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- Creators: Barrett, The Honors College
Description
The vastly growing field of supercomputing is in dire need of a new measurement system to optimize JMRAM (Josephson junction magnetoresistive random access memory) devices. To effectively measure these devices, an ultra-low-noise, low cost cryogenic dipping probe with a dynamic voltage range is required. This dipping probe has been designed by ASU with <100 nVp-p noise, <10 nV offsets, 10 pV to 16 mV voltage range, and negligible thermoelectric drift. There is currently no other research group or company that can currently match both these low noise levels and wide voltage range. Two different dipping probes can be created with these specifications: one for high-use applications and one for low-use applications. The only difference between these probes is the outer shell; the high-use application probe has a shell made of G-10 fiberglass for a higher price, and the low-use application probe has a shell made of AISI 310 steel for a lower price. Both types of probes can be assembled in less than 8 hours for less than $2,500, requiring only soldering expertise. The low cost and short time to create these probes makes wide profit margins possible. The market for these cryogenic dipping probes is currently untapped, as most research groups and companies that use these probes build their own, which allows for rapid business growth. These potential consumers can be easily reached by marketing these probes at superconducting conferences. After several years of selling >50 probes, mass production can easily become possible by hiring several technicians, and still maintaining wide profit margins.
ContributorsHudson, Brooke Ashley (Author) / Adams, James (Thesis director) / Anwar, Shahriar (Committee member) / Materials Science and Engineering Program (Contributor) / W. P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
Although wind turbine bearings are designed to operate 18-20 years, in the recent years premature failure among these bearings has caused this life to reduce to as low as a few months to a year. One of the leading causes of premature failure called white structure flaking is a mechanism that was first cited in literature decades ago but not much is understood about it even today. The cause of this mode of failure results from the initiation of white etched cracks (WECs). In this report, different failure mechanisms, especially premature failure mechanisms that were tested and analyzed are demonstrated as a pathway to understanding this phenomenon. Through the use of various tribometers, samples were tested in diverse and extreme conditions in order to study the effect of these different operational conditions on the specimen. Analysis of the tested samples allowed for a comparison of the microstructure alterations in the tested samples to the field bearings affected by WSF.
ContributorsSharma, Aman (Author) / Foy, Joseph (Thesis director) / Adams, James (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)
Created2015-05
Description
While studying in Japan, I became fascinated by the variety shows my roommates would watch. These shows featured a flexible format with comedians and other entertainers participating in a wide variety of activities. For my senior creative project, I decided to determine what features were essential to Japanese variety shows, and to then use these features to create my own program.
In order to determine the essential features of Japanese variety television, I watched a total of 22 episodes of three popular Japanese variety shows: Gaki no tsukai ya arahende (ダウンタウンのガキの使いやあらへんで! Usually abbreviated as ガキの使い), London Hearts (ロンドンハーツ), and Utaban (うたばん). I chose these three shows because of their differing styles, popular comedic hosts, and impressive longevity, with a combined 58 years of runtime. Through my research, I was able to assemble the analyses of basic and technical features found in the next section of this document in addition to several pages of my own notes used to design my original program.
My own program, American Joke (アメリカンジョーク), is meant to be filmed in America featuring an entirely Japanese cast. The main idea of the show is to capitalize on the comedic potential of cultural differences by having Japanese comedians interact with American people and traditions.
In order to showcase the show, I filmed a short “sizzle reel” video featuring Japanese exchange students as the cast. Segments filmed included our “comedians” learning the high jump from ASU track athletes, bringing Japanese fermented soybeans to campus for American students to taste, and participating in an American-themed quiz show.
In order to determine the essential features of Japanese variety television, I watched a total of 22 episodes of three popular Japanese variety shows: Gaki no tsukai ya arahende (ダウンタウンのガキの使いやあらへんで! Usually abbreviated as ガキの使い), London Hearts (ロンドンハーツ), and Utaban (うたばん). I chose these three shows because of their differing styles, popular comedic hosts, and impressive longevity, with a combined 58 years of runtime. Through my research, I was able to assemble the analyses of basic and technical features found in the next section of this document in addition to several pages of my own notes used to design my original program.
My own program, American Joke (アメリカンジョーク), is meant to be filmed in America featuring an entirely Japanese cast. The main idea of the show is to capitalize on the comedic potential of cultural differences by having Japanese comedians interact with American people and traditions.
In order to showcase the show, I filmed a short “sizzle reel” video featuring Japanese exchange students as the cast. Segments filmed included our “comedians” learning the high jump from ASU track athletes, bringing Japanese fermented soybeans to campus for American students to taste, and participating in an American-themed quiz show.
