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2026

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Analysis And Design Of 460 Ghz Microwave Gyrotron Oscillator, Luma Abbas, Nedal Hussain Aug 2026

Analysis And Design Of 460 Ghz Microwave Gyrotron Oscillator, Luma Abbas, Nedal Hussain

Engineering and Technology Journal

This paper is concerned with the analysis and design of a gyrotron oscillator with 460 GHz that can excite both modes (TE231) the fundamental (230GHz) and (TE061, TE261) second harmonic (near 460GHz). The oscillator is operated with 12KV beam voltage and 100mA beam current, and a computer program was developed to study the cavity in this oscillator and the wave-particle interaction inside it using the forward finite difference technique as a numerical method. The input data of the program are electron energy, velocity ratio, normalized cavity length, the normalized value of the external magnetic field, the mode number (m,n,l), and …

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Considerations On Spark- Gap Channel Radius And Electrical Conductivity, Bassam Habib Aug 2026

Considerations On Spark- Gap Channel Radius And Electrical Conductivity, Bassam Habib

Engineering and Technology Journal

A simple phenomenological model is established to determine the temporal evolution of spark gap channel radius and electrical conductivity during the resistive phase period. The present determination is based on the Braginskii’s equation for the channel radius which includes the electrical conductivity of the discharge channel as a constant quantity. In the present model, however, the electrical conductivity is regarded as a time varyingquantity. Basing on this, a mathematical formulation for the channel radius as a function of time was derived, and this has made possible the derivation of an explicit expression for the conductivity as a function of time …

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Word Retrieval Based On Freak Descriptor To Identify The Image Of The English Letter That Corresponds To The First Letter Of The Word, Ekhlas Naser Aug 2026

Word Retrieval Based On Freak Descriptor To Identify The Image Of The English Letter That Corresponds To The First Letter Of The Word, Ekhlas Naser

Engineering and Technology Journal

For the reason of colossal technological developments, the requirement of image information methods became a significant issue. The aim of this research was to retrieve the word based on Fast Retina Key-points (FREAK) descriptor .The suggested system consists of four stages. In the first stage, the images of English letters are loaded. Points are detected via SUSAN in the second stage. FREAK used in the third stage and then a database was created containing 26 English letters. The image to be tested was entered and the points are extracted in the fourth stage and then Manhattan distance was used to …

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Synthesis Of Some New Derivatives Of Pyrrolidine-2-One And Studying Their Antibacterial Potentials, Nadia Betti, Redha Hussain, Sahar Kadhem Aug 2026

Synthesis Of Some New Derivatives Of Pyrrolidine-2-One And Studying Their Antibacterial Potentials, Nadia Betti, Redha Hussain, Sahar Kadhem

Engineering and Technology Journal

New derivatives of pyrrolidine-2-one have been synthesized through lactamization of γ –butyrolactone (GBL) by hydrazine hydrate (80%), ethylene diamine and ethanol amine to afford compounds (1-aminopyrrolidin-2-one), (1-(2-aminoethyl)pyrrolidine-2-one) and (1-(2-hydroxyethyl)pyrrolidine-2-one), respectively. Compound (1-aminopyrrolidin-2-one) underwent several reactions to synthesize the rest of these derivatives. All synthesized compounds were approved by their FT-IR, 1H-NMR and some by Mass spectra. The biological activities of these derivatives were evaluated against Escherichia coli and Staphylococcus aureus. Many of these derivatives showed moderate biological activity against one or both kind of bacteria in comparison to amoxicillin and some showed no biological activity at all.

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Study The Effect The Laser Intensity On The Behavior Of The Kinetic Energy, Drift Energy And The Total Energy Of The Silver Plasma, Esam Tawfiq Aug 2026

Study The Effect The Laser Intensity On The Behavior Of The Kinetic Energy, Drift Energy And The Total Energy Of The Silver Plasma, Esam Tawfiq

Engineering and Technology Journal

The particle-in-cell plasma simulation program in two dimensions was developed to display the properties of silver plasma under the effect of Ruby laser 694.3 nm with different intensities; 1012Wcm-2, 1015 Wcm-2, 1018 Wcm-2, and 1020 Wcm-2. The time evolution and the properties of total energy, kinetic energy, and drift energy of the system were examined in the region near the critical density (ne=0.2ncr). The charged particles respond to the laser pulse after a specified period of interaction time in the form of an increase in the energy of the system. This response depends on the intensity of the laser pulse …

