Research Paper
Influence of Recycled Fine Aggregates on Strength Properties of Reactive Powder Mortar
Influence of Recycled Fine Aggregates on Strength Properties of Reactive Powder Mortar

Doaa H. Nayyef; Shatha S. Hasan

Volume 38, 3A , March 2020, Page 288-294

https://doi.org/10.30684/etj.v38i3A.265

Abstract
  Although many researchers have done many studies on recycled aggregate concrete, information is very little about the influence of utilizing recycled aggregate in the production of ...  Read More ...
Investigation of the Effect of Nano Powder Mixed Dielectric on EDM Process
Investigation of the Effect of Nano Powder Mixed Dielectric on EDM Process

Rasha R. Elias

Volume 38, 3A , March 2020, Page 295-307

https://doi.org/10.30684/etj.v38i3A.337

Abstract
  In this paper, Artificial Neural Network was adopted to predict the effect of current, the concentration of aluminum oxide (Al2O3) and graphite Nanopowders in dielectric fluid for the ...  Read More ...
Improved Wear Rate Resistance, Compression Strength and Hardness of Polymethylmethacrylate Resin with Orange Peel Powder for Artificial Denture Base
Improved Wear Rate Resistance, Compression Strength and Hardness of Polymethylmethacrylate Resin with Orange Peel Powder for Artificial Denture Base

Reem A. Mohammed

Volume 38, 3A , March 2020, Page 308-318

https://doi.org/10.30684/etj.v38i3A.341

Abstract
  The material utilized for manufacturing artificial dentures should have high-grade mechanical properties in order to resist heavy forces inside the mouth. This study includes investigation ...  Read More ...
Improving the Stability and Critical Speed of Rotor Bearing System By Using External Damping Source
Improving the Stability and Critical Speed of Rotor Bearing System By Using External Damping Source

Tariq M. Hammza; Nassear R. Hmoad; Ehab N. Abas

Volume 38, 3A , March 2020, Page 319-324

https://doi.org/10.30684/etj.v38i3A.344

Abstract
  Improving the essential factors of rotor bearing system are the aim of this study. In addition to the presence of two ball bearings to support the rotor, two additional fluid film journal ...  Read More ...
Effect of Laser Shock Peening on Fatigue Stress Concentration of Polyester Reinforced by Al-Micro Powder Composites
Effect of Laser Shock Peening on Fatigue Stress Concentration of Polyester Reinforced by Al-Micro Powder Composites

Ahmed N. Al- Khazraji; Ammar A. Mutasher

Volume 38, 3A , March 2020, Page 325-334

https://doi.org/10.30684/etj.v38i3A.345

Abstract
  Laser shock peening is a widely common process for materials treatment and typically used for fatigue strength enhancement especially for metals. In this paper, its effect on polymeric ...  Read More ...
Production of Self-Cleaning SiO2/CNT Nanoparticles Substituted Cement Mortar
Production of Self-Cleaning SiO2/CNT Nanoparticles Substituted Cement Mortar

Layth Al-Gebory; Aseel B. Al‐Zubaidi; Ahmed A. Al‐Tabbakh

Volume 38, 3A , March 2020, Page 335-342

https://doi.org/10.30684/etj.v38i3A.349

Abstract
  Manufacturing of building materials with unique properties is one of the most important key-parameters in the development of construction engineering and building materials. The development ...  Read More ...
Development of Path Planning Algorithm Using Probabilistic Roadmap Based on Ant Colony Optimization
Development of Path Planning Algorithm Using Probabilistic Roadmap Based on Ant Colony Optimization

Mohammed I. Abdulakareem; Firas A. Raheem

Volume 38, 3A , March 2020, Page 343-351

https://doi.org/10.30684/etj.v38i3A.389

Abstract
  In this paper, a unique combination among probabilistic roadmap, ant colony optimization, and third order B-spline curve has been proposed to solve path-planning problem in complex ...  Read More ...
Air Temperature Modelling Depended on Remote Sensing Techniques
Air Temperature Modelling Depended on Remote Sensing Techniques

Zainab T. Mohammed; Riyad H. Al-Anbari; Oday Z. Jasim

Volume 38, 3A , March 2020, Page 352-360

https://doi.org/10.30684/etj.v38i3A.398

Abstract
  Air temperature (T air) near the land surface is a fundamental descriptor of physical environmental conditions and one of the most widely used climatic variables in global change studies. ...  Read More ...
Design and Implementation of a Fuzzy Logic Controller for Inverted Pendulum System Based on Evolutionary Optimization Algorithms
Design and Implementation of a Fuzzy Logic Controller for Inverted Pendulum System Based on Evolutionary Optimization Algorithms

Ahmed F. Ghaliba; Ahmed A. Oglah

Volume 38, 3A , March 2020, Page 361-374

https://doi.org/10.30684/etj.v38i3A.400

Abstract
  The inverted pendulum is a standard classical problem in the branch ofcontrol and systems. If a cart is bushed by force then its position and angleof the pendulum will be changed. Several ...  Read More ...
Study of the Corrosion Behavior of Zinc-Aluminum Alloy Matrix Composite Reinforced with Nanosilica Produced by Stir Casting
Study of the Corrosion Behavior of Zinc-Aluminum Alloy Matrix Composite Reinforced with Nanosilica Produced by Stir Casting

