A Review on Microbial Fuel Cells
A Review on Microbial Fuel Cells

Baidaa A. Kitafa; Afaf J. Obaid Al-saned

Volume 39, 1A , January 2021, Page 1-8

https://doi.org/10.30684/etj.v39i1A.1518

Abstract
  The Microbial Fuel Cell (MFC) is a bioreactor with which the chemical energy in chemical bonds of organic compounds are converted to electricity under anaerobic conditions through catalytic ...  Read More ...
Performance evaluation of Photovoltaic Panels by a Proposed Automated System Based on Microcontrollers
Performance evaluation of Photovoltaic Panels by a Proposed Automated System Based on Microcontrollers

Mustafa Q. Ali; Monaf S. Tapoub; Hayder A. Dhahadc

Volume 39, 1A , January 2021, Page 9-21

https://doi.org/10.30684/etj.v39i1A.1634

Abstract
  In this paper, an automated test setup for PV panels using LabVIEW and several microcontrollers (μCs) based embedded systems has been designed, tested, and implemented. This PV testing ...  Read More ...
Direct Shear Strength of RPC Member
Direct Shear Strength of RPC Member

Shahad Q. Madhlom; Hussein A. Aziz; Ammar A. Ali

Volume 39, 1A , January 2021, Page 22-33

https://doi.org/10.30684/etj.v39i1A.1638

Abstract
  In this research paper, results are obtained from Reactive Powder Concrete (RPC) push-off specimens - double L shape subjected to direct shear loading. Different parameters considered ...  Read More ...
Experimental Investigation of Thermosyphon Thermal Performance Using Different Filling Ratio
Experimental Investigation of Thermosyphon Thermal Performance Using Different Filling Ratio

Talib Z. Farge; Samar J. Ismael; Rawad M.Thyab

Volume 39, 1A , January 2021, Page 34-44

https://doi.org/10.30684/etj.v39i1A.1639

Abstract
  The present work investigated the thermal performance of thermosyphon by using distilled water as a working fluid at different filling ratios (50%, 60%, and 70 %). The thermosyphon ...  Read More ...
Effects of Evaporator and Condenser Temperatures on the Performance of a Chiller System With a Variable Speed Compressor
Effects of Evaporator and Condenser Temperatures on the Performance of a Chiller System With a Variable Speed Compressor

Ahmed H. Al-Hassani; Alaa R. Al-Badri

Volume 39, 1A , January 2021, Page 45-55

https://doi.org/10.30684/etj.v39i1A.1647

Abstract
  The operation and performance of heat-pump systems are affected by indoor and outdoor operating conditions. Power consumption and system efficiency are related to evaporator and condenser ...  Read More ...
Chemical Extraction Process for Producing High Purity Nanosilica from Iraqi Rice Husk
Chemical Extraction Process for Producing High Purity Nanosilica from Iraqi Rice Husk

Sami A. Ajeel; Khalid A. Sukkar; Naser K. Zedin

Volume 39, 1A , January 2021, Page 56-63

https://doi.org/10.30684/etj.v39i1A.1696

Abstract
  Rice husk is considered a main agricultural waste in Iraq. High purity SiO2 NPs were produced from rice husk by enhanced precipitation and developed leaching processes for the preparation ...  Read More ...
Evaluation of the Hydrodynamic Pressure Effect of Cylindrical Liquid Storage Tank on The Granular Soil Behavior Under Seismic Excitation
Evaluation of the Hydrodynamic Pressure Effect of Cylindrical Liquid Storage Tank on The Granular Soil Behavior Under Seismic Excitation

Ahmed A. Hussein; Mohammed A. Al-Neami; Falah H. Rahil

Volume 39, 1A , January 2021, Page 64-78

https://doi.org/10.30684/etj.v39i1A.1697

Abstract
  Many liquid storage tanks around the world have been affected by earthquakes, and the seismic analysis of such tanks is much more complicated due to the Fluid-Structure Interaction. ...  Read More ...
Thermal Investigations of Double Pass Solar Air Heater with Two Types of Porous Media of Different Thermal Conductivity
Thermal Investigations of Double Pass Solar Air Heater with Two Types of Porous Media of Different Thermal Conductivity

