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Simulation Of Mosul Dam Reservoir Operation For Irrigation And Hydropower Generation, Baraa Jebbo, Taymoor Awchi Aug 2026

Simulation Of Mosul Dam Reservoir Operation For Irrigation And Hydropower Generation, Baraa Jebbo, Taymoor Awchi

Engineering and Technology Journal

The current research aims to build a simulation model to study the effect of Jazeera irrigation projects (North, East and South) water requirements on hydroelectric power generation from Mosul dam hydropower plant. The simulation was applied from January 1988 to December 2006 on a monthly basis. A simulation model was built utilizing (HEC-ResSim 3.0) Package, which showed high efficiency in representing and simulating the actual operation of the reservoir. Simulation model operation has been carried out through five scenarios with two cases of priority; the first was to maximize the hydroelectric power generation, and the second was to minimize the …

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Restoring The Local Heritage And Its Role In Sustainable Spatial Development The Great Market In Al-Najaf – A Case Study, Wahda Al-Hinkawi, Baneen Al-Saadawi Aug 2026

Restoring The Local Heritage And Its Role In Sustainable Spatial Development The Great Market In Al-Najaf – A Case Study, Wahda Al-Hinkawi, Baneen Al-Saadawi

Engineering and Technology Journal

Regional and local changes in Iraq have led to an accelerated dynamic of comprehensive development without the preservation of local heritage, which caused the loss of many traditional buildings, changing their urban fabric, the emergence of contradictory architectural styles, and others without a clear and specific identity, causing visual deformation. The research problem was identified from the goals and principles of urban design that concerned with the conservation, restoration, and continuity of heritage context, activates their role in sustainable development programs and as a response to changes and radical shifts in spatial structures of city centers, and the social and …

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Thermodynamic And Kinetic Investigation Of Desalination By Refrigerant Clathrate Hydrate Formation, Shurooq Al-Hemeri, Riyadh Al-Mukhtar, Lina Mahmood Aug 2026

Thermodynamic And Kinetic Investigation Of Desalination By Refrigerant Clathrate Hydrate Formation, Shurooq Al-Hemeri, Riyadh Al-Mukhtar, Lina Mahmood

Engineering and Technology Journal

Gas hydrate is a crystalline solid compound form of water with hydrophobic gas at certain conditions (pressure and temperature). The hydrogen bond in water molecules constructs a framework as a host that entraps gas molecules (gust). Gas hydrate can be applied to many industries such as gas separation, cool storage, food concentration and desalination. Hydrate route looks a promising alternative technology compared to the conventional process, by utilizing a proper gas host, which can be held within water cavities composed by hydrogen-bonded water molecules. In this study the selected host gas was Refrigerant R134a, the work consists of an experimental …

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Criteria For Sustainable Planting Design Applications In Landscape Architecture Projects Under Arid Conditions, Abdullah Ghazal Aug 2026

Criteria For Sustainable Planting Design Applications In Landscape Architecture Projects Under Arid Conditions, Abdullah Ghazal

Engineering and Technology Journal

Planting design is an important part of all Landscape Architecture projects (LAps). It needs new criteria in order to make it more sustainable. When arid conditions are dominant, these criteria will be more difficult. These limiting factors of harsh environment and aridity, such as high temperature and evaporation, low rainfall, poor and sandy soil, are largely diverse in many levels concerning water, soil, and climate. Thus they clearly appear in designing and impeding sustainable LAps. The planting design in LAps is governed by three major factors which are: plant species, water availability, and the control soil property and climate conditions. …

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Preparation And Study The Structure Of Pure And Impure Barium Titanate With Zr4+ Ion, Mojahid Najim, Wasan Hekmat Aug 2026

Preparation And Study The Structure Of Pure And Impure Barium Titanate With Zr4+ Ion, Mojahid Najim, Wasan Hekmat

Engineering and Technology Journal

In this research, pure and impure barium titanate with Zr4+ ion with two molar ratios x= (5, 10) % have been synthesized by solid-state reaction technique. The powders calculations at two temperatures (950°C and 1400°C). An XRD technique was used in order to study the crystal structure of pure and impure barium titanate, which confirmed the formation of the tetragonal phase of BaTiO3, then calculate the lattice parameters of pure and impure barium titanate, the addition of zirconium ion Zr4+ lead to increases lattice parameters.

