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Development And Uncertainty Assessment Of Secondary Method For Ph Measurement In Physicochemical Measurements, Sarvar Rakhmatullaev, Dostonbek Xujakulov, Mohinur Nigmatova Aug 2026

Development And Uncertainty Assessment Of Secondary Method For Ph Measurement In Physicochemical Measurements, Sarvar Rakhmatullaev, Dostonbek Xujakulov, Mohinur Nigmatova

Chemical Technology, Control and Management

In physicochemical measurements across various industries, laboratory analyses commonly require the determination of pH as an indicator of hydrogen ion activity in aqueous solutions. Ensuring the accuracy and reliability of these measurements, obtaining precise readings from pH measuring instruments, and maintaining overall measurement quality represent critical challenges in guaranteeing the safety of both products and processes. This requires constant monitoring, accuracy assessment, calibration, metrological verification, and control of measuring instruments. In this case, it should be carried out not with solutions prepared in any laboratory, but with certified reference materials (СRM) with appropriate regulatory framework, ensuring metrological observation. …

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Plaza Off The Park, Hdfc V. Mcgowan Aug 2026

Plaza Off The Park, Hdfc V. Mcgowan

All Decisions

Court dismissed holdover against proprietary lessee in HDFC because petition failed to accurately describe the regulatory status of the unit and tenancy as required by RPAPL § 741(4). Court held that respondent's ability to independently discover the correct regulatory status does not obviate the landlord's burden to describe the premises accurately in the petition from the start.

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The Role Of Male Early Childhood Teachers In Responding To Fatherless Parenting Issues Through Inclusive Education, Dyah Ageng Pramesty Koenarso Aug 2026

The Role Of Male Early Childhood Teachers In Responding To Fatherless Parenting Issues Through Inclusive Education, Dyah Ageng Pramesty Koenarso

Journal of Innovation and Teacher Professionalism

Growing attention to father absence and limited paternal involvement in Indonesia highlights the importance of professional and supportive practices in early childhood education (ECE). This study examines how male ECE teachers respond professionally to children whom they understand to experience father absence or limited paternal involvement. Using a qualitative case study design, the study involved 13 male ECE teachers from 13 institutions in South Kalimantan. Data were collected from May to August 2025 through 26 semi-structured interviews and 39 classroom observations and were analyzed using an interactive qualitative analysis approach. The findings show that participants provided pedagogical guidance, relational and …

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Cost Analysis Of Rheumatoid Arthritis In Insured Patients And Its Determinant Factors: Data From A National Referral Hospital In Indonesia, Rudy Hidayat, Fara Fauzia, Mochammad Alfansyah Dhifanra, Aries Maulana Aug 2026

Cost Analysis Of Rheumatoid Arthritis In Insured Patients And Its Determinant Factors: Data From A National Referral Hospital In Indonesia, Rudy Hidayat, Fara Fauzia, Mochammad Alfansyah Dhifanra, Aries Maulana

Kesmas

Rheumatoid arthritis (RA) leads to progressive functional impairment and considerable economic burden. This study estimated the annual (12-month) cost per patient among patients with RA and its determinant factors. A descriptive cross-sectional economic study of RA patients who had been treated for at least one year at the outpatient clinic of a national referral hospital in Jakarta, Indonesia, and met the 2010 ACR–EULAR criteria. Data collected from January 2023 to December 2024 were obtained from medical and billing records for demographic characteristics, direct medical costs, and DAS28-based disease activity, whereas non-medical and indirect costs were collected through structured patient interviews. …

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Extended Meshfree Approach For Crack Statistical Analysis Of Anisotropic Functionally Graded Brazilian Disc Subjected To Traction Load, Hassanein Khalaf, Haider Mehbes, Ameen Nassar Aug 2026

Extended Meshfree Approach For Crack Statistical Analysis Of Anisotropic Functionally Graded Brazilian Disc Subjected To Traction Load, Hassanein Khalaf, Haider Mehbes, Ameen Nassar

