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Reducing Vibrations Generated In A Gas Turbine Model Ms9001e Used In South Baghdad Power Plant Station By Improving The Design Of Bearings With Damper, Alaa Abdulah, Muhannad Khalifa, Abdul Jabbar Hanfesh Jul 2026

Reducing Vibrations Generated In A Gas Turbine Model Ms9001e Used In South Baghdad Power Plant Station By Improving The Design Of Bearings With Damper, Alaa Abdulah, Muhannad Khalifa, Abdul Jabbar Hanfesh

Engineering and Technology Journal

Gas turbines are engines an energy plant makes use of for generating the rotary motion to show power generators. The gas turbine is largely a combustion engine for changing natural gas or different liquid fuels to rotational mechanical energy. Often, the gas turbine generates excessive noise or vibrations. In this work, the problem of vibrations occurrence in the gas turbine model MS9001E used in the south Baghdad power station is solved. This is done by making a groove in the bearing pad to increase the oil flow, replacing the bearing type with a tilt-pad bearing type with damper. The finite …

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Preparing Nanofluids (Al2o3) For Enhancement Performance Of Photovoltaic, Mohammed Saadoon, Ibtisam Hasan, Mohammed Mohammed Jul 2026

Preparing Nanofluids (Al2o3) For Enhancement Performance Of Photovoltaic, Mohammed Saadoon, Ibtisam Hasan, Mohammed Mohammed

Engineering and Technology Journal

Photovoltaic (PV) panels produce electrical energy comparable to the cumulative amount of PV radiation generated on surface of sun. The solar modules influence on temperature of PV panel and for work with its standard specifications in Iraqi environment can be used nanofluid for cooling PV and improve performance. The developed thermal model for proposed cooling method has shown on the way to be an efficient design tool that can help engineers to reduce the time and cost of experimental testing. The improvement in temperature reduction using direct flow technique at rear sides of PV panel achieved electrical and thermal performance …

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Experimental Study Of Air Ejector Performance To Cool Agricultural Products, Hassan Jawad, Qusay Abdul Ghafoor Jul 2026

Experimental Study Of Air Ejector Performance To Cool Agricultural Products, Hassan Jawad, Qusay Abdul Ghafoor

Engineering and Technology Journal

In this research, an ejector was designed and manufactured from brass metal as part of a cooling system to cool agricultural products, work of ejector is based on the Venturi principle. The primary fluid is air and steam of product is the secondary fluid, used the primary pressure (1, 8, 1) bar for the purpose of conducting the experiment. The ejector was manufactured from a number of interconnected parts to give the final shape. The performance of the ejector was analyzed theoretically, through operating of system evaporation of water take place in vessel  leads to cooling product at change operation …

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Distinguish The Textures Of Grasped Objects By Robotic Hand Using Artificial Neural-Network, Hassan Salman, Mohsin Hamzah, Sadeq Bakhy Jul 2026

Distinguish The Textures Of Grasped Objects By Robotic Hand Using Artificial Neural-Network, Hassan Salman, Mohsin Hamzah, Sadeq Bakhy

Engineering and Technology Journal

The object identification properties with tactile sensing are valuable in  interaction with the environment for both humans and robots, and it is the core of sensing used for exploration and determining properties of objects that are inaccessible from visual perception. Object identification often involves with rigid mechanical grippers, tactile information and intelligent algorithms. This paper proposes a methodology for feature extraction techniques and discriminates objects for different softness using adaptive robotic grippers, which are equipped with force and angle sensors in each four fingers of an underactuated robot hand. Arduino microcontroller and the Matlab program are integrated to acquire sensor …

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Numerical Analysis Of Linear Elevator Structure Using Finite Element Method, Saba Othman, Jamal Mohammed, Farag Mohammed Jul 2026

Numerical Analysis Of Linear Elevator Structure Using Finite Element Method, Saba Othman, Jamal Mohammed, Farag Mohammed

