging public datasets to evaluate the effectiveness of BSNet. Simulation results on various datasets show that the present model outperforms state-of-the-art segmentation methods, obtaining up to 2.73% improvement in Dice coefficient (DICE) score. BSNet opens new ways of designing better boundary-aware segmentation network.Please confirm the corresponding author is correctly identified.No problem.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995729","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

The impact of effective mass mismatch and quantum dot size on the interband absorption and sub-bandgap photocurrent of box-shaped InAs/GaAs quantum dot-intermediate band solar cells 有效质量失配和量子点尺寸对盒形InAs/GaAs量子点-中间带太阳能电池带间吸收和亚带隙光电流的影响

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-21 DOI: 10.1140/epjp/s13360-025-05982-1

Volkan Kiziloglu, Muzeyyen Saritas

{"title":"The impact of effective mass mismatch and quantum dot size on the interband absorption and sub-bandgap photocurrent of box-shaped InAs/GaAs quantum dot-intermediate band solar cells","authors":"Volkan Kiziloglu, Muzeyyen Saritas","doi":"10.1140/epjp/s13360-025-05982-1","DOIUrl":"10.1140/epjp/s13360-025-05982-1","url":null,"abstract":"<div><p>The InAs/GaAs quantum dot intermediate band solar cells (QD-IBSCs) have the potential for high conversion efficiency. In practice, their efficiencies have not reached 20%. In this study, the confined energy levels, interband absorption coefficients, and absorbed sub-bandgap photocurrent densities are calculated with QD size using equal effective mass and effective mass mismatch for the box-shaped InAs/GaAs QD system. The four-band k<span>(cdot )</span>p model was applied to the InAs/GaAs QD system. The energy of IB levels with the effective mass mismatch decreased compared with the equal effective mass. The interband photocurrent density increased with effective mass mismatch since more confined energy states contributed to interband absorption. If the in-plane QD density raised from <span>(4times 10^{10})</span> <span>(hbox {cm}^{-2})</span> to <span>(4times 10^{11} ,hbox {cm}^{-2})</span>, the interband photocurrent density increased from 0.58 to 5.19 <span>(hbox {mA/cm}^{2})</span> for equal effective mass and 0.99 to 8.38 <span>(hbox {mA/cm}^{2})</span> for the effective mass mismatch with 16 nm <span>(times )</span> 16 nm <span>(times )</span> 6 nm of QD size, under one sun concentration. Increasing the QD size also allows additional IB states within the forbidden band; thus, the interband photocurrent increases with QD size. The interband photocurrent density for 10 nm and 16 nm QD widths is 0.39 <span>(hbox {mA/cm}^{2})</span> and 0.99 <span>(hbox {mA/cm}^{2})</span>, respectively.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-05982-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-local effects in classical electrodynamics: external sources and material boundary 经典电动力学中的非局部效应：外部源和物质边界

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-21 DOI: 10.1140/epjp/s13360-025-05999-6

L. H. C. Borges, R. Bufalo

{"title":"Non-local effects in classical electrodynamics: external sources and material boundary","authors":"L. H. C. Borges, R. Bufalo","doi":"10.1140/epjp/s13360-025-05999-6","DOIUrl":"10.1140/epjp/s13360-025-05999-6","url":null,"abstract":"<div><p>In this paper, we explore non-local effects in electrodynamics in the presence of external sources and a material boundary. Specifically, we consider a model where Maxwell’s electrodynamics is modified by a specific non-local term, which describes the phenomenological Cornell’s confining potential. First, we study the interaction between stationary field sources, describing point-like charges, Dirac strings, and point-like dipoles. In this analysis, we demonstrate that the ground state energy of the hydrogen atom and also the dipole-dipole interaction are modified by these non-local effects, which contributions are used to set a stringent bounds upon the model’s parameter (measuring the non-locality effects). Moreover, we show that the non-locality stems an interaction between Dirac strings, which is absent in the Maxwell theory. In a complementary study, we investigate this model in the presence of a conducting plate. In this case, we calculate the propagator for the gauge field and the interaction force between the conducting plate and a point-like charge. It is shown that the image method is not valid for this non-local theory.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995730","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

Correction: Nonlinear coexistence phenomenon and FPGA implementation with the hybrid of memristive–memcapacitive hyperchaotic system 修正：非线性共存现象和忆容-忆容混合超混沌系统的FPGA实现

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-21 DOI: 10.1140/epjp/s13360-025-06012-w

Jingjing Xu, Xiaohong Zhang, Jahangir Moshayedi Ata

引用次数: 0

Correction: Green synthesis of Ag-doped Syzygium malaccense nanoparticles: enhancing antibacterial efficacy and photocatalytic performance 修正：绿色合成掺杂银的紫胶纳米颗粒：增强抗菌效果和光催化性能

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-01-21 DOI: 10.1140/epjp/s13360-025-06013-9

R. Benisha, M. Amalanathan, M. Sony Michael Mary, Kholood A. Dahlous, Saikh Mohammad

引用次数: 0