Engineering and Technology Journal

Research Paper

Assessment of Properties of Composite Boards from Groundnut Shells and Sawdust for their suitability for Structural Applications

Ekong U. Nathaniel; Nsikak E. Ekpenyong; Casmir C. Zanders Akaolisa; Okwet J. Yawo; Grace P. Umoren; Samuel S. Akpan

Volume 42, Issue 4 , April 2024, Page 388-397

https://doi.org/10.30684/etj.2023.144328.1628

Abstract

Groundnut shells and sawdust are generated in vast quantities yearly but under-utilized. In developing countries, this situation leads to their disposal by unplanned landfilling, indiscriminate ... Read More ...

Research Paper

Influence of oil palm mesocarp fiber on physical properties of fabricated plaster of paris ceilings

Armstrong U. Anonaba; Francis C. Eze; Israel C. Ndukwe

Volume 42, Issue 4 , April 2024, Page 398-406

https://doi.org/10.30684/etj.2024.145008.1651

Abstract

This study was designed to investigate how some important physical properties of Plaster of Paris (POP) ceilings are affected by the utilization of untreated oil palm mesocarp fiber ... Read More ...

Research Paper

Effect of the stochastic weibull parameters on the reliability of the dialysis machine

Sofiene Fenina; Souheyl Jendoubi; Faker Bouchoucha

Volume 42, Issue 4 , April 2024, Page 407-420

https://doi.org/10.30684/etj.2024.145834.1665

Abstract

Dialysis machines operate in an uncertain environment with several sources of disturbances; therefore, it is necessary to take account of the uncertainties during all their life phases. ... Read More ...

Research Paper

Blockchain-based E-Government system using WebSocket protocol

Zainab A. Kamal; Rana F. Ghani; Alaa K. Farhan

Volume 42, Issue 4 , April 2024, Page 421-429

https://doi.org/10.30684/etj.2024.146559.1689

Abstract

This paper explores the Integration of Blockchain technology and WebSocket protocol to implement E-government system. Blockchain is used to record the correspondence between users and ... Read More ...

Research Paper

Recycling of waste papers: yield and quality of the ash-derived materials

Ubong W. Robert; Sunday E. Etuk; Okechukwu E. Agbasi; Prosperity D. Ambrose; Rowland Adewumi

Volume 42, Issue 4 , April 2024, Page 430-436

https://doi.org/10.30684/etj.2024.146884.1695

Abstract

This research was designed to assess the yield and quality of ash prepared from different types of waste papers. Waste newspapers, writing papers, and cartons were selected for combustion ... Read More ...

Data Transfer of Total Station Traverses

Ruba Yousif Hussain

Volume 32, Issue 8 , August 2014, , Page 1903-1915

https://doi.org/10.30684/etj.32.8A2

Abstract

The major objective of this paper is to transfer field data stored in the total station memory to a computer . Number of stations is established in the study area . The positions of ... Read More ...

The Use of Inexpensive Sorbents to Remove Dyes from Wastewater - A Review

Firas Sh. Ahmed; Adnan A. Abdul Razak; May A. Muslim

Volume 40, Issue 3 , March 2022, , Page 498-515

https://doi.org/10.30684/etj.v40i3.2281

Abstract

Dyes are utilized in various industrial applications, and some businesses' effluents include hazardous dyes. Humans, aquatic creatures, and the environment are all harmed by dyes. As ... Read More ...

A Review of the Natural Gas Purification from Acid Gases by Membrane

Dheyaa Jasim; Thamer J. Mohammed; Mohammad F. Abid

Volume 40, Issue 3 , March 2022, , Page 441-450

https://doi.org/10.30684/etj.v40i3.1983

Abstract

This study aims to shed light on natural gas as an important and promising energy source. This energy source is the fastest-growing source in the world due to the increasing global ... Read More ...

Hand Gesture Recognition of Static Letters American Sign Language (ASL) Using Deep Learning

Abdulwahab A. Abdulhussein; Firas A. Raheem

Volume 38, 6A , June 2020, , Page 926-937

https://doi.org/10.30684/etj.v38i6A.533

Abstract

An American Sign Language (ASL) is a complex language. It is depending on the special gesture stander of marks. These marks are represented by hands with assistance by facial expression ... Read More ...

