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Articles 19891 - 19920 of 1103636

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Fresh Properties Of Self-Consolidating Expired Cement-Fly Ash Cold Bonded Lightweight Aggregate Concrete With Different Mineral Admixtures, Haider Ibrahim, Waleed Abbas Mar 2026

Fresh Properties Of Self-Consolidating Expired Cement-Fly Ash Cold Bonded Lightweight Aggregate Concrete With Different Mineral Admixtures, Haider Ibrahim, Waleed Abbas

Engineering and Technology Journal

The experimental program evaluated the fresh properties of self-consolidating lightweight concretes (SCLC) produced from expired cement EC cold-bonded lightweight coarse aggregates (ALA) with silica fume (SF) and fly ash (FA). Twelve mixtures of SCLC were prepared, the binder in the control mix was just Portland cement (PC), whereas other mixes included binary and ternary of (PC), 20% of (FA), and/or (10%) of (SF) with (0%, 50%, and 100%) as partial replacement of (ALA) with coarse natural aggregates. Fresh features of (SCLC) were evaluated by measuring their slump flow diameter, T500 slump flow time, V-funnel flow time L-box height ratio, and …

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Impact Of Dam Materials And Hydraulic Properties On Developing The Breaching Dimensions, Mahmood Mohamed, Ibtisam Karim, Mohammed Fattah Mar 2026

Impact Of Dam Materials And Hydraulic Properties On Developing The Breaching Dimensions, Mahmood Mohamed, Ibtisam Karim, Mohammed Fattah

Engineering and Technology Journal

Dam safety is an important issue as it directly influences environmental and life losses. Embankment material and embankment core are important factors that contribute to determining the size and hydraulic characteristics of the breach that occurs due to dam failure. The current topic is to present the analysis of the impact of the dam materials properties and hydraulic characteristics on breach dimensions due to overtopping failure using 2D-HEC-RAS software with the aid of RAS-Mapper. The analysis was made by Digital Elevation Model (DEM) conversed to a Triangular Irregular Network (TIN), then the 2D area of the dam was determined and …

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Soft Computing Models To Predict The Compaction Characteristics From Physical Soil Properties, Hunar Hama Ali Mar 2026

Soft Computing Models To Predict The Compaction Characteristics From Physical Soil Properties, Hunar Hama Ali

Engineering and Technology Journal

In almost every earthwork, it is essential to compact soil so that the densest possible state of the soil can be achieved. The suitability of soil for earthworks relies on the compaction characteristics; Optimum Moisture Content (OMC), and Maximum Dry Density (MDD). The determination of the compaction characteristics in the laboratory, for a vast volume of soil, is time-consuming. Therefore, for the initial assessment of soil, it is crucial to determine the compaction characteristics from physical soil properties. In this work, three different models of the Artificial Neural Network (ANN), M5P-tree, and Multiple Linear Regression (MLR) are used to predict …

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Future Water Requirements And Crop Productivity At Al-Najaf Governorate Under Different Climate Change Scenarios (2020–2080), Noor Sabah, Mustafa Al-Mukhtar, Khalid Shemal Mar 2026

Future Water Requirements And Crop Productivity At Al-Najaf Governorate Under Different Climate Change Scenarios (2020–2080), Noor Sabah, Mustafa Al-Mukhtar, Khalid Shemal

Engineering and Technology Journal

This study aims to predict the effect of climate change on net irrigation water requirements (NIWR) and agricultural productivity from five common crops (wheat, barley, summer maize, and sorghum) in the Al-Najaf Governorate in Iraq. GFDL-ESM2M mode was used to predict the lower and upper temp and precipitation for two time periods (2020-2080) with 30 years for two periods (P1 and P2) under representative concentrations paths (RCP 2.5, RCP6, and RCP8.5). The CROPWAT model is used to determine NIWR, and the extreme learning model was used to estimate agricultural yields using previous crop yield production and weather data, supported vectors …

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Variability Analysis Of The Behaviors Of A Lateritic Soil Profile As A Structural Material, Chidobere Nwa-David, Festus Onyeka Mar 2026

