The European Physical Journal Special Topics最新文献

Master–slave synchronization of electrocardiogram chaotic networks dealing with stochastic perturbance 处理随机扰动的心电图混沌网络的主从同步化

The European Physical Journal Special Topics Pub Date : 2024-09-19 DOI: 10.1140/epjs/s11734-024-01303-2

N. Ramesh Babu, R. Vijay Aravind, P. Balasubramaniam

引用次数: 0

Classification of sprott chaotic systems via projection of the attractors using deep learning methods 利用深度学习方法，通过投影吸引子对斯普罗特混沌系统进行分类

The European Physical Journal Special Topics Pub Date : 2024-09-19 DOI: 10.1140/epjs/s11734-024-01329-6

Akif Akgul, Emre Deniz, Berkay Emin, Hüseyin Çizmeci, Yusuf Alaca, Ömer Faruk Akmeşe, Selim Özdem

{"title":"Classification of sprott chaotic systems via projection of the attractors using deep learning methods","authors":"Akif Akgul, Emre Deniz, Berkay Emin, Hüseyin Çizmeci, Yusuf Alaca, Ömer Faruk Akmeşe, Selim Özdem","doi":"10.1140/epjs/s11734-024-01329-6","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01329-6","url":null,"abstract":"This study uses deep learning methods to classify the projection of the attractor’s images of five different chaotic systems. The chaotic systems addressed in the research are Sprott C, Sprott F, Sprott G, Sprott H, and Sprott M. A dataset was created for classification using the projection of attractors of these five different chaotic systems. This dataset contains time series images, and the graphs are generated based on initial conditions, Runge–Kutta 4 step size, and time length. Deep learning methods such as ResNet50, ResNet50V2, VGG19, InceptionV3, MobileNetV2, and VGG16 have been utilized for classification. This study's classification accuracy varies between 91.6% and 99.9%, depending on the problem. Therefore, this research accurately determines which chaotic system a projection of the attractors graphic image belongs to. This high accuracy demonstrates the usability of this model in analyzing chaotic systems in real-world applications. Such accuracies can be considered a powerful tool in analyzing industrial systems or other systems with complex structures. This work successfully uses deep learning methods for classifying chaotic systems. Such research could be an important step toward understanding and managing complex systems.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265579","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

Approximate controllability results of $$psi$$ -Hilfer fractional neutral hemivariational inequalities with infinite delay via almost sectorial operators 通过近似扇形算子实现具有无限延迟的 $$psi$$ -Hilfer 分数中性半变量不等式的近似可控性结果

The European Physical Journal Special Topics Pub Date : 2024-09-19 DOI: 10.1140/epjs/s11734-024-01326-9

G. Gokul, R. Udhayakumar

引用次数: 0

Fmri study of changes in large-scale brain networks during affective touch 情感触觉过程中大规模大脑网络变化的 Fmri 研究

The European Physical Journal Special Topics Pub Date : 2024-09-16 DOI: 10.1140/epjs/s11734-024-01330-z

Vladimir Khorev, Galina Portnova, Anastasia Kushnir, Larisa Mayorova

{"title":"Fmri study of changes in large-scale brain networks during affective touch","authors":"Vladimir Khorev, Galina Portnova, Anastasia Kushnir, Larisa Mayorova","doi":"10.1140/epjs/s11734-024-01330-z","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01330-z","url":null,"abstract":"The importance of touch in human social development and interpersonal interactions is widely recognized, yet the underlying neurological processes remain relatively unexplored. To better understand these mechanisms, we analyzed functional magnetic resonance imaging (fMRI) data to investigate how affective touch influences brain activity. Our study employed independent component analysis (ICA) and cluster analysis to identify brain components that exhibit significant changes following tactile stimulation. These components were then mapped to large-scale brain networks, focusing on those with the most pronounced spatial intensity differences. Our findings highlight the crucial role of distinct brain networks in processing tactile sensations. Notably, we observed significant changes in the default mode network (DMN) activity, particularly in the control group, after the touch experiment. Additionally, specific alterations were detected in the amygdala, cuneus, and orbitofrontal cortex. This study sheds light on the neurological foundations of tactile experiences and their potential impact on behavior and emotional states. Understanding these processes could inform the development of therapeutic strategies that leverage touch to alleviate stress and enhance mental health.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"189 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265585","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

