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Incorporating Genai Into Information Literacy Instruction: Find Engineering Standards, Lauren Todd
Incorporating Genai Into Information Literacy Instruction: Find Engineering Standards, Lauren Todd
Generative AI Teaching Activities
Students will prompt GenAI tools to find relevant engineering standards that might apply to their mechanical engineering design project, then they must evaluate the responses.
Utilization Of Sodium Flame Synthesis For The Formation And Deposition Of Pure Metal Materials For Applications In Additive Manufacturing, Zachariah Wargel
Utilization Of Sodium Flame Synthesis For The Formation And Deposition Of Pure Metal Materials For Applications In Additive Manufacturing, Zachariah Wargel
McKelvey School of Engineering Theses & Dissertations
Advanced material classes, such as high temperature alloys, ceramics, and refractory materials have become a key area of focus for expansion in the realm of additive manufacturing. Factors such as high melting points, material homogeneity, and physical properties such as ductility limit the application of popular additive manufacturing methods to these material classes. By utilizing sodium flame synthesis and deposition (SFD) technology, nanoparticle materials can be synthesized via combustion in a laminar co-flow diffusion burner and impacted such that the deposits can be used to manufacture designed components. By using the applicable precursor materials of metal chlorides and elemental sodium …
Activity: Students Find Conceptual Errors In Ai Output, Janie Brennan
Activity: Students Find Conceptual Errors In Ai Output, Janie Brennan
Generative AI Teaching Activities
Instructor asks ChatGPT questions related to a key concept to find one where ChatGPT has conceptual errors. Ask students to find the errors and explain them.
Design And Characterization Of 3d-Printed Hydrogel Lattices With Consistent Structural And Mechanical Anisotropy, Daniel Yoon
Design And Characterization Of 3d-Printed Hydrogel Lattices With Consistent Structural And Mechanical Anisotropy, Daniel Yoon
McKelvey School of Engineering Theses & Dissertations
This thesis explores the use of 3D printing to fabricate soft hydrogel lattice structures with consistent properties, including varying levels of mechanical anisotropy. Magnetic resonance elastography (MRE) is a non-invasive imaging tool to estimate and characterize the mechanical properties of tissue. MRE “phantoms” (physical surrogate models) have been used to assess how well MRE can measure and estimate mechanical properties. While gel phantoms generally simulate brain tissue, almost all have been isotropic. Prior studies have shown that white matter brain tissue is structurally and mechanically anisotropic. To validate anisotropic MRE, phantoms with controllable, reproducible anisotropic material properties are needed. This …
Application Of Finite-State Wake Models To Rotors Re-Entering Their Own Wake, Michael Seay Morrow
Application Of Finite-State Wake Models To Rotors Re-Entering Their Own Wake, Michael Seay Morrow
McKelvey School of Engineering Theses & Dissertations
This paper details the development of a finite-state, dynamic wake model for the purpose of modeling a helicopter rotor reentering its own wake. This model stems directly from both the Peters-Morillo wake model to determine the velocity field on and above the helicopter rotor and the Peters-Fei model to compute the velocity field below the rotor. The specific case of nonzero net thrust was evaluated under assumptions of axial flow and potential flow theory. Results consist of computations of the inflow velocity for this case, along with comparison to closed-form, potential flow solutions for validation. The finite-state model is shown …
Environment And Response Of 3d-Encapsulated Mesenchymal Stem Cells To Mechanical Loading, Augustus Greenwood
Environment And Response Of 3d-Encapsulated Mesenchymal Stem Cells To Mechanical Loading, Augustus Greenwood
McKelvey School of Engineering Theses & Dissertations
