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Articles 421 - 450 of 1828
Full-Text Articles in Engineering
Mems 411: P.O.T.T.E.R. Test Frame, Marie Drevets, Kiersten Horton, Tony Sancho
Mems 411: P.O.T.T.E.R. Test Frame, Marie Drevets, Kiersten Horton, Tony Sancho
Mechanical Engineering Design Project Class
Our senior mechanical engineering design is a flexure test frame. At our university, third-year mechanical engineering students take a class called machine elements, in which the final project is a structural design competition. The students design a strong but lightweight object. The P.O.T.T.E.R. device can be used to judge the structural integrity of students contest entries. The customer who commissioned this project is Dr. Potter, who teaches the machine elements class. The customer needs a portable test frame which can apply enough compressive force to fracture an object which is secured in the device. The test frame should also measure …
Mems 411: Soccer Robot Project, Evan Sucherman, Dylan Mitchell, Benjamin Hessman, Emre Koc
Mems 411: Soccer Robot Project, Evan Sucherman, Dylan Mitchell, Benjamin Hessman, Emre Koc
Mechanical Engineering Design Project Class
This project aims at designing a robot that is capable of playing a simplified form of soccer against other robots. The original competition was created by the ASME organization as a student design competition in 2018. This project is an adapted version in which some of the rules and guidelines have been changed to fit the goals of this class better. The design parameters for this project include: having the robot drive around the parameter of the playing field in under 17 seconds, having the vehicle successfully capture the ball within 2 seconds of approaching 8 out of times, and …
Volleyball Crossbow- Group W, Giovanni Alvarez, Kyle Krippner, Alexis Rivera
Volleyball Crossbow- Group W, Giovanni Alvarez, Kyle Krippner, Alexis Rivera
Mechanical Engineering Design Project Class
The Volleyball Crossbow was our solution to the problem of a limited number of skilled setters on a volleyball team. This device will alleviate expectations of the setters and improve the efficiency of practice drills. The major customer needs for this device included consistency in launch, height and angle adjustability, high speed of operation, and ease of use. The Volleyball Crossbow provides a relatively low-cost, easy to manufacture design that meets these customer needs. As the name suggests, the design inspiration came from the crossbow mechanism. Two elastic bands attached to a cross-member and a cart on a track are …
Mems 411: Volleyball Setter, Alexander Zuga, Liam Cadden, Neil Cumberland, Jacob Ridderhoff
Mems 411: Volleyball Setter, Alexander Zuga, Liam Cadden, Neil Cumberland, Jacob Ridderhoff
Mechanical Engineering Design Project Class
Our volleyball setting machine is intended for use by the WashU men’s club volleyball team to improve their training. It allows their skilled hitters to get more reps in practice because there currently aren’t enough skilled setters on their team.
Mems 411: Giant Pouched Rat Trap, Ronald Fields, Mariano Gonzalez, Edward Li, Jordan Hu
Mems 411: Giant Pouched Rat Trap, Ronald Fields, Mariano Gonzalez, Edward Li, Jordan Hu
Mechanical Engineering Design Project Class
Dr. Braude from the Biology department at Washington University in St. Louis is currently working on a project training giant Gambian pouched rats to find mines and other bombs in former conflict zones. In order to trap Gambian pouched rats, Professor Braude asked a few MEMS 411 Senior Design groups to design and build a trap that can safely capture the rats. The trap had to be about 2-3 feet long, 6 inches in diameter, completely mechanical, simple, and it had to cost less than 30 USD to build.
Mems 411: Laundry No Mo (Lnm), Justin Tai, Minju Lee, Logan Johnson, Elijah Stewart
Mems 411: Laundry No Mo (Lnm), Justin Tai, Minju Lee, Logan Johnson, Elijah Stewart
Mechanical Engineering Design Project Class
How can you optimize your time and labor while folding laundry? You can do so with this laundry folding device called Laundry No Mo (LNM).
Mems 411: The Bueffer 3000, Ty W. Bedillion, Krista Sudar, Anna Oneto, Cole Kocjancic
Mems 411: The Bueffer 3000, Ty W. Bedillion, Krista Sudar, Anna Oneto, Cole Kocjancic
Mechanical Engineering Design Project Class
We were tasked with creating a quality product for a customer for MEMS 411 Senior Design. Our customer was the Washington University in St. Louis Men's Club Volleyball team and they asked us to create a volleyball setting machine.
