Effect of Direct Injection on the Aerodynamics Characteristics of Wing Airfoil with Backward Facing Step
Effect of Direct Injection on the Aerodynamics Characteristics of Wing Airfoil with Backward Facing Step

Mohammed Idris. Abu-Batikh; Abdul-Karim Abbas. Khudair; Ihsan Zidan. Salem

Volume 27, Issue 9 , June 2009, Page 288-301

https://doi.org/10.30684/etj.27.9.19

Abstract
  Experimental and theoretical investigations were performed to study the effect of direct injection of air on aerodynamic characteristics for airfoil with backward facing full step. ...  Read More ...
Study of temperature and ultraviolet radiation effect on the values of thermal conductivity of hybrid composite materials
Study of temperature and ultraviolet radiation effect on the values of thermal conductivity of hybrid composite materials

Ali Hassan. Rasan Hathal; Balqis Mohammed Dhiaa Al-dabagh

Volume 27, Issue 9 , June 2009, Page 302-309

https://doi.org/10.30684/etj.27.9.20

Abstract
  In this research work a hybrid composite material was prepared contains a matrix which is Epoxy resin (EP) natural and fabricated fibers (Kevler fiber + Woven and short glass fiber ...  Read More ...
Laboratory Investigation on Efficiency of Model Stone Column Groups
Laboratory Investigation on Efficiency of Model Stone Column Groups

Kais T. Shlash; Mohammed Y. Fattah; Maki J. Mohammed Al-Waily

Volume 27, Issue 9 , June 2009, Page 1673-1690

https://doi.org/10.30684/etj.27.9.1

Abstract
  As in piles, the efficiency of a group (Eg) of stone columns is defined as the ratiobetween the capacity of the group to the capacity of each stone column in the groupmultiplied by ...  Read More ...
Load Line Direction and Bearing Length Effects on The Tilting 4-Pad Bearing Performance
Load Line Direction and Bearing Length Effects on The Tilting 4-Pad Bearing Performance

Raad Hameed Majed

Volume 27, Issue 9 , June 2009, Page 1691-1700

https://doi.org/10.30684/etj.27.9.2

Abstract
  This paper presents the tilting 4-pad bearing performance under dynamicload, the journal center velocity is calculated by mobility method. Finite element methodwas used to solve the ...  Read More ...
Preparation and Study of Electrical Characteristics of (n-CdS/p-Ge) Thin-Film Heterojunction
Preparation and Study of Electrical Characteristics of (n-CdS/p-Ge) Thin-Film Heterojunction

Ahmed Shukur Hameed

Volume 27, Issue 9 , June 2009, Page 1701-1710

https://doi.org/10.30684/etj.27.9.3

Abstract
  A thin film (400±5 nm) of Germanium was deposited on the slide glass, thenanother thin film (200±3 nm) of Cadmium Sulphide directly deposited on the Ge thinfilm, with ...  Read More ...
Using of Steel Slag in Modification of Concrete Properties
Using of Steel Slag in Modification of Concrete Properties

Khidhair J. Mohammed; Mohammed O.Abbas; Falak O.Abbas

Volume 27, Issue 9 , June 2009, Page 1711-1720

https://doi.org/10.30684/etj.27.9.4

Abstract
  Steel slag which can be considered as solid waste pollutant was used in concrete mixture for road bases and surfaces, bridges, asphaltic concrete, clinker raw material and other fields, ...  Read More ...
A Hydrodynamic Model For Simulation Of Unsteady Flow In Storm Sewer Network Systems
A Hydrodynamic Model For Simulation Of Unsteady Flow In Storm Sewer Network Systems

Jasim M.Ridha; Jaafar S.Maatoq; Karim K. El-Jumaily

Volume 27, Issue 9 , June 2009, Page 1721-1735

https://doi.org/10.30684/etj.27.9.5

Abstract
  In this work, a hydrodynamic numerical model for sewer networks has beendeveloped, Unsteady flow in either tree-type or looped sewer networks systems has been simulated, The Prissmann ...  Read More ...
Evaluation of Tigris River Quality in Baghdad for the period between (November 2005- October2006)
Evaluation of Tigris River Quality in Baghdad for the period between (November 2005- October2006)

Ayat Hussein Al-Obaidi

Volume 27, Issue 9 , June 2009, Page 1736-1745

https://doi.org/10.30684/etj.27.9.6

Abstract
  After war and due to the bad conditions into most services in the country (includingwater supply).It is decide to study some of important characteristics of Tigris River especiallywhen ...  Read More ...
High Resolution Direction-of-Arrival Estimation Using Genetic Algorithm
High Resolution Direction-of-Arrival Estimation Using Genetic Algorithm

Eyad I. Abbas; Ali Abdul-Elah Noori

Volume 27, Issue 9 , June 2009, Page 1746-1754

https://doi.org/10.30684/etj.27.9.7

Abstract
  This paper presents an application of a performance analysis of a genetic algorithm GA developed for extraction of the directions of arrival DOA of several signals impinging on uniform ...  Read More ...
Wavelet and Wavelet Packet Analysis For Image Denoising
Wavelet and Wavelet Packet Analysis For Image Denoising

Aymen Dawood Salman

Volume 27, Issue 9 , June 2009, Page 1755-1765

https://doi.org/10.30684/etj.27.9.8

Abstract
  The denoising method based on wavelet or wavelet packet is used widely for image denoising. It is one of the most popular methods that depends on thresholding the wavelet coefficients ...  Read More ...
Effect of Crude Oil-Water Two-Phase Flow on Pump Performance
Effect of Crude Oil-Water Two-Phase Flow on Pump Performance

