Iranian Journal of Science and Technology, Transactions A: Science最新文献

{"title":"An Improvised Cubic B-spline Collocation of Fourth Order and Crank–Nicolson Technique for Numerical Soliton of Klein–Gordon and Sine–Gordon Equations","authors":"Saumya Ranjan Jena,&nbsp;Archana Senapati","doi":"10.1007/s40995-024-01727-4","DOIUrl":"10.1007/s40995-024-01727-4","url":null,"abstract":"<div><p>This article examines the nonlinear hyperbolic Klein–Gordon equation (KGE) and sine–Gordon equation (SGE) with Crank–Nicolson and the finite element method (FEM) based on an improvised quartic order cubic B-spline collocation approach and explores their novel numerical solutions along with computational complexity. This work explains the parameters such as Euclidean error norms <span>({L}_{2})</span>, maximum absolute error <span>({L}_{infty })</span>, and root-mean-square (RMS) error with computational time cost, experimental order of convergence (EOC), and three conservative laws <span>({I}_{1},{I}_{2},{I}_{3})</span> of mass momentum and energy conservation, respectively. It is demonstrated that the method is unconditionally stable with the von-Neumann process and accurate to convergence of order O (<span>({h}^{4}+Delta t))</span>. Finally, four test examples are investigated to support our assertion, and the experimental findings are compared to existing approaches using software tools like MATLAB and MATHEMATICA. 2D and 3D graphical representations of solutions are also presented and compared with the exact solution and results of others.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"383 - 407"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583385","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":"Bounds in Normed Spaces Using Convex Functions","authors":"Mohammad Sababheh,&nbsp;Shigeru Furuichi,&nbsp;Nicuşor Minculete,&nbsp;Hamid Reza Moradi","doi":"10.1007/s40995-024-01730-9","DOIUrl":"10.1007/s40995-024-01730-9","url":null,"abstract":"<div><p>In this paper, we present several new bounds in normed spaces, with applications towards subadditivity behavior and angular distances, in these spaces, with an additional application towards Hilbert space operators. The main tool we use to establish our results is the treatment of convex functions and their properties.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"419 - 426"},"PeriodicalIF":1.4,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583384","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":"Cancellation Property for Acts Over Monoids","authors":"Kamal Ahmadi,&nbsp;Ali Madanshekaf","doi":"10.1007/s40995-024-01728-3","DOIUrl":"10.1007/s40995-024-01728-3","url":null,"abstract":"<div><p>The cancellation property in the theory of actions over a monoid is introduced and examined in this paper. We will find some significant classes of acts which are cancellable. In addition, we give a characterization of cancellable acts. Then, we prove that every act is cancellable if and only if it is internally cancellable. Finally, using significant properties of refinement monoids, we show that any Dedekind-finite <i>S</i>-act is cancellable and it has also multiplicative cancellation in the category of Dedekind-finite <i>S</i>-acts with a unique zero.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"409 - 417"},"PeriodicalIF":1.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583620","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":"Exploration of Photoactive Cd2+ Substitutions on V2O5 Nanoparticles and Their Catalytic Potential Against the Toxic Dye","authors":"A. Remila,&nbsp;V. Shally,&nbsp;C. Parvathiraja,&nbsp;T. Darwin","doi":"10.1007/s40995-024-01704-x","DOIUrl":"10.1007/s40995-024-01704-x","url":null,"abstract":"<div><p>This study focuses on the synthesis and broad characterization of cadmium-doped vanadium pentoxide (Cd-doped V₂O₅) nanoparticles via the co-precipitation method, emphasizing the investigation of varying Cd²⁺ concentrations in V₂O₅. The synthesized nanoparticles were extensively characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS), revealing crystallite sizes ranging from 24 to 29 nm, identifying functional groups, and elucidating bandgap energies from 2.07 to 1.88 eV. Morphological analyses by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) confirmed the presence of rod-like nanostructures without agglomeration. Energy-dispersive X-ray spectroscopy (EDX) confirmed successful Cd²⁺ integration into the V₂O₅ structure, while further characterization via X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy provided insights into valency, electron states, and material affinity. The catalytic activity of Cd-doped V₂O₅ nanoparticles in degrading Rhodamine B (Rh-B) dye was investigated under various conditions. pH variations notably influenced degradation rates, with acidic and alkaline environments demonstrating enhanced degradation capabilities due to electrostatic interactions and increased catalytic activity, respectively. Optimal catalytic efficiency was observed at a nanoparticle concentration of 10 mg, with declining efficiency attributed to surface area saturation at higher concentrations. Increasing dye concentrations inversely correlated with degradation percentages due to reduced hydroxyl radical formation. Reusability studies indicated consistent degradation efficiency over multiple cycles, suggesting promising applications of Cd-doped V₂O₅ nanoparticles in sustainable wastewater treatment.