Barrett, The Honors College Thesis/Creative Project Collection
Barrett, The Honors College at Arizona State University proudly showcases the work of undergraduate honors students by sharing this collection exclusively with the ASU community.
Barrett accepts high performing, academically engaged undergraduate students and works with them in collaboration with all of the other academic units at Arizona State University. All Barrett students complete a thesis or creative project which is an opportunity to explore an intellectual interest and produce an original piece of scholarly research. The thesis or creative project is supervised and defended in front of a faculty committee. Students are able to engage with professors who are nationally recognized in their fields and committed to working with honors students. Completing a Barrett thesis or creative project is an opportunity for undergraduate honors students to contribute to the ASU academic community in a meaningful way.
Displaying 1 - 10 of 74
Description
An in-depth analysis on the effects vortex generators cause to the boundary layer separation that occurs when an internal flow passes through a diffuser is presented. By understanding the effects vortex generators demonstrate on the boundary layer, they can be utilized to improve the performance and efficiencies of diffusers and other internal flow applications. An experiment was constructed to acquire physical data that could assess the change in performance of the diffusers once vortex generators were applied. The experiment consisted of pushing air through rectangular diffusers with half angles of 10, 20, and 30 degrees. A velocity distribution model was created for each diffuser without the application of vortex generators before modeling the velocity distribution with the application of vortex generators. This allowed the two results to be directly compared to one another and the improvements to be quantified. This was completed by using the velocity distribution model to find the partial mass flow rate through the outer portion of the diffuser's cross-sectional area. The analysis concluded that the vortex generators noticeably increased the performance of the diffusers. This was best seen in the performance of the 30-degree diffuser. Initially the diffuser experienced airflow velocities near zero towards the edges. This led to 0.18% of the mass flow rate occurring in the outer one-fourth portion of the cross-sectional area. With the application of vortex generators, this percentage increased to 5.7%. The 20-degree diffuser improved from 2.5% to 7.9% of the total mass flow rate in the outer portion and the 10-degree diffuser improved from 11.9% to 19.2%. These results demonstrate an increase in performance by the addition of vortex generators while allowing the possibility for further investigation on improvement through the design and configuration of these vortex generators.
ContributorsSanchez, Zachary Daniel (Author) / Takahashi, Timothy (Thesis director) / Herrmann, Marcus (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / W.P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
This experiment used hotwire anemometry to examine the von Kármán vortex street and how different surface conditions affect the wake profile of circular airfoils, or bluff bodies. Specifically, this experiment investigated how the various surface conditions affected the shedding frequency and Strouhal Number of the vortex street as Reynolds Number is increased. The cylinders tested varied diameter, surface finish, and wire wrapping. Larger diameters corresponded with lower shedding frequencies, rougher surfaces decreased Strouhal Number, and the addition of thick wires to the surface of the cylinder completely disrupted the vortex shedding to the point where there was almost no dominant shedding frequency. For the smallest diameter cylinder tested, secondary dominant frequencies were observed, suggesting harmonics.
ContributorsCoote, Peter John (Author) / Takahashi, Timothy (Thesis director) / White, Daniel (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
The purpose of this paper is to discover what geometric characteristics of a wing and airfoil help to maximize leading edge suction through experimental testing. Three different stages of testing were conducted: a Proof of Concept, a Primary Experiment, and a Secondary Experiment. The Proof of Concept shows the effects of leading edge suction and the benefits it can posses. The Primary Experiment provided inconclusive data due to inaccuracies in the equipment. As a result, the Secondary Experiment was conducted in order to reduce the error effect as much as possible on the data. Unfortunately the Secondary Experiment provided inaccurate data as well. However, this paper does provide enough evidence to begin to question some of the long held beliefs regarding theoretical induced drag and whether it is true under all circumstances, or if it is only a good approximation for airfoils with full leading-edge suction effects.
ContributorsMorrow, Martin (Author) / Takahashi, Timothy (Thesis director) / Middleton, James (Committee member) / School for the Engineering of Matter, Transport, and Energy (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
Abstract "Empty Horizons": A Creative Writing Piece Max Harmon "Empty Horizons" is a creative writing piece composed of two different short stories sharing a common narrator. The first story "Can you dig it?" details a trip the narrator takes to South Dakota to go hunting shortly before starting college. On the trip the narrator contemplates certain aspects of his life and the events of the story serve as a vehicle to explore the narrator's mindset as an eighteen year old about to start a new phase in his life. The second story "Toads, Sharks and Beautiful Encounters with Uncertainty" takes place during the summer before the narrator begins his last semester in college as he attends the funeral of his recently deceased grandmother in Hawaii. During the trip to Hawaii, the narrator meets a girl his age and they are able to bond with each other over feelings of loss and uncertainty. In this story the narrator explores his feelings about life with college graduation on the horizon and comes to terms with some of the anxieties that have been plaguing him since the start of college. By detailing these two distinct and important time periods in the narrator's life the reader is able to gain a sense of understanding in regards to the narrator's own process of beginning life as an adult.
