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Comparative Assessment Of Uav-Based Tseb And Field-Calibrated Aquacrop For Evapotranspiration On The Arid Coast Of Peru, Roxana Peña-Amaro, José Huanuqueño-Murillo, Lia Ramos-Fernández, Abel Ramos-Ayala, David Quispe-Tito, Lena Cruz-Villacorta, Elizabeth Heros-Aguilar, Edwin Pino-Vargas, Alfonso Torres-Rua Mar 2026

Comparative Assessment Of Uav-Based Tseb And Field-Calibrated Aquacrop For Evapotranspiration On The Arid Coast Of Peru, Roxana Peña-Amaro, José Huanuqueño-Murillo, Lia Ramos-Fernández, Abel Ramos-Ayala, David Quispe-Tito, Lena Cruz-Villacorta, Elizabeth Heros-Aguilar, Edwin Pino-Vargas, Alfonso Torres-Rua

Civil and Environmental Engineering Faculty Publications

Precise estimation of evapotranspiration (ET) is essential for sustainable water management in arid agroecosystems, particularly for high-water-demand crops such as rice. This study integrated very-high-resolution UAV thermal–multispectral imagery with a Two-Source Energy Balance model (UAV–TSEB) and a field-calibrated AquaCrop model to quantify daily ET and its components under continuous flooding on the arid Peruvian coast during the 2024–2025 season. A network of 24 drainage lysimeters provided an independent observational benchmark (ETlys); to represent the treatment-level response, lysimeter observations were aggregated as the mean across the 24 units for each UAV campaign. Thirteen UAV surveys supplied radiometric surface temperature …

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Predicting Tart Cherry Stem Water Potential Using Uav Multispectral Imagery And Environmental Data Via Symbolic Regression, Anderson L. S. Safre, Alfonso Torres-Rua, Kurt Wedegaertner, Brent Black, Brennan Bean, Burdette Barker, Matt Yost Mar 2026

Predicting Tart Cherry Stem Water Potential Using Uav Multispectral Imagery And Environmental Data Via Symbolic Regression, Anderson L. S. Safre, Alfonso Torres-Rua, Kurt Wedegaertner, Brent Black, Brennan Bean, Burdette Barker, Matt Yost

Civil and Environmental Engineering Faculty Publications

Tart cherry is an important fruit crop in Utah, where irrigation is essential due to arid conditions. Precision irrigation requires reliable indicators of plant water status, and stem water potential (Ψstem), is among the most sensitive though labor-intensive and spatially limited. This study develops Ψstem estimation models using high-resolution multispectral Unmanned Aerial Vehicle (UAV) imagery combined with meteorological and soil moisture data, applying Symbolic Regression (SR). Results show a stronger correlation between optical bands and Ψstem during the pre-harvest period. Among 85 vegetation indices, the Red Chromatic Coordinate (RCC) index performed best (R2 = 0.67). …

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Self-Efficacy Traits Of First Year Corequisite Math Students: A Phenomenological Study, Johnny Reed Fleming Mar 2026

Self-Efficacy Traits Of First Year Corequisite Math Students: A Phenomenological Study, Johnny Reed Fleming

Doctoral Dissertations and Projects

The purpose of this phenomenological study was to understand better the self-efficacy traits of first-year corequisite mathematics students at a regional, private, liberal arts university located in central Appalachia. The theory guiding this study is Bandura’s social cognitive theory as it pertains to participants’ beliefs in their ability to succeed in a college-level mathematics course and their perceived self-efficacy and reciprocal determinism regarding that success. The research questions in this study were designed to examine the perceived self-efficacy, factors of reciprocal determinism, and attitudes of students who experienced success in a credit-bearing mathematics course in college while subsequently enrolled in …

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A Quantitative Causal-Comparative Study Of The Effect Of Dynamic Versus Static Visualization And Gender On Middle School Teachers' Mathematics Anxiety, Daniel Kobina Lindsay Mar 2026

A Quantitative Causal-Comparative Study Of The Effect Of Dynamic Versus Static Visualization And Gender On Middle School Teachers' Mathematics Anxiety, Daniel Kobina Lindsay

Doctoral Dissertations and Projects

The purpose of this quantitative causal-comparative study was to determine if there is a significant difference in teachers' mathematics anxiety on the effect of instruction-based dynamic versus static visualization and gender among teachers in middle schools. This study is critical because it addresses policies and pedagogical practices that address mathematics anxiety among middle school teachers. The gender of teachers and the medium of instructional delivery play a crucial role in assessing these teachers' engagement and achievement in the United States educational system. The sample (n = 293) was composed of teachers, divided into groups based on their instruction method and …

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Understanding The Lived Experiences Of Black Male Students’ Use Of Integrated Educational Technologies In Stem Fields At Predominately White Institutions: A Phenomenological Study, Devon Morgan Mar 2026

Understanding The Lived Experiences Of Black Male Students’ Use Of Integrated Educational Technologies In Stem Fields At Predominately White Institutions: A Phenomenological Study, Devon Morgan

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological study is to understand the lived experiences of Black male students' use of integrated educational technologies in STEM fields at predominately White institutions of higher education in East Tennessee. The theory guiding this study is Piaget's (1950) theory on constructivism, as it is the framework through which active learning, prior knowledge, and social influences shape students' learning. The central research question addressed in the study is how Black male students experience the use of integrated educational technologies in STEM fields at PWIs of higher education in East Tennessee. The transcendental phenomenological approach is used …

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Examining The Effect Of Enhanced Retrieval Practice With Or Without Artificial Intelligence On Task Value And Self-Efficacy Of College Students: A Quasi-Experimental Study, Duane N. Stutzman Mar 2026

Examining The Effect Of Enhanced Retrieval Practice With Or Without Artificial Intelligence On Task Value And Self-Efficacy Of College Students: A Quasi-Experimental Study, Duane N. Stutzman

Doctoral Dissertations and Projects

The purpose of this quantitative quasi-experimental study was to determine if a significant difference exists in college students perceived task value and self-efficacy when using different forms of retrieval practice enhanced with or without artificial intelligence. This study is important because task value and self-efficacy may have an impact on student motivation and engagement; therefore, the study adds to the literature demonstrating that retrieval practice can help improve active, rather than passive learning. The sample was composed of 140 undergraduate students enrolled in a hybrid health science course at a large university in the Midwest. After participants completed their assigned …

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A Quantitative Quasi-Experimental Study To Determine The Effectiveness Of Ufli And Iready Interventions For Third Grade Struggling Readers, Vada Kehrer Mar 2026

A Quantitative Quasi-Experimental Study To Determine The Effectiveness Of Ufli And Iready Interventions For Third Grade Struggling Readers, Vada Kehrer

Doctoral Dissertations and Projects

The purpose of this quantitative quasi-experimental pretest-posttest study was to determine whether there is a significant difference in the growth in reading proficiency among third-grade struggling readers receiving different reading intervention programs: the University of Florida Literacy Institute (UFLI) or i-Ready curriculum-based interventions. The study is important because the National Assessment of Educational Progress (NAEP) has reported a concerning decline in literacy rates, particularly among students with dyslexia. The persistence of decline in reading proficiency stresses the urgent need for effective reading interventions. This study contributes to the existing literature on reading intervention programs for struggling readers. The sample included …

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Exploring Factors Influencing Autistic Children And Young People’S Access To Dental Care In Southwest England: A Qualitative Study Of Children, Parents, And Dental Professionals, Jo Erwin, Sarah Neill, Tara Vassallo, Robert Witton, Louise Peters, Isaac Vassallo, Abigail Nelder, Martha Paisi Mar 2026

Exploring Factors Influencing Autistic Children And Young People’S Access To Dental Care In Southwest England: A Qualitative Study Of Children, Parents, And Dental Professionals, Jo Erwin, Sarah Neill, Tara Vassallo, Robert Witton, Louise Peters, Isaac Vassallo, Abigail Nelder, Martha Paisi

Peninsula Dental School

Background: Autistic children and young people (CYP) experience inequalities in oral health. They are at higher risk of dental caries and periodontal disease and are more likely to have teeth extracted under general anaesthetic than their non-autistic peers. Poor oral health among autistic CYP results from multiple factors, including sensory sensitivities, communication differences, and difficulties accessing appropriate dental care. This qualitative study explored factors influencing autistic CYP’s access to dental care from the perspective of CYP, parents/carers, and dental health professionals (DHPs). Methods: A qualitative design using semi-structured interviews was adopted. Purposive sampling was used to recruit autistic CYP, parents/carers, …

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Monthly Progress Report Butte Priority Soils Operable Unit Consent Decree Partial Remedial Design/Remedial Action And Operation And Maintenance, Josh Bryson Mar 2026

Monthly Progress Report Butte Priority Soils Operable Unit Consent Decree Partial Remedial Design/Remedial Action And Operation And Maintenance, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

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A Transcendental Phenomenological Study Of Cognitive Overload In Manufacturing Engineers During Online Training In An Industrial Environment, Sarah J. May Mar 2026

A Transcendental Phenomenological Study Of Cognitive Overload In Manufacturing Engineers During Online Training In An Industrial Environment, Sarah J. May

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological study was to explore experiences of cognitive overload among engineers in manufacturing during digital training in industrial environments. Engineers in manufacturing manage substantial physical and cognitive demands in order to maintain safe and efficient industrial environments. In addition to these responsibilities, engineers are often expected to engage in digital training within active work settings, frequently without physical or cognitive separation from job-related tasks. A qualitative research design was employed, with data collected from 10 participants and analyzed through triangulation and thematic coding. Data collection methods included a qualitative questionnaire, individual interviews, and a letter-writing …

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The Exploration Of Parental Involvement On Student Academic Achievement From The Perspective Of The Educator: A Phenomenological Study, Kwame Vladamir Hennagan Mar 2026

The Exploration Of Parental Involvement On Student Academic Achievement From The Perspective Of The Educator: A Phenomenological Study, Kwame Vladamir Hennagan

Doctoral Dissertations and Projects

The purpose of this phenomenological study was to explore the lived experiences of educators regarding parental involvement in a rural South Carolina school district. Guided by Vygotsky's Sociocultural Theory and Epstein's Parental Involvement Theory frameworks, the study examined how teachers perceive, promote, and experience parental engagement, and what barriers influence effective collaboration between school and home. The Central Research Question answered in the study is: What are the lived experiences of educators with students with low parental involvement at a local school district in South Carolina? The methodology of this manuscript begins with the phenomenological research design.The sample size included …

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A Qualitative Case Study Of Teachers’ Responses And Adaptation To How They Transitioned From Traditional Classrooms To Partial Or Full Virtual Learning Environments Post Covid-19, Kaprice L. Smith Mar 2026

A Qualitative Case Study Of Teachers’ Responses And Adaptation To How They Transitioned From Traditional Classrooms To Partial Or Full Virtual Learning Environments Post Covid-19, Kaprice L. Smith

Doctoral Dissertations and Projects

The purpose of this qualitative case study was to understand the responses and adaptation process for public school teachers in a southern state that transitioned from traditional classrooms to full or partial online learning environments post-COVID-19. The theory that guided this study was the Theory of Adaptation of Educators Teaching Technology-Based Courses, which theorizes that educators experience phases of transformation visioning, learning, rationalizing and doing, and modernizing that foster resilience and adaptability within evolving educational landscapes (Pinatil & Ramos, 2023). Guided by the social constructivist paradigm, the study examined how teachers adjusted instructional strategies, demonstrated emotional resilience, and integrated technology …

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The Psychometric Use Of Word Embeddings, Thomas Benjamin Lyle Wasden Mar 2026

The Psychometric Use Of Word Embeddings, Thomas Benjamin Lyle Wasden

Doctoral Dissertations and Projects

This quantitative study examined the feasibility of categorizing individuals by English-language competency using word embeddings derived from language samples obtained from these individuals and by viewing word embeddings as a psycholinguistic construct. Word embeddings have been shown to be a versatile tool for performing a large number of important natural language processing (NLP) tasks, as well as a plausible model for some processes in the human mind, including processes within the domain of psycholinguistics. This research seeks to build upon previous research by showing that word embeddings may shed light on the underlying neural representation of semantic entities being acquired …

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Predicting Income Satisfaction From Artists’ Annual Income And Collegiate Embedded Entrepreneurial Knowledge And Skills, Joy Albert Quarmout Mar 2026

Predicting Income Satisfaction From Artists’ Annual Income And Collegiate Embedded Entrepreneurial Knowledge And Skills, Joy Albert Quarmout

Doctoral Dissertations and Projects

The purpose of this quantitative, predictive correlational study was to determine how accurately income satisfaction could be predicted from a linear combination of annual income and inclusion of entrepreneurial knowledge and skills curricula in liberal arts education programs among public college graduates within the past ten years. A purposive sample of 87 graduates was drawn from universities with established art programs who graduated one to ten years ago. The planned behavior theory formed the logic model that guided the thought process, attitude, and reasoning behind this study. The research instrument, The Strategic National Arts Alumni Project: Survey Questionnaire, served as …

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Teachers' Lived Experiences Addressing The Benefits And Challenges Of Screen Based Technology Use In The Classroom: A Transcendental Phenomenological Study, Amanda M. Thompson Mar 2026

Teachers' Lived Experiences Addressing The Benefits And Challenges Of Screen Based Technology Use In The Classroom: A Transcendental Phenomenological Study, Amanda M. Thompson

Doctoral Dissertations and Projects

The researcher explored Title I elementary school teachers’ lived experiences in addressing the challenges and benefits of screen based technology (SBT) use in classroom spaces. Guided by Vygotsky’s (1978) sociocultural learning theory, a transcendental phenomenological approach was utilized by the researcher to explore the unique nuances of different learning spaces, buildings, and educational contexts. As SBT has become indispensable to modern education practitioners, teachers must balance the benefits to student learning with screen fatigue, reduced interpersonal interaction, and access disparities. The central research question states: How do Title I elementary school teachers describe their lived experiences in addressing SBT use …

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Structures, Strategies, And Skills For Effective Math Intervention, Sean Dean, Patty Witkowsky, Jessica Contreras, Michelle Kephart Mar 2026

Structures, Strategies, And Skills For Effective Math Intervention, Sean Dean, Patty Witkowsky, Jessica Contreras, Michelle Kephart

Journal of Academic Underperformance

Many factors influence students’ readiness for college math, and some students enter college unprepared for the demands of their math courses. Effective placement strategies and robust support systems are essential for student success and degree completion. This qualitative narrative case study explores the experiences of college students working with a Math Learning Strategies Specialist (MLSS) and the specific strategies taught by the MLSS. Through one-on-one interviews, three key themes emerged: learning structures, strategies, and interpersonal skills. The MLSS contributed to participants' experiences by providing structured yet flexible support, tailored learning strategies, and a positive interpersonal environment. These combined elements enabled …

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Redesigning Online Graduate Orientation To Foster Academic Resilience And Prevent Underperformance, Stella Michael-Makri, David E. Rodriguez Mar 2026

Redesigning Online Graduate Orientation To Foster Academic Resilience And Prevent Underperformance, Stella Michael-Makri, David E. Rodriguez

Journal of Academic Underperformance

Graduate students in fully online programs often begin their academic journey without adequate preparation for the emotional, structural, and cultural challenges of graduate-level work. For students who are first-generation, racially marginalized, international, or returning to education after time away, this lack of scaffolding can lead to early disengagement, underperformance, or attrition. Orientation, often treated as a checklist of logistical tasks, represents a missed opportunity for meaningful academic intervention. This manuscript proposes a five-module conceptual model for online graduate orientation designed to proactively support online graduate students in the domains of emotional regulation and academic identity, time management and executive functioning, …

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Flow Modulation On Hydraulic River Behavior Between Al-Abbassia And Al-Shammia Barrages Using Hec-Ras2d, Zainab Abbass, Jaafar Maatooq, Mustafa Al-Mukhtar Mar 2026

Flow Modulation On Hydraulic River Behavior Between Al-Abbassia And Al-Shammia Barrages Using Hec-Ras2d, Zainab Abbass, Jaafar Maatooq, Mustafa Al-Mukhtar

Engineering and Technology Journal

The construction of hydraulic structures worldwide results in controlled hydrologic regimes through river impoundment. The studied area exhibits a fluctuation in climatic change and flow regulation by hydraulic structures, resulting in variations in flow patterns. This study investigates the variations in the water flow of the Euphrates River in the vicinity of Abbassia Barrage. Three flow scenarios, maximum flow 44.26 m3/s, average flow 28.69 m3/s, and minimum flow 19.67 m3/s for one year, were processed in HECRAS2D software and analyzed to view the impact of flow modulation on hydraulic river behavior between Al-Abbassia and Al-Shammia Barrages. The findings indicate that …

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Enhancement Of Mechanical Properties In Unsaturated Polyester Via Reinforcement With Olive Leaf Particles, Eman Ibraheem, Waleed Bdaiwi Mar 2026

Enhancement Of Mechanical Properties In Unsaturated Polyester Via Reinforcement With Olive Leaf Particles, Eman Ibraheem, Waleed Bdaiwi

Engineering and Technology Journal

The use of olive leaf powder (OLP) as a filler material in unsaturated polyester composites brings a new avenue for the development of mechanical and thermal properties. The present work focuses on the impact of the relative proportions of OLP ranging from (0, 5, 10, 15, 20, and 25%) on the structural, electrical, and thermal properties of the composites.The specimens were prepared through the hand lay molding process, and the hardness strength, impact strength as well as compressive strength examination were conducted.These findings suggest that the characteristics of these composites improve as the content of OLP increases.The maximum impact strength …

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Synthesis And Characterization Of Nickel Doped Ternary Oxide Thin Film As Electrode Materials For Supercapacitor Application, Cissan Sylvanus, Jemima Ogwo, Sylvanus Isaac Mar 2026

Synthesis And Characterization Of Nickel Doped Ternary Oxide Thin Film As Electrode Materials For Supercapacitor Application, Cissan Sylvanus, Jemima Ogwo, Sylvanus Isaac

Engineering and Technology Journal

The over-dependence on fossil fuels for energy generation, especially in developing countries like Nigeria, is a major setback to the economy. There is a hike in its price, hence the need to commercialize a renewable form of energy such as solar energy. Solar energy's intermittent nature is a barrier, requiring an efficient, affordable, clean energy storage mechanism such as a supercapacitor. Electrodes are a supercapacitor's basic components, and optimizing an electrode material leads to wide electrochemical applications. In this study, Ni-doped  thin films were synthesized by electrochemical deposition, and the optical, morphological, and electrochemical properties were investigated through different characterization …

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Optimal Operational Conditions Of Pla/Pbat Mixed Matrix Membrane For The Treatment Of Oily Wastewater, Maryam Ghadhban, Khalid Rashid, Adnan Abdulrazak, Hicham Meskher, Yacine Benguerba, Emad Yousif Al-Sarraj, Qusay Alsalhy Mar 2026

Optimal Operational Conditions Of Pla/Pbat Mixed Matrix Membrane For The Treatment Of Oily Wastewater, Maryam Ghadhban, Khalid Rashid, Adnan Abdulrazak, Hicham Meskher, Yacine Benguerba, Emad Yousif Al-Sarraj, Qusay Alsalhy

Engineering and Technology Journal

This study aims to optimize the operational variables influencing the incorporation of Hesperidin nanoparticles (HSP NPs) into poly(lactic acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) for manufacturing mixed matrix membranes (MMMs) for oily wastewater treatment. An optimization method was employed to determine the optimal values for key process factors to achieve specific flux and rejection rates exceeding required levels. Statistical techniques such as response surface methodology (RSM) and analysis of variance (ANOVA) were used to enhance performance on a larger scale. This research investigated the impact of operating parameters on the flux and oil rejection of PLA/PBAT/HSP membranes across all samples. The variables studied …

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Applications Of Artificial Intelligence In Nanotechnology, Shahad Eabd Alrida, Ola Obed, Elaf Taha, Thamer Abdullah, Mustafa Hathal, Viola Somogyi Mar 2026

Applications Of Artificial Intelligence In Nanotechnology, Shahad Eabd Alrida, Ola Obed, Elaf Taha, Thamer Abdullah, Mustafa Hathal, Viola Somogyi

Engineering and Technology Journal

Artificial intelligence (AI) is emerging as a prominent technological advancement. It is the act of replicating human intelligence for many purposes. In contrast to conventional methodologies, artificial intelligence (AI) is undergoing tremendous advancements. The present state of artificial intelligence (AI) technology enables them to effectively address numerous intricate difficulties with proficiency comparable to a human's. The significance of advancements in AI is particularly evident in machine learning, where the techniques and algorithms are effectively applied to address many problems, including those in nanotechnology. In contemporary nanotechnology, it is crucial to expedite the search for the most favorable synthesis parameters while …

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Control System Design Of A Pin-On-Disc Wear Machine Using Plc, Huda Mohammed, Khansaa Salman Abed, Ahmed Reja Mar 2026

Control System Design Of A Pin-On-Disc Wear Machine Using Plc, Huda Mohammed, Khansaa Salman Abed, Ahmed Reja

Engineering and Technology Journal

This study presents the design and implementation of a control system for a Pin-on-Disc wear testing machine using a Programmable Logic Controller (PLC). The novel approach employed involves adjusting the applied pressure on the pin, rather than the conventional method of altering weights, to evaluate the impact of varying loads on the wear rate. This method enhanced the accuracy of wear results by 25% compared to traditional techniques. The control system was developed and implemented with a Human-Machine Interface (HMI) that interacts with the PLC to control and monitor key parameters, including applied load, temperature, rotational speed, sliding time, and …

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Modeling And Control Of A High-Quality Electro-Hydraulic Actuator Driven Via An Induction Motor Under Intelligent Indirect Vector Control, Aws Hassan, Jamal Mohammed, Walaa Hashim Mar 2026

Modeling And Control Of A High-Quality Electro-Hydraulic Actuator Driven Via An Induction Motor Under Intelligent Indirect Vector Control, Aws Hassan, Jamal Mohammed, Walaa Hashim

Engineering and Technology Journal

Due to its excellent energy efficiency and broad speed range, the variable-speed electro-hydraulic drive is an appealing driving principle in many contemporary industrial applications. A primary control of linear motion is via a variable-speed electric motor driving a hydraulic actuator via a constant displacement pump. One of the most commonly used controllers for the speed control of induction motors is the Proportional Integral (PI) type. However, the traditional PI controller has some disadvantages, such as the high starting overshoot, sensitivity to controller gains, and sluggish response due to sudden disturbance. An intelligent controller based on PI Fuzzy logic set theory …

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Anfis Control Of Four-Quadrant Dc/Dc Chopper For Wireless Ev Charging, Hawraa Hameed, Hosham Anead, Khalid Sultan Mar 2026

Anfis Control Of Four-Quadrant Dc/Dc Chopper For Wireless Ev Charging, Hawraa Hameed, Hosham Anead, Khalid Sultan

Engineering and Technology Journal

Wireless charging of electric vehicles (EVs) poses issues like power ripples that reduce battery lifetime. This study proposes a four-quadrant DC/DC chopper controlled by an adaptive neuro-fuzzy controller (ANFIS) for wireless EV charging. The system is modeled and simulated in Matlab/Simulink. Compared to a PI-PSO controller, the proposed ANFIS control reduced the ripple factor in power over half to about 0.7% and optimized stability and efficiency. Though settling time increased, the difference in rise time was negligible. Future work will improve dynamic response. The ANFIS-controlled DC/DC chopper enhances wireless charging performance with minimal power ripples for safe, efficient EV power …

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Survey Of Near-Field Wireless Communication And Power Transfer For Biomedical Implants, Hala Abduljaleel, Saad Mutashar, Sadik Gharghan Mar 2026

Survey Of Near-Field Wireless Communication And Power Transfer For Biomedical Implants, Hala Abduljaleel, Saad Mutashar, Sadik Gharghan

Engineering and Technology Journal

Bio-implanted medical devices with electronic components play a crucial role due to their effectiveness in monitoring and diagnosing diseases, enhancing patient comfort, and ensuring safety. Recently, significant efforts have been conducted to develop implantable and wireless telemetric biomedical systems. Topics such as appropriate near-field wireless communication design, power use, monitoring devices, high power transfer efficiency from external to internal parts (implanted), high communication rates, and the need for low energy consumption all significantly influence the advancement of implantable systems. In this survey, a comprehensive examination is undertaken on diverse subjects associated with near-field wireless power transfer (WPT)-based biomedical applications. The …

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Effect Of The Material Properties Of The Rotor-Disc On The Performance Of Eddy Current Braking Systems, Ahmed Salman, Jamal Mohammed, Farag Mohammed Mar 2026

Effect Of The Material Properties Of The Rotor-Disc On The Performance Of Eddy Current Braking Systems, Ahmed Salman, Jamal Mohammed, Farag Mohammed

Engineering and Technology Journal

Failure of traditional brakes occurs due to raised temperatures and the formation of structural fractures caused by wear and strain. For resolving mechanical brake problems, consider employing contactless braking technology, also known as eddy current braking, which offers a smoother deceleration. This research aims to assess the suitability of multi-materials for designing brake discs (ECBs) for use in automobiles. The choice of material for the rotor disc is crucial in the design of eddy current brakes. Different material factors impact the performance of these brakes. Therefore, there is a need for a material that possesses superior mechanical properties, high electrical …

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A Comprehensive Review Of The Hybrid Heating Systems Consisting Of Heat Pumps And Solar Collectors For Hot Water And Space Heating Application, Ghazwan Mohammed, Ahmed Saleh, Abdul Hadi Khalifa Mar 2026

A Comprehensive Review Of The Hybrid Heating Systems Consisting Of Heat Pumps And Solar Collectors For Hot Water And Space Heating Application, Ghazwan Mohammed, Ahmed Saleh, Abdul Hadi Khalifa

Engineering and Technology Journal

A solar-assisted heat pump system is a hybrid system that integrates a solar collector and a heat pump, serving diverse functions such as space conditioning, drying, and generating heated water. The system's classification is based on the connection configuration of the solar collector and heat pump, which may involve a serial, parallel, or dual arrangement. Solar-assisted heat pump systems enhance output efficiency by harnessing solar energy in various heating modes, with the effectiveness contingent on the prevailing environmental conditions. As stated above, these systems are essential in lowering power consumption and reducing emissions. This study comprehensively assesses the research and …

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Parametric Analysis For Performance And Emissions Of Gasoline Direct Injection Engine Using Mathematical Modelling, Omar Yousif, Mahmoud Mashkour Mar 2026

Parametric Analysis For Performance And Emissions Of Gasoline Direct Injection Engine Using Mathematical Modelling, Omar Yousif, Mahmoud Mashkour

Engineering and Technology Journal

The study aims to estimate the performance and emissions of a gasoline direct injection (GDI) engine by analyzing parameters such as engine speed between 2000 and 6000 rpm, compression ratio (CR) between 9 and 13, and the start of ignition between 140 and 180 deg. A thermodynamic mathematical model was developed using MATLAB to simulate the two-zone combustion process of a four-cylinder, four-stroke direct injection engine operating on gasoline at specified parameters. The results showed that parameter variations greatly affect the performance and emissions of the GDI engine. The highest values of in-cylinder pressure, burned and unburned temperature, cumulative engine …

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Modeling And Analysis Of Thermoelectric Atmospheric Water Generation In The Economic City Of Iraq, Ammar Al-Tajer, Wissam Alawee, Hayder Dhahad, Zakaria Omara Mar 2026

Modeling And Analysis Of Thermoelectric Atmospheric Water Generation In The Economic City Of Iraq, Ammar Al-Tajer, Wissam Alawee, Hayder Dhahad, Zakaria Omara

Engineering and Technology Journal

Atmospheric Water Generation assumes substantial significance as an innovative remedy for addressing water scarcity and augmenting water resilience. This technology facilitates water extraction directly from the atmosphere, presenting a sustainable and decentralized approach to water supply. The investigation into the feasibility of attaining the dew point temperature for a heatsink operating in the climatic conditions of Basra was conducted using Fluent 22.1 software. The minimum dew point temperature under extreme conditions was determined to be 10.52℃. A thermoelectric device was a primary component in cooling the moisture-laden air to produce water from atmospheric air. Simulations were executed using two complementary …

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