Engineering Commons^™

Challenges Of New And Renewable Energy In The Face Of Climate Change: An Introduction To Evaluating The Egyptian Experience, نهي أحمد عبد المنعم السيد, شاهيناز محمد علي طايع Dr, Nevine Gado Dr.

Journal of Engineering Research

أصبحت التغيرات المناخية وما يترتب عليها من المخاطر البيئية قضية من القضايا الحيوية والتي عقدت لها عدة مؤتمرات دولية مثل مؤتمر المناخ العالمي COP 27 والذي استضافته مصر في عام 2023 لوضع الحلول لتلك الأزمة. ومن أجل ذلك أصبح مردود الطاقة الجديدة والمتجددة احدى اليات وادوات التعامل مع هذه القضية الحيوية كبديل مستدام وصديق للبيئة.

The Impact Of Digital Twin On Real Estate Marketing, نوران عاطف محمد غانم Eng, مروة أحمد قمر الدولة أ.د أحمد عبد الوهاب أحمد رزق

Journal of Engineering Research

يتناول هذا البحث أولا الدراسات النظرية الأكثر حداثة التي تناولت تقنية التوأمة الرقمية وعلاقتها بالعقارات وتسويقها ونشأتها ومفهومها ومكوناتها، ثم انتقلنا الي الدراسات المخصصة لاستخداماتها في قطاع العقارات وأهميتها، ومن بعد تناولنا استخدامتها في التسويق العقاري بصفة خاصة من حيث المشاريع والبرامج. ومن ثم وضحنا أهمية تقنية التوأمة وتأثيرها علي التسويق العقاري من حيث العملاء والشركات والأسواق، وبعد ذلك تناولنا تطبيق للتسويق العقاري باستخدام تقنية التوأمة الرقمية علي التخطيط العمراني وكيفية تأثيره علي تسويق المشروع. ومن خلال القيام بدراسة استبيان لقياس أهمية تأثير تقنية التوأمة الرقمية علي أراء العملاء وتفضيلاتهم في اتخاذ القرارات واختيارهم للشركات حين ذاك، وربط تقنية التوأمة …

Sensory Garden Preferences For Autism Spectrum: Insights From Psychologists And Urban Designers, Maram Adel Ebaid

Journal of Engineering Research

Sensory gardens are outdoor environment that stimulate the senses and promote well-being for people with autism spectrum disorder (ASD). In Egypt, there is an absence of gardens, compounded by a limited understanding of the design principles aligned with the needs of people with ASD. The research explores sensory garden features and the specific challenges faced by people with ASD. To bridge this gap, the methodology depends on qualitative approach through interviews with psychology and urban design experts. The results highlight the correlation between prevalent strategies among people with ASD and the elements of sensory gardens, considering both soft and hard …

Incorporation Of Bim Techniques In The Architectural Engineering Curriculum, Ahmed Ahmed M. Saleh, Sherif S. Abdalla

Journal of Engineering Research

In this era, the age of the digital revolution, Egyptian engineering universities and academies compete by integrating new technologies such as building information modeling (BIM) inside the educational curriculum. The research aims to examine and integrate BIM techniques within the course specifications in Egyptian universities and academies, majoring in architectural engineering pathing through the four levels of credit hours system so that, teaching the BIM courses is not limited to one or two only. Furthermore, the current situation of BIM maturity levels, dimensions, and tools implementation in some architecture universities and academies curriculum will be determined and monitored. As a …

Operating Efficiency In Accommodation Units And Its Impact On The Design Of Comprehensive Single Patient Rooms In Hospitals, نهال نبيل محمد مصطفي ، احمد هلال محمد محمد ، نادي مصطفي عبد الكريم