Engineering and Technology Journal

An extended meshless method that relying upon Galerkin formulation is applied on the crack analysis of orthotropic functionally graded Brazilian disc. Weak form is involved to solve the governing equation in the numerical method. In addition, enrichment terms and sub-triangle techniques are applied to improve the accuracy of relevant results. This paper depicts the influence of variation in the crack stretch and non-homogeneity parameters on the values of stress intensity factors using a developed MATLAB program. In the isotropic case, it is clear that when the length of crack increases, SIF increases. Graduation in has more effect in increasing the …

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Incorporation Of Iraqi Rocks In The Production Of Eco-Friendly Cement Mortar, Rawnaq Mahdi, Aseel Al-Zubaidi, Hassan Hashim Aug 2026

Incorporation Of Iraqi Rocks In The Production Of Eco-Friendly Cement Mortar, Rawnaq Mahdi, Aseel Al-Zubaidi, Hassan Hashim

Engineering and Technology Journal

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable …

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Comparative Study Of Specifications Between Local And Imported Water Pumps And An Energy-Efficient Local Developed Pump, Maryam Abdul Wahid, Lamyaa Dawood Aug 2026

Comparative Study Of Specifications Between Local And Imported Water Pumps And An Energy-Efficient Local Developed Pump, Maryam Abdul Wahid, Lamyaa Dawood

Engineering and Technology Journal

Conserving energy is one of those important requirements of the environment. In this research, an eco-friendly power saving Water pump [Air coolers] is developed. This development is based on GQFD. The model of this developed Water pump is drawn by a CAD solid model (version 7, Autodesk AutoCAD 2011). The electrical motor is responsible for the rotation of the pillar and further distributes Water inside the Air cooler [regardless of the size]. In the developed model motor is canceled where the rotation is throughout attachment to the Air cooler. A further prototype of this model is made were common and …

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Path Planning Of Mobile Robot Using Improved Artificial Bee Colony Algorithm, Rkaa Kamil, Mohamed Mohamed, Bashra Oleiwi Aug 2026

Path Planning Of Mobile Robot Using Improved Artificial Bee Colony Algorithm, Rkaa Kamil, Mohamed Mohamed, Bashra Oleiwi

Engineering and Technology Journal

A modified version of the artificial Bee Colony Algorithm (ABC) was suggested namely Adaptive Dimension Limit- Artificial Bee Colony Algorithm (ADL-ABC). To determine the optimum global path for mobile robot that satisfies the chosen criteria for shortest distance and collision–free with circular shaped static obstacles on robot environment. The cubic polynomial connects the start point to the end point through three via points used, so the generated paths are smooth and achievable by the robot. Two case studies (or scenarios) are presented in this task and comparative research (or study) is adopted between two algorithm’s results in order to evaluate …

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Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied Aug 2026

Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied

Engineering and Technology Journal

The removal of Iron from produced water using adsorbent materials is taking a space of attention from the perspective of researchers. In this work, the characterization of chemically modified silica used as Iron ions adsorbent using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), laser granularity instrument was performed. The point of zero charge (PZC) of modified silica was determined using titration method. Different parameters were used to better approach Iron removal. These parameters are 0.2 and 0.4 mg/l modified silica adsorbent dose, 30-180 min adsorption time and pH values of 4-10. The results showed that modified silica exhibited …

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Properties Of Self-Compacting Cementitious Composite Materials Containing Cement Kiln Dust Powder, Ahmed Kadhim, Alaa Atiyah, Shakir Salih Aug 2026

Properties Of Self-Compacting Cementitious Composite Materials Containing Cement Kiln Dust Powder, Ahmed Kadhim, Alaa Atiyah, Shakir Salih

Engineering and Technology Journal

This paper aims to investigate the influence of utilization micro cement kiln dust as a sustainable materials additive in order to reduce the voids and micro cracks in the cementitious mortar materials which cause a drastic reduction in the load carrying capacity of the element. Its therefore very important to decrease the pores and enhance the mechanical strength of the cementitious composite materials. In this article, the properties of self-compacting mortar containing micro cement dust additive was experimentally assessed. Micro cement dust powder was added to the self-compacting mortar in (1, 2, 3, 4 and 5 %) percentage by weight …

