Engineering Commons^™

Finite Element Analysis Of The Bearing Component Of Total Ankle Replacement Implants During The Stance Phase Of Gait, Timothy S. Jain

Master's Theses

Total ankle replacement (TAR) implants are an effective option to restore the range of motion of the ankle joint for arthritic patients. An effective tool for analyzing these implants’ mechanical performance and longevity in-silico is finite element analysis (FEA). ABAQUS FEA was used to statically analyze the von Mises stress and contact pressure on the articulating surface of the bearing component in two newly installed fixed-bearing total ankle replacement implants (the Wright Medical INBONE II and the Exactech Vantage). This bearing component rotates on the talar component to induce primary ankle joint motion of plantarflexion and dorsiflexion. The stress response …

Design And Analysis Of Zero Voltage Switching Hybrid Voltage Divider, Stephen Ulysses Alvarado Estrada

Master's Theses

This work explores the design, construction, and analysis of a novel DC-DC converter which incorporates combinations of switching capacitors and inductors to achieve an integer voltage divider function, without the need for a feedback loop controller to achieve the desired output voltage. The proposed Hybrid Voltage Divider additionally provides zero voltage switching (ZVS) at turn on transitions which yields improved overall efficiency of the converter. Besides a proof-of-concept via computer simulations, another primary goal of this thesis is to demonstrate the functionalities of the proposed Zero Voltage Switching Hybrid Voltage Divider (ZVS-HVD) through hardware prototyping. The proposed ZVS-HVD was designed …

Multilayer Pva/Gelatin Nanofibrous Scaffolds Incorporated With Tanacetum Polycephalum Essential Oil And Amoxicillin For Skin Tissue Engineering Application, Ebrahim Soleiman-Dehkordi, Vahid Reisi-Vanani, Samanesadat Hosseini, Zahra Lorigooini, Vajihe Azimian Zvareh, Mahour Farzan, Elham Moghtadaie Khorasgani, Karen Lozano, Zohreh Abolhassanzadeh

Mechanical Engineering Faculty Publications

Wound infection is still an important challenge in healing of different types of skin injuries. This highlights the need for new and improved antibacterial agents with novel and different mechanisms of action. In this study, by electrospinning process Tanacetum polycephalum essential oil (EO), as a natural antibacterial and anti-inflammatory agent, along with Amoxicillin (AMX) as an antibiotic are incorporated into PVA/gelatin-based nanofiber mats individually and in combination to fabricate a novel wound dressing. Briefly, we fabricated PVA/gelatin loaded by Amoxicillin as first layer for direct contact with wound surface to protects the wound from exogenous bacteria, and then built a …

Can Neural Networks Reach Human Vision Levels On Object Recognition Tasks?, Luke D. Baumel, Mikayla Cutler, Matt Hyatt, Joseph Tocco, William Friebel, Nicholas Baker Dr., George K. Thiruvathukal Dr.

Psychology: Faculty Publications and Other Works

Object recognition is a crucial function of biological vision; it allows us to draw conclusions about a visual scene that transcends the image formed by the retina. However, the task of object recognition quickly becomes a challenge when hindrances such as viewing angle, object distance from observer, illuminant qualities, and potential occlusions become active variables. Additionally, the diversity of visual features within the same category of object, coupled with the numerous contexts in which an object may be observed is demonstrative of the formidable task that is object recognition. Previous research showed a significant texture bias in Convolutional Neural Networks’ …

An Investigation Of Torso Muscle Fatigue And Its Relation To Discomfort During Vertical Vibration Exposure, Nathan H. Hodges

Theses and Dissertations

Military and civilian helicopter pilots often experience back pain attributed to vibration exposure during flight and sustained poor posture, known as the "helicopter hunch." This study investigated torso muscle activation using surface electromyography (EMG) to assess the relationship between discomfort and muscle fatigue. Eight subjects were exposed to different vibration frequencies over two-hour periods, with EMG data collected every five minutes. Significant differences in muscle activation were observed before and after vibration exposure, suggesting increased muscle activation during vibration compared to prolonged seating alone. Discomfort surveys indicated higher discomfort during vibration.

