Browsing Mathematics, Statistics & Physics by Title
Now showing items 251-270 of 666
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The explicit eigenvalues and eigenfunctions of the generalized neumann kernel in annular domains
( Universiti Putra Malaysia , 2019 , Article)This paper presents the explicit forms of the eigenvalues of the general-ized Neumann kernel in annular domains and the explicit forms of the corresponding eigenfunctions. It follows from these explicit forms that, except ... -
EXPLORATION of the NOVEL CORONA VIRUS TRANSITION GRAPHS with PETRINET MODELING
( World Scientific Publishing , 2021 , Article)Corona virus (CoV) is a group of viruses with non-bifurcated, single-stranded, and positive-sense RNA genomes. Apart from infecting several economically significant vertebrates (such as pigs and chickens), it is reported ... -
Exponentially weighted moving average control charts for monitoring coefficient of variation under ranked set-sampling schemes
( Taylor and Francis , 2021 , Article)Several coefficients of variation (CV) control charts under simple random schemes (SRS) have been proposed to monitor process relative variability. However, little attention has been given to investigating the performance ... -
Extended rectangular b-metric spaces and some fixed point theorems for contractive mappings
( MDPI AG , 2019 , Article)In this paper, we introduce the class of extended rectangular b-metric spaces as a generalization of both rectangular metric and rectangular b-metric spaces. In addition, some fixed point results connected with certain ... -
Extremal number of theta graphs of order 7
( Boletim da Sociedade Paranaense de Matematica , 2021 , Article)For a set of graphsF, letH(n;F) denote the class of non-bipartiteHamiltonian graphs onnvertices that does not contain any graph ofFas a subgraphandh(n;F) = max{E(G) :G∈H(n;F)}whereE(G) is the number of edges inG.In this ... -
Fabrication and applications of nickel selenide
( Academic Press Inc. , 2019 , Article)This article presents synthetic strategies of different phases and morphologies of nickel selenide in terms of solid state reactions, solvothermal and hydrothermal processes, electrodeposition, precipitation reactions, ... -
Fabrication and characterization of flexible ruthenium oxide-loaded polyaniline/poly(vinyl alcohol) nanofibers
( Wiley , 2020 , Article)© 2020 Wiley Periodicals, Inc. Polyaniline/poly(vinyl alcohol)/ruthenium oxide (RuO2) composite nanofibers were produced by electrospinning technique. Hydrous ruthenium chloride was used as a precursor at different ... -
Fabrication and characterization of poly(vinyl alcohol)-Glycerol-Spinel ferrites flexible membranes
( John Wiley and Sons Inc. , 2019 , Article)Polymer membranes of ferrites nanoparticles, glycerol, and poly(vinyl alcohol) (PVA) were fabricated using a solution casting method. Spinel ferrites nanoparticles, CuFe2O4 or ZnFe2O4, and glycerol were used as dopants to ... -
Fabrication of H2S gas sensors using ZnxCu1-xFe2O4 nanoparticles
( Springer , 2020 , Article)Spinel ferrite nanoparticles can be easily retrieved and utilized for multiple cycles due to their magnetic properties. In this work, nanoparticles of a ZnxCu1-xFe2O4 composition were synthesized by employing a sol–gel ... -
Fabrication of selective gas sensors using Fe3O4 nanoparticles decorated with CuO
( Elsevier , 2022 , Article)Metal-oxide nanoparticles are regarded as favorable candidates for different device applications including gas sensors. Decoration of nanoparticles with smaller ones of different types enables taking advantage of the ... -
Fabrication of Selective Sensors for Hg2+ Traces in Water Using Graphene Decorated with Metal Nanoclusters
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Mercury metal is released into water by different sources including sewage industrial waste, thus, it can enter human food chain. It is considered one of the most harmful pollutant of heavy metals since it is non-biodegradable, ... -
Factors affecting university image among graduate alumni: A case study of Qatar university
( Elsevier , 2022 , Article)Various factors influence the students' perception of universities and university image. This study explores five factors affecting university image among Graduate Alumni. Surveys, administered to 597 graduate alumni were ... -
Fast and Accurate Computation of the Logarithmic Capacity of Compact Sets
( Springer Berlin Heidelberg , 2017 , Article)We present a numerical method for computing the logarithmic capacity of compact subsets of C, which are bounded by Jordan curves and have finitely connected complement. The subsets may have several components and need not ... -
Fate of accidental symmetries of the relativistic hydrogen atom in a spherical cavity
( Elsevier Masson , 2015 , Article)The non-relativistic hydrogen atom enjoys an accidental SO(4) symmetry, that enlarges the rotational SO(3) symmetry, by extending the angular momentum algebra with the Runge–Lenz vector. In the relativistic hydrogen atom ... -
Finding the Nearest Negative Imaginary System with Application to Near-Optimal Controller Design
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Conference Paper)In this paper, we consider the problem of robust stabilization of linear time-invariant systems with respect to unmodeled dynamics and structure uncertainties. To that end, we first present a methodology to find the nearest ... -
First down converter multilayers integration in an industrial Si solar cell process
( John Wiley and Sons Ltd , 2019 , Article)Down converter SiNx:Yb3+/SiNx:Tb3+ multilayers are deposited by reactive magnetron cosputtering with the objective of optimizing the interaction distance between Tb3+ and Yb3+ ions to favor a better light management in Si ... -
First principle investigation of H2Se, H2Te and PH3 sensing based on graphene oxide
( Elsevier , 2020 , Article)Detecting toxic gases is of great importance to protect our health and preserve the quality of life. In this work, graphene (G) and graphene oxide with three different modifications (G–O, G–OH, and G–O–OH) have been used ... -
Fitted Galerkin spectral method to solve delay partial differential equations
( John Wiley and Sons Ltd , 2016 , Article)In this paper, we consider a class of parabolic partial differential equations with a time delay. The first model equation is the mixed problems for scalar generalized diffusion equation with a delay, whereas the second ... -
Fixed point results for generalized chatterjea type contractive conditions in partially ordered G-metric spaces
( Hindawi Publishing Corporation , 2014 , Article)In the framework of ordered G -metric spaces, fixed points of maps that satisfy the generalized Chatterjea type contractive conditions are obtained. The results presented in the paper generalize and extend several well ... -
Fixed point results of F-rational cyclic contractive mappings on 0-complete partial metric spaces
( Forum-Editrice Universitaria Udinese SRL , 2018 , Article)Wardowski [19] introduced a new concept of contraction which called F-contraction and proved a fixed point theorem on complete metric space. Following this direction of research, in this paper, we introduce an F-rational ...