Numerical Investigation on the Performance of an External Compression Supersonic Air Intake Using By-Pass Technique
Numerical Investigation on the Performance of an External Compression Supersonic Air Intake Using By-Pass Technique

Jalal M. Jalil; Abdullateef A. Jadallah; Ahmed F. Mahdi

Volume 31, A 6 , June 2013, Page 1011-1025

https://doi.org/10.30684/etj.31.6A1

Abstract
  Two-dimensional, supersonic flow field computation with by-pass holes has been conducted using Euler equation. An algorithm based on finite difference McCormack's technique is used ...  Read More ...
Neuro-Fuzzy Controller forMethanol Recovery Distillation Column
Neuro-Fuzzy Controller forMethanol Recovery Distillation Column

Safa A. Al-Naimi; Ghydaa M. Jaid

Volume 31, A 6 , June 2013, Page 1026-1044

https://doi.org/10.30684/etj.31.6A2

Abstract
  Distillation columns are widely used in chemical processes as separation systems in industries. In order to gain better product quality and lower the energy consumption of the distillation ...  Read More ...
Optimal Design of Three-Phalanx Prosthesis Underactuated Fingers Using Genetic Algorithm
Optimal Design of Three-Phalanx Prosthesis Underactuated Fingers Using Genetic Algorithm

Sadeq H. Bakhy; Shaker S. Hassan; Somer M. Nacy; Alejandro Hernandez-Arieta; K. Dermitzakis

Volume 31, A 6 , June 2013, Page 1045-1068

https://doi.org/10.30684/etj.31.6A3

Abstract
  This research is interested to investigate the optimum design procedure for a finger driving mechanism to have a proper configuration of the finger for its utilization in hand prosthesis. ...  Read More ...
Artificial Groundwater Recharge in Iraq through Rainwater Harvesting (Case Study)
Artificial Groundwater Recharge in Iraq through Rainwater Harvesting (Case Study)

Ibtesam R. Kareem

Volume 31, A 6 , June 2013, Page 1069-1080

https://doi.org/10.30684/etj.31.6A4

Abstract
  Groundwater is considered as an important source of water supply in Iraq, so it is need replenishing by any way of recharging. The most important way for recharging the groundwater ...  Read More ...
Fracture Statistics of Porcelain Ceramic: The Influence of Zirconia Additive and Sintering Temperature
Fracture Statistics of Porcelain Ceramic: The Influence of Zirconia Additive and Sintering Temperature

Fadhil A.Chyad

Volume 31, A 6 , June 2013, Page 1081-1091

https://doi.org/10.30684/etj.31.6A5

Abstract
  The knowledge of statistic characteristics in mechanical properties is important for designer in order to asses the reliability of the structure. Scatter characteristics of fracture ...  Read More ...
Effect of External Sulfate Attack on Self Compacted Concrete
Effect of External Sulfate Attack on Self Compacted Concrete

Zena K. Abbas Al-Anbori

Volume 31, A 6 , June 2013, Page 1092-1106

https://doi.org/10.30684/etj.31.6A6

Abstract
  Self-compacting concrete (SCC) is an innovative concrete that does not require vibration for placing and compaction. It is able to flow under its own weight, completely filling formwork ...  Read More ...
A VHDL Model for Implementation of MD5 Hash Algorithm
A VHDL Model for Implementation of MD5 Hash Algorithm

Mohammed A. Noaman

Volume 31, A 6 , June 2013, Page 1107-1116

https://doi.org/10.30684/etj.31.6A7

Abstract
  With the increase of the amount of data and users in the information systems, the requirement of data integrity is needed to be improved as well, so the work has become necessary independently. ...  Read More ...
Studying some of the Geotechnical Properties of Stabilized Iraqi Clayey Soils
Studying some of the Geotechnical Properties of Stabilized Iraqi Clayey Soils

