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Influence Of Recycled Fine Aggregates On Strength Properties Of Reactive Powder Mortar, Doaa H. Nayyef, Shatha S. Hasan Aug 2026

Influence Of Recycled Fine Aggregates On Strength Properties Of Reactive Powder Mortar, Doaa H. Nayyef, Shatha S. Hasan

Engineering and Technology Journal

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 reactive powder concrete. Experimental work was executed to investigate the influence of utilizing recycled concrete as fine aggregate in reactive powder concrete. Five different mixes were prepared, the first mix, or control mix, was prepared with natural sand, four additional mixes were prepared with different percentage of substitution of fine aggregates(20%,40%,60%, and 80%). The investigation was carried out using compressive strength test, direct tensile strength test and flexural strength test, and two methods of …

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The Study Air Temperature Annual Rates Effect For Urban Of Baghdad City By Using Remote Sensing Data Techniques, Ali Mohammed Ali, Fouad Mashee Al Ramahi Aug 2026

The Study Air Temperature Annual Rates Effect For Urban Of Baghdad City By Using Remote Sensing Data Techniques, Ali Mohammed Ali, Fouad Mashee Al Ramahi

Engineering and Technology Journal

Within a short amount of years, urban land in Baghdad governorate increased as a result of the improvement of the economic factor of human beings, the speedy enlargement Buildings method brought many negative climate issues, for instance, the violent modification of land use and the growth UHI, which led to a decrease in vegetation cover, where influenced the temperature averages, Accordingly, we conducted the following study to find solutions, From 2008 to 2018, Landsat Information 5 and 8 were adopted in this analysis, show that urbanization is increasing rapidly as well as the impact of degrees Temperature in this change, …

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Synthesis And Characterization Of Cofe2o4nanoparticles Prepared By Sol-Gelmethod, Rihab Jabbar, Sabah Sabeh, Awham Hameed Aug 2026

Synthesis And Characterization Of Cofe2o4nanoparticles Prepared By Sol-Gelmethod, Rihab Jabbar, Sabah Sabeh, Awham Hameed

Engineering and Technology Journal

Cobalt Ferrite (CoFe2O4) nanoparticles (NPs) were prepared by Sol-Gel precipitation method. Two samples were synthesized and sintered with different sintering temperatures; sample A at 400 °C and sample B at 800 °C for two hours. The prepared samples were characterized by XRD, FTIR, SEM, and AFM, Compressive test and Micro-hardness. The result showed as the sintering temperatures increased, the crystallite size increased from 10.07 nm to 15.14 nm. FTIR spectra showed two strong absorption bands in the range of 800 - 400 cm-1, confirmed formation of spinel ferrites NPs. SEM and AFM micrographs showed that the samples have an approximately …

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Impact Of Climate Change On The Spatiotemporal Distribution Of Stream Flow And Sediment Yield Of Darbandikhan Watershed, Iraq, Mahmoud S. Al- Khafaji, Rana D. Al- Chalabi Aug 2026

Impact Of Climate Change On The Spatiotemporal Distribution Of Stream Flow And Sediment Yield Of Darbandikhan Watershed, Iraq, Mahmoud S. Al- Khafaji, Rana D. Al- Chalabi

Engineering and Technology Journal

The impact of climate change on stream flow and sediment yield in Darbandikhan Watershed is an important challenge facing the water resources in Diyala River, Iraq. This impact was investigated using five Global Circulation Models (GCM) based climate change projection models from the A1B scenario of medium emission. The Soil and Water Assessment Tool (SWAT) was used to compute the temporal and spatial distribution of streamflow and sediment yield of the study area for the period 1984 to 2050. The daily-observed flow recorded in Darbandikhan Dam for the period from 1984 to 2013 was used as a base period for …

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Detection Of Biomedical Images By Using Bio-Inspired Artificial Intelligent, Hanan A. R. Akkar, Sameem A. Salman Aug 2026

Detection Of Biomedical Images By Using Bio-Inspired Artificial Intelligent, Hanan A. R. Akkar, Sameem A. Salman

