Central Vietnam and the communities located within the country experience a high level
of natural disaster due to flooding and typhoons. The mission of the U.S. Indo-Pacific Command
and the United States Army Corps of Engineers is to build new…
Central Vietnam and the communities located within the country experience a high level
of natural disaster due to flooding and typhoons. The mission of the U.S. Indo-Pacific Command
and the United States Army Corps of Engineers is to build new primary schools that have been
damaged due to flooding. The goal of this research is to find a viable solution for the powering of
each school, as many communities can’t handle the additional grid load of a fully functioning
school. In this research, two main methods were considered after brainstorming possible solutions.
First, the total usage of a typical school housing roughly 300 students and staff were calculated.
Then, monocrystalline photovoltaic cells were evaluated using given efficiencies, energy usage,
and incident shortwave radiation to calculate the total number of panels needed. Small scale wind
turbines were also considered, using power curves and a PDF of wind speeds in Ho Chi Minh City
for the year 2022, the amount of annual energy generated by turbines was calculated. It was found
that solar energy was a much more viable solution. The average price of solar was found to be
$19961.77 while the lowest price of wind turbines was $240000. With these high material costs,
not factoring in workers or maintenance cost, wind energy is clearly not viable. Instead, installing
a solar system on and around the school would be able to accomplish the requirements of the
school.
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This creative project details 5 engineers who made contributions to the ways that we live life today, yet have received little to no recognition for their efforts. The 5 engineers presented are Gottfried Wilhelm Leibniz, George Stephenson, Charles Babbage, David…
This creative project details 5 engineers who made contributions to the ways that we live life today, yet have received little to no recognition for their efforts. The 5 engineers presented are Gottfried Wilhelm Leibniz, George Stephenson, Charles Babbage, David Alter, and Nikola Tesla. Each engineer is detailed via a portrait and a biography that covers a little bit of their life and the contributions that they made.
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Perovskite films are the future of solar cell technology as they are not only low cost to produce and lightweight but also have a 26% conversion efficiency. This is extremely close to the standard silicon solar cell. The key challenge…
Perovskite films are the future of solar cell technology as they are not only low cost to produce and lightweight but also have a 26% conversion efficiency. This is extremely close to the standard silicon solar cell. The key challenge limiting the commercialization potential of these films is their fragility and durability to outdoors conditions. This project investigates the mechanical and material properties of these perovskite materials in order to understand their future manufacturing capabilities. Through the use of a spin coater, blade coater, and a double cantilever beam testing set up, the fracture energy (or toughness), Gc, of Perovskite films is determined. Understanding the properties of these films can help manufacturers determine how to best make durable films that can be used in everyday energy generation. Furthermore, this study offers strategies to improve the fracture energy of these films by adding polymers and food-additive starches to the recipe. The findings collected in this project present a technique to study the mechanical properties of perovskite-based solar technology and films and further aid the technology to become commercially viable.
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As part of NASA’s Artemis program, NASA intends to construct the Lunar Gateway space station in a near rectilinear halo orbit (NRHO) about the L2 Lagrange point of the Earth-Moon system in the near future. Gateway will help facilitate astronaut…
As part of NASA’s Artemis program, NASA intends to construct the Lunar Gateway space station in a near rectilinear halo orbit (NRHO) about the L2 Lagrange point of the Earth-Moon system in the near future. Gateway will help facilitate astronaut landings on the surface of the Moon and support numerous scientific endeavors. One of these scientific endeavors is FARSIDE. FARSIDE is a radio telescope array concept that will be deployed on the surface of the far side of the moon. Because of this, FARSIDE will require an orbiter, such as Gateway, to act as a communication relay to be able to communicate with ground stations on Earth. This thesis analyzes how the Lunar Gateway space station can assist FARSIDE with its communication with Earth and how unintentionally scattered radio signals from FARSIDE could affect the telescope’s astronomical observations. It provides insight into the optimal deployment latitude on the lunar surface for FARSIDE. The thesis first begins with a literature review of the circular restricted three body problem (CR3BP) and halo orbit calculations. This is followed by an analysis of an example halo orbit for the distance, elevation angle, and azimuth angle it has viewed from two possible sites for FARSIDE over one period of its trajectory. Using this same approach, an analysis of the Lunar Gateway’s NRHO trajectory over one year was performed along with an analysis of the scattered radio flux from ground stations on Earth and the flux leakage from Gateway. Three different possible deployment latitudes for FARSIDE were investigated: the equator, 30 degrees, and -30 degrees. The analysis in this thesis ultimately showed that a deployment latitude below the equator would be the preferable choice to maximize the visibility of Lunar Gateway from FARSIDE considering the geometry of the Lunar Gateway’s orbit.
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Dr. Ivan Ermanoski has been working towards creating a thermochemical reactor for the purposes of hydrogen production for several years. After testing the initial design, there were found to be several areas in which possible improvements could be made. It…
Dr. Ivan Ermanoski has been working towards creating a thermochemical reactor for the purposes of hydrogen production for several years. After testing the initial design, there were found to be several areas in which possible improvements could be made. It is the purpose of this thesis project to look over the shortcomings of the previous reactor design and make improvements. The primary focus of these improvements centers around increasing the heat retention of the reactor, with a secondary focus on improving the workability and ease of construction for the reactor.
