Engineering Commons^™

Capturing Interfacial Phase Change And Flow Physics During Vertical Downflow Condensation, Thanh Hoang Phan, Cho Ning Huang, Chirag R. Kharangate

Faculty Scholarship

Two-phase configurations can address the urgent demand for effective heat dissipation solutions in Naval power and energy systems. A better understanding of thermal transport processes in phase-change flows is critical for developing novel two-phase design tools for naval scientists and engineers. This study investigates interfacial phase change and flow dynamics during condensation flow through numerical simulations. An enhanced phase change model, incorporating a mass transfer intensity coefficient dependent on condensation film thickness, is implemented for vertical downflow condensation. A two-dimensional homogeneous two-phase Reynolds-Averaged Navier-Stokes model, coupled with the Shear-Stress Transport k-ω turbulence model, is employed. The developed solver is thoroughly …

A Study Of The Parameters Involved In Nir Sintering Of Silver Microparticle-Based, Pad-Printed Features, Jonah Clement Brooks

Theses and Dissertations

This study explores the effectiveness of pad printing and near-infrared (NIR) sintering for producing conductive silver microparticle traces. A new pad printer was set up, and silver inks with varying concentrations of silver particles (17.5 %v/v, 20 %v/v, and 25 %v/v) were manufactured, printed, and sintered. The study identified sintering time and silver concentration as the most influential parameters affecting resistivity, with the best result of 8.73 × 10⁻⁷ Ω·m achieved using 25 %v/v ink sintered for 3 seconds at full power. Although resistivity continued to decrease at this maximum sintering duration, further optimization of parameters, including NIR bulb distance …

Mechanism Of Property Enhancement Of Cu−Ti Alloys Via Microalloying With Cr And Mg Elements, Huan Wei, Hong Wei, Hua-Yun Du, Qian Wang, Cai-Zhi Zhou, Ying-Hui Weu, Li-Feng Hou

Faculty Publications

The effect of adding Cr and Mg on the microstructure and properties of Cu−Ti alloys was examined. Cu−Ti−Cr−Mg alloys were fabricated using vacuum induction melting. The microstructure and phase composition of Cu−Ti−Cr−Mg alloys in different aging states were characterized. Additionally, the hardness and electrical conductivity of the materials were investigated. Results show that the precipitation pattern in Cu−Ti−Cr−Mg alloys resembled that of binary Cu−Ti alloys, with Cr and Ti forming the intermetallic compound of Cr2Ti during casting. The introduction of Cr and Mg increased the hardness of the alloy. Increasing the Mg content in the Cu−Ti−Cr−Mg alloy led to grain …

Designing And Implementing A Classification Model For Mangoes Based On Size And Ripeness Using Image Processing, An Van Vo, Hau Van Mai, Hung Duy Ha, Tam Thanh Bui

Makara Journal of Technology

Image processing is an advanced technology that significantly supports production, identification, and quality control for fruits. This paper uses image processing techniques to develop a mango classification system based on size and ripeness. The system integrates hardware, including an Arduino microcontroller, camera, sensors, actuators, and a user-friendly computer interface for monitoring and control. The classification algorithm extracts key features of the mangoes, such as their color and shape, to categorize them into predefined quality classes. Experimental results demonstrate that the system achieves an accuracy exceeding 90% for both ripeness and size classification, with a productivity level of 300 kg/hour, surpassing …

Small-Scale Production Of Bespoke Accelerated Aging Plutonium Alloy, K. S. Holliday, A. M. Parkes, Devin Rappleye, D. J. Roberts, K. J. Kondrat, S. A. Simpson, A. J. Swift, U. Mehta, R. M. Kissinger, D. L. Rosas, L. S. Ripplinger, E. R. Tardiff, S. L. Harris, S. Perkins, C. Hawkins, N. J. Gibbs, R. J. P. Driscoll, A. T. Sidambe, R. A. Cole, T. T. Roehling, J R. Jeffries