Engineering and Technology Journal

Computer vision and image processing are extremely necessary for medical pictures analysis. During this paper, a method of Bio-inspired Artificial Intelligent (AI) optimization supported by an artificial neural network (ANN) has been widely used to detect pictures of skin carcinoma. A Moth Flame Optimization (MFO) is utilized to educate the artificial neural network (ANN). A different feature is an extract to train the classifier. The comparison has been formed with the projected sample and two Artificial Intelligent optimizations, primarily based on classifier especially with, ANN-ACO (ANN training with Ant Colony Optimization (ACO)) and ANN-PSO (training ANN with Particle Swarm Optimization …

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Extraction Of Rare Earth Elements From Iraqi Phosphate Ore By Using Of Tributyl Phosphate, Muna K. Abbass, Moayyed G. Jalhoom, Aya M. Kadhim Aug 2026

Extraction Of Rare Earth Elements From Iraqi Phosphate Ore By Using Of Tributyl Phosphate, Muna K. Abbass, Moayyed G. Jalhoom, Aya M. Kadhim

Engineering and Technology Journal

Iraqi phosphate ore deposits have been ascertained to be the second global reserve after Morocco, it has been utilized successfully at Al-Qaim phosphate fertilizers complex in the period 1983-2009. The deposit has valuable content of rare piles of earth and uranium, which is expected to have a good impact on the Iraqi economy if they are recovered from the ore. In the present study, solvent extraction was employed for the extraction of the rare earth elements (REEs), tributyl phosphate (TBP) in kerosene was utilized for extracting ytterbium, yttrium, erbium, and lanthanum from an aqueous solution made via the nitric acid …

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Design Of Efficient Inductive Power Link With Small Size Planar Spiral Coil Receiver For Medical Applications, Muammer M. Omran, Ahmed S. Ezzulddin, Saad Mutashar Aug 2026

Design Of Efficient Inductive Power Link With Small Size Planar Spiral Coil Receiver For Medical Applications, Muammer M. Omran, Ahmed S. Ezzulddin, Saad Mutashar

Engineering and Technology Journal

The efficiency of a WPT system greatly depends on both the geometry and operating frequency of the transmitting and receiving structures. Genetic optimizations algorithms are presented to prepare the proposed design parameters using MATLAB to optimize the link efficiency. Single and double layer PSCs are optimally designed with minimal proximity losses effect. In this paper, we used the benefit of a double layer technique to miniaturize the receiver PCS size. The proposed single layer (10×10) mm2 and double layer (8×8) mm2 PSCs are validated and simulated using HFSS 15.03 software at a frequency of 13.56MHz in both cases of the …

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The Characterization And Modeling The Mechanical Properties Of High Strength Concrete (Hsc) Modified With Fly Ash (Fa), Saman M. Kamal, Jalal A. Saeed, Ahmed Mohammed Aug 2026

The Characterization And Modeling The Mechanical Properties Of High Strength Concrete (Hsc) Modified With Fly Ash (Fa), Saman M. Kamal, Jalal A. Saeed, Ahmed Mohammed

Engineering and Technology Journal

One of the main challenges facing Civil Engineering community is to modify cement quantity in the mix design by admixtures to enhance the mechanical properties. According to more than 1000 data from literature, mechanical characteristics of concrete modified with FA were discussed. The statistical variation with modeling were achieved by set of data. The cement was replaced up to 70% with FA (weight of dry cement) and by cube of concrete testing up to 90 days of curing time and different w/c ratio. The compressive strength of concrete varied from 18-67 MPa, while, for modified concrete with FA, compressive strength …

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Preliminary Investigation On G Cement Modified By Nano-Powder, Doaa M. Abdullah, Alaa A. Abdullalhameed, Farhad M. Othman Aug 2026

Preliminary Investigation On G Cement Modified By Nano-Powder, Doaa M. Abdullah, Alaa A. Abdullalhameed, Farhad M. Othman