Banipal N. Yaqob; Ihsan F. Abbas

Volume 27, Issue 9 , June 2009, Page 1766-1774

https://doi.org/10.30684/etj.27.9.9

Abstract
  An experimental study of pump performance (i.e. head, discharge, power, etc.) was achieved by using a centrifugal pump with crude oil-water two-phase flow. The crude oil used was from ...  Read More ...
3-D Virtual Maps Production for Mosul City by USING GIS Techniques
3-D Virtual Maps Production for Mosul City by USING GIS Techniques

Abdul Razzak T.Ziboon; Amjed Naser Mohsin

Volume 27, Issue 9 , June 2009, Page 1775-1789

https://doi.org/10.30684/etj.27.9.10

Abstract
  With the developments in digital image processing techniques, 3D models of objects are transferred to the digital form from the hardcopy form. 3D visualization was performed by using ...  Read More ...
Experimental Study on A Hybrid Adsorption Refrigeration System
Experimental Study on A Hybrid Adsorption Refrigeration System

Abdul Hadi Nema K; Hassan Jawdat Fadiel

Volume 27, Issue 9 , June 2009, Page 1790-1800

https://doi.org/10.30684/etj.27.9.11

Abstract
  One of the most new methods of solar applications are the adsorption refrigeration methods, which can be powered by solar energy or waste heat. A hybrid adsorption refrigeration unit ...  Read More ...
Effect of Temperature Tuning on Diode Laser Performance
Effect of Temperature Tuning on Diode Laser Performance

Zainab T. Hussain; Adawiya J. Haider

Volume 27, Issue 9 , June 2009, Page 1801-1810

https://doi.org/10.30684/etj.27.9.12

Abstract
  In this work, an expermental study on wavelength tunning for diode laser adopting temperature behavior varition process is carried out .Temperature effect on the characteristics of ...  Read More ...
Artificial Neural Networks Analysis of Treatment Process of Gypseous Soils
Artificial Neural Networks Analysis of Treatment Process of Gypseous Soils

Mohammad M. Al-Ani; Mohammad Y. Fattah; Mahmoud T. A. Al-Lamy

Volume 27, Issue 9 , June 2009, Page 1811-1832

https://doi.org/10.30684/etj.27.9.13

Abstract
  Artificial Neural Networks (ANNs) are used to relate the properties of gypseous soilsand evaluate the values of compression of soils under different conditions. Therefore, onelayerperception ...  Read More ...
Theoretical Analyses of the Dynamic Behaviour of Composite Cantilever Beam Manufactured From E-glass Polyester
Theoretical Analyses of the Dynamic Behaviour of Composite Cantilever Beam Manufactured From E-glass Polyester

Hayder Moasa Al-Shukri; Muhannad Z. Khelifa; Saad A. Khether

Volume 27, Issue 9 , June 2009, Page 1833-1846

https://doi.org/10.30684/etj.27.9.14

Abstract
  In order to have the right combination of manufactured E-glass polyestercomposite properties and in service performance, the dynamic behaviour is one of the important properties to ...  Read More ...
Two Stage Kalman Estimators with Probabilistically Weighted Average
Two Stage Kalman Estimators with Probabilistically Weighted Average

Hanady Abbas Jaber

Volume 27, Issue 9 , June 2009, Page 1847-1857

https://doi.org/10.30684/etj.27.9.15

Abstract
  With spherical coordinate, the adaptive estimation using multiple model filtering isenhanced in this paper. The enhancement is achieved by using just two depended parallelKalman filters, ...  Read More ...
Contribution ofWing, Vertical Tail and Fuselage on Airplane Stability with Failed Outboard Engine
Contribution ofWing, Vertical Tail and Fuselage on Airplane Stability with Failed Outboard Engine

Mohamed A. R.Yass; Naseer H. Farhood; Raed Abbas Jessam

Volume 27, Issue 9 , June 2009, Page 1858-1871

https://doi.org/10.30684/etj.27.9.16

Abstract
  The Effect of wing, vertical tail, and fuselage design parameters on airplane stabilitywith failed outboard engine presents in this study. Boeing (747-400) have been selectedfor available ...  Read More ...
Characteristics of Coupling Degradation Tolerances for Single-Mode Optical Fiber
Characteristics of Coupling Degradation Tolerances for Single-Mode Optical Fiber

Ali H. Al-Hamdani; Abdulla Khudiar Abass; Mohammad Abdul-Sattar Salih

Volume 27, Issue 9 , June 2009, Page 1872-1879

https://doi.org/10.30684/etj.27.9.17

Abstract
  The coupling tolerances is considered as an important parameters for the opticaldesigner and it can not be ignored. Since the coupling efficiency is affected by thedisplacement of the ...  Read More ...
Synthesis and study of the Novel tetradented ligand type N2O2 and its complexes with (Mn(II),Co (II),Ni (II) and Cu(II)) ions
Synthesis and study of the Novel tetradented ligand type N2O2 and its complexes with (Mn(II),Co (II),Ni (II) and Cu(II)) ions

Ahmad Thabet Numan; Maysoon T.Tawfiq; Basima Abdul Hussin Zaidan

Volume 27, Issue 9 , June 2009, Page 1880-1890

https://doi.org/10.30684/etj.27.9.18

Abstract
  A new Schiff base ligand Bis-1,4-di[N-3-(2-hydroxy-1-amino)- acetophenonylidene] benzylidene [L] and its complexes with (Mn(II),Co(II),Ni(II and Cu(II)) were synthesized . The ligand ...  Read More ...