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Synthesis, Characterization And Antibacterial Activities Of Uracil And Uracil–Oxalate Complexes With Cr(Iii) And Fe(Iii), Shatha Obaid Aug 2026

Synthesis, Characterization And Antibacterial Activities Of Uracil And Uracil–Oxalate Complexes With Cr(Iii) And Fe(Iii), Shatha Obaid

Engineering and Technology Journal

New complexes of the some trivalent transition metal ions of the uracil such as [M(Ura)3Cl3] and mixed ligand metal complexes with uracil and oxalic acid [M(Ura)2(OA)(OH2)Cl].H2O type, where (Ura)=Uracil, (OA= Oxalic acid dihydrate, (M= Cr+3 and Fe+3) were synthesized and characterized by the elemental analysis, FT.IR, electronic spectra, mass spectra and magnetic susceptibility as well as the conductivity measurements. Six–coordinated metal complexes were suggested for the isolated complexes of Cr+3 and Fe+3 with molecular formulas dependent on the nature of uracil and oxalic acid present. The proposed molecular structure for all complexes with their ions is octahedral geometries. The antibacterial …

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Production Of Lightweight Concrete By Using Construction Lightweight Wastes, Huda Abed Aug 2026

Production Of Lightweight Concrete By Using Construction Lightweight Wastes, Huda Abed

Engineering and Technology Journal

This research covers the use of cellular lightweight concrete waste as recycled coarse aggregates to produce lightweight concrete. Various volume fractions of coarse aggregate (35%, 50%, and 75%) were used. The specimens were tested for compressive strength and density at age of 28-days. The compressive strengths for the resulting lightweight concrete with a density of (2131, 1826 and 1630) kg/m3 were (24, 22.6 and 11.5) MPa, respectively. In addition, silica fume was utilized as a constant replacement ratio 6% of cement weight for mixes lightweight aggregate to enhance the compressive strength of such concrete.

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Some Mechanical Properties Of Polymer Matrix Composites Reinforced By Nano Silica Particles And Glass Fibers, Sudad Younis, Jawad Oleiwi, Reem Mohammed Aug 2026

Some Mechanical Properties Of Polymer Matrix Composites Reinforced By Nano Silica Particles And Glass Fibers, Sudad Younis, Jawad Oleiwi, Reem Mohammed

Engineering and Technology Journal

This research studied the effect of nano silica particles on wear behavior test , ultimate tensile strength ,impact strength, fracture toughness and hardness shore D of specimens composite material. The hand-lay-up method is used to preparation of specimens established from unsaturated polyester resin matrix reinforcement with 4% weight fraction glass fiber (chopped / woven) mat and 1%, 3%, 5% weight fraction of nano silica particle. The nano silica particles used in this study has an average size of (less than 45nm). The results showed that the specimen (up+4% woven glass fiber+5% nano SiO2) gives better mechanical properties include ultimate tensile …

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Resistance Of High-Volume Fly Ash Self-Compacting Concrete To Internal Sulfate Attack, Tareq Al-Attar, Ahmed Taha Aug 2026

Resistance Of High-Volume Fly Ash Self-Compacting Concrete To Internal Sulfate Attack, Tareq Al-Attar, Ahmed Taha

Engineering and Technology Journal

This paper investigates the durability of high-volume Fly ash self-compacting concrete, HVFASCC that exposed to internal sulfate attack. At the present work, HVFASCC was produced with two Fly ash replacements: 50 and 60% by weight of Portland cement. The internal sulfate attack was simulated by adding natural gypsum (CaSO4) that contain ion (SO3-2) to fine aggregate by two weight percentages: 1 and 2%. Limestone dust was used as filler with a content of 100 kg/m3. The cementitious materials, cement and Fly ash, content was 400 kg/m3 and the water to powder ratio for the studied mixes was 0.34 by weight. …

