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- Creators: Arizona State University
- Creators: Chakraborty, Bijeta
- Member of: ASU Electronic Theses and Dissertations
Description
Educed Play is a performance installation that investigates spontaneity and the invisible communication that can exist in improvisation and collaborative play. The work unites the mediums of dance, drawing, music, and video through improvisational performances. The multimedia installation entitled Educed Play was presented in the fall of 2012. Inspiration came from the idea of relics created by ephemeral interactions, using improvisation as a means to performance, and working within a genuine collaboration. This document encompasses an overview of the project.
ContributorsLing, Amanda (Author) / Kaplan, Robert (Thesis advisor) / Standley, Eileen (Committee member) / Pittsley, Janice (Committee member) / Arizona State University (Publisher)
Created2013
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
Do emotions help explain our behaviors? Can they condemn us, excuse us, orr mitigate our moral responsibility orr blameworthiness? Can they explain our rationality and irrationality, orr warrant such attributions? Can they be justified orr warranted? Are they constitutive aspects of our consciousness, identity, characters, virtues, orr epistemic status? The answer to these questions, at least to a significant extent, depends on what emotions are. This illustrates the importance of what emotions are to academics across multiple disciplines, as well as to members of governing bodies, organizations, communities, and groups. Given the great importance of emotions to various aspects of our lives, this dissertation is about the relevance of the topic of emotion as an area of study for the discipline of philosophy. This dissertation is also broadly about the need to bridge the interests, concerns, and collective bodies of knowledge between various distinct disciplines, thereby contributing to the process of unifying knowledge across the various disciplines within the realm of academia.
The primary aim in this dissertation is to initiate the unification of the interests, concerns, and collective bodies of knowledge across disciplines of academia. To do so, however, this dissertation aims to bridge some disciplinary divides between the disciplines of philosophy and psychology. I fulfill this aim by first demonstrating that interdisciplinary research and theorizing is needed within the disciplines of philosophy and psychology. I do this by considering how the problem of skepticism arises within these two disciplines. I also derive, propose, and argue for the acceptance of a new foundation for academic research and theorizing in response to the problem of skepticism. I refer to my proposal, in general, as The Proposal for Unification without Consilience (UC).
The primary aim in this dissertation is to initiate the unification of the interests, concerns, and collective bodies of knowledge across disciplines of academia. To do so, however, this dissertation aims to bridge some disciplinary divides between the disciplines of philosophy and psychology. I fulfill this aim by first demonstrating that interdisciplinary research and theorizing is needed within the disciplines of philosophy and psychology. I do this by considering how the problem of skepticism arises within these two disciplines. I also derive, propose, and argue for the acceptance of a new foundation for academic research and theorizing in response to the problem of skepticism. I refer to my proposal, in general, as The Proposal for Unification without Consilience (UC).
ContributorsMun, Cecilea (Author) / Calhoun, Cheshire (Thesis advisor) / Kobes, Bernard (Committee member) / Shiota, Michelle (Committee member) / Arizona State University (Publisher)
Created2014
Description
By studying of a piece of music paired with specific artwork from the time and place of its composition, one can learn more about the character and artistic merits of both the art and music, as well as their relationship to the culture in which they were created. It is the purpose of this paper to examine one specific idea within this vein of interdisciplinary study. This study explores the presentation of American visual art from the 1920s alongside Dupré's Variations sur un Noël, Op. 20. This correlation provides a platform for deeper insight into the composition. The sights and sounds of America that Dupré observed while composing his variation set, captured in artwork from that period, illustrate some of the unique and distinguishing features of the musical work. This study also explores the history and culture around music and art in the 1920's, as well as some of the existing research on the relationship between music and visual art.