Variability Analysis Of The Behaviors Of A Lateritic Soil Profile As A Structural Material, Chidobere Nwa-David, Festus Onyeka

Engineering and Technology Journal

The desideratum of determining the behavior of the underlying soil on which the foundations will be laid is indisputable. This study evaluates the strength characteristics of lateritic soil material at a new construction site opposite College of Engineering and Engineering Technology (CEET), Michael Okpara University of Agriculture, Umudike (MOUAU). A trail pit was dug taking disturbed soil samples at a depth of 1m, 2m, and 3m for experimental analysis. Laboratory tests on specific gravity, grain size distribution, moisture content, atterberg limits, and triaxial tests were carried out on each sample by the procedure highlighted in BS1377 1990. Inspecting visually, the …

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Assessment Of The Environmental And Health Risks Of Chromium In The Soil Of Tanning Factories (Baghdad City - Iraq), Rawnaq Mahdi Mar 2026

Assessment Of The Environmental And Health Risks Of Chromium In The Soil Of Tanning Factories (Baghdad City - Iraq), Rawnaq Mahdi

Engineering and Technology Journal

The present study assesses the pollution level and health risk of heavy metal (Cr) in the area surrounding the tanning factories’ soil in Baghdad city-Iraq. Chromium concentration, mean, and median values were calculated. The geoaccumulation index (Igeo), the enrichment factor (EF), and the integrated pollution index (IPI) have been used in the assessment of pollution. The lowest value of (Igeo) at the surface to the north of the factory was (2.36), and the highest value of (Igeo) at a depth of 100 cm from the surface to the south of the factory was (94.94). All values of (EF) were greater …

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Prediction Of Fresh And Hardened Properties Of Concrete Containing Nanostructured Cassava Peel Ash Using Ibearugbulem's Approach, Chidobere Nwa-David, David Onwuka, Fidelis Njoku, Owus Ibearugbulem Mar 2026

Prediction Of Fresh And Hardened Properties Of Concrete Containing Nanostructured Cassava Peel Ash Using Ibearugbulem's Approach, Chidobere Nwa-David, David Onwuka, Fidelis Njoku, Owus Ibearugbulem

Engineering and Technology Journal

Statistical methods such as Scheffe’s and Osadebe’s models are commonly employed for the optimization of concrete properties. Despite their prediction suitability, attention is drawn to their drawback. Ibearugbulem’s model has been developed to address these shortcomings. In this study, Ibearugbulem’s optimization method was employed to formulate a mathematical model for prediction and strength-optimization of nanostructured cassava peel ash (NCPA)-cement composite. The variation of 28 days compressive strength and initial and final setting time of NCPA-concrete was evaluated. Based on the establishment of a spatial domain for each concrete mixture variable, the response function is expressed as a multivariable function for …

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Soil-Foundation Interaction And Its Influences On Some Geotechnical Properties Of Sulaimaniyah, Northern Iraq Fine-Grained Soils Utilizing Plaxis 3d, Nihad Salih, Tavga Abdalla, Fadhl Ahmed Mar 2026

Soil-Foundation Interaction And Its Influences On Some Geotechnical Properties Of Sulaimaniyah, Northern Iraq Fine-Grained Soils Utilizing Plaxis 3d, Nihad Salih, Tavga Abdalla, Fadhl Ahmed

Engineering and Technology Journal

Foundations of various construction projects usually can be either shallow or deep foundations. A mat foundation is one of the common shallow foundations typically utilized for various types of buildings. Foundations construct on various types of soils, which might be essential to understand the interaction scenario between them as they are two different types of materials. This study aims to discover the characteristics of the soil-foundation interaction for the suitable areas for the resettlement process in focus on a certain foundation type with a dimension of 10m x 10m x 0.5m, applied on twelve areas rich with fine-grained soil types …

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Effect Of Adding Recycled Sand And Fines Retained From Eggshell Waste On The Mechanical Properties And Durability Of Scc And Sfscc, Chaib. S, Bensalem. R Mar 2026