The Energy-Efficient Control Solutions of Smart Street Lighting Systems: A Review, Issues, and Recommendations

Tarek Abedin; Chong Tak Yaw; Siaw Paw Koh; M.A. Hannan; Sieh Kiong Tiong; Kok Hen Chong; Ahmed N Abdalla; Kharudin Ali

Volume 41, Issue 8 , August 2023, , Page 1034-1057

https://doi.org/10.30684/etj.2023.137195.1338

Abstract

The smart street-lighting system (SSLS) is a leading candidate in the smart city. By the time of the last 15 cycles, many meaningful improvements have been executed in the SSLS with ... Read More ...

Research Paper

Solving Westergaard Half-Space Problems Using Potential Theory

Charles Chinwuba Ike

Articles in Press, Corrected Proof, Available Online from 03 December 2023

https://doi.org/10.30684/etj.2023.141182.1486

Abstract

The Westergaard half-space problem has been solved using the potential theory in this work. It is a classical theme in elasticity theory that seeks to find the displacements and stresses ... Read More ...

Research Paper

Torsional Strength of Horizontally Curved Continuous Reinforced Concrete Box Girder Bridges

Asala A. Dawood; Khattab S. Abdul-Razzaq; Wael S. Abdulsahib

Articles in Press, Corrected Proof, Available Online from 03 December 2023

https://doi.org/10.30684/etj.2023.142438.1533

Abstract

The horizontally curved box girder bridges are considered important nowadays because of their low cost compared to the load capacity and torsion moments that they can carry. This study ... Read More ...

Research Paper

Modifying the Strength of Soft Soils via Heating and Cement Grouting Method

Ali H. Shareef; Mohammed A. Al- Neami; Falah H. Rahil

Articles in Press, Corrected Proof, Available Online from 10 December 2023

https://doi.org/10.30684/etj.2023.143018.1556

Abstract

Soft clayey soils present geotechnical engineering challenges with significant stability and settlement. Various methods are employed to enhance the geotechnical properties of these ... Read More ...

Research Paper

Effect of Structure Height on Seismic Response of Adjacent Structures Considering Soil-Structure Interaction

Mohammed A. Abdulaziz; Mohammed J. Hamood; Mohammed Y. Fattah

Articles in Press, Corrected Proof, Available Online from 29 December 2023

https://doi.org/10.30684/etj.2023.143892.1614

Abstract

Seismic activity has emerged as a mostly attractive issue for researchers and engineers, particularly in light of the recent occurrence of severe earthquakes worldwide, such as those ... Read More ...

Research Paper

Manufacturing of Sustainable Ultra-High-Performance Concrete Using Response Surface Methods

Abbas J. Mohammed; Maan S. Hassan; Hussein Al-Quraishi

Articles in Press, Corrected Proof, Available Online from 30 December 2023

https://doi.org/10.30684/etj.2023.143595.1598

Abstract

Quartz powder is used in ultra-high-performance concrete to improve granular packing, but repeated inhalation during manufacture can cause health issues. The mechanical properties of ... Read More ...

Research Paper

The Impact of Magnetic Abrasive Finishing (MAF) Process Parameters on the Microhardness of Stainless Steel SUS420 Bubble Cups

Athraa M. Salih Ahmed; Saad K. Shather

Articles in Press, Corrected Proof, Available Online from 03 January 2024

https://doi.org/10.30684/etj.2023.142890.1563

Abstract

The optimal performance of bubble cups relies on achieving the appropriate surface quality, a common requirement in various industrial applications. The effectiveness of the Magnetic ... Read More ...

Research Paper

Experimental and Multi-Optimization Investigation of Machining (X210) Alloy Steel Using Angled EDM Electrodes

Ahmed M. Abbas; Ali Abbar Khleif

Articles in Press, Corrected Proof, Available Online from 03 January 2024

https://doi.org/10.30684/etj.2023.143826.1612

Abstract

Electrical Discharging Machining (EDM) offers broad capabilities that allow it to be used in the manufacturing, automotive, and aviation industries, as well as practically all disciplines ... Read More ...

Research Paper

Cold sintering process of hydroxyapatite derived from natural bone and co-precipitation method: a comparative study

Hawraa O. Abbas; Hanaa A. Smeig; Zuhair J. Abdul Ameer

Articles in Press, Corrected Proof, Available Online from 07 January 2024

https://doi.org/10.30684/etj.2023.143947.1617

Abstract

This study uses a novel sintering technique at very low temperatures (below 300°C) named the Cold Sintering Process to produce highly dense Hydroxyapatite (HA) samples. Nano hydroxyapatite ... Read More ...