ContributorsSnavley, Ashley Nicole (Author) / Marshall, Kimberlt (Thesis advisor) / Rogers, Rodney (Committee member) / Ryan, Russell (Committee member) / Arizona State University (Publisher)
Created2014
Description
Stroke is a leading cause of disability with varying effects across stroke survivors necessitating comprehensive approaches to rehabilitation. Interactive neurorehabilitation (INR) systems represent promising technological solutions that can provide an array of sensing, feedback and analysis tools which hold the potential to maximize clinical therapy as well as extend therapy to the home. Currently, there are a variety of approaches to INR design, which coupled with minimal large-scale clinical data, has led to a lack of cohesion in INR design. INR design presents an inherently complex space as these systems have multiple users including stroke survivors, therapists and designers, each with their own user experience needs. This dissertation proposes that comprehensive INR design, which can address this complex user space, requires and benefits from the application of interdisciplinary research that spans motor learning and interactive learning. A methodology for integrated and iterative design approaches to INR task experience, assessment, hardware, software and interactive training protocol design is proposed within the comprehensive example of design and implementation of a mixed reality rehabilitation system for minimally supervised environments. This system was tested with eight stroke survivors who showed promising results in both functional and movement quality improvement. The results of testing the system with stroke survivors as well as observing user experiences will be presented along with suggested improvements to the proposed design methodology. This integrative design methodology is proposed to have benefit for not only comprehensive INR design but also complex interactive system design in general.
ContributorsBaran, Michael (Author) / Rikakis, Thanassis (Thesis advisor) / Olson, Loren (Thesis advisor) / Wolf, Steven L. (Committee member) / Ingalls, Todd (Committee member) / Arizona State University (Publisher)
Created2014
Description
Class D Amplifiers are widely used in portable systems such as mobile phones to achieve high efficiency. The demands of portable electronics for low power consumption to extend battery life and reduce heat dissipation mandate efficient, high-performance audio amplifiers. The high efficiency of Class D amplifiers (CDAs) makes them particularly attractive for portable applications. The Digital class D amplifier is an interesting solution to increase the efficiency of embedded systems. However, this solution is not good enough in terms of PWM stage linearity and power supply rejection. An efficient control is needed to correct the error sources in order to get a high fidelity sound quality in the whole audio range of frequencies. A fundamental analysis on various error sources due to non idealities in the power stage have been discussed here with key focus on Power supply perturbations driving the Power stage of a Class D Audio Amplifier. Two types of closed loop Digital Class D architecture for PSRR improvement have been proposed and modeled. Double sided uniform sampling modulation has been used. One of the architecture uses feedback around the power stage and the second architecture uses feedback into digital domain. Simulation & experimental results confirm that the closed loop PSRR & PS-IMD improve by around 30-40 dB and 25 dB respectively.
ContributorsChakraborty, Bijeta (Author) / Bakkaloglu, Bertan (Thesis advisor) / Garrity, Douglas (Committee member) / Ozev, Sule (Committee member) / Arizona State University (Publisher)
Created2012
Description
No Doors: A Personal Exploration of Movement and Technology, details the interdisciplinary strategies that were used in the making of a series of interactive/reactive/immersive (IRI) installations that drew audiences into an experience and encouraged active observation and/or participation. The interdisciplinary IRI installations described in this document combined movement, sculpture, production design, and various forms of media and technology with environments in which participants had agency. In the process of developing this work, the artist considered several concepts and practices: site-specific, various technologies, real-time processing, participant experience, embodied exploration, and hidden activity. Throughout the creative process, the researcher conducted a series of four focus labs in which a small audience was invited to engage with the work as a way of gathering data about the effectiveness of the installations in facilitating active audience observation and/or participation. The data collected after each focus lab informed the revision of the work in preparation for the next focus lab, with the ultimate result being the production of a final exhibition of five interdisciplinary IRI installations. The installations detailed in this document were loosely based on five elements: water, fire, air, earth, and spirit.
ContributorsMcCaman, Sharon (Author) / Schupp, Karen (Thesis advisor) / Rajko, Jessica (Committee member) / Pinholster, Jacob (Committee member) / Tinapple, David (Committee member) / Arizona State University (Publisher)
Created2018
Description
There has been a growing emphasis on the education of future generations of engineers who will have to tackle complex, global issues that are sociotechnical in nature. The National Science Foundation invests millions of dollars in interdisciplinary engineering education research (EER) to create an innovative and inclusive culture aimed at radical change in the engineering education system. This exploratory research sought to better understand ways of thinking to address complex educational challenges, specifically, in the context of engineering-social sciences collaborations. The mixed methods inquiry drew on the ways of thinking perspectives from sustainability education to adapt futures, values, systems, and strategic thinking to the context of EER. Using the adapted framework, nine engineer-social scientist dyads were interviewed to empirically understand conceptualizations and applications of futures, values, systems, and strategic thinking. The qualitative results informed an original survey instrument, which was distributed to a sample of 310 researchers nationwide. Valid responses (n = 111) were analyzed to uncover the number and nature of factors underlying the scales of futures, values, systems, and strategic thinking. Findings illustrate the correlated, multidimensional nature of ways of thinking. Results from the qualitative and quantitative phases were also analyzed together to make recommendations for policy, teaching, research, and future collaborations. The current research suggested that ways of thinking, while perceived as a concept in theory, can and should be used in practice. Futures, values, systems, and strategic thinking, when used in conjunction could be an important tool for researchers to frame decisions regarding engineering education problem/solution constellations.