Engineering and Technology Journal

A proper slurry design is critical to cementing work success. In the present investigation, a ball mill method was utilized for preparing a nano powder from a cement dust material, supplied via Al-Kufa Cement Factory, to reinforce the oil well cement by utilizing it as a partial replacement of oil well cement class (G) using different weight percentages (0.25%, 0.5%, 0.75% and 1%). A mixture having water to cement ratio of (0.44) was produced. The produced samples characterizations were achieved via the Atomic Force Microscope (AFM), the X-Ray Diffraction (XRD) as well as the density and compressive strength. Results showed …

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Fabrication And Characterization For Phosphate Nanofertilizer Through Polymer Coating Technique, Azhar Haleem Aug 2026

Fabrication And Characterization For Phosphate Nanofertilizer Through Polymer Coating Technique, Azhar Haleem

Engineering and Technology Journal

Many organic and inorganic materials were used to enhance plant growth and soil fertility, in the present study phosphate and polyvinyl alcohol ( PVA) was used to prepare nanocapsules fertilizer by using Emulsification Solvent Diffusion Method (ESDM), nanocapsules of phosphate and polymer provide long-term sustained-release preparations, ensure long existence of fertilizer in attach with the plant. Particle size distribution was evaluated in addition to particle shapes were characterized by Transmission Electron Microscope (TEM), the activity of Nano-fertilizer was studied on Nigella sativa production and its extracts activity. The emulsification solvent diffusion method (ESDM) provided a good yield of P-nanofertilizer, nanoparticles …

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Enhancing Quad Tree For Spatial Index Using Space Filling Curves, Ali Hussain, Rehab Hassan Aug 2026

Enhancing Quad Tree For Spatial Index Using Space Filling Curves, Ali Hussain, Rehab Hassan

Engineering and Technology Journal

Spatial indexes, such as those based on the Quad Tree, are important in spatial databases for the effective implementation of queries with spatial constraints, especially when queries involve spatial links. The quaternary trees are a very interesting subject, given the fact that they give the ability to solve problems in a way that focuses only on the important areas with the highest density of information. Nevertheless, it is not without the disadvantages because the search process in the quad tree suffers from the problem of repetition when reaching the terminal node and return to the behavior of another way in …

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In Vivo Effect Of Different Doses Of Silver Nanoparticles On The Seminiferous Tubules In Albino Rats: Histopathological Study, Ruqayah Salman, Abdulrahman Ali, Amenah Salman Aug 2026

In Vivo Effect Of Different Doses Of Silver Nanoparticles On The Seminiferous Tubules In Albino Rats: Histopathological Study, Ruqayah Salman, Abdulrahman Ali, Amenah Salman

Engineering and Technology Journal

The study aims to investigate the effects of silver nanoparticles (Ag NPs) on the seminiferous tubules in Albino rats. Several in vitro studies have been performed in different cell models, using various nanoparticles. Pure and spherical AgNPs with an average size of 30 nm, was injected into two groups of male albino rats (6 rats for each group) in different doses. Histopathological changes in testis tissues were showed a harmful effect of the silver nanoparticles, manifested by reducing the number of spermatogenic cells, and a decrease in the number of leyidg´s cells (group 1), and hypotrophy in seminiferous and enlargement …

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An Elaborate Review For Micro-Fin Heat Sink, Ibtisam A. Hasan, Sahar R. Fafraj, Israa A. Mohmma Aug 2026

An Elaborate Review For Micro-Fin Heat Sink, Ibtisam A. Hasan, Sahar R. Fafraj, Israa A. Mohmma

Engineering and Technology Journal

Heat sinks are low cost, the process of manufacturing reliability, and design simplicity which leads to taking into consideration various cutting-edge applications for heat transfer. Like stationary, fuel cells, automotive electronic devices also PV panels cooling and other various applications to improve the heat sinks thermal performance. The aim is to focus on some countless fundamental issues in domains such as; mechanics of fluids and heat transfer, sophisticated prediction for temperature distribution, high heat flux removal, and thermal resistance reduction. The outcome of this survey concluded that the best configuration of heat sinks has a thermal resistance about (0.140 K/W …

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Experimental And Numerical Simulation For Thermal Investigation Of Oscillating Heat Pipe Using Vof Model, Anwar S. Barrak, Ahmed A. M. Saleh, Zained H. Naji Aug 2026