ContributorsAmkraut, Elliott R. (Author) / Chambers, Anthony (Thesis director) / Wilson, Bradley (Committee member) / Maday, Gregory (Committee member) / Barrett, The Honors College (Contributor) / Department of Economics (Contributor) / School of International Letters and Cultures (Contributor)
Created2014-05
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
The following is a report that will evaluate the microstructure of the nickel-based superalloy Hastelloy X and its relationship to mechanical properties in different load conditions. Hastelloy X is of interest to the company AORA because its strength and oxidation resistance at high temperatures is directly applicable to their needs in a hybrid concentrated solar module. The literature review shows that the microstructure will produce different carbides at various temperatures, which can be beneficial to the strength of the alloy. These precipitates are found along the grain boundaries and act as pins that limit dislocation flow, as well as grain boundary sliding, and improve the rupture strength of the material. Over time, harmful precipitates form which counteract the strengthening effect of the carbides and reduce rupture strength, leading to failure. A combination of indentation and microstructure mapping was used in an effort to link local mechanical behavior to microstructure variability. Electron backscatter diffraction (EBSD) and energy dispersive spectroscopy (EDS) were initially used as a means to characterize the microstructure prior to testing. Then, a series of room temperature Vickers hardness tests at 50 and 500 gram-force were used to evaluate the variation in the local response as a function of indentation size. The room temperature study concluded that both the hardness and standard deviation increased at lower loads, which is consistent with the grain size distribution seen in the microstructure scan. The material was then subjected to high temperature spherical indentation. Load-displacement curves were essential in evaluating the decrease in strength of the material with increasing temperature. Through linear regression of the unloading portion of the curve, the plastic deformation was determined and compared at different temperatures as a qualitative method to evaluate local strength.
ContributorsCelaya, Andrew Jose (Author) / Peralta, Pedro (Thesis director) / Solanki, Kiran (Committee member) / Barrett, The Honors College (Contributor) / Mechanical and Aerospace Engineering Program (Contributor)
Created2015-05
Description
In my thesis paper, I examine the gothic elements found in classical gothic fairy tales from European and Japanese tradition, particularly those works by the Brothers Grimm and Yei Theodora Ozaki. By examining the principle gothic elements that are unique to both stories, and further analyzing the commonalities of story, plot, and other major tropes, a better understanding of the message meant to be imparted and other cultural nuances can be ascertained. Gothic literature creates an atmosphere of gloom and suspense, toying with concepts of dread and darkness by employing Gothic elements such as shadows, the supernatural, sinister buildings, and strong-willed villains, all of which affect the rational mind in an irrational way. Fairytales freely use such tropes to their advantage, playing with the many fears of children, while simultaneously painting an idealistic fantasy world. The degree of usage and the application of gothic elements is closely examined in the Grimm works, "Hansel and Gretel," and "The Robber Bridegroom," as well as the Japanese tales, "The Goblin of Adachigahra,""Kintaro the Golden Boy" and "The Monkey and the Crab." These stories have been chosen due for their usage of animal tricksters, themes of control, and aspects of isolation, supernatural entities, and substantial gothic imagery. The gothic elements of death, sinister older women, the supernatural, fears of abandonment, and cunning animals are akin to both Western and Eastern tales, while the concept of gothic setting and the type of monsters prepared to feast on men is significantly different for both cultures, similar lessons are intended to be gleaned by children from these tales, with the intention of generally producing positive results \u2014 while the means differ, the message is strikingly similar, yet there remain cultural differences in terms of central themes and character traits.The effect of re-introducing the darker, gothic elements of traditional fairy tales into modern literature and retellings of the original narratives has been profound.Today, whether it has been at the bequest of the public or simply a new-age movement by modern cinema audience for the "gritty and realistic," fairy tales are returning to their former gothic forms. "Snow White and The Huntsman" is one example of a film which has gone this route, opting for a more gothic, classic telling rather than the chip, cheery, rosy cheeked Disney versions. There is a tendency for most media nowadays to be far less censored and fantastical, aiming for a more realistic, grittier approach \u2014 this bleeds into film and literature likewise, and thus children are impacted by this shift as well. Children seem to be able to handle more, perhaps desensitized at younger and younger ages by the products of our widely consumerist society, or perhaps due to parents raising their children in such a way so that the darkness that tinges these tales doesn't disturb and derail but rather, emphasizes their meaning of teaching certain lessons. Tales such as these are still valuable, and will continue to be so long as we seek a reality greater than our own, where the evil of the world is wiped away, and we all live happily ever after.
