استخدام مبدأ سرعة التبديد الاقصى للطاقه الحركيه في نظرية التصادم
استخدام مبدأ سرعة التبديد الاقصى للطاقه الحركيه في نظرية التصادم
Volume 25, Issue 2 , April 2007, Page 23-33

https://doi.org/10.30684/etj.25.2.1

Abstract
  In this study a dynamic model has been developed for two legs walking machinefor analysing the impact process. Energy dissipation in impact process due to legcontact with the surface ...  Read More ...
تاثير الغبار المتطايرمن معمل سمنت الكوفة على البيئة المحيطة
تاثير الغبار المتطايرمن معمل سمنت الكوفة على البيئة المحيطة
Volume 25, Issue 2 , April 2007, Page 34-43

https://doi.org/10.30684/etj.25.2.10

Abstract
  In this study ,analysis of dust and gas from Al-Kufa cement factory are made.The effect on the enevironmantal polloution on the town near the factory wasoutlined.The study deals the ...  Read More ...
Production Composite Materials by Fused DepositionMethod
Production Composite Materials by Fused DepositionMethod
Volume 25, Issue 2 , April 2007, Page 44-60

https://doi.org/10.30684/etj.25.2.11

Abstract
  The aim of this research is to produce composite materials with ceramic basecovered by a layer of (Al) and its alloys by means of fused deposition technique.This technique represents ...  Read More ...
Numerical and Experimental Study of Ice Storage in Air Conditioning Systems
Numerical and Experimental Study of Ice Storage in Air Conditioning Systems
Volume 25, Issue 2 , April 2007, Page 61-75

https://doi.org/10.30684/etj.25.2.12

Abstract
  An experimental and numerical study done to design and analysis ice storage inair conditioning system on building with three types of cooling load. The designsystem was active to produced ...  Read More ...
The Boundary Element Method Versus The Finite Element Method For Solving Two-Dimensional Continuum Problems
The Boundary Element Method Versus The Finite Element Method For Solving Two-Dimensional Continuum Problems

Omar al-Farouk S. al–Damluji; Mohammed Yousif Fattah

Volume 25, Issue 2 , April 2007, Page 132-152

https://doi.org/10.30684/etj.25.2.2

Abstract
  Stress analysis problems in geomechanics are ideally suited to the method of boundaryelements, as this technique usually requires a very small number of nodes bycomparison to finite ...  Read More ...
Surface matrix based Machining Planes Determination for Milling Process (Roughing Stage)
Surface matrix based Machining Planes Determination for Milling Process (Roughing Stage)

Laith A. Mohammed

Volume 25, Issue 2 , April 2007, Page 153-167

https://doi.org/10.30684/etj.25.2.3

Abstract
  This paper deals with machining plane determination process for CNC millingmachining. Three methods, Matrix, 3D contour matrix and flow line arepresented. All methods depend on the ...  Read More ...
Features of Spot-Matrix Surface Hardening of Low-Carbon Steel Using Pulsed Laser
Features of Spot-Matrix Surface Hardening of Low-Carbon Steel Using Pulsed Laser

Khawla S. Khashan

Volume 25, Issue 2 , April 2007, Page 168-175

https://doi.org/10.30684/etj.25.2.4

Abstract
  In this work, results of spot hardening in low-carbon steel by using a pulsedNd:YAG laser are presented. These results include determination ofhardening depth, diameter of hardened ...  Read More ...
Fabrication and Characterization of Cu2S /Si Heterojunction Photodetector Based on Spray Pyrolysis of Cu2S on Si
Fabrication and Characterization of Cu2S /Si Heterojunction Photodetector Based on Spray Pyrolysis of Cu2S on Si

Khaled Z. Yahiya; Yasmeen Z. Daood; Saria D. Ahmed

Volume 25, Issue 2 , April 2007, Page 176-182

https://doi.org/10.30684/etj.25.2.5

Abstract
  In the present work fabrication and characterization of Cu2S/Siheterojunction photodiodes made by spray pyrolysis method using aqueoussolution of CuCl2.2H2O onto n-type silicon substrates ...  Read More ...
The Effect of Initial Temperature on Burning Velocity of Hydrogen – Air Mixtures
The Effect of Initial Temperature on Burning Velocity of Hydrogen – Air Mixtures

M. N. Hamid; Arkan F. Said

Volume 25, Issue 2 , April 2007, Page 183-194

https://doi.org/10.30684/etj.25.2.6

Abstract
  In present work, the burning velocity of hydrogen-Air mixtures varies with hydrogen concentration and initial temperature of the unburned mixture. Laminar flame speed has been measured ...  Read More ...
Prediction of Delay at a Parking Garage Facility Using STARSIM Simulation Package
Prediction of Delay at a Parking Garage Facility Using STARSIM Simulation Package

Emad A. Ismail; Ali M. K. Al-Ubaidy

Volume 25, Issue 2 , April 2007, Page 195-209

https://doi.org/10.30684/etj.25.2.7

Abstract
  The main objective of the present paper is to predict the average delay values for delayed vehicles at the adjacent entrance and exit gates combination of a parking garage using a simulation ...  Read More ...
Nonlinear Finite Element Analysis of Reinforced Concrete Beams with Large Opening under Flexure
Nonlinear Finite Element Analysis of Reinforced Concrete Beams with Large Opening under Flexure