Research Paper

Life cycle economic comparison between rigid and flexible pavement: a case study for the construction of wajen- garin barkamawa-dugurawa road in kano state nigeria

Rowland Adewumi; Wasiu Kayode Sulaiman; Adeniyi Shola

Articles in Press, Corrected Proof, Available Online from 07 January 2024

https://doi.org/10.30684/etj.2023.144541.1637

Abstract

Flexible pavements may be strengthened and enhanced incrementally to meet traffic needs, making them preferable to cement concrete roadways. Due to the rise of poor-quality bituminous ... Read More ...

Research Paper

Antibacterial improvement with multilayer of bio-composite coatings produced by electrophoretic deposition

Noor A AL-Ali; Makarim H. Abdulkareem; Iman A. Anoon

Articles in Press, Corrected Proof, Available Online from 08 January 2024

https://doi.org/10.30684/etj.2023.143475.1588

Abstract

In this study, multi-structured coatings of biocompatible and antibacterial materials on a 316L stainless steel (SS) implant have been electrophoretically deposited for orthopedic applications. ... Read More ...

Research Paper

Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers

Ikram F. Ahmed Al-Mulla; Tareq al-Attar; Abbas Al-Ameeri; Ammar Al-Rihimy

Articles in Press, Corrected Proof, Available Online from 09 January 2024

https://doi.org/10.30684/etj.2023.142430.1531

Abstract

The incorporation of fibers into engineered cementitious composite concrete imparts flexibility to the material. Therefore, using different types and contents of polymeric fibers would ... Read More ...

Research Paper

Design and manufacturing of custom 3D printed bone implants

Zaineb H. Neamah; Luma A. Al-Kindi; Ghassan Al-Kindi

Articles in Press, Corrected Proof, Available Online from 09 January 2024

https://doi.org/10.30684/etj.2023.143788.1609

Abstract

In medical surgery, a customized implant is often required to meet surgical requirements, especially in cases with complicated or traumatic deformities. The emerging techniques of additive ... Read More ... In medical surgery, a customized implant is often required to meet surgical requirements, especially in cases with complicated or traumatic deformities. The emerging techniques of additive manufacturing, e.g., 3D printing, may help provide a quick response to such needs, provided that a valid approach capturing required implant shape data is generated and processed to better suit 3D printing. Different materials, including biocompatible polymer and metal, may suit medical-surgical applications. In this paper, an investigation is conducted to assess 3D printing technology use as part of a full system, from capturing implant shape data to producing the customized implant. The investigation is supported by experimental studies of medical cases. The first case aimed to produce shatter-related finger distal phalanx implants, whereas the second aimed to design and reconstruct a suitable cranial implant for a patient with a left frontoparietal skull lesion. For these cases, the study has adopted a scenario based on CT scans to generate the required implant shape data; hence using DICOM format. The captured data from the two cases are processed using a developed systematic processing approach to generate the final design of the required customized implants. The designs are then converted into suitable manufacturing codes for 3D printed plastic and metal prototypes enabling the assessment of the technique utilizing the facilities of UrukTech Company in Baghdad, Iraq, and Sohar University in Oman. Results show that the developed approach, from data capture to 3D printed implants, has succeeded in addressing the need for customized implants. For instance, the accuracy of the cranial implant was confirmed dimensionally, aiding in restoring structures, appearance, and psychological stability. The design and manufacturing of custom 3D-printed bone implants represent a significant advancement in medical technology and orthopedics, provided that biocompatible materials are used. Therefore, the technique may be adopted in the near future to serve the medical surgery field. The developed approach in this study encompasses several key ideas, contributions, and significant results, including creating patient-specific bone implants by utilizing medical imaging and 3D printing. Hence, the developed approach enables the creation of complex implant geometries that otherwise would be challenging to manufacture.

Research Paper

Microwave dielectric properties of Zn1-xCuxWO4 (x= 0, 0.03)/Polymer Composites

Lamees S. Faeq; saad B. Farid; Fadhel A. Hashim

Articles in Press, Corrected Proof, Available Online from 10 January 2024

https://doi.org/10.30684/etj.2023.143514.1590

Abstract

The rapid growth in wireless telecommunication systems has spurred a strong interest in lightweight, compact, and cost-effective materials. One promising solution for achieving these ... Read More ...

Research Paper

Effects of Dy2O3 doping on physical and mechanical characteristics of B2O3-TeO2-BaO glass

Saba F. Hathot; Balqees M. Al dabbagh; Haydar Aboud

Articles in Press, Corrected Proof, Available Online from 12 January 2024

https://doi.org/10.30684/etj.2024.145037.1649

Abstract

A new oxide glass host of the form (50-x) B2O3-25TeO2-25BaO-xDy2O3 (where x was varied from 0 to 1.25 mol%) was prepared using the conventional melt-cast quenching method. The study ... Read More ...