This thesis explores the micromechanical environment induced when cyclically compressing hydrogels via finite element modeling and experimentally on the impact of loading on mesenchymal stem cells (MSCs) when encapsulated withing 3D hydrogel matrices. Degenerative joint diseases, characterized by cartilage degradation, present significant challenges due to cartilage's limited self-repair capacity. Innovative approaches, including stem cell-based therapies and engineered biomaterials, have emerged as promising strategies for cartilage repair and regeneration. This work specifically investigates the calibration of a bioreactor, the uniformity of load response across the hydrogel constructs via finite element modeling (FEM), and the stress response of MSCs subjected to various …
An Apparatus To Quantify Lengthwise Flexural Rigidity Profiles Of Endovascular Devices, Charles B. Suskin
An Apparatus To Quantify Lengthwise Flexural Rigidity Profiles Of Endovascular Devices, Charles B. Suskin
McKelvey School of Engineering Theses & Dissertations
Endovascular procedures require access to distal anatomical sites through the vasculature using catheters and guidewires. Quantitative frameworks for device behavior during procedures hold the potential to drive device design through greater understanding of the mechanical behavior of endovascular devices, and offer the potential to personalize care based on a patient's particular vascular anatomy. However, data that would facilitate this technology are lacking, partly due to undisclosed material properties from manufacturers and partly due to the intricate variations along the length of each device due to material changes and the intersections between them. We developed a three-point bend test methodology on …
Enhanced Fabrication Of Microdroplet Generator Nozzle Arrays: Optimizing Koh Etching For Microfluidic Applications, Hongyu Bai
McKelvey School of Engineering Theses & Dissertations
Ultrasonic microdroplet generators are useful devices with broad applications ranging from aerosolized drug delivery to three-dimensional (3D) printing-based additive manufacturing. One such technology comprises a microfabricated array of nozzles with droplet production driven by a piezoelectric transducer. The present study focuses on refining a critical fabrication step, anisotropic wet etching of pyramidal nozzles using a basic potassium hydroxide (KOH) solution. Given the integral role of nozzle geometry in device operation, high-precision techniques including Reactive Ion Etching (RIE), Deep Reactive Ion Etching (DRIE), and KOH wet etching were employed. A tapering geometry is preferred for acoustic wave focusing and efficient droplet …
Mems 411: Bamboo Clamping Device, Grace Chen, Anya Gupta, Yosef Weiss
Mems 411: Bamboo Clamping Device, Grace Chen, Anya Gupta, Yosef Weiss
Mechanical Engineering Design Project Class
The objective of this design project was to create an automatic clamping machine to
keep bamboo bundles tight during lashing. Currently, manual clamping and lashing
of bamboo require simultaneous user effort, posing challenges in terms of efficiency
and safety. Our project introduces a mechanical and automatic clamping tool,
designed to significantly alleviate the physical strain on users and enhance overall
safety. This report details two primary designs of solutions to this problem. The
first is a motor-tightened hose clamp controlled via a three-way switch. The second
design is a claw clamp with an inflatable pouch used to pin the bamboo …
Mems 411: Dialysqueeze, Ranch Kimball, Maeve Lomax, Tyler Carlson
Mems 411: Dialysqueeze, Ranch Kimball, Maeve Lomax, Tyler Carlson
Mechanical Engineering Design Project Class
Design a device to reduce occupational fatigue injuries suffered by nurses who must manually clamp and unclamp tubing for dialysis machines. This device was designed for MEMS 411 Senior Design.
Mems 411: Heavy Cart Ramp Assistant, Ethan Current, Kevin Xiong, Nick Zanchi
Mems 411: Heavy Cart Ramp Assistant, Ethan Current, Kevin Xiong, Nick Zanchi
Mechanical Engineering Design Project Class
Dr. Katharine Flores has a heavy Argon tank that needs to be put on a scale and wants a device that a single person can operate to assist them in that task.
Mems 411: Swing Energy Demo, Joshua Yoon, Owen Culver, Angel Wan, Gabriel Myong
Mems 411: Swing Energy Demo, Joshua Yoon, Owen Culver, Angel Wan, Gabriel Myong
Mechanical Engineering Design Project Class
A device to demonstrate the energy processes of a swing was created with the intention of display at the St. Louis Science Center.