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"33 - 48"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109159","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":"Optical, Structural and Mechanical Properties of Ag2O2/Ag2CO3 Nanocomposite Synthesized by Air-Plasma Electrolysis","authors":"Saeed Ebrahimi,&nbsp;Masoud Rezvani Jalal,&nbsp;Seyyedeh Fatemeh Hosseini","doi":"10.1007/s40995-024-01720-x","DOIUrl":"10.1007/s40995-024-01720-x","url":null,"abstract":"<div><p>Synthesis of nanocomposite Ag₂O₂/Ag₂CO₃ by the new method of pin-to-solution air-plasma electrolysis and effect of electrolyte concentration on its morphological, structural, mechanical and optical properties are considered in the present paper. XRD analysis reveals that, independent on the concentration, the nanocomposite has monoclinic and hexagonal crystal structure. Mechanical characterization by the Williamson-Hall method shows that the crystallite size of the composite synthesized in high concentration (0.3 M) is 40 nm and the lattice strain and dislocation density are − 0.0002 and 6.149×10¹⁴ line/m², respectively. TEM images and XRD pattern show that reduction of the solution concentration (to 0.2 molar) leads to smaller crystallite size (~ 17 nm) and increased lattice defects. By FTIR spectroscopy, chemical bonds of the sample are studied and formation of the expected bonds is confirmed. Optical characterization of the nanocomposites by UV–Vis spectroscopy through DASF analysis shows that the transition is direct allowed with 0.9 eV gap. Other parameters such as Urbach energy, steepness parameter, strength of the electron–phonon interaction, refractive index and dielectric constant are also determined. It is found that the concentration has a small effect on most of the optical properties of the obtained nanocomposites.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"531 - 540"},"PeriodicalIF":1.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583508","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":"Mathematical Study of Nabla Fractional Difference Tech Layoff Model","authors":"Kottakkaran Sooppy Nisar,&nbsp;Ravichandran Chokkalingam,&nbsp;Sabarinathan Sriramulu,&nbsp;Selvam Arunachalam","doi":"10.1007/s40995-024-01721-w","DOIUrl":"10.1007/s40995-024-01721-w","url":null,"abstract":"<div><p>This research aims to analyze the numerical solution and stability of the tech layoff model using the nabla difference fractional order derivative based on the Atangana–Baleanu in Caputo sense. In the analytical section of this article, we will present a novel formula for nabla fractional differences, which can be useful for obtaining stability results. Firstly, we formulate the tech layoff model and describe the problem. Secondly, we establish both the existence and uniqueness analysis by employing fixed-point techniques for the given model. We find that the projected model exists as a unique solution that adheres to the stability state of Ulam–Hyers stability conditions. Additionally, we apply a numerical scheme based on an approximate solution in a series to simulate the proposed model, employing an iterative technique. Finally, we present numerical simulations to corroborate the theoretical study. These results clearly demonstrate the notably impactful effect of the nabla difference fractional order derivative on the model behavior.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"345 - 356"},"PeriodicalIF":1.4,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583519","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":"DNAzyme Loaded Nano-Niosomes Confer Anti-Cancer Effects in the Human Breast Cancer MCF-7 Cells by Inhibiting Apoptosis, Inflammation, and c-Myc/cyclin D1","authors":"Leila Aghamohseni,&nbsp;Kavian Barzegarian,&nbsp;Mohammadreza Ferdowsinia,&nbsp;Neda Mousavi-Niri,&nbsp;Maryam Naseroleslami","doi":"10.1007/s40995-024-01731-8","DOIUrl":"10.1007/s40995-024-01731-8","url":null,"abstract":"<div><p>One of the promising strategies for destroying cancer cells is using small-molecule gene-silencing strategies such as DNAzyme. In the current study, we used niosomes as carriers to promote drug residence and stability in the human breast cancer MCF-7 cells and explore