Journal of Engineering Research

هناك الكثير من التحديات التشغيلية والتنظيمية التي تواجهها المجموعات المهنية المختلفة داخل وحدات الإقامة في المستشفيات بسبب عدم كفاية معايير التصميم الموضوعة بالاحتياجات المطلوبة خاصة بغرف المرضي، ومن اهم التحديات التي يواجهها الاطباء وفرق التمريض والفنيين وغيرهم. القدرة السلسة على دخول غرفة المريض والتفاعل مع عناصر الغرفة بشكل واضح دون حدوث تصادمات او احتكاكات، كذلك القدرة علي القيام بالأعمال التحضيرية المتعلقة بالأنشطة التمريضية المطلوبة داخل غرف المرضي وتشمل كافة الأنشطة التي يقوم بها الشخص المهني سواء اكان طبيب ام تمريض ام فني منذ لحظة دخوله غرفة المريض وحتي اداءه المهمة المطلوبة. ويجب ان تتم هذه المهام بشكل مريح وباستجابة سريعة …

Cyber Resilience, Risk Management, And Security Challenges In Enterprise-Scale Cloud Systems: Comprehensive Review, Abdiaziz Abdi, Hajar Bennouri, Anthony Keane

Conference Papers

The cyberthreat landscape is constantly evolving with the rapid development of cloud computing. Today, businesses and consumers rely heavily on cloud infrastructure, which provides high availability and resilient systems. However, cloud and IoT platforms contain vulnerabilities that can compromise data confidentiality, integrity, and availability, leading to disruptions in service operations. These significant challenges pose serious threats such as vulnerabilities, misconfigurations, data breaches, faulty hardware, and application failures with high costs. IBM reports that the average cost of a data breach worldwide is approximately US$4.5 million per incident. This highlights the need for adequately designed resilience systems with high availability and …

Hybrid Mechanism Of Electrical Breakdown In Ferroelectric Materials Under High-Pressure Shock Loading, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Jay B. Chase, Christopher S. Lynch

Mining Engineering Faculty Research & Creative Works

The unique ability of ferroelectrics to generate high voltage under shock loading is limited by electrical breakdown within the shock-compressed ferroelectric material. Breakdown is a hybrid process of initiation and growth. The possible mechanisms of electrical breakdown in ferroelectric films and bulk ceramics subjected to high-pressure shock loading are discussed and experiments designed to elucidate which mechanisms govern breakdown. Gigapascal shock loading experiments were performed on poled Pb_0.99(Zr_0.95Ti_0.05)_0.98Nb_0.02O₃ ferroelectric film specimens in the range of 32-156 μm thickness to determine the dependence of the breakdown field on thickness and …

Disturbance-Rejection Control For Unbalanced Operation Of Microgrids: Invariant-Set Approach, Ehab Bayoumi

Mechanical Engineering

In microgrids, voltage imbalance control is crucial to preserving the required level of power quality. The article presents a tracker design that mitigates the unbalance in the microgrids. The proposed microgrid model includes positive and negative sequences, whereby the positive sequences are controlled, and the negative sequence is treated as an external disturbance (whose effect must be attenuated). The uncertainty in the external disturbance is modelled in the norm-bounded form. The suggested control is based on attracting (driving) the state trajectory into a small region, including the origin (attracting ellipsoid-set). The effect of the negative sequence components is attenuated by …

A Stable Isotope Study To Investigate Water Movement In The Los Lagos Region Of Southern Chile, Kritan Subedi

Civil Engineering ETDs

The Los Lagos region in southern Chile, located in northwest Patagonia, features rain-fed agricultural lands, glacial lakes, forests, farmlands, and volcanic soils. This study investigates water movement within a micro-basin using stable isotope analysis and hydrological modeling over eight weeks. It aims to develop a conceptual model of water movement by elucidating interactions between precipitation, soil water, and streamflow. Findings highlight the critical role of deeper soil layers in sustaining streamflow during dry spells and indicate that soil acts as a buffer, maintaining hydrological continuity despite variable precipitation. Improved understanding of these dynamics can inform watershed management and water resource …

