Research Paper
Numerical Study of Bond Stress-Slip Relationship in Large Scale Reactive Powder Concrete Beams
Numerical Study of Bond Stress-Slip Relationship in Large Scale Reactive Powder Concrete Beams

Eyad K. Sayhood; Sameh B. Tobeia; Ammar A. Ali

Volume 37, 12A , December 2019, Page 496-505

https://doi.org/10.30684/etj.37.12A.1

Abstract
  As the reactive powder concrete (RPC) represents one of the ultra-high performance concrete types that recently used in public works and in the presence of several attempts that aims ...  Read More ...
Research Paper
Influence of Steel Fiber and Spacing of Stirrups on the Torsion Capacity of Hybrid Beams
Influence of Steel Fiber and Spacing of Stirrups on the Torsion Capacity of Hybrid Beams

Alyaa H. Mohammed; Qais A. Hasan; Kaiss F. Sarsam

Volume 37, 12A , December 2019, Page 506-511

https://doi.org/10.30684/etj.37.12A.2

Abstract
  This paper investigates experimentally the torsional behaviour of hybrid reinforced concrete beams composed of reactive powder concrete (RPC) at the outer edges of the cross-section ...  Read More ...
Research Paper
Experimental Study of Vibration on Pipe Conveying Fluid at Different End Conditions for Different Fluid Temperatures
Experimental Study of Vibration on Pipe Conveying Fluid at Different End Conditions for Different Fluid Temperatures

Kayser A. Ameen; Mustafa J. Al-Dulaimi; Ali A. Hatem

Volume 37, 12A , December 2019, Page 512-515

https://doi.org/10.30684/etj.37.12A.3

Abstract
  Dynamic behavior of a copper pipe conveying fluid at different fluid temperatures is investigated experimentally. Three types of supports are used, which are simply support - simply ...  Read More ...
Research Paper
Numerical Investigations on Seismic Response of Structures under the Effect of Infinite Boundary of Soil-Structure Interaction
Numerical Investigations on Seismic Response of Structures under the Effect of Infinite Boundary of Soil-Structure Interaction

Qais A. Hasan; Saad F. Al-Wakel; Zahraa R. Zaidan

Volume 37, 12A , December 2019, Page 516-521

https://doi.org/10.30684/etj.37.12A.4

Abstract
  The damage caused by large earthquakes is not only due to structures but also due to the soil failure, where the dynamic response varies considerably from the fixed base state because ...  Read More ...
Research Paper
Study Compression, Hardness and Density properties of PMMA Reinforced by Natural Powder Used in Denture Base applications
Study Compression, Hardness and Density properties of PMMA Reinforced by Natural Powder Used in Denture Base applications

Jawad Oleiwi; Q. A. Hamad; N. N. Kadhim

Volume 37, 12A , December 2019, Page 522-527

https://doi.org/10.30684/etj.37.12A.5

Abstract
   This research had been done to investigate the effect of adding natural powder of Pistachio Shell to PMMA, which popularly used in denture applications. The powder added in different ...  Read More ...
Research Paper
The Synergic Effect of Fly Ash and High Reactivity Attapulgite in Ternary Blended Cement
The Synergic Effect of Fly Ash and High Reactivity Attapulgite in Ternary Blended Cement

Shubbar J. Al-Obaidey

Volume 37, 12A , December 2019, Page 528-535

https://doi.org/10.30684/etj.v37i12A.456

Abstract
  The main objective is to study the synergic effect of fly ash (FA) and high reactivity Attapulgite (HRA) together in ternary blended cement of (OPC+FA+HRA) and evaluate the efficiency ...  Read More ...
Research Paper
Effect of Weather Conditions on the Properties of Cement Rendering
Effect of Weather Conditions on the Properties of Cement Rendering

Ayad H. Mseer

Volume 37, 12A , December 2019, Page 536-541

https://doi.org/10.30684/etj.37.12A.7

Abstract
  The cement mortar used in rendering external walls, in Iraqi hot weather summer, suffers from appearance of many cracks on surface during and after its setting. So, this research aims ...  Read More ...
Research Paper
Design a Second Order Sliding Mode Controller for Electrical Servo Drive Systems
Design a Second Order Sliding Mode Controller for Electrical Servo Drive Systems

Shams A. Hashim; Ahmed K. Hamoudi

Volume 37, 12A , December 2019, Page 542-552

https://doi.org/10.30684/etj.37.12A.8

Abstract
  The aim of this paper is to design and study a powerful second-order sliding mode controller for electrical servo drive systems. The suggested controller can successfully overcome the ...  Read More ...
Research Paper
State Space Parallelization Method for a 16-Bit Turbo Encoder
State Space Parallelization Method for a 16-Bit Turbo Encoder

Maha A. Fleah; Qusay F. Al-Doori

Volume 37, 12A , December 2019, Page 553-557

https://doi.org/10.30684/etj.37.12A.9

Abstract
  Turbo codes are widely used in digital communication systems. Their ability to reach the Shannon channel capacity made it the choice for most of the communication systems. Due to the ...  Read More ...
Research Paper
Development of Surface Roughness and Mechanical Properties of PMMA Nanocomposites by Blending with Polymeric Materials
Development of Surface Roughness and Mechanical Properties of PMMA Nanocomposites by Blending with Polymeric Materials

Hussein M. Sadeq; Sihama I. Salih; Auda J. Braihi

Volume 37, 12A , December 2019, Page 558-565

https://doi.org/10.30684/etj.37.12A.10

Abstract
  This work aims to a development of mechanical properties of PMMA that is utilized in denture material, by using two types of polymers; blends (PMMA:2%NR) and (PMMA:2%SR) as a matrix ...  Read More ...
Research Paper
Enhancement of Surface Crack Density Produced by EDM Using Hybrid Machining
Enhancement of Surface Crack Density Produced by EDM Using Hybrid Machining

Saad K. Shather; Shukry H. Aghdeab; Waqass S. Khudier

Volume 37, 12A , December 2019, Page 566-573

https://doi.org/10.30684/etj.37.12A.11

Abstract
  The present work is aimed to improve the surface cracks density of electrical discharge machining (EDM) by Electrical Discharge Machining (EDM)/Electrochemical Machining (ECM) EDM/ECM ...  Read More ...
Research Paper
Design PID Neural Network Controller for Trajectory Tracking of Differential Drive Mobile Robot Based on PSO
Design PID Neural Network Controller for Trajectory Tracking of Differential Drive Mobile Robot Based on PSO

Mohamed J. Mohamed; Mohammed K. Hamza

Volume 37, 12A , December 2019, Page 574-583

https://doi.org/10.30684/etj.37.12A.12

Abstract
  This paper introduces a nonlinear (Proportional-Integral-Derivative Neural Network) (PID NN) controller for a differential wheeled mobile robot trajectory tracking problem. This neural ...  Read More ...
Evaluation of Predictive Equations for Local Pier Scour in Cohesive Soils
Evaluation of Predictive Equations for Local Pier Scour in Cohesive Soils

Zahraa F. Hassan; Ibtisam R. Karim; Abdul- Hassan K. Al-Shukur

Volume 37, 12A , December 2019, Page 584-591

https://doi.org/10.30684/etj.37.12A.436

Abstract
  Wavelet analysis has become a powerful tool for denoising images. It represents a new way to achieve better noise reduction and increased contrast. Here,  experimentally demonstrate ...  Read More ...