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Key Generation From Multibiometric System Using Meerkat Algorithm, Duha Salman, Raghad Azeez, Abdul Mohssen Hossen Aug 2026

Key Generation From Multibiometric System Using Meerkat Algorithm, Duha Salman, Raghad Azeez, Abdul Mohssen Hossen

Engineering and Technology Journal

Biometrics are short of revocability and privacy while cryptography cannot adjust the user’s identity. By obtaining cryptographic keys using biometrics, one can obtain the features such as revocability, assurance about user’s identity, and privacy. Multi-biometrical based cryptographic key generation approach has been proposed, subsequently, left and right eye and ear of a person are uncorrelated from one to other, and they are treated as two independent biometrics and combine them in our system. None-the-less, the encryption keys are produced with the use of an approach of swarm intelligence. Emergent collective intelligence in groups of simple autonomous agents is collectively termed …

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Image Encryption Algorithm Based On Substitution Principle And Shuffling Scheme, Atyaf Hamad, Alaa Farhan Aug 2026

Image Encryption Algorithm Based On Substitution Principle And Shuffling Scheme, Atyaf Hamad, Alaa Farhan

Engineering and Technology Journal

This research presents a method of image encryption that has been designed based on the algorithm of complete shuffling, transformation of substitution box, and predicated image crypto-system. This proposed algorithm presents extra confusion in the first phase because of including an S-box based on using substitution by AES algorithm in encryption and its inverse in Decryption. In the second phase, shifting and rotation were used based on secrete key in each channel depending on the result from the chaotic map, 2D logistic map and the output was processed and used for the encryption algorithm. It is known from earlier studies …

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A Study Of Some Mechanical And Physical Properties For Palm Fiber/Polyester Composite, Samah Hussein Aug 2026

A Study Of Some Mechanical And Physical Properties For Palm Fiber/Polyester Composite, Samah Hussein

Engineering and Technology Journal

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before reinforcement. The samples have been prepared by using hand lay-up technique with fiber volume fraction of (10%, 20% and 30%). After preparation of the mechanical and physical properties have been studied such as, compression, flexural, impact strength, thermal conductivity, Dielectric constant and dielectric strength. The polyester composite reinforced with date palm fiber at volume fraction (10% and 20%) has good mechanical properties rather than pure unsaturated polyester material, while the composite reinforced with …

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Ethanol Gas Sensor Fabrication Based On Zno Flower Like Nanorods, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal Aug 2026

Ethanol Gas Sensor Fabrication Based On Zno Flower Like Nanorods, Abdulqader Faisal, Mofeed Jaleel, Fahad Kamal

Engineering and Technology Journal

Zinc oxide flower-like nanorods (ZnO NRs) was successfully synthesized via the hydrothermal method. The growth process was conducted with seed layer concentrations of 20mM. The as-synthesized nanostructures were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and ultraviolet-visible (UV-VIS) spectrophotometer. The analysis results revealed a pure Wurtzite ZnO hexagonal nanostructures with preferred orientation (002) along the c-direction. The calculated band gap of average crystallite size is 3.2eV and 25 nm respectively. New designed, constructed and successfully calibrated for ethanol gas sensing was found. The ethanol gas sensor was fabricated at room temperature based on the …

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Cyclic Settlement Of Footings Of Different Shapes Resting On Clayey Soil, Aseel Najim, Mohammed Fattah, Makki Al-Recaby Aug 2026

Cyclic Settlement Of Footings Of Different Shapes Resting On Clayey Soil, Aseel Najim, Mohammed Fattah, Makki Al-Recaby

Engineering and Technology Journal

An experimental investigation is carried out to investigate the impact of the footing shape, when rested on clayey soil under cyclic loading condition. The model footings used in this study are circular, square and the area of footings is fixed. Cyclic load test is carried out on the cohesive soil with three undrained shear strengths (20 kPa, 40 kPa and 70 kPa). Two depths of foundation embedment (at surface and 5 cm) to know the effect of the depths of the foundations on the change of settlement and total vertical stress and two rates of loading (3 mm/sec and 6 …

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Characteristics Of Exhaust Emissions For A Diesel Engine Fuelled By Corn Oil Biodiesel And Blended With Diesel Fuel, Abdulrahman Mahmood, Haqi Qatta, Saadi Al-Nuzal, Talib Abed Abed Aug 2026