Mems 411: Smart Shirt Electronics Housing, Nickolas Allen, Aaron Deleon, Dominic Fulginiti
Mems 411: Smart Shirt Electronics Housing, Nickolas Allen, Aaron Deleon, Dominic Fulginiti
Mechanical Engineering Design Project Class
Millions of Americans suffer from sleep apnea, a chronic condition that can impact the quality of sleep and livelihood of those impacted by it. The sleep tests that are performed to see if a patient has sleep apnea are very invasive to those that undergo them, but the WUSTL Smart Shirt removes the need for such tests. This biometric shirt contains electrodes that measure blood pressure, heart rates, and EKG diagnostics that create reports to determine if the patient has sleep apnea, removing the need for the invasive sleep tests for a diagnosis. We were tasked with making the electronics …
Mems 411: Pinch Clamp Clipper, Mackenzie Molina, Jaimie Lin, Oliver Avery
Mems 411: Pinch Clamp Clipper, Mackenzie Molina, Jaimie Lin, Oliver Avery
Mechanical Engineering Design Project Class
The purpose of this project was to design a device to take stress off the CMC thumb joint when applying pinch clamps to dialysis tubing. The motivation was to reduce the risk of osteoarthritis in renal care nurses. Sydney Livermore, an OT student at McMaster University, identified that nurses who had to routinely clip pinch clamps on dialysis tubes were at risk of developing osteoarthritis in their CMC joints. She asked us to design a device that could clip the pinch clamps while reducing the force required to do so. The device needed to be able to clip the clamps …
Mems 411: Mini-Golf Robot, Matthew J. Sullivan, Jack Nanez, William Urdahl, Eli Cohen
Mems 411: Mini-Golf Robot, Matthew J. Sullivan, Jack Nanez, William Urdahl, Eli Cohen
Mechanical Engineering Design Project Class
The following report details the design and construction of a mini-golf robot over
three months. The robot was designed under the standards provided by the
ASME Fall 2023 Design Challenge. The robot would need to traverse the mini-golf
course, completing it in under 10 minutes with the assistance of an attached striker
mechanism. It was necessary that the robot could position itself precisely with
respect to the goofball, while also staying stationary while striking the object. The
robot design timeline followed the guidelines of the engineering design process, with
concept generation, concept selection, prototype embodiment and design refinement
all playing …
Mems 411: Mini-Golf Robot Vehicle, Catherine Huang, Shicheng Li, Colin Chen, Maximilian Li
Mems 411: Mini-Golf Robot Vehicle, Catherine Huang, Shicheng Li, Colin Chen, Maximilian Li
Mechanical Engineering Design Project Class
The primary objective of the project is to develop a remote-controlled vehicle capable of completing a round of mini golf as part of the ASME Student Design Competition. The vehicle’s functionalities are categorized into driving and golf-ball striking. Our group is specifically responsible for the former aspect.
The remote-controlled vehicle is expected to traverse through the designated competition field and exhibit the ability to maneuver between and over obstacles, including a high wall and a low platform. Our design should adhere to the competition regulations set forth by ASME SDC, which include specific criteria for the vehicle such as size …
Mems 411: Vehicle Entry Aid, Sara Wargo, Joshua Doro, Benjamin Swonger, Justin Stohlman
Mems 411: Vehicle Entry Aid, Sara Wargo, Joshua Doro, Benjamin Swonger, Justin Stohlman
Mechanical Engineering Design Project Class
Handicapped individuals such as those with prosthetic legs or diabetes can struggle greatly with entering large vehicles such as trucks. In this struggle, a client uses a rigid step stool with a rope tied through it to lift himself and then the stool into the vehicle. This report outlines an initiative to design and manufacture a better solution to this problem. A collapsible, two-step step stool was fabricated with a spring loaded retraction system. The design process for this solution is outline from start to finish, showing the extensive thought process that was followed to create the final product.
Mems 411: In-Beach Pressure Sampler Design Report, Alex Mccormick, Mark Lipkin, Nirvan Patel Masini, Austin Bick
Mems 411: In-Beach Pressure Sampler Design Report, Alex Mccormick, Mark Lipkin, Nirvan Patel Masini, Austin Bick
Mechanical Engineering Design Project Class
Claudio would like a device to put into the beach sand, around nest-depth, to
measure and record data that can determine pressure as waves crash and recede.
Mems 411: Waterproof Enclosure For Smart Shirt Microcontroller, Josh Towns, Eric Montufar-Morales, Jacob Williams
Mems 411: Waterproof Enclosure For Smart Shirt Microcontroller, Josh Towns, Eric Montufar-Morales, Jacob Williams
Mechanical Engineering Design Project Class
The purpose of this project was to create an enclosure for a microcontroller for an electronic shirt, made by Dr. Mary Ruppert-Stroescu. The electronic shirt was made to help people with sleep apnea track their EKG, blood pressure, and heart rate in an easy and non-invasive way.