Jalal M. Jalil; Shrooq J. Ali

Volume 39, 1A , January 2021, Page 79-88

https://doi.org/10.30684/etj.v39i1A.1704

Abstract
  This study describes an experimental investigation of the thermal efficiency of stainless steel mesh and steel wool as a porous medium in the lower channel of a double pass solar air ...  Read More ...
Parametric Study on Buckling Behavior of Aluminum Alloy Thin-Walled Lipped Channel Beam with Perforations Subjected to Combined Loading
Parametric Study on Buckling Behavior of Aluminum Alloy Thin-Walled Lipped Channel Beam with Perforations Subjected to Combined Loading

Dalya S. Khazaal; Hussein M. AL-Khafaji; Imad A. Abdulsahib

Volume 39, 1A , January 2021, Page 89-103

https://doi.org/10.30684/etj.v39i1A.1710

Abstract
  The objective of the research presented in this paper is to investigate the buckling behavior of a perforated thin-walled lipped channel beam subjected to combined load. A nonlinear ...  Read More ...
Influence of Microfibers Additive on the Self-healing Performance of Mass Concrete
Influence of Microfibers Additive on the Self-healing Performance of Mass Concrete

Alaa Z. Dahesh; Farhad M. Othman; Alaa A. Abdul-hamead

Volume 39, 1A , January 2021, Page 104-115

https://doi.org/10.30684/etj.v39i1A.1581

Abstract
  Because cracks are the main problem of mass concrete, this paper investigates an experimental study on the effect of polypropylene microfiber (PPMFs) on self -repair behavior of mass ...  Read More ...
Effect of Pulse Electric Field on Water Characteristics as a Disinfection Function in Filtration Unit
Effect of Pulse Electric Field on Water Characteristics as a Disinfection Function in Filtration Unit

Ghassan Abukhanafer; Alaa H. Al-Fatlawi; Hassan H. Joni

Volume 39, 1A , January 2021, Page 116-122

https://doi.org/10.30684/etj.v39i1A.1632

Abstract
  This paper studied the impact of the addition of pulse electric-filed low voltage (PEF-LV) in the filtration process by designing, constructing, and operating a pilot-scale. The Disinfectant ...  Read More ...
A Brief Survey on Modern Iris Feature Extraction Methods
A Brief Survey on Modern Iris Feature Extraction Methods

Hanaa M. Ahmed; Mohammed A. Taha

Volume 39, 1A , January 2021, Page 123-129

https://doi.org/10.30684/etj.v39i1A.1680

Abstract
  This paper presents a survey of some of the most recent research work on the extraction phase of the Iris recognition system. Iris biometric system has been used for person recognition ...  Read More ...
Treatment of Iraqi Municipal Wastewater by up-flow Anaerobic Sludge Blanket Reactor UASB
Treatment of Iraqi Municipal Wastewater by up-flow Anaerobic Sludge Blanket Reactor UASB

Khairi R. Kalash; Majid A. Dixon; Hussein IR. Sultan; Raad A. Ali

Volume 39, 1A , January 2021, Page 130-136

https://doi.org/10.30684/etj.v39i1A.571

Abstract
  In this work, the Upflow Anaerobic Sludge Blanket “UASB” reactor treated effluent wastewater to investigate the process performance on a pilot plant scale. Municipal wastewater ...  Read More ...
Assessing the performance of the evacuated tube solar collector using smart curtain through (PSO based PID) controller and Nano fluids
Assessing the performance of the evacuated tube solar collector using smart curtain through (PSO based PID) controller and Nano fluids

Hosham S.Anead; Khalid F. Sultan; Sura Abdul Jabbar

Volume 39, 1A , January 2021, Page 137-152

https://doi.org/10.30684/etj.v39i1A.1701

Abstract
  This research revealed control on Nano fluid temperature in the evacuated tube solar collector system, where Nano fluids used in ETSC as working fluid to increase heating system thermal ...  Read More ...
Strength Analysis of an Aircraft Sandwich Structure with a Honeycomb Core: Theoretical and Experimental Approaches
Strength Analysis of an Aircraft Sandwich Structure with a Honeycomb Core: Theoretical and Experimental Approaches

Sadiq E. Sadiq; Muhsin J. Jweeg; Sadeq H. Bakhy

Volume 39, 1A , January 2021, Page 153-166

https://doi.org/10.30684/etj.v39i1A.1722

Abstract
  In this paper, the strength of aircraft sandwich structure with honeycombcore under bending load was evaluated theoretically and experimentallybased on failure mode maps. A failure ...  Read More ...