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Robust Multiple Model Adaptive Control For Dynamic Positioning Of Quadrotor Helicopter System, Safanah Raafat, Zainab Mahmoud Aug 2026

Robust Multiple Model Adaptive Control For Dynamic Positioning Of Quadrotor Helicopter System, Safanah Raafat, Zainab Mahmoud

Engineering and Technology Journal

The quadrotor control has been one of the benchmark control problems. It is considered as an under-actuated, multivariable and high nonlinear system due to its dynamics, having strong coupling between translation and angular motion and affected by external disturbances associated with flight environment. Therefore, there is a need to design a robust control that can keep up with sudden changes and find better tracking performance against modeling error and uncertainties. In this work, an adaptive state feedback control method denoted as Classical Multiple Model Adaptive Control (CMMAC) has been implemented. This method embodies in its structure a bank of filters. …

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Study Of The Mechanical Properties Of Jute Fiber Reinforced Cement Composites, Lamees Faiq Aug 2026

Study Of The Mechanical Properties Of Jute Fiber Reinforced Cement Composites, Lamees Faiq

Engineering and Technology Journal

The study results show the use of jute fibers to develop a low cost material for wall panels, roofs and other construction board. The study has been investigates the cement mechanical characteristics jute fibers reinforced concrete. Different lengths of fibers (2cm) and (4cm) were mixed to act as reinforcement for the concrete samples. The samples with different fiber percentages (0.5%, 1% and 1.5% by weight of cement) were tested in axial compression and splitting tensile strength. A total of (42) concrete cube samples (100mm*100mm*100mm) and (42) cylindrical samples (100mm*200mm) were used in the tests, these include compressive and splitting tensile …

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Mechanical Properties Modeling And Optimization For Polymeric Matrix Hybrid Bio Composite For Scaffolds Application, Jenan Kashan, Marwan Arbilei Aug 2026

Mechanical Properties Modeling And Optimization For Polymeric Matrix Hybrid Bio Composite For Scaffolds Application, Jenan Kashan, Marwan Arbilei

Engineering and Technology Journal

TiO2 / Polypropylene composite considers very promising biomaterials in bone replacement and repair application, but mechanical properties still out of load bearing scaffolds application. In this work, two approaches were suggested to produce enhanced polymeric matrix bio composite for scaffolds application, 1st one was by using Nano TiO2 particles to produce bio composite with good mechanical properties. while the 2nd approach applied by the addition of Al2O3 Nano particles. Different processing conditions have been used like different compounding pressures, compounding temperatures, and chemical composition. This work aimed to investigate the effect of these additions and processing factors on mechanical and …

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Effect Of Inhibition By Honey On Corrosion Behavior Of Composite Materials From Al-4% Si Alloy Reinforced With Y2o3 Particles, Hanna Al-Kaisy, Mervit Hanoos Aug 2026

Effect Of Inhibition By Honey On Corrosion Behavior Of Composite Materials From Al-4% Si Alloy Reinforced With Y2o3 Particles, Hanna Al-Kaisy, Mervit Hanoos

Engineering and Technology Journal

this work focuses on the preparation specimens of metal matrix composite materials exemplified alloy (Al-4%Si) reinforced by yttria particles Y2O3 with different weight percentage (1,2and 3). Effect of yttria particles on polarization behavior of (Al-4% Si alloy) in sulfuric acid (0.5 M) was studied by using potentiostat in the presence and the absence of natural honey with different concentration (1and 2gm/L) as inhibitor. The results show that the values of tafel slops and corrosion rate (Rmpy) of composite materials reinforcing with particles of yttria with three percentage decreases with increasing the concentration of honey, and the efficiency of inhibition (El%) …

