Effect of Graphite Particles Addition on the Wear Resistance and Friction coefficient of Brass Alloy (α)
Effect of Graphite Particles Addition on the Wear Resistance and Friction coefficient of Brass Alloy (α)

Esraa Abdel-Qader; Maryam Abdual-Alazim Baqer

Volume 27, Issue 6 , April 2009, Page 218-233

https://doi.org/10.30684/etj.27.6.20

Abstract
  This research is devoted to study the effect of different percentage of Graphiteparticles addition (5,10,15) wt% to Brass alloy (α) produced by stir casting using vortextechnique ...  Read More ...
Effect of Current on Average Surface Roughness of Borosilicate Glass at EDM Machining and Comparison with Numerical Programs
Effect of Current on Average Surface Roughness of Borosilicate Glass at EDM Machining and Comparison with Numerical Programs

Wathik I. Mahdi; Maan A. Tawfiq; Shukry H. Aghdeab

Volume 27, Issue 6 , April 2009, Page 1026-1038

https://doi.org/https://doi.org/10.30684/etj.27.6.1

Abstract
  Machining of electrically non-conducting materials like glass is still a major problem. The principle of electric arc was used to generate high electrical discharge (spark) at high ...  Read More ...
Laser sealing and thermal shock resistance of 6.5 wt% yttria Partially stabilized zirconia plasma sprayed layers
Laser sealing and thermal shock resistance of 6.5 wt% yttria Partially stabilized zirconia plasma sprayed layers

Mohammed Jasim Kadhim

Volume 27, Issue 6 , April 2009, Page 1039-1048

https://doi.org/10.30684/etj.27.6.2

Abstract
  Laser sealing of zirconia-6.5 wt% yttria partially stabilized zirconia (YPSZ) plasmasprayed layers were examined for both plan views and transverse sections. Scanningelectron microscopy ...  Read More ...
Simulation of Active Magnetic Bearing Response based NNC
Simulation of Active Magnetic Bearing Response based NNC

Naseer Qassim Hamoody; Adil Hameed Ahmad

Volume 27, Issue 6 , April 2009, Page 1047-1063

https://doi.org/10.30684/etj.27.6.3

Abstract
  The present work is dealing with the modeling, investigations, and controlling, of a prototype radial magnetic bearing system. Considerations based on the 8 poles model with switched ...  Read More ...
HDNA : Heuristic DNA Computing Algorithm
HDNA : Heuristic DNA Computing Algorithm

Ahmed Tariq Sadiq; Hasanen Samir Abdullah

Volume 27, Issue 6 , April 2009, Page 1064-1073

https://doi.org/10.30684/etj.27.6.4

Abstract
  The proposed system is based on embedded the heuristic search in DNA search algorithm so to make it more efficient and flexible. The HDNA system is constructed to improve the work of ...  Read More ...
Adiabatic and Separated Flow of R-22 and R-407C in Capillary Tube
Adiabatic and Separated Flow of R-22 and R-407C in Capillary Tube

Ahmed Abdulnabi Imran

Volume 27, Issue 6 , April 2009, Page 1074-1082

https://doi.org/10.30684/etj.27.6.5

Abstract
  In this paper adiabatic flow in capillary tube is analyzed and modeled for R-22 andalternative R-407C. The equations of continuity, energy and pressure drop through acapillary tube ...  Read More ...
Study of The Optimization Condition Of Batch Sterilization Using Genetic Algorithm
Study of The Optimization Condition Of Batch Sterilization Using Genetic Algorithm

Thamer J.Mohammed; Ittehad F.Tobia; Salah N.F.Al-Obaidi

Volume 27, Issue 6 , April 2009, Page 1083-1092

https://doi.org/10.30684/etj.27.6.6

Abstract
  The present work is designed to study the parameters interaction of sterilizationprocesses in batch bioreactors (fermentors of volume 120 liter with medium of 56784 kg).he parameters ...  Read More ...
Syntheses, Characterization and Study of Use of Manganese (III) Schiff-Base Complex as Thermal Initiation in Radical Polymerization of Styrene
Syntheses, Characterization and Study of Use of Manganese (III) Schiff-Base Complex as Thermal Initiation in Radical Polymerization of Styrene

Ahlam Said Maroof

Volume 27, Issue 6 , April 2009, Page 1093-1107

https://doi.org/10.30684/etj.27.6.7

Abstract
  The new schiff base complex: Chloro- (bis (salicylaldehyde) ethylene diiminato)aqua manganese (III) is synthesized and characterized. It is used as thermal initiation inradical polymerization ...  Read More ...
Simulation Study 0f 802.11b DCF Using OPNET Simulator
Simulation Study 0f 802.11b DCF Using OPNET Simulator

Mohammad Hussian Ali; Manal Kadhim Odah

Volume 27, Issue 6 , April 2009, Page 1108-1117

https://doi.org/10.30684/etj.27.6.8

Abstract
  A simulation study of an IEEE 802.11b which is the most important standard forwireless local area networks was presented in this paper. The simulation is conducted usingOPNET IT Guru ...  Read More ...
Numerical Simulation of a Two-Dimension Ramp Inlet Flow Field
Numerical Simulation of a Two-Dimension Ramp Inlet Flow Field

Jalal M. Jalil; Ahmed F. Kridy

Volume 27, Issue 6 , April 2009, Page 1118-1126

https://doi.org/10.30684/etj.27.6.9

Abstract
  The Two-dimension ramp inlet flow field was studied with typical mode operations.Euler equations were used for solution with no special treatment required. In this work asolution algorithm ...  Read More ...
A Secure Mobile Banking Using Kerberos Protocol
A Secure Mobile Banking Using Kerberos Protocol

