Proceedings of the National Academy of Sciences, India Section A: Physical Sciences最新文献

Correction: Analysis of COVID-19 Model Using Atangana-Baleanu Variable Order Operator 更正：使用Atangana-Baleanu变量阶算子分析COVID-19模型

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-20 DOI: 10.1007/s40010-025-00977-0

Pratibha Verma, Surabhi Tiwari

引用次数: 0

A Ranked Set Generalized Procedure for Computing Mean Using Searls Technique: Applications to Real Data 一种利用Searls技术计算平均值的排序集广义方法：在实际数据中的应用

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-17 DOI: 10.1007/s40010-025-00976-1

Abhishek Singh, Bavita Singh, Sweta Shukla

引用次数: 0

Simulation and Analysis of Fractional Model of Human Liver with Real Data Comparison via Caputo Derivative 基于Caputo导数的人体肝脏分数模型的仿真与分析

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-09 DOI: 10.1007/s40010-025-00969-0

Lalit Mohan, Amit Prakash

引用次数: 0

On q-New Laplace Type Integral Transform of Three Variables with Applications 三变量的q-新拉普拉斯型积分变换及其应用

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-05 DOI: 10.1007/s40010-025-00973-4

Srikumar Panda, Arvind Kumar Sinha

引用次数: 0

Microbial Fuel Cells: Sustainable Energy Solutions for Wastewater Treatment-A Mini Review 微生物燃料电池：废水处理的可持续能源解决方案综述

IF 1.2 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-03 DOI: 10.1007/s40010-025-00960-9

Morteza Esfandyari, Dariush Jafari

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Estimation of the Plastic Area Around the Crack Tip Using a New Mixed Finite Element Approach 用一种新的混合有限元法估计裂纹尖端周围的塑性面积

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-03 DOI: 10.1007/s40010-025-00971-6

Ahmed Bougueroua, Hamoudi Bouzerd, Mohamed Kezzar

{"title":"Estimation of the Plastic Area Around the Crack Tip Using a New Mixed Finite Element Approach","authors":"Ahmed Bougueroua, Hamoudi Bouzerd, Mohamed Kezzar","doi":"10.1007/s40010-025-00971-6","DOIUrl":"10.1007/s40010-025-00971-6","url":null,"abstract":"<div><p>The present article presents a numerical model for analyzing interfacial fracture in ductile materials exhibiting perfectly elastoplastic behavior, taking into account the ductility induced by the increase in tension at the crack tip. The analysis of structures with cracked interfaces requires the satisfaction of interface continuity conditions—namely, the continuity of displacement and the continuity of the stress vector. To address this, a mixed finite element, designated RMQ-7, is employed to determine the size of the plastic zone (PZ) around the crack tip under both mode I and mixed-mode (I + II) loading conditions. The calculations are performed according to the Von Mises plasticity criterion, implemented within the mixed finite element framework, which incorporates the elastoplastic constitutive law of the material. The results obtained using the RMQ-7 element show good agreement with both numerical and analytical results, as verified by the maximum crack opening displacement and the classical Irwin formula. In addition, this paper addresses the problem of slant and kinking cracks. The proposed special mixed finite element, combined with the virtual crack extension technique, has been developed to evaluate the energy release rate within a single finite-element analysis. The element is defined from a parent element in the natural coordinate plane (ξ, η), which simplifies the numerical computation within each element of the simulation. Finally, an example problem involving slant cracks in a homogeneous material, drawn from the literature, is presented to assess the computational accuracy of the proposed approach.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"96 2","pages":"233 - 246"},"PeriodicalIF":1.3,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148496679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Online Education: an Artificial Intelligence-Based analysis 网络教育的影响：基于人工智能的分析

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-02 DOI: 10.1007/s40010-025-00975-2