Effect Of Adding Recycled Sand And Fines Retained From Eggshell Waste On The Mechanical Properties And Durability Of Scc And Sfscc, Chaib. S, Bensalem. R

Engineering and Technology Journal

This scientific research was carried out within the framework of contributing to the recovery different of natures of waste, and making it possible to minimize using of natural aggregates in the field of construction, in order to place an eco-self-consolidating concrete (eco-SCC). Crushed demolition waste mainly of concrete had been studied as a substitute for natural sand. As well as the effect of replacing fines with crushed eggshell waste was assessed. So this present work fits in these contexts. Therefore the main objective of this study is to improve current knowledge on the behavior of studied concretes in the fresh …

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Flexural Performance Of Concrete Beams Reinforced With Hybrid Frp-Steel Bars: A Mini Review, Marwah Abduljabbar, Wael Abdulsahib Mar 2026

Flexural Performance Of Concrete Beams Reinforced With Hybrid Frp-Steel Bars: A Mini Review, Marwah Abduljabbar, Wael Abdulsahib

Engineering and Technology Journal

Reinforced concrete beams are the most generally used structural parts in building, bridges, and many other structures. In the past two decades, many investigations have been conducted using various fiber-reinforced polymer (FRP) material types /steel bars to reinforce concrete beams under flexural test. The purpose of this paper is to review the flexural performance of concrete beams reinforced with hybrid FRP and steel bars to better understand their behavior. The main parameters addressed by researchers were dimensions of beams, FRP bar material type, and hybrid reinforcement ratio. The researchers established that the use of the combination between steel and FRP …

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Stress Analysis Of Transversely Loaded Isotropic Three-Dimensional Plates Using A Polynomial Shear Deformation Theory, Festus Onyeka, B. Mama, Chidobere Nwa-David Mar 2026

Stress Analysis Of Transversely Loaded Isotropic Three-Dimensional Plates Using A Polynomial Shear Deformation Theory, Festus Onyeka, B. Mama, Chidobere Nwa-David

Engineering and Technology Journal

An exact solution for the bending attributes of a thick rectangular plate under transverse loading is modeled herein using three-dimensional (3-D) elasticity plate theory and fourth-order polynomial shear deformation function. Precluding coefficients of shear correction, this model captured the effect of shear deformation along with the transverse normal strain stress. The expression for total potential energy was derived from a 3-D kinematic and constitutive relation the equilibrium equation was developed and employed from the energy functional transformation to get the relationship between slope and deflection. Exact polynomial functions were obtained from the outcome of the equilibrium equation and with the …

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A Sight Of View On Hydrothermal Synthesis Of Copper Oxide, Roaa Abaas, Evan Salim, Rana Mahdi Mar 2026

A Sight Of View On Hydrothermal Synthesis Of Copper Oxide, Roaa Abaas, Evan Salim, Rana Mahdi

Engineering and Technology Journal

In this study, attention was directed to the preparation of nano-copper oxide films and their multiple applications, where a group of recent researches were presented and compared to reach the optimal phase, then the optimal application, and finally the optimal values in the optimal application. Where the metal-oxides are significant technology used in device fabrication in electronic and chemical industries, due to their applications in advanced technologies, which have been attached to the synthesis of copper oxide nanoparticles. These materials present different properties depending on molecular structure. Copper oxide is used in a wide range of applications. The copper oxide …

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A Comparison Of Results Among Waste Management Producers: A Case Study For The Process Of Waste Management, Huda Hadi, Jabbar Abbas Mar 2026

A Comparison Of Results Among Waste Management Producers: A Case Study For The Process Of Waste Management, Huda Hadi, Jabbar Abbas

Engineering and Technology Journal

In this paper, we apply a mathematical model based on cooperative game theory to model cooperation among producers in waste management. Then, we use the Shapely value as a solution concept in a cooperative game to evaluate the cooperation existing among producers, in order to show the potential cost to the waste producers in the case of cooperation and reduce the overall costs of processing non-recyclable waste during the cooperation. Thus, this study concludes that all producers divide sanitary landfills or incineration of non-recyclable waste, meaning that for each producer who earns more, there will be a greater contribution to …