Characteristics Of Exhaust Emissions For A Diesel Engine Fuelled By Corn Oil Biodiesel And Blended With Diesel Fuel, Abdulrahman Mahmood, Haqi Qatta, Saadi Al-Nuzal, Talib Abed Abed

Engineering and Technology Journal

Environmentally friend biodiesel fuel from corn oil was tested in single-cylinder 4-stroke diesel engine operated. Three blends of fuels were prepared from corn oil and diesel fuel viz. 7, 15, and 20 % (designated as B7, B15, and B20, respectively). Tests were conducted on this engine using these blends at a constant speed (1500 rpm) and varying loads (0 % to 100 %). The emissions of carbon monoxide, carbon dioxide, unburned hydrocarbons, nitrogen oxides (NOX) and smoke opacity were measured. In all engine loads, results showed that the emission of CO, HC, and smoke emissions were reduced, while that of …

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Diffraction Rings Pattern And Nonlinear Optical Properties Of Hybrid Zno-Nps / Epoxy Resin, Zahraa Al-Asady, Ali Al-Hamdani Aug 2026

Diffraction Rings Pattern And Nonlinear Optical Properties Of Hybrid Zno-Nps / Epoxy Resin, Zahraa Al-Asady, Ali Al-Hamdani

Engineering and Technology Journal

In this research, the diffraction ring patterns scan and single-beam Z-scan techniques were used to measure the nonlinear refractive index (n2) and nonlinear absorption coefficient (β). Nano-composite sample, which consists of zinc oxide nanoparticles (ZnO-NPs), and epoxy resin polymer. The sample was prepared by the casting method. A second harmonic generation Nd: YAG laser, which operates at 532 nm and intensity 3183 W/cm2 was used for the two techniques. Z-scan results showed that values for nonlinear refractive index n2 and nonlinear absorption coefficient β were obtained of 6.59*10-9 cm2/W and 1.75*10-3 cm/W respectively. While results for the D-scan technique showed …

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Discontinuous Control And Stability Analysis Of Step-Down Dc-Dc Voltage Converters, Bashar Midhat Aug 2026

Discontinuous Control And Stability Analysis Of Step-Down Dc-Dc Voltage Converters, Bashar Midhat

Engineering and Technology Journal

Step down DC-DC converters are power electronic circuits, which mainly used to convert voltage from a level to a lower level. In this paper, a discontinuous controller is proposed as a control method in order to control Step-Down DC-DC converters. A Lyapunov stability criterion is used to mathematically prove the ability of the proposed controller to give the desired voltage. Simulationsl1 are performedl1 in MATLABl1 software. The simulationl1 resultsl1 are presentedl1 for changesl1 in referencel1 voltagel1 and inputl1 voltagel1 as well as stepl1 loadl1 variations. The resultsl1 showl1 the goodl1 performancel1 of the proposedl1 discontinuousl1 controller.

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Comparative Study Of Different Organic Molecules As An Anti-Corrosion For Mild Steel In Kerosene, Eva Yaqo, Rana Anaee, Majid Abdulmajeed Aug 2026

Comparative Study Of Different Organic Molecules As An Anti-Corrosion For Mild Steel In Kerosene, Eva Yaqo, Rana Anaee, Majid Abdulmajeed

Engineering and Technology Journal

The investigation on the efficiency of three organic derivatives was done as inhibitors for carbon steel using electrochemical methods at four temperatures (303, 313, 323, and 333 K) and 100 ppm. The results showed that these prepared compounds gave good efficiencies at experimental conditions by adsorption process and they act as mixed-type inhibitor, the data of corrosion were measured and debated. Using SEM, the inhibited surface of specimens was characterized. In addition, for display the interaction between these compounds and the metallic surface, the Fourier transform infrared spectra was used. In addition, the activity of antibacterial of the inhibitors against …

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Multiwall Carbon Nanotube / Polyvinyl Alcohol Nanofibers Film, Electrical Conductivity Improvement, Akram Jabur Aug 2026

Multiwall Carbon Nanotube / Polyvinyl Alcohol Nanofibers Film, Electrical Conductivity Improvement, Akram Jabur

