{"title":"Radii of Starlikeness and Convexity of Barnes G-Function","authors":"Samanway Sarkar, Sourav Das","doi":"10.1007/s40995-025-01788-z","DOIUrl":"10.1007/s40995-025-01788-z","url":null,"abstract":"<div><p>The primary aim of this study is to determine the radii of <i>k</i>-starlikeness, <i>k</i>-uniform convexity, and the radii of starlikeness and convexity related to the exponential function for the Barnes <i>G</i>-Function. The findings presented in this study are novel, and their significance is illustrated by several interesting consequences, examples and graphical representations.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 4","pages":"1045 - 1060"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167452","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}
Bilender P. Allahverdiev, Hüseyin Tuna, Hamlet A. Isayev
{"title":"Eigenfunction Expansions for Singular Impulsive Dynamic Dirac Systems","authors":"Bilender P. Allahverdiev, Hüseyin Tuna, Hamlet A. Isayev","doi":"10.1007/s40995-025-01783-4","DOIUrl":"10.1007/s40995-025-01783-4","url":null,"abstract":"<div><p>In this article, a spectral function for the singular impulsive dynamic Dirac system is obtained. In terms of this function, the Parseval equality and expansion formula in eigenfunctions is given.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"511 - 517"},"PeriodicalIF":1.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583388","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}
Sujay Goldar, Sk. Sarif Hassan, Krishna Pada Das, Ahmed A. Mohsen, Dahlia Khaled Bahlool, Qasem Al-Mdallal, Sourav Rana, Vikas Gupta, Purnendu Sardar
{"title":"Exploring Neimark-Sacker Bifurcation and Chaos Control in a Tri-species Discrete-Time Model","authors":"Sujay Goldar, Sk. Sarif Hassan, Krishna Pada Das, Ahmed A. Mohsen, Dahlia Khaled Bahlool, Qasem Al-Mdallal, Sourav Rana, Vikas Gupta, Purnendu Sardar","doi":"10.1007/s40995-025-01790-5","DOIUrl":"10.1007/s40995-025-01790-5","url":null,"abstract":"<div><p>This article presents a three-dimensional discrete-time ecological model to elucidate the intricate dynamics among three distinct species within an ecosystem. This approach extends traditional two-dimensional models, offering a more comprehensive perspective on ecological interactions. We identify all biologically feasible equilibria and perform a local stability analysis for each equilibrium point. Through bifurcation analysis (Neimark-Sacker and period-doubling bifurcations), we successfully demonstrate chaotic attractors via period doubling in the discrete-time model and implement chaos control through numerical simulations. By integrating this mathematical model, we derive ecological insights that contribute to informed conservation and management strategies, promoting sustainable biodiversity preservation.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 4","pages":"1075 - 1095"},"PeriodicalIF":1.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166278","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}
S. Nishath Tharanum, H. M. Parveez Ahmed, Shabanabanu, P. Beena, Sahebgouda Jambaladinni, B. M. Prasanna, M. V. Santhosh Kumar, M. R. Jagadeesh
{"title":"A Novel Approach for the Synthesis of V2O5 Thin Films Coating by Sol–Gel Technique for Anti-Corrosive Applications","authors":"S. Nishath Tharanum, H. M. Parveez Ahmed, Shabanabanu, P. Beena, Sahebgouda Jambaladinni, B. M. Prasanna, M. V. Santhosh Kumar, M. R. Jagadeesh","doi":"10.1007/s40995-024-01766-x","DOIUrl":"10.1007/s40995-024-01766-x","url":null,"abstract":"<div><p>The thin films of Vanadium Pentoxide nanoparticles (V<sub>2</sub>O<sub>5</sub>) were deposited on an Aluminium alloy-6061 (Al-6061) substrate by Sol–gel process through a spin coating technique. The film’s phase, purity, crystal nature, surface morphology, and elemental mapping of V<sub>2</sub>O<sub>5</sub> thin film on Al-6061 substrate were obtained via X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis. They also examined their anticorrosive properties through the weight loss method, electrochemical measurements such as Potentiodynamic Polarization, and Electrochemical Impedance Spectroscopic studies under various environments by immersing the substrate in acid chloride, acid sulfate, acid nitrate, and neutral chloride medium at room temperature. The obtained results reflect the improvement in the surface property against the corrosion in terms of corrosion resistance of the V<sub>2</sub>O<sub>5</sub> thin film-coated Al-6061 substrate compared to that of the bare substrate.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"655 - 665"},"PeriodicalIF":1.4,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938608","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}
{"title":"Qualitative Analysis of a Fractional-Order for a Within-Host Infection Dynamics with Adaptive Immunity Using Caputo Derivative","authors":"Marya Sadki, Zakaria Yaagoub, Karam Allali","doi":"10.1007/s40995-024-01768-9","DOIUrl":"10.1007/s40995-024-01768-9","url":null,"abstract":"<div><p>The objective of this paper is to introduce and study a within-host viral infection model via both modes of viral transmission mechanism; virus-to-cell and cell-to-cell. The proposed model incorporates the role of adaptive immunity in limiting viral pathogen spread, including humoral and cellular immune responses. This paper focuses on describing the long memory effect using the Caputo derivative. This study begins with the investigation of the well-posedness of our mathematical model concerning demonstrating the existence, positivity and boundedness of solutions. Then, it moves to introduce all the problem’s steady states, which are determined by specific reproduction numbers. Subsequently, the work proceeds to demonstrate the global stability of the five equilibria points. To evaluate the theoretical findings of global stability, we employ a numerical technique based on the fundamental theorem of fractional calculus, in addition to utilizing a three-step Lagrange polynomial interpolation method. Numerical simulations have shown the effect of drug therapies on the dynamical behavior of the fractional-order system.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"847 - 869"},"PeriodicalIF":1.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938263","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}