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The objectives of this project are to design a statically determinant load cell mechanism for a prototype tow tank ultimately culminating in the testing of the aerodynamic performance of a Formula One racing car model. This paper also serves as…
The objectives of this project are to design a statically determinant load cell mechanism for a prototype tow tank ultimately culminating in the testing of the aerodynamic performance of a Formula One racing car model. This paper also serves as a proof of concept for force data collection for a full-sized tow tank being developed by Isabella All [8]. The project includes the design and construction of the load cell mechanism which utilizes a load cell to measure the force in a specific member of the mechanism which is then used to determine the semi-lift and drag forces for a given test model. For this specific project, a model of the front-end of an F1 racing car was used for data collection and analysis. It was found that for a short period of time within each test run, constant force data was able to be collected from the load cell which could then be transformed into semi-lift and drag force data. Ultimately, the drag coefficient acting on the model was found to be in the range of 0.9 to 1.3 which somewhat falls in line with the estimated values of 0.7 to 1.0 [1] for F1 racing vehicles. Although the final data collected may not be entirely accurate due to errors discussed in the paper, the ideas presented in this project can be fully realized with some minor changes and adjustments.
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This report describes the findings of an experiment designed to explore the nature of human hearing using binaural sound. The experiment also set out to determine a way to accurately find positional data from sound. Binaural recordings were made of…
This report describes the findings of an experiment designed to explore the nature of human hearing using binaural sound. The experiment also set out to determine a way to accurately find positional data from sound. Binaural recordings were made of high frequency sounds at various angles and the data was postprocessed to find the group delay and difference of intensity between the two channels. To do this, two methods were used. The first relied on manually analyzing the data by visually looking for the points of interest. The second method used a MATLAB program to scan the data for the points of interest by using a Fourier analysis. It was determined that while the first method has the potential to provide better results it is impractical and not representative of how human hearing works. The second method was far more efficient and demonstrated the reliance of human hearing on the difference of intensities. It was determined that through the use of the second method accurate positional data could be obtained by comparing the differences with experimental data.
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The objective of this report is to discover a skyhook’s ability to change the plane of another spacecraft’s orbit while ensuring that each vehicle’s orbital energy remains constant. Skyhooks are a proposed momentum exchange device in which a tether is…
The objective of this report is to discover a skyhook’s ability to change the plane of another spacecraft’s orbit while ensuring that each vehicle’s orbital energy remains constant. Skyhooks are a proposed momentum exchange device in which a tether is attached to a counterweight at one end and at the other, a capturing device intended to intercept rendezvousing spacecraft. Trigonometric velocity vector relations, along with objective comparisons to traditionally proposed uses for skyhooks and gravity-assist maneuvers were responsible for the ultimate parameterization of the proposed energy neutral maneuver. From this methodology, it was determined that a spacecraft’s initial relative velocity vector must be perpendicular to, and rotated about the skyhook’s total velocity vector if it is to benefit from an energy neutral plane change maneuver. A quaternion was used to model the rotation of the incoming spacecraft’s relative velocity vector. The potential post-maneuver spacecraft orbits vary in their inclinations depending on the ratio between the skyhook and spacecraft’s total velocities at the point of rendezvous as defined by the parameter called the alpha criterion. For many cases, the proposed maneuver will serve as a desirable alternative to currently practiced propulsive plane change methods because it does not costly require a substantial amount of propellant. The proposed maneuver is also more accessible than alternative methods that involve gravity-assist and aerodynamic forces. Additionally, by avoiding orbital degradation through the achievement of unchanging total orbital energy, the skyhook will be able to continually and self-sustainably provide plane changes to any spacecraft that belong to orbits that abide by the identified parameters.
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As a result of the increase of pollution related to industrialization in Vietnam, acid rain has become a prevalent issue for Vietnamese farmers who are forced to rinse their crops – risking damage due to overwatering and poor harvest. Thus,…
As a result of the increase of pollution related to industrialization in Vietnam, acid rain has become a prevalent issue for Vietnamese farmers who are forced to rinse their crops – risking damage due to overwatering and poor harvest. Thus, the team was motivated to develop a solution to harmful impacts of acidic rainwater by creating a system with the ability to capture rainwater and determine its level of acidity in order to optimize the crop watering process, and promote productive crops. By conducting preliminary research on rainfall and tropical climate in Vietnam, existing products on the market, and pH sensors for monitoring and device material, the team was able to design a number of devices to collect, store, and measure the pH of rainwater. After developing a number of initial design requirements based on the needs of the farmers, a final prototype was developed using the best aspects of each initial design. Tests were conducted with varying structural and aqueous materials to represent a broad range of environmental conditions. While the scope of the project was ultimately limited to prototyping purposes, the principles explored throughout this thesis project can successfully be applied to a fully-functioning production model available for commercial use on Vietnamese farms. Given more time for development, improvements would be made in the extent of materials tested, and the configuration of electronics and data acquisition, in order to further optimize the process of determining rainwater acidity.
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