Engineering and Technology Journal

In this work, the structure of the linear elevator prototype had been investigated numerically using finite element method. The linear motor structure parameters analyzed using Maxwell ANSYS. The time-stepping method depending on Maxwell equations be applied for analyzing and optimizing the magnetic and force characteristics. While the elevator structure parameters were analyzed using ANSYS workbench based on the principle of virtual work. The frame considered as clamped- clamped beam, and the base of the car considered as thin plate with small deflection. The analysis done with maximum applied load of 360 N at 1.5 safety factor. The results show the …

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The Influence Of Convection Heat Transfers For Vertical Mini-Tubes Using Solvent Carbon Dioxide And Porous Media At Supercritical Pressure, Bilal Kkihlefa, Ameer Jaddoa, Ahmed Reja Jul 2026

The Influence Of Convection Heat Transfers For Vertical Mini-Tubes Using Solvent Carbon Dioxide And Porous Media At Supercritical Pressure, Bilal Kkihlefa, Ameer Jaddoa, Ahmed Reja

Engineering and Technology Journal

Porous media and solvent CO2 at supercritical pressure were investigated experimentally to study the effect of convection heat transfer in vertical mini-tubes. Mini-tubes diameter (5 and 8 mm) with medium porosity of 0.5 are proposed in experimental investigation. Experimental conditions consisted of bulk fluid, wall temperatures ranged from 33 to 55 oC, and 8 to 10 MPa of pressure. Reynolds number, Mass flow rate, and heat flux were 1750 to 21000, 0.5 to 4.5 Kg/h, and 3.25×104 to 1.1×105 W/m2 respectively. Some chemical additives like Ethanol, Chloroform, Acetone, Dimethyl sulfoxide, and Methanol were considered. A special focus was dedicated to …

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Experimental Investigation Of Dimensional Accuracy In Non-Traditional Sheet Metal Spinning Process For Producing Rectangular Spun Part, ِِAmmar Saleh, Aseel Abd, Aqeel Bedan Jul 2026

Experimental Investigation Of Dimensional Accuracy In Non-Traditional Sheet Metal Spinning Process For Producing Rectangular Spun Part, ِِAmmar Saleh, Aseel Abd, Aqeel Bedan

Engineering and Technology Journal

The non-conventional spinning process was adopted for producing polygons, but one of the process limitations is the error between design and the final product especially with no-mandrel. Dimensional accuracy was adopted for this purpose which gives an indicator of the ability of the formed part to matches the design and checking validated of the adopted methodology for producing rectangular cross-section spun parts, by comparing the coordinating points of real part with the points of the design model. The point of a real part was measured by using a sphere probe fixed on the three-axis milling machine and capturing the data …

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An Experimental Investigation Of The Dynamic Effects In Upper Drum Boiler Under Steam Mass Flow Rate Variation, Russul Mohammed, Hashim Hussein, Ali Numan Jul 2026

An Experimental Investigation Of The Dynamic Effects In Upper Drum Boiler Under Steam Mass Flow Rate Variation, Russul Mohammed, Hashim Hussein, Ali Numan

Engineering and Technology Journal

The dynamic effects in the “upper“ drum of the boiler (mechanical’s effects) are very complex problems and critical due to the pressure disturbance in the upper drum of the boiler. This work deals with an experimental investigation of the dynamic behavior of the boiler drum level system is reported from plant data (Al-Quds power plant) in Baghdad / Iraq under a particular condition of operating, and the mathematical equations of the boiler model variables explained and defined. The dynamic effects are investigated with increasing steam mass flow rate (10% and 20%) at the outlet of the boiler. The results showed …

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Utilization Of Satellite Images-Based Indices For Assessment Of Al-Hammar Marsh Restoration Plan, Bayda Dhaidan, Imzahim Alwan, Mahmoud Al-Khafaji Jul 2026

Utilization Of Satellite Images-Based Indices For Assessment Of Al-Hammar Marsh Restoration Plan, Bayda Dhaidan, Imzahim Alwan, Mahmoud Al-Khafaji

