Results 81 to 90 of about 1,538,775 (233)

Stochastic perturbation of the Lighthill–Whitham–Richards model via the method of stochastic characteristics

open access: yesJournal of Mathematics in Industry, 2021
In this paper we apply the method of stochastic characteristics to a Lighthill–Whitham–Richards model. The stochastic perturbation can be seen as errors in measurement of the traffic density.
Nora Müller, Wolfgang Bock
doaj   +1 more source

Nonergodic subdiffusion from Brownian motion in an inhomogeneous medium. [PDF]

open access: yesPhysical Review Letters, 2014
Nonergodicity observed in single-particle tracking experiments is usually modeled by transient trapping rather than spatial disorder. We introduce models of a particle diffusing in a medium consisting of regions with random sizes and random diffusivities.
P. Massignan   +5 more
semanticscholar   +1 more source

Haloarchaea swim slowly for optimal chemotactic efficiency in low nutrient environments

open access: yesNature Communications, 2020
Brownian motion places the ultimate limit on microorganisms’ ability to navigate. Thornton et al. show that Haloarchaea have a strategy of slow swimming and infrequent reorientation that exploits the randomising nature of Brownian motion to achieve ...
Katie L. Thornton   +4 more
doaj   +1 more source

Karhunen-Loève Expansion for the Second Order Detrended Brownian Motion

open access: yesAbstract and Applied Analysis, 2014
Based on the norm in the Hilbert Space L2[0,1], the second order detrended Brownian motion is defined as the orthogonal component of projection of the standard Brownian motion into the space spanned by nonlinear function subspace.
Yongchun Zhou   +3 more
doaj   +1 more source

Hydrothermal analysis of magneto hydrodynamic nanofluid flow between two parallel by AGM

open access: yesCase Studies in Thermal Engineering, 2019
In this paper, heat and mass transfer process of steady nanofluid flow between two parallel plates is investigated in existence of uniform magnetic field.
R. Derakhshan   +4 more
doaj  

Physical Brownian motion in a magnetic field as a rough path

open access: yesTransactions of the American Mathematical Society, 2015
The indefinite integral of the homogenized Ornstein-Uhlenbeck process is a well-known model for physical Brownian motion, modelling the behaviour of an object subject to random impulses [L. S. Ornstein, G. E.
P. Friz, Paul Gassiat, Terry Lyons
semanticscholar   +1 more source

Flow and Heat Transfer to Sisko Nanofluid over a Nonlinear Stretching Sheet.

open access: yesPLoS ONE, 2015
The two-dimensional boundary layer flow and heat transfer to Sisko nanofluid over a non-linearly stretching sheet is scrutinized in the concerned study. Our nanofluid model incorporates the influences of the thermophoresis and Brownian motion.
Masood Khan   +3 more
doaj   +1 more source

Thermo diffusion and diffusion thermo impacts on bioconvection Walter-B nanomaterial involving gyrotactic microorganisms

open access: yesAlexandria Engineering Journal, 2021
Here magnetohydrodynamic (MHD) bioconvection Walter-B nanofluid flow due to stretched sheet is considered. Significance of motile gyrotactic microorganisms and melting phenomena are scrutinized.
T. Hayat   +3 more
doaj  

Application of the Fractal Brownian Motion to the Athens Stock Exchange

open access: yesFractal and Fractional
The Athens Stock Exchange (ASE) is a dynamic financial market with complex interactions and inherent volatility. Traditional models often fall short in capturing the intricate dependencies and long memory effects observed in real-world financial data. In
John Leventides   +5 more
doaj   +1 more source

Detecting non-Brownian trait evolution in adaptive radiations.

open access: yesPLoS Biology, 2006
Many phylogenetic comparative methods that are currently widely used in the scientific literature assume a Brownian motion model for trait evolution, but the suitability of that model is rarely tested, and a number of important factors might affect ...
Robert P Freckleton, Paul H Harvey
doaj   +1 more source

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