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Effect Of Modified Asphalt Cement Of The Performance Of Stone Matrix Mixtures, Duaa Khalaf, Zaynab Qasim, Karim Al Helo Aug 2026

Effect Of Modified Asphalt Cement Of The Performance Of Stone Matrix Mixtures, Duaa Khalaf, Zaynab Qasim, Karim Al Helo

Engineering and Technology Journal

This research investigates the behavior of Stone Matrix Asphalt mixtures (SMA) modified with styrene-butadiene-styrene (SBS) polymer at four percentages (1, 2, 3 and 4%) by weight of asphalt cement. The moisture susceptibility and rutting were taken into consideration in this study. To achieve the objective of this research the superpave system is conducted to design the asphalt mixtures. The physical properties of aggregate, bitumen and other mix materials were assessed and evaluated with the laboratory tests. The mixtures were prepared using penetration Graded (40-50) bitumen and a chemical named Polypropylene Fibers was used as a stabilizing additive. Fibers have been …

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Engine Performance With Diesel-Biodiesel Blends Fuel And Emission Characteristics, Marwa Kareem, Adel Saleh Aug 2026

Engine Performance With Diesel-Biodiesel Blends Fuel And Emission Characteristics, Marwa Kareem, Adel Saleh

Engineering and Technology Journal

In this study, the sunflowers oil was utilized as for producing biodiesel via a chemical operation, which is called trans-esterification reaction. Iraqi diesel fuel suffers from high sulfur content, which makes it one of the worst fuels in the world. This study is an attempt to improve the fuel specifications by reducing the sulfur content of the addition of biodiesel fuel to diesel where this fuel is free of sulfur and has a thermal energy that approaches to diesel.20%, 30% and 50% of Biodiesel fuel were added to the conventional diesel. Performance tests and pollutants of a four-stroke single-cylinder diesel …

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Optimizing Of Coating Layers Parameters Of (Nano Hydroxyapatite/Tio2 Nps) On Nitinol Smas By Electrophoretic Deposition, Riyam Rawdan, Makarim Abdulkareem, Ali Mustafa Aug 2026

Optimizing Of Coating Layers Parameters Of (Nano Hydroxyapatite/Tio2 Nps) On Nitinol Smas By Electrophoretic Deposition, Riyam Rawdan, Makarim Abdulkareem, Ali Mustafa

Engineering and Technology Journal

This study aims to obtain the optimal variable for depositing (HA, TiO2 and Composite) Nanomaterial on NiTi SMAs. Taguchi approach (with L9 array) was used to obtain the optimal conditions for coating produced by Electrophoretic deposition (EPD) techniques. The deposition process was done in different conditions (voltage, time, concentration and degree of grinding). Voltages were used (20, 40 and 60) volts, the time is (2, 4 and 6) min, the degree of the surface roughness (180, 500 and 1200) μm while the concentration of HA and TiO2 are (2, 4, and 6) g/L for each one. Chitosan (biopolymer) was used …

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An Analytic Design Approach To Inverse Class-F Rf Power Amplifiers, Firas M. Ali, Mahmuod H. Al-Muifraje, Thamir R. Saeed Aug 2026

An Analytic Design Approach To Inverse Class-F Rf Power Amplifiers, Firas M. Ali, Mahmuod H. Al-Muifraje, Thamir R. Saeed

Engineering and Technology Journal

The design of high efficiency inverse class-F (class-F-1) radio frequency (RF) power amplifiers includes extensive measurements to characterize the RF power device by means of the empirical load-pull test setup. This paper presents an alternative characterization approach based on evaluating the load impedances analytically at the desired harmonic frequencies for a high electron mobility transistor (HEMT) in terms of the internal and package elements of the active device. It additionally provides a method for extracting the parasitic elements of the power device as well as determining the optimum load-line resistance using the transistor manufacturer’s large signal model. A new topology …

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Ethical Responsibility In The Practice Of Architecture, Abdullah Almaamouri Aug 2026