Engineering and Technology Journal

Wetland landscape characterization is an important component of determining the degree to which wetlands improve environmental conditions. The present study aims to create a model used to automated extraction of the land cover of the western part of the Al-Hammar Marsh south of Iraq, and then monitor the change in land cover overtime. A model builder in ArcGIS created based on a series of spectral-based indices included the Normalized Difference Vegetation Index (NDVI), the Normalized Difference Moisture Index (NDMI), and the Normalized Difference Water Index (NDWI), the OLI satellite images from 2013 to 2020, ENVI 5.3 and ArcGIS 10.4 were …

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Shear Strength Of Reinforced Fibrous-Self Compacted Concrete Box Girder Using Recycled Concrete Aggregate, Mohammed Hadi, Eyad Sayhood, Ali Resheq Jul 2026

Shear Strength Of Reinforced Fibrous-Self Compacted Concrete Box Girder Using Recycled Concrete Aggregate, Mohammed Hadi, Eyad Sayhood, Ali Resheq

Engineering and Technology Journal

Protection of environmental and conservation of natural resources is a fundamental issue in today’s world. In this research, the shear behavior of reinforced concrete box girders with recycled aggregate (RA), steel fiber, and internal diaphragms were investigated. Eleven reinforced concrete box girders with typical longitudinal and transverse reinforcement were tested under two point loading until failure. The RA was prepared by crushing the collected waste of concrete from the laboratory test cylinders and cubes. The experimental variables considered include; RA percent of 50%, 75%, and 100%(replacing from NA), steel fiber with volumetric ratios (Vf) of 0.5%, 1.0%, and 2%, diaphragm …

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Evaluating The Use Of Eggshell Waste Ash In High Strength Concrete, Basim Amanah, Wasan Khalil Jul 2026

Evaluating The Use Of Eggshell Waste Ash In High Strength Concrete, Basim Amanah, Wasan Khalil

Engineering and Technology Journal

This study aims to determine the effect of incorporating eggshell waste as partial compensation from Portland cement material on high-strength concrete mixtures' performance. The properties studied are workability, compressive and flexural strengths, water absorption, dry density, and thermal conductivity. In the same trend, the environmental impact of the replacement mentioned above is evaluated. Four different weight percentages (0%,5%,10%,15%, and 20%) of the cement were replaced with eggshells ash. The results indicate that the incorporation of eggshell powder improves the compressive strength and flexural strength by about 14.7% and 6.5%, respectively, at 28days age over control concrete mixes at 15% replacement. …

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Improvement Of Soft Clayey Soil By Bio-Polymer, Teba Abd, Mohammed Fattah, Mohammed Aswad Jul 2026

Improvement Of Soft Clayey Soil By Bio-Polymer, Teba Abd, Mohammed Fattah, Mohammed Aswad

Engineering and Technology Journal

This examination explains the utilization of bio-polymer powder for clayey soil enhancement. The article concentrates around examining the strength attitude of the clayey soils built up with homogenous bio-polymer. Carboxy methyl cellulose was determined as bio-polymer material to build up the normal soft clayey soil. The biopolymer has been added to the soil with two separated rates (0.5 and 3%) by total weight of soil. Different tests were carried out to consider the impact of utilizing this polymer as a balancing out specialist on the geotechnical properties of soil. It was estimated that as the bio-polymer content expands in the …

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Operation Of Mosul – Dokan Reservoirs And Samarra Barrage Using Hec – Ressim Model During Dry Period, Thabet Abdulateef, Raad Irzooki, Ali Abbas Jul 2026

Operation Of Mosul – Dokan Reservoirs And Samarra Barrage Using Hec – Ressim Model During Dry Period, Thabet Abdulateef, Raad Irzooki, Ali Abbas

Engineering and Technology Journal

The issue of time series records containing low inflow than normal, such critical period results in shortage in reservoir storage, thereby reduction in the reservoir's releases that satisfy the demands. When the expected available water is less than the demand, releases may be curtailed, and the reservoir is under stress. This study presents an application of HEC – ResSim model to simulate the operation of Mosul, Dokan Reservoirs, and Samarra Barrage during the dry period 19992000 (modeling of historical data). Simulated results and recorded data were compared in order to, first improve the applicability of the software to simulate reservoir …