Opto-electro-thermal simulation of heat transfer in monocrystalline silicon solar cells 单晶硅太阳能电池传热的光电热模拟

The European Physical Journal Special Topics Pub Date : 2024-09-16 DOI: 10.1140/epjs/s11734-024-01305-0

Allyson Tarifa, Eon Soo Lee, Nuggehalli M. Ravindra

{"title":"Opto-electro-thermal simulation of heat transfer in monocrystalline silicon solar cells","authors":"Allyson Tarifa, Eon Soo Lee, Nuggehalli M. Ravindra","doi":"10.1140/epjs/s11734-024-01305-0","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01305-0","url":null,"abstract":"In the area of photovoltaics, monocrystalline silicon solar cells are ubiquitously utilized in buildings, commercial, defense, residential, space, and transportation applications throughout the world. Their performance is impeded by the heating of the cells during their interaction with the incident solar radiation. The development of reliable computer simulations that effectively model the thermal response of monocrystalline silicon solar cells is critical for their design, fabrication, and utilization. This work employs a novel computer simulation to incorporate the optical, electrical, and thermal properties of silicon in the thermal analysis of silicon solar cells. After establishing the theoretical principles and the values of these properties, the results of the simulation are compared with other established studies. The analysis shows that the percentage difference in solar cell temperatures between simulation and literature is within a range of 0.354–0.487%. The proposed simulation shows that the visible range of wavelengths is the dominant source of heating in commercial monocrystalline silicon solar cells.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265589","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

Jet substructure probe to freeze-in dark matter in alternative cosmological background 另类宇宙学背景中冻结暗物质的喷流子结构探测器

The European Physical Journal Special Topics Pub Date : 2024-09-16 DOI: 10.1140/epjs/s11734-024-01233-z

Saumyen Kundu, Sudipta Show, Partha Konar, Prasanta Kumar Das

引用次数: 0

Characterization of magnetic nanoparticles for magnetic particle spectroscopy-based sensitive cell quantification 用于基于磁粉光谱的灵敏细胞定量分析的磁性纳米粒子的特征描述

The European Physical Journal Special Topics Pub Date : 2024-09-16 DOI: 10.1140/epjs/s11734-024-01312-1

Jian Wei, Shaoqi Sun, Chun Xia, Alexey O. Ivanov, Ekaterina A. Elfimova, Chunhao Yin, Rong Cai, Shijie Sun, Lijun Xu, Jing Zhong

{"title":"Characterization of magnetic nanoparticles for magnetic particle spectroscopy-based sensitive cell quantification","authors":"Jian Wei, Shaoqi Sun, Chun Xia, Alexey O. Ivanov, Ekaterina A. Elfimova, Chunhao Yin, Rong Cai, Shijie Sun, Lijun Xu, Jing Zhong","doi":"10.1140/epjs/s11734-024-01312-1","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01312-1","url":null,"abstract":"In the era of precision medicine, cell-based therapy is one of the most promising techniques to fight against cancer cells or for the regeneration of diseased tissues/organs. In cell-based therapy, sensitive and quantitative detection of cells is of great importance and interest to understand the behavior of the cells in vivo. Existing techniques, including magnetic resonance imaging, X-ray computed tomography and optical imaging, suffer from some limitation on sensitive cell quantification. In this paper, we report on the approach of sensitive and quantitative detection of magnetic nanoparticle (MNP)-labelled cells with magnetic particle spectroscopy (MPS). The influence of the MNP dynamics on the MPS signal of the MNPs is investigated and analyzed. Finally, the MPS signal of the MNPs is measured to quantify cell amount with a limit-of-detection of 200 and with a linearity of better than 98%. The work presented in this paper has great potential for providing a novel tool for in vivo cell detection and tracking during cell-based therapy.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265582","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

Insight into the Hamilton and Crosser model for ternary hybrid nanofluid flow over a Riga wedge with heterogeneous catalytic reaction 汉密尔顿和克罗瑟三元混合纳米流体流过里加楔块与异质催化反应模型的深入研究

The European Physical Journal Special Topics Pub Date : 2024-09-16 DOI: 10.1140/epjs/s11734-024-01319-8