Mems 411: Friction Frenzy, Angelo Hawa, Landon Tafoya, Noah Owens
Mems 411: Friction Frenzy, Angelo Hawa, Landon Tafoya, Noah Owens
Mechanical Engineering Design Project Class
The demo is designed to demonstrate the concept of friction to younger children(ages 4+) using an incline plane. The premise is to allow the user to slowly elevate a surface until a block resting on top begins to slide, at which point an electronic interface displays the calculated amount (or coefficient) of friction. The core functions of the device are discussed based on the customer needs in order to identify key performance goals for its successful operation. The design process is documented from initial modeling to the final prototype and critical metrics including safety and ease of fabrication are discussed. …
Mems 411: Giant Pouched Rat Trap, Shannon Wang, Isha Shah, Vaishali Shah, Elizabeh Saliba
Mems 411: Giant Pouched Rat Trap, Shannon Wang, Isha Shah, Vaishali Shah, Elizabeh Saliba
Mechanical Engineering Design Project Class
Our goal is to design a giant pouched rat trap that meets the customer needs from professor Stan Braude. The giant pouched rats are to be breed and trained to find land mines. Therefore, the rats must be captured in good condition. However, giant pouched rats are not passive once caught and tries to escape every way possible. In the past, with traditional trap wires, they tend to get caught in the wire and hurt themselves. Our solution offers a completely smooth inner wall of the trap to prevent damage to the rats, while improving on the functionality of the …
Mems 411: The Hash Setting Slasher, Garrett Barber, William Koopman, Andrew Werner, Alexandra Carr
Mems 411: The Hash Setting Slasher, Garrett Barber, William Koopman, Andrew Werner, Alexandra Carr
Mechanical Engineering Design Project Class
The volleyball setter has certain patents that utilize some sort of rotational component or is a stationary platform that the ball rests on before the player hits it. Our design is different because it utilizes the mechanical properties of springs to propel the ball forwards. We had certain specifications to meet to allow the volleyball to be natural in its trajectory and able to be shot efficiently and effectively. Some specifications required positioning adjustments and some defined how the ball should be propelled through the air. We also had parameters involving cost, weight, and the repeatability of the mechanism to …
Mems 411: Soccer Robot, Luis Castro, Lydia Kang, Moshe Eskenazi, Ryan Whelan
Mems 411: Soccer Robot, Luis Castro, Lydia Kang, Moshe Eskenazi, Ryan Whelan
Mechanical Engineering Design Project Class
The American Society of Mechanical Engineers (ASME) hosts annual competitions for engineeringstudents across the world. The ASME 2018 Student Design Competition wasto build a robotic soccerteam to compete in a FIFA World Cup style elimination tournament. Robot(s) must fit inside a 0.5 x 0.5 x 0.5 meter cube,be powered by batteries, and be controlled by a human operator with a wireless radio transmitter or through an electrical “umbilical” cord. The balls are tennis balls.
Mems 411: Free Kick Robot, Rahi Miraftab-Salo, Will Goldberg, Wlodie Rebesque
Mems 411: Free Kick Robot, Rahi Miraftab-Salo, Will Goldberg, Wlodie Rebesque
Mechanical Engineering Design Project Class
The free kick robot was designed to help train the club soccer goalkeeper: Brady Shaeffer, to save shots on goal. After a customer interview with the our client, we aimed our design to shoot accurate and powerful shots in quick succession. In addition the robot was to be easily transportable. Initially, after looking at some patents, the most commercially used soccer training robots involved two parallel disks spinning and shooting out soccer balls. As a result an initial prototype was built with this idea. However, during our concept selection, we realized that the cost of building our machine was out …
Mems 411: The Water Bike, Erin Flynn, Patrick Grindel, Nicholas Payne, Ryan Allin
Mems 411: The Water Bike, Erin Flynn, Patrick Grindel, Nicholas Payne, Ryan Allin
Mechanical Engineering Design Project Class
This design project explored the concept of a bike that can float on water and be used to assist lifeguards in rescues. The goal was for it to be quickly converted from a road to water configuration and be quick and stable enough to be a useful tool in saving drowning swimmers.