Ishraq Khudhair Abass

Volume 31, A 6 , June 2013, Page 1117-1130

https://doi.org/10.30684/etj.31.6A8

Abstract
  In many road construction projects, if weak soils exist, stabilization and improvement of their properties is necessary. The stabilization process aims at increasing the soil strength ...  Read More ...
Evaluation of Acoustics Insulation and Thermal Conductivity through Walls in Building
Evaluation of Acoustics Insulation and Thermal Conductivity through Walls in Building

Haqi Ismael Qatta

Volume 31, A 6 , June 2013, Page 1131-1150

https://doi.org/10.30684/etj.31.6A9

Abstract
  Anew type of porous clay bricks is proposed , this research studies the effect of adding industrial wastes admixtures with different percentages on the thermal and acoustics insulation ...  Read More ...
Comparative Investigation of Friction StirWelding and Tungsten Inert on Gas of 6061T651 Aluminum Alloy Mechanical Property and Microstructure
Comparative Investigation of Friction StirWelding and Tungsten Inert on Gas of 6061T651 Aluminum Alloy Mechanical Property and Microstructure

Samer Jasim Mahmood

Volume 31, A 6 , June 2013, Page 1151-1165

https://doi.org/10.30684/etj.31.6A10

Abstract
  This study has been conducted to investigate the effect of welding process parameter on the mechanical properties and microstructure of aluminum alloy 6061, using friction stir welding ...  Read More ...
Multi-Stages for Tuning Fuzzy Logic Controller (FLC) Using Genetic Algorithm (GA)
Multi-Stages for Tuning Fuzzy Logic Controller (FLC) Using Genetic Algorithm (GA)

Ammar G. Samir

Volume 31, A 6 , June 2013, Page 1166-1181

https://doi.org/10.30684/etj.31.6A11

Abstract
  In this paper, a study on tuning of fuzzy logic controller (FLC) using genetic algorithm (GA) for controlling an armature controlled DC motor as an example of linear plant and for controlling ...  Read More ...
The Effect of Different Operating Parameters on the Corrosion Rate of Carbon Steel in Petroleum Fractions
The Effect of Different Operating Parameters on the Corrosion Rate of Carbon Steel in Petroleum Fractions

Nagham Salman Hassan

Volume 31, A 6 , June 2013, Page 1182-1193

https://doi.org/10.30684/etj.31.6A12

Abstract
  The corrosion in petroleum pipelines was investigated by the studying the corrosion of carbon steel in crude oil and refined petroleum products which include gasoline, kerosene, and ...  Read More ...
Experimental Investigation of Minimum Fluidization Velocity in Three Phase Inverse Fluidized Bed System
Experimental Investigation of Minimum Fluidization Velocity in Three Phase Inverse Fluidized Bed System

Khawla A. Ali; Ali Huseein Jawad; Sarmad I. Ibrahim

Volume 31, A 6 , June 2013, Page 1194-1203

https://doi.org/10.30684/etj.31.6A13

Abstract
  Minimum fluidization velocity is one of the most important parameters when characterizing the hydrodynamics of a fluidized bed. Experiment studies on the effects of bed height and material ...  Read More ...
Design and Implementation of an Interface Circuit for DC Motor Speed Control Using the PWM Technique
Design and Implementation of an Interface Circuit for DC Motor Speed Control Using the PWM Technique

Firas Mohammed Ali Al-Raie

Volume 31, A 6 , June 2013, Page 1204-1212

https://doi.org/10.30684/etj.31.6A14

Abstract
  In this paper an electronic interface circuit for controlling the speed of a small permanent magnet DC motor with the aid of a personal computer (PC) has been designed and implemented. ...  Read More ...
Computation of Energy Distribution as A Function of Wave-Vector (K) for Specifi c CNT Configuration
Computation of Energy Distribution as A Function of Wave-Vector (K) for Specifi c CNT Configuration

Hiba Hassan

Volume 31, A 6 , June 2013, Page 1213-1220

https://doi.org/10.30684/etj.31.6A15

Abstract
  In this paper, the energy dispersion relation has been calculated for certain configuration of single wall carbon nanotubes (SWNT) with respect to the wave vector (k). The three types ...  Read More ...