The current design being used has sharp edges and is not very secure. The goal of our new design was to make the enclosure comfortable to the wearer while also maintaining a water tight seal. This was done through multiple iterations of rounded enclosures with different gaskets. The end design was a two …
Mems 411: Medical Clamp, Edis Skampo, Rodery Gonzalez, Sokcheatra Samrith, Sean Lucas
Mems 411: Medical Clamp, Edis Skampo, Rodery Gonzalez, Sokcheatra Samrith, Sean Lucas
Mechanical Engineering Design Project Class
The goal of the team was to design a plier that would be able to clamp down a medical clamp used for a dialysis machine. Ideally the plier should be able to clamp down 3 medical clamps on three separate dialysis tubes in less than 5 seconds, reduce the force required to clamp those clamps by 4 times, and weigh less than 113 grams. The product design was broken down into 3 separate concepts, with four options for each component. The most preferable option of each component was chosen and several risk factors were taken in consideration so that the …
Mems 411: Piston Pong, Lauren Faust, Emma Kroll, Natalie Fisher, Caroline Ferry
Mems 411: Piston Pong, Lauren Faust, Emma Kroll, Natalie Fisher, Caroline Ferry
Mechanical Engineering Design Project Class
This report documents the design process of our ”Piston Pong” device. Our device was designed to be an educational demonstration of pneumatics and energy transformations using work and fluids models. The concept is that a bike pump will pump air into a holding container. After enough pressure is built up inside, the air will be released from the holding tank to a pneumatic cylinder. The cylinder will be released, hitting and launching a ball into the air. Additionally, force and pressure sensors would allow the energy to be calculated to fully understand the energy transformation. Our priorities for this design …
Mems 411: Heavy Cart Ramp Assistant, Caelyn Walton-Macaulay, Eniya Jaber, Nashleen Salazar Rodriguez
Mems 411: Heavy Cart Ramp Assistant, Caelyn Walton-Macaulay, Eniya Jaber, Nashleen Salazar Rodriguez
Mechanical Engineering Design Project Class
Some experiments in Prof. Kathy Flores’s lab use argon gas, which is stored in a
big tank. A scale is used to determine how much gas is left in the tank.
To get the tank onto the scale, a person must roll it up a short, fairly steep ramp
onto the scale platform. There is a ramp on the other side of the scale too, so
overshooting the platform causes the ramp to crash into the wall (the lab has taped a foam bumper onto the wall to mitigate this). Once finished, the cart is rolled
back down the ramp, …
Mems 411: 3d Clay Printer, Nanami Mezaki, Isabelle Sasser, Garrett Radtke, Juliana Bush
Mems 411: 3d Clay Printer, Nanami Mezaki, Isabelle Sasser, Garrett Radtke, Juliana Bush
Mechanical Engineering Design Project Class
The Washington University School of Architecture has a class called Digital Ceramics, that utilizes a 3D Printer that prints clay instead of plastic filament. Students use this device to make art projects. As interesting as this device is, it isn’t without problems. Our team decided to tackle some of the problems involved which we recognized to be: long set-up and tear-down times, and unsuccessful prints due to nozzle falling out.