Mems 411: Asme Soccer Robot, Braden Arango, Brendan Otani, Florie Markwell
Mems 411: Asme Soccer Robot, Braden Arango, Brendan Otani, Florie Markwell
Mechanical Engineering Design Project Class
This project was based off of a variation of the ASME Soccer Robot Competition, where 5 teams were tasked with creating a soccer robot to compete with. The main objective for each team was to create a remote-controlled robot with an integrated shooting mechanism that was capable of shooting a tennis ball, with accuracy, into a goal. A design process was used to create this robot from scratch, where multiple concepts were created and tested through mock-ups and prototypes to better understand the problem at hand. Throughout this process, three main prototype goals were prioritized: the ability to drive around …
Mems 411: Mini Test Frame, Howard Wu, Max Richter, Baker Blevins, Andrew Issac
Mems 411: Mini Test Frame, Howard Wu, Max Richter, Baker Blevins, Andrew Issac
Mechanical Engineering Design Project Class
A lightweight, cheap, and portable compression test frame designed for testing students' structural designs for the Machine Elements class. Measures load and displacement applied on the specimen to determine the specimen with the highest strength.
Mems 411: African Pouched Rat Trap, Kelechi Achilefu, Paul Joseph, David Allen, Chase Green
Mems 411: African Pouched Rat Trap, Kelechi Achilefu, Paul Joseph, David Allen, Chase Green
Mechanical Engineering Design Project Class
What is often thought of as a rat trap is often in reality a mouse trap, or a trap designed to catch small rodents. Rats can be quite large and catching them without harming them can be quite difficult. Current market solutions generally either kill or harm the rodent which is not acceptable for our client's needs. While there are some solutions on the market, they fall short of the needs of our client which is more specialized due to the size of rodent they will be capturing, the circumstances surrounding the capture, the number of rodents our client needs …
Mems 411: Bearing Plate Loader, Daniel Firescu, Treeton Allison, Bethany Starr
Mems 411: Bearing Plate Loader, Daniel Firescu, Treeton Allison, Bethany Starr
Mechanical Engineering Design Project Class
Create a Bearing Plate Loader to move a plate from one location to another.
Mems 411: Soccer Robot, Sam Ginsberg, Ella Johnson, Aaron Ocken, Andrew Bergantz
Mems 411: Soccer Robot, Sam Ginsberg, Ella Johnson, Aaron Ocken, Andrew Bergantz
Mechanical Engineering Design Project Class
This design project was altered from the 2018 ASME Soccer Robot competition. Dr. Jackson Potter led a competition where groups built remote control robots to compete against each other in 1v1 matches based on a modified rule set from the initial 2018 competition.
Using Computer Vision To Track Anatomical Structures During Cochlear Implant Surgery, Nicholas Bach
Using Computer Vision To Track Anatomical Structures During Cochlear Implant Surgery, Nicholas Bach
McKelvey School of Engineering Graduate Student Theses & Dissertations
There is a steep learning curve for surgeons performing cochlear implant surgeries. We aimed to use computer vision to track anatomical features with the goal of helping surgeons perform cochlear implant surgery without damaging the cochlea. We compared nine algorithms in total, seven object tracking algorithms and two optical flow algorithms utilizing the LucasKanade method, on manually created cochlear implant surgery videos to determine the accuracy associated with each. Compared with eight other algorithms, we observed that an iterative pyramidal implementation of the Lucas-Kanade (IPLK) method, implemented through OpenCV, performed the best. The IPLK method had the lowest error rate …
Analysis Of Time-Dependent Adaptations Of Lumbar Intervertebral Disc Morphology During Standing-Induced Symptoms Of Low Back Pain, Donald Aboytes
Analysis Of Time-Dependent Adaptations Of Lumbar Intervertebral Disc Morphology During Standing-Induced Symptoms Of Low Back Pain, Donald Aboytes
McKelvey School of Engineering Graduate Student Theses & Dissertations
Low back pain (LBP) is a traumatic impairment for individuals with staggering socioeconomic burden. The etiology of LBP is exceedingly complex and confounded by comorbidities. The source of pain is difficult to pin-point because the offending stimuli are not always known. One promising avenue is to investigate the progression of LBP symptoms in young and otherwise healthy individuals. The population that exhibits preclinical LBP in prolonged standing may be particularly suitable for understanding the anatomical changes that occur during the progression of the symptoms. Since the pain symptoms subside upon exiting the standing position, they are an ideal demographic to …