Research Paper

Comparison of locally manufactured composite tile adhesive using waste material with imported tile adhesive

Samer K. turki; Sarmad I. Ibrahim; Mohammed H.D. Al Maamorib

Articles in Press, Corrected Proof, Available Online from 17 January 2024

https://doi.org/10.30684/etj.2023.141789.1593

Abstract

One of the most important construction activities worldwide is the construction using autoclaved aerated concrete units at the global level is increasing significantly and the use of ... Read More ...

Research Paper

Drought forecasting model for future climate change effects in a regional catchment area in northern iraq

Nasser Kh. Muhaisen; Thair S. Khayyun; Mustafa M. Al-Mukhtar

Articles in Press, Corrected Proof, Available Online from 20 January 2024

https://doi.org/10.30684/etj.2024.144458.1634

Abstract

Climate change plays a crucial role in shaping the hydrological dynamics of rivers owing to its immediate implications on the driving meteorological parameters. Therefore, Understanding ... Read More ... Climate change plays a crucial role in shaping the hydrological dynamics of rivers owing to its immediate implications on the driving meteorological parameters. Therefore, Understanding climate change and its implications is essential for sustainable water resource management. This study aims to assess the extent of climate change and its effects on streamflow in the Mosul Dam watershed Under three global warming Representative Concentration Pathways scenarios (i.e., 2.6, 4.5, and 8.5) based on mean climate data extracted from four Global Circulation Models (i.e., Beijing Climate Center, China, Commonwealth Scientific and Industrial Research Organization, Australia, Met Office Hadley Center, United Kingdom, and Norwegian Climate Center, Norway). For this purpose, the stochastic weather generator model (LARS – WG) and soil and water assessment tool (SWAT) were used. The hydrological model (SWAT) was calibrated and validated for 2001-2013 and 2014-2020, respectively. The performance of the swat model according to the four statistical parameters (i.e., coefficient of determination, Nash-Sutclife, Root mean square error to the standard deviation, and percent bias test) was classified as very good for two calibration and validation processes. Additionally, results showed that the mean temperature would probably rise by 1.3, 2.4, and 4.5°C under RCP 2.6, RCP 4.5, and RCP 8.5 at the end of this century, respectively. At the end of the century, the simulated average annual precipitation decreased from 772 mm/y to 756.7 and 741.6 mm/y under RCP4.5 and RCP8.5, respectively. In contrast, under the RCP2.6 scenario, the mean annual precipitation increased to 803 mm/year. As a result, the projected mean annual streamflow decreased from 501.52 m3/s to 429.7, 391.9, and 376.6 m3/s at the end of the century under RCP2.6, RCP4.5, and RCP8.5, respectively. Finally, the study region will potentially face water shortage due to climate change, exacerbated by population growth and increased water demands from agriculture and municipalities. Therefore, this paper emphasizes the need for reevaluating and adapting to accommodate changing streamflow patterns, ensuring a sustainable water supply for human needs while protecting the environment.

Research Paper

Experimental and optimization study of powder metallurgy process parameters of magnesium base AZ31 alloy using taguchi method

Basma F. Sultan; Muna K. Abbass; Jawdat A. Yagoob; Yang Y. Guo

Articles in Press, Corrected Proof, Available Online from 28 January 2024

https://doi.org/10.30684/etj.2023.142510.1539

Abstract

Powder metallurgy (PM) is a highly effective re-processing method mostly used for magnesium-base alloys, especially in high-performance Mg alloys. In the present work, the experimental ... Read More ...

Research Paper

The influence of micro channel on the performance of low concentrator parabolic collector systems with phase change material

Jenan D. Hamdi; Jalal M. Jalil; Ahmed H. Reja

Articles in Press, Corrected Proof, Available Online from 05 February 2024

https://doi.org/10.30684/etj.2024.144040.1619

Abstract

Increasing global economic development leads to a continuous increase in energy demand, considering the limited conventional resources of energy as well as the impact on the environment ... Read More ...

Research Paper

Performance of potato starch admixture on fresh and hardened behaviours of concrete at varied mix design ratios

Chidobere David Nwa-David

Articles in Press, Corrected Proof, Available Online from 12 February 2024

https://doi.org/10.30684/etj.2024.145272.1654

Abstract

The urgency to attenuate techno-economic and ecological threats constituted by chemical admixtures has necessitated the adoption of feasible natural admixtures. The chemical interaction ... Read More ...

