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The Visual Quality Of Healthy Eye Lens For Different Tilt Effects, Laith Tawfeeq, Ali Al-Hamdani Mar 2026

The Visual Quality Of Healthy Eye Lens For Different Tilt Effects, Laith Tawfeeq, Ali Al-Hamdani

Engineering and Technology Journal

The importance and accuracy of the human visual system have led scientists and researchers to do their best to study it, know its problems, and how to treat them.The eye lens tilt is possibly due to a specific accident such as a blow or the like. So, this manuscript was submitted to study the human eye lens tilting effect on visual performance and determine the tolerance tilt values. Using (ZEMAX-EE) software program and relying on the Liou and Brennan model Eye (LBME), one of the most accurate models for studying the eye, and some basic criteria used to describe the …

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Power Quality Examination For (250kw) Pv Grid-Tied Connected At Various Irradiance Levels, Ahmed Jasim, Dahri Mahmood, Oday Ahmed Mar 2026

Power Quality Examination For (250kw) Pv Grid-Tied Connected At Various Irradiance Levels, Ahmed Jasim, Dahri Mahmood, Oday Ahmed

Engineering and Technology Journal

Although using a PV grid-tide system has many advantages, connecting the PV to the grid creates a new challenge at the power quality level. The PV grid-tide plant (250 kW), implemented at the Iraqi ministry of electricity building, was taken as a case steady to examine the power quality issue at various irradiance levels. The plant was described in detail and built using MATLAB2018b/Simulink. The developed system was examined at various irradiance levels. The results showed that an increased irradiance level leads to an enhancement in the power quality. The total harmonic distortion (THD) decreases with the increase of irradiance. …

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An Enhanced Interface Selectivity Technique To Improve The Qos For The Multi-Homed Node, Haider Oleiwi, Nagham Saeed, Heba Al-Taie, Doaa Mhawi Mar 2026

An Enhanced Interface Selectivity Technique To Improve The Qos For The Multi-Homed Node, Haider Oleiwi, Nagham Saeed, Heba Al-Taie, Doaa Mhawi

Engineering and Technology Journal

The user’s handoff is still an arguable issue that many mobile communication systems face, especially with the exploded growth of users and internet-based applications. There is a critical need for adequate quality of service (QoS) to meet the stringent requirements. This paper aims to study the overall performance and feasibility of several QoS mechanisms with the single-homed and multi-homed networks/nodes fluctuating resource availability. It investigates the adaptability of multi-interfaced multi-homed techniques to enhance the essential governing parameters, i.e., throughput, end-to-end latency, processing time, and jitter. Moreover, the paper introduces an interface selectivity technique for the multi-homed node to adopt the …

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Numerical And Theoretical Analysis Of A Spur Gear Using Composite And Conventional Materials, Jwan Mohammed, Dlair Ramadan Mar 2026

Numerical And Theoretical Analysis Of A Spur Gear Using Composite And Conventional Materials, Jwan Mohammed, Dlair Ramadan

Engineering and Technology Journal

A spur gear is one of the most common forms of precision cylindrical gear. In the industry, reducing the weight of gears while keeping their useful properties has become an even more pressing challenge. As a result, the investigators have made many attempts to reduce the weight of the gears. Despite these efforts, the problem still requires more research. This study presented a spur gear's modeling and finite element analysis using different materials. A three-dimensional spur gear was designed, modeled, and simulated using ANSYS software. Five different materials, including two conventional materials (stainless steel and copper alloy) and three different …

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Experimental Study On The Effect Of Aspect Ratio On Flexural Behavior Of Aluminum Sandwich Composite, Ganesh Radhakrishnan, Al Haitham Al Hattali, Al Muntasser Al Yahyai, Al Muntasser Al Riyami, Al Muatasim Al Hadhrami Mar 2026

Experimental Study On The Effect Of Aspect Ratio On Flexural Behavior Of Aluminum Sandwich Composite, Ganesh Radhakrishnan, Al Haitham Al Hattali, Al Muntasser Al Yahyai, Al Muntasser Al Riyami, Al Muatasim Al Hadhrami

