Master of Arts, The Ohio State University, 1973, Graduate School

Committee: Not Provided (Other) Subjects:

Master of Arts, The Ohio State University, 1962, Graduate School

Committee: Not Provided (Other) Subjects:

Master of Arts, The Ohio State University, 1960, Graduate School

Committee: Not Provided (Other) Subjects:

Master of Arts, The Ohio State University, 1960, Graduate School

Committee: Not Provided (Other) Subjects:

Master of Arts, The Ohio State University, 1960, Graduate School

Committee: Not Provided (Other) Subjects:

Master of Science in Mechanical Engineering (MSME), Wright State University, 2024, Mechanical Engineering

Swift Heavy Ions (SHI) irradiation, characterized by high kinetic energy ions, induces significant material/structural modification, e.g., latent track. However, the intricate interaction among various physics, i.e., mechanical stress, phase transition, and heat transfer, has been ignored in the continuum-based approaches in favor of simplicity. Here, we developed a two-dimensional coupled phase-field inelastic-thermal spike (PF-iTS) model to investigate the effect of thermal crosstalk, elastic energy, and irradiation flux on latent track formation. A particular focus is placed on investigating the influence of internal mechanical stress on latent track formation. Simulation results reveal a shift in critical stopping energy and a reduction in track radius in the presence of mechanical stress, indicating a suppressive effect on latent track formation. Furthermore, the paper explores the effects of ion flux and simultaneous versus delayed ion collisions on track morphology. Simulations demonstrate how thermal cross-talk between simultaneous incidents can alter track dimensions, with closer incidents resulting in larger track radii due to temperature field overlap. The results reveal a shift in the critical electronic stopping energy and a reduced track radius under mechanical stress. Additionally, the study demonstrates the impact of thermal crosstalk between incidents, i.e., simultaneous and delayed double ion impacts, showing potential track merging and variations in track morphology.

Committee: Hamed Attariani Ph.D. (Advisor); Henry D. Young Ph.D. (Committee Member); Sheng Li Ph.D. (Committee Member) Subjects: Materials Science; Mechanical Engineering; Nuclear Engineering

Doctor of Philosophy (PhD), Ohio University, 2024, Mathematics (Arts and Sciences)

The Lyapunov stability of equilibria in dynamical systems is determined by the interplay between the linearization and the nonlinear terms. In this work, we study the case when the spectrum of the linearization is diffusively stable with high-order spectral degeneracy at the origin. In particular, spatially periodic solutions called roll solutions at the zigzag boundary of the Swift-Hohenberg equation (SHE), typically selected by patterns and defects in numerical simulations, are shown to be nonlinearly stable. This also serves as an example where linear decay weaker than classical diffusive decay, together with quadratic nonlinearity, still gives nonlinear stability of spatially periodic patterns. The study is conducted on two physical domains: the 2D plane, $\R^2$, and the cylinder, $T_{2\pi}\times \R$. Linear analysis reveals that instead of the classical $t^{-1}$ diffusive decay rate, small localized perturbation of roll solutions with zigzag wavenumbers decay with slower algebraic rates ($t^{-\frac{3}{4}}$ for the 2D plane; $t^{-\frac{1}{4}}$ for the cylindrical domain) due to the high order degeneracy of the translational mode at the origin of the Bloch-Fourier spaces. The nonlinear stability proofs are based on decompositions of the neutral translational mode and the faster decaying modes, and fixed-point arguments, demonstrating the irrelevancy of the nonlinear terms.

Committee: Qiliang Wu (Advisor); Alexander Neiman (Committee Member); Todd Young (Committee Member); Tatiana Savin (Committee Member) Subjects: Mathematics

Doctor of Philosophy (Ph.D.), University of Dayton, 2021, Electro-Optics

Mode-locked oscillators are the building blocks to generate ultrafast pulses which can then be used for many applications, including optical communication, metrology, spectroscopy, microscopy, material processing, as well as many applications in the healthcare industry. Mode-locked fiber oscillators are especially popular for their compactness, efficiency, and beam quality compared to their solid-state counterparts such as Ti: Sapphire lasers. Apart from their practicality, the mode-locked fiber lasers are an interesting object for studies, as they represent dynamically rich nonlinear systems. For ultrafast fiber oscillators at normal dispersion, a spectral filter is the utmost important optical component that determines the behavior of these systems in terms of the spectral bandwidth, pulse duration, central wavelength of the output spectra, multipulse dynamics, pulse structure as well as pulse velocity. Recently, there is a growing interest in fiber based spectral filters as they facilitate the construction of all-fiber laser cavities. This dissertation investigates the laser performance parameters by developing an all-fiber spectral filter and exploiting its characteristics. Especially, this dissertation reports the first experimental observation of dissipative solitons of the complex Swift Hohenberg equation. This is very important as it births multiple future projects related to implementing higher order spectral filtering in mode-locked fiber lasers. Although most of the ultrafast oscillators in this dissertation are built at 1 μm, ideas to build mode-locked lasers at visible wavelengths are also presented along with primary numerical simulation and experimental results. Finally, all the upcoming research directions are discussed in detail.

