Journal of Basrah Researches (Sciences)

In this paper a numerical study of a nonlinear Fabry- Perot cavity filled with a self- elf
focusing are solved numerically using finite differences method with iterative approach. The results
are in agreement with experimental data available by other workers.

I n the present work, the mechanical behaviour of (LDPE-463) reinforced with Shrimp Shells
(Metapenaeusaffinis) composite, as a function filler contact (5, 10, 15, 20, 25, wt %). Filler
concentration has an obvious effect on improving several mechanical parameters. The parameters
studied are young’s modules, stress at break, and stress at yield which were increased with increasing
filler concentration. Elongation as indirect results of stress at break was decreased with increasing
filler concentration. It was found that the addition of Shrimp Shells to the LDPE leads to decreases
impact strength. Results were analyzed in the frame of drawing model.

T his paper was devoted to the enrichment of (34SF6) following the irradiation of the mixture of
gases which consist (0.05 SF6 +0.95Ar) in molecular beam system. Enrichment factors as a function of
different lines of TEA CO2 laser were studied, and the best line of irradiation was 10 P (16). Also the
relation of stagnation pressures (corresponding of the adiabatic expansion temperatures) with the same
factors at 10p (16) and 10p (20) were studied.

In this paper went to prove which correct facing and reach to the optimum orientation of solar
panel, from this research we know the best facing installation of Baghdad city by using five facing in
installation solar panel ( east , south-east , south ,south-west and west )the results for the optimum
power for solar panel are obtaining relatively differ for each face and we are found that the face of
south are best for fixed panel.

This paper reports the results of a numerical study of a new Lorenz like model using number of
indicators (time series, attractors, Lyapunov exponents and bifurcation diagrams) that the system is
able to show most of the usual behavior of the original Lorenz system.

Thin film of a dye(p-Naphtholbenzein(???? ))was prepared by spin-coating technique on
glass.The optical properties of the P-Naphtholbenzein(???? )(with thickness 4????m)were investigated at
room temperature and they include absorbance/transmittance/reflectance, spectra, absorption
coefficient ,extinction coefficient ,optical conductivity and complex dielectric constant.The data of
absorption coefficient indicated for direct transition with direct energy gap (Eg ).We have also studied
Ubrach energy (????E)and the ratio of carrier concentration to the effective mass ( N/m* ) .

The ZnO thin films were prepared by chemical bath deposition technique using glass
substrates with bath temperature 80oC and annealing temperatures 300oC, 350oC and 400oC. The Xray
diffraction analysis shows that the prepared samples are polycrystalline and it exhibits hexagonal
structure along with c-axis orientation. The average grain size of ZnO thin films was found to be
36.340nm as calculated by XRD using Debye Scherer’s formula. After annealing the films in air the
grain size was 32.420nm, 60.993nm and 34.067nm respectively. The optical absorbance of the
deposited films was characterized by UV-VIS-NIR spectrometry and shows the presence of direct
transition with band gap energy 3.32eV and after annealing, it decreases to 3.12eV, 3.04eV and
3.10eV respectively.

Tin Sulfide thin films were prepared on glass substrate by spray pyrolysis technique .X-ray
diffraction confirmed the polycrystalline SnS phase with preferential orientation along (111) plane
.The effect of substrate temperature on structural and optical properties was studied. The optical direct
allowed band gap was varied in the range (1.6- 1.54)eV as substrate temperature increases which may
be attributed to the increase in the grain size and then decrease in the strain .

In this paper, variational iteration method (VIM) and homotopy perturbation method (HPM) are
implemented to solve extraordinary differential equation. The comparison between VIM and HPM
with Adomian decomposition method (ADM) shows that VIM and HPM are more effective and
convenient to use and overcomes the difficulty arising in calculating Adomian polynomials

In this paper we are concerned with the construction of an artificial intelligence program as a
neurocontroller for safely driving a car in the road with different probable situations. This
research mainly interested in the use of neural network (NN) and its work with radars. The
proposed approach deals with decision-making mechanisms depending on the target position.
The main novelty in this paper lies in the NN controlling depending on the front and back radars
readings. This neurocontroller decides car status to increase or decrease acceleration, and turning
direction with steering angle to the left or the right while accelerating. Results showed the good
capability of this controller with emphasis on skills learning behavior