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E-Voting System Based On Ethereum Blockchain Technology Using Ganache And Remix Environments, Hind Hassan, Rehab Hassan, Ekhlas Gbashi Mar 2026

E-Voting System Based On Ethereum Blockchain Technology Using Ganache And Remix Environments, Hind Hassan, Rehab Hassan, Ekhlas Gbashi

Engineering and Technology Journal

Abstract—In the second decade of the twenty-first century, blockchain is considered one of the most popular computer technologies. Blockchain is a zero-trust network, making it a potent tool for various services provided that people are ready to believe and invest in it. In the Ethereum world, the blockchain runs on smart contracts, self-executing applications that come at the cost of security. As technology is used increasingly, Election is facing new issues of trust and management. Therefore, E-voting systems are increasingly acceptable because they are more accurate, reliable, practical,6 and secure. This research purpose is to propose a decentralized elections application …

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Analysis And Simulation The Effect Of The Pierce Parameter On The Output Of The Free Electron Laser System, Thair Al-Aish, Hanady Kamil Mar 2026

Analysis And Simulation The Effect Of The Pierce Parameter On The Output Of The Free Electron Laser System, Thair Al-Aish, Hanady Kamil

Engineering and Technology Journal

The free electron laser is considered one of these important and advanced inventions because it provides a laser beam within various wavelengths of the electromagnetic spectrum. In any laser system device, several parameters must be available on which the efficiency and performance of the laser system are dependent. The Pierce parameter is one of the important parameters in measuring the performance quality of the free electron laser. In this paper, the simulation results were obtained using the MATLAB program to show the important effect of the Pierce parameter on the performance of the free electron laser system. The simulation results …

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Effect Of Subcritical Treatment (Tempering) On Hardness And Wear Of High Chromium White Cast Iron, Sahraoui Aissat, Ali Safa Mar 2026

Effect Of Subcritical Treatment (Tempering) On Hardness And Wear Of High Chromium White Cast Iron, Sahraoui Aissat, Ali Safa

Engineering and Technology Journal

High chromium white cast iron (HCWCI) is used in mining, crushing plants, as mill liners, and in the manufacture of grinding balls. The grinding ball is the essential element in fine fragmentation. It must have an excellent life to counter extreme wear and impact conditions that it undergoes. Hence it is important to improve its mechanical properties. This study aims to find the effect of tempering temperature on microstructure, hardness, and abrasive wear of High Chromium White Cast Iron used in the manufacture of grinding balls. In this study, the balls in high chromium white cast iron with 12 to …

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Fabrication Of Silver Nanoparticles In Aqueous Solution By Laser Technique And Study Of Their Hemocompatibility And Antibacterial Effects Against Dental Decay Bacteria, Ruaa Abbas, Azhar Haleem, Abdulhadi Judran Mar 2026

Fabrication Of Silver Nanoparticles In Aqueous Solution By Laser Technique And Study Of Their Hemocompatibility And Antibacterial Effects Against Dental Decay Bacteria, Ruaa Abbas, Azhar Haleem, Abdulhadi Judran

Engineering and Technology Journal

Silver nanoparticles (Ag NPs) were prepared by laser ablation of a silver bulk immersed in cetrimonium bromide (CTAB). The immersed sheet was focused by a pulsed Nd:YAG laser at 1064 nm, 600 mJ at room temperature, a pulse duration of 10 ns, and a repetition rate of 5 Hz. The Ag NPs suspension was analyzed using UV–Vis spectroscopy, zeta potential (ZP), the Fourier transform infrared (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). The peak at 425 nm was observed in the absorption spectrum of Ag NPs colloidal solution.Ag NPs' colloidal results are …

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The Photo-Oxidation Of Co From Ambient Air Using Catalytic Asphaltic Pavement, Seba Mohammed, Zainab Shnain, Mohammad Abid, Asawer Alwasiti, Kadhim Abed, Mohammed Mohammed, Zainab Hameed, Sajda Faris, Peter Philib Mar 2026