Faculty Publications

This study demonstrates the 100 g scale manufacture of a plutonium alloy that ages at an accelerated rate. The resulting alloy ages six times faster than typical weapons-grade plutonium due to the addition of ²³⁸Pu. As a major innovation, the process involved using a partial direct oxide reduction technique. This method was achieved by developing a new, complex geometry stirrer using additive manufacturing to reduce the ²³⁸Pu oxide and efficiently incorporate it into weapons-grade plutonium metal. The material was then purified by molten salt extraction and electrorefining before being alloyed with gallium. The alloy was then cold-rolled and …

Performance Of Quasi-Isotropic Gf/Pet Laminates In Impact And Compression After Impact Loading, Yubo Ma, Shuoyan Niu

Research & Creative Achievement Day

The impact resistance and residual compression strength of two types of glass fiber/ polyethylene terephthalate composites are investigated in this research project. The first materials are glass fiber/ polyethylene terephthalate glycol (GF/PRTG) and the second material is glass fiber/ amorphous polyethylene terephthalate (GF/PETa). Both matrix materials are ductile thermoplastic polymers. The ductility of the matrix is expected to improve the impact resistance of the composites. The advantage of the first material is higher ductility and improved fire resistance, and the advantage of the second material is high bonding strength with the reinforcing fiber glass. Both matrixes and low cost engineered …

Panel Impact And Compressing Strength Testing, Michael A. Dietz, Wyatt N. Laborde

Research & Creative Achievement Day

Intro/Purpose: This project was conducted to investigate how a material's compressive strength is affected after being impacted while supported on three sides. This has broader implications, helping us understand how military equipment, such as battleships, have their compressive strength affected when impacted by projectiles like bullets, shrapnel, or other objects.

Methodology: This test was conducted using panels made of multiple layers of fiberglass pressed together to form a solid sheet. We then cut these sheets into multiple panels. These panels were rectangular, with a tab coming off three sides. The three tabs simulated a wall supporting the material …

Durafold Premium: Composite Folding Table, Regan G. Harvey, Hendrik J. Welti, Parker D. Buth, Stadler J. Lucas, Grace Eischens

Research & Creative Achievement Day

Current folding table designs are made to be lightweight, but the table surface made of high density polyethylene (HDPE) can break and is not repairable. Our team designed the DuraFold Premium as an alternative to the traditional folding tables. The table surface and legs use a sandwich construction consisting of top and bottom face sheets made with carbon and glass reinforcing fibers in an epoxy resin system. In between the two face sheets is a honeycomb core material. This approach results in the DuraFold Premium being extremely durable while remaining lightweight. Over the past academic year, our team has been …

Carbon Club Carrier: A Lightweight Motorized Golf Pushcart, Tanner J. Conniff, Eric M. Courneya, Alex Hilo, Max R. Kauphusman, Luis M. Rodriguez

Research & Creative Achievement Day

The Carbon Club Carrier is a lightweight, motorized golf pushcart designed to enhance convenience and ease of use for golfers. Traditional golf push carts can be cumbersome and require significant effort to maneuver across varying terrain. Our design integrates a carbon fiber frame for durability and weight reduction, coupled with an electric push-assist motor to reduce strain on the user. The use of carbon fiber composite materials ensures a strong yet lightweight structure, optimizing portability and performance. The push-assist motor system is designed to provide variable-speed assistance, allowing golfers to move their clubs effortlessly across the course. The carrier is …

Sustainable Desalination: Carbon Capture From Reject Brine Using Uae Date Palm Leaf, Haneen Ahmed Abu Saifan

Thesis/ Dissertation Defenses

The United Arab Emirates faces significant challenges in managing reject brine from desalination processes. Additionally, the energy-intensive nature of desalination contributes to greenhouse gas emissions, particularly carbon dioxide (CO2). This study explores the potential of date palm leaf ash, an underutilized agricultural waste, as a sustainable material for brine desalination and CO2 capture. Date palm leaves were converted into ash through incineration at 550°C and 750°C, followed by chemical activation using potassium hydroxide. The study evaluated the ash's efficiency in removing key ions (Na+, Mg2+, Ca2+, K+) from reject brine and capturing CO2, while optimizing process conditions using response surface …