Engineered Cementitious Composites: The Good, The Bad, And The Possibilities, Michele M. Anderson, Michele M. Anderson

Civil Engineering ETDs

Construction materials require testing in the laboratory and field to be accepted as viable tools. Engineered cementitious composites (ECC) are a new material in the class of ultra-high-performance concrete studied and tested in the lab but not in the field. This research aimed to answer questions about ECC's ability to be a viable and cost-efficient construction material. The cost of ECC continues to be a factor in the acceptance of the material. Cost savings in construction and labor have not been identified until now, and it is good. Field condition testing of ECC in a desert climate known for extreme …

Finite Element Analysis And Optimization Of The Rotational Stiffness Of Semi-Rigid Base Connection Under Simultaneous Moment And Tension, Mahmoud T. Nawar, Ayman El-Zohairy, Ahmed G. Alaaser, Osman Hamdy

Faculty Publications

The base connection is flexible, not fully pinned/fixed, implying a nonlinear moment rotation relationship. This deviates from a linear response, where rotation is not directly proportional to the applied moment. Numerical investigations using the commercial software ABAQUS were conducted to analyze the steel base plate connections. The finite element (FE) models were verified against previous experimental results. Moreover, numerical findings of a comprehensive parametric investigation were conducted. The studied connections were examined with different configurations, including variations in the diameter, spacing, and number of the anchor bolts; the thickness of the base plate; and the applied axial force. The current …

Optimized Gadolinium-Do3a Loading In Raftpolymerized Copolymers For Superior Mr Imaging Of Aging Blood–Brain Barrier, Hunter A. Miller, Aaron Priester, Evan T. Curtis, Krista Hilmas, Ashleigh Abbott, Forrest Kievit, Anthony J. Covertine

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The development of gadolinium-based contrast agents (GBCAs) has been pivotal in advancing magnetic resonance imaging (MRI), offering enhanced soft tissue contrast without ionizing radiation exposure. Despite their widespread clinical use, the need for improved GBCAs has led to innovations in ligand chemistry and polymer science. We report a novel approach using methacrylate-functionalized DO3A ligands to synthesize a series of copolymers through direct reversible addition-fragmentation chain transfer (RAFT) polymerization. This technique enables precise control over the gadolinium content within the polymers, circumventing the need for subsequent conjugation and purification steps, and facilitates the addition of other components such as targeting ligands. …

Experimental Investigation On Mechanical Properties Of Pla Reinforced By Bamboo Fiber/Montmorillonite Clay Hybrid Composites And Analysis Of Machining Characteristics, Nirmal Kumar K

Theses and Dissertations

The study presents a comprehensive investigation into the development, characterization, and machining analysis of novel bio-based polymer hybrid composites comprising Polylactic acid (PLA), bamboo powders (BP), and montmorillonite clay particles (MMT). Initially, the hybrid composites were fabricated using a solvent-free stir casting process, optimizing the weight percentages of BP and MMT to enhance mechanical and thermal properties.

Mechanical tests, including tensile, flexural, and impact tests, along with thermal analysis using thermogravimetric analysis and differential scanning calorimetry, were conducted to evaluate the performance of the composites. In the subsequent phases, advanced machining techniques were employed to analyze the machining characteristics of …

Optical Responses Of Hybrid Electromagnetic Nanostructures, Dominic Bosomtwi

Optical Science and Engineering ETDs

Fano resonances result from the interference between a broad background and a narrow state, producing asymmetric scattering profiles. Under specific conditions, destructive interference collapses the Fano resonance width, leading to bound states in the continuum (BICs) that localize light within a nanostructure while maintaining an infinitely high-quality factor (Q-factor).

This dissertation explores the design of nanostructures with multilayer hybrid plasmonic-dielectric metasurfaces using full-wave numerical simulations, facilitating multiple Fano resonances and BICs. By adjusting nanoantenna dimensions, multiple modes are excited at plasmonic-dielectric interfaces, leading to strong interactions and hybridization of energy levels, manifested as Rabi splitting.