{"title":"Two-Field Quintessential Higgs Model and the Swampland","authors":"Mehdi Es-haghi, Moslem Zarei, Ahmad Sheykhi","doi":"10.1007/s40995-025-01777-2","DOIUrl":"10.1007/s40995-025-01777-2","url":null,"abstract":"<div><p>We study a two-field model where a quintessence field with an exponential potential <span>(e^{-beta phi /M_P})</span> is coupled to the Higgs field. It is claimed that this model is consistent with the proposed Swampland conjecture. We check this claim by calculating its inflationary observables. Although, these observables are in good agreement with the latest CMB data, but we find an upper bound <span>(beta, lesssim, 8times 10^{-3})</span> that strongly disfavors the Swampland conjecture.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 4","pages":"1163 - 1172"},"PeriodicalIF":1.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162191","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}
{"title":"Scalable Fusion Frames","authors":"Asghar Rahimi, Samrand Moayyadzadeh","doi":"10.1007/s40995-024-01765-y","DOIUrl":"10.1007/s40995-024-01765-y","url":null,"abstract":"<div><p>In this manuscript, while referring to the concepts of fusion frames and scalable frames, we introduce scalable fusion frames and we present an equivalence condition that shows that the scalability of a fusion frame is equivalent to an operator condition between the diagonal operator and the fusion frame related operators, like analysis, synthesis and frame operator.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 3","pages":"825 - 831"},"PeriodicalIF":1.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938577","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}
{"title":"Palladium Nanoparticles Supported on Guanidine-Modified Reduced Graphene Oxide as a Photocatalyst of Hydrogen Generation from Water Splitting","authors":"Mahdi Ghanbari, Sajjad Keshipour, Fatemeh Ahour","doi":"10.1007/s40995-025-01787-0","DOIUrl":"10.1007/s40995-025-01787-0","url":null,"abstract":"<div><p>Concerns about hazardous of fossil fuels for the life of thousands creatures is an enough motivation to many of researchers to work on production of hydrogen as a green fuel. Amongst various methods to generate hydrogen, photocatalytical hydrogen evolution from water splitting is considered as an invaluable approach since enjoys free sources of energy and material. To synthesis an efficient photocatalyst, a common semiconductor of nitrogen-doped reduced graphene oxide was synthesized by an absolutely simple method, including thermal treatment of citric acid and guanidine. Guanidine provides best spatial arrangement of nitrogen atoms to anchor with a transition metal catalyst, for instance palladium nanoparticles in this research. Palladium nanoparticles supported on nitrogen-doped reduced graphene oxide promoted the water splitting with the turnover frequency of hydrogen generation 306 h<sup>-1</sup> at room temperature. Easy synthesis of the photocatalyst, high yield, additive-free reaction, mild conditions, and re-usability of the photocatalyst are some advantages of the present approach.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 4","pages":"935 - 941"},"PeriodicalIF":1.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161774","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}
{"title":"Drug Repurposing for COVID 19","authors":"Fahmida Minna, Maya Mohan","doi":"10.1007/s40995-024-01763-0","DOIUrl":"10.1007/s40995-024-01763-0","url":null,"abstract":"<div><p>Drug discovery is a distinctive method of testing a drug before medical use, which is a vital step before drug development. Targets are proteins in the human cells. The drug compounds interact with the target, which helps to cure diseases of human beings. One of the most important areas of research in the field of drugs discovery is drug–target interaction (Öztürk et al. in Bioinformatics 34(17):i821–i829, 2018). It identifies interactions between proteins and targets in the human body and the chemical compounds in drugs. Several resources were wasted in terms of the cost and the time spent on research laboratory experiments to find the drug discovery. It is essential for drug discovery to make accurate predictions of drug–target interactions (DTI). A recent study found that deep learning (DL) models perform well at predicting DTI. Here now introduce Deep Purpose, an extensive and user-friendly DL library for DTI prediction. Drug repurposing is a technique for expanding or improving the use of a current drug or creating new uses for current drugs. In this case, gave pre-existing medications for the SARS CoV2 3CL protease repurposing method. The results were the ratings for each drug’s binding affinity to the SARS CoV2 3CL protease inhibitor. Building a machine learning regression model using the SARS CoV2 3CL protease inhibitor’s ChEMBL bioactivity data is also possible. It is to discover a drug’s bioactivity information for its possible effectiveness against a virus.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"319 - 330"},"PeriodicalIF":1.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583396","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}
{"title":"A New Approximation Method for Solving Stochastic Differential Equations","authors":"Faezeh Nassajian Mojarrad","doi":"10.1007/s40995-025-01778-1","DOIUrl":"10.1007/s40995-025-01778-1","url":null,"abstract":"<div><p>We present the stochastic quadratic polynomial based method, a novel solution method for Itô stochastic differential equations (SDEs). The idea is based on numerically computing the unknown function at the next two time points, and iteratively continuing this process until the final time is reached. To achieve this, the time interval is subdivided into smaller sub-intervals, and quadratic polynomials are used to approximate the solution between two successive intervals. The main properties of the stochastic numerical methods, e.g. convergence, consistency, and stability are analyzed. We test the proposed method in an SDE problem, demonstrating promising results. We also compare our method with classic stochastic schemes, such as Euler-Maruyama (EM) and Milstein schemes, and demonstrate that the proposed method achieves higher accuracy.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 4","pages":"979 - 986"},"PeriodicalIF":1.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161773","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}