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Distribution Of Pressures On Modified Stepped Spillway By Using Toothed-Steps, Jaafar Maatooq, Ameer Jasim Jul 2026

Distribution Of Pressures On Modified Stepped Spillway By Using Toothed-Steps, Jaafar Maatooq, Ameer Jasim

Engineering and Technology Journal

In the present study a new steeped spillway shape at which “toothed steps” have been adopted instead of traditional steps to enhance the amount and distribution of water pressure along the chute of the stepped spillway. Experiments were conducted under a skimming flow regime, on five physical models of spillway one of which consisted of traditional steps used as a base model. For all investigated models, the chute angle was 45° with fourteen steeps each of 3cm height. Generally, the results show that the new shape models enhance the pressure distribution and reducing the potential for negative pressures along the …

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Carbon Fiber-Based Cementitious Composites For Traffic Detection And Weighing In Motion, Dhurgham Ghadhban, Hasan Joni, Ali Al-Dahawi Jul 2026

Carbon Fiber-Based Cementitious Composites For Traffic Detection And Weighing In Motion, Dhurgham Ghadhban, Hasan Joni, Ali Al-Dahawi

Engineering and Technology Journal

New self-sensing cementitious composites embedded in the highway pavement for vehicle detection and weigh during motion is fabricated. Smart carbon fiber (CF) reinforced cement-based materials with high sensitive property are used as sensors. These smart composites may be able to detect the traffic and sense the weight in motion, thanks to their piezoresistive property. Cement-based sensors capability to vehicle detection was investigated in a real field at the University of Technology campus. Findings clarify that the CF-Based cementitious composites provide have a great potential to use as sensors for detect traffic and its composition also it possibly identifies different vehicular …

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Variation Of Consistency Limits And Compaction Characteristics Of Clayey Soil With Nanomaterials, Noor Tarsh, Mohammed Al-Neami, Kawther Al-Soudany Jul 2026

Variation Of Consistency Limits And Compaction Characteristics Of Clayey Soil With Nanomaterials, Noor Tarsh, Mohammed Al-Neami, Kawther Al-Soudany

Engineering and Technology Journal

The arrangement of the soil for every ground structure is so important and must be efficient to sustain the whole structure. The variables and properties that have influenced their behavior must be well known. The building constructed on soft soils may fail due to their low strength, and an excessive settlement of the soil under a constant load could occur, therefore, the improvement for such soils must be carried out before construction to eliminate or decrease the maintenance cost or failure in buildings. Nowadays, one of the new technologies using to improve problematic soil is nanomaterials. In this study, experimental …

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The Behavior Of Piles Installed In Medium Dense Sand Within Mse Wall System, Salah Hamza, Shaymaa Kadhim, Saad Al-Wakel Jul 2026

The Behavior Of Piles Installed In Medium Dense Sand Within Mse Wall System, Salah Hamza, Shaymaa Kadhim, Saad Al-Wakel

Engineering and Technology Journal

Mechanically Stabilized Earth Walls (MSE) were widely used in several essential infrastructures, such as the abutments on a bridge. The need for a support base of a shallow or a deep bridge increased in the MSE wall system. In this research, factors affecting the performance of laterally loaded piles embedded in medium dense sand with a relative density of 50% behind an MSE wall were studied using lower-scale models in the laboratory. For instance, the effect of pile offset and the slenderness ratio on the pile's lateral capacity and pressure on the MSE wall. Three different slenderness ratios were introduced …

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Function And Application Of Geogrid In Flexible Pavement Under Dynamic Load, Fatin Jebur, Mohammed Fattah, Ahmed Abduljabbar Jul 2026

Function And Application Of Geogrid In Flexible Pavement Under Dynamic Load, Fatin Jebur, Mohammed Fattah, Ahmed Abduljabbar

