Mathematics, Statistics & Physics: Recent submissions
Now showing items 421-440 of 728
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Selective H2S sensor based on CuO nanoparticles embedded in organic membranes
( Elsevier B.V. , 2016 , Article)We report on H2S gas sensors based on CuO nanoparticles that are embedded within polymer membranes of poly-vinyl-alcohol (PVA) and glycerol ionic liquid (IL). The nanoparticles were fabricated by the colloid microwave ... -
Nonexistence results for the Cauchy problem for some fractional nonlinear systems of thermo-elasticity type
( Wiley-VCH Verlag , 2016 , Article)We study the nonexistence of global solutions to the Cauchy problem for systems of parabolic-hyperbolic or hyperbolic thermo-elasticity equations posed in RN. For power nonlinearities, we present threshold critical exponents ... -
Why is it so difficult to attract FDI to the MENA countries ?
( Science Publications , 2016 , Article)In this study we constructively argue that the relationship between FDI flows and the per capita GDP for the MENA countries has a novel feature-hitherto unrecognised-which can partially explain the great difficulty of the ... -
Comparison of Interval Estimators of Pr(X < Y) in the Two-parameter Exponential Distribution
( Taylor and Francis Inc. , 2016 , Article)We consider confidence intervals for the stress-strength reliability Pr(X< Y) in the two-parameter exponential distribution. We have derived the Bayesian highest posterior density interval using non-informative prior ... -
New parametric solutions of some abel equations
( University of Miskolc , 2016 , Article)New parametric solutions of some Abel equations of second kind are found. The scheme for construction of these solutions utilizes a combination of differential invariants of a symmetry of an associated second order ODE and ... -
Metal/Metal-Oxide Nanoclusters for Gas Sensor Applications
( Hindawi Publishing Corporation , 2016 , Article Review)The development of gas sensors that are based on metal/metal-oxide nanoclusters has attracted intensive research interest in the last years. Nanoclusters are suitable candidates for gas sensor applications because of their ... -
Physical, microstructural and mechanical study of isochronal annealing of deformed commercial iron
( Elsevier Ltd , 2016 , Article)Isochronal annealing of deformed commercial iron samples (99.88 m.-% Fe) after cold deformation is studied by means of Vickers microhardness and physical techniques based on positron annihilation (positron annihilation ... -
Dimensional regularization of the spatial wave function for a singular contact interaction in the relativistic schrodinger equation
( Institute of Physics Publishing , 2016 , Conference Paper)Based on our previous work in PRD 89, 125023 (2014), we stress here (for the first time) the regularization of the spatial wave function for the δ-contact interaction within the relativistic Schrodinger equation. The ... -
Effects of ambient climate and three warming treatments on fruit production in an alpine, subarctic meadow community
( Wiley , 2021 , Article)Premise Climate change is having major impacts on alpine and arctic regions, and inter‐annual variations in temperature are likely to increase. How increased climate variability will impact plant reproduction is ... -
Characteristics-based model predictive control of selective catalytic reduction in diesel-powered vehicles
( Elsevier Ltd , 2016 , Article)In heavy-duty diesel exhaust systems, selective catalytic reduction (SCR) is used to reduce NOx to nitrogen to meet environmental regulations. Diesel exhaust after-treatment involves a set of components that are best ... -
Inference for multiple linear regression model with extended skew normal errors
( ISOSS PUBLICATIONS , 2016 , Article)This paper presents the estimation of the parameters of the multiple linear regression model when errors are assumed to follow the independent extended skew normal distribution. The estimators of the regression parameters ... -
Asymptotic behaviour of contraction non-autonomous semi-flows in a Banach space: Application to first-order hyperbolic PDEs
( Elsevier Ltd , 2016 , Conference Paper)The asymptotic behaviour is studied for a class of non-autonomous infinite-dimensional non-linear dissipative systems. This is achieved by using the concept of contraction semi-flow, which is a generalization of contraction ... -
A new LQP alternating direction method for solving variational inequality problems with separable structure
( Taylor and Francis Ltd. , 2016 , Article)We presented a new logarithmic-quadratic proximal alternating direction scheme for the separable constrained convex programming problem. The predictor is obtained by solving series of related systems of non-linear equations ... -
Mass problems and density
( World Scientific Publishing Co. Pte Ltd , 2016 , Article)Recall that Ew is the lattice of Muchnik degrees of nonempty effectively compact sets in Euclidean space. We solve a long-standing open problem by proving that Ew is dense, i.e. satisfies {equation presented}. Our proof ... -
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 ... -
Structural evaluation, preliminary in vitro stability and electrochemical behavior of apatite coatings on Ti6Al4V substrates
( Elsevier Ltd , 2016 , Article)Medical-grade alloys, such as Ti-6Al-4V, have been used for fixation of fractured bone and for the total replacement of defective bone. Their bioactivity could be improved by applying a bone-like apatite layer onto their ... -
Invariants of third‐order ordinary differential equations y′′′=f(x,y,y′,y′′) via point transformations
( John Wiley and Sons Ltd , 2016 , Article)A new systematic method to find the relative invariant differentiation operators is developed. We incorporate this new approach with Lie's infinitesimal method to study the general class y′′′ = f(x, y, y′, y′′) under general ... -
Dark solitons near potential and nonlinearity steps
( American Physical Society , 2016 , Article)We study dark solitons near potential and nonlinearity steps and combinations thereof, forming rectangular barriers. This setting is relevant to the contexts of atomic Bose-Einstein condensates (where such steps can be ... -
PbS/CdS heterojunction quantum dot solar cells
( Springer New York LLC , 2016 , Article)The present work investigates the effects of combination of lead sulfide PbS quantum dots and cadmium sulfide CdS nanoparticles (NPs), with n-type and p-type semiconductors, on the photovoltaic performance of heterojunction ... -
Assessing general education learning outcomes at Qatar University
( Emerald Group Publishing Ltd. , 2016 , Article)The purpose of this paper is to assess the effectiveness of a new general education program at Qatar University (QU) in achieving English writing and critical thinking outcomes. Design/methodology/approach Collegiate ...