Engineering and Technology Journal

Conductive polymer films were prepared of polyvinyl alcohol (PVA) with (0, 2, 4, 6, 8, and 10) wt. % multiwalled carbon nanotubes (MWCNTs) by electrospinning technique. The morphologies of the synthesized films were tested by scanning electron microscopy (SEM). Average fiber diameters gauged statically was (115nm) for (PVA/10 wt. % MWCNT film) while (170nm) for pure PVA electro spun film. Electrical conductivity (EC) of Polymeric nanofiber films improve by increasing MWCNT addition concentration from (3.69 × 10-7 S/ cm) for the pure (PVA) film to (1.24 ×10-2 S/cm) for the film with 10 wt. % MWCNT. The maximum stress of …

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Kinematics Analysis Of 5 Dof Robotic Arm, Tahseen Abaas, Ali Khleif, Mohanad Abbood Aug 2026

Kinematics Analysis Of 5 Dof Robotic Arm, Tahseen Abaas, Ali Khleif, Mohanad Abbood

Engineering and Technology Journal

This paper presents the forward, inverse, and velocity kinematics analysis of a 5 DOF robotic arm. The Denavit-Hartenberg (DH) parameters are used to determination of the forward kinematics while an algebraic solution is used in the inverse kinematics solution to determine the position and orientation of the end effector. Jacobian matrix is used to calculate the velocity kinematics of the robotic arm. The movement of the robotic arm is accomplished using the microcontroller (Arduino Mega2560), which controlling on five servomotors of the robotic arm joints and one servo of the gripper. The position and orientation of the end effector are …

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Influence Of Cutting Speed On Residual Stresses By Machining Of Aisi 316l, Safa Lafta, Maan Tawfiq Aug 2026

Influence Of Cutting Speed On Residual Stresses By Machining Of Aisi 316l, Safa Lafta, Maan Tawfiq

Engineering and Technology Journal

RS have an important role in the performance of components and machined structures. The objective of this paper is to study the influence of cutting speed on RS in workpieces that are formed in orthogonal cutting. AISI 316L stainless steel since it has been used in many important industries such as chemical, petrochemical industries, power generation, electrical engineering, and food and beverage industry. Four cutting speeds are selected: (44, 56, 71 and 88) m/min. The alloy was machined by turning at constant depth of cut and various feed rate from (0.065 to 0.228) mm/rev. Residual stresses are examined by X-ray …

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Reducing Roof Solar Heat Gain By Using Double-Skin Ventilated Roofs, Mohannad Ghanim, Sabah Ahmed Aug 2026

Reducing Roof Solar Heat Gain By Using Double-Skin Ventilated Roofs, Mohannad Ghanim, Sabah Ahmed

Engineering and Technology Journal

Double skin ventilated roof is one of the important passive cooling techniques to reduce solar heat gain through roofs. In this research, an experimental study was performed to investigate the thermal behaviour of a double skin roof model. The model was made of two parallel galvanized steel plates. Galvanized steel has been used in the roof construction of industrial buildings and storehouses in Iraq. The effect of inclination angle (ϴ) from the horizontal and the spacing (S) between the plates was investigated at different radiation intensities. It is found that using a double skin roof arrangement with a sufficient air …

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Analysis Of Thermal And Insulation Performance Of Double Glazed Window Doped With Paraffin Wax, Jalal Jalil, Salih Salih Aug 2026

Analysis Of Thermal And Insulation Performance Of Double Glazed Window Doped With Paraffin Wax, Jalal Jalil, Salih Salih

Engineering and Technology Journal

In this paper, a numerical investigation has been performed to study the effect of varying the thermal properties of the paraffin wax on the performance of a double glazed window doped with it during the summer climate of Baghdad (33.3 °N, 44.4 °E). Using FORTRAN (f 90) constructed computer program, finite difference combined with the enthalpy method was utilized to deal with the conduction with phase change problems within the wax. Results obtained show that increasing the density, latent heat, and thickness of the paraffin wax PCM) would increase the temperature-time lag and reduce the temperature decrement factor of the …

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Design And Implementation Of A Fuzzy Logic Controller For Inverted Pendulum System Based On Evolutionary Optimization Algorithms, Ahmed Ghaliba, Ahmed Oglah Aug 2026

Design And Implementation Of A Fuzzy Logic Controller For Inverted Pendulum System Based On Evolutionary Optimization Algorithms, Ahmed Ghaliba, Ahmed Oglah