A Novel Fixture Development To Characterize Compression After Impact Damage Of Unidirectional Thermoplastic Composite Laminates, Matt K. Ficker, Dominic L. Perez, Noah Misukanis, Luke E. Poglayen, Jacob Kosmoski

Research & Creative Achievement Day

Impact testing of unidirectional thermoplastic composite materials is a challenge due to the Mode I shear of the primary tows on the impact side. Thermoplastic composite products manufactured using laminate stacking are bonded together with films of polymer on both sides of oriented fiber in typically a cross-ply or quasi-isotropic stack. The resulting failure from the distortion field imposed by a hemispherical tup is debonding along the interface between layer 1 and layer 2 oriented in the layer 1 direction from impact site to edge of panel. This failure mode results when the sample is too small relative to the …

Assessing The Impact Of Internal Flow Dynamics On Detection Region Concentrations Of Low-Cost Optical Particle Counters, Livingstone Quarshie

Theses and Dissertations

Particulate matter (PM) poses significant risks to human health and the environment, making accurate measurement essential for exposure assessment and regulatory decisions. While traditional reference methods provide reliable data, they are often bulky, expensive, and difficult to maintain. Optical Particle Counters (OPCs) offer a cost-effective alternative, commonly used in clean rooms, residential spaces, and personal exposure monitoring. These devices rely on light scattering to measure PM concentrations. However, low cost OPCs face challenges related to calibration and measurement accuracy, requiring careful performance evaluation. This study used computational fluid dynamics (CFD) tools, CONVERGE Studio and ANSYS Fluent, to simulate a simplified …

Evaluation Of Chloride Diffusion In Concrete Using Bulk Diffusion Test And Scanning Electron Microscopy, Payton Davis

Doctoral Dissertations and Master's Theses

Reinforced concrete is one of the most widely used construction materials in the world with many bridges and other major infrastructure consisting of such structural elements. A primary concern impacting the durability of concrete is chloride penetration in aggressive environments such as marine or coastal areas. In such environments, chloride ions can penetrate into the pores of concrete leading to the corrosion of embedded steel reinforcement which compromises the structural integrity of concrete. To investigate the issue, a comprehensive experimental program was designed and implemented which involved the preparation and testing of 31 different concrete mixes, each incorporating varying proportions …

Utilizing Augmented Reality For Immersive Space Mission Design, Joseph Anderson

Doctoral Dissertations and Master's Theses

Designing spacecraft mission trajectories is a complex, tedious, and stringent process that requires a strong background in astrodynamics and programming due to the complex dynamical environment of space. The current 2D visualization methods for displaying these geometrically abstract trajectories make it difficult to understand the true nature of more complex orbits. Advancements in immersive headsets and their intuitive interaction capabilities make them ideal for solving and understanding 3D problems that require complex spatial representations, revealing an innovative and unique opportunity for the astrodynamics and space mission planning field. This effort covers the development of an immersive space mission design tool …

Advanced Manufacturing Of Multifunctional Shape Memory Polymer Composites And Self-Healing Systems, John B. Konlan

LSU Doctoral Dissertations

The need for multifunctional light weight structures for engineering applications is on the rise. Multifunctional composites are desired because of their ability to combine multiple functionalities into one structure. The advantages of a high strength-to-weight ratio of multifunctional composites make them desirable and suitable for use in energy-efficient applications. Shape-memory polymers (SMPs) have attracted interest over the past several decades because of their multifunctional nature. They have found use in many applications such as aerospace, satellites, automobiles, textiles, and biomedical devices, where lightweight and multifunctionality are key. The self-healing nature of most SMPs makes them suitable for use in lightweight …

Usb-Powered Virtual Cyber Labs: A Plug-And-Play Solution For Cybersecurity Education, Danny Galvis, Keith Fernandez, David Abiandu

Center for Cybersecurity

No abstract provided.