Ihsan A. S. Al-Shaarbaf; Nabil A-M. J. Al-Bayati

Volume 25, Issue 2 , April 2007, Page 210-228

https://doi.org/10.30684/etj.25.2.8

Abstract
  This paper describes a three- dimensional nonlinear finite element model suitable for the analysis of reinforced concrete Beams with Large Opening under Flexure. The 20-node isoparametric ...  Read More ...
Laplace Transformation for Determining The Linear Equivalence of The Periodic Sequence
Laplace Transformation for Determining The Linear Equivalence of The Periodic Sequence

Raghad Kadhim Salih

Volume 25, Issue 2 , April 2007, Page 229-241

https://doi.org/10.30684/etj.25.2.9

Abstract
  The research presents a proposed method with an algorithm written inMatlab language to determine the linear equivalence of the pseudo-randomperiodic sequences mathematically by using ...  Read More ...
Stiffness Matrix for Haunched Members With Including Effect of Transverse Shear Deformations
Stiffness Matrix for Haunched Members With Including Effect of Transverse Shear Deformations

Abbas Abdel-Majid Allawi

Volume 25, Issue 2 , April 2007, Page 242-252

https://doi.org/10.30684/etj.25.2.13

Abstract
  This study includes the derivation of the stiffness matrix for a haunchedmember using the simple bending theory. The derived stiffness matrix coversmost possible geometric shapes for ...  Read More ...
Effect of Ethanol Concentrations in Internal Coagulant on the Morphology and Separation Performance of Polyethersulfone (PES) Hollow Fiber UFMembranes Prepared by PES/Ethanol/NMP Solution
Effect of Ethanol Concentrations in Internal Coagulant on the Morphology and Separation Performance of Polyethersulfone (PES) Hollow Fiber UFMembranes Prepared by PES/Ethanol/NMP Solution

Qusay Fadhel Alsalhy

Volume 25, Issue 2 , April 2007, Page 253-265

https://doi.org/10.30684/etj.25.2.14

Abstract
  Polyethersulfone (PES) hollow fiber UF membranes were fabricated usingethanol (non-solvent) as additive and N-methyl-2-pyrrolidone (NMP) as asolvent. Asymmetric hollow fiber UF membranes ...  Read More ...
Effects of Mix Property On Time Dependent Behavior of Reinforced Concrete Slabs
Effects of Mix Property On Time Dependent Behavior of Reinforced Concrete Slabs

A. A. Abdul–Razzak; M. A. Al Jurmaa

Volume 25, Issue 2 , April 2007, Page 266-281

https://doi.org/10.30684/etj.25.2.15

Abstract
  A nonlinear, layered, finite element model for predicting the time dependentbehavior of reinforced concrete slabs under sustained transverse loading ispresented. The effects of biaxial ...  Read More ...
Characteristics of Bubbles and Gas Holdup In A Two-Phase Column For Different Liquid Phases
Characteristics of Bubbles and Gas Holdup In A Two-Phase Column For Different Liquid Phases

Auroba. Nafaa. Abdullah

Volume 25, Issue 2 , April 2007, Page 282-290

https://doi.org/10.30684/etj.25.2.16

Abstract
  Experimental study of gas holdup (Eg), bubble diameter (dvs) interfacial area(a) m-1, small bubble rise velocity (Ubs), and bubble rise velocity (Ubr) in (0.1mi.d) and (1.5m) high column ...  Read More ...
Study the Integro-Differential Equation in a Lorentzian Energy Spread Case
Study the Integro-Differential Equation in a Lorentzian Energy Spread Case

R. A. Khamis; H. M. Daoud; M. Z. Al-Faiz; M. I. Sanduk

Volume 25, Issue 2 , April 2007, Page 291-298

https://doi.org/10.30684/etj.25.2.17

Abstract
  The fundamentals of free electron laser (FEL) theory are now well–establishedand can provide a sophisticated description of experiments over a wide rangeof parameters. While new ...  Read More ...
3D Wavelet-Based Optical Flow Estimation
3D Wavelet-Based Optical Flow Estimation

Mutaz. S. AbdulWahab

Volume 25, Issue 2 , April 2007, Page 299-311

https://doi.org/10.30684/etj.25.2.18

Abstract
  In this paper, a new algorithm for accurate optical flow estimation using discretewavelet approximation is proposed. The image sequences are always assumed tobe noiseless in the computation ...  Read More ...
Behavior of High Strength Concrete L-Beams Under Combined Bending and Shear
Behavior of High Strength Concrete L-Beams Under Combined Bending and Shear

Omer Q. Aziz; Ferhad R. Karim

Volume 25, Issue 2 , April 2007, Page 312-327

https://doi.org/10.30684/etj.25.2.19

Abstract
  This investigation examines experimentally and statistically the behaviorand ultimate strength of L-shape reinforced high strength concrete beamsunder combined bending and shear. The ...  Read More ...