ISSN: 1817-2695

Volume 37, Issue 3

Volume 37, Issue 3, Summer 2011, Page 1-81


Mechanical behaviour of Low Density Polyethylene / Shrimp Shells Composite.

Abdulwahab A.Sultan and Qusay A. Matoq; Abdullah A. Hussein

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 5-11

In 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.

Sulfur isotopes separation by using the molecular beam system

and Sahib .N.Abdul-Wahid; Haider Y.Hammood

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 12-15

This 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.

Optimum Orientation of Solar Panels in Baghdad city

Emad Jaleel Mahdi; sahib Nama Abdul-Wahid; Sarmad ShakerAbdulstar

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 16-22

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.

THE STUDY OF A NEW LORENZ-LIKE MODEL

Alaa M. Al-Roumy

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 23-35

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.

Water absorption and mechanical properties of high – density polyethylene/ egg shell composite

Rusel D. Salim and Abdulwahab A. Sultan; Abdullah A. Hussein

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 36-42

In this research, the water absorption and mechanical properties of (high-density polyethylene /egg shell) composites as a function of egg shell powder weight content in the grain size (75,125 μm) were investigated. Polymer composite was fabricated by mixing (HDPE) with (5, 10, 15, 20, 25) wt.% of egg shell powder to obtain desirable properties. The parameters such as tensile strength, tensile modulus, elongation at break and impact test were carried out on the prepared samples. It was found that the addition of egg shell powder to the polymer leads to decrease the tensile strength, modulus of elasticity, shore-D hardness on other hand it increases the % elongation at break, and for the impact strength. Water absorption of the composites behaviours as function of days has also been investigated, and it increases by increasing exposure time for the same filler content, while the absorbed amount of water increases, by increasing the wt.% of egg shell constant exposure time.

Optical Properties Of Dye(P- Naphtholbenzein( ) )

Abdulameer Imran Al-Mansaf

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 43-48

Thin film of a dye(p-Naphtholbenzein( ))was prepared by spin-coating technique on glass.The optical properties of the P-Naphtholbenzein( )(with thickness )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 and the ratio of carrier concentration to the effective mass ( N/m* ) .

Characterization of ZnO thin films grown by chemical bath deposition

Mohammad M. Ali

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 49-56

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 X-ray 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.

The Effect Of Substrate Temperature On The Optical and Structural Properties Of Tin Sulfide Thin Films

L. A.Latif; S.M.Ahmed; A.KH.Salim

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 57-63

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 .

Solution of an Extraordinary differential equation by variational iteration method and homotopy perturbation method

Elaf Jaafar Ali and Abeer Majeed Jassim

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 64-72

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.

Neurocontrol Car Driving by Assistance Of Radar Networks System

Safa A. Najim Alsalahi and; Hayder Q. Mashri

Journal of Basrah Researches (Sciences), Volume 37, Issue 3, Pages 73-81

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.