Research Paper

Evaluating the structural performance of waste PET-infused interlocking units versus traditional stone masonry

Omogbolade L. Adepitan; Ayotunde O. Fasina

Articles in Press, Corrected Proof, Available Online from 14 February 2024

https://doi.org/10.30684/etj.2024.145504.1656

Abstract

This study focuses on PET waste reduction worldwide by looking at the application of these polymeric materials in the construction and building industries. An effective application ... Read More ...

Research Paper

Effect of the material properties of the rotor-disc on the performance of eddy current braking systems

Ahmed M. Salman; Jamal A.-K. Mohammed; Farag M. Mohammed

Articles in Press, Corrected Proof, Available Online from 16 February 2024

https://doi.org/10.30684/etj.2024.144221.1625

Abstract

Failure of traditional brakes occurs due to raised temperatures and the formation of structural fractures caused by wear and strain. For resolving mechanical brake problems, consider ... Read More ...

Research Paper

Evaluating Land Use Land Cover Classification Based on Machine Learning Algorithms

Basheer S. Jasim; Oday Z. Jasim; Amjed N. AL-Hameedawi

Articles in Press, Corrected Proof, Available Online from 18 February 2024

https://doi.org/10.30684/etj.2024.144585.1638

Abstract

Image classification depends substantially on the remote sensing method to generate maps of land use and land cover. This study used machine learning algorithms for classifying land ... Read More ...

Research Paper

Performance enhancement of PV panels by a channel shaped heat exchanger with an electromechanical control

Hussein A. Idan; Hatam K. Kadhom; Sahar R. Faraj

Articles in Press, Corrected Proof, Available Online from 18 February 2024

https://doi.org/10.30684/etj.2024.143283.1575

Abstract

Photovoltaic panels are considered one of the important practical applications in converting solar energy into electrical energy, but they suffer from the effect of heat associated ... Read More ...

Research Paper

Effect of carbonization on the mechanical properties of mild steel utilizing oak charcoal as a carbon source

Omer S. Mahmood

Articles in Press, Corrected Proof, Available Online from 29 February 2024

https://doi.org/10.30684/etj.2024.144383.1630

Abstract

Carburizing is a process that improves the mechanical properties of low-carbon steel, particularly its surface hardness. Introducing carbon into the steel's surface enhances the creation ... Read More ...

Research Paper

Realization of an all-optical d and t flip flops with nano-structure using hybrid plasmonic waveguides

Saif H. Abdulwahid; Ahmed G. Wadday; Sinan M. Abdul Sattar

Articles in Press, Corrected Proof, Available Online from 16 March 2024

https://doi.org/10.30684/etj.2023.142434.1532

Abstract

Surface waves are electromagnetic waves propagating along the interface between a metal and an insulator. Surface waves break the diffraction limits and enable light to propagate in ... Read More ...

Research Paper

Survey of near-field wireless communication and power transfer for biomedical implants

Hala K. Abduljaleel; Saad Mutashar; Sadik Kamel Gharghan

Articles in Press, Corrected Proof, Available Online from 18 March 2024

https://doi.org/10.30684/etj.2024.144480.1636

Abstract

Bio-implanted medical devices with electronic components play a crucial role due to their effectiveness in monitoring and diagnosing diseases, enhancing patient comfort, and ensuring ... Read More ...

Research Paper

Modeling and control of a high-quality electro-hydraulic actuator driven via an induction motor under intelligent indirect vector control

Aws F. Hassan; Jamal A.-K. Mohammed; Walaa M. Hashim

Articles in Press, Corrected Proof, Available Online from 21 March 2024

https://doi.org/10.30684/etj.2024.144140.1622

Abstract

Due to its excellent energy efficiency and broad speed range, the variable-speed electro-hydraulic drive is an appealing driving principle in many contemporary industrial applications. ... Read More ...

Research Paper

Innovative self-healing concrete using polycarboxylate ether: a fused deposition modeling approach with 3D-printed polylactic acid vascular networks