Assisted Delivery Device, Rachel Rowe, Madeliene Mumford, Jenna Eissmann, Brittany Trinh

Biomedical Engineering

Current devices used to assist in complicated births present serious risks to both the mother and the fetus, which has caused a decline in the use of these devices over the last decade. This senior project team has proposed an alternative device that interfaces with the infant’s shoulders that would decrease these risks and contribute to the decrease of unnecessary c-sections due to device inadequacy. This Statement of Work includes research on the downfalls of current devices, existing patents, customer requirements, engineering specifications, and a design plan through December of this year. The next phase of this project will include …

Neonatal Respiratory Therapy Interface, Kennedy Austin, Evan Manley, Parker Murray, Harrison Oen

Biomedical Engineering

This Final Report reviews and outlines the scope, objectives, and deliverables for the BCPAP Interface Redesign project, aimed at enhancing the functionality, usability, and patient experience of the existing BCPAP interface. It also includes detailed testing results and manufacturing plans for the device prototype. The current system has challenges in universal usability, time constraints, and patient comfort, which this project intends to address effectively. The goal of this project is to reevaluate and redesign the interface of the bubble continuous positive air pressure (BCPAP) machine’s attachment site with the infant. Due to the millions of premature neonates and thousands of …

The Professional Constructor, Full Issue, Volume 49, Number 01

The Professional Constructor

No abstract provided.

Mixed Reality For In-Field Construction Activities: A Systematic Literature Review To Identify Challenges And Solutions, Sumanth Sai. P., Jason Lucas

The Professional Constructor

With the new industrial revolution, “Industry 4.0,” it is important to understand and incorporate the new standards and technologies evolving in the market. Industry 4.0 relies on the integrated use of big data and analytics coupled with various technologies to help make decisions and manage projects. This revolution has brought Mixed Reality (MR) into the construction field. Mixed reality (MR) offers significant benefits for smart industries, such as enhancing productivity, training, manufacturing, error correction, assembly, and packaging processes. But how feasible are Mixed Reality Technologies (MRTs) considering the high initial investment required for acquiring devices, subscribing to services, planning and …

Computer-Integrated Construction Management With Procore, Vedanth Ashoka, M.G. Matt Syal

The Professional Constructor

The construction industry faces difficulties in managing the enormous amounts of data generated at each stage of a project, impacting project coordination and decision-making. Currently the industry is facing the issue of a lack of interoperability among the multiple software programs being used for different functions. To address this lack of interoperability, there is a need for an integrated environment that allows seamless flow of data between different functions. Among the few software tools that have emerged in recent year, Procore, a cloud-based construction project management software, has emerged as a widely used solution in the industry, enabling collaboration among …

Wave Overtopping Layer Thickness On The Crest Of Rubble Mound Seawalls, Ali Koosheh, Amir Etemad-Shahidi, Nick Cartwright, Rodger Tomlinson, Marcel R. A. Van Gent

Research outputs 2022 to 2026

During storms, ensuring the protection of people, vehicles and infrastructure on the crest of coastal structures from wave overtopping hazards is crucial. The thickness of the wave overtopping layer is a key variable used for assessing safety and maintaining a secure design. Traditionally, this parameter is associated with the height difference between the fictitious wave run-up level exceeded by 2% of waves and the crest freeboard of coastal structures. This study aims to investigate the wave overtopping layer thickness on the crest of rubble mound seawalls. To achieve this, a series of 125 small-scale 2D physical model tests were conducted …

Immersive Virtual Reality-Based Learning As A Supplement For Biomedical Engineering Labs: Challenges Faced And Lessons Learned, Ishita Tandon, Vitali Maldonado, Megan Wilkerson, Amanda Walls, Raj R. Rao, Mostafa Elsaadany

Biomedical Engineering Faculty Publications and Presentations

Introduction: Immersive virtual reality (VR) based laboratory demonstrations have been gaining traction in STEM education as they can provide virtual hands-on experience. VR can also facilitate experiential and visual learning and enhanced retention. However, several optimizations of the implementation, in-depth analyses of advantages and trade-offs of the technology, and assessment of receptivity of modern techniques in STEM education are required to ensure better utilization of VR-based labs.

Methods: In this study, we developed VR-based demonstrations for a biomolecular engineering laboratory and assessed their effectiveness using surveys containing free responses and 5-point Likert scale-based questions. Insta360 Pro2 camera and Meta Quest …

A General Materials Data Science Framework For Quantitative 2d Analysis Of Particle Growth From Image Sequences, Sameera Nalin Venkat, Thomas G. Ciardi, Mingjian Lu, Preston C. Deleo, Jube Augustino, Adam Goodman, Jayvic Cristian Jimenez, Anirban Mondal, Frank Ernst, Yinghui Wu, Roger H. French, Laura S. Bruckman

Faculty Scholarship

Phase transformations are a challenging problem in materials science, which lead to changes in properties and may impact performance of material systems in various applications. We introduce a general framework for the analysis of particle growth kinetics by utilizing concepts from machine learning and graph theory. As a model system, we use image sequences of atomic force microscopy showing the crystallization of an amorphous fluoroelastomer film. To identify crystalline particles in an amorphous matrix and track the temporal evolution of the particle dispersion, we have developed quantitative methods of 2D analysis. 700 image sequences were analyzed using a neural network …

Infrared Investigation In Singapore (Iris) Observatory: Urban Heat Island Contributors And Mitigators Analysis Using Neighborhood-Scale Thermal Imaging, Clayton Miller, Vasantha Ramani, Clayton Miller