Ethical Responsibility In The Practice Of Architecture, Abdullah Almaamouri

Engineering and Technology Journal

The research deals with the concept of ethical responsibility as one of the most influential concepts in the process of practicing architecture. It is defined as “systems of ethical principles and engineering rules governing the architect in making decisions of design practice, making them sound, preventing them from making mistakes during the stages of design, and the maintenance “by the commitment to them, result in creative architectural texts benefit the individual and society,” and thus determine the research problem in (Lack of cognitive perception of the role of moral responsibility in the practice of architecture). Therefore, the research aims at …

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Code Of Conduct Of Final Year Projects In Engineering Disciplines, Fawzi Al-Naima Aug 2026

Code Of Conduct Of Final Year Projects In Engineering Disciplines, Fawzi Al-Naima

Engineering and Technology Journal

The importance of the management and implementation of graduation projects lies in the fact that this activity constitutes one of the main pillars of the undergraduate academic curricula in most scientific or literary disciplines. In engineering studies, for example, the weight of the graduation project within the curriculum is estimated at 25% for the year of graduation and about 8% of the total weight of the first university degree in most universities in the developed countries. In this context, this paper suggests specific steps for conducting this work and the allocation of responsibilities in the management of this scientific activity. …

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Assessment Of The Desalinationeffect On Shatal-Arab, Mohammed Al-Hashimi, Falah Alnedawy Aug 2026

Assessment Of The Desalinationeffect On Shatal-Arab, Mohammed Al-Hashimi, Falah Alnedawy

Engineering and Technology Journal

The resource of the dulcet water decreasing on our plant. Obstacles and problems that face water resources are the pollution and increasing of industrial wastes because of the human activities, lack of water resources in a place is considered dryness on well as unacceptable quality and quantity. The effect of outstretch and tide in estuaries of rivers increase the concentration of the salt in surface water. The city of Basra suffers from the lack of water discharge and high concentration of salt , wastewater, and the salt wedge ascending from downstream of Shat al – Arab river. The water decrease …

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Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim Aug 2026

Isolation And Identification Of Ureolytic Bacteria Isolated From Livestock Soil To Improve The Strength Of Cement Mortar, Hussein Khadhim, Saad Ammar, Shahlaa Ebrahim

Engineering and Technology Journal

The aim of the present study is to isolate and recognize calciumcarbonate-producing bacteria and to check these bacterial strains for use incement mortar to improve its properties such as strength and water absorption.Bacteria were isolated from livestock soils were examined for urease producingactivity, the possibility to precipitate calcite and its activity to improve thecompressive strength. Based on the results, four isolates were selected andidentified. They were characterized as B. atrophaeus, B. subtilis, B. aryabhattaiand B. amyloliquefaciens. Experimental work was performed to evaluate theeffect of bacterial concentration in term of optical density (OD) on thecompressive strength. Bacterial cement mortar samples revealed …

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Application Of Wheat Husk In Color Removal Of Textile Wastewater, Mohamed Mohammed, Anaam Sabri, Eman Taha Aug 2026

Application Of Wheat Husk In Color Removal Of Textile Wastewater, Mohamed Mohammed, Anaam Sabri, Eman Taha

Engineering and Technology Journal

Adsorption is the most efficient technique used to remove organic pollutants from wastewater. Dyes represent one of the pollutants that may remove by adsorption. The textile industry used dyes for colorization of fibers and always generates a considerable amount of colored wastewater. In present work, the removal of Malachite green (MG) dye pollutant from synthetic wastewater onto mesoporous Wheat husk (WH) was studied in batch adsorption systems. The characterization for the prepared wheat husk was studied by, scanning electron microscopy (SEM), Fourier transforms infrared (FTIR) spectroscopy. The batch experiments were carried out to measure the removal efficiency of MG as …

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Experimental Study Of 2-Amino-5-(4- Nitrophenyl)-1, 3, 4-Thiadiazole For Ms In Hcl Solution, Talib Abed, Khalida Al-Azawi, Shaimaa Jaber, Ahmed Al-Amiery Al-Amiery, Shaimaa Al-Baghdadi Aug 2026