Noor A. Hameed; Alaa A. Abdul-Hamead; Farhad M. Othman

Articles in Press, Corrected Proof, Available Online from 26 March 2024

https://doi.org/10.30684/etj.2024.145499.1655

Abstract

Concrete's fracture susceptibility is due to its limited tensile strength, which can lead to cracks. Steel reinforcement is added to designated areas to address this issue, but minuscule ... Read More ... Concrete's fracture susceptibility is due to its limited tensile strength, which can lead to cracks. Steel reinforcement is added to designated areas to address this issue, but minuscule cracks can allow liquids and vapors to infiltrate the reinforcing material, causing corrosion. Self-healing concrete can resist corrosion by mending and sealing minor cracks. This study aims to determine if fused deposition modeling (FDM) can fabricate innovative vascular networks and tubes from polylactic acid (PLA) created by using three-dimensional (3D) printing methods, and its characteristics were contrasted with those of two- and one-dimensional (2D) networks.The dimensions of the internal and exterior diameters were 4 and 5.6 mm, respectively. The researchers used a planetary ball mill to apply an organic polycarboxylate ether liquid and fly ash nanopowder to all vascular architectures. The prefabricated tubes were then incorporated into a concrete beam to enable self-repairing capabilities. The water-to-cement ratio was 0.6%; the mixture was 1 part cement, 2.16 parts water, and 2.98 other ingredients. The self-healing properties were assessed using a four-point bending test. The developed pipes can produce self-healing concrete by introducing nano fly ash particles and low-viscosity healing solutions into the blood vessel network, enabling the concrete to undergo self-repair mechanisms. The specimen that had 3D treatment restored its strength to 95% at flexural recovery.The dimensions of the internal and exterior diameters were 4 and 5.6 mm, respectively. The researchers used a planetary ball mill to apply an organic polycarboxylate ether liquid and fly ash nanopowder to all types of vascular architectures. The prefabricated tubes were then incorporated into a concrete beam to enable self-repairing capabilities. The water-to-cement ratio was 0.6%, and the mixture was 1-part cement, 2.16 parts water, and 2.98 parts other ingredients. The self-healing properties were assessed using a four-point bending test. The developed pipes can be used in the production of self-healing concrete by introducing nano fly ash particles into the blood vessel network and low-viscosity healing solutions, enabling the concrete to undergo self-repair mechanisms. the specimen that had 3D treatment restored its strength to a level of 95% at flexural recovery.

Research Paper

ANFIS control of four-quadrant DC/DC chopper for wireless EV charging

Hawraa Q. Hameed; Hosham S. Anead; Khalid F. Sultan

Articles in Press, Corrected Proof, Available Online from 27 March 2024

https://doi.org/10.30684/etj.2024.146136.1673

Abstract

Wireless charging of electric vehicles (EVs) poses issues like power ripples that reduce battery lifetime. This study proposes a four-quadrant DC/DC chopper controlled by an adaptive ... Read More ...

Research Paper

Experimental analysis and combustion characteristics of briquettes from different wood in nigeria

Oluwaseyi O. Alabi; Timothy A. Adeyi; Sakiru K. Ekun

Articles in Press, Corrected Proof, Available Online from 28 March 2024

https://doi.org/10.30684/etj.2024.144659.1640

Abstract

The increasing demand for sustainable and renewable energy sources has prompted extensive research into alternative biomass fuels, particularly in regions like Nigeria, where traditional ... Read More ...

Research Paper

Computational insights into the thermal performance enhancement of solar air heater channel through metal foam integration

Kadhim Al-Chlaihawi; Moayed R. Hasan; Ali L. Kaied

Articles in Press, Corrected Proof, Available Online from 31 March 2024

https://doi.org/10.30684/etj.2024.145706.1660

Abstract

The two-dimensional numerical simulations focused on fluid flow and heat transfer within a solar air heater (SAH) channel incorporating copper metal foam with a porosity of 90% were ... Read More ...

Research Paper

The impact of electronic control systems on improving the performance of the solar heater

Ekram H. Alaskaree; Younus F. Breesam

Articles in Press, Corrected Proof, Available Online from 03 April 2024

https://doi.org/10.30684/etj.2024.145174.1652

Abstract

In this study, the effect of an electronic control system (ECS) on the performance of a solar heater fabricated from recycled materials was investigated . The study found that the maximum ... Read More ...

Research Paper

Theoretical and experimental investigation of the effect of heat flux to lift water in a solar bubble pump

Ihab Omar; Ahmed A. M. Saleh; Ahmed N. Alhusseny

Articles in Press, Corrected Proof, Available Online from 04 April 2024

https://doi.org/10.30684/etj.2024.145911.1669

Abstract

In remote areas, a scarcity of accessible water poses a significant predicament, and sun-powered propelling contraptions offer promising solutions. It is possible to collect solar energy ... Read More ...

Research Paper

Design of waste stabilisation ponds for municipal effluent treatment in Sobi cantonment, Ilorin, Nigeria

Francis James Ogbozige

Articles in Press, Corrected Proof, Available Online from 05 April 2024

https://doi.org/10.30684/etj.2024.146992.1698

Abstract

The generation of wastewater or effluent is unavoidable as long as humans exist, and it could cause potential danger if not properly managed. One way to manage it is by ensuring proper ... Read More ...