A. M. Obalalu, S. H. A. M. Shah, Adil Darvesh, Umair Khan, Anuar Ishak, Peter Adegbite, O. B. Ojewola, Taseer Muhammad, Ahmed M. Galal

{"title":"Insight into the Hamilton and Crosser model for ternary hybrid nanofluid flow over a Riga wedge with heterogeneous catalytic reaction","authors":"A. M. Obalalu, S. H. A. M. Shah, Adil Darvesh, Umair Khan, Anuar Ishak, Peter Adegbite, O. B. Ojewola, Taseer Muhammad, Ahmed M. Galal","doi":"10.1140/epjs/s11734-024-01319-8","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01319-8","url":null,"abstract":"The present article is designed to study the Hamilton and Crosser model applied to the flow of ternary hybrid nanofluids over a Riga wedge, incorporating the effects of heterogeneous catalytic reactions. The complex interactions within the ternary hybrid nanofluids, comprising three distinct nanoparticles suspended in a base fluid, present significant challenges in accurately predicting flow and thermal characteristics. The Hamilton and Crosser model, known for its efficacy in determining the thermal conductivity of composite materials, is employed to analyze this intricate system. The analysis reveals the model's potential in offering a comprehensive understanding of the thermal and fluid dynamics involved, highlighting its suitability for predicting the behavior of ternary hybrid nanofluids in the presence of catalytic reactions. The governing model equations and boundary conditions are non-dimensionalized by introducing suitable similarity transformations. Thereafter, the computational Chebyshev collocation spectral technique implemented in the MATHEMATICA 11.3 software is used to calculate the numerical solution. The study reveals that the Casson parameter has a negative influence on the velocity distribution, causing it to reduce as the Casson parameter rises. This research contributes to the advancement of modeling techniques for complex fluid systems, with implications for enhanced design and optimization in various industrial and engineering applications.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269669","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

Iterative boundary element method for modeling an inverted T-type porous barrier in presence of ocean currents 为存在洋流的倒 T 型多孔屏障建模的迭代边界元法

The European Physical Journal Special Topics Pub Date : 2024-09-13 DOI: 10.1140/epjs/s11734-024-01327-8

Santanu Kumar Dash, Santanu Koley

引用次数: 0

Development of a centrifugal flow left ventricular assist device through hydrodynamic simulation and in vitro experimentation 通过流体力学模拟和体外实验开发离心流左心室辅助装置

The European Physical Journal Special Topics Pub Date : 2024-09-12 DOI: 10.1140/epjs/s11734-024-01315-y

Pulak Kumar Ray, Sumanta Laha, Arup Kumar Das, Prasanta Kumar Das

{"title":"Development of a centrifugal flow left ventricular assist device through hydrodynamic simulation and in vitro experimentation","authors":"Pulak Kumar Ray, Sumanta Laha, Arup Kumar Das, Prasanta Kumar Das","doi":"10.1140/epjs/s11734-024-01315-y","DOIUrl":"https://doi.org/10.1140/epjs/s11734-024-01315-y","url":null,"abstract":"Left ventricular assist devices (LVADs) have proven to be the best alternative treatment to address the increasing number of heart failures, while donors are in short supply. However, ventricular assist devices (VADs) have been linked to thrombosis, hemolysis, and other postoperative complications. Despite significant technological advancements, blood damage caused by high shear stress generation has remained a serious concern, which is greatly attributed to the VAD's geometry. The goal of this research is to develop a centrifugal pump design using computational fluid dynamics (CFD) and experimental evaluation. Based on characteristics such as pressure head generation, flow rate, maximum wall shear stress, and hydraulic efficiency, the simulations produce a pump design suitable for mechanical circulatory support. The subsequent experimental testing for pressure head and flow rates validate the CFD outcomes. Further, the pump is installed in an indigenously designed mock circulation loop to examine its capability as an LVAD. The outcomes of CFD and experimental studies reveal that the developed pump is well capable of delivering blood with a flow rate at the required pressure as per desired physiological requirements. Also, the wall shear stress values are within the limit (< 300 N/m2) to avoid any blood damage.","PeriodicalId":501403,"journal":{"name":"The European Physical Journal Special Topics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142219032","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