Mems 411: Pinskee Ball - A Work-Energy Demo, Kyle Puckett, Helena Teixeira-Dasilva, Seth Kleinberg, Sydney Norstad
Mems 411: Pinskee Ball - A Work-Energy Demo, Kyle Puckett, Helena Teixeira-Dasilva, Seth Kleinberg, Sydney Norstad
Mechanical Engineering Design Project Class
The goal of our project is to develop a fun and engaging Work-Energy Demo for Dr. James Potter of Washington University in St. Louis and a Science Center or Children's Museum. We aim to teach 6 - 10 year old children about Work-Energy and Energy Transfer in a fun, engaging, and competitive way by using an arcade style machine. The following project is intended to be a Pinball-Based Conservation of Energy Demo/Game for a Science Museum. Using both pinball and skeeball characteristics, this device will give kids thorough knowledge of work energy systems in a fun and interactive way. The …
Calculating The Difference In Stiffness Of Living T Cells Through Micropipette Aspiration, Minju Lee
Calculating The Difference In Stiffness Of Living T Cells Through Micropipette Aspiration, Minju Lee
McKelvey School of Engineering Theses & Dissertations
Cardiovascular disease (CVD) accounted for 17.9 million deaths in 2019, with fibrosis contributing to nearly a quarter of these fatalities [1,2]. Fibrosis, characterized by excessive connective tissue formation, has been strongly linked to T cells, essential components of the immune system. This study explores the mechanisms of T cell activation and the subsequent changes in biophysical properties like diameter, stiffness, and elasticity, aiming to develop therapeutic strategies for fibrosis-related diseases, including CVD. Utilizing the micropipette aspiration technique, we accurately assessed T cell stiffness and observed a change in bulk cell stiffness upon activation. The results demonstrated increased fluid-like behavior in …
Performance And Emissions Study Of N+3 And N+4 Engine Models With Several Fuel Types Using Npss, Abel Solomon
Performance And Emissions Study Of N+3 And N+4 Engine Models With Several Fuel Types Using Npss, Abel Solomon
McKelvey School of Engineering Theses & Dissertations
The aviation industry is known to be one of the major contributors to greenhouse gases accounting for 4.9% of the global greenhouse emissions. With the ever-increasing threat of climate change to the overall survival of the planet, the exploration of new technologies and alternative energy sources that minimize greenhouse gas emissions are of paramount importance. In this regard, the development of propulsion systems well suited for the performance and emissions requirements of future commercial aircraft plays a crucial role. This thesis investigates N+3 and N+4 technology-level propulsion systems that are proposed by NASA as possible propulsion systems for advanced single-aisle …
Jme 4110: Automated Railway Decoupler, Optimized, Robert Murphy, Grace Stonner, Adam Young, Matt Stokes
Jme 4110: Automated Railway Decoupler, Optimized, Robert Murphy, Grace Stonner, Adam Young, Matt Stokes
Washington University / UMSL Mechanical Engineering Design Project JME 4110
Disconnecting freight cars from one another in trains that may be many thousands of feet long involves the dangerous and inefficient operation of manual decoupling. We have produced a system that enables freight cars to disconnect remotely, streamlining rail operations and boosting efficiency.
Jme 4110: Upgraded Refrigeration Door Cycling System, Keenan Bland, Kelvin Woods, Tyler Mclaughlin
Jme 4110: Upgraded Refrigeration Door Cycling System, Keenan Bland, Kelvin Woods, Tyler Mclaughlin
Washington University / UMSL Mechanical Engineering Design Project JME 4110
This project focuses on improvements to a door cycling system. Both a fortified rope for the pulley system, ensuring extended operation, and the integration of a support track. This track is designed to bolster the clevis linked to an air piston that facilitates smooth piston rod travel without deflection. With these advancements, our door cycling system attains a new level of reliability, durability and functionality.
Jme 4110: Door Cycling Station, Briana Kagy, Alexander Clark, William Todd, Seth Flamm
Jme 4110: Door Cycling Station, Briana Kagy, Alexander Clark, William Todd, Seth Flamm
Washington University / UMSL Mechanical Engineering Design Project JME 4110
The objective of this project was to design and build a door cycling station to be used for fatigue testing commercial refrigerator doors, including the door gaskets, hinges, and handles. The system must be low maintenance and reliable for at least two million cycles, and it must fit within the provided budget. The design concept includes a rodless pneumatic cylinder and a system of wear-resistant ropes, eyebolts, and pulleys.
Engineered Material Systems For Mimicking Tissue And Disease, Margrethe Ruding
Engineered Material Systems For Mimicking Tissue And Disease, Margrethe Ruding
McKelvey School of Engineering Theses & Dissertations
This thesis comprises two studies involving design and application of soft material systems. The goal of the first study was to design, fabricate, and characterize hydrogel lattice structures with consistent, controllable, anisotropic mechanical properties. Lattices, based on four types of unit cells (cubic, diamond, vintile, and Weaire-Phelan), were printed using stereolithography (SLA) of polyethylene glycol diacrylate (PEGDA). In order to create structural anisotropy in the lattices, unit cell design files were scaled in one direction by a factor of two in each layer and then printed. The mechanical properties of the scaled lattices were measured in shear and compression and …