Experimental And Numerical Simulation For Thermal Investigation Of Oscillating Heat Pipe Using Vof Model, Anwar S. Barrak, Ahmed A. M. Saleh, Zained H. Naji

Engineering and Technology Journal

This study is investigated the thermal performance of seven turns of the oscillating heat pipe (OHP) by an experimental investigation and CFD simulation. The OHP is designed and made from a copper tube with an inner diameter 3.5 mm and thickness 0.6 mm and the condenser, evaporator, and adiabatic lengths are 300, 300, and 210 mm respectively. Water is used as a working fluid with a filling ratio of 50% of the total volume. The evaporator part is heated by hot air (35, 40, 45, and 50) oC with various face velocity (0.5, 1, and 1.5) m/s. The condenser section …

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Processing And Properties Of Za-27 Alloy Metal Matrix Hybrid Composite Reinforced With Nanonitrides, Fadhil A. Hashim, Niveen J. Abdulkader, Kateralnada F. Hisham Aug 2026

Processing And Properties Of Za-27 Alloy Metal Matrix Hybrid Composite Reinforced With Nanonitrides, Fadhil A. Hashim, Niveen J. Abdulkader, Kateralnada F. Hisham

Engineering and Technology Journal

In general, internal vibrations within the pipelines caused by fluids being passing through a pipeline system can cause. These pipeline system can damage by the sudden amplified vibrations that were not considered at the design of the system, and flow induced vibrations resonate with the pipes natural frequency. Therefore, it is important to predict and identify the pipeline system vibrations during its lifetime. In this study by using MATLAB code as a CFD solver, it studied the forced and free vibrations caused by fluid flows at Reynolds number ranged as 0 < Re < 2500 for laminar flow and ranged as 104 < Re < 105 for turbulent flow. The working fluid has chosen as of (Al2O3, TiO2, SiO2 and water) with different nanoparticle volume fraction of (0 to 2% vol.). These fluids flow in simply supported pipe with different lengths and diameters. The results presented the effect of pipe and fluid parameter upon the fluid critical velocity and fundamental natural frequencies. The results showed that the pipe natural frequency increased with increasing with decreasing the pipe length and diameter. In addition, it showed that the pipe natural frequency decreased when using the different nanoparticle depressed in the water and with increasing the volume fraction.

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Numerical Study Of Effect Of Using Nanofluids Flowing In Simply Supported Pipes On Vibrations Characteristics, Kadhum A. Jehhef, Mohamed A. Siba, Hayder S. Abdulamir Aug 2026

Numerical Study Of Effect Of Using Nanofluids Flowing In Simply Supported Pipes On Vibrations Characteristics, Kadhum A. Jehhef, Mohamed A. Siba, Hayder S. Abdulamir

Engineering and Technology Journal

In general, internal vibrations within the pipelines caused by fluids being passing through a pipeline system can cause. These pipeline system can damage by the sudden amplified vibrations that weren’t considered at the design of the system, and flow induced vibrations resonate with the pipes natural frequency. Therefore, it is important to predict and identify the pipeline system vibrations during its lifetime. In this study by using MATLAB code as a CFD solver, it studied the forced and free vibrations caused by fluid flows at Reynolds number ranged as 0 < Re < 2500 for laminar flow and ranged as 104 < Re < 105 for turbulent flow. The working fluid has chosen as of (Al2O3, TiO2, SiO2 and water) with different nanoparticle volume fraction of (0 to 2% vol.). These fluids flow in simply supported pipe with different lengths and diameters. The results presented the effect of pipe and fluid parameter upon the fluid critical velocity and fundamental natural frequencies. The results showed that the pipe natural frequency increased with increasing with decreasing the pipe length and diameter. In addition, it showed that the pipe natural frequency decreased when using the different nanoparticle depressed in the water and with increasing the volume fraction.