ContributorsHarmon, Max Doyle (Author) / Soares, Rebecca (Thesis director) / Popova, Laura (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor) / School of Historical, Philosophical and Religious Studies (Contributor)
Created2014-12
Description
A model has been developed to modify Euler-Bernoulli beam theory for wooden beams, using visible properties of wood knot-defects. Treating knots in a beam as a system of two ellipses that change the local bending stiffness has been shown to improve the fit of a theoretical beam displacement function to edge-line deflection data extracted from digital imagery of experimentally loaded beams. In addition, an Ellipse Logistic Model (ELM) has been proposed, using L1-regularized logistic regression, to predict the impact of a knot on the displacement of a beam. By classifying a knot as severely positive or negative, vs. mildly positive or negative, ELM can classify knots that lead to large changes to beam deflection, while not over-emphasizing knots that may not be a problem. Using ELM with a regression-fit Young's Modulus on three-point bending of Douglass Fir, it is possible estimate the effects a knot will have on the shape of the resulting displacement curve.
ContributorsSexton, Thurston Bryant (Author) / Takahashi, Timothy (Thesis director) / Jones, Donald (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / School of Mathematical and Statistical Sciences (Contributor) / School of Human Evolution and Social Change (Contributor)
Created2015-05
Description
Based on paradigms in feminist theory and criticism, I conduct an analysis of two iconic works of twentieth century American feminist literature. Examining Herland (1915) by Charlotte Perkins Gilman and Rubyfruit Jungle (1973) by Rita Mae Brown, I assess their place within the canon of feminist literature--a canon traditionally thought of as Western. I cyclically explore how this canon parallels movements and institutions in actual feminism, and where the pitfalls in both can be traced. Due to the large span of time betwixt the two novels, I engage the historical progression American women experienced in the twentieth century and pair it with the progress feminist literature was likewise experiencing. Exploring the consequences of depicting women as people rather than male counterparts or others, I analyze the roles of the male gaze, male-less spaces, utopias, construction of female identity, motherhood, and how these culminate in feminine and sexual liberation. Utilizing philosophy from Christine de Pizan’s The Book of the City of Ladies and Simone de Beauvoir’s The Second Sex, I trace the origins of the male gaze and male-less spaces in literature and film and how women are essentially othered. I further employ the criticism of Adrienne Rich’s essay “Compulsory Heterosexuality and Lesbian Existence” to explore the roles of motherhood and heterosexual norms specifically. My findings deride the authors for their inability to construct legitimately liberated female protagonists. However, I simultaneously offer deference to the authors for engaging the tools and concepts they had available to them at the time in the interest of crafting powerful feminist narratives. I center on the claim that male-less spaces are difficult to fully as well accurately portray in literature, but the authors attempt to do so to move towards a liberation of women and should be lauded for the contributions they made.
ContributorsMazzarella, Annie Lisa (Author) / Soares, Rebecca (Thesis director) / Glover, Richard (Committee member) / Department of English (Contributor) / School of Politics and Global Studies (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Paraprosdokian is a collection of stories about all different types of lives in Phoenix, AZ. There are several stories that work together, involving lonely teenagers at punk house shows, while the rest standalone: the eclectic interactions of a waiter at a 24-hour diner, a blind fair ride operator with a propensity for accidental murder, a hapless son of a clumsy dental assistant, a literary scholar stuck in an addiction to both Kafka and pornography, a kid who learns that writing is not a formula, and a high school death that nobody cares about. Some pieces unfold parts of 21st century culture that have been knotted in ambivalence, like how men raised on pornography reconcile with intimacy, while others are as simple as trying to encapsulate the experience of growing up in what is often perceived as an artless suburbia. The project aims at mixing prose with photography to create, as Ben Lerner describes it, “a constellation of language and image”—a complete artistic product. Using the work of a local Arizona photographer, the collection complicates a reader’s elementary notion of a “picture book” by forcing the reader to view photographs beyond exposition or symbolism. The title of the collection comes from a term used in comedic rhetoric that refers to a figure of speech in which the latter part of a statement or phrase reorients one’s understanding of the whole. Under this definition, the collection seeks to amend its author and reader’s orientation to Phoenix in a quest for empathy, giving pathetic characters a chance to speak without ever sacrificing a touch of humorous joy.
