Bearings Health Monitoring Based on Frequency-Domain Vibration Signals Analysis
Bearings Health Monitoring Based on Frequency-Domain Vibration Signals Analysis

Saja M. Jawad; Alaa A. Jaber

Volume 41, Issue 1 , January 2023, , Page 86-95

https://doi.org/10.30684/etj.2022.131581.1043

Abstract
  Rotating machine health monitoring is critical for system safety, cost savings, and increased reliability. The need for a simple and accurate fault diagnosis method has led to the development ...  Read More ...
Dynamic Response Analysis of the Rotor Using the Jeffcott Method and Performance Improvement Using Active Magnetic Bearing
Dynamic Response Analysis of the Rotor Using the Jeffcott Method and Performance Improvement Using Active Magnetic Bearing

Karrar B. Tuaib; Qasim A. Atiyah; Imad A. Abdulsahib

Volume 41, Issue 1 , January 2023, , Page 96-109

https://doi.org/10.30684/etj.2022.133607.1196

Abstract
  The most common component of mechanical systems today is rotating machines. In these systems, vibration is caused by rotating components. As a result, to decrease the amplitude of vibrations ...  Read More ...
Optimization Process of Double Spots Welding of High Strength Steel Using in the Automotive Industry
Optimization Process of Double Spots Welding of High Strength Steel Using in the Automotive Industry

Hayder H. Khaleel; Ibtihal A. Mahmood; Fuad Khoshnaw

Volume 41, Issue 1 , January 2023, , Page 110-120

https://doi.org/10.30684/etj.2022.134325.1236

Abstract
  Resistance Spot Welding (RSW) is one of the most important welding techniques used in the automotive industry because it is an economic process and is suitable for many materials. Many ...  Read More ...
Effects of Magnetic Field on the Performance of Solar Distillers: A Review Study
Effects of Magnetic Field on the Performance of Solar Distillers: A Review Study

Wissam H. ِAlawee; Karrar A. Hammoodi; Hayder A. Dhahad; Z.M. Omara; Fadl A. Essa; A.S. Abdullah; M I. Amro

Volume 41, Issue 1 , January 2023, , Page 121-131

https://doi.org/10.30684/etj.2022.134576.1240

Abstract
  Due to the rising demand for treated water, the enhancement of potable water yield technologies, such as traditional solar distillers, is a pressing concern. Solar desalination is one ...  Read More ...
Numerical Simulation of Powering Turbofan Propulsion Aircraft with Electricity
Numerical Simulation of Powering Turbofan Propulsion Aircraft with Electricity

Thomas O. Onah; Christian C. Aka; Bethrand N. Nwankwojike

Volume 41, Issue 1 , January 2023, , Page 132-141

https://doi.org/10.30684/etj.2022.133963.1214

Abstract
  The gas turbine-based propulsion systems were responsible for the emission of pollutants that damage the ecosphere. Commercial aviation represented a large portion of carbon emissions ...  Read More ...
Determination of Impingement Cooling Fluid Temperature-Time Profile For Extracted Tiger-Nut Juice (Cyperus Esculentus) By Lumped Thermal Mass Analysis
Determination of Impingement Cooling Fluid Temperature-Time Profile For Extracted Tiger-Nut Juice (Cyperus Esculentus) By Lumped Thermal Mass Analysis

Nwankwo, Michael Azubuike; Onah Thomas Okechukwu; Egwuagu Michael Onyekachi

Volume 41, Issue 1 , January 2023, , Page 142-150

https://doi.org/10.30684/etj.2022.134483.1239

Abstract
  Determination of Temperature-Time Profile by the Lumped thermal mass analysis (LTMA) method using Tiger-Nut Juice as the impinging fluid on the cooling system was carried out. With ...  Read More ...
Determination of Draught Requirement of Single-furrow Mouldboard Plough in Sandy Loam Soil in Yola, Northeastern Nigeria
Determination of Draught Requirement of Single-furrow Mouldboard Plough in Sandy Loam Soil in Yola, Northeastern Nigeria

Kabri, H. U.

