Study of the Microstructure Semi Solid Al-Si-Mg Casting
Study of the Microstructure Semi Solid Al-Si-Mg Casting

Nawal Ezzat; Nada Taher Sultan

Volume 31, 1A , January 2013, Page 1-11

https://doi.org/10.30684/etj.31.1A.1

Abstract
  Semi-solid metal processing involves processing metallic alloys between thesolidity and the liquidity. The microstructure must be non-dendritic and consist ofspheroids of solid in a ...  Read More ...
Creep Behavior in Fiber-Reinforced Epoxy (DGEBA) Composites
Creep Behavior in Fiber-Reinforced Epoxy (DGEBA) Composites

Lubna Ghalib

Volume 31, 1A , January 2013, Page 12-25

https://doi.org/10.30684/etj.2013.71192

Abstract
  The composite material was prepared by reinforcing the epoxy with E-glass fiber. The creep and flextural test were measured in this work for one and two layer of E-glass fiber with ...  Read More ...
Enhanced GA for Mobile Robot Path Planning Based on Links among Distributed Nodes
Enhanced GA for Mobile Robot Path Planning Based on Links among Distributed Nodes

Mohamed Jasim Mohamed; Mustaffa waad Abbas

Volume 31, 1A , January 2013, Page 26-41

https://doi.org/10.30684/etj.2013.71193

Abstract
  In this paper, we propose an Enhanced Genetic Algorithm (EGA) to find the optimal path for a mobile robot. The workspace of the mobile robot is assumed to be of known environment with ...  Read More ...
Optimum Position of Shear Reinforcement of High-Strength Reinforced Concrete Beams
Optimum Position of Shear Reinforcement of High-Strength Reinforced Concrete Beams

Omar Qarani Aziz; Sinan Abdulkhaleq Yaseen

Volume 31, 1A , January 2013, Page 42-52

https://doi.org/10.30684/etj.2013.71247

Abstract
  This paper reports experimental data on the behavior and strength of high-strength concrete slender beams reinforced with vertical shear reinforcement. Tests were conducted on ten reinforced ...  Read More ...
Investigation the Redistribution Stresses in Fibre Composite Materials Due to Break in Non-Uniform Fibre
Investigation the Redistribution Stresses in Fibre Composite Materials Due to Break in Non-Uniform Fibre

Luay S. Al-Ansari; Ameen A. Nassar; Zainab M. Jassim

Volume 31, 1A , January 2013, Page 53-65

https://doi.org/10.30684/etj.2013.71248

Abstract
  In this research, the effect of break in a composite material containing one fibre with non-uniform cross section area was investigated depending on Nearest Neighboring Load Theory. ...  Read More ...
Thermal Performance of Film Cooling for Two Staggered Rows of Circular Jet
Thermal Performance of Film Cooling for Two Staggered Rows of Circular Jet

Assim H. Yousif; Amer M. Al-Dabagh; Muwafag Sh. Alwan

Volume 31, 1A , January 2013, Page 66-80

https://doi.org/10.30684/etj.2013.71249

Abstract
  The holes orientation and jet inclination angles are important parameters that control the development of the flow structures and the penetration and spreading of the jets. Experimental ...  Read More ...
Effect of Addition Carbon And Glass Fibers On Bond Strength of Steel Reinforcement and Normal Concrete
Effect of Addition Carbon And Glass Fibers On Bond Strength of Steel Reinforcement and Normal Concrete

Rana Hashim Ghedan

Volume 31, 1A , January 2013, Page 81-97

https://doi.org/10.30684/etj.2013.71250

Abstract
  The concept of composite materials using fibers as reinforcement is not new. The aim of composing materials is to improve some properties of the original materials. In civil engineering, ...  Read More ...
Graphical and Energy Pattern Factor Methods for Determination of the Weibull Parameters for Ali Algharbie Station, South East of Iraq
Graphical and Energy Pattern Factor Methods for Determination of the Weibull Parameters for Ali Algharbie Station, South East of Iraq

