Performance Changes For Window Type Air-Conditioner Unit Chemically Treated To Work In An Industrial Petrochemical Environment
Performance Changes For Window Type Air-Conditioner Unit Chemically Treated To Work In An Industrial Petrochemical Environment
Volume 29, Issue 9 , June 2011, Page 430-447

https://doi.org/10.30684/etj.29.9.19

Abstract
  Since most of our industrial applications suffer from aging of units. and hence the penalty of gaseous harmful releases with bad corrosive influences on airconditioning components. ...  Read More ...
Influence of The Air Flow In The Induction System On The Performance Of A Reciprocating Air Compressor
Influence of The Air Flow In The Induction System On The Performance Of A Reciprocating Air Compressor
Volume 29, Issue 9 , June 2011, Page 448-462

https://doi.org/10.30684/etj.29.9.20

Abstract
  The aim of this work is to study the effect of the flow in the induction system on the reciprocating air compressor performance. The study was carried out on the reciprocating air compressor ...  Read More ...
Study Some Physical and Mechanical Properties of Ceramic – Ceramic Fibers Composite
Study Some Physical and Mechanical Properties of Ceramic – Ceramic Fibers Composite

Fadhil Attiya Chyad

Volume 29, Issue 9 , June 2011, Page 1631-1640

https://doi.org/10.30684/etj.29.9.1

Abstract
  Zirconia fibers have been prepared by convertional method using cotton threads impregrated in zirconium oxychloride solution ( ZrOCl2. 8H2O ). X-ray diffraction shows the crystallinity ...  Read More ...
Microstructure and Hardness Effects on Behavior of Copper Alloy under Creep – Fatigue Interaction
Microstructure and Hardness Effects on Behavior of Copper Alloy under Creep – Fatigue Interaction

Mairb R. Abdul Hassan

Volume 29, Issue 9 , June 2011, Page 1641-1650

https://doi.org/10.30684/etj.29.9.2

Abstract
  The microstructure and hardness of copper alloy after fatigue-creep interaction testing have been investigated. Experiments were carried out in the temperature range from room temperature ...  Read More ...
Expansion Methods for Solving Linear Integral Equations with Multiple Time Lags Using B-Spline and Orthogonal Functions
Expansion Methods for Solving Linear Integral Equations with Multiple Time Lags Using B-Spline and Orthogonal Functions

Atheer Jawad Kadhim

Volume 29, Issue 9 , June 2011, Page 1651-1661

https://doi.org/10.30684/etj.29.9.3

Abstract
  The main portion of the paper is devoted for constructing approximated solutions of linear integral equations with multiple time lags (IEMTL) using two different types of basis functions ...  Read More ...
Mathematical Technique for Controlling the Gaps in the Cubic Bezier Curves for Two Dimensional
Mathematical Technique for Controlling the Gaps in the Cubic Bezier Curves for Two Dimensional

Ali Hassan Hammadie

Volume 29, Issue 9 , June 2011, Page 1662-1672

https://doi.org/10.30684/etj.29.9.4

Abstract
  Designs are generated in the Bezier curves at most contains gaps in form that is drawn up in curve. This state is causing misshaping final form that depended on curves generating. In ...  Read More ...
Galvanic Cathodic Protection Evaluation of a Steel Pipe in Iraqi Soil
Galvanic Cathodic Protection Evaluation of a Steel Pipe in Iraqi Soil

Jafer T. Al-Haidary; Mohammed H. Hafiz; Yasir Muhi Abdu Al-Sahib

Volume 29, Issue 9 , June 2011, Page 1673-1690

https://doi.org/10.30684/etj.29.9.5

Abstract
  Corrosion is the main problem for the embedded pipelines in different environment resistivities. The most effective method to overcome this problem is cathodic protection which represents ...  Read More ...
The Study of Typical Conditions to Remove Co from Water by Adsorption by Using Activated Carbon
The Study of Typical Conditions to Remove Co from Water by Adsorption by Using Activated Carbon

Shaymaa H. Khazaal

Volume 29, Issue 9 , June 2011, Page 1691-1700

https://doi.org/10.30684/etj.29.9.6

Abstract
  The effective removal of heavy metal ions from water is among the most important issues for many industrialized countries. The present work has been carried out to study the adsorption ...  Read More ...
The Effect of Filler Type on the Hot Mix Asphalt Behavior
The Effect of Filler Type on the Hot Mix Asphalt Behavior

Sady Abd Tayh; Aqeel Raheem Jabr

Volume 29, Issue 9 , June 2011, Page 1701-1720

https://doi.org/10.30684/etj.29.9.7

Abstract
  The test have been done on many samples of Hot Mix Asphalt using many types fillers like Portland Cement, Limestone, Hydrated Lime as a filler, 1% Hydrated Lime added to conventional ...  Read More ...
Numerical Study of Entropy Generation in a Vertical Square Channel Packed with Saturated Porous Media
Numerical Study of Entropy Generation in a Vertical Square Channel Packed with Saturated Porous Media

Abdulhassan A. Karamallah; Wahid S. Mohammad; Wissam Hashim Khalil

Volume 29, Issue 9 , June 2011, Page 1721-1736

https://doi.org/10.30684/etj.29.9.8

Abstract
  Entropy generation in a vertical square channel packed with saturated porous media, and subjected to differentially heated isothermal walls has been numerically investigated. The effect ...  Read More ...
Sensorless Vector Control of Three Phase Induction Motor Based on Full Neural Estimator and Controller
Sensorless Vector Control of Three Phase Induction Motor Based on Full Neural Estimator and Controller