Volume 41, Issue 1 , January 2023, , Page 151-158

https://doi.org/10.30684/etj.2022.133807.1206

Abstract
  The draught requirement of a single-furrow animal-drawn mouldboard plough implement was determined on sandy loam soils from June to July 2021 at Modibbo Adama University, Yola. The ...  Read More ...
Investigation of Offshore Wind Turbine Structure Deflection Using Experimental Work, Numerical, and Theoretical Approach
Investigation of Offshore Wind Turbine Structure Deflection Using Experimental Work, Numerical, and Theoretical Approach

Hayder M. Ali; Hassan M. Alwan; Israa Al-Esbe; Kochneva O. V

Volume 41, Issue 1 , January 2023, , Page 159-175

https://doi.org/10.30684/etj.2022.133645.1199

Abstract
  Electrical energy from offshore wind turbines is an important source of clean, renewable energy production. One of the reasons for the low efficiency of wind turbines is the change ...  Read More ...
Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow
Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

Nassr F. Hussein; Sabah T. Ahmed; Ali L. Ekaid

Volume 41, Issue 1 , January 2023, , Page 176-184

https://doi.org/10.30684/etj.2022.135475.1274

Abstract
  The present work studied the influence of pulsating flow as an active method on the thermal performance of a double-pass solar air heater with a tubular solar absorber. A ball valve ...  Read More ...
Thermoelectric Generators as a Heat Recovery System for Exhaust Gases of Vehicles Driving at Low Speeds
Thermoelectric Generators as a Heat Recovery System for Exhaust Gases of Vehicles Driving at Low Speeds

A. Al-Janabi; O. Al Salmi; E. Al Subhi; A. Al Hadhrami

Volume 41, Issue 1 , January 2023, , Page 185-195

https://doi.org/10.30684/etj.2022.134206.1253

Abstract
  To save the environment and utilize the waste heat associated with exhaust gases of internal combustion engines, it is crucial to design an efficient system that can recover this heat ...  Read More ...
Omnidirectional Mobil Robot with Navigation Using SLAM
Omnidirectional Mobil Robot with Navigation Using SLAM

Hiba A. Najim; Iman S. Kareem; Wisam E. Abdul-Lateef

Volume 41, Issue 1 , January 2023, , Page 196-202

https://doi.org/10.30684/etj.v41i1.2252

Abstract
  As mobile robots have become widespread in indoor environments with narrow and crowded corridors, such as institutions, the demand for mobile robots has recently increased, especially ...  Read More ...
Experimental Study Convection Heat Transfer Inside the Triangular Duct Filled with Porous Media
Experimental Study Convection Heat Transfer Inside the Triangular Duct Filled with Porous Media

Sabah R. Mahdi; Suhad A. Rasheed

Volume 41, Issue 1 , January 2023, , Page 203-217

https://doi.org/10.30684/etj.2022.136144.1297

Abstract
  Convection heat transfer inside an empty triangular channel when filled with porous media heated proportionally with a constant heat flux (1300 W/m²) at the Reynolds number range ...  Read More ...
The Effect of Rectangular Grooves on the Lubrication Mechanism in an Inclined Slider Bearing
The Effect of Rectangular Grooves on the Lubrication Mechanism in an Inclined Slider Bearing

Muhannad M.Mrah; Ammar S.Hamid

Volume 41, Issue 1 , January 2023, , Page 218-231

https://doi.org/10.30684/etj.2022.136148.1299

Abstract
  This research aims to study the effect of rectangular grooves on the lubrication mechanism in an inclined slider bearing. Reynolds' equation was used in the theory part to calculate ...  Read More ...
The Effect of Eichhornia Crassipes Biodiesel/LPG Dual-Fuel on Performance and Emissions in a Single-Cylinder Compression Ignition Engine
The Effect of Eichhornia Crassipes Biodiesel/LPG Dual-Fuel on Performance and Emissions in a Single-Cylinder Compression Ignition Engine

