Effect of Orifice Shape and Bore-Area on Noise Attenuation in a Reactive Muffler
Effect of Orifice Shape and Bore-Area on Noise Attenuation in a Reactive Muffler

Muna S. Kassim; Ehsan S. Ameen; Hayder M. Mohammed

Volume 31, Issue 11 , July 2013, Page 2014-2029

https://doi.org/10.30684/etj.31.11A1

Abstract
  IC engines are a major source of noise pollution. Mufflers require specific design and construction. Considering various noise parameters produced by the engine,the conventional design ...  Read More ...
Mechanical Properties of Friction Stir Welded Aluminum Alloy with Butt and Lap Cases
Mechanical Properties of Friction Stir Welded Aluminum Alloy with Butt and Lap Cases

Nadhim M.Faleh

Volume 31, Issue 11 , July 2013, Page 2030-2038

https://doi.org/10.30684/etj.31.11A2

Abstract
  Mechanical properties were investigated in base and friction stir linear welds of 7075 aluminum alloy. Welding tools consist of a shoulder with a pin and with-out pin. This work addresses ...  Read More ...
Studying the Effect of Both Gas Oil and Diesel Fuel on Polypropylene-Polycarbonate Reinforcement with Carbon Black
Studying the Effect of Both Gas Oil and Diesel Fuel on Polypropylene-Polycarbonate Reinforcement with Carbon Black

Najat J. Saleh; Abbas A. Jawad

Volume 31, Issue 11 , July 2013, Page 2039-2054

https://doi.org/10.30684/etj.31.11A3

Abstract
  In the present research, the diffusion of prepared sample blends (PP/PC) unfilled-filled with different amounts of carbon black (2 – 7) wt% and at different temperatures (25oC, ...  Read More ...
A Design Study and Performance Prediction of an Internal Compression Supersonic Air Intake
A Design Study and Performance Prediction of an Internal Compression Supersonic Air Intake

Bahjat Hassan Alyas

Volume 31, Issue 11 , July 2013, Page 2055-2075

https://doi.org/10.30684/etj.31.11A4

Abstract
  The aim of this research is to carryout a design study on a variable geometry rectangular supersonic air-intake at different flight conditions. The design of the air-intake at supersonic ...  Read More ...
Accuracy Assessment of 2D and 3D Geometric Correction Models for Different Topography in Iraq
Accuracy Assessment of 2D and 3D Geometric Correction Models for Different Topography in Iraq

Abdul Razzak T. Ziboon; Israa H. Mohammed

Volume 31, Issue 11 , July 2013, Page 2076-2085

https://doi.org/10.30684/etj.31.11A5

Abstract
  In recent decades, Remote sensing data becomes one of the basic information required for mapping and different applications in geomatics. In this research, different mathematical models ...  Read More ...
Design and Implementation of MC-CDMA Technique Using FPGA
Design and Implementation of MC-CDMA Technique Using FPGA

il A. H. Hadi; Layla Hattim Abood

Volume 31, Issue 11 , July 2013, Page 2085-2097

https://doi.org/10.30684/etj.31.11A6

Abstract
  Multicarrier Code Division Multiple Access (MC-CDMA) is attractive technique for high speed wireless data transmission; it's a combination of Orthogonal Frequency Division Multiplexing ...  Read More ...
Drinking Water Quality for Al-Mustansiriya University
Drinking Water Quality for Al-Mustansiriya University

Faaeza Ahmed Abd Al-Kareem

Volume 31, Issue 11 , July 2013, Page 2098-2115

https://doi.org/10.30684/etj.31.11A7

Abstract
  The aim of the research is to study water quality in Al-Mustansiriya university, which is supplied by water through a4 inch diameter pipe, water collected in a very old ground tank ...  Read More ...
Design and Simulation of Optical Filter for Dense Wavelength Division Multiplexing (DWDM) System
Design and Simulation of Optical Filter for Dense Wavelength Division Multiplexing (DWDM) System

