Mechanisms to explain the reverse perivascular transport of solutes out of the brain

One of the most well-known bio-inspired algorithms used in optimization problems is the particle swarm optimization (PSO), which basically consists on a machine-learning technique loosely inspired by birds flocking in search of food More specifically, it consists of a number of particles that collectively move on the search space in search of the global optimum The Darwinian particle swarm optimization (DPSO) is an evolutionary algorithm that extends the PSO using natural selection, or survival of the fittest, to enhance the ability to escape from local optima This paper firstly presents a survey on PSO algorithms mainly focusing on the DPSO Afterward, a method for controlling the convergence rate of the DPSO using fractional calculus (FC) concepts is proposed The fractional-order optimization algorithm, denoted as FO-DPSO, is tested using several well-known functions, and the relationship between the fractional-order velocity and the convergence of the algorithm is observed Moreover, experimental results show that the FO-DPSO significantly outperforms the previously presented FO-PSO

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Introducing the fractional-order Darwinian PSO

Unsteady response of non-Newtonian blood flow through a stenosed artery in magnetic field

Electro-magneto-hydrodynamic peristaltic pumping of couple stress biofluids through a complex wavy micro-channel

We have examined the peristaltic flow of Carreau fluid in a rectangular channel through a porous medium. The governing equations of motion are simplified by applying the long wavelength and low Reynolds number approximations. The reduced highly nonlinear partial differential equations are solved jointly by homotopy perturbation and Eigen function expansion methods. The expression for pressure rise is computed numerically by evaluating the numerical integration. The physical features of pertinent parameters have been discussed by plotting graphs of velocity, pressure rise, pressure gradient, and stream functions.

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Peristaltic Flow of Carreau Fluid in a Rectangular Duct through a Porous Medium

Magnetohydrodynamic (MHD) flow of blood has been studied under the influ- ence of body acceleration. With the help of Laplace and finite Hankel transforms, an exact solution is obtained for the unsteady flow of blood as an electrical conducting, incompress- ible and elastico-viscous fluid in the presence of a magnetic field acting along the radius of the pipe. Analytical expressions for axial velocity, fluid acceleration and flow rate has been obtained.

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MHD flow of an elastico-viscous fluid under periodic body acceleration

Pulsatile flow of blood through a porous medium has been studied studied underthe influence of body acceleration. With the help of Laplace and finite Hankeltransforms, analytic expressions for axial velocity, fluid acceleration, flow rate,and shear stress have been obtained.

N. A. S. Afifi

Papers

MHD flow of an elastico-viscous fluid under periodic body acceleration

Pulsatile Flow of Blood through a Porous Mediumunder Periodic Body Acceleration

Interaction of peristaltic flow with pulsatile fluid through a porous medium

On the solution of the endolymph equation using fractional calculus

An exact solution of the endolymph equation