Hawraa S. Mohammed; Mahmoud A. Mashkour

Volume 41, Issue 1 , January 2023, , Page 232-242

https://doi.org/10.30684/etj.2022.135176.1266

Abstract
  This study investigates the effects of Eichhornia Crassipes Biodiesel (ECB) with liquefied petroleum gas (LPG) dual-fuel on diesel engine performance and exhaust emissions characteristics. ...  Read More ...
Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct
Effect of Copper Foam Baffles on Thermal Hydraulic Performance for Staggered Arrangement in a Duct

karrar Gh. Fadhala; Ekhlas M. Fayyadh; Ali F. Mohammed

Volume 41, Issue 1 , January 2023, , Page 243-256

https://doi.org/10.30684/etj.2022.136238.1305

Abstract
  Metal foam is a novel material recently utilized in baffles as an alternative to solid baffles for reducing flow resistance. However, copper foam baffles have been suggested in this ...  Read More ...
Investigation Nano-coating for the Corrosion Protection of Petroleum storage tanks Steel
Investigation Nano-coating for the Corrosion Protection of Petroleum storage tanks Steel

Zainab Z. Ali; Baha S. Mahdi; Ameen D. Thamer

Volume 40, Issue 12 , December 2022, , Page 1615-1623

https://doi.org/10.30684/etj.2022.131942.1074

Abstract
  This work studies the protection from corrosion in the inner surface of petroleum storage tanks by applying nano-coating on the AISI1018 steel type used in these tanks. BNi-2 alloy, ...  Read More ...
Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures
Microstructure and Mechanical Properties of ZK60 Mg Alloy Processed by Cyclic Expansion-Extrusion (CEE) at Different Temperatures

Ahmed M. Marheb; Akeel D. Subhi

Volume 40, Issue 12 , December 2022, , Page 1624-1630

https://doi.org/10.30684/etj.2022.133572.1194

Abstract
  In this work, the cyclic expansion extrusion (CEE) process was applied to ZK60 Mg alloy. The correlation between the evolved microstructure and mechanical properties was investigated. ...  Read More ...
Characterization of the Efficiency of Photo-Catalytic Ultrafiltation PES Membrane Modified with Tungsten Oxide in the Removal of Tinzaparin Sodium
Characterization of the Efficiency of Photo-Catalytic Ultrafiltation PES Membrane Modified with Tungsten Oxide in the Removal of Tinzaparin Sodium

Reham R. Abdullah; Kadhum M. Shabeeb; Aseel B. Alzubaydi; Alberto Figoli; Alessandra Criscuoli; Enrico Drioli; Qusay Alsalhy

Volume 40, Issue 12 , December 2022, , Page 1633-1641

https://doi.org/10.30684/etj.2022.134070.1219

Abstract
  One of the polymeric membranes' main limitations is their susceptibility to fouling, lowering the membrane's performance with time. Therefore, incorporating nanomaterials in polymer ...  Read More ...
The Impacts of Calcium Ions Substitution in Hydroxyapatite with Neodymium and Zinc on Biological Properties and Osteosarcoma Cells
The Impacts of Calcium Ions Substitution in Hydroxyapatite with Neodymium and Zinc on Biological Properties and Osteosarcoma Cells

Suha Q. AL-Shahrabalee; Hussein A. Jaber

Volume 40, Issue 12 , December 2022, , Page 1650-1658

https://doi.org/10.30684/etj.2022.133915.1217

Abstract
  Hydroxyapatite (HA) is one of the important biomaterials in the medical field, especially in bone treatment, because of its biological properties close to human bone. A simple co-precipitation ...  Read More ...
Obstacle Avoidance and Path Planning of a Wheeled Mobile Robot Using Hybrid Algorithm
Obstacle Avoidance and Path Planning of a Wheeled Mobile Robot Using Hybrid Algorithm