Aseel Abdulameer Shakaty

Volume 31, Issue 11 , July 2013, Page 2116-2127

https://doi.org/10.30684/etj.31.11A8

Abstract
  In this paper, it is demonstrated, by means of simulations, the practical feasibility of an interference filter, implemented from a stack of high and low index birefringent thin films ...  Read More ...
PSO-FL Controller of Separately Excited DC Motor
PSO-FL Controller of Separately Excited DC Motor

Hawraa Q. Hameed

Volume 31, Issue 11 , July 2013, Page 2128-2140

https://doi.org/10.30684/etj.31.11A9

Abstract
  This paper presents an application of highbrid controller of a Separately Exited DC Motor (SEDM) using PSO-FL techniques. The controller is designed depending on fuzzy logic rules are ...  Read More ...
Real Time System Used to Improve the Production and Quality of Mushroom
Real Time System Used to Improve the Production and Quality of Mushroom

Omar Nameer M. Salim

Volume 31, Issue 11 , July 2013, Page 2141-2156

https://doi.org/10.30684/etj.31.11A10

Abstract
  Mushroom is one of agricultural products that are in increasing demand several folds in recent years so, mushroom cultivation represents important income source for farmers and countries. ...  Read More ...
Implementation of Golay Complementary Code Sequences Generator Based on FPGA
Implementation of Golay Complementary Code Sequences Generator Based on FPGA

Dhamyaa H. Mohammed

Volume 31, Issue 11 , July 2013, Page 2157-2165

https://doi.org/10.30684/etj.31.11A11

Abstract
  Golay sequences have some properties make it distinctive in the applications and results. However, for this distinction must select the code sequences carefully and accurately. Therefore, ...  Read More ...
Study of Short Cracks Growth Behavior for Duralumin 7075- T6 Enhanced by Artificial Ageing as Thermal and Chemical Treatments Under Rotating Bending Loading
Study of Short Cracks Growth Behavior for Duralumin 7075- T6 Enhanced by Artificial Ageing as Thermal and Chemical Treatments Under Rotating Bending Loading

Mustafa Sami Abdullateef

Volume 31, Issue 11 , July 2013, Page 2166-2182

https://doi.org/10.30684/etj.31.11A12

Abstract
  The fatigue life of ductile metals is controlled mainly by the propagation life of a short surface crack; to clarify the growth behavior of short cracks is crucial factor to the safe ...  Read More ...
Computer Simulation Using Fuzzy LogicModel to Predict Hot Corrosion Kinetics in Molten Salt of Steel-T21 Coated by Simultaneous Yttrium-Doped Aluminizing-Siliconizing Process
Computer Simulation Using Fuzzy LogicModel to Predict Hot Corrosion Kinetics in Molten Salt of Steel-T21 Coated by Simultaneous Yttrium-Doped Aluminizing-Siliconizing Process

Abbas Khammas Hussein

Volume 31, Issue 11 , July 2013, Page 2183-2197

https://doi.org/10.30684/etj.31.11A13

Abstract
  The present paper describes fuzzy logic simulation of an experimental study on the behavior of hot corrosion in molten salt (Na2SO4) of steel-T21 coated by simultaneous yttrium-doped ...  Read More ...
Formation of Compressive Residual Stresses by Shot Peening for Spot Welded Stainless Steel Plates
Formation of Compressive Residual Stresses by Shot Peening for Spot Welded Stainless Steel Plates

Ali H. Fahem; Samir Ali Al-Rabii; Ahmed Naif Al-Khazraji

Volume 31, Issue 11 , July 2013, Page 2198-2210

https://doi.org/10.30684/etj.31.11A14

Abstract
  In this paper, a stainless steel 316 was selected for this study and tested to obtain its chemical composition, mechanical properties and stress relieving. Then, two plates (55*55*1) ...  Read More ...
An Economic Importance for Using the Flat Plate Solar Receiver in a Single Effect Cooling System Operation
An Economic Importance for Using the Flat Plate Solar Receiver in a Single Effect Cooling System Operation

Hashim Abid Hussen

Volume 31, Issue 11 , July 2013, Page 149-168

https://doi.org/10.30684/etj.31.11A15

Abstract
  Today, an electric consumption on the cooling are increased and the sources of classical energy in words and in our country are decreased, in additional, the heat emission phenomena ...  Read More ...