Committee: Andy Chong Ph.D. (Committee Chair); Andrew Sarangan Ph.D. (Committee Member); Todd Smith Ph.D. (Committee Member); Imad Agha Ph.D. (Committee Member) Subjects: Electrical Engineering; Engineering; Optics; Physics

Bachelor of Arts, Wittenberg University, 2020, English

Jonathan Swift's travel narrative, Gulliver's Travels, addresses a middle-class Englishman sailing around the world and encountering new populations with unique features. Published in 1726, when British colonization was rampant, Swift's story confronts the effects of colonization on previously untouched civilizations. This paper touches on two of Gulliver's journeys, to Brobdingnag and to the land of the Houyhnhnms. Citing the works of Aime Cesaire and Homi Baba, two prominent scholars in the field of post-colonial theory, this paper examines how colonization harms the parties involved, both those who are colonizing and those who have been colonized. Countering the contemporary view that colonization would benefit any civilization that receives contact, the paper notes how it rather leaves destruction in its course.

Committee: Cynthia Richards (Advisor); Rick Incorvati (Committee Member); Timothy Wilkerson (Committee Member) Subjects: British and Irish Literature; Literature

Doctor of Philosophy, The Ohio State University, 2019, English

Although the first balloon flights in 1783 created a sensation throughout Europe, human flight had long captured the imaginations of scientific and literary authors alike. Prior histories of flight begin with balloons, but earlier centuries boasted a strange and colorful aviary that shaped thinking about flight long before the first balloon ever left the ground. Taking a cultural materialist approach informed by a broad familiarity with the development of early flight machines and a deep familiarity with the literary conventions of the period, I analyze historical materials ranging from aeronautical treatises to stage pantomimes, from newspaper advertisements to philosophical poems, from mechanical diagrams to satirical cartoons. This earlier culture possessed high hopes and anxieties about human flight. I argue that early flight was lively and varied before the invention of a successful flying machine, and that these early flights were important because they established an aerial tradition astonishingly resistant to change. Rather than revolutionizing the culture, ballooning was quickly incorporated into it. Although ballooning came to be regarded as a failure by many onlookers, the aerial tradition had long become accustomed to failure and continued unabated. Human flight has always promised tremendous and yet debatable utility, a paradox that continues into the present age.

Committee: Roxann Wheeler (Advisor); David Brewer (Committee Member); Sandra Macpherson (Committee Member); Jacob Risinger (Committee Member) Subjects: Aeronomy; Aerospace Engineering; American Literature; Astronomy; British and Irish Literature; Comparative Literature; Engineering; European History; European Studies; Experiments; Folklore; Foreign Language; Germanic Literature; History; Language; Literature; Mechanical Engineering; Museums; Philosophy of Science; Physics; Science History; Technology; Theater; Theater History; World History

Master of Science (MS), Wright State University, 2018, Computer Science

Learning music instrument is a challenging task for a beginner without constant guidance from an instructor. The primary objective of this thesis research is to design and develop an iOS mobile / iPad learning app that helps users to learn and practice intonation for a suite of wind instruments by themselves with comfort and ease through app-provided tuning and charting guidance and app-assisted self-assessment. Particularly, our successfully-implemented app provides the following features to enhance the user's learning experience: 1 ) Provides learners easy-to-access information for the fingering and tuning techniques of wind instruments by converting Dr. Shelley Jagow's book – “Tuning for Wind Instruments: A Roadmap to Successful Intonation” to an iOS app. 2 ) Provides instant feedback on learner's technique and performance by assessing the intonation of individual note being played, while the fingering and tuning chart is presented simultaneously for the early practices. 3 ) provides instant feedback on learner's technique and performance by identifying the sequence of notes being played for subsequent practices. The app is implemented using Xcode and Swift 4.0 and will be distributed through Apple App Store

Committee: Yong Pei Ph.D. (Advisor); Mateen Rizki Ph.D. (Committee Member); Shelley Jagow Ph.D. (Committee Member) Subjects: Computer Science; Design; Music; Music Education; Technology