The Photo-Oxidation Of Co From Ambient Air Using Catalytic Asphaltic Pavement, Seba Mohammed, Zainab Shnain, Mohammad Abid, Asawer Alwasiti, Kadhim Abed, Mohammed Mohammed, Zainab Hameed, Sajda Faris, Peter Philib

Engineering and Technology Journal

Road transportation in urban areas may be considered a major source of environmental pollution. The purpose of this study is to determine the effectiveness of the oxidation of carbon dioxide gas emitted by an internal combustion engine. This is achieved using an asphaltic pavement coated with Cu/TiO2 nanoparticles by spraying and irradiating with white light under ambient conditions to reduce the air pollution problem (carbon monoxide) caused by vehicles. Using electron microscopy, energy dispersive spectroscopy, and Fourier transform infrared spectroscopy, we determined the physicochemical and morphological characteristics of the photocatalyst. Following the characterization study, the photo-catalytic activity of the asphalt …

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A Review On The Separation Of Volatile Organic Compounds From Wastewater By Pervaporation Processes, Salam Hussein, Salah Ibrahim, Adel Zrelli, Alberto Figoli, Adnan Alhathal Alanezi, Qusay Alsalhy Mar 2026

A Review On The Separation Of Volatile Organic Compounds From Wastewater By Pervaporation Processes, Salam Hussein, Salah Ibrahim, Adel Zrelli, Alberto Figoli, Adnan Alhathal Alanezi, Qusay Alsalhy

Engineering and Technology Journal

The pervaporation process (PV) is one of the membrane separation methods. This process is characterized by low cost, ease of installation, no chemicals added, and work at medium temperatures. The pervaporation process is part of a chain of water treatment processes and has high efficiency in removing pollutants, drying processes, and others. The present review paper would be reviewed the related articles to show the efficiency of the separation of the solution by the pervaporation process by focusing on research that deals with the separation of volatile organic compounds (VOCs) from water such as benzene and toluene. Benzene compound was …

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Clathrate-Based Recovery Of Sulfuric Acid From Spent A Cid, Najlaa Lazim, Riyadh Almukhtar Mar 2026

Clathrate-Based Recovery Of Sulfuric Acid From Spent A Cid, Najlaa Lazim, Riyadh Almukhtar

Engineering and Technology Journal

Recently, the applications of hydrate phenomena in industrial processes have been increasing. A clathrate or hydrate is a solid, ice-like compound that forms when water/guest is mixed under certain conditions. Hydrogen water molecules bond with the guest molecules to form a crystal lattice. Different guests can form the Clathrate (e.g., gases or liquids). Dilute Sulfuric acid is usually generated at different industrial plants, and these dilute acids are considered waste because they cannot be reused again. Many treatment processes handle this environmental problem, like electrochemistry, precipitation, adsorption, membrane filtration, and ion exchange. Although such processes have significant operational advantages, their …

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Applications Of Helical Versus Straight Hollow Fiber Membranes: A Review, Adel Zrelli, Jamila Debaya, Abdoulaye Doucoure, Bechir Chaouachi Mar 2026

Applications Of Helical Versus Straight Hollow Fiber Membranes: A Review, Adel Zrelli, Jamila Debaya, Abdoulaye Doucoure, Bechir Chaouachi

Engineering and Technology Journal

The production of straight and helical hollow fibers plays an important role in developing hollow fiber membrane technology that encompasses a broad range of designs. During the last two decades, scientific studies devoted to straight hollow fibers were more abundant than those focused on helical fibers. Several major applications considering side-by-side testing of these two geometries are discussed in this review. For membrane extraction, desalination, and membrane contactor processes, it is observed that permeability rates are 10%-400 % higher for helical fibers compared to straight fibers. This outcome is justified by the presence of Dean-vortices-induced flow turbulences inherent to the …

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Optimization Of Curing Process For Production Of Jatropha Oil Bio-Based Resin Decorated With Nano-Al2o3 And Mechanical Characterization, Agita Setiawan, Zurina Abidin, Farah Ezzah Ab Latif, Khalina Abdan Mar 2026