Fatma H. Faris

Volume 29, Issue 9 , June 2011, Page 1737-1750

https://doi.org/10.30684/etj.29.9.9

Abstract
  Conventional vector control of A.C drives are widely used in industry and many other applications, where high dynamic performance is required, this type of controller usually needs ...  Read More ...
Application of GIS for the Evaluation of Electromagnetic Field Effects for Iraqi 132KV Electrical Transmission System
Application of GIS for the Evaluation of Electromagnetic Field Effects for Iraqi 132KV Electrical Transmission System

Afaneen A. Alkhazraji; Suad I. Shahl

Volume 29, Issue 9 , June 2011, Page 1751-1764

https://doi.org/10.30684/etj.29.9.10

Abstract
  This research endeavors to create the 50Hz electromagnetic field atlas for populated urban areas in the city of Baghdad (Iraq). For this purpose, the 3- dimensions numerical model based ...  Read More ...
Ceramic Filled Polymer Matrix Composite Used For Bio-Medical Application
Ceramic Filled Polymer Matrix Composite Used For Bio-Medical Application

Waleed Asim Hanna; Abbas Khammas Hussei; Hayder Abbas Sallal

Volume 29, Issue 9 , June 2011, Page 1765-1773

https://doi.org/10.30684/etj.29.9.11

Abstract
  Synthetic polymers such as polyurethane are used widely in the field of biomedical applications such as implants or part of implant systems. This work focuses on the preparation of ...  Read More ...
Cutting Forces Prediction in Ball End Milling
Cutting Forces Prediction in Ball End Milling

Hussain S. Kitan; Bahaa I. Kadhim; Susan A. Abdulrazzaq

Volume 29, Issue 9 , June 2011, Page 1774-1789

https://doi.org/10.30684/etj.29.9.12

Abstract
  In curved surface machining, parametric surface representation is normally used for computer aided design (CAD). Parametric surfaces are often machined using a flat end mill for roughing ...  Read More ...
On Fuzzy Normed Spaces
On Fuzzy Normed Spaces

Jehad R. Kider

Volume 29, Issue 9 , June 2011, Page 1790-1795

https://doi.org/10.30684/etj.29.9.13

Abstract
  In this paper we introduce a new definition of a fuzzy normed space (to the best of our knowledge) then the related concepts such as fuzzy continuous, convergence of sequence of fuzzy ...  Read More ...
Number of Quantum Well(s) Effects on GaN-Based VCSELs
Number of Quantum Well(s) Effects on GaN-Based VCSELs

Farah Z. Jasim

Volume 29, Issue 9 , June 2011, Page 1796-1803

https://doi.org/10.30684/etj.29.9.14

Abstract
  Advanced numerical simulation program was used to analyze the performance of GaN based vertical cavity surface emitting laser (VCSEL) with single, double and triple quantum well(s) ...  Read More ...
A Study Mechanical Properties of Epoxy Resin Cured at Constant Curing Time and Temperature with Different Hardeners
A Study Mechanical Properties of Epoxy Resin Cured at Constant Curing Time and Temperature with Different Hardeners

Najat j. Saleh; Adnan A. Abdul Razak; Manal A. Tooma; Mariam E.Aziz

Volume 29, Issue 9 , June 2011, Page 1804-1819

https://doi.org/10.30684/etj.29.9.15

Abstract
  In this study, a low molecular weight epoxy resin diglycidyl ether of bisphenol A (DGEBA) is cured isothermally with an aliphatic and aromatic amine hardeners separately. (1) Triethylenetetramine ...  Read More ...
The Primary Decomposition of the Factor Group K(G)
The Primary Decomposition of the Factor Group K(G)

Manal N.AL-Harere; Fuad A.AL-Heety

Volume 29, Issue 9 , June 2011, Page 1820-1829

https://doi.org/10.30684/etj.29.9.16

Abstract
  The main purpose of this work is to find the primary decomposition of the factor group K (The factor group of all Z-valued class functions module the group of Z-valued generalized characters ...  Read More ...
Numerical and Experimental Investigation of Mechanical and Thermal Buckling Loads of Composite Laminated Plates
Numerical and Experimental Investigation of Mechanical and Thermal Buckling Loads of Composite Laminated Plates

Ammar A. Hussein; Hassan H. Mahdi; Nessren H. Ahmed

Volume 29, Issue 9 , June 2011, Page 1830-1844

https://doi.org/10.30684/etj.29.9.17

Abstract
  In this study, the effect of temperature, aspect ratio, number of layer and boundary conditions on critical buckling load of composite laminated plate is investigated experimentally ...  Read More ...
Determination of the Adequate Thickness of Granular Subbase Beneath Foundations
Determination of the Adequate Thickness of Granular Subbase Beneath Foundations

Mohammed Y. Fattah; Falah H. Rahil; Mohammed A. Turki

Volume 29, Issue 9 , June 2011, Page 1845-1869

https://doi.org/10.30684/etj.29.9.18

Abstract
  Where the native soils have poor structural qualities or are expansive, the soil investigation report may recommend importation of soils better suited to providing a subbase for structures. ...  Read More ...