Amani Ibraheem Al-Tmimi

Volume 31, 1A , January 2013, Page 98-106

https://doi.org/10.30684/etj.2013.71251

Abstract
  The hourly mean wind speed data for Ali Algharbie station locations in south east of Iraq are collected and analyzed over a period of 1 year. The Data are fitted to the Weibull distribution ...  Read More ...
Mechanical Properties of Tempered Nanobainite Steel
Mechanical Properties of Tempered Nanobainite Steel

Dhafir S. Al-Fattal; Najmuldeen Y. Mahmood

Volume 31, 1A , January 2013, Page 107-119

https://doi.org/10.30684/etj.2013.71252

Abstract
  The mechanical properties of 62 SiMnCr 4 steel transformed isothermally at 280ºC for 5-hours were investigated. The hardness of nanobainite steel was equivalent to tempered martensite ...  Read More ...
Solutions for Water Hammer Phenomenon in the Low Lift Pump Station Located on Tigris River
Solutions for Water Hammer Phenomenon in the Low Lift Pump Station Located on Tigris River

Afreen emad

Volume 31, 1A , January 2013, Page 120-131

https://doi.org/10.30684/etj.2013.71253

Abstract
  The goal of this research is to find the proper solutions of curing the water hammer which the suddenly shutdown of the electricity that supply the power to the pumps occurs it, where ...  Read More ...
Bacterial Foraging Optimization Algorithm (BFOA) to Simulate Thermal Distribution in Yb:YAG Laser Thin Disk
Bacterial Foraging Optimization Algorithm (BFOA) to Simulate Thermal Distribution in Yb:YAG Laser Thin Disk

Mohammed A.Minshed

Volume 31, 1A , January 2013, Page 132-155

https://doi.org/10.30684/etj.2013.71254

Abstract
  There is a strong need for an optimized management of the thermal problem in Yb:YAG laser rod and for a powerful, fast, and accurate modeling tool capable of treating the heat source ...  Read More ...
A Numerical and Experimental Study of Steam Condenser Working with Modified Rankine Cycle
A Numerical and Experimental Study of Steam Condenser Working with Modified Rankine Cycle

Hisham Hassan Jasim

Volume 31, 1A , January 2013, Page 156-171

https://doi.org/10.30684/etj.2013.71255

Abstract
  A Numerical and experimental study of thermal and heat transfer processes in a steam condenser operating in steam power plant with steam engine was developed to built analytical model ...  Read More ...
Experimental Study of Heat Transfer Coefficients of Shell and Helically Coiled Tube Heat Exchangers
Experimental Study of Heat Transfer Coefficients of Shell and Helically Coiled Tube Heat Exchangers

Sattar Jaber Habeeb Al-Jabair; Ammar A.Hussain.A.AL-taee

Volume 31, 1A , January 2013, Page 172-196

https://doi.org/10.30684/etj.2013.71256

Abstract
  This work presents an experimental study of the heat transfer coefficients of shell and helically coiled tube heat exchangers. Three heat exchangers with different coil pitches were ...  Read More ...
Building Program to Calculate the Statistical Information of the Concentrations of Metal Using GIS
Building Program to Calculate the Statistical Information of the Concentrations of Metal Using GIS

Tariq Naji Otaiwi; Hameed Sarhan Ismael

Volume 31, 1A , January 2013, Page 1-13

https://doi.org/10.30684/etj.2013.71257

Abstract
  This paper deals with building a program to deal with geographic information system files in the field of mineral concentrations of the materials. Where it is open shape file of all ...  Read More ...
A Comparison between Results of Compaction for Soil
A Comparison between Results of Compaction for Soil

Husam Hikmat Baqir

Volume 31, 1A , January 2013, Page 14-31

https://doi.org/10.30684/etj.2013.71258

Abstract
  Compaction test is one of the important laboratory tests to determine the soil characteristic properties , as well as standard penetration test is the standard field test for identifying ...  Read More ...