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The Effects Of Anodizing Process On The Corrosion Rate And Fatigue Life Of Aluminum Alloy 7075-T73, Ibrahim M. Al-Sudani, Samir A. Al-Rabii, Dhafir S. Al-Fattal Aug 2026

The Effects Of Anodizing Process On The Corrosion Rate And Fatigue Life Of Aluminum Alloy 7075-T73, Ibrahim M. Al-Sudani, Samir A. Al-Rabii, Dhafir S. Al-Fattal

Engineering and Technology Journal

This research aims to study the effect of using the anodizing process on the corrosion rate, mechanical properties as well as the fatigue life for aluminum alloy (7075-T73), which is one of the most commonly used aluminum alloy in production of aircrafts, vehicles and ships structures. The anodizing process was employed through using sulfuric acid for time (20) min in a salty atmosphere. The mechanical properties and fatigue life of the AA7075-T73 were obtained before and after the anodizing process. All the results were listed in detailed tables and figures for comparison purpose. Generally, these results showed a decrease in …

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2d Model To Investigate The Morphological And Hydraulic Changes Of Meanders, Jaafar S. Maatooq, Luay K. Hameed Aug 2026

2d Model To Investigate The Morphological And Hydraulic Changes Of Meanders, Jaafar S. Maatooq, Luay K. Hameed

Engineering and Technology Journal

River engineering investigations require some level of hydrodynamic and morphologic analysis. The detailed of the hydraulic and morphologic features through meander evolution can be recorded by the numerical model spatially and temporally. The Center for Computational Hydro-science and Engineering, two- dimensional model (CCHE2D V3.29) was adopted to investigate the hydraulic and morphologic changes through meander’s evolution. Through the experimental work, a series of experiments runs were carried out through combining different geometric and hydraulic parameters to produce different experiment conditions. These parameters are flow rate, bed slope, and different initial incised and wide channels for both rectangular and trapezoidal sections. …

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Membrane Bioreactor With External Side-Stream Membranes And High Cross Flow Velocity To Treat Municipal Wastewater, Majid A. Dixon, Talib R. Abbas, Mustafa H. Al-Furaiji, Raed H. Abed-Ali H. Abed-Ali Aug 2026

Membrane Bioreactor With External Side-Stream Membranes And High Cross Flow Velocity To Treat Municipal Wastewater, Majid A. Dixon, Talib R. Abbas, Mustafa H. Al-Furaiji, Raed H. Abed-Ali H. Abed-Ali

Engineering and Technology Journal

In this work, a pilot unit using side-stream MBR configuration was operated in BioFlow mode (i.e. no back pulse) and BioPulse mode (with intermittent back pulses) to treat municipal wastewater with relatively low MLSS. The results showed that the trans-membrane pressure (TMP) was less in the case of BioPulse over the whole period of system operation compared to that of BioFlow mode. However, the energy consumption per unit volume of permeated water is slightly higher in the case of BioFlow mode (3.4 kW.hr/m3) than that in the case of BioPulse mode (3.2 kW.hr/m3). Therefore, operation in BioPulse is preferable due …

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Design Pid Neural Network Controller For Trajectory Tracking Of Differential Drive Mobile Robot Based On Pso, Mohamed Mohamed, Mohammed Hamza Aug 2026

Design Pid Neural Network Controller For Trajectory Tracking Of Differential Drive Mobile Robot Based On Pso, Mohamed Mohamed, Mohammed Hamza

Engineering and Technology Journal

This paper introduces a nonlinear (Proportional-Integral-Derivative Neural Network) (PID NN) controller for a differential wheeled mobile robot trajectory tracking problem. This neural controller is built based on the principles of neural network (NN) and the equation of conventional structure of PID controller and is applied on kinematic model of the mobile robot. The particle swarm optimization algorithm (PSO) is utilized to find the best values of three PID NN parameters and connection weights that minimize the error between the reference path and the actual path. The results illustrate that the PID NN controller has a satisfied ability to make the …

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Evaluation Of Predictive Equations For Local Pier Scour In Cohesive Soils, Zahraa Hassan, Ibtisam Karim, Abdul- Al-Shukur Aug 2026

Evaluation Of Predictive Equations For Local Pier Scour In Cohesive Soils, Zahraa Hassan, Ibtisam Karim, Abdul- Al-Shukur

Engineering and Technology Journal

Wavelet analysis has become a powerful tool for denoising images. It represents a new way to achieve better noise reduction and increased contrast. Here,  experimentally demonstrate the abilities of the discrete wavelet transform with Daubechies basis functions for improving the quality of noisy images. In this research, two methods have been compared to modify the coefficients using a soft and hard threshold to improve the visual fineness of noisy images depending on the Root-Mean-Square error (RMS). The low RMS value and better noise reduction are found in the soft threshold methods based on Daubechies wavelet (db8) for the first image …

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Development Of Surface Roughness And Mechanical Properties Of Pmma Nanocomposites By Blending With Polymeric Materials, Hussein Sadeq, Sihama Salih, Auda Braihi Aug 2026

Development Of Surface Roughness And Mechanical Properties Of Pmma Nanocomposites By Blending With Polymeric Materials, Hussein Sadeq, Sihama Salih, Auda Braihi

Engineering and Technology Journal

This work aims to a development of mechanical properties of PMMA that is utilized in denture material, by using two types of polymers; blends (PMMA:2%NR) and (PMMA:2%SR) as a matrix materials strengthen with natural nanoparticles from the pomegranate peel powder (PPP) that were added at different weight fractions (0.0, 0.1%, 0.3%, 0.5% and 0.7%). Two groups of bio nanocomposites specimens were prepared, using (Hand Lay-Up) method. Experimental tests were carried out on surface roughness, hardness and wear rate as well as analyzing of FTIR test. The minimum values of surface roughness and wear rate were reached 1.51 nm and 0.317×10-8 …

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Design A Second Order Sliding Mode Controller For Electrical Servo Drive Systems, Shams Hashim, Ahmed Hamoudi Aug 2026

Design A Second Order Sliding Mode Controller For Electrical Servo Drive Systems, Shams Hashim, Ahmed Hamoudi

Engineering and Technology Journal

The aim of this paper is to design and study a powerful second-order sliding mode controller for electrical servo drive systems. The suggested controller can successfully overcome the chattering problem that was usually facing such systems during operation. The first (1-SMC) and second (2-SMC) sliding mode controllers are nonlinear controllers’ techniques capable of stabilizing the output of a plant, even though a disturbance and parameter uncertainty is present. The asymptotically stable is the significant property of 1-SMC as well as 2-SMC. Despite the robustness of the 1- SMC, in real-time but it suffers from a large settling time and a …

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Effect Of Weather Conditions On The Properties Of Cement Rendering, Ayad Mseer Aug 2026

Effect Of Weather Conditions On The Properties Of Cement Rendering, Ayad Mseer

Engineering and Technology Journal

The cement mortar used in rendering external walls, in Iraqi hot weather summer, suffers from appearance of many cracks on surface during and after its setting. So, this research aims to study the effect of different factors that can affect those cracks. The studied variables include mix proportions of mortar, grading of the used sand, method of curing, and environmental temperature (rendering during winter or summer). The rendering was laid on two types of walls build from clay bricks or concrete blocks. Tests were carried out on the mortar mixes of the different variables including flow test and drying shrinkage. …

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Study Compression, Hardness And Density Properties Of Pmma Reinforced By Natural Powder Used In Denture Base Applications, Jawad Oleiwi, Q. Hamad, N. Kadhim Aug 2026

Study Compression, Hardness And Density Properties Of Pmma Reinforced By Natural Powder Used In Denture Base Applications, Jawad Oleiwi, Q. Hamad, N. Kadhim

Engineering and Technology Journal

This research had been done to investigate the effect of adding natural powder of Pistachio Shell to PMMA, which popularly used in denture applications. The powder added in different weights fraction (3%, 6%, 9%, and 12%), and different average particle size (53µm, 106 µm, 150 µm, and 212µm %), and studying Compression Strength, Surface Hardness, and Density properties. Hand Lay-Up represented the method used to prepare the specimens in this research. The results were statistically analyzed by SPSS (one-way ANOVA) to determine the mean value and showed a significant difference for each particle size. The highest value of compression strength …

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The Synergic Effect Of Fly Ash And High Reactivity Attapulgite In Ternary Blended Cement, Shubbar Al-Obaidey Aug 2026

The Synergic Effect Of Fly Ash And High Reactivity Attapulgite In Ternary Blended Cement, Shubbar Al-Obaidey

Engineering and Technology Journal

The main objective is to study the synergic effect of fly ash (FA) and high reactivity Attapulgite (HRA) together in ternary blended cement of (OPC+FA+HRA) and evaluate the efficiency factor of FA and HRA in binary blended cement and (FA+HRA) in ternary blended cement. To achieve this objective compressive strength of binary blended cement mixes of (OPC+FA) with FA replacement percentages of (20 %, 30% and 40%), (OPC+HRA) with HRA replacement percentages of (5 and 10%) by weight of cement and ternary blended cement mixes of (OPC+FA+5% and/or 10%HRA). Were tested and compared with that of reference mix at ages …

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Experimental Study Of Vibration On Pipe Conveying Fluid At Different End Conditions For Different Fluid Temperatures, Kayser Ameen, Mustafa Al-Dulaimi, Ali Hatem Aug 2026

Experimental Study Of Vibration On Pipe Conveying Fluid At Different End Conditions For Different Fluid Temperatures, Kayser Ameen, Mustafa Al-Dulaimi, Ali Hatem

Engineering and Technology Journal

Dynamic behavior of a copper pipe conveying fluid at different fluid temperatures is investigated experimentally. Three types of supports are used, which are simply support - simply support, fixed – fixed support and fixed – free support. The effect of the support's types on the frequency and the amplitude of vibration for the pipe conveying the fluid are studied for various flow temperature. These vibration characteristics were tested at temperatures 50, 65 and 80 ºC

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Numerical Study Of Bond Stress-Slip Relationship In Large Scale Reactive Powder Concrete Beams, Eyad Sayhood, Sameh Tobeia, Ammar Ali Aug 2026

Numerical Study Of Bond Stress-Slip Relationship In Large Scale Reactive Powder Concrete Beams, Eyad Sayhood, Sameh Tobeia, Ammar Ali

Engineering and Technology Journal

As the reactive powder concrete (RPC) represents one of the ultra-high performance concrete types that recently used in public works and in the presence of several attempts that aims to examine the behavior of RPC, this work aims to theoretically study the bond stress between RPC and steel bars and the corresponding slip for large reactive powder concrete beams by using finite element models done by ANSYS 16.1 software. Where, these numerical models were verified through several comparisons between their results, and the experimental one from previous work, in which good agreement were achieved. The effects of several parameters on …

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Ethical Responsibility In The Practice Of Architecture, Abdullah Almaamouri Aug 2026

Ethical Responsibility In The Practice Of Architecture, Abdullah Almaamouri

Engineering and Technology Journal

The research deals with the concept of ethical responsibility as one of the most influential concepts in the process of practicing architecture. It is defined as “systems of ethical principles and engineering rules governing the architect in making decisions of design practice, making them sound, preventing them from making mistakes during the stages of design, and the maintenance “by the commitment to them, result in creative architectural texts benefit the individual and society,” and thus determine the research problem in (Lack of cognitive perception of the role of moral responsibility in the practice of architecture). Therefore, the research aims at …

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An Experimental Investigation On Thermal Efficiency Of Flat Plate Tube Solar Collector Using Nanofluid With Solar Tracking Mechanism, Saad Hamidi Aug 2026

An Experimental Investigation On Thermal Efficiency Of Flat Plate Tube Solar Collector Using Nanofluid With Solar Tracking Mechanism, Saad Hamidi

Engineering and Technology Journal

In the present work, flat-plate solar collector (FPSC) in terms of various parameters as well as in respect of lower (Area of FPSC, volume fraction concentration of nanofluids, and mass flow rate) has been studied in this work. The FPSC has been fabricated with 0.192 m2, Dioxide silicon SiO2 (40nm) with the volume fraction of SiO2+Distilled water (0.05, 0.075, and 0.1%) and varying of flow rate (10, 15, 20L/h). These technological devices operate under forced circulation mode of fluid under varying climate conditions. The tracking mechanism has been used in the experiment of FPSC for tracking the sun position during …

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