Experimental Study Of 2-Amino-5-(4- Nitrophenyl)-1, 3, 4-Thiadiazole For Ms In Hcl Solution, Talib Abed, Khalida Al-Azawi, Shaimaa Jaber, Ahmed Al-Amiery Al-Amiery, Shaimaa Al-Baghdadi

Engineering and Technology Journal

The present work aims to study the inhibition performance of new organic inhibitor namely ANTD “2-amino-5-(4-nitrophenyl)-1,3,4- thiadiazole” on corrosion of mild steel (MS) in HCl environment at the concentration of 1.0 M through using weight loss techniques. Weight lost measurements demonstrates the presence of a film on MS surface in existence of organic substance. The inhibition performance of ANTD at various concentrations for mild steel increases with increasing concentration and with an increased in the immersion time and decreased with raising temperatures degrees. The optimal inhibition efficiency of (ANTD), 82%, was achieved for mild steel when immersed with the highest …

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Treatment Of Crude Oil Spills In Water Resources By Using Biological Method, Ibtihaj Abdulrazzak, Mohammed Hafiz, Ali Ibrahim Aug 2026

Treatment Of Crude Oil Spills In Water Resources By Using Biological Method, Ibtihaj Abdulrazzak, Mohammed Hafiz, Ali Ibrahim

Engineering and Technology Journal

Biological treatment has definite to be an effective and excellent method for the removal of aquatic oil spills. It is competent of being used as the best treatment method for cleanup of oil spills. Being a potential technology, significant work needs to be done to improve the capabilities of bioremediation for oil contaminated-aquatic environment. Novel application of combined solvent extraction and two-phase biodegradation processes using Two-Liquid Phase Partitioning Bioreactor (TLPPB) technique was proposed and developed to enhance the cleanup of high concentration of crude oil from aqueous phase using acclimated mixed consortiums in an anaerobic environment. Silicone oil was used …

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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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Formation Control Of Mobile Robots Using Sliding Mode Control Based On Conditional Servocompensator, Laith Majeed Aug 2026

Formation Control Of Mobile Robots Using Sliding Mode Control Based On Conditional Servocompensator, Laith Majeed

Engineering and Technology Journal

In this paper, the problem of controlling a group of mobile robots is considered; each one operates with the nonlinear nonholonomic under actuated dynamics. A coordinated control scheme is designed based on leader-follower(s) method to achieve prescribed formation maneuvers. This objective is fulfilled using the approach of sliding mode controller based on conditional servocompensator, which will bring the system error trajectories into a positively invariant set (boundary layer) close to the origin. Then, a special form of servocompensator conditional integrator, which will be active only inside the boundary layer, will regulate the trajectories to the origin in finite time. Compared …

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Experimental And Numerical Study Of The Earing Defect During Square Deep Drawing Process, Kariem Younis, Adil. Jaber Aug 2026

Experimental And Numerical Study Of The Earing Defect During Square Deep Drawing Process, Kariem Younis, Adil. Jaber

Engineering and Technology Journal

Deep drawing process is a very complex process which controls a lot of parameters and the associated defects. The aims of this research are to discuss the effect of parameters of the process utilized in square deep drawing process such ; material properties, blank size, blank shape on the height and shape of earing defect appear of the drawn cup. Three dimensions model from low carbon steel (AISI 1008) with thickness 0.7mm of square cup (41.4mm by 41.4mm). The finite element software (ANSYS 11) was utilized to carry out the numerical simulation of the deep drawing process, and the experimental …

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Investigation Of The Effect Of Loading Paths In The Tube Hydroforming Process, Adil. Jaber Aug 2026

Investigation Of The Effect Of Loading Paths In The Tube Hydroforming Process, Adil. Jaber

Engineering and Technology Journal

The control accurately of internal pressure, axial feeding and paths of loading which have important influences on the final tube quality. In this research an impact of loading path of the tube hydroforming process and final part requirements ( i.e. thickness specification and shape conformation) were studied numerically. Small bulge shape tube hydroforming parts were utilized in the finite element analyses to get several guidelines on the effect of the relation between the internal pressure and axial compressive feeding programs. Two dimension model of bulge shape tube (50 mm) bulge width has been developed from cylindrical tube with thickness (2mm) …