Engineering and Technology Journal

Nowadays, the increasing demand for road transport makes maintenance and repair of road infrastructures key tasks of road engineering. The current experimental work consists of laboratory model experiments to understand the conduct of sand as a subgrade under dynamic load and its effect on the flexible pavement and base layer. The reinforcement is applied at the interface between the base and subgrade using SS2 type of geogrid. The road layers are exposed to harmonic dynamic load with two load amplitudes of 10 and 15 kN and two frequencies of 0.5 and 1 Hz. The vertical stresses in the road layers …

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Characteristics Of Asphalt Binder And Mixture Modified With Waste Polypropylene, Mohammed Fattah, Wissam, Abdulkhabeer, Miami Hilal Jul 2026

Characteristics Of Asphalt Binder And Mixture Modified With Waste Polypropylene, Mohammed Fattah, Wissam, Abdulkhabeer, Miami Hilal

Engineering and Technology Journal

Improving asphalt materials to develop the overall performance of asphalt binders and mixtures has been the focus of several investigations made over the past few decades. The application of discarded waste plastics in asphalt modification was one of the steps taken in this direction. Using waste materials in pavement construction would not only enhances asphalt properties but would also bring out significant saving in road material costs and help towards tackling disposal problems of such waste materials, which tend to be hazardous in as much as they can cause pollution of water, soil, and air. The purpose of this paper …

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Settlement Of Shallow Foundation In Dry Sand Under An Earthquake, Mohammed Al-Neami, Falah Rahil, Ahmed Hussain Jul 2026

Settlement Of Shallow Foundation In Dry Sand Under An Earthquake, Mohammed Al-Neami, Falah Rahil, Ahmed Hussain

Engineering and Technology Journal

Seismically induced settlement of buildings with shallow foundations resting on dry sand soils has resulted in severe damage in recent earthquakes. A multi-degree of freedom shaking table and a fixed container were manufactured and used to study the foundation settlement. Series of shaking experiments on the shallow foundation situated in a center of the container and atop of a dry sandy soil has been performed to identify the mechanisms involved to calculate the foundation settlement induced by earthquake shaking. In this research, the important factors are identified, including shaking intensity, the soil relative density, the degree of freedom and the …

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Earthquake Response Of Model Footings On Soft Clays Strengthened By Stone Columns, Ann Raheem, Mohammed Fattah, Makki Al-Recaby Jul 2026

Earthquake Response Of Model Footings On Soft Clays Strengthened By Stone Columns, Ann Raheem, Mohammed Fattah, Makki Al-Recaby

Engineering and Technology Journal

The objective of the present study is to understand the behavior of soft soil strengthened by stone columns under dynamic seismic load. Ordinary and encased stone columns were used under different conditions. The present study converges around the dynamic response of stone columns of lateral shaking, the interaction of soil frame for understanding settlement mechanisms and the prediction of dynamic load limitations of foundations in soft soils subjected to seismic load (during vibrations).  The results of this research will provide the basis for assessing measures to reduce the severity of seismic hazards and the seismic design of foundation structures in …

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Chitosan Hydrogel For Removing Of Heavy Metal Ions From Water: A Review, Maysaa Ali, Shemaa Soud, Anaheed Hameed Jul 2026

Chitosan Hydrogel For Removing Of Heavy Metal Ions From Water: A Review, Maysaa Ali, Shemaa Soud, Anaheed Hameed

Engineering and Technology Journal

Industrial and agricultural discharges have been shown as important sources for a wide range of contaminants like heavy metals. This study focused on the assessment of the toxic effect of heavy metals and illustrates some methods of eliminating or avoiding these contaminants. In certain methods, heavy metals (Cu, Zn, Cr, Ni, Pb, Hg, and Cd) are recovered, and range of absorbents are tested. A number of studies have reported the complex interaction of polymers with metal ions with the polymers for eliminating heavy metals (e.g. cellulose, chitosan, and chitin. Metal ions are absorbed by these polymers by the amine and …