Rfid Tag For Continuous User Verification, Christian Zambrano

Center for Cybersecurity

RFID Tag for Continuous User Verification — Kean University Research Days

Machine Learning Techniques For Detecting Distributed Denial Of Service (Ddos) Attacks, Caesar Marte

Center for Cybersecurity

Machine Learning Techniques for Detecting Distributed Denial of Service (DDoS) Attacks — Kean University Research Days

Comparative Analysis Of Operating System Security: Evaluating The Most Secure Os, Rodrigo Gonzalez

Center for Cybersecurity

https://www.keanresearchdays.com/student-poster-presentation-2025-feed/comparative-analysis-of-operating-system-security-evaluating-the-most-secure-os

Examination Of A Bench-Scale Model For Post-Wildfire Flood And Water Quality Mitigation Solutions, Cheyenne Ethridge

Honors Theses

The objective of this study is to determine a potential low-cost, sustainable, and rapidly deployable solution for post-wildfire flood and water quality mitigation in communities reliant on surface water for drinking water. Coalinga, Fresno County, California was selected as a study area for a full-scale solution due to its high risk of wildfires, high social vulnerability, and relatively low community resilience. A bench-scale demonstration of the system directs water into a gravel infiltration zone surrounded by a weir perimeter and followed by a clarifier. Because of their abundance in the area, almond shells were explored as a coagulant additive to …

In-Situ Void Formation During Liquid Composite Molding For Preformed Warp, Weft, And Alternating Orientation Rtm Samples, Tanner Cal Garrett

Theses and Dissertations

Carbon fiber reinforced parts are utilized by the transportation industry due to being strong yet lightweight. The highest quality parts are made using carbon fiber (CF) pre-impregnated with resin processed in an autoclave to reduce void content. The autoclave process is expensive and takes up a large amount of space, so liquid composite molding (LCM) is a less expensive alternative. The parts produced using LCM can be manufactured to rival the mechanical performance of parts made with pre-preg in an autoclave, but concerns remain over voids. Most research pertaining to void formation has been done ex-situ by either micro-CT or …

Surface-Texture Fabrication Of Zirconia-Toughened Alumina Using Focused Ion-Beam Machining, Kameron M. Woodruff

Theses and Dissertations

Focused ion-beam machining (FIBM), a precise form of micro-machining, was tested for feasibility in the manufacturing of microscopic dimples in zirconia-toughened alumina (ZTA), a wear resistant ceramic used in artificial joint replacements. The interaction between the ion-beam and the ceramic was characterized in terms of material removal rate (MRR), surface roughness, and notable irregularities (e.g. pitting, steps at vertical faces). These characteristics were used to design and machine patterns of microscopic dimples for tribological testing. The dimple size and pattern area were limited due to a slow MRR and high cost of milling. No significant difference in the coefficient of …

Investigation Of Temperature Control's Effects In Additive Friction Stir Deposition Of Al 7050-T7451, Jason Noah Glenn

Theses and Dissertations

Additive Friction Stir Deposition (AFSD) is a friction stir based process that includes the addition of material extruding through a bore in the center of the rotating tool. The deformation of the material from the tool rotation and high pressures result in fully dense depositions printed at very high rates with forged like mechanical properties. While deposition properties of varying alloys have been increasingly published, little work has been done investigating control of the process and as with all additive processes, consistency and predictability are of significant concern before implementation can occur. One common control method implemented in Friction Stir …

Scalable Cyber-Physical Testbed For Cybersecurity Evaluation Of Synchrophasors In Power Systems, Shuvangkar Chandra Das, Tuyen Vu, Hebert L. Ginn Iii

Faculty Publications

This paper presents a synchrophasor-based real-time cyber-physical power system testbed with a novel security evaluation tool, pySynphasor, that can emulate different real attack scenarios on the phasor measurement unit (PMU). The testbed focuses on real-time cyber-security emulation using different components, including a real-time digital simulator, virtual machines (VM), a communication network emulator, and a packet manipulation tool. The script-based VM deployment and software-defined network emulation facilitate a highly scalable cyber-physical testbed, which enables emulations of a real power system under different attack scenarios such as address resolution protocol (ARP) poisoning attack, man-in-the-middle (MITM) attack, false data injection attack (FDIA), and …