These findings enable advancements in …

Development Of Multivariate-Coupled Grouting Diffusion Model For Rcc, Xiao Sun, Yao Wang, Hengrui Liu, Zhuanjia Yang, Hongyan Ma

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Grouting Quality of Grout-Enriched Roller Compacted Concrete (RCC) is Difficult to Be Quantified Due to the Fact that the Crucial Effects, Such as Infiltration and the Compaction of the Skeleton of the RCC, Are Not Taken into Consideration. Combined with Model Testing, This Study Proposes an Improved Grouting Prediction Model Which Considers the Coupling Effect of Pore Fractal Properties, Time Variation of Grout Rheological Properties and Infiltration. Moreover, the Influence of Construction Parameters Such as Grouting Parameters, Construction Period Selection, Grouting Pipe Arrangement on the Grouting Effect Was Clarified. the Tests Indicated that the Maximum Diffusion Range of Slurry …

Medial Patellofemoral Ligament Augmented With A Reinforced Bioinductive Implant Is Biomechanically Similar To The Native Medial Patellofemoral Ligament At Time Zero In A Cadaveric Model, Sean Mcmillan, Seth Sherman, Zachary Brown, Erik Brewer, Elizabeth Ford

Rowan-Virtua School of Translational Biomedical Engineering & Sciences Departmental Research

Purpose: To biomechanically compare primary medial patellofemoral ligament (MPFL) repair (MPFLr) augmented with a reinforced bioinductive implant (RBI) to the native MPFL ligament and a semitendinosus (semi-T) MPFL reconstruction (MPFLR) at time zero. Methods: Four fresh-frozen matched pair cadavers (8 knees) were used to biomechanically compare the native MPFL to augmented MPFLr (n = 4) and semi-T MPFLR (n = 4). The native MPFL (n = 8) was isolated, preserving the femoral and patellar attachments, and pulled to failure. The semi-T was harvested from 1 of the matched pairs and whipstitched, as was a 250-mm × 5-mm RBI. A standard …

Factors Influencing Bridge Inspection In Developing Countries, Challenges And Future Directions: A Systematic Literature Review, Tuba Arshad, Dr. Rully Andhika Karim, Ayomi Dita Rarasati

Smart City

Bridges are very important to promote economic growth, mitigate poverty, and address persistent environmental issues. With the construction of new bridges, it is crucial to have an effective bridge inspection procedure. But most developing countries are still struggling in this field. This review examines common factors affecting bridge inspection in developing countries and their impact on bridge condition and performance while exploring strategies to improve those factors in developing countries in a systematic review. A total of 172 articles were identified through an explorative search of Direct Scopus, Google Scholar, and hand-search with limitations of the years 2013 to 2024. …

Space Program: Center For Space Research - Austin, Texas #1, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "Space Program: Center for Space Research - Austin, Texas" from July 12, 2024.

Fem-Based Conductive Heat Transfer Analytical Description Of Solidification Rate And Temperature Gradient During Lateral Laser Beam Oscillation Welding Of Aluminum Alloy, Jason Cheon, Cheolhee Kim, Sanghoon Kang, Minjung Kang

Mechanical and Materials Engineering Faculty Publications and Presentations

This study investigates the feasibility of utilizing the finite element method (FEM)-based conductive heat transfer (CHT) analysis simulation to determine temperature gradients and solidification rates at the solid–liquid interface during laser beam oscillation welding. By comparing experimental observations with FEM-based CHT analysis, the underlying microstructural evolution and grain formation during welding were examined. FEM-based CHT enables the calculation of temperature gradients (G) and solidification rates (R), offering insights into the formation of equiaxed structures, which are crucial for suppressing hot cracking. Columnar-to-equiaxed structure transition thresholds, such as G/R and G³/R, accurately predict …

