This paper presents the characterization of sea wave behavior in some areas of Lattakia
shore, through monitoring for more than one site different from each other by terrain,
water depth and bottom type (sand, rocks).
It also presents results of m
easurements of wave height values and their period at
breakwater area of Lattakia port, and also shows results of power calculations trans- mitted
with waves and speed of those waves, and brings a comparison of energy values calculated
using different experimental equations is being used globally, and shows that wave's speed
and period are independent from each other.
Also shows that it is possible to apply wave power techniques in Syria ,relying on principle
of high strength and low height , best way to achieve this is through hydraulic circuits ,and
installation of a central system and several subsystems connected to it ,this provides a
continuous flow of power.
This paper deals with a numerical method based on the simulation of a 2D tank, for
unsteady and laminar two - dimensional incompressible viscous flow. Navier-Stokes and
Continuity equations are solved in a fluid domain. These equations are discreti
zed by
Finite Differences Method. The pressure is obtained by solving a Poisson equation dealing
with a fictitious velocity field. The Poisson equation is solved by a Finite Volume Method.
The grid is refined by a new method “Adaptive Selective Mesh Refinement” called
“ASMR”.
In this work, we have been found explicit exact soliton wave solutions for Zeldovich
equation with time-dependent coefficients, by using the tanh function method with
nonlinear wave transform, in general case. The results obtained shows that these
exact
solutions are affected the nonlinear nature of the wave variable, it is also shown that this
method is effective and appropriate for solving this kind of nonlinear PDEs, which are
models of many applied problems in physics, chemistry and population evolution.
The main objective of the study is to select the best technique for lithotripsy of distal
ureteral stones .This study included 082 patients of distal ureteral stone at Al-Assad
University Hospital and Tishreen University Hospital in Latakia between
2016 and 2017.
64 patients who underwent ureteroscopic holmium laser lithotripsy and 216 patient who
underwent ESWL.The ages ranged from 19-72Years, The median age was approximately
37 year.
the success rate of distal ureteral lithotripsy using uretroscope-laser was 97% (100%
with stones> 1 cm, and 95% with stones< 1 cm) while it was 72% with the extracorporeal
lithotripsy(84% with stones > 1 cm, and 36% with stones < 1 cm).
The best results in treating the distal uretral stones were achieved by the use of
ureteroscope and laser lithotripsy, regardless of the stone size. While the extracorporeal
lithotripsy the best results was only with stones< 1 cm.
The theory of quantum liquids (quantum liquid theory) in the last few Years largely
developed because of the brood spectrum of natural phenomenon relating to the limitation
of parameters of the this (the parameters of the Landau Fermi liquid theory
). We aim
through this paper to resolve kinetic equation for the spin density. After adding Rashba
term of spin-orbit coupling that belong to Landau parameters of orders ( 0,1). Also
calculated the magnetic susceptibility also taking into account the mutual influence
function,wich we have greeted from the collective perturbation energy. The propagation in
quantum liquids by calculation(wave modes) at zeros complex function of magnetic
susceptibility.
Using the transport kinetic equation for spin density in thin film as 2D Fermi
liquid, the dynamic spin susceptibility is calculated in terms of the Landau
parameters a for thin film. The formula allows to estimate the dispersion relation
of susc
eptibility with arbitrary up to quadric term in wave vector 2 k . The
possibility of experimental determine of Landau's parameters with higher is
discussed and compared with others in this field.
Recently PGB (photonic band gap) filters show a great
development. Here we will present two different PGB filters with
lattice etched in the ground plane. The rejection band characteristic
is function of the number and shape of elements etched. Th
ese
filters are modelling by the FWCIP method.
In this article, we propose a powerful method called
homotopy perturbation method (HPM) for obtaining the
analytical solutions for an non-linear system of partial
differential equations. We begin this article by apply HPM
method for an important models of linear and non-linear
partial differential equations.
In this research, it has been studied the Fermi-Liquid density wave depending on
Landau theory. The kinetic equation has been solved using relaxation time approximation
at collision less condition. This is by expanding particle density function of
order Plus, Zero sound modes have been calculated and attenuation rate at low
temperatures.The results have been discussed and compared to the set ones and
the offered theory in this domain.
We aim in this research to study the existence and uniqueness of strong solution for
initial-boundary values problem for a semi-linear wave equation with the nonlinear
boundary dissipation, by transforming it to a Cauchy problem with second order operator
differential equations in Hilbert space. Therefore, we transform it, using Green's formula
for a triple of Hilbert spaces.