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The Effect Of Addition Of Ceo2 Nanoparticles On The Microstructure And Mechanical Properties Of Ti-Al-Mg Compact Samples, Mahdi Hanoon, Akeel Al-Attar, Ali Resen Aug 2026

The Effect Of Addition Of Ceo2 Nanoparticles On The Microstructure And Mechanical Properties Of Ti-Al-Mg Compact Samples, Mahdi Hanoon, Akeel Al-Attar, Ali Resen

Engineering and Technology Journal

In this research, Ti-15Al-5Mg alloy with different amount of CeO2 nanoparticles was prepared by powder metallurgy method, the powders of these materials were mixed together by ball mill then the mixed powders were pressed under high pressure, the compacted samples were sintered in electron furnace under argon gas. The density and porosity measured using Archimedes method, XRD and SEM images were used to detect phase's peaks and microstructure of all alloy sets. Vickers micro-hardness measured and Brazilian compressive tests, the results of these tests were drawing in charts with porosity and CeO2 nanoparticles percentage. From these results the best amount …

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Corrosion Activity Laser Treated Aluminum-12% Silicon Alloy With Fe And Ti Powders At Two Different Energies, Mervit Hanoos Aug 2026

Corrosion Activity Laser Treated Aluminum-12% Silicon Alloy With Fe And Ti Powders At Two Different Energies, Mervit Hanoos

Engineering and Technology Journal

In This work, the corrosion activity of laser treated almium-12%silicon alloy was tested. The addition of Fe and Ti as elemental powders was studied. Two different laser energies of 750 and 1000 kJ were used. Corrosion measurements by potential static at 3mV.sec-1in condensed synthetic automotive solution. The corrosion data show that laser treatment led to increasing corrosion resistance due to smoothness of the surface alloy because of high energy, and the corrosion resistance in the presence of Fe and Ti powders better than that in the absence of metallic powders were increased from (8.416 Ω.cm2( to )11.216 Ω.cm2( whereas corrosion …

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Physical Properties Study On Ti-C/Nano-Ceramics Composite, Ahmed Al-Ghaban, Niveen Abdulkader, Hadeel Al Baiaty Aug 2026

Physical Properties Study On Ti-C/Nano-Ceramics Composite, Ahmed Al-Ghaban, Niveen Abdulkader, Hadeel Al Baiaty

Engineering and Technology Journal

The effect of introducing Al2O3 and CuO nano particles on the physical properties of sintered Ti-C based materials has been studied. Titanium and carbon elemental powders have been mixed with nanoparticles of Al2O3 and CuO to produce composites of Ti-C/ceramics at 1100 °C. The XRD results show that for different amount of mixed nanoparticles, TiC, TiO2, and some rest of the reacted powders are the most dominant stable phases. In terms of physical properties, the results show that the raised Al2O3 percentage leads to gradually increase in apparent density of the sintered mixture as compared with the purely prepared TiC. …

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Effect Of V-Shape Twisted Jaw Turbulators On Thermal Performance Of Tube Heat Exchanger: An Experimental Study, Akram Abed, Nassr Hussein, Abdulmunem Abdulmunem Aug 2026

Effect Of V-Shape Twisted Jaw Turbulators On Thermal Performance Of Tube Heat Exchanger: An Experimental Study, Akram Abed, Nassr Hussein, Abdulmunem Abdulmunem

Engineering and Technology Journal

The main purpose of the present investigation is enhancing heat transfer rate in a tube heat exchanger by using V-shape twisted Jaws. The air is used as a working fluid and pumped through the test section with different values of Reynolds number (6000 - 19500), while the heat flux has been selected as a constant boundary condition around the tube section. In this study, two type of twisted jaw turbulators are used with two twisted ratio (TR= 2 & 4) as well as, the effect of using different numbers of turbulators (N= 6, 8 and 10) inside test section with …

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Geomatics Techniques To Evaluate Bus Service Coverage A Case Study On Nasiriyah, Iraq, Murtadha Satchet Aug 2026