Chemical And Physical Properties Of Fine Fractions From A Village Proximate To A Uranium Mine: Insights About Soil Health, Mary P. Haley

Nanoscience and Microsystems ETDs

Thousands of abandoned uranium mines (AUM) in Native American tribal lands have not been fully remediated, leaving uranium mine wastes exposed and accessible for potential erosion and transport by wind. Analyzing the metal and organic content of the fine-grained fractions in soils could uncover the impact of mine legacy on the soil health in communities that live in proximity to AUM. This study investigates the physical and chemical properties of the fine-grained fraction (μm) of soils to quantify the effect of heavy metal-bearing particulates on the soil health in the village of Paguate and within the Jackpile-Paguate AUM located on …

Membrane Hinges For Deployable Systems, C. Mitchel Skinner

Theses and Dissertations

Origami-inspired and deployable technology has become increasingly common in a variety of applications including satellite and antenna designs for space applications. The drive to utilize ultra-thin materials in the design of these deployable space structures has led to the development of membrane hinges. Membrane hinges show promise as an effective surrogate fold because of their potential advantages including requiring minimal volume and mass, allowing for small bending radii, and functioning without lubricant. Two challenges associated with membrane hinges include reliability after repeated cyclic loading and predictability of a large deployable with radially-unconstrained membrane hinges. The research presented includes the cyclic …

Performance Assessment Of Aboveground Storage Tanks During Flood Events, Md Manik Mia

LSU Doctoral Dissertations

This research addressed the performance of aboveground storage tanks (ASTs) and connected pipelines during floods. ASTs, integral to the oil and gas industry, store hazardous materials like crude oil and chemicals. Positioned near coastal regions, especially the hurricane-prone Gulf Coast, these areas are vulnerable to natural hazards such as floods and hurricanes. This vulnerability can lead to potential environmental and economic disasters, as seen with past hurricanes.
The primary objectives were to investigate AST bottom plate failure mechanisms under flood conditions, assess material failure in tank shells and bottom plates using finite element models, examine the behavior of connected pipelines, …

Gene Expression Analysis Reveals Dysregulation In Traumatic Brain Injury Leading To Tauopathy, Kristina M. Tosi

USF Tampa Graduate Theses and Dissertations

Traumatic Brain Injury (TBI) causes a cascade of detrimental events within neurons, contributing to a host of neurological diseases relating to dementia. In this study we have performed a meta-analysis comparing differentially expressed genes (DEG) in specific cell types such as neurons and microglia revealing inflammation as a common driver of neurological deficiencies post TBI. Inflammation and hypoxia are well characterized features of TBI; however, the molecular mechanisms causing tau hyperphosphorylation by tauopathy associated genes (TAG) post-TBI are currently poorly understood. Furthermore, there are limited in-vitro neuroinflammatory models that mimic primary and secondary TBI. We hypothesize that inducing hypoxia and …

Vysion Software, Isaias Hernandez-Dominguez Jr, Chander Luderman Miller

2024 Symposium

Vision loss presents significant challenges in daily life. Existing solutions for blind and visually impaired individuals are often limited in functionality, expensive, or complex to use. Vysion Software addresses this gap by developing a user-friendly, all-in-one AI companion app that provides features including text summarization, real-time audio descriptions, and AI-enhanced navigation. This project details the development plan, initial functionalities, and future vision for Vysion Software.

Slimsat, Robert J. Twiggs, Nick Pugh

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs and Nick Pugh titled "SlimSat" from July 11, 2024.