Scatter Estimation And Correction For Experimental And Simulated Data In Multi-Slice Computed Tomography Using Machine Learning And Minimum Least Squares Methods, Cornelia Wang
McKelvey School of Engineering Graduate Student Theses & Dissertations
Current research aims to reduce the stopping power ratio prediction error in the inputs to the proton therapy planning process to less than 1%, which allows for improved radiation therapy planning. Our present study on reducing SPR error neglects the effect of scattering, which can increase SPR error by as much as 1-1.5%. The idea is that for each source-to-detector pair, 24 mm collimation data is close to 3 mm collimation data but with increased signal due to scattering. The goal is to estimate 3 mm collimation data from 24 mm collimation data. Pairs of sinograms, both experimental data and …
The Challenges Of Applying Computational Legal Analysis To Mhealth Security And Privacy Regulations, Brian Tung
The Challenges Of Applying Computational Legal Analysis To Mhealth Security And Privacy Regulations, Brian Tung
McKelvey School of Engineering Graduate Student Theses & Dissertations
As our world has grown in complexity, so have our laws. By one measure, the United States Code has grown over 30x as long since 1935, and the 186,000-page Code of Federal Regulations has grown almost 10x in length since 1938. Our growing legal system is too complicated; it’s impossible for people to know all the laws that apply to them. However, people are still subject to the law, even if they are unfamiliar with it. Therein lies the need for computational legal analysis. Tools of computation (e.g., data visualization, algorithms, and artificial intelligence) have the potential to transform civic …
Regularized Coordinate-Based Neural Representation Learning For Optical Tomography, Renhao Liu
Regularized Coordinate-Based Neural Representation Learning For Optical Tomography, Renhao Liu
McKelvey School of Engineering Graduate Student Theses & Dissertations
Neural representation learning recently shows outstanding performance in several computer vision tasks. In this thesis, we propose a novel self-supervised neural represented reconstruction method for optical tomography. Our method uses a Multi-Layer Perceptron (MLP) network to represent the target sample without the need for any ground truth or training data. The MLP weights serve as a latent representation of the target object. Any desired permittivity information can be inferred by querying the neural network within the sample domain. We also investigate applying regularization to implicitly restrict the manifold of MLP for better performance. Our experiments produce low artifacts results with …
Photoacoustic Imaging, Feature Extraction, And Machine Learning Implementation For Ovarian And Colorectal Cancer Diagnosis, Eghbal Amidi
Photoacoustic Imaging, Feature Extraction, And Machine Learning Implementation For Ovarian And Colorectal Cancer Diagnosis, Eghbal Amidi
McKelvey School of Engineering Graduate Student Theses & Dissertations
Among all cancers related to women’s reproductive systems, ovarian cancer has the highest mortality rate. Pelvic examination, transvaginal ultrasound (TVUS), and blood testing for cancer antigen 125 (CA-125), are the conventional screening tools for ovarian cancer, but they offer very low specificity. Other tools, such as magnetic resonance imaging (MRI), computed tomography (CT), and positron emission tomography (PET), also have limitations in detecting small lesions. In the USA, considering men and women separately, colorectal cancer is the third most common cause of death related to cancer; for men and women combined, it is the second leading cause of cancer deaths. …
Novel Photothermal Materials And Thermally Engineered Membranes For Solar Desalination, Sisi Cao
Novel Photothermal Materials And Thermally Engineered Membranes For Solar Desalination, Sisi Cao
McKelvey School of Engineering Graduate Student Theses & Dissertations
Although 71% of earth surface is covered with water, more than 97% of it is saltwater, and freshwater is limited to only about 2.5%. The freshwater shortage has been exacerbated due to the environmental pollution, increased agriculture needs, socio-economic development, and population growth. Among various desalination technologies, membrane distillation has gained wide attention due to its ability to treat highly saline water utilizing waste heat from industrial processes. However, the implementation of conventional membrane distillation is hindered in the remote regions and disaster-struck communities where the low-grade thermal energy from industrial plants and electricity are not readily available. To address …
Towards The Discovery Of Prognostic Biomarkers For Glioblastoma Using Resting-State Functional Connectivity, Andy G. S. Daniel
