Mathematics, Statistics & Physics: Recent submissions
Now showing items 21-40 of 728
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Chemically reactive species in the flow of a Maxwell fluid
( Elsevier , 2017 , Article)This article presents a research for boundary layer flow and heat transfer of a Maxwell fluid over an exponential stretching surface with thermal stratifications. The effect of homogeneous and heterogeneous reaction are ... -
Analysis of ferrite nanoparticles in the flow of ferromagnetic nanofluid
( Public Library of Science , 2018 , Article)Theoretical analysis has been carried out to establish the heat transport phenomenon of six different ferromagnetic MnZnFe2O4—C2H6O2 (manganese zinc ferrite-ethylene glycol), NiZnFe2O4—C2H6O2 (Nickel zinc ferrite-ethylene ... -
A computational model for suspensions of motile micro-organisms in the flow of ferrofluid
( Elsevier , 2020 , Article)The performance of friction drag, heat transfer rate, and mass transfer is illustrated the in boundary layer flow region via density of motile microorganisms. Magnetic dipole in presence of Curie temperature and density ... -
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 ... -
Effect of asymmetrical heat rise/fall on the film flow of magnetohydrodynamic hybrid ferrofluid
( Springer Nature , 2020 , Article)The movement of the ferrous nanoparticles is random in the base fluid, and it will be homogeneous under the enforced magnetic field. This phenomenon shows a significant impact on the energy transmission process. In view ... -
OpenFOAM for computational combustion dynamics
( Springer Nature , 2022 , Article)In computational fluid dynamics (CFD), the mathematical description of a physical phenomenon that involves fluid flow, combustion, and chemical reaction is combined with a numerical solution of the problem via the use of ... -
Algorithms for simultaneous block triangularization and block diagonalization of sets of matrices
( AIMS Press , 2023 , Article)In a recent paper, a new method was proposed to find the common invariant subspaces of a set of matrices. This paper investigates the more general problem of putting a set of matrices into block triangular or block-diagonal ... -
MHD effects on nanofluid with energy and hydrothermal behavior between two collateral plates application of new semi analytical technique
( Vinca Inst Nuclear Sci , 2017 , Article)In this study, heat and mass transfer characteristic of unsteady nanofluid flow between parallel plates is investigated. The important effect of Brownian motion and thermophoresis has been included in the model of nanofluid. ... -
A New Memristive Chaotic System with a Plane and Two Lines of Equilibria
( World Scientific , 2021 , Article)A new 4D memristive chaotic system with an infinite number of equilibria is proposed via exhaustive computer search. Interestingly, such a new memristive system has a plane of equilibria and two other lines of equilibria. ... -
Evaluation of flow pattern recognition and void fraction measurement in two phase flow independent of oil pipeline's scale layer thickness
( Elsevier , 2021 , Article)The main objective of the present research is to combine the effect of scale thickness on the flow pattern and characteristics of two-phase flow that is used in oil industry. In this regard, an intelligent nondestructive ... -
Synthetic efforts and applications of metal selenide nanotubes
( Elsevier , 2021 , Article)Properties of metal selenides are dependent on their band gaps which can be tuned with size and morphology. Nanotubes particularly are important for their enhanced surface area and reaction sites. Extensive experimental ... -
Exploring EMI in STEM disciplines: a case study of KAIST
( Taylor and Francis Ltd. , 2024 , Article)This research aims to overview the English-medium instruction (EMI) situation in Korean Higher education (HE), briefly describing and studying HE policies and examining their impact on Korean teachers and students. The ... -
Factors impacting science and mathematics teachers’ competencies and self-efficacy in TPACK for PBL and STEM
( Modestum LTD , 2024 , Article)Science and mathematics teachers face the dual challenge of mastering subject-specific expertise and developing the pedagogical skills necessary for implementing integrated science, technology, engineering, and mathematics ... -
Membrane solubilization in erythrocytes as a measure of radiation exposure to fast neutrons
( IOP Publishing , 1999 , Article)Membrane solubilization and osmotic fragility of rat erythrocytes irradiated in vivo with fast neutron fluences ranging from 106 to 5 x 107 n cm-2 using a 252Cf source were measured instantaneously using a light scattering ... -
Microstructural investigation of gamma-irradiated ultra high molecular weight polyethylene in nitrogen atmosphere
( Trans Tech Publications , 2010 , Conference Paper)In this paper the results of structural changes in ultra high molecular polyethylene (UHMWPE) upon gamma irradiation and storage in nitrogen environment are reported. Based on differential scanning calorimetry (DSC), wide ... -
Effect of gamma irradiation on the microstructure and morphology of polyethylene oxide and polyvinyl alcohol blends
( Trans Tech Publications , 2010 , Conference Paper)Thin films of a blend of 90, 75, 50 (wt/wt%) percentage of polyethylene oxide and polyvinyl alcohol were synthesized and irradiated with 5, 25, 50, 100 and 200 kGy. The presence of PVA leads to diffusion controlled mechanism ... -
Investigating the individual interests of undergraduate students in STEM disciplines
( Frontiers Media SA , 2024 , Article)Despite massive investments in the education sector to empower youth in Qatar, a vital concern remains to retain students in science, technology, engineering, and mathematics (STEM) disciplines at the undergraduate level. ... -
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar's experience
( Edinburgh University Global Health Society , 2022 , Article)Background The effective reproduction number, Rt, is a tool to track and understand pandemic dynamics. This investigation of Rt estimations was conducted to guide the national COVID-19 response in Qatar, from the onset of ... -
Kappa-Distributed Electrons in Solar Outflows: Beam-Plasma Instabilities and Radio Emissions
( Springer Science and Business Media B.V. , 2023 , Article)Electrostatic (ES) wave instabilities are assumed to be at the origin of radio emissions from interplanetary shocks, and solar coronal sources are most likely induced by electron beams, more energetic but less dense than ... -
Instability of Langmuir-beam waves: Kappa-distributed electrons
( American Institute of Physics Inc. , 2023 , Article)In space plasmas, electron populations exhibit non-equilibrium velocity distributions with high-energy tails that are reproduced by the Kappa power-laws and contrast with the Maxwellian distributions often used in theoretical ...