Biocompatibility Of Mussel-Inspired Water-Soluble Tissue Adhesives, Aishwarya V. Menon, Amelia A. Putnam-Neep, Caitlin E. Brown, Christa J. Crain, Gert Breur, Sanjeev K. Narayanan, Jonathan Wilker, Julie C. Liu

School of Chemical Engineering Faculty Publications

Wound closure in surgeries is traditionally achieved using invasive methods such as sutures and staples. Adhesion-based wound closure methods such as tissue adhesives, sealants, and hemostats are slowly replacing these methods due to their ease of application. Although several chemistries have been developed and used commercially for wound closure, there is still a need for better tissue adhesives from the point of view of toxicity, wet-adhesion strength, and long-term bonding. Catechol chemistry has shown great promise in developing wet-set adhesives that meet these criteria. Herein, we have studied the biocompatibility of a catechol-based copolymer adhesive, poly([dopamine methacrylamide]-co-[methyl methacrylate]-co-[poly(ethylene glycol) methyl …

Hurricane Vulnerability Of Above Ground Storage Tanks, Santosh Ghimire

LSU Master's Theses

The objectives of this research were to: 1) develop an approach to determine the effectiveness of regional storm surge reduction strategies and structural mitigation measures for aboveground storage tanks (ASTs), and 2) study the feasibility of controlled flotation of ASTs during flood and storm surge events. This study provided a comprehensive risk assessment strategy for regional portfolio of tanks, considering all dominant failure modes relevant to future planning initiatives aimed at reducing AST failures. Additionally, this research contributed a new methodology to prevent AST failures during flooding, offering a potential solution to prevent hazardous spills.

Design guidelines such as API …

Development And Characterization Of Automated Screen Mesh-Based Microfluidic Device To Perform Continuous Countercurrent Liquid-Liquid Extraction, Quinn Mcculloch

Nanoscience and Microsystems ETDs

Continuous Countercurrent Microfluidic Liquid-Liquid Extraction (CC-MLLE) shows tremendous potential to generate large numbers of equilibrium stages of separation in a small footprint, with a minimum of pumping, valving, and phase separation steps. However, CC-MLLE rarely appears in literature because it requires a delicate balance between capillary and hydrodynamic forces for deterministic flow.

This dissertation showcases a patented screen mesh-based CC-MLLE invention that performs stable, long-duration (> 36 hr.), countercurrent liquid-liquid extraction and achieves 37 equilibrium stages within a 38.5 μl internal volume. The device is fabricated from chemically resistant polyetheretherketone plastic, using standard machine shop equipment, a plotting cutter, screen …

The Newgeneratortm Decentralized Wastewater Treatment System For Non-Sewered Sanitation: Technology Advancement Through Field Evaluation And Modeling, Hsiang-Yang Shyu

USF Tampa Graduate Theses and Dissertations

Non-sewered sanitation systems (NSSS) offer innovative solutions to sanitation challenges in areas lacking basic facilities, utilizing advanced treatment technologies for on-site water reuse. The NEWgenerator (NG), an advanced NSSS developed at the University of South Florida under the Bill & Melinda Gates Foundation’s Reinventing the Toilet Challenge, integrates an anaerobic membrane bioreactor (AnMBR), an ion exchange-based nutrient capture system (NCS), and an electrochlorinator for final disinfection. This study builds on previous field trials of the NG system, focusing on developing, evaluating, and optimizing its water reuse capabilities through field trials, system dynamics modeling, and advanced monitoring techniques.

In the first …

Embedding Direction Of Arrival And Antenna Beamforming Algorithms On Automated Software Defined Radio Platforms, Adrian J. Lewis

Electrical and Computer Engineering ETDs

Antenna arrays are an essential technology in the modern era in both communications and radar applications. The algorithms used for antenna arrays are beginning to be embedded in smart device applications to enable greater communication abilities. This thesis explores the idea of embedding direction of arrival and beamforming algorithms using a software defined radio platform. Specifically, the Multiple Signal Classification (MuSiC) algorithm and Minimum Variance Distortionless Response (MVDR) algorithm are combined. The combination of similar algorithms has the potential to be used in many internet of things applications to enable more dynamic communication ability.