Research Paper

Optimization of mechanical and biocompatible properties of ZnOs-fiber membranes

Dalia M. Jomaa; Abbas Kh. Hussein; Jamal J. Dawood

Articles in Press, Corrected Proof, Available Online from 07 April 2024

https://doi.org/10.30684/etj.2024.145042.1650

Abstract

This study uses electro-spinning techniques to create a poly(vinyl alcohol)-chitosan-zinc oxide nanoparticles (PVA+CS)+ZnO NPs system in three concentrations of ZnO for application ... Read More ... This study uses electro-spinning techniques to create a poly(vinyl alcohol)-chitosan-zinc oxide nanoparticles (PVA+CS)+ZnO NPs system in three concentrations of ZnO for application as composite nanofibers for wound treatment applications and Employing the Taguchi technique to optimize the mechanical characteristics via a four-level experimental design process (L16). Numerous techniques have been utilized to characterize the nanofibrous scaffolds: contact angle measurement, cytotoxicity testing, proliferation testing, evaluation of antimicrobial activity, Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersion X-ray Spectroscopy (EDX), and a comparative experimental study involving the determination of hardness using the Nanoindentation method for (PVA+CS)+ZnO. The ideal combination for adding ZnO as nanoparticles was found to be (PVA+CS)+0.6 ZnO, with a flow rate of 0.5 mL/hr, an applied voltage of 18 kV, and a needle tip-to-collector distance of 15 cm (position). This resulted in the smallest fiber diameter (48 nm) with a smooth and uniform distribution. As a consequence, (PVA+CS)+ZnO can be regarded as non-toxic in accordance with the criteria. The methyl thiazole tetrazolium (MTT) assay was used to evaluate the cell viability of L929 (cell cultures for skin). It significantly affects cell viability, achieving 50% in less than 24 hours, which means cell growth through 24 hours is necessary for embryonic development, tissue repair, and regulation of cell division in case of wound healing. Exhibiting findings of inhibition zone diameter in antibacterial activity test exceeding 20 mm. According to the results, (PVA+CS)+0.6 ZnO's hydrophilic properties showed a well-connected porous structure and made it easier for nutrients and oxygen to be exchanged, encouraging cellular activity. After evaluating the mechanical characteristics of each specimen, the main determinants of these characteristics are determined using a Taguchi orthogonal array L16 design. The results of this study suggest that (PVA+CS)+0.6 ZnO could be a good biomedical material for skin tissue engineering applications.

Review Paper

3D Printing for wind turbine blade manufacturing: a review of materials, design optimization, and challenges

Ahmed k. Zarzoor; Alaa A. Jaber; Ahmed A. Shandookh

Articles in Press, Corrected Proof, Available Online from 12 April 2024

https://doi.org/10.30684/etj.2024.144841.1646

Abstract

Wind energy has become an easy-to-harness source by converting captured wind currents into electrical energy. Powerful and customizable wind turbines are used to convert wind energy ... Read More ...

Research Paper

Effect of tool profile on micro hardness, forming limit, and final thickness in incremental hole flanging process of DC01 steel and AA1050 sheet metals

Hunar M. Tahir M. Ali; Hameed D. Lafta; Ayad F. Shahab

Articles in Press, Corrected Proof, Available Online from 14 April 2024

https://doi.org/10.30684/etj.2024.146281.1677

Abstract

The present study delves into the incremental hole flanging process applied to AA1050 and DC01 sheet metals with 0.7 and 1 mm thicknesses. Employing a distinctive lathe-based fixture, ... Read More ...

Review Paper

Enhancing performance of Double-Slope solar stills through optimization of heat addition methods: a comprehensive analysis