Geomatics Techniques To Evaluate Bus Service Coverage A Case Study On Nasiriyah, Iraq, Murtadha Satchet

Engineering and Technology Journal

In this paper, geomatics techniques were used to collect, build, and analyze a geo-database of the bus transport network. Spatial identification of bus routes and bus stops using GPS was performed using GIS to link and analyze the necessary metadata with the available spatial data. The criteria used to assess bus service coverage were as follows: the spatial coverage in terms of the walking distance to the transport service, the adequacy of the transport network length, and extent of supply availability of the bus transport system. The results revealed that the population “living in 47% of the city’s urban area” …

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Difference And Contradiction Of Critique Methods To Produce Styles Of Modulation In Architecture: (Architect Peter Eisenman As Example), Basim Al-Majidi, Baneen Al-Saadawi Aug 2026

Difference And Contradiction Of Critique Methods To Produce Styles Of Modulation In Architecture: (Architect Peter Eisenman As Example), Basim Al-Majidi, Baneen Al-Saadawi

Engineering and Technology Journal

Rapid changes and developments have brought contemporary intellectual theories and different and diverse ties to highlight the different and multiple concepts contribute to the definition of any philosophy and intellect, which are frequent and mutant methods and demonstrations of the same values and origins which in turn describe the state of existence, continuity, permanence and human communication, the most important concepts are Difference and contradiction as the basis of everything, and without them there is no existence or knowledge. most contemporary studies focused on the different critical methods linked to the semantics and meanings that express architecture on the one …

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Optimization Of Heat Treatment Parameters For The Tensile Properties Of Medium Carbon Steel, Abbas Hussein, Laith Abbas, Wisam Hasan Aug 2026

Optimization Of Heat Treatment Parameters For The Tensile Properties Of Medium Carbon Steel, Abbas Hussein, Laith Abbas, Wisam Hasan

Engineering and Technology Journal

The purpose of this study is designate quenching and tempering heat treatment by using Taguchi technique to determination optimal factors of heat treatment (tempering temperature, percentage of nanoparticles, type of base media, nanoparticles type and tempering time)for increasing ultimate tensile strength, yield strength and ductility properties of medium carbon steel. An (L18) orthogonal array was chosen for the design of experiment. The optimum process parameters were determined by using signal-to-noise ratio (larger is better) criterion. The importance levels of process parameters on tensile properties were obtained by using analysis of variance, which applied with the help of (Minitab18) software. Percentage …

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Synthesis Of Multi-Walled Carbon Nanotubes Decorated With Zinc Oxide Nanoparticles For Removal Of Pathogenic Bacterial, Adawiya Haider, Riyad Al- Anbari, Hayder Mohammed, Duha Ahmed Ahmed Aug 2026

Synthesis Of Multi-Walled Carbon Nanotubes Decorated With Zinc Oxide Nanoparticles For Removal Of Pathogenic Bacterial, Adawiya Haider, Riyad Al- Anbari, Hayder Mohammed, Duha Ahmed Ahmed

Engineering and Technology Journal

A series of Zinc Oxide Nanoparticles (ZnONPs)-functionalized Multi-Walled Carbon Nanotubes (F-MWCNTs) Nano composites were developed as antibacterial. In this study, chemical oxidation of pristine MWCNTs were carried out with a mixture of strong acids (3H2SO4 98%:1 HNO3 65%).The F-MWCNTs were used as templates to prepare hybrid material like ZnONPs decorated F-MWCNTs. Pristine MWCNTs, F-MWCNTs and (ZnONPs/F-MWCNTs) Nano composites powder were investigated using Fourier Transform Infrared spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Anti-bacterial activity has been carried out using standard agar dilution (plate count) method against Escherichia coli (E. coli). This study demonstrated that (ZnONPs/F-MWCNTs) Nano composite has a powerful …

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Preparation And Characterization Of Tio2 Nanoparticles And Its Applications As Antibacterial Agents, Ghadah Kahdim, Riyad Al-Anbari, Adawiay Haider Aug 2026