R. Sujatha, Gali Yaswanth, Jyotir Moy Chatterjee, Ishaani Priyadarshini

{"title":"Impact of Online Education: an Artificial Intelligence-Based analysis","authors":"R. Sujatha, Gali Yaswanth, Jyotir Moy Chatterjee, Ishaani Priyadarshini","doi":"10.1007/s40010-025-00975-2","DOIUrl":"10.1007/s40010-025-00975-2","url":null,"abstract":"<div><p>Online education is one of the educational solutions for students during the COVID-19 pandemic. Worldwide, most universities have shifted much of their learning frameworks to an online learning model to limit physical interaction between people and slow the spread of COVID-19. The effectiveness of online learning depends on multiple factors, including student and instructor self-efficacy, attitudes, and confidence in using the technology involved; the educational strategies employed; the ability to monitor and evaluate educational outcomes; and student motivation, among many others. Therefore, in the present work, we will be assessing the performance and student condition in the online mode of education by predicting the degree to which students are satisfied in online mode depending on factors like internet facility, interaction in online mode, etc. We will be evaluating the data, which is collected using a survey method with almost 1000 records with 22 attributes by applying various machine learning models (XGBoost, Random Forest, Catboost, Gradient Boosting) and a deep learning model named TabNet to predict the impact of online education among the students. To enhance the accuracy of the prediction model, we have ensembled the machine learning and deep learning models. The ensemble model gave an accuracy of 86.6%, with an F1 score of 0.863 on the dataset.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"96 2","pages":"287 - 297"},"PeriodicalIF":1.3,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148496693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coinfection Dynamics of Tuberculosis with Other Infectious Diseases—A Mathematical Study 结核病与其他传染病共感染动力学的数学研究

IF 1.2 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2026-01-02 DOI: 10.1007/s40010-025-00946-7

Aditya Pandey, Archana Singh Bhadauria

引用次数: 0

Numerical Solution of Third-Order Singularly Perturbed Boundary Value Problems Via Quartic B-Spline Method 三阶奇摄动边值问题的四次b样条法数值解

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2025-12-29 DOI: 10.1007/s40010-025-00974-3

Hradyesh Kumar Mishra, Ram Kishun Lodhi

引用次数: 0

An Efficient Supply Management in Water Flow Network Using Graph Spectral Techniques Based on a Distance Laplacian Matrix 基于距离拉普拉斯矩阵的图谱技术在水流网络中的高效供应管理

IF 1.3 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2025-12-22 DOI: 10.1007/s40010-025-00972-5

Tamilselvi Gopalsamy, Vasanthi Thankappan, Sundar Chandramohan

{"title":"An Efficient Supply Management in Water Flow Network Using Graph Spectral Techniques Based on a Distance Laplacian Matrix","authors":"Tamilselvi Gopalsamy, Vasanthi Thankappan, Sundar Chandramohan","doi":"10.1007/s40010-025-00972-5","DOIUrl":"10.1007/s40010-025-00972-5","url":null,"abstract":"<div><p>The efficient management of water distribution networks (WDNs) is crucial for ensuring sustainable urban water supply. In this paper, we present a novel framework that utilizes the Distance Laplacian Matrix (DLM) to analyze and optimize WDNs. The DLM integrates distance information into the Laplacian matrix, offering valuable insights into network connectivity and dynamics. We introduce a comprehensive methodology that employs spectral analysis techniques based on the DLM to tackle key challenges in WDN management, such as critical node identification, network resilience assessment, and structural optimization. Through case studies and practical implementations, we illustrate the effectiveness of our approach in improving decision-making processes and enhancing the efficiency and resilience of WDNs. The framework offers a novel suite of Distance Laplacian Matrix techniques tailored to enhance core water management tasks and streamline the identification of water losses through optimal network partitioning. This study proposes a novel framework using the Distance Laplacian Matrix (DLM) for efficient water distribution network management. The DLM incorporates distance metrics into spectral analysis, which provides enhanced network connectivity and performance insights. Through the application of DLM-based spectral clustering, critical nodes, resilience assessments, and network optimization tasks are handled effectively. Case studies demonstrate the applicability of the framework in urban water networks, ensuring improved decision making for network partitioning and resource distribution.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"96 2","pages":"247 - 268"},"PeriodicalIF":1.3,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148496690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0