Engineering and Technology Journal

The inverted pendulum is a standard classical problem in the branch ofcontrol and systems. If a cart is bushed by force then its position and angleof the pendulum will be changed. Several controllers may employed,keeping the pendulum arm upright by controlling at the cart location. Inthis search paper, the fuzzy-like PID (FPID) controller has been used tocontrol the inverted pendulum, and the parameters of the controller aretuned with several evolutionary optimization algorithms like a geneticalgorithm (GA), ant colony optimization (ACO), and social spideroptimization (SSO.) The result of tuned FPID with evolutionaryoptimization is compared with conventional PID, and it shows that …

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Study Of The Corrosion Behavior Of Zinc-Aluminum Alloy Matrix Composite Reinforced With Nanosilica Produced By Stir Casting, Fatima Adnana, Niveen Abdul Kader, Mohammed Hamza Aug 2026

Study Of The Corrosion Behavior Of Zinc-Aluminum Alloy Matrix Composite Reinforced With Nanosilica Produced By Stir Casting, Fatima Adnana, Niveen Abdul Kader, Mohammed Hamza

Engineering and Technology Journal

In this investigation, Zn-Al alloy metal-matrix nano composites thatreinforced via various weight percentages (2%, 4%, 6%, and 8%) ofnanosilica (SiO2) particles were fabricated applying the technique of stircasting. Behaviors of the corrosion of the unreinforced alloy andreinforced composites were measured utilizing a potentiostat test in a (3.5wt.% NaCl) salt solution. The optical microscopy was employed toinvestigate the surface microstructure of the composite. Microstructureanalysis manifested that the uniform distributions of the reinforcingparticles in the composites are alike, consisting of a dendritic structure ofthe zinc alloy matrix with an excellent reinforcing particles steadydispersion. The improved results of the corrosion resistance for the …

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Air Temperature Modelling Depended On Remote Sensing Techniques, Zainab Mohammed, Riyad Al-Anbari, Oday Jasim Aug 2026

Air Temperature Modelling Depended On Remote Sensing Techniques, Zainab Mohammed, Riyad Al-Anbari, Oday Jasim

Engineering and Technology Journal

Air temperature (T air) near the land surface is a fundamental descriptor of physical environmental conditions and one of the most widely used climatic variables in global change studies. In this study, the researcher trying to suggest a model for estimating air temperature in summer season for any region through integrating of Iraqi Agrometeorological networkdaily (T air) with the moderate resolution imaging spectroradiometer (MODIS) land surface temperature (LST), Duration Day Length (DDL) and Digital Elevation Model (DEM). In this model, using satellite images for the study area and data of air temperature for four weather stations located in Babylon governorate …

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Development Of Path Planning Algorithm Using Probabilistic Roadmap Based On Ant Colony Optimization, Mohammed Abdulakareem, Firas Raheem Aug 2026

Development Of Path Planning Algorithm Using Probabilistic Roadmap Based On Ant Colony Optimization, Mohammed Abdulakareem, Firas Raheem

Engineering and Technology Journal

In this paper, a unique combination among probabilistic roadmap, ant colony optimization, and third order B-spline curve has been proposed to solve path-planning problem in complex and very complex environments. This proposed method can be divided into three stages. First stage is to construct a random map depending on the environment complexity using probabilistic roadmap algorithm. This could be done by sampling N nodes randomly in complex and very complex static environments, then connecting these nodes together according to some criteria or conditions. The constructed roadmap contains huge number of possible random paths that may connect the start and the …

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Effect Of Laser Shock Peening On Fatigue Stress Concentration Of Polyester Reinforced By Al-Micro Powder Composites, Ahmed N. Al- Khazraji, Ammar A. Mutasher Aug 2026

Effect Of Laser Shock Peening On Fatigue Stress Concentration Of Polyester Reinforced By Al-Micro Powder Composites, Ahmed N. Al- Khazraji, Ammar A. Mutasher

Engineering and Technology Journal

Laser shock peening is a widely common process for materials treatment and typically used for fatigue strength enhancement especially for metals. In this paper, its effect on polymeric composite materials studied experimentally. Unsaturated polyester was used as a matrix in order to composites preparation and Aluminum powder as fillers. A Hand lay-up technique has been used for composites making. Composites with three volume fractions of Aluminum powder were prepared (2.5%, 5%, and 7.5%). Fatigue specimens as a standard and with (1mm) semi-circular notch are prepared for testing. The fatigue test was performed at room temperature and stress ratio (R=-1). Laser …

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Production Of Self-Cleaning Sio2/Cnt Nanoparticles Substituted Cement Mortar, Layth Al-Gebory, Aseel B. Al‐Zubaidi, Ahmed A. Al‐Tabbakh Aug 2026