Fatima A. Adnana; Niveen J. Abdul Kader; Mohammed S. Hamza

Volume 38, 3A , March 2020, Page 375-382

https://doi.org/10.30684/etj.v38i3A.435

Abstract
  In this investigation, Zn-Al alloy metal-matrix nano composites thatreinforced via various weight percentages (2%, 4%, 6%, and 8%) ofnanosilica (SiO2) particles were fabricated applying ...  Read More ...
Analysis of Thermal and Insulation Performance of Double Glazed Window Doped With Paraffin Wax
Analysis of Thermal and Insulation Performance of Double Glazed Window Doped With Paraffin Wax

Jalal M. Jalil; Salih M. Salih

Volume 38, 3A , March 2020, Page 383-393

https://doi.org/10.30684/etj.v38i3A.448

Abstract
  In this paper, a numerical investigation has been performed to study the effect of varying the thermal properties of the paraffin wax on the performance of a double glazed window doped ...  Read More ...
Influence of Cutting Speed on Residual Stresses by Machining of AISI 316L
Influence of Cutting Speed on Residual Stresses by Machining of AISI 316L

Safa M. Lafta; Maan A. Tawfiq

Volume 38, 3A , March 2020, Page 394-401

https://doi.org/10.30684/etj.v38i3A.459

Abstract
  RS have an important role in the performance of components and machined structures. The objective of this paper is to study the influence of cutting speed on RS in workpieces that are ...  Read More ...
Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs
Reducing Roof Solar Heat Gain by Using Double-Skin Ventilated Roofs

Mohannad R. Ghanim; Sabah T. Ahmed

Volume 38, 3A , March 2020, Page 402-411

https://doi.org/10.30684/etj.v38i3A.462

Abstract
  Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate ...  Read More ...
Kinematics Analysis of 5 DOF Robotic Arm
Kinematics Analysis of 5 DOF Robotic Arm

Tahseen F. Abaas; Ali A. Khleif; Mohanad Q. Abbood

Volume 38, 3A , March 2020, Page 412-422

https://doi.org/10.30684/etj.v38i3A.475

Abstract
  This paper presents the forward, inverse, and velocity kinematics analysis of a 5 DOF robotic arm. The Denavit-Hartenberg (DH) parameters are used to determination of the forward kinematics ...  Read More ...
Comparative Study of Different Organic Molecules as an Anti-Corrosion for Mild Steel in Kerosene
Comparative Study of Different Organic Molecules as an Anti-Corrosion for Mild Steel in Kerosene

Eva A. Yaqo; Rana A. Anaee; Majid H. Abdulmajeed

Volume 38, 3A , March 2020, Page 423-430

https://doi.org/10.30684/etj.v38i3A.507

Abstract
  The investigation on the efficiency of three organic derivatives was done as inhibitors for carbon steel using electrochemical methods at four temperatures (303, 313, 323, and 333 K) ...  Read More ...
Multiwall Carbon Nanotube / Polyvinyl Alcohol Nanofibers Film, Electrical Conductivity Improvement
Multiwall Carbon Nanotube / Polyvinyl Alcohol Nanofibers Film, Electrical Conductivity Improvement

Akram R. Jabur

Volume 38, 3A , March 2020, Page 431-439

https://doi.org/10.30684/etj.v38i3A.530

Abstract
  Conductive polymer films were prepared of polyvinyl alcohol (PVA) with (0, 2, 4, 6, 8, and 10) wt. % multiwalled carbon nanotubes (MWCNTs) by electrospinning technique. The morphologies ...  Read More ...
Diffraction Rings Pattern and Nonlinear Optical Properties of Hybrid ZnO-NPs / Epoxy Resin
Diffraction Rings Pattern and Nonlinear Optical Properties of Hybrid ZnO-NPs / Epoxy Resin

Zahraa M. AL-Asady; Ali H. AL-Hamdani

Volume 38, 3A , March 2020, Page 440-445

https://doi.org/10.30684/etj.v38i3A.549

Abstract
  In this research, the diffraction ring patterns scan and single-beam Z-scan techniques were used to measure the nonlinear refractive index (n2) and nonlinear absorption coefficient ...  Read More ...
Discontinuous Control and Stability Analysis of Step-Down DC-DC Voltage Converters
Discontinuous Control and Stability Analysis of Step-Down DC-DC Voltage Converters

Bashar F. Midhat

Volume 38, 3A , March 2020, Page 446-456

https://doi.org/10.30684/etj.v38i3A.567

Abstract
  Step down DC-DC converters are power electronic circuits, which mainly used to convert voltage from a level to a lower level. In this paper, a discontinuous controller is proposed as ...  Read More ...
Characteristics of Exhaust Emissions for a Diesel Engine Fuelled by Corn Oil Biodiesel and Blended with Diesel Fuel
Characteristics of Exhaust Emissions for a Diesel Engine Fuelled by Corn Oil Biodiesel and Blended with Diesel Fuel

Abdulrahman S. Mahmood; Haqi I. Qatta; Saadi M.D. Al-Nuzal; Talib K. Abed

Volume 38, 3A , March 2020, Page 457-464

https://doi.org/10.30684/etj.v38i3A.446

Abstract
  Environmentally friend biodiesel fuel from corn oil was tested in single-cylinder 4-stroke diesel engine operated. Three blends of fuels were prepared from corn oil and diesel fuel ...  Read More ...
Cyclic Settlement of Footings of Different Shapes Resting on Clayey Soil
Cyclic Settlement of Footings of Different Shapes Resting on Clayey Soil

Aseel N. Najim; Mohammed Y. Fattah; Makki K. Al-Recaby

Volume 38, 3A , March 2020, Page 465-477

https://doi.org/10.30684/etj.v38i3A.483

Abstract
  An experimental investigation is carried out to investigate the impact of the footing shape, when rested on clayey soil under cyclic loading condition. The model footings used in this ...  Read More ...