ContributorsFritz, Chandler Harrison (Author) / Soares, Rebecca (Thesis director) / Farmer, Steve (Committee member) / Department of English (Contributor) / School of Historical, Philosophical and Religious Studies (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
The thesis is an investigation on current regulations of commercial aircraft landing and take-off procedures and an analysis of potential weaknesses within the regulatory system for commercial aerospace. To determine such flaws, an area of worse-case scenarios with regard to the aforementioned flight operations was researched. The events selected to best-depict these scenarios where incidents of aircraft overrunning the runway, referred to as runway excursions. A case-study conducted of 44 federal investigations of runway excursions produced data indicating four influential factors within these incidents: weather, pilot error, instrument malfunction, and runway condition. Upon examination, all but pilot error appeared to have federal enforcement to diminish the occurrence of future incidents. This is a direct result of the broad possibilities that make up this factor. The study then searched for a consistent fault within the incidents with the results indicating an indirect relationship of thrust reversers, a technique utilized by pilots to provide additional braking, to these excursions. In cases of thrust reverser failure, pilots' over-reliance on the system lead to time being lost from the confusion produced by the malfunction, ultimately resulting in several different runway excursions. The legal implication with the situation is that current regulations are ambiguous on the subject of thrust reversers and thus do not properly model the usage of the technique. Thus, to observe the scope of danger this ambiguity presents to the industry, the relationship of the technique to commercial aerospace needed to be determined. Interviews were set-up with former commercial pilots to gather data related to the flight crew perspective. This data indicated that thrust reversers were actively utilized by pilots within the industry for landing operations. The problem with the current regulations was revealed that the lack of details on thrust reverser reflected a failure of regulations to model current industry flight operations. To improve safety within the industry, new data related to thrust reverser deployment must be developed and enforced to determine appropriate windows to utilize the technique, thus decreasing time lost in confusion that results from thrust reversers malfunction. Future work would be based on producing simulations to determine said data as well as proposing the policy suggestions produced by this thesis.
ContributorsCreighton, Andrew John (Author) / Takahashi, Timothy (Thesis director) / Marchant, Gary (Committee member) / Kimberly, Jimmy (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor) / School of Mathematical and Statistical Sciences (Contributor) / School of Politics and Global Studies (Contributor)
Created2014-05
Description
This study aims to showcase the results of a quadrotor model and the mathematical techniques used to arrive at the proposed design. Multicopters have made an explosive appearance in recent years by the controls engineering community because of their unique flight performance capabilities and potential for autonomy. The ultimate goal of this research is to design a robust control system that guides and tracks the quadrotor's trajectory, while responding to outside disturbances and obstacles that will realistically be encountered during flight. The first step is to accurately identify the physical system and attempt to replicate its behavior with a simulation that mimics the system's dynamics. This becomes quite a complex problem in itself because many realistic systems do not abide by simple, linear mathematical models, but rather nonlinear equations that are difficult to predict and are often numerically unstable. This paper explores the equations and assumptions used to create a model that attempts to match roll and pitch data collected from multiple test flights. This is done primarily in the frequency domain to match natural frequency locations, which can then be manipulated judiciously by altering certain parameters.
ContributorsDuensing, Jared Christopher (Author) / Takahashi, Timothy (Thesis director) / Garrett, Frederick (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)
Created2014-05
Description
It is a common assumption in the bicycle industry that stiffer frames generally perform better than flexible frames, because they transfer power more efficiently and absorb less energy from the rider's pedal stroke in the form of spring potential energy. However, in the last few years, Jan Heine of Bicycle Quarterly has developed an alternative theory, which he calls "planing", whereby a flexible frame can improve rider performance by not resisting the leg muscles as much, preventing premature muscle fatigue and allowing the rider to actually produce more consistent power, an effect which overwhelms any difference in power transfer between the different stiffness levels of frames. I performed several tests in which I measured the power input to the bicycle through the crankset and power output through a power-measuring trainer in the place of the rear hub. Heart rate data was collected along with most of these tests. Four bicycles were used with three distinct levels of stiffness. After performing several ANOVA tests to determine the effect of stiffness on the parameters of average power output during a sprint, maximum power output during a sprint, maximum heart rate during a sprint, difference between power-in and power-out during both sprints and longer efforts, and power quotient during a sprint, I found no effects of frame stiffness on any of these factors except power quotient. The finding for power quotient suggests a positive relationship between quotient and stiffness, which directly refutes the Planing Theory for the test riders and levels of stiffness represented in this test. Also, no statistically significant effect of stiffness on the difference between power-in and power-out was found, refuting the Power Transfer Theory for the riders and levels of stiffness represented in this test.
ContributorsSparks, Graham Philip (Author) / Takahashi, Timothy (Thesis director) / Middleton, James (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12