Browsing Mathematics, Statistics & Physics by Title
Now showing items 328-347 of 726
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High sensitivity H2S gas sensors using lead halide perovskite nanoparticles
( Elsevier , 2022 , Article)We report the development of a high sensitivity H2S gas sensor based on perovskite nanoparticles, which can be synthesized using relatively simple solution-growth methods. The gas sensor was fabricated from the metal halide ... -
Higher order self-adjoint operators with polynomial coefficients
( Texas State University - San Marcos , 2017 , Article)We study algebraic and analytic aspects of self-adjoint operators of order four or higher with polynomial coefficients. As a consequence, a systematic way of constructing such operators is given. The procedure is applied ... -
Higher order self-adjoint operators with polynomial coefficients
( Texas State University - San Marcos , 2017 , Article)We study algebraic and analytic aspects of self-adjoint operators of order four or higher with polynomial coefficients. As a consequence, a systematic way of constructing such operators is given. The procedure is applied ... -
History of primary-series and booster vaccination and protection against Omicron reinfection
( American Association for the Advancement of Science , 2023 , Article)Laboratory evidence suggests a possibility of immune imprinting for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. We investigated the differences in the incidence of SARS-CoV-2 reinfection in a ... -
HIV incidence and impact of interventions among female sex workers and their clients in the Middle East and north Africa: a modelling study
( Elsevier , 2022 , Article)Background: The incidence of HIV infection among female sex workers and their clients in the Middle East and north Africa is not well known. We aimed to assess HIV incidence, the contribution of heterosexual sex work ... -
Homotopy analysis method for fractional IVPs
( Elsevier , 2007 , Article)In this paper, the homotopy analysis method is applied to solve linear and nonlinear fractional initial-value problems (fIVPs). The fractional derivatives are described by Caputo’s sense. Exact and/or approximate analytical ... -
Homotopy perturbation method for nonlinear partial differential equations of fractional order
( Elsevier B.V. , 2007 , Article)The aim of this Letter is to present an efficient and reliable treatment of the homotopy perturbation method (HPM) for nonlinear partial differential equations with fractional time derivative. The fractional derivative is ... -
Horvitz-thompson estimator of population mean under inverse sampling designs
( Iranian Mathematical Society , 2012 , Article)Inverse sampling design is generally considered to be an appropriate technique when the population is divided into two subpopulations, one of which contains only a few units. Here, we de- rive the Horvitz-Thompson estimator ... -
Hybrid differential evolutionary strawberry algorithm for real-parameter optimization problems
( Bellwether Publishing, Ltd. , 2021 , Article)Evolutionary algorithms (EAs) is a family of population-based nature optimization methods. In contrast to classical optimization techniques, EAs provide a set of approximated solutions for different test suites of optimization ... -
Hybrid isothermal model for the ferrohydrodynamic chemically reactive species
( Institute of Physics Publishing , 2019 , Article)A hybrid isothermal model for the homogeneous-heterogeneous reactions in ferrohydrodynamic boundary layer flow is established. The characteristics of Newtonian heating and magnetic dipole in a ferrofluid due to a stretchable ... -
Hydrodynamics and ferrite nanoparticles in hybrid nanofluid
( Elsevier , 2020 , Article)The solids have higher heat transfer rate comparative to fluids, thus, in the present article, two different ferrite nano-particles are suspended in two different base fluids to demonstrates its impacts on the friction ... -
Hydrogen Atom and Equivalent Form of the Levy-Leblond Equation
( Institute of Physics Publishing , 2017 , Article)We discuss the equivalent form of the Levy-Leblond equation such that the nilpotent matrices are two-dimensional. We show that this equation can be obtained in the non-relativistic limit of the (2+1)-dimensional Dirac ... -
Hydromagnetic couple-stress nanofluid flow over a moving convective wall: OHAM analysis
( Elsevier Ltd , 2016 , Article)This communication presents the magnetohydrodynamics (MHD) flow of a couple-stress nanofluid over a convective moving wall. The flow dynamics are analyzed in the boundary layer region. Convective cooling phenomenon combined ... -
Image encryption scheme for multi-focus images for visual sensors network
( Springer , 2022 , Article)Image fusion is the technique to obtain an image, possessing spatially and spectrally enhanced as compared to the individual high spatial and high spectral images. After obtaining a detailed image, propagation over an ... -
Impact of COVID-19 Pandemic News on the Cryptocurrency Market and Gold Returns: A Quantile-on-Quantile Regression Analysis
( MDPI , 2022 , Article)In this paper, we investigate the relationship between the RavenPack news-based index associated with coronavirus outbreak (Panic, Sentiment, Infodemic, and Media Coverage) and returns of two commodities—Bitcoin and gold. ... -
Impact of magnetic dipole on a thermally stratified ferrofluid past a stretchable surface
( SAGE Publications Ltd , 2019 , Article)This article focuses on the characteristics of a magnetic dipole in a viscous ferrofluid induced by linear stretched surface. The analysis is disclosed by thermally stratified phenomenon and stagnation point. It is also ... -
Improved Likelihood Inference Procedures for the Logistic Distribution
( MDPI , 2022 , Article)We consider third-order likelihood inferences for the parameters, quantiles and reliability function of the logistic distribution. This theory involves the conditioning and marginalization of the likelihood function. The ... -
Improved Nonparametric Control Chart Based on Ranked Set Sampling with Application of Chemical Data Modelling
( Hindawi Limited , 2022 , Article)e statistical performance of parametric control charts is questionable when the underlying process does not follow any speci ed probability distribution. Nonparametric control charts are the best substitute for this ... -
Improved simple linear profiling method with application to chemical gas sensors
( John Wiley and Sons Ltd , 2021 , Article)In industrial applications, a functional relationship between the quality characteristics of interest is well represented by profile functions. These are often characterized by linear or nonlinear relationships that depend ... -
Individual and network characteristic associated with hospital-acquired Middle East Respiratory Syndrome coronavirus
( Elsevier Ltd , 2019 , Article)Background: During outbreaks of infectious diseases, transmission of the pathogen can form networks of infected individuals connected either directly or indirectly. Methods: Network centrality metrics were used to characterize ...