Production Of Self-Cleaning Sio2/Cnt Nanoparticles Substituted Cement Mortar, Layth Al-Gebory, Aseel B. Al‐Zubaidi, Ahmed A. Al‐Tabbakh

Engineering and Technology Journal

Manufacturing of building materials with unique properties is one of the most important key-parameters in the development of construction engineering and building materials. The development in the nanomaterials and nanotechnology can be utilized in this field. In this paper, production of eco-friendly, low water absorption and self-cleaning cement mortar reinforced with carbon nanotubes and nano-silica with different weight percentages (0.5%, 1.5%, and 2%) is performed. Results showed prominent improvement of hardness, compression strength and a decrease of water absorption and bending resistance in the reinforced cement mortars. The results show the possibility to control the mechanical properties of the cement …

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Improving The Stability And Critical Speed Of Rotor Bearing System By Using External Damping Source, Tariq M. Hammza, Nassear R. Hmoad, Ehab N. Abas Aug 2026

Improving The Stability And Critical Speed Of Rotor Bearing System By Using External Damping Source, Tariq M. Hammza, Nassear R. Hmoad, Ehab N. Abas

Engineering and Technology Journal

Improving the essential factors of rotor bearing system are the aim of this study. In addition to the presence of two ball bearings to support the rotor, two additional fluid film journal bearings have been used as an external damping sources. The ANSYS Mechanical APDL 18.0 was used to model rotor bearing system with existence of two additional fluid film journal bearings. Matlab software has been used to achieve the analytical solution. The results clearly showed that the maximum response displacement strongly decreasing and the critical speed has been enhance by using an external damping source as well as the …

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Investigation Of The Effect Of Nano Powder Mixed Dielectric On Edm Process, Rasha R. Elias Aug 2026

Investigation Of The Effect Of Nano Powder Mixed Dielectric On Edm Process, Rasha R. Elias

Engineering and Technology Journal

In this paper, Artificial Neural Network was adopted to predict the effect of current, the concentration of aluminum oxide (Al2O3) and graphite Nanopowders in dielectric fluid for the machining of Carbon steel 304 using Electrical Discharge Machining (EDM). The process variables were utilized to find their effect on Material Removal Rate (MRR), Surface Roughness (SR), and Tool Wear Rate (TWR). It was revealed from the experimental work that the addition of aluminum oxide and graphite Nanopowders into dielectric fluid maximizing MRR, minimized the SR and TWR at various variables. Minitab software was used in the design of experiments. Analysis of …

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Improved Wear Rate Resistance, Compression Strength And Hardness Of Polymethylmethacrylate Resin With Orange Peel Powder For Artificial Denture Base, Reem A. Mohammed Aug 2026

Improved Wear Rate Resistance, Compression Strength And Hardness Of Polymethylmethacrylate Resin With Orange Peel Powder For Artificial Denture Base, Reem A. Mohammed

Engineering and Technology Journal

The material utilized for manufacturing artificial dentures should have high-grade mechanical properties in order to resist heavy forces inside the mouth. This study includes investigation of some of the mechanical properties (wear rate resistance, compression strength, and hardness) of the specimens prepared by (hand lay-up) method. The wear behavior experiments were performed on (a pin-on-disk tester) under various factors 5%, 8%, 11%, 14%, 17% weight fraction of orange peel, (10, 15, 20 N) load applied and (5, 10, 15 minutes) sliding time, and analysis these experimentally by using the Taguchi’s experimental design (L9) (MINITAB 16). Tests explicated that the specimens …

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

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

Engineering and Technology Journal

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

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Automated Analysis Of Comments On Press Articles In Websites (Articles Literature As Case Study), Afra Abdulrahman, Abdul Monem Rahma Aug 2026

Automated Analysis Of Comments On Press Articles In Websites (Articles Literature As Case Study), Afra Abdulrahman, Abdul Monem Rahma

Engineering and Technology Journal

Due to the increasing electronic publishing sites for printed and certified newspapers, the reader faced the problem of reaching his goal by accessing these sites, which led to the neglect of a large section of important publications. The provision of an automated measure to verify the positive and negative articles based on the analysis of readers' comments on the articles is a necessity to see the important articles that are compatible with the corpus generated by us for inference. The project achieved the previous target and achieved a success rate. The Bag-of-Words Model (BoW) was used to obtain the repetition …

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