Research Collection College of Integrative Studies

This paper studies heat fluxes from contributors and mitigators of urban heat islands using thermal images and weather data. Thermal images were collected by a rooftop observatory between November 2021 and April 2022. Over the same period, weather stations were operating at several locations on a university campus in Singapore. From collected data, a method was defined to estimate sensible and latent heat fluxes from building façades, vegetation, and traffic. Before analyzing heat fluxes using the method, thermal images were calibrated against measurements made with contact surface sensors. Results show that the method can be used to study heat fluxes …

A Novel Data Fusion Fr Amework To Enhance Contextual Awareness Of The Autonomous Vehicles For Accurate Decision Making, Henry Alexander Ignatious

Dissertations

Autonomous driving has the potential to bring significant changes and benefits to various aspects of transportation. Autonomous vehicles (AVs) use a combination of advanced sensors, cameras, radar, lidar, GPS, maps, and AI algorithms to perceive their environment, make decisions, and control their movements. Though there is a significant increase in the AVs utility, there are several challenges associated with the AVs among which ensuring safety and security for a reliable drive is still an existing challenge. The majority of accidents involving the AVs result from faulty decision-making resulting in fatal incidents. Multiple elements contribute to the flawed decision-making in autonomous …

Environmental Analysis Of Codfish Production And Consumption In Portugal, Ayla Frost, Joana Almeida, Joana Dionisio, Radu Godina, Cátia Magro

Journal of Critical Global Issues

Codfish, a typical dish consumed frequently in Portugal, is fished in the cold Northern Atlantic waters far from the Portuguese coast. Thus, regional tensions and the environmental impacts of Portuguese codfish importation and production are significant current issues. The present study uses a life cycle assessment methodology to evaluate the array of environmental impacts of the production of 1 kg of codfish, following a cradle to gate approach. The life cycle inventory was grouped into catch and preprocessing, transit, and curing stages. The data collection of products and processes in each stage was based on scientific peer reviewed documents, technical …

Gastroretentive Microballoons Of Olmesartan Medoxomil: Formulation And In Vitro-In Vivo Evaluation, Yadishma A Gaude, Archana S Patil, Sweta Aloshi

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

The Confluence Of Nanocarriers And Heat Shock Protein 70 In Pioneering Glioblastoma Multiforme Therapy: Forging Pathways Towards Precision Targeting And Transformation, Amrita Arup Roy, Srinivas Mutalik

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Nano Suspension Technology Method And Characterization And Techniques For Improving Stability Of Nanosuspension In Drug Delivery, Onkar Arote

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Biosynthesis Of Zinc Oxide Nanoparticles Capped By Fumaria Parviflora Extract Against Breast Cancer Cell Lines, Praveen Halagali

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Precision Nanomedicine To Treat Non-Small Cell Lung Cancer, Akanksha Dessai, Usha Y Nayak

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

A Novel Polyelectrolyte Complex Nanocomposite Of Chitosan And Karaya Gum Derivatives For Co-Delivery Of 5-Fluorouracil And Curcumin In Cancer Therapy, Rakshitha ., Manohar Mahadev, Rompicherla Narayana Charyulu, Vishalakshi Badalamoole

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Fabrication And Evaluation Of Spray Dried Polymeric Nanoparticle Dry Powder For Inhalation: A Strategy To Deliver Nintedanib To Lungs, Usha Y Nayak, Varalakshmi Velagacherla

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Chitosan Loaded Nanoparticles For Ocular Delivery, Vignesh N

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Nanoparticles In The Treatment Of Pulmonary Cancer, Anjan Makkar

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Photo-Triggered Nanotheranostics: Precision Medicine For Cancer Treatment, Rajeswari Subramanian, Chelsea George, Ashwini T, Usha Y Nayak

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Guided Missiles: Nanoparticles Enhancing Cisplatin's Cancer-Fighting Accuracy, Leroy Rueben Alvares

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Development Of Sustained And Controlled Drug Delivery System Using Biodegradable Polymer To Treat Fungal Keratitis, Meghana Prabhu, Sulatha V Bhandary, Bharath Raja Guru, Anil Tiwari

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Navigating Skin Delivery Horizon: An Innovative Approach In Pioneering Surface Modification Of Ultra Deformable Vesicles, Devika Nayak, Mahalaxmi Rathnanand, Vamshi Krishna Tippavajhala

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.

Extracellular Vesicle-Mediated Transfer Of Doc2b: Unveiling Tumor-Suppressive Mechanisms In Cervical Cancer, Sangavi Eswaran, Shama Prasada Kabekkodu

International Conference on ‘NANOSCIENCE AND NANOTECHNOLOGY'

No abstract provided.