Tahseen F. Abaas; Alaa H. Shabeeb

Volume 40, Issue 12 , December 2022, , Page 1659-1670

https://doi.org/10.30684/etj.2022.132929.1154

Abstract
  In the mobile robot workplace, the path planning problem is crucial. Robotic systems employ intelligence algorithms to plan the robot's path from one point to another. This paper proposes ...  Read More ...
Evaluation of PCL Electrospun Scaffolds Concentration on Metformin Hydrochloride Release Ratio
Evaluation of PCL Electrospun Scaffolds Concentration on Metformin Hydrochloride Release Ratio

Saja A. Moosa; Akram R. Jabur; Emad S. Al-Hassani; Ahmed M. Al-Shammari

Volume 40, Issue 12 , December 2022, , Page 1671-1682

https://doi.org/10.30684/etj.2021.131990.1079

Abstract
  The study investigates the effect of polycaprolactone (PCL) concentration on the metformin hydrochloride (MH) release ratio of electrospun nanofiber scaffolds. Blend and emulsion electrospinning ...  Read More ...
A Numerical Study of Friction Stir Welding for AA5754 Sheets to Evaluate Temperature Profile and Plastic Strain
A Numerical Study of Friction Stir Welding for AA5754 Sheets to Evaluate Temperature Profile and Plastic Strain

Mustafa M. Hadi; Mohanned M.H. AL-Khafaji; Akeel D. Subhi

Volume 40, Issue 12 , December 2022, , Page 1683-1694

https://doi.org/10.30684/etj.2022.134304.1237

Abstract
  A full-dimensions 3-D numerical model based on the Lagrangian approach has been employed to predict the peak temperature and the plastic strain distribution in the FSW of (AA5754) joints ...  Read More ...
Investigating the Effect of Different Parameters on Physical Properties of Metakaolin-Based Geopolymers
Investigating the Effect of Different Parameters on Physical Properties of Metakaolin-Based Geopolymers

Ahmed J. Abed AL-Jabar; Hanna A. Al-Kaisy; Sarmad I. Ibrahim

Volume 40, Issue 12 , December 2022, , Page 1702-1711

https://doi.org/10.30684/etj.2022.132691.1138

Abstract
  Recently, geopolymers have received widespread attention due to their ability to completely replace ordinary cement with better efficiency, lower cost, and less damage to the climatic ...  Read More ...
The Effect of Ceo2 Addition on Transformation Temperatures and Wear Resistance of Cu-Al-Ni Shape Memory Alloys
The Effect of Ceo2 Addition on Transformation Temperatures and Wear Resistance of Cu-Al-Ni Shape Memory Alloys

Dina F. Hammadi; Raad S. Ahmed Adnan; Mohammed A. Al-Sarraf

Volume 40, Issue 12 , December 2022, , Page 1712-1722

https://doi.org/10.30684/etj.2022.132840.1144

Abstract
  SMAs can switch from one crystallographic structure to another in response to temperature or stress stimuli. When SMAs are exposed to mechanical cyclic stress, they can absorb and discharge ...  Read More ...
The Effect of Infill Pattern on Tensile Strength of PLA Material in Fused Deposition Modeling (FDM) Process
The Effect of Infill Pattern on Tensile Strength of PLA Material in Fused Deposition Modeling (FDM) Process

Maria F. Jasim; Tahseen F. Abbas; Abdullah F. Huayier

Volume 40, Issue 12 , December 2022, , Page 1723-1730

https://doi.org/10.30684/etj.2021.131733.1054

Abstract
  Fused deposition modeling (FDM) is an additive manufacturing (AM) process often used to build geometrically complex prototypes and parts. It is becoming more popular since it improves ...  Read More ...