Investigating The Role Of Blood Models In Predicting Rupture Status Of Intracranial Aneurysms, Zonghan Lyu, Mostafa Rezaeitaleshmahalleh, Nan Mu, Jingfeng Jiang

Michigan Tech Publications

Purpose. Selecting patients with high-risk intracranial aneurysms (IAs) is of clinical importance. Recent work in machine learning-based (ML) predictive modeling has demonstrated that lesion-specific hemodynamics within IAs can be combined with other information to provide critical insights for assessing rupture risk. However, how the adoption of blood rheology models (i.e., Newtonian and Non-Newtonian blood models) may influence ML-based predictive modeling of IA rupture risk has not been investigated.Methods and Materials.In this study, we conducted transient CFD simulations using Newtonian and non-Newtonian rheology (Carreau-Yasuda [CY]) models on a large cohort of 'patient-specific' IA geometries (>100) under pulsatile flow conditions to …

Measurement Of Groundwater And Contaminant Fluxes In Fractures Using A Combined System Of Passive Flux Meter And Multiport Sampler, Qasim Raza Khan

Thesis/ Dissertation Defenses

Groundwater and contaminant movement in fractured rock aquifers is highly variable. Its dependence on fracture apertures and orientation as well as fracture network interconnectivity is not well understood. This poses a challenge to the measurement of groundwater and contaminant fluxes, especially when using open-hole techniques, which significantly alter natural flow conditions by connecting different fractures along an open borehole or a well. In this work, the use of Fractured Rock Passive Flux Meter (FRPFM) with invisible tracer and visible dye component to measure groundwater fluxes and identify geometric fracture parameters is explored through laboratory experiments. The invisible tracer component results …

Detection Of Error-Related Potentials Evoked By Haptic Feedback Of Eblow Flexion And Extension, Dylan Michael Page

Graduate Theses - Mechanical Engineering

Robotic rehabilitation systems are increasingly used to restore sensorimotor functions for individuals with disabilities. However, many assistive devices lack sensory feedback, which is essential information for user control and embodiment. Haptic feedback is a simple and non-invasive solution to provide sensory feedback through tactile stimulation. Errors in haptic feedback can reduce the device’s effectiveness. This study aims to investigate whether error-related potentials can be detected when evoked through errors in haptic feedback during elbow flexion and extension. Electroencephalography recordings showed statistically significant decreases in power spectral density under the conditions of 12.5 Hz, 2.8 and 4.0 seconds after the onset …

Isolation Structure Simulation And Measurement To Reduce Transmit-Receive Coupling In Compact X-Band Fmcw Radar, Bruce E. Averill

Theses and Dissertations

Transmit-receive isolation in a compact X-band FMCW radar antenna system is critical for system performance. A set of candidate isolation structures are explored. In the process, performance of a commercial FDTD EM simulation software package is evaluated for antenna array modelling. Noise parameters of receiver electronics on a prototype radar processing front-end are tested. Improvements to the BYU Microwave Lab RF anechoic chamber are also reported, with a focus on measurement repeatability and antenna pattern angular resolution.

In-Situ Rtm Videos, Tanner Garrett

ScholarsArchive Data

This data set contains videos of resin infusion experiments.

Improved Soil Parameters For Lateral Pile Analysis From Full-Scale Load Tests In Cohesionless Soil, Dallin Bruce Widmer

Theses and Dissertations

One common software program developed for analyzing single laterally loaded piles is called LPILE. Soil properties are required as input into LPILE. For sands, the soil properties required are effective soil unit weight, γ’; modulus of subgrade reaction, k; and the internal friction angle,ϕ’. There are two commonly used methods to obtain ϕ’ and subsequently k: the API method and Bolton method. Using the Bolton method to determine the soil strength properties gives more accurate load deflection values with respect to measured values from field tests. The Bolton method led to a 46% reduction in the predicted deflection error compared …