Towards The Discovery Of Prognostic Biomarkers For Glioblastoma Using Resting-State Functional Connectivity, Andy G. S. Daniel
McKelvey School of Engineering Graduate Student Theses & Dissertations
Gliomas are highly diffusive, primary brain tumors. The most malignant form, glioblastoma, has a dismal survival rate: 14-17 months following the current standard of care, which consists of surgery, radiation, and chemotherapy. Insights into the molecular, cellular, and microenvironmental components of glioblastoma have revealed a vast array of factors utilized to support its proliferation, infiltration, and resistance to treatment. Recent advancements have also identified diagnostic and prognostic biomarkers that are now being used to guide treatment planning. However, survival has improved only marginally, thus emphasizing the continued need for novel biomarkers and treatment strategies. Given its delicate location in the …
Droplet And Particle Dynamics In Aerosol Reactors And Environmental System, Sukrant Dhawan
Droplet And Particle Dynamics In Aerosol Reactors And Environmental System, Sukrant Dhawan
McKelvey School of Engineering Graduate Student Theses & Dissertations
Aerosol science and engineering is an enabler for continual advances in nanomaterial synthesis. The spray-based techniques have been used extensively for the large-scale production of nanoparticles. Synthesis of particles with a desired the size and morphology is of key importance for exploiting their properties for their use in several emerging technologies. In contrast to useful nanomaterials, the aerosols from industrial flue gas, dust, indoor cooking, pathogens, and wildfire etc. are harmful to human health. It is important to understand how these harmful aerosols travel through the environment and potentially impact the health. It is also very critical to improve the …
Flexible Electronics For Neurological Electronic Skin With Multiple Sensing Modalities, Haochuan Wan
Flexible Electronics For Neurological Electronic Skin With Multiple Sensing Modalities, Haochuan Wan
McKelvey School of Engineering Graduate Student Theses & Dissertations
The evolution of electronic skin (E-skin) technology in the past decade has resulted in a great variety of flexible electronic devices that mimic the physical and chemical sensing properties of skin for applications in advanced robotics, prosthetics, and health monitoring technologies. The further advancement of E-skin technology demands closer imitation of skin receptors' transduction mechanisms, simultaneous detection of multiple information from different sources, and the study of transmission, processing and memory of the signals among the neurons. Motivated by such demands, this thesis focuses on design, fabrication, characterization of novel flexible electronic devices and integration of individual devices to realize …
Nucleation Studies In Barium Silicate Glasses And Soda-Lime Silicate Glass, Xinsheng Xia
Nucleation Studies In Barium Silicate Glasses And Soda-Lime Silicate Glass, Xinsheng Xia
McKelvey School of Engineering Graduate Student Theses & Dissertations
Controlling nucleation is key for the manufacture of glasses and glass-ceramics. It has been observed by different researchers in many silicate glasses that at low temperatures the critical work of cluster formation (i.e. the nucleation barrier) slowly rises rather than decreasing with decreasing temperature. However, this experimental observation is in contradiction with nucleation theories. In this dissertation, crystal nucleation was studied in BaO·2SiO2, 5BaO·8SiO2, and Na2O·2CaO·3SiO2 glasses. The main research topics include measurements of the nucleation rate, the structural evolution of the glass, and the low-temperature nucleation behavior. A special focus is given to the low-temperature nucleation anomaly. In total, …
Identifying And Resolving Artifacts Associated With Measurement And Characterization Of Light Absorbing Organic Aerosols, Nishit Shetty
Identifying And Resolving Artifacts Associated With Measurement And Characterization Of Light Absorbing Organic Aerosols, Nishit Shetty
McKelvey School of Engineering Graduate Student Theses & Dissertations
Atmospheric aerosols constitute a major short-lived climate pollutant which affects the Earth’s radiative budget by scattering and absorbing solar radiation. Carbonaceous aerosol (CA) emissions -especially those from fossil fuel and biomass combustion- contribute 20-90% of the total fine particulate mass and can absorb light in the visible and near ultraviolet (UV) wavelengths, underscoring their importance in climate forcing. CA emissions comprise of organic aerosols (OA) and black carbon (BC) – both co-emitted during a combustion event. Both constituents have significantly different optical properties owing to their formation mechanism. Further, they could exist in a variety of mixing states in the …