Optimization Of Curing Process For Production Of Jatropha Oil Bio-Based Resin Decorated With Nano-Al2o3 And Mechanical Characterization, Agita Setiawan, Zurina Abidin, Farah Ezzah Ab Latif, Khalina Abdan

Engineering and Technology Journal

Concerns on the environment, health and safety issues posed by synthetic resins has amplified numerous efforts of producing resin from various renewable sources. The use of plant oil as potential source of resin has attracted interest from various researchers. Jatropha Oil is a competitive source to petroleum counterparts due to its availability, biodegradability, low eco-toxicity but exhibit poor mechanical properties among many. The objective of this study is to study the effect of adding nanoparticles as reinforcing fillers to bio-based resin from Epoxidized crude Jatropha Oil (ECJO) to improve its mechanical performance. Various loadings of 0% to 4% of Al2O3 …

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A Survey On Microstrip Single/Multiband Bandpass Filter For 5g Applications, Halah I. Khani, Ahmed S. Ezzulddin Mar 2026

A Survey On Microstrip Single/Multiband Bandpass Filter For 5g Applications, Halah I. Khani, Ahmed S. Ezzulddin

Engineering and Technology Journal

For a long time, extensive research on microstrip bandpass filters has been documented to meet the standards of modern multiservice wireless communication systems. The multiband bandpass filters (BPF) are required for the receiver front end to function as a single device that caters to many bands at the same time. Planar bandpass filters are particularly promising because of their simplicity of manufacture using printed circuit technology, compactness, and low integration cost. Due to the need for high integration, low cost, and high-speed data transmission, the design and implementation of filters for fifth-generation (5G) mobile communication systems is difficult. This paper …

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Artificial Neural Network-Based Transmission Power Control For Underwater Wireless Optical Communication System, Omar Mohammed Salim, Salah Adnan, Ammar Mutlag Mar 2026

Artificial Neural Network-Based Transmission Power Control For Underwater Wireless Optical Communication System, Omar Mohammed Salim, Salah Adnan, Ammar Mutlag

Engineering and Technology Journal

Several scientists have proposed using an underwater wireless optical communication system (UWOC) to deliver high-speed data services using the abundant optical spectrum. However, wireless optical signal propagation faces an antagonistic environment when using undersea channels due to various factors like scattering, absorption, turbulence, and optical link misalignment between the transmitter and the receiver. These factors will attenuate the optical signal and lead to degrading system performance. To reduce these factors impact on the communication system's performance, transmitted optical power (OTP) should be increased. Since the UWOC system is battery-powered, increasing OTP will consume more electrical power. Therefore, it is necessary …

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Design Of Optimal Pid Controller For Electric Vehicle Based On Particle Swarm And Multi-Verse Optimization Algorithms, Arkan Jassim, Ekhlas Karam, Mohammed E. Ali Mar 2026

Design Of Optimal Pid Controller For Electric Vehicle Based On Particle Swarm And Multi-Verse Optimization Algorithms, Arkan Jassim, Ekhlas Karam, Mohammed E. Ali

Engineering and Technology Journal

The automotive industry is moving toward more environmentally friendly automobiles with greater range and performance than traditional vehicles as the effects of global warming worsen. Because of the positive impact, electric vehicles can have on reducing harmful emissions from the transportation sector, scientists have grown increasingly interested in the possibility of analyzing and simulating electric vehicles. In this study, we develop a non-linear dynamic concept of an electric vehicle by fusing kinetic and electrical components. Then we create a proportional Integral derivative (PID) controller to help it stay on course. To obtain optimal parameters for this controller by minimizing the …

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Sdr-Based Intelligent Cooperative Spectrum Sensing For Cognitive Radio Systems, Ali Radhi, Hanan Akkar, Hikmat Abdullah Mar 2026

Sdr-Based Intelligent Cooperative Spectrum Sensing For Cognitive Radio Systems, Ali Radhi, Hanan Akkar, Hikmat Abdullah