ContributorsDalal, Medha (Author) / Archambault, Leanna M (Thesis advisor) / Carberry, Adam (Committee member) / Savenye, Wilhelmina (Committee member) / Arizona State University (Publisher)
Created2019
Description
This study examined discussion forum posts within a website dedicated to a medium and genre of music (chiptunes) with potential for music-centered making, a phrase I use to describe maker culture practices that revolve around music-related purposes. Three research questions guided this study: (1) What chiptune-related practices did members of chipmusic.org discuss between December 30th, 2009 and November 13th, 2017? (2) What do chipmusic.org discussion forum posts reveal about the multidisciplinary aspects of chiptunes? (3) What import might music-centered making evident within chipmusic.org discussion forum posts hold for music education? To address these research questions, I engaged in corpus-assisted discourse analysis tools and techniques to reveal and analyze patterns of discourse within 245,098 discussion forum posts within chipmusic.org. The analysis cycle consisted of (a) using corpus analysis techniques to reveal patterns of discourse across and within data consisting of 10,892,645 words, and (b) using discourse analysis techniques for a close reading of revealed patterns.
Findings revealed seven interconnected themes of chiptune-related practices: (a) composition practices, (b) performance practices, (c) maker practices, (d) coding practices, (e) entrepreneurial practices, (f), visual art practices, and (g) community practices. Members of chipmusic.org primarily discussed composing and performing chiptunes on a variety of instruments, as well as through retro computer and video game hardware. Members also discussed modifying and creating hardware and software for a multitude of electronic devices. Some members engaged in entrepreneurial practices to promote, sell, buy, and trade with other members. Throughout each of the revealed themes, members engaged in visual art practices, as well as community practices such as collective learning, collaborating, constructive criticism, competitive events, and collective efficacy.
Findings suggest the revealed themes incorporated practices from a multitude of academic disciplines or fields of study for music-related purposes. However, I argue that many of the music-related practices people discussed within chipmusic.org are not apparent within music education discourse, curricula, or standards. I call for an expansion of music education discourse and practices to include additional ways of being musical through practices that might borrow from multiple academic disciplines or fields of study for music-related purposes.
Findings revealed seven interconnected themes of chiptune-related practices: (a) composition practices, (b) performance practices, (c) maker practices, (d) coding practices, (e) entrepreneurial practices, (f), visual art practices, and (g) community practices. Members of chipmusic.org primarily discussed composing and performing chiptunes on a variety of instruments, as well as through retro computer and video game hardware. Members also discussed modifying and creating hardware and software for a multitude of electronic devices. Some members engaged in entrepreneurial practices to promote, sell, buy, and trade with other members. Throughout each of the revealed themes, members engaged in visual art practices, as well as community practices such as collective learning, collaborating, constructive criticism, competitive events, and collective efficacy.
Findings suggest the revealed themes incorporated practices from a multitude of academic disciplines or fields of study for music-related purposes. However, I argue that many of the music-related practices people discussed within chipmusic.org are not apparent within music education discourse, curricula, or standards. I call for an expansion of music education discourse and practices to include additional ways of being musical through practices that might borrow from multiple academic disciplines or fields of study for music-related purposes.
ContributorsO'Leary, Jared Duane (Author) / Mantie, Roger A (Thesis advisor) / Tobias, Evan S (Thesis advisor) / Schmidt, Margaret (Committee member) / Stauffer, Sandra (Committee member) / Thompson, Jason (Committee member) / Arizona State University (Publisher)
Created2018
Description
In this thesis, a digital input class D audio amplifier system which has the ability
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
ContributorsBai, Jing (Author) / Bakkaloglu, Bertan (Thesis advisor) / Arizona State University (Publisher)
Created2015