Experimental Study of the Effect Geometrical Shape and Vertical Vibrations on Forced Convection Heat Transfer Coefficient from Circumferentially Triangle-Cross Section Finned Cylinder
Experimental Study of the Effect Geometrical Shape and Vertical Vibrations on Forced Convection Heat Transfer Coefficient from Circumferentially Triangle-Cross Section Finned Cylinder
Volume 29, Issue 4 , March 2011, Page 153-174

https://doi.org/10.30684/ etj.29.4.16

Abstract
  The aim of this work is to perform an experimental study for the effect of forced vertical vibrations on forced convection heat transfer coefficient, by the use of a circumferential ...  Read More ...
Effect of Asphalt Concrete Test Results Deviation on Ratio Discount Decided of Cost And Ability Decrement
Effect of Asphalt Concrete Test Results Deviation on Ratio Discount Decided of Cost And Ability Decrement
Volume 29, Issue 4 , March 2011, Page 175-194

https://doi.org/10.30684/ etj.29.4.17

Abstract
  The road is the mirror of the civilization in any country so the quality and the quantity of the paved road measure the development in the country. During construction stage must be ...  Read More ...
Studying The Importance of Evaluation And Determination of Volume Fraction Values For Wound Glass And Carbon Fiber Reinforced Composites
Studying The Importance of Evaluation And Determination of Volume Fraction Values For Wound Glass And Carbon Fiber Reinforced Composites
Volume 29, Issue 4 , March 2011, Page 195-204

https://doi.org/10.30684/etj.29.4.18

Abstract
  The wide and increased use of the composite materials in industry especially intoimportant applications such as pipes and pressure vessels tends to give the study oftheir properties ...  Read More ...
Analytical Criticizing Study of Governmental Contracts Instructions no.1, Issued by the Ministry of Planning and Developing Cooperation at 2008
Analytical Criticizing Study of Governmental Contracts Instructions no.1, Issued by the Ministry of Planning and Developing Cooperation at 2008
Volume 29, Issue 4 , March 2011, Page 205-217

https://doi.org/10.30684/ etj.29.4.19

Abstract
  For the important role of the Governmental Contracts Instructions, issued bythe Ministry of Planning and Developing Cooperation, in regulating the works ofthe Iraqi Construction Sector, ...  Read More ...
The Effect of Hardening Exponent on Mechanical Properties of (Al-Si) Alloy
The Effect of Hardening Exponent on Mechanical Properties of (Al-Si) Alloy
Volume 29, Issue 4 , March 2011, Page 218-230

https://doi.org/10.30684/ etj.29.4.20

Abstract
  This approach involves theoretical and experimental study on the effect of cold working percentage on the hardening exponent (n). The important of this object deals with relation of ...  Read More ...
Three-Dimensional Analysis of Extrusion in Complex Die by Using Upper Bound Theory
Three-Dimensional Analysis of Extrusion in Complex Die by Using Upper Bound Theory

Hatam Karim Kadhim; Raed Naeem Hwyyin; Azhar Sabah Ameed

Volume 29, Issue 4 , March 2011, Page 639-650

https://doi.org/10.30684/ etj.29.4.1

Abstract
  This paper depends on a new analytical method to calculate relative deformation energies for complex die shape by using upper bound theory which is an important method to solve technical ...  Read More ...
Sensitivity of Serum Acetylcholine Esterase Toward Derivatives of Oxadiazole
Sensitivity of Serum Acetylcholine Esterase Toward Derivatives of Oxadiazole

Zyzaffon N; Rehab A. M. Al-Hasani; Fatin F. Al-Kazzaz

Volume 29, Issue 4 , March 2011, Page 651-664

https://doi.org/10.30684/ etj.29.4.2

Abstract
  This work addresses the kinetic analysis of the interaction of some oxadiazoles (L1 , L2, L3 & L4) in ethanol with serum acetylcholinesterase. It was found that ethanol have inhibitory ...  Read More ...
Mechanical Strength of Silicon Carbide Bonded with Iraqi Clays
Mechanical Strength of Silicon Carbide Bonded with Iraqi Clays

Abdul Mutalb Al Sheikh; Shihab Ahmed Zaidan Al- Juboori; Kassim S. Kassim

Volume 29, Issue 4 , March 2011, Page 665-676

https://doi.org/10.30684/ etj.29.4.3

Abstract
  Two types of Iraqi clays (Kaolin and Bentonite) were used in bonding process with different weight percentage (5%, 10%, 15%, 20%, and 25%) and with different particle size from clays ...  Read More ...
Study of Transient Simulation for Solar Heating System
Study of Transient Simulation for Solar Heating System

Laith Abdulmonem. Ismael; Qussai Jihad Abdul-Ghafour; Sabah Tarik Ahmed

Volume 29, Issue 4 , March 2011, Page 677-697

https://doi.org/10.30684/ etj.29.4.4

Abstract
  In the current study simulation method was used for design of solar water heating system. An integrated transient simulation program was built up for simulating the Iraqi solar house ...  Read More ...
Study of the Optical Constants of the PMMA/PC Blends
Study of the Optical Constants of the PMMA/PC Blends

Marwa. R. F; Nahida. J. H

Volume 29, Issue 4 , March 2011, Page 698-708

https://doi.org/10.30684/ etj.29.4.5

Abstract
  The aim of the present work is concerned with the study of the optical constants of the PMMA/PC blend at different concentrations. The samples are casted as films from the PMMA and ...  Read More ...
Numerical Methods for Fractional Reaction-Dispersion Equation with Riesz Space Fractional Derivative
Numerical Methods for Fractional Reaction-Dispersion Equation with Riesz Space Fractional Derivative

I. I. Gorial

Volume 29, Issue 4 , March 2011, Page 709-715

https://doi.org/10.30684/ etj.29.4.6

Abstract
  In this paper, a numerical solution of fractional reaction-dispersion equation with Riesz space fractional derivative has been presented. The algorithm for the numerical solution for ...  Read More ...
Texture Analysis of Brodatz Images Using Statistical Methods
Texture Analysis of Brodatz Images Using Statistical Methods

Alyaa Hussain Ali; Alaa Noori Mazher

Volume 29, Issue 4 , March 2011, Page 716-724

Abstract
  Textures are one of the important features in computer vision for many applications. Most of attention has been focused on the texture features. An important approach to region description ...  Read More ...
Long Term Strength and Durability of Clayey Soil Stabilized With Lime
Long Term Strength and Durability of Clayey Soil Stabilized With Lime

Abdulrahman H. Al-Zubaydi; Moafaq A. Al-Atalla; Ibrahaim M. Al-Kiki

Volume 29, Issue 4 , March 2011, Page 725-735

https://doi.org/10.30684/ etj.29.4.8

Abstract
  This study deals with durability characteristics and unconfined compressive strength of clayey soil stabilized with lime. The tests comprises of unconfined compressive strength for ...  Read More ...
Study of Signal Estimation Parameters via Rotational Invariance Technique by Using Ants Colony Optimization Algorithm
Study of Signal Estimation Parameters via Rotational Invariance Technique by Using Ants Colony Optimization Algorithm

Ali Abdul-Elah Noori; Sadiq Kamel Gharghan; Ali Jaber Abdul Wahhab

Volume 29, Issue 4 , March 2011, Page 736-749

https://doi.org/10.30684/ etj.29.4.9

Abstract
  In this paper, an algorithm based on Ants Colony Optimization (ACO) is proposed for extraction of the Directions of Arrival (DOA) of several signals impinging on uniform linear arrays. ...  Read More ...
Cryogenic Treatments of Hot Work Tool Steel (56NiCrMoV7)
Cryogenic Treatments of Hot Work Tool Steel (56NiCrMoV7)

Amin. D. Thamir; Ibrahim K. Ahamed

Volume 29, Issue 4 , March 2011, Page 750-769

https://doi.org/10.30684/ etj.29.4.10

Abstract
  The main objective of this paper is to study the effect of Cryogenic treatment of hot work tool steel type (56NiCrMoV7) on the microstructure and mechanical properties. Three different ...  Read More ...
Watermarking in WAV Files Bases on Phase Coding
Watermarking in WAV Files Bases on Phase Coding

Salah S. Alrawi; Rasheed Abdulshaheed; Akeel A. Alhadithy

Volume 29, Issue 4 , March 2011, Page 770-780

https://doi.org/10.30684/ etj.29.4.11

Abstract
  The growth of the network multimedia open the illegal ways for users to use the digital media without any hindrance or control. This state created, the need for the copyright protection ...  Read More ...
Generating of Chaotic Signals by using Semiconductor Laser with Optical Feedback
Generating of Chaotic Signals by using Semiconductor Laser with Optical Feedback

Shatha M. Hasan; Mohammed S. Mehde; Raad S. Fyath

Volume 29, Issue 4 , March 2011, Page 781-790

https://doi.org/10.30684/ etj.29.4.12

Abstract
  This paper addresses theoretically generating the chaotic signals by using semiconductor laser diode of 1550 nm with optical feedback. The performance of a semiconductor laser subjected ...  Read More ...
Advanced Neighborhood Operation Based Image Zooming In
Advanced Neighborhood Operation Based Image Zooming In

Mithaq N. Raheema

Volume 29, Issue 4 , March 2011, Page 791-804

https://doi.org/10.30684/ etj.29.4.13

Abstract
  Perhaps the most interesting feature of digitally encoded image data is that the image can be analytically manipulated. An entire field of computer graphics, named image processing, ...  Read More ...
The Effect of Pure Aluminum Weight Percent on Different Properties of a New Cermet Material Made of Al-Machinable Glass Ceramic
The Effect of Pure Aluminum Weight Percent on Different Properties of a New Cermet Material Made of Al-Machinable Glass Ceramic

Bayda Abdul-Hassan Khalaf

Volume 29, Issue 4 , March 2011, Page 805-813

https://doi.org/10.30684/ etj.29.4.14

Abstract
  In this research high pure aluminum metal with the following weight percent (1,2,3,4,5) has been added to machinable glass-ceramic, after the preparation of the samples by pressing ...  Read More ...
Study on The Production of Ammonium Sulfate Fertlizer From Phosphogypsum
Study on The Production of Ammonium Sulfate Fertlizer From Phosphogypsum

Khalid K. Abbas

Volume 29, Issue 4 , March 2011, Page 814-821

https://doi.org/10.30684/ etj.29.4.15

Abstract
  The production of ammonium sulfate fertilizer from phosphogypsumis studied. The phosphogypsum is considered by product from extraction processof sulphoric acid. The mereseberg process ...  Read More ...