Browsing Mathematics, Statistics & Physics by Title
Now showing items 125-144 of 689
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Characterization of regulatory sequences in alternative promoters of hypermethylated genes associated with tumor resistance to cisplatin
( Spandidos Publications , 2014 , Article)The development of cisplatin resistance in human cancers is controlled by multiple genes and leads to therapeutic failure. Hypermethylation of specific gene promoters is a key event in clinical resistance to cisplatin. ... -
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar’s experience
( International Society of Global Health , 2022 , Article)Background: The effective reproduction number, Rt, is a tool to track and understand epidemic dynamics. This investigation of Rt estimations was conducted to guide the national COVID-19 response in Qatar, from the onset ... -
Characterizing the transitioning epidemiology of herpes simplex virus type 1 in the USA: Model-based predictions
( BioMed Central Ltd. , 2019 , Article)Background: Herpes simplex virus type 1 (HSV-1) is a prevalent lifelong infection that appears to be undergoing an epidemiologic transition in the United States (US). Using an analytical approach, this study aimed to ... -
Chimera state in a two-dimensional network of coupled genetic oscillators
( Institute of Physics Publishing , 2019 , Article)Due to the interaction of the cells, cellular communications are carried out with emergent collective behaviors, such as synchronization. In this paper, a network of coupled genetic oscillators is studied by considering a ... -
Chimera states in a multi-weighted neuronal network
( Elsevier , 2022 , Article)There are multiple types of interactions among neurons, each of which has a remarkable effect on the neurons' behavior. Due to the significance of chimeras in neural processes, in this paper, we study the impact of different ... -
Classification of the Lie and Noether point symmetries for the Wave and the Klein–Gordon equations in pp-wave spacetimes
( Elsevier B.V. , 2018 , Article)A complete classification of the Lie and Noether point symmetries for the Klein–Gordon and the wave equation in pp-wave spacetimes is obtained. The classification analysis is carried out by reducing the problem of the ... -
Closed form solution of nonlinear oscillation of a cantilever beam using λ-symmetry linearization criteria
( Elsevier , 2022 , Article)A mechanical system, in general, undergoes vibrational motion when the system is subjected to a tension or an external force. One of the examples of such a system is a cantilever beam when it is exposed to a bending action. ... -
CO, CO2, and SO2 detection based on functionalized graphene nanoribbons: First principles study
( Elsevier , 2020 , Article)In this study, density functional theory (DFT) has been used to build armchair graphene nanoribbon (AGNR) gas sensor and study its capacity to detect carbon monoxide (CO), carbon dioxide (CO2), and sulfur dioxide (SO2) ... -
Co-doped zigzag graphene nanoribbon based gas sensor for sensitive detection of H2S: DFT study
( Academic Press , 2021 , Article)In this work, we present a highly sensitive gas sensor for the detection of poisonous hydrogen sulfide gas (H2S) based on copper and zinc co-doped zigzag graphene nanoribbon (Cu/Zn-ZGNR). The electronic properties as well ... -
Collapse dynamics for the discrete nonlinear Schrödinger equation with gain and loss
( Elsevier B.V. , 2019 , Article)We discuss the finite-time collapse, also referred as blow-up, of the solutions of a discrete nonlinear Schrödinger (DNLS) equation incorporating linear and nonlinear gain and loss. Such an extended DNLS system appears in ... -
Combined theoretical and experimental study of the transmission of tilted ion beams through macroscopic conical glass capillaries
( IOP Publishing , 2015 , Conference Paper)The transmission as a function of the tilt angle of a 3 keV Ar+ ion beam through a conical macroscopic glass capillary is studied theoretically and experimentally. It was found that the charge patches which are responsible ... -
Common Fixed Point Results of Set Valued Maps for Aφ-Contraction and Generalized ϕ-Type Weak Contraction
( MDPI AG , 2019 , Article)The solutions for many real life problems may be obtained by interpreting the given problem mathematically in the form f(x)=x . One such example is that of the famous Borsuk–Ulam theorem in which, using some fixed point ... -
Common fixed point theorems for two pairs of self-mappings in partial metric space using C-class functions on (ψ, ϕ)-contractive condition
( International Scientific Research Publications , 2018 , Article)The purpose of this paper is to introduce common fixed point results for two pairs of weakly compatible self-mappings in partial metric space using C-class functions on (ψ, ϕ)-contractive condition. Example and application ... -
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 ... -
Complete allocation sampling: An efficient and easily implemented adaptive sampling design
( Wiley , 2010 , Article)Adaptive sampling designs are becoming increasingly popular in environmental science, particularly for surveying rare and aggregated populations. An adaptive sample is one in which the survey design is modified, or adapted, ... -
Complex-impedance response of an Ag/TeO2-V2O5/Ag structure
( Elsevier , 2009 , Article)The ac conductivity of glass samples of composition 50 mol% TeO2 and 50 mol% V2O5 has been analyzed. The samples were prepared by the usual melt-quench method. The electrical conductance and capacitance were measured over ... -
Compositional transformations in ion implanted polymers
( Elsevier , 2005 , Conference Paper)Changes of surface layer composition produced by ion bombardment of polyethylene and polypropylene samples were studied. These materials are under consideration for load bearing surfaces in biological and technical ... -
Comprehensive investigation of Er2O3 thin films grown with different ALD approaches
( Elsevier , 2022 , Article)The effect of Er precursor nature (Er(CpMe)3 or Er(tmhd)3) and annealing treatment at 500–1100 °C on the structural and optical properties of Er2O3 films grown on Si substrates by thermal or O2-plasma-assisted atomic layer ... -
Computation of conformal invariants
( Elsevier , 2020 , Article)We study numerical computation of conformal invariants of domains in the complex plane. In particular, we provide an algorithm for computing the conformal capacity of a condenser. The algorithm applies to a wide variety ... -
Computational Analysis for Bioconvection of Microorganisms in Prandtl Nanofluid Darcy-Forchheimer Flow across an Inclined Sheet
( MDPI , 2022 , Article)The two-dimensional boundary layer flow of a Prandtl nanofluid was explored in the presence of an aligned magnetic field over an inclined stretching/shrinking sheet in a non-Darcy permeable medium. To transform the PDEs ...