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Sensing Performance Of Mono And Bimetallic Nano Photonics Surface Enhanced Raman Scattering (Sers) Devices, Doaa Jubair, Alwan Alwan, Walid Hamoudi Jul 2026

Sensing Performance Of Mono And Bimetallic Nano Photonics Surface Enhanced Raman Scattering (Sers) Devices, Doaa Jubair, Alwan Alwan, Walid Hamoudi

Engineering and Technology Journal

In this research, sensing performance of mono and bimetallic nanophotonics SERS sensors of gold-silver nano-columns for the detection of chlorpyrifos was investigated. For optimum substrates for Gold-silver/nano-column surface-enhanced, Raman scattering (SERS) was achieved with the silicon substrate. By combining the Ag SERS activity with the Au chemical stability and nano-columns Si large field enhancement, the Au-Ag/nano-columns Si substrate revealed perfect reproducibility, homogeneity, sensitivity in addition to chemical stability. The sensors were tested by Atomic force microscope (AFM), field emission scanning electron microscope (FESEM), energy-dispersive X-ray analysis (EDS), and X-ray diffraction (XRD). Findings presented in this research indicated modified distributions and …

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Programing And Procedure Design Of Stand-Alone Pv System For Clean Energy Home Supply In Baghdad, Sarah Al-Shammari, Abdulhassan Karamallah, Sattar Habeeb Jul 2026

Programing And Procedure Design Of Stand-Alone Pv System For Clean Energy Home Supply In Baghdad, Sarah Al-Shammari, Abdulhassan Karamallah, Sattar Habeeb

Engineering and Technology Journal

Global demand for energy production is in an increasing trend. However, a gap between energy production and energy demand still represents an industrial challenge. Iraq, like too many developing countries, is an example of such problematic. To tackle these issues, renewable energy could be a valid solution. Renewable energy becomes necessary especially the unique location of the received solar energy and long daylight. Many pieces of research deal with maximum benefit from this condition. This paper discusses the design stand-alone PV system for one home in Baghdad and sizing all components in that system start with energy demand, inverter power, …

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Effect Of Embedment And Spacing Ratios On The Response Of Lateral Load Of Single And Group Piles, Mohammed Al-Neami, Mohammed Al-Dahlaki, Aya Chalob Jul 2026

Effect Of Embedment And Spacing Ratios On The Response Of Lateral Load Of Single And Group Piles, Mohammed Al-Neami, Mohammed Al-Dahlaki, Aya Chalob

Engineering and Technology Journal

This paper displays an experimental work of three-scale model tests of single pile and nine–scale model tests of group pile (1x2) with spacing to diameter (S/D) ratios (2,4, and 6) respectively. The pile models inserted in the medium-dense dry sand with a relative density of 60% and different length to diameter (L/D) ratios (15, 25, and 30) were subjected to the lateral load with a rate of 2.5 mm/min. The test results present the effect of the change of the ratio of (L/D) and (S/D) on lateral displacements at the head of the pile. For single and group piles when …

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Effect Of Growth Time On The Structural, Optical And Electrical Properties Of The 1%Fe Doped Tio2 P-Type Synthesized By Hydrothermal Technique, Sattar Hashim, Odai Salman, Khaleel Hassoon Jul 2026

Effect Of Growth Time On The Structural, Optical And Electrical Properties Of The 1%Fe Doped Tio2 P-Type Synthesized By Hydrothermal Technique, Sattar Hashim, Odai Salman, Khaleel Hassoon

Engineering and Technology Journal

In this work, a hydrothermal technique is employed to prepare titanium dioxide films on fluorine-doped tin oxide (FTO) substrates. A low-cost homemade autoclave was used to fabricate iron-doped -TiO2 films (1at. %Fe) at different reaction times from 1 to 4 hours.  X-ray diffraction (XRD) patterns showed that the predominant phase is rutile (R-TiO2) with peaks at (101), (002), and (112). The XRD results showed that with increasing reaction time the peaks become sharper and narrowed. The images of the field emission scanning electron microscope (FESEM) showed that with increasing reaction time the films appeared to have vertically aligned TiO2 nanorods. …

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A Survey In Implementation And Applications Of Electroencephalograph (Eeg)-Based Brain-Computer Interface, Samaa Abdulwahab, Hussain Khleaf, Manal Jasim Jul 2026

A Survey In Implementation And Applications Of Electroencephalograph (Eeg)-Based Brain-Computer Interface, Samaa Abdulwahab, Hussain Khleaf, Manal Jasim

Engineering and Technology Journal

A Brain-Computer Interface (BCI) is an external system that controls activities and processes in the physical world based on brain signals. In Passive BCI, artificial signals are automatically generated by a computer program without any input from nerves in the body. This is useful for individuals with mobility issues. Traditional BCI has been dependent only on recording brain signals with Electroencephalograph (EEG) and has used a rule-based translation algorithm to generate control commands. These systems have developed very accurate translation systems. This paper is about the different methods for adapting the signals from the brain. It has been mentioned that …

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Retrofitting Of Scc Deep Beams With Circular Openings Using Cfrp, Nabeel Al-Bayati, Dhiyaa Mohammed, Nawfal Abdul Jabbar Jul 2026

Retrofitting Of Scc Deep Beams With Circular Openings Using Cfrp, Nabeel Al-Bayati, Dhiyaa Mohammed, Nawfal Abdul Jabbar

Engineering and Technology Journal

The main objectives of this study are: encouraging the production and use of  self-compacting  concrete,  use  of  materials  which  are  lightweight,  easy to  use,  and  highly  efficient  in  the  retrofitting  of  reinforced  concrete buildings. Six deep beams specimens (L= length of 1400mm, h= height of 400mm,   and   b=   width   of   150mm)   were   cast   using   self-compacting concrete.  The  location  of  the  openings  is  in  the  middle  of  assumed  load path.  Five  patterns  were  adopted  to  arrange  carbon  fiber  reinforced polymer (CFRP) strips. The cylinder compressive strength of the concrete was  approximately  equal  for  all  beams  and  was  about  (44  MPa)  at …

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Effect Of Pile's Number On The Behavior Of Piled Raft Foundation, Dheyaa Hadi, Mohanned Waheed, Mohammed Fattah Jul 2026

Effect Of Pile's Number On The Behavior Of Piled Raft Foundation, Dheyaa Hadi, Mohanned Waheed, Mohammed Fattah

Engineering and Technology Journal

This paper introduces an experimental research on the behavior of the piled raft foundation (PRF) in sand of two states (loose and medium sand). A small model has been tested in a soil container and the vertical load was applied to the foundation through a pneumatic jack. The settlement of the foundation was measured using a displacement transducer; three sensors were attached to the pile heads to measure the axial load borne in a group by each pile by the Arduino data logger. The laboratory experiments were carried out on models of (1 pile), (1x2), (1x3), (2x3), (3 x3), (3 …

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Preparation Of Nickel Oxide Microparticles By Pulsed Laser Ablation And Application To Gas Sensors, Nedal Hussain, Luma Abbas, Lamyaa Latif Jul 2026

Preparation Of Nickel Oxide Microparticles By Pulsed Laser Ablation And Application To Gas Sensors, Nedal Hussain, Luma Abbas, Lamyaa Latif

Engineering and Technology Journal

Nickel oxide (NiO) microparticles were synthesized by pulsed laser ablation in double deionized water and intensively studied using Nd:YAG laser. The obtained sample was examined by X-ray diffraction, XRD measurement which tests the existence of polycrystalline. The structural parameters introduced and surface morphology was studied using field emission scanning electron microscopy devices. The optical properties of microparticles in a liquid were investigated through UV-VIS spectroscopy. The CO/CO2 sensing properties of the NiO microstructure sensors were systematically investigated, and the effects of different laser fluencies on the CO/CO2 sensing characteristics were analyzed. XRD measurements reflected the existence of polycrystalline, the optical …

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