Engineering and Technology Journal

In this paper, the software and hardware of a software-defined radio (SDR) platform are used to implement and verify the blind real-time sensing act of intelligent collaborative spectrum sensing based on a new theoretical formula for constructing denoised mixed features named MSKU3 and paired with an unsupervised machine learning K-Medoids algorithm. Two low-cost RTL-SDR dongle hardware receivers are used as two cooperative unlicensed secondary users to capture the radio frequency of a licensed primary user channel. A host personal computer is used as a fusion center to run GNU-Radio software signal processing blocks to implement the developed method, and a …

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An Unbalance Three Phase Currents Detection Technique For Load Side Broken Conductor Fault In The Iraqi Distribution System, Ali Al-Baghdadi, Mohammed Abd, Firas Flaih Mar 2026

An Unbalance Three Phase Currents Detection Technique For Load Side Broken Conductor Fault In The Iraqi Distribution System, Ali Al-Baghdadi, Mohammed Abd, Firas Flaih

Engineering and Technology Journal

Electrical supply safety and quality represent targets that Iraqi power distribution companies always strive to meet. Load-side broken conductor fault LSBC is one of the greatest faults affecting both targets. Stand out since the magnitudes of the impact on the system are too small to activate the relevant system protection devices in Iraqi substation 33/11kV. Therefore, protection from LSBC faults has been one of the biggest challenges in the Iraqi electrical distribution system. In this context, the main aim of this article is to present a method for detecting LSBC faults by unbalanced three-phase currents faults measured in a 33/11kv …

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Antenna Gain-Bandwidth Enhancements Using Crlh Hilbert Fractal-Based Structure, Marwa Ismail, Taha Elwi, A. Salim Mar 2026

Antenna Gain-Bandwidth Enhancements Using Crlh Hilbert Fractal-Based Structure, Marwa Ismail, Taha Elwi, A. Salim

Engineering and Technology Journal

With the development of communication systems, antennas of small size and high gain have become essential to keep up with the new challenges. The metamaterials made these challenges possible. In this paper, a new low-profile metamaterials-based array is designed. The array unit cell comprises a symmetric composite right left hand (CRLH) unit cell. A third-order Hilbert curve structure replaces the VIA, and aperiodic slots are introduced between the unit cells to enhance the overall performance. This design provides a significant improvement over the original design. CST MWS was used to stimulate the design. Gain and S11 are calculated to evaluate …

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Design And Implement The Innovative Drugstore For Health Care Services Based On Health Mobile Applications And Advanced Iot, Yusur Al - Saffar, Sabah Gitaffa, Abbas H. Issa Mar 2026

Design And Implement The Innovative Drugstore For Health Care Services Based On Health Mobile Applications And Advanced Iot, Yusur Al - Saffar, Sabah Gitaffa, Abbas H. Issa

Engineering and Technology Journal

The health care problems are errors in taking medication, improper storage of the medication, irregularly taking the medication on time, and not knowing the side effects of taking medication with different foods. This work aims to find an integrated system that works on informing people of the medicine they take, the exact dose of the medicine at all times, keeping the medicine from spoiling, alerting the patient to the side effects of the medicine, and creating tables for taking the history of taking medicines. This assists doctors when going to the hospital in emergency cases. The innovative drugstore is built …

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Improved Design For The High Gain Wideband Matrix Amplifiers Using Differential Cells And Microwave Cmos Technology, Saeed Ridha, Azad Kareem, Ashwaq Hameed Mar 2026

Improved Design For The High Gain Wideband Matrix Amplifiers Using Differential Cells And Microwave Cmos Technology, Saeed Ridha, Azad Kareem, Ashwaq Hameed

Engineering and Technology Journal

The Matrix Amplifier is a structure designed to increase the gain of the wideband distributed amplifiers. A matrix amplifier is used to improve the pass-band gain while preserving the dispersed design-wide characteristics to use the multiplicative gain mechanism. In this paper, the matrix distributed amplifier methodology is developed using differential cells instead of active amplifier cells to improve the wideband characteristics. Shunt capacitances are connected in the centerline to absorb the peaking impact at a cut-off frequency and reduce gain ripples. As an application of the ideas and concepts of matrix amplifiers, a modified step-by-step design of rows 4 and …

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