Preparation And Characterization Of Tio2 Nanoparticles And Its Applications As Antibacterial Agents, Ghadah Kahdim, Riyad Al-Anbari, Adawiay Haider

Engineering and Technology Journal

TiO2NP’s were synthesis by sol-gel method at different calcination temperatures. The prepared TiO2NP’s were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and UV-Vis spectrophotometer. The antimicrobial activities of the prepared TiO2NP’s were investigative for two kinds of bacteria, (Gram-negative and Gram-positive bacterium. XRD results shows that the type of the TiO2 structure was anatase (A) at low temperatures, rutile (R) with rise of calcination temperature (Tc) into 800 ᵒC and mixed phases .SEM demonstrated that the size of nanoparticles seems larger and the accumulations appears clearly with raise calcinations temperature. The optical properties measured by the UV-Vis. Spectroscopy …

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Effect Of Natural Fibers On Mechanical Properties Of Polymer Composites, Ruaa Abdulraheem Aug 2026

Effect Of Natural Fibers On Mechanical Properties Of Polymer Composites, Ruaa Abdulraheem

Engineering and Technology Journal

The mechanical behavior of coconut shell (CS) particulate epoxy composites was concentrated on keeping in mind the end goal to create designing materials for modern application. Minute of the support with various weight portions (5, 10, 15, 20 and 25) wt%. Epoxy and composite materials were prepared by hand lay-up molding. The physical properties are thermal conductivity while the mechanical properties were hardness, tensile properties, impact properties, and flexural strength. The resulting composites of thermal conductivity 0.1005 W∕ m.c° that is lower than pure epoxy and commonplace materials utilized for home-structures. As for the mechanical properties, composite materials with (Epoxy+25%CS) …

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Study The Effect Of Micro Caco3 And Sio2 And Their Mixture On Properties Of High Strength Concrete, Ahmed Al Ghaban, Aseel Al Zubaidi, Zahraa Jawad Aug 2026

Study The Effect Of Micro Caco3 And Sio2 And Their Mixture On Properties Of High Strength Concrete, Ahmed Al Ghaban, Aseel Al Zubaidi, Zahraa Jawad

Engineering and Technology Journal

This paper investigated the effect of incorporating two types of micro particles micro CaCO3 and micro SiO2 on mechanical properties and durability of concrete. Micro materials were added in four different dosages of 1%, 2%, 3% and 4% by weight as partial replacement of cement in concrete mixture. Mechanical properties of hardened concrete (compressive strength, flexural strength and split tensile strength) have been done after 28 days of water curing. In addition, water absorption test was carrying out for obtaining the durability properties of concrete specimen. Binary combination of micro CaCO3 + micro SiO2 were also studied the combined effect …

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Studies On Characterization Of Sawdust For Application In A Gasification Process For Syngas Production, Abdul Hameed Al-Obaidy, Riyad Al-Anbari, Hussein Kadhim Aug 2026

Studies On Characterization Of Sawdust For Application In A Gasification Process For Syngas Production, Abdul Hameed Al-Obaidy, Riyad Al-Anbari, Hussein Kadhim

Engineering and Technology Journal

Quintessential characteristics of sawdust were investigated in this study as well as to to investigate the ability of reed as a Production of gases via gasification technique by using special gasifier made for this purpose. The physical properties of solid waste results showed that sawdust were suitable for using in production of syngas due to its high volatile matter and cellulose content and low moisture content. The CHNS analysis results showed that high content of hydrogen for sawdust has generated higher amount of syngas heat value, while gravimetric analysis results showed that high cellulose and hemicellulose content gave higher concentration …

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Design And Performance Analysis Of Contact Lens Materials For Chromatic And Polychromatic Aberrations Correction, Ali Al-Hamdani Aug 2026

Design And Performance Analysis Of Contact Lens Materials For Chromatic And Polychromatic Aberrations Correction, Ali Al-Hamdani