ContributorsMoschonas, Jerasimos Theodore (Author) / Ellis, Lawrence (Thesis director) / Hoyt, Heather (Committee member) / Barrett, The Honors College (Contributor) / Department of English (Contributor)
Created2015-05
Description
The transition to lead-free solder in the electronics industry has benefited the environment in many ways. However, with new materials systems comes new materials issues. During the processing of copper pads, a protective surface treatment is needed to prevent the copper from oxidizing. Characterizing the copper oxidation underneath the surface treatment is challenging but necessary for product reliability and failure analysis. Currently, FIB-SEM, which is time-consuming and expensive, is what is used to understand and analyze the surface treatment-copper oxide(s)-copper system. This project's goals were to determine a characterization methodology that cuts both characterization time and cost in half for characterizing copper oxidation beneath a surface treatment and to determine which protective surface treatment is the best as defined by multiple criterion such as cost, sustainability, and reliability. Two protective surface treatments, organic solderability preservative (OSP) and chromium zincate, were investigated, and multiple characterization techniques were researched. Six techniques were tested, and three were deemed promising. Through our studies, it was determined that the best surface treatment was organic solderability preservative (OSP) and the ideal characterization methodology would be using FIB-SEM to calibrate a QCM model, along with using SERA to confirm the QCM model results. The methodology we propose would result in a 91% reduction in characterization cost and a 92% reduction in characterization time. Future work includes further calibration of the QCM model using more FIB/SEM data points and eventually creating a model for oxide layer thickness as a function of exposure time and processing temperature using QCM as the primary data source. An additional short essay on the role of SEM on the continuing miniaturization of integrated circuits is included at the end. This paper explores the intertwined histories of the scanning electron microscope and the integrated circuit, highlighting how advances in SEM influence integrated circuit advances.
ContributorsSmith, Bethany Blair (Co-author) / Marion, Branch Kelly (Co-author) / Cruz, Hernandez (Co-author) / Kimberly, McGuiness (Co-author) / Adams, James (Thesis director) / Krause, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Materials Science and Engineering Program (Contributor)
Created2015-05
Description
In the current age, with media influence spreading through the entire world, formerly isolated regions and gated cultures became interconnected. With this globalization of culture came the communion between Japanese and Western media, especially animation and comics. Morality is often exemplified by heroes within a particular culture as figures for audiences to admire and draw values from, which can be a useful representation of that society's particular standards. The cultures' portrayal of heroism and morality through characterization and plot structure are emblematic not only of their original culture, but the new age of globalization as concepts previously considered unique to one region soon blended together through the world. From the Western "Hero's Journey" style mythos to the Japanese anime and manga heroes of the modern decades, we can see the growth and impact of globalization which caused new blends of portrayals and themes in revolutionary ways. The roots of the differences were found through research of popular culture and history of Japanese animation and Western comic books. Iconic Western comic book heroes such as Superman, Batman, and Wolverine are analyzed, followed by analysis and comparison to the Japanese parallel of the Japanese hero, specifically within Hirohiko Araki's acclaimed Jojo's Bizarre Adventure anime and manga franchise. Finally, the popular animated Western cartoon Avatar: The Last Airbender, known for its vast Eastern influence, meet the two worlds in the middle and epitomize the globalization of this concept of a hero's narrative. The purpose of this analysis is to understand the dynamics of cultural influence and cultural specificity, elucidating some stereotypes in contemporary culture brought by misconceptions and traditions in order to promote cross-cultural understanding.
ContributorsNguyen, Hau Trung (Author) / Wise, John MacGregor (Thesis director) / Wilson, Bradley (Committee member) / Harrington Bioengineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Widespread knowledge of fracture mechanics is mostly based on previous models that generalize crack growth in materials over several loading cycles. The objective of this project is to characterize crack growth that occurs in titanium alloys, specifically Grade 5 Ti-6Al-4V, at the sub-cycle scale, or within a single loading cycle. Using scanning electron microscopy (SEM), imaging analysis is performed to observe crack behavior at ten loading steps throughout the loading and unloading paths. Analysis involves measuring the incremental crack growth and crack tip opening displacement (CTOD) of specimens at loading ratios of 0.1, 0.3, and 0.5. This report defines the relationship between crack growth and the stress intensity factor, K, of the specimens, as well as the relationship between the R-ratio and stress opening level. The crack closure phenomena and effect of microcracks are discussed as they influence the crack growth behavior. This method has previously been used to characterize crack growth in Al 7075-T6. The results for Ti-6Al-4V are compared to these previous findings in order to strengthen conclusions about crack growth behavior.
ContributorsNazareno, Alyssa Noelle (Author) / Liu, Yongming (Thesis director) / Jiao, Yang (Committee member) / Mechanical and Aerospace Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
"Baba Aruki: A Walk Down Baba Lane" will introduce the reader to scenes from my study abroad at Waseda University in Tokyo, Japan. The reader will experience the whirlwind nature of study abroad, the complexity of Japanese culture, and vicarious nostalgia for a place, time, and group of people now far removed from my daily life. I invite you to join me on this journey into my time in a different world. (Please note: turn on "comments" in the pdf file.)
ContributorsEvans, Rebecca Constance (Author) / Wong, Elizabeth (Thesis director) / Hunter, Joel (Committee member) / Scott Lynch, Jacquelyn (Committee member) / Barrett, The Honors College (Contributor) / School of International Letters and Cultures (Contributor)
Created2013-05