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Size Miniaturized Fractal Nested Circular Rings-Shaped Microstrip Antenna For Various Wireless Applications, Shereen Shandal, Mahmood Mosleh, Mohamed Kadim Aug 2026

Size Miniaturized Fractal Nested Circular Rings-Shaped Microstrip Antenna For Various Wireless Applications, Shereen Shandal, Mahmood Mosleh, Mohamed Kadim

Engineering and Technology Journal

In this paper; a wideband fractal circular rings shaped microstrip antenna over partial rectangular ground plane is presented. Fractal geometry technique is used in order to take advantage of its self-similar property which lead to attain not only size miniaturization but also wider bandwidth and iteration method is utilized that reach up to third iteration. The proposed model is simulated by High Frequency Structural Simulator (HFSS) package. Such model is designed on FR4 substrate with a compact size of (20×18×1.5) mm3, 4.3 permittivity and 0.02 loss tangent. The microstrip line feed is used to feed this antenna with a length …

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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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The Influence Of Punch Profile Radius On Deep Drawing Process In Case Of A Low Carbon Steel Cylindrical Cup, Waleed Jawad, Abdullah Jaafar Aug 2026

The Influence Of Punch Profile Radius On Deep Drawing Process In Case Of A Low Carbon Steel Cylindrical Cup, Waleed Jawad, Abdullah Jaafar

Engineering and Technology Journal

This research aims to investigate the effect of punch profile radius on the drawing force, cup wall thickness, amount of spring back induced in the drawn cup, contact regions between blank and punch, strain distributions over the cup wall and height of drawn cup, in deep drawing operation. In this study, a commercial FEA software package (ANSYS11.0) was employed to model a deep drawing operation. A 3-D model of cylindrical cup of (53.4 mm) outer diameter and (33mm) height from a low carbon steel (1008–AISI) of (0.7mm) sheet thickness has been developed and then the FE simulations results are compared …

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Effect Of High Temperature On Mechanical Properties Of Rubberized Concrete Using Recycled Tire Rubber As Fine Aggregate Replacement, Wrya Abdullah, Mohamed Abdulkadir, Muhammad Muhammad Aug 2026

Effect Of High Temperature On Mechanical Properties Of Rubberized Concrete Using Recycled Tire Rubber As Fine Aggregate Replacement, Wrya Abdullah, Mohamed Abdulkadir, Muhammad Muhammad

Engineering and Technology Journal

Effects of various elevated heating temperatures on mechanical properties of normal concrete containing recycled tire rubber as a fine aggregate (RTRFA) has been investigated in this paper. Five different concrete mixes were prepared in the laboratory. In each mix Ordinary Portland Cement, natural coarse and fine aggregate, water and RTRFA are used with fine aggregate replacement ratios (0%, 6%, 12%, 18% and 24%) by weight. In the laboratory, 60 cylindrical specimens (100mm diameter × 200mm high) and 60 cubic specimens (150×150×150mm3) were prepared. The concrete specimens were exposed to four different heating temperatures: Control (Not heated), 200, 400, and 600°C, …

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Intelligent Modeling Of Metal Oxide Gas Sensor, Omar Lutfy, Alaa Abdul-Hamead Aug 2026

Intelligent Modeling Of Metal Oxide Gas Sensor, Omar Lutfy, Alaa Abdul-Hamead

Engineering and Technology Journal

Due to the complexity of the gas detection process, traditional modeling techniques cannot provide accurate modeling performance to reproduce the behavior of this difficult process. In this paper, an intelligent modeling technique is utilized to develop an accurate model to represent the complex and nonlinear gas detection process. In particular, in this study nickel Oxide NiO gas sensor, which was specifically fabricated by a simple chemical spray pyrolysis technique. In the process, the nickel chloride hexahydrate salt was used at a concentration of (0.05 M) and a temperature of 350 ºC. Because of this process, the thickness of NiO was …

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