Mariam E. Murad; Wissam H. Alawee; Hayder A. Dhahad; Z.M. Omara

Articles in Press, Corrected Proof, Available Online from 15 April 2024

https://doi.org/10.30684/etj.2024.145648.1657

Abstract

This comprehensive research paper reviews the latest techniques to enhance the productivity of double-slope solar stills by providing quantitative data on key research outcomes. With ... Read More ... This comprehensive research paper reviews the latest techniques to enhance the productivity of double-slope solar stills by providing quantitative data on key research outcomes. With the global water scarcity crisis and the need for effective desalination technology, this study focuses on solar-based desalination techniques and their specific application in double-slope solar stills. This paper offers a comprehensive and quantitative analysis of heat addition methods in double-slope solar stills by examining published research findings, providing valuable insights for researchers and practitioners. The study reveals significant improvements in productivity through various modifications. Evaporation enhancement, heat transfer enhancement, and condensation enhancement have proven to be highly effective, resulting in substantial increases in water production. The use of thermoelectric modules in double-slope solar stills has shown a remarkable 250% increase in water production by heating the water in the basin, which enhances evaporation rates and condensation on the glass cover. Moreover, the integration of Evacuated Tube Collectors (ETCs) has demonstrated a notable improvement in double-slope solar stills' life cycle conversion efficiency. The system incorporating ETCs achieved an impressive 59.42% higher efficiency than a system without ETCs, primarily due to the enhanced thermal input provided by ETCs to the solar still's basin. Another significant finding is the six-fold increase in water production achieved by implementing the double-slope solar still with a PV heater (CSSPVH) compared to conventional solar stills (CSS). This substantial improvement positions the CSSPVH design as a highly efficient solution for long-term potable water generation. Furthermore, adding a water heater to the base tank of a solar still has been found to raise water temperature quickly, resulting in a significant boost in production by approximately 370%. However, it is important to note that productivity decreases with increasing wind speed. Even with an outer cooling fan to cool the solar still's glass surface, productivity is reduced by 4% and 8% for wind speeds of 7 m/s and 9 m/s, respectively.

Research Paper

Effect of MXene Ti3C2 on the PVDF ultrafiltration membrane properties and performance

Tamara W. Abood; Kadium M. Shabeeb; Aseel B. Alzubaydi; Qusay F Alsalhy; Pei S. Goh; Ahmad F. Ismail; Adel Zrelli

Articles in Press, Corrected Proof, Available Online from 16 April 2024

https://doi.org/10.30684/etj.2024.145778.1663

Abstract

The problem of membrane fouling remains a significant concern in ultrafiltration, a commonly employed method in water treatment due to its high efficacy and minimal energy consumption. ... Read More ...

Review Paper

MXene (Ti C Tx) based nanosheet photocatalysts for water remediation: challenges and recent developments

Hadeel A. Abbas; Khalid K. Abbas; Ahmed M. Al-Ghaban

Articles in Press, Corrected Proof, Available Online from 18 March 2024

https://doi.org/10.30684/etj.2024.146505.1683

Abstract

Two-dimensional nano structural compounds are attracting the focus of researchers worldwide. The need to treat wastewater and prevent the release of hazardous substances into the environment ... Read More ... Two-dimensional nano structural compounds are attracting the focus of researchers worldwide. The need to treat wastewater and prevent the release of hazardous substances into the environment has increased because of growing environmental awareness. New compounds, most of which are not biodegradable, have emerged due to rising consumer expectations. Due to their distinctive chemical and physical characteristics, MXene has lately been recognized as an exciting option. The strong hydrophilicity of MXene makes them a promising candidate for environmental remediation methods like photocatalysis, natural chemical nature, and powerful electrochemistry—adsorption, membrane separation, and electrocatalytic sensors for identifying pollution. MXene has strong surface functional groups, an ion exchange property, and an extremely hydrophilic surface. The most recent developments in MXene preparation and characterization for (Ti C Tx) based nano photocatalysts for water remediation and applications are summarized in this review. Additionally, there are difficulties associated with the synthesis and application of MXene for examining and discussing pollution decontamination. This emerging field focuses on utilizing MXene materials to address water pollution issues through photocatalytic processes. Challenges in designing effective MXene-based photocatalysts are explored, including issues related to charge carrier separation, electron transfer dynamics, and optimizing catalytic efficiency. Recent developments and innovative strategies for overcoming these challenges are discussed, highlighting advancements in enhancing photocatalytic performance and improving water remediation capabilities. The synopsis aims to provide a concise overview of the current state of MXene-based nano photocatalysts for water treatment, offering insights into both hurdles and promising breakthroughs in this critical area of environmental research.

Publication Information

Volume 42 (2024)

Volume 41 (2023)

Volume 40 (2022)

Volume 39 (2021)

Volume 38 (2020)

Volume 37 (2019)

Volume 36 (2018)

Volume 35 (2017)

Volume 34 (2016)

Volume 33 (2015)

Volume 32 (2014)

Volume 31 (2013)

Volume 30 (2012)

Volume 29 (2011)

Volume 28 (2010)

Volume 27 (2009)

Volume 26 (2008)

Volume 25 (2007)

Volume 24 (2005)

Volume 1 (1983)

Volume 02 (1978)

Volume 01 (1977)

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Keywords Cloud