Engineering and Technology Journal

Sandwich composites are one such kind of light-weight composites developed for structural and vehicle body buildings etc. Due to their remarkable features such as high specific strength, high toughness and resistance to inter laminar shear strength. In this study, commercially available aluminium sandwich composite (ASC) laminate was considered for investigating its flexural behavior and buckling behavior as it was mostly used for various structural applications. Flexural analysis was done for different aspect ratios in order to analyze the influence of cross section of the specimen and support span on the flexural capability of the sandwich beam. The composite specimens prepared …

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Study Effect Of Exhaust Gas Recirculation Upon Emissions And Performance By Using European Diesel And Iraqi Diesel, Lina Jamal, Adel Saleh Mar 2026

Study Effect Of Exhaust Gas Recirculation Upon Emissions And Performance By Using European Diesel And Iraqi Diesel, Lina Jamal, Adel Saleh

Engineering and Technology Journal

This study investigated the effect of exhaust gas re-circulation (EGR) on performance and exhaust emissions in a single-cylinder, air-cooled, and direct-injection diesel engine. The Iraqi diesel fuel (D100) and European diesel fuel (ED100) were utilized at different speeds from (2100 to 3300 in intervals of 300) using the recycling of exhaust gas by a ratio (0%, 5%, 10%, 15%, and 20%. The study showed that European diesel fuel positively impacts engine performance and emissions. Compared to Iraqi diesel fuel, European decreased diesel fuel the brake-specific fuel consumption by (10.96%), increased brake thermal efficiency by (8.67%), decreased exhaust gas temperature by …

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Economic Operation Of Low Voltage Smart Micro-Grid With Integration Of Renewable Energy, Kadhim Jabber, Mohammed Al-Saadi, Ameer Jaddoa Mar 2026

Economic Operation Of Low Voltage Smart Micro-Grid With Integration Of Renewable Energy, Kadhim Jabber, Mohammed Al-Saadi, Ameer Jaddoa

Engineering and Technology Journal

This paper develops a unit commitment multi-period energy management system to minimize a low voltage microgrid's total operation and emission cost. The optimization problem is formulated in the mixed-integer quadratic program. The environment cost and battery degradation cost are taken into consideration in the proposed optimization approach. The unit commitment strategy is employed to minimize the total cost. A set of constraints are considered in the proposed optimization approach. The proposed energy management system is applied to the low voltage distribution grid, including different distributed generators, such as diesel engines, fuel cells, and microturbines. The microgrid also contains storage batteries, …

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Numerical Investigation Of A Window Solar Air Collector With Moveable Absorber Plates, Norhan Dawood, Jalal Jalil, Majida Ahmed Mar 2026

Numerical Investigation Of A Window Solar Air Collector With Moveable Absorber Plates, Norhan Dawood, Jalal Jalil, Majida Ahmed

Engineering and Technology Journal

Window solar air collector is an imperative instrument for heating residential buildings in cold regions. This paper presents a numerical investigation of the thermal performance of a window solar air collector with seven moveable absorber plates. With glass on the front and back sides of the collector. By the use of FORTRAN 90; The three-dimensional steady-state turbulent forced convection method was used to solve the Navier-Stokes equations. The seven plates opened and closed at different angles in unison manually by a specific mechanical mechanism. The effect of changing the plate angles has been tested, alongside the effect of airflow rates …

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Electrostatic Deposition Of Poly(Methyl Methacrylate)/Titanium Carbide Coatings On Austenitic 316l Stainless Steel Implant, Ghofran Dhafer, Mohanad Al-Shroofy, Hanaa Al-Kaisy Mar 2026

Electrostatic Deposition Of Poly(Methyl Methacrylate)/Titanium Carbide Coatings On Austenitic 316l Stainless Steel Implant, Ghofran Dhafer, Mohanad Al-Shroofy, Hanaa Al-Kaisy

Engineering and Technology Journal

316L stainless steel alloys are extensively used in orthopedic applications for the fixations and substitutions of defective bone tissues in the human body because of their excellent combination of mechanical and biological behavior. However, just like other metallic implants, they tend to release some toxic ions that may lead to serious health issues. Therefore, this study attempts to increase the alloy's resistance against corrosion while maintaining its good mechanical properties by applying a modified coating layer of PMMA-based composites titanium carbide as reinforcement material using dry electrostatic spray deposition (ESD) under constant conditions (25 kV, 15-20 cm distance, compressed air …

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Studying The Effect Of Un Coated And Multilayer Coated Tools On Cutting Temperature In Turning Operation, Farhan Challab, Maan Tawfiq, Salah Jawad Mar 2026

Studying The Effect Of Un Coated And Multilayer Coated Tools On Cutting Temperature In Turning Operation, Farhan Challab, Maan Tawfiq, Salah Jawad

Engineering and Technology Journal

The present work studies three variables (cutting velocity, feed rate, and cut depth) on hard turning cutting temperature of uncoated and multilayer-coated carbide (TiN, TiN/TiCN, TiN /Al2O3/ TiCN) inserts are used in AISI 1045 alloy steel. The tool's temperature was measured simultaneously, measuring the temperature of the tool-chip interface using infrared radiation (IR) pyrometer in this investigation.  This study investigated the performance of four distinct coated and uncoated PVD and CVD tools during turning operations. Four cutting speeds (56, 88, 112, 141) m/min, four feed rates (0.065, 0.08, 0.16, 0.228) mm/rev.,  in the experiments, a constant cutting depth of (1) …

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Study The Growth Of Apatite Layer On Biodegradable Glass As Bioactive Scaffolds, Zainab Dhary, Alaa Atiyah, Saad Farid Mar 2026

Study The Growth Of Apatite Layer On Biodegradable Glass As Bioactive Scaffolds, Zainab Dhary, Alaa Atiyah, Saad Farid

Engineering and Technology Journal

Bioglass offers a variety of uses for tissue engineering due to its good biocompatibility and chemical composition, similar to a mineral portion of the body. The synthesis of bioglass 13-93 scaffold was achieved by salt leaching technique, and potassium chloride (KCl) was used as porogen with particle sizes of (200-250) μm. Then, sintering to 750 ◦C for around 1 hour was performed. The resultant materials were examined by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). They were immersed in a solution of simulated body fluids (SBF) for 7 and 14 days, respectively. Initially, calcium …

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Synthesis Zno Heterostructured Nanophotocatalyst Simulated Solar Light Irradiation For Removal Contaminate Carbamazepine In Aqueous Solution, Eman Rdewi, Ahmed Abdulkadhim Al-Ghaban, Khalid Abbas Mar 2026

Synthesis Zno Heterostructured Nanophotocatalyst Simulated Solar Light Irradiation For Removal Contaminate Carbamazepine In Aqueous Solution, Eman Rdewi, Ahmed Abdulkadhim Al-Ghaban, Khalid Abbas

Engineering and Technology Journal

In this study, zinc oxide nanoparticles (ZnO) were produced in aqueous media to photodegrade harmful carbamazepine compounds (CBZ) in aqueous solution under simulated solar-light using the sol-gel technique with zinc chloride and NaOH as precursors. X-ray diffraction (XRD), FTIR analysis, Field Emission Scanning Electron Microscopy (FE-SEM), and UV–vis diffuse reflectance spectra (UV-vis DRS) were used to analyze the ZnO NPs powder. According to the XRD results, ZnO nanoparticles showed a hexagonal symmetry shape with 13 nm particle size value. The absorption bands of ZnO nanoparticles were identified using FT-IR spectra peaking. The ZnO nanoparticles produced in this work are spherical, …

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Effect Of Abrasive Water Jet (Awj) Parameters On Materials Removal Rate For Low Carbon Steel, Ameer Nader, Saad Shather Mar 2026

Effect Of Abrasive Water Jet (Awj) Parameters On Materials Removal Rate For Low Carbon Steel, Ameer Nader, Saad Shather

Engineering and Technology Journal

Abrasive water jet (AWJ) is one of the most advanced and valuable non-traditional machining processes because of its massive advantages of removing metal from hard and soft metals. This paper has studied the effect of jet pressure, feed rate, and standoff distance on material removal rate throughout abrasive water jet cutting of carbon steel metal workpieces. The material removal rate was assessed using a precision balance device by performing sixteen experiments to identify the ratio of weight loss to total cutting time. The Taguchi method was introduced to implement the experiments and indicate the most influential process parameters on material …

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Improvement Of Metal Forging Processes By Stresses And Temperatures Analysis, Adnan Mohammeda, Ibrahim Ahmed, Munir Allow Mar 2026

Improvement Of Metal Forging Processes By Stresses And Temperatures Analysis, Adnan Mohammeda, Ibrahim Ahmed, Munir Allow

Engineering and Technology Journal

The mechanical components are produced by various fabrication methods, although forged products have excellent mechanical characteristics at a minimal cost. The stress and temperature analysis process in the closed die hot forging contributed to finding failure regions in these dies through simulations in the FE program. This enables the process to be improved and reduced time and mineral losses. A simplified model was used to represent the forming process, with a temperature of (1150-950 °C) was simulated using MSC Simufact software. The forge fastener head product is formed with a horizontal mechanical press of 800 tones. In this research, the …

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Influence Of Machining Parameters On Surface Roughness In Chemical Machining Of Silicon Carbide (Sic), Naeem Abdulhusein, Abbas Ibrahim, Abdullah Huayier Mar 2026

Influence Of Machining Parameters On Surface Roughness In Chemical Machining Of Silicon Carbide (Sic), Naeem Abdulhusein, Abbas Ibrahim, Abdullah Huayier

Engineering and Technology Journal

This study discussed the influence of chemical machining parameters such as (machining time, type of etchant, etching temperature, and concentration of the solution) on the surface roughness of ceramic material (silicon carbide) as a workpiece in the chemical machining (CHM) process. To achieve the best value for surface roughness. In this research, four levels of factors affecting the chemical etching process were used, the values of etching temperature (60, 80, 100, and 120) °C, the etchant concentration (50, 60, 70, and 80) %, and machining time (30, 50, 70, and 90) min, and two etchant type (HBr, HCl). Experiments proved …

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Preparation Of Cuo/Zno Nano-Particles Using Sol-Gel Technique And Studying The Characterization, Doaa Yassen, Farhad Othman, Alaa Abdul Hamead Mar 2026

Preparation Of Cuo/Zno Nano-Particles Using Sol-Gel Technique And Studying The Characterization, Doaa Yassen, Farhad Othman, Alaa Abdul Hamead

Engineering and Technology Journal

Copper oxide (CuO) and zinc oxide (ZnO) are two of the most promising oxides under development right now. The sol-gel technique was used to make Nano composite particles NCPs of ZnO-CuO. The copper (II) nitrate rehydrate 0.1M and zinc nitrate hex hydrate 0.1M liquids were mixed in a 1:1 ratio, and the gel was formed at 80 °C, then dried and calcined for various times 500 °C (3, 5, and 7 hours). Particle size analyzer (PZA), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and apparent density were used to characterize the CuO/MgO particles. The x-ray diffraction results showed …

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Effect Of Voltage On Electrode Wear Rate (Ewr) In The Electrical Discharge Machining (Edm) For Stainless Steel Aisi 444, Shukry Aghdeab, Anwer Abdulnabi Mar 2026

Effect Of Voltage On Electrode Wear Rate (Ewr) In The Electrical Discharge Machining (Edm) For Stainless Steel Aisi 444, Shukry Aghdeab, Anwer Abdulnabi

Engineering and Technology Journal

Electrical Discharge Machining process (EDM) is a nontraditional metal removal technique that uses thermal energy to erode the workpiece without generating any physical forces of cutting between the tool and the machining part. It is used to cutting of hard and electrical conductivity materials and product intricate shapes of products. The aim of this work is to study the effect of changing voltage values on electrode wear rate (EWR). The machining parameters includes voltage (V), peak current (Ip), pulse duration (Ton) and finally, pulse interval (Toff). The results show that the EWR was increase with rising in voltage, peak current …

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Properties Of Welded Copper Tubes Fabricated Via Friction Crush Welding, Abdul Jabbar Jomah, Akeel Subhi, Fadhil A. Hashim Mar 2026

Properties Of Welded Copper Tubes Fabricated Via Friction Crush Welding, Abdul Jabbar Jomah, Akeel Subhi, Fadhil A. Hashim

Engineering and Technology Journal

The welding process is one of the fabrication processes in which tubes can be performed for structural purposes and transport liquids or gases. This study is focused on the manufacturing, characterization, and evaluation of mechanical properties of welded tubes made from oxygen-free copper (C1020) sheets using friction crush welding. The welded tubes were produced using different tool rotation speeds (1500, 1600, and 1700 rpm) and feed rates (130, 140, and 150 mm/min). The flanged edge height of 2.5 mm and 0.5 mm gap between the ends of the copper sheet was used. All examinations on welded tubes were achieved using …

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Structural Characterization Of (Mg(1-X)Pbxo)-Nps By Modified Pechini Method, Israa Najem, Fadhil Abd Rasin, Shaker Edrees Mar 2026

Structural Characterization Of (Mg(1-X)Pbxo)-Nps By Modified Pechini Method, Israa Najem, Fadhil Abd Rasin, Shaker Edrees

Engineering and Technology Journal

The structural characterization was discussed in the present paper of the pure MgO nanoparticles and the doped (Mg(1-x)pbxO) nanoparticles specimens, where (0 ≤ x ≤ 0.03). The modified Pechini method was used to prepare all the specimens. From (DTA), the convenient temperature of decomposition from Mg(OH)2 to MgO was above 375°C. The structure investigation (XRD) revealed that all the specimens have identical space groups and index well to cubic structures. The obtained crystallite size by Scherrer''s equation was increased with increasing the fraction of doping except for (Mg0.97Pb0.03O) due to the formation of PbO oxide. The molecular vibration by FTIR …

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Mechanical Performance Of Blended Fly Ash-Based Geopolymer Concrete With Ggbs And Metakaolin, Ali Ali, Tareq Al-Attar, Waleed A. Abbas Mar 2026

Mechanical Performance Of Blended Fly Ash-Based Geopolymer Concrete With Ggbs And Metakaolin, Ali Ali, Tareq Al-Attar, Waleed A. Abbas

Engineering and Technology Journal

One of the most user-friendly alternatives to ordinary concrete is geopolymer concrete(GPC), which achieves the same result. GPC is a unique substance made by activating source materials with a high concentration of silica and alumina. As a result, geopolymer binders use less raw resources and emit less carbon dioxide. For these reasons, most academics are focusing on these sorts of resins to develop eco-friendly housing. This article reports on an experimental investigation that examined the Mechanical Performance of Blended Fly Ash based Geopolymer concrete at 7,28 and 360 days made with two different activator solution molarities and varying R (SiO2/Al2O3) …

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Effect Of Domestic Dry Sewage Sludge On Concrete Compressive Strength, Alaa Al-Obaidi, Riyad Al-Anbari, Maan Hassan Mar 2026

Effect Of Domestic Dry Sewage Sludge On Concrete Compressive Strength, Alaa Al-Obaidi, Riyad Al-Anbari, Maan Hassan

Engineering and Technology Journal

The possibility of saving and sustaining natural materials by reusing waste is one of the most important goals researchers seek to achieve and prove its effectiveness and positive impact on the environment. In this study, domestic wastewater sludge was utilized in concrete production as partial cement changing with different ratios (0, 5, 10, and 15) % with dry sludge. The study showed that the compressive strength test showed that the partial replacement of cement by dry sludge caused reduction increased directly with the increase of sludge ratio compared with concrete reference specimens. The study found that dry sludge can be …

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The Effect Of Scrap Tires Recycled Steel Fibers On Some Hardened Properties Of Green Scc, Nadeem Salam, Wasan Khalil Mar 2026

The Effect Of Scrap Tires Recycled Steel Fibers On Some Hardened Properties Of Green Scc, Nadeem Salam, Wasan Khalil

Engineering and Technology Journal

The purpose of this study is to investigate some hardened properties of green self-compacting concrete (GSCC) with 15% volumetric replacements of crushed clay brick waste as coarse aggregate and reinforced with scrap tires recycled steel fibers (STRSF) with 0, 0.25, 0.5and 0.75%volume fraction and 40 as an aspect ratio. Also, a combination of two STRSF aspect ratios of 40 and 60 was used in GSCC as hybrid fiber reinforcement (0.25 and 0.25%, 0.5 and 0.25%, 0.25 and 0.5% of aspect ratios 40 and 65, respectively). Scrap tires recycled steel fibers had been used to improve the properties of the green …

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Identifying Risk Factors Influencing Traffic Accidents For Baghdad Expressways, Hasan Joni, Mustafa Jasim Mar 2026

Identifying Risk Factors Influencing Traffic Accidents For Baghdad Expressways, Hasan Joni, Mustafa Jasim

Engineering and Technology Journal

In this paper, the SPSS program (version 25) and Binary Logistic Regression Model were used to implement and identify the risk factors that affect traffic accidents on Baghdad highways. Due to the increase in the number of traffic accidents that led to injuries and deaths in Iraq during the past years and the lack of specialized studies in traffic accidents, especially on highways, this required the preparation of a study to know the causes of accidents and to explore the factors that have a relative impact on (the severity of the accident). Four highways in the capital, Baghdad, were chosen …

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Investigation Of The Bearing Capacity And Collapsibility Of Gypseous Soil Using Geotextile Reinforcement, Qasim Al-Obaidi, Makki Mohsen, Ayad Asker Mar 2026

Investigation Of The Bearing Capacity And Collapsibility Of Gypseous Soil Using Geotextile Reinforcement, Qasim Al-Obaidi, Makki Mohsen, Ayad Asker

Engineering and Technology Journal

This study aims to increase the bearing capacity of the soil by using geosynthetics in a single, double, or triple distribution pattern. The gypseous soil samples were brought from a site near Sawa Lake in Al-Muthanna Governorate with a gypsum content of about (37%), the Soil-Model apparatus of dimensions (60 × 60 × 50) cm with the proposed square footing of dimensions (10 × 10) cm are used in the experimental program of this study. To achieve this goal, a series of (48) different model tests were used on gypseous soil subjected to vertical stress in both dry and wet …

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Managing The Excess Floodwaters In The Lake Hemrin Using Remote Sensing And Gis Techniques, Hussain Muhamed, Mustafa Hamoodi, Abd Alrazzak Ziboon Mar 2026

Managing The Excess Floodwaters In The Lake Hemrin Using Remote Sensing And Gis Techniques, Hussain Muhamed, Mustafa Hamoodi, Abd Alrazzak Ziboon

Engineering and Technology Journal

Lake Hemrin is located in the middle east of Iraq, about 50 km from the Iraqi-Iranian border. The lake is the main fish source and provides water for nearby farms. However, due to various socio-economic and environmental management issues, the Hemrin system is a difficult water resources challenge. Moreover, Lake Hemrin receives floodwaters annually over its storage capacity; therefore, there is a risk of flooding in the areas downstream of the lake. To this end, this research developed optimization solutions to design flood escape paths in the area using Analytic Hierarchy Process (AHP) and Genetic Algorithm (GA). Among three initial …

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Numerical Simulation Of The Effect Of Repeated Load And Temperature On The Behavior Of Asphalt Layers, Hind Akram, Miami Hilal, Mohammed Fattah Mar 2026

Numerical Simulation Of The Effect Of Repeated Load And Temperature On The Behavior Of Asphalt Layers, Hind Akram, Miami Hilal, Mohammed Fattah

Engineering and Technology Journal

Roads and highways are used by different vehicle types, and the heavy vehicles among them can be considered the most critical in loading, which causes failure in the pavement structure and increases rehabilitation and maintenance costs. In this study, the composite effects for wheel loads and temperature were considered in the finite element analysis using Abaqus 6.14. The asphalt layer was modeled as an elastic material, while the base and subbase layers were modeled as an elastoplastic material following the Mohr-Coulomb model. Also, the impact of wheel loads on flexible pavement settlement and the main output of analyzing pavement structure …

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Effect Of Wire-Mesh Type On Strengthening Reinforced Concrete Beams, Basil S. Al-Shathr, Haider A. Abdulhameed, Mohammed Mahdi Mar 2026

Effect Of Wire-Mesh Type On Strengthening Reinforced Concrete Beams, Basil S. Al-Shathr, Haider A. Abdulhameed, Mohammed Mahdi

Engineering and Technology Journal

Structural strengthening is a method of application to raise the load-ability capacity of building structures to meet the building's need to carry additional and unexpected loads that were not accounted for in the main design. In this study, Ferro-cement was used for strengthening concrete beams. Three locally available wire mesh types were used with an ordinary cement mortar to strengthen reinforced concrete beams under flexural loading. The results show that using a Ferro-cement layer with wire mesh of 15 mm size square opening has the best effect on increasing reinforced concrete beams' bearing capacity and deflection more than when using …

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Structural Behavior Of Ultra-High-Performance Concrete Beams Under Flexural And Shear Action: A Review, Adil Jabbar, Mohammed Hamood, Dhiyaa Mohammed Mar 2026

Structural Behavior Of Ultra-High-Performance Concrete Beams Under Flexural And Shear Action: A Review, Adil Jabbar, Mohammed Hamood, Dhiyaa Mohammed

Engineering and Technology Journal

Ultra-high performance concrete (UHPC) has a higher tensile strength than conventional concrete by about 6-times, besides a compressive strength greater than 150 MPa. It also exhibits linear and non-linear behavior on loading because of strain hardening and strain softening in compression and tension. Therefore, the effect of these mechanical properties can reflect in the beam behavior produced by UHPC. This paper deals with the methods and approaches adopted by some guidelines and recommendations that transact with the analysis and design of UHPC beams. The prevalent style of the methods is based on the equilibrium of the beam's section for the …

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Modeling Critical Gap Of Al Turkmani Roundabout In Baghdad City, Laith Shadhan, Zainab Alkaissi Mar 2026

Modeling Critical Gap Of Al Turkmani Roundabout In Baghdad City, Laith Shadhan, Zainab Alkaissi

Engineering and Technology Journal

Interest in how roundabouts can most effectively be used continues to increase to achieve goals of safety, efficiency, along with other benefits. This research presents the most important element of the operational performance of roundabout traffic intersections in Baghdad city on capacity analysis. The obtained results for critical headway time are (3.35 sec) and (2.8 sec) for the Main west and East approaches. Also, the critical gap value for the West and East approach is less than the range of (NCHRP 572), possibly attributed to the congested traffic volume in  Al Turkman roundabout with aggressive driver behavior. Calculating in the …

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Environmental Investigation Of Bahar Al-Najaf Region Using Sentinel-2 Images, Mustafa Al-Helaly, Imzahim Alwan, Amjed Al-Hameedawi Mar 2026

Environmental Investigation Of Bahar Al-Najaf Region Using Sentinel-2 Images, Mustafa Al-Helaly, Imzahim Alwan, Amjed Al-Hameedawi

Engineering and Technology Journal

This study aims to shed light on the indicators of environmental change and environmental impact assessment during the past five years in a representative area of the western part of Iraq (BAHAR-ALNAJAF). This is to understand the leading causes that led to the environmental changes from (2016 to 2020) due to the change in land cover in the study area. The paper refers to an environmental study for the study area using satellite data within the software environment (ArcGIS) and the application of remote sensing from two aspects: Ecological indices retrieval and the monitoring environment for land cover. Remote sensing …

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