On Use of Linear and Nonlinear Models to Measure Compressive Strength of Concrete Bearing
On Use of Linear and Nonlinear Models to Measure Compressive Strength of Concrete Bearing

Azhar Hadi Mahdi

Volume 30, Issue 4 , February 2012, Page 99-116

https://doi.org/10.30684/etj.30.4.15

Abstract
  Statistical and analysis researches are considered important in solving many problems, and taking suitable decisions, and sometimes predict incoming problems and solving them in near ...  Read More ...
Experimental Study of Simultaneous Heat and Mass Transfer in Falling Film and Bubble Mode (LiCl) Absorbers
Experimental Study of Simultaneous Heat and Mass Transfer in Falling Film and Bubble Mode (LiCl) Absorbers

Kamal M. Ahmad; Orooba .N. Abdullah; Mohammad F. Abid

Volume 30, Issue 4 , February 2012, Page 529-545

https://doi.org/10.30684/etj.30.4.1

Abstract
  The study involves lithium-Chloride absorption process for the falling film and bubble columns absorbers, working at the same operating conditions. The results obtained were used to ...  Read More ...
Preparation CuO and CuCO3Cu (OH) 2 Crystal Nano Particles by Using Microemulsion Method
Preparation CuO and CuCO3Cu (OH) 2 Crystal Nano Particles by Using Microemulsion Method

Sabiha Jabbar Beden; Hassan Ismail Dumbous; Kassim Mohammed Sahan

Volume 30, Issue 4 , February 2012, Page 546-555

https://doi.org/10.30684/etj.30.4.2

Abstract
  A microemulsion method for preparing colloidal copper nanoparticles in microemulsion is reported. The obtained copper carbonate CuCO3⋅Cu(OH)2 nanoparticle and copper oxide CuO ...  Read More ...
The Influence of Friction Stir Welding and Process Parameters on the Static and Dynamic Mechanical Properties of 2024-T3 Aluminum Alloy Weldments
The Influence of Friction Stir Welding and Process Parameters on the Static and Dynamic Mechanical Properties of 2024-T3 Aluminum Alloy Weldments

Nameer A.Hamoody; Moneer H.Tolephih; Shaker S. Hassan

Volume 30, Issue 4 , February 2012, Page 556-567

https://doi.org/10.30684/etj.30.4.3

Abstract
  The present work is aimed to study the friction stir welding and process for the aluminum alloy 2024-T3, a threaded pin with a diameter of 6 mm and a concaved shoulder of 18 mm welding ...  Read More ...
Improvement of Sabkha Soil by Using Geomesh and Addition of Polycoa
Improvement of Sabkha Soil by Using Geomesh and Addition of Polycoa

Hassan Obaid Abbas

Volume 30, Issue 4 , February 2012, Page 568-576

https://doi.org/10.30684/etj.30.4.4

Abstract
  Sabkha soil is a rich soil with salt deposited which result from evaporation of water, it is one of the many types of collapsible soils and in turn is one of the many types of problematic ...  Read More ...
Impact of decreasing polynomial degree in time needed to factor a 100 digits integer by General Number field sieve algorithm
Impact of decreasing polynomial degree in time needed to factor a 100 digits integer by General Number field sieve algorithm

Jamal A. Othman

Volume 30, Issue 4 , February 2012, Page 577-590

https://doi.org/10.30684/etj.30.4.5

Abstract
  Factoring is very important in the field of cryptography, specifically in the Rivest, Shamir, Adleman(RSA) public-key cryptosystem, one of the most prevalent methods for transmitting ...  Read More ...
Expermential Study of the Performance of Fluorescence Collector
Expermential Study of the Performance of Fluorescence Collector

Hussein A. Hadi; Saad T. Hamidi; Ali A. Abdulminaem

Volume 30, Issue 4 , February 2012, Page 591-604

https://doi.org/10.30684/etj.30.4.6

Abstract
  The luminescent concentrator which used consisting of organic fluorescence dyes such as Rhodamine 6G doped in article Polyvinyl alcohol (PVA) to configure a specific membrane thickness, ...  Read More ...
Hiding Encrypted Color Image within MPEG-2 Video
Hiding Encrypted Color Image within MPEG-2 Video

Firas A. Abdul Latef; Alaa A. Abdul Latef

Volume 30, Issue 4 , February 2012, Page 605-614

https://doi.org/10.30684/etj.30.4.7

Abstract
  In any communication, security is the most important issue in today’s world. Lots of data security and data hiding algorithms have been developed in the last decade. Hiding data ...  Read More ...
Color Texture Classification Using Adaptive Discrete Multiwavelets Transform
Color Texture Classification Using Adaptive Discrete Multiwavelets Transform

Matheel Emad El-Deen Abdulmunim

Volume 30, Issue 4 , February 2012, Page 615-627

https://doi.org/10.30684/etj.30.4.8

Abstract
  The classification of textures images has attracted the attention of many researchers. The multiscale techniques for gray level texture analysis have been intensively studied. In this ...  Read More ...
Etching Rate Enhancement of Porous Silicon Produced by Lasers
Etching Rate Enhancement of Porous Silicon Produced by Lasers

Mohammed A. Ibrahem

Volume 30, Issue 4 , February 2012, Page 628-633

https://doi.org/10.30684/etj.30.4.9

Abstract
  Two laser systems work with different operational modes have been used to produce silicon nanostructure surfaces. Pulsed Nd:YAG laser has been employed to produce silicon textured surface ...  Read More ...
Numerical Solution of Linear Delay Fredholm Integral Equations by using Homotopy Perturbation Method
Numerical Solution of Linear Delay Fredholm Integral Equations by using Homotopy Perturbation Method

Shymaa Hussain Salih; Israa Hadi Hassan; Fuad A. Al Heety

Volume 30, Issue 4 , February 2012, Page 634-643

https://doi.org/10.30684/etj.30.4.10

Abstract
  The main purpose of this work is to propose the Homotopy perturbation method for solving first type Linear Delay Fredholm Integral Equations (LDFIE).A Comparison between the numerical ...  Read More ...
A Novel Initial Rotor-Position Estimation Method for Switched Reluctance Motors Based on Frequency Measurement
A Novel Initial Rotor-Position Estimation Method for Switched Reluctance Motors Based on Frequency Measurement

Hosham Salim; Abduljabbar Owaid Hanfesh

Volume 30, Issue 4 , February 2012, Page 644-658

https://doi.org/10.30684/etj.30.4.11

Abstract
  This paper presents a novel method which is designed to detect the rotor position at standstill and also low speeds in switched reluctance motor (SRM). In this paper the inductance ...  Read More ...
Determinants of E-Learning Implementation Success In The Iraqi MoHE
Determinants of E-Learning Implementation Success In The Iraqi MoHE

Jalal B. Raouf; Inam Seger Naser; Bushraa Khireibut Jassim

Volume 30, Issue 4 , February 2012, Page 659-671

https://doi.org/10.30684/etj.30.4.12

Abstract
  The aim of this paper is to investigate the determinants of implementation success of the E-Learning in the Iraqi Ministry of Higher Education (IMoHE) and put a work plan to make the ...  Read More ...
Mechanical and Tribological Behavior of Glass- Polyester Composite System under Graphite Filler Content
Mechanical and Tribological Behavior of Glass- Polyester Composite System under Graphite Filler Content

Farag M. Mohammed; Drai A. Smait

Volume 30, Issue 4 , February 2012, Page 672-683

https://doi.org/10.30684/etj.30.4.13

Abstract
  Experimental investigations had been done in this work to demonstrate the effect of graphite filler contents on the mechanical and tribological behavior of (30% volume fraction) glass-polyester ...  Read More ...
Corrosion Inhibition of Aluminum Alloy 7613 by Dimethylethanolamin in (0.6 M) NaCl Solution
Corrosion Inhibition of Aluminum Alloy 7613 by Dimethylethanolamin in (0.6 M) NaCl Solution

Khalid T. Rashid

Volume 30, Issue 4 , February 2012, Page 684-696

https://doi.org/10.30684/etj.30.4.14

Abstract
  The inhibition behavior of Dimethylethanolamin (DMEA) on corrosion 7613 Aluminum alloy in 0.6 M NaCl solution have been investigated using weight loss, polarization techniques .Five ...  Read More ...