Engineering and Technology Journal

A material scientists worldwide has investigated optical plastics as alternative materials for glasses that have been widely used over the years. Plastics have numerous advantages over glasses in optical applications, especially in ophthalmic applications. Recently, researchers have developed new polymer materials to satisfy the ophthalmic industry requirements. Mechanical, chemical and physical tests were conducted to determine the polymers for contact lenses. In this study, the optical properties of polymers were evaluated and analyzed by using Zemax program depending on Liou & Brennan model. The effect of achromatic and polychromatic light on the performance of the polymers contact lenses was investigated. …

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Biosorption Technique For Naphthalene Removal From Aqueous Solution By Chara Sp., Algae, Talib Albayati, Khairi Kalash Aug 2026

Biosorption Technique For Naphthalene Removal From Aqueous Solution By Chara Sp., Algae, Talib Albayati, Khairi Kalash

Engineering and Technology Journal

These instructions give guidelines for preparing the article to be published in the Engineering& Technology Journal using MS World 7.0 or later. A short abstract should open the paper and give a clear indication of the aims, scope and the main results of the paper. The reader may decide from the abstract that the full text is of particular interest or not. The author should consider that the abstract is an indication of the scope of the topic and the obtained results and not a way of condensing the problem in a few words for quick reading. It should be …

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A Compact Dual-Band Bpf Based On Open Loop Resonator For Satellite Communication Applications, Ali Salim, Aya Alkhafaji, Mushtaq Alqaisy Aug 2026

A Compact Dual-Band Bpf Based On Open Loop Resonator For Satellite Communication Applications, Ali Salim, Aya Alkhafaji, Mushtaq Alqaisy

Engineering and Technology Journal

In this paper, a new filter is constructed by inserting two slots in the form of rectangular open loop resonator with folded ends. The insertion of these slots has successfully led to the compact size and the dual bandwidth behavior. The overall filter dimensions are 16×12 mm2, which correspond to 0.61λg × 0.4λg using a substrate with Rogers Ro 4003 with a relative permittivity of 3.38 and thickness of 1.0 mm. The resulting structure exhibits a dual-band behavior. The first passband has a center frequency of 6.2 GHz with FBW of 16.833% and input reflection coefficient better than -30 dB …

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Investigation And Analysis Of Force Production Mechanism For Partitioned Stator Flux Reversal Permanent Magnet Linear Machine, Ahlam Shuraiji, Zi Zhu Aug 2026

Investigation And Analysis Of Force Production Mechanism For Partitioned Stator Flux Reversal Permanent Magnet Linear Machine, Ahlam Shuraiji, Zi Zhu

Engineering and Technology Journal

In this paper, the force production mechanism in partitioned stator flux reversal permanent magnet (PS-FRPM) linear machine will be investigated. Since the PS-FRPM linear machine has both armature windings and the permanent magnet (PM) in one machine part and the other part is passive; thereby, the force production mechanism in conventional PM linear machine, is not valid for such a machine. In order to determine both magnetic and electrical loading frequency components, which result in production the electromagnetic force a spatial harmonic analysis is adapted. It has been found that the electromagnetic force in the PS-FRPM linear machine is produced …

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Mechanical And Acoustic Properties Of Composite Material In A Secondary Roof To Reducing The Cooling Load, Nassr Hussein, Aseel Mohammed, Hatam Kadhom Aug 2026

Mechanical And Acoustic Properties Of Composite Material In A Secondary Roof To Reducing The Cooling Load, Nassr Hussein, Aseel Mohammed, Hatam Kadhom

Engineering and Technology Journal

The present investigation aims to perform experimental study to show the feasibility of application composite materials as secondary roofs, as well as their capability for reducing cooling load in building. Moreover, compare some of their mechanical properties and acoustic insulation with conventional secondary roofs. Three basic models, which are common, were chosen for the construction of buildings' roofs in Baghdad (concrete and concrete tiles as basic components of the first model, brick and clay tiles as basic components of the second model and brick and normal tiles as basic components of the third model). In addition, three composite materials were …

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