possible molecular mechanisms. Preparing the niosomes was performed using thin-layer hydration method. Shape and size of the niosomes were assessed using transmission electron microscopy (TEM). Cell cytotoxicity, invasion and migration, apoptosis, inflammation and apoptosis related genes were evaluated by MTT assay, wound healing assay, flow cytometry, and Real-time PCR. Our results showed that DNAzyme loaded niosomes had more powerful effects against proliferation and migration of the human breast cancer MCF-7 cells compared to free DNAzyme. Effects of DNAzyme loaded niosomes is attributed to elevation of apoptosis, suppressing pro-inflammatory cytokines, and down-regulation of c-Myc/cyclin D1. In conclusion, our study declares that DNAzyme loaded niosomes possess stronger effects on destroying the human breast cancer MCF-7 cells than free DNAzyme by targeting apoptosis, inflammation, and c-Myc/cyclin D1.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1397 - 1410"},"PeriodicalIF":1.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524430","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":"Cylindrical Gravastar Structure in Energy–momentum Squared Gravity","authors":"M. Sharif,&nbsp;Saba Naz","doi":"10.1007/s40995-024-01715-8","DOIUrl":"10.1007/s40995-024-01715-8","url":null,"abstract":"<div><p>We discuss the gravastar structure referred to as Mazur and Mottola model by taking into account the cylindrically symmetric line element. Gravastar configuration is completely characterized by three regions including inner and outer sectors where a very thin layer of ultra-relativistic matter namely shell domain separates these both regions. The interior sector occupying dark energy (cause of repulsive force) is specified by de-Sitter spacetime. Moreover, the exterior is fully vacuum where state parameters (density and pressure) are zero. The classical de-Sitter and Schwarzschild event horizons are replaced by an intermediate shell of small thickness, which is thought to be the critical surface for the quantum phase transition. For each of these three regions, we use different values of the equation of state parameter. We build a gravastar structure by adopting a particular model of the theory under consideration. For an isotropic static cylindrical matter configuration, we develop the equations of motion. Over hypersurface, matching of the interior as well as exterior regions yields surface energy density and surface pressure. The crucial feature of the newly obtained solution is that it is singularity free. Along with the estimation for the total gravastar mass, the energy density, total energy, proper length, mass and entropy of the shell domain are investigated in correspondence with this model. The developed gravastar model is physically viable and stable.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1669 - 1677"},"PeriodicalIF":1.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524395","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":"Approximation by Generalised Szász-type Operators based on Appell Polynomials","authors":"Ajay Kumar","doi":"10.1007/s40995-024-01703-y","DOIUrl":"10.1007/s40995-024-01703-y","url":null,"abstract":"<div><p>This paper introduces a novel extension of Szász–Kantorovich-type operators based on Appell polynomials and explores their convergence characteristics employing Korovkin’s theorem. The study delves into the rate of convergence using both classical and second-order modulus of continuity, Voronovskaja type theorem, and weighted approximation outcomes.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"181 - 189"},"PeriodicalIF":1.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108184","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":"Multiplication Operators on Generalized Orlicz Spaces Associated to Banach Function Spaces","authors":"Büsra Aris,&nbsp;Serap Öztop,&nbsp;Seyyed Mohammad Tabatabaie,&nbsp;Badik Hüseyin Uysal,&nbsp;Rüya Üster","doi":"10.1007/s40995-024-01723-8","DOIUrl":"10.1007/s40995-024-01723-8","url":null,"abstract":"<div><p>In this paper, we study multiplication operators on generalized Orlicz spaces <span>(X^Phi)</span> associated to a Banach function space <i>X</i>, where <span>(Phi)</span> is a Young function, and give some characterization of them to be well-defined and bounded. Also, we present some sufficient and necessary conditions for such operators to be compact or invertible. Moreover, we find the essential norm of a multiplication operator on <span>(X^Phi)</span> while the context measure space is discrete. Many results of this paper cover known Banach function spaces related to Orlicz one.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1489 - 1497"},"PeriodicalIF":1.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524426","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}