Mohammad N. Abdullah; May T. Abdul-Hadi

Volume 27, Issue 6 , April 2009, Page 1127-1133

https://doi.org/10.30684/etj.27.6.10

Abstract
  Because the network is an open environment, a lot of care must be taken whentransferring sensitive information especially when related with financial data. This dependson the principals ...  Read More ...
The Effect of Surfactant Concentration on the Rate of CO2 Absorption by Carbonate Solution in Packed Tower
The Effect of Surfactant Concentration on the Rate of CO2 Absorption by Carbonate Solution in Packed Tower

Fadil H. Faraj; Alyaa K. Mageed

Volume 27, Issue 6 , April 2009, Page 1134-1142

https://doi.org/10.30684/etj.27.6.11

Abstract
  Absorption of carbon dioxide from gaseous mixture (carbon dioxide, air) wasstudied by using Carbonate Solution (Na2CO3) in a counter-current packed column (7.5 cmid, 1.70 m height), ...  Read More ...
Using of Taguchi Method to Optimize the Casting of Al–Si /Al2O3 Composites
Using of Taguchi Method to Optimize the Casting of Al–Si /Al2O3 Composites

Osama S. Muhammed; Haitham R. Saleh; Hussam L. Alwan

Volume 27, Issue 6 , April 2009, Page 1143-1150

https://doi.org/10.30684/etj.27.6.12

Abstract
  Taguchi method is a problem – solving tool which can improve the performanceof the product, process design and system. This method combines the experimental andanalytical concepts ...  Read More ...
Effect of Laser Surface Treatment on Wear Resistance of 100Cr6 Steel
Effect of Laser Surface Treatment on Wear Resistance of 100Cr6 Steel

Khansaa Dawood Salman

Volume 27, Issue 6 , April 2009, Page 1151-1161

https://doi.org/https://doi.org/10.30684/etj.27.6.13

Abstract
  The effect of laser surface heat treatment on wear resistance of 100Cr6 steel wasinvestigated. In this work, 100Cr6 steel which is widely used in many industrial of automobileshardened ...  Read More ...
Video Image for Security System by Using Chaotic Oscillator for Segmentation
Video Image for Security System by Using Chaotic Oscillator for Segmentation

Emad Kadum Jabbar Alfatly; Nuha Jameel Ibrahim

Volume 27, Issue 6 , April 2009, Page 1162-1173

https://doi.org/10.30684/etj.27.6.14

Abstract
  There are wide variety of mechanisms available for performing the authenticationfunction. One of them is by using video film to monitor important places. In such systemsthe important ...  Read More ...
Correlation between Thickness, Grain Size and Optical Band Gap of CdI2 Film
Correlation between Thickness, Grain Size and Optical Band Gap of CdI2 Film

Modaffer A. Mohammed

Volume 27, Issue 6 , April 2009, Page 1174-1183

https://doi.org/10.30684/etj.27.6.15

Abstract
  Structural and optical property was studied as a function of film thickness forthermally evaporated CdI2 films. Stoichiometric films (up to 250 nm thickness) showinghexagonal structure, ...  Read More ...
Data Hiding in Sound Using Time Modulation of Unvoiced Blocks
Data Hiding in Sound Using Time Modulation of Unvoiced Blocks

Hilal H. Saleh; Loay A. Jorj; Nidaa F.Hassan

Volume 27, Issue 6 , April 2009, Page 1184-1196

https://doi.org/10.30684/etj.27.6.16

Abstract
  This paper is concerned with hiding secret data in audio media file (.WAV). Whenperforming data hiding in audio, one must exploit the weaknesses of Human Auditory System(HAS), while ...  Read More ...
Studing The Mechanical Properties And Morphology of Ternary Blends Of Polyethylene
Studing The Mechanical Properties And Morphology of Ternary Blends Of Polyethylene

Nabeela A. Mohammed

Volume 27, Issue 6 , April 2009, Page 1197-1205

https://doi.org/10.30684/etj.27.6.17

Abstract
  The mechanical properties and the morphology of the ternary blend ofLDPE/LLDPE/HDPE were studied.In the present work LDPE was mixed with equal amount of LLDPE and differentwt% of HDPE ...  Read More ...
A Data Base for Self-Compacting Concrete in Iraq
A Data Base for Self-Compacting Concrete in Iraq

Shakir A. Al-Mishhadani; Mays F. Al-Rubaie

Volume 27, Issue 6 , April 2009, Page 1206-1218

https://doi.org/10.30684/etj.27.6.18

Abstract
  Self-Compacting Concrete is considered one of most remarkable developments inconcrete technology. It is a new type of high performance concrete with the ability offlowing under its ...  Read More ...
Behavior of Short Reinforced Porcelinite Concrete Columns Under Concentric Loads
Behavior of Short Reinforced Porcelinite Concrete Columns Under Concentric Loads

Kaiss F. Sarsam; Ihsan A. S. Al-Shaarbaf; Mustafa S. Shuber

Volume 27, Issue 6 , April 2009, Page 1219-1233

https://doi.org/10.30684/etj.27.6.19

Abstract
  This study presents on experimental method to investigate the behavior ofreinforced porcelinite concrete columns subjected to concentric load. The experimentalwork includes investigation ...  Read More ...