Doctor of Philosophy, The Ohio State University, 2017, English

Modes of the Flesh considers the ways that literary form—mode, in particular—shapes the representation of the human body in British literature from approximately 1660-1800. Focusing on the allegorical, satirical, pornographic, and gothic modes, this project aims to expand our conception of literary embodiment, establish the represented body as a formal element, and make embodiment central to our understanding of the textual representation of human beings. Because modally-inflected literary bodies engage the same kinds of ontological and epistemological questions entertained by this period's empiricist philosophy, I argue that mode offers its own kind of philosophy of the body. But, because modal bodies engage these questions with a very different set of tools, the results are often provocatively at odds with mainstream philosophical discourse. Existing scholarship on the literary body tends either to analyze the way a body is represented in order to better understand the work's themes or meanings, or to argue that the way a body is represented reflects historical or theoretical models of embodiment. This dissertation differs from the first tendency by offering a theory of the represented body, and therefore taking the body as an object, not an instrument, of study. It diverges from the second tendency by arguing that the way bodies are presented in literature has as much to do with the kind of text they appear in as with scientific, theological, social, or other extra-literary understandings of the body. In each chapter, I focus on a significant mode of Restoration and eighteenth-century literature, and a particular aspect of literary embodiment. The first chapter, on the allegorical mode and bodily matter, thinks about the function of materiality in a mode commonly associated with abstraction and interpretation. The second chapter, which considers the satirical mode and bodily form, explores the role of abstract form in satirical conceptions of personhood an (open full item for complete abstract)

Committee: Sandra Macpherson (Advisor); David Brewer (Committee Member); Robyn Warhol (Committee Member) Subjects: British and Irish Literature; Literature

Doctor of Philosophy, The Ohio State University, 1973, Graduate School

Committee: Not Provided (Other) Subjects: Literature

Doctor of Philosophy, The Ohio State University, 1976, Graduate School

Committee: Not Provided (Other) Subjects: Literature

Doctor of Philosophy, The Ohio State University, 1973, Graduate School

Committee: Not Provided (Other) Subjects: Literature

Doctor of Philosophy, The Ohio State University, 1970, Graduate School

Committee: Not Provided (Other) Subjects: Literature

Doctor of Business Administration, Cleveland State University, 2014, Monte Ahuja College of Business

I investigate the effect of supply-chain disruption on a firm's decisions on investment in quality, and on ordering decisions, when there is a choice between suppliers, and a variable rate of knowledge transfer. I find that supply-chain disruption has a negative effect on profit, which can be mitigated by appropriate policies for order allocation and supplier development. When the probability of disruption is high, the firm should seek alternative sources of supply (even if they have lower levels of quality). Under certain conditions, the firm can improve its profit by investing in quality improvement efforts at the alternative supplier. I consider three different policies for supply-chain management and quality investment, and find that investment in supplier development is warranted when the initial quality level of the new supplier is relatively low; when the expected rate of improvement from such investment is relatively high; when the effectiveness of inspection is relatively low; and when the cost of inspection is relatively high.

Committee: Susan Slotnick PhD (Advisor); Raymond Henry PhD (Committee Member); Birsen Karpak PhD (Committee Member); Walter Rom PhD (Committee Member) Subjects: Business Costs; Management; Operations Research

BA, Oberlin College, 1970, English

Of all the imagery available to the writer the body's imagery is perhaps the most powerful and immediate. Using arms and legs and eyebrow in his work he insures himself of a bond with his reader, for each reader has his own arms and legs and eyebrows to identify with in his mind and experience. No one can read Swift's terse sentence, "Last week I saw a woman flayed, and you will hardly believe how much it altered her person for the worse" without feeling a shudder of horror and sympathy in his own body. Travels into Several Remote Nations of the World, better known as Gulliver's Travels, is full of body images. Gulliver himself is a very fleshly human being; he is primarily interested in the people he finds. We, the readers, are first entranced by Gulliver because it tells us about people like ourselves only somehow different. It is this likeness with and difference from ourselves that makes Gulliver the powerfully intriguing book it is.

Committee: Robert Longsworth (Advisor) Subjects: Literature

MS, University of Cincinnati, 2009, Arts and Sciences : Geology

This study provides a lateglacial paleofire record for Michigan which will help to reconstruct the larger geographic pattern of fire during lateglacial time, as very few charcoal studies have been carried out for the Midwest. This work will be integrated into the Global Charcoal Database at the World Data Center for Paleoclimatology for future studies relating to fire patterns and regions, and vegetation and climate change. This study was initially designed to test the biomass burning aspect at 12,900 BP of the Firestone et al. (2007) extraterrestrial impact hypothesis. Four lakes near Flint Michigan were sampled because of their proximity to the Gainey Paleoindian site featured in the Firestone et al. (2007) paper. Charcoal was quantified in these four lakes to develop a multi-site lateglacial fire record for the Midwest. The results show contemporaneous fire not only at 12,900 BP but multiple times between 14,500 and 12,900 BP. This synchronicity of the fires between 14,500 and 12,900 BP suggests some as-yet-indeterminate large-scale natural cause, or causes. From 12,900 BP on into the Holocene, the pattern changes. Fires are continuous with high charcoal peaks at Swift Lake, continuous at Slack Lake but with slightly lower charcoal peaks compared to Swift, and having much lower peaks at Lake Sixteen and Big Fish Lake (charcoal is present but at very low levels). This pattern is interpreