Developing an Approach to Redesign Freeform Surfaces Using B-Spline Technique
Developing an Approach to Redesign Freeform Surfaces Using B-Spline Technique

Amjad B. Adulghafour; Ahmed T. Hassan

Volume 36, 12A , December 2018, Page 1213-1221

https://doi.org/10.30684/etj.36.12A.1

Abstract
  In product design process trends currently tend to use sculpture surface (freeform surface) that modeling by using (NURBS, B-spline, Bezier) technique to suit aesthetic, functional ...  Read More ...
Comparison Between Deterministic and Stochastic Interpolation Methods for Predicting Ground Water Level in Baghdad
Comparison Between Deterministic and Stochastic Interpolation Methods for Predicting Ground Water Level in Baghdad

Muammar H. Ali; Aqeel Sh. Al-Adili; Nagaratnam Sivakugan

Volume 36, 12A , December 2018, Page 1222-1225

https://doi.org/10.30684/etj.36.12A.2

Abstract
  Surface interpolation techniques are usually used to create continuous data (i.e. raster data) from distributed set of point data over a geographical region. There are deterministic ...  Read More ...
Mechanical Properties Modeling and Optimization for Polymeric Matrix Hybrid Bio Composite for Scaffolds Application
Mechanical Properties Modeling and Optimization for Polymeric Matrix Hybrid Bio Composite for Scaffolds Application

Jenan S. Kashan; Marwan N. Arbilei

Volume 36, 12A , December 2018, Page 1226-1235

https://doi.org/10.30684/etj.36.12A.3

Abstract
  TiO2 / Polypropylene composite considers very promising biomaterials in bone replacement and repair application, but mechanical properties still out of load bearing scaffolds application. ...  Read More ...
Investigation of The Effect of Loading Paths in the Tube Hydroforming Process
Investigation of The Effect of Loading Paths in the Tube Hydroforming Process

Adil. Sh. Jaber

Volume 36, 12A , December 2018, Page 1236-1243

https://doi.org/10.30684/etj.36.12A.4

Abstract
  The control accurately of internal pressure, axial feeding and paths of loading which have important influences on the final tube quality. In this research an impact of loading path ...  Read More ...
Study of the Mechanical Properties of Jute Fiber Reinforced Cement Composites
Study of the Mechanical Properties of Jute Fiber Reinforced Cement Composites

Lamees S. Faiq

Volume 36, 12A , December 2018, Page 1244-1248

https://doi.org/10.30684/etj.36.12A.5

Abstract
  The study results show the use of jute fibers to develop a low cost material for wall panels, roofs and other construction board. The study has been investigates the cement mechanical ...  Read More ...
Robust Multiple Model Adaptive Control for Dynamic Positioning of Quadrotor Helicopter System
Robust Multiple Model Adaptive Control for Dynamic Positioning of Quadrotor Helicopter System

Safanah M. Raafat; Zainab SH. Mahmoud

Volume 36, 12A , December 2018, Page 1249-1259

https://doi.org/10.30684/etj.36.12A.6

Abstract
  The quadrotor control has been one of the benchmark control problems. It is considered as an under-actuated, multivariable and high nonlinear system due to its dynamics, having strong ...  Read More ...
Resistance of High-Volume Fly Ash Self-Compacting Concrete to Internal Sulfate Attack
Resistance of High-Volume Fly Ash Self-Compacting Concrete to Internal Sulfate Attack

Tareq S. Al-Attar; Ahmed A. Taha

Volume 36, 12A , December 2018, Page 1260-1266

https://doi.org/10.30684/etj.36.12A.7

Abstract
  This paper investigates the durability of high-volume Fly ash self-compacting concrete, HVFASCC that exposed to internal sulfate attack. At the present work, HVFASCC was produced with ...  Read More ...
Experimental and Numerical Study of the Earing Defect During Square Deep Drawing Process
Experimental and Numerical Study of the Earing Defect During Square Deep Drawing Process

Kariem M. Younis; Adil. Sh. Jaber

Volume 36, 12A , December 2018, Page 1267-1275

https://doi.org/10.30684/etj.36.12A.8

Abstract
  Deep drawing process is a very complex process which controls a lot of parameters and the associated defects. The aims of this research are to discuss the effect of parameters of the ...  Read More ...
Investigation Vibration Damping in the Hydraulic Systems by Using an Accumulator
Investigation Vibration Damping in the Hydraulic Systems by Using an Accumulator

Walaa M. Hashim; Huda A. Al-Salihi; Hisham A. Hoshi

Volume 36, 12A , December 2018, Page 1267-1282

https://doi.org/10.30684/etj.36.12A.9

Abstract
  It is generally accepted that the vibration of fluid power systems considered to be one of the major problems that is normally occurred in the hydraulic system, which causes a noise ...  Read More ...
Some Mechanical Properties of Polymer Matrix Composites Reinforced by Nano Silica Particles and Glass Fibers
Some Mechanical Properties of Polymer Matrix Composites Reinforced by Nano Silica Particles and Glass Fibers

Sudad Younis; Jawad K. Oleiwi; Reem A. Mohammed

Volume 36, 12A , December 2018, Page 1283-1289

https://doi.org/10.30684/etj.36.12A.10

Abstract
  This research studied the effect of nano silica particles on wear behavior test , ultimate tensile strength ,impact strength, fracture toughness and hardness shore D of specimens composite ...  Read More ...
A Simplified Recurrent Neural Network Trained by Gbest-Guided Gravitational Search Algorithm to Control Nonlinear Systems
A Simplified Recurrent Neural Network Trained by Gbest-Guided Gravitational Search Algorithm to Control Nonlinear Systems

Omar F. Lutfy; Ahmed L. Jassim

Volume 36, 12A , December 2018, Page 1290-1301

https://doi.org/10.30684/etj.36.12A.11

Abstract
  This paper presents a feedback control strategy using a Simplified Recurrent Neural Network (SRNN) for nonlinear dynamical systems. As an enhancement for a previously reported modified ...  Read More ...
Formation Control of Mobile Robots Using Sliding Mode Control Based on Conditional Servocompensator
Formation Control of Mobile Robots Using Sliding Mode Control Based on Conditional Servocompensator

Laith Khames Majeed

Volume 36, 12A , December 2018, Page 1302-1310

https://doi.org/10.30684/etj.36.12A.12

Abstract
  In this paper, the problem of controlling a group of mobile robots is considered; each one operates with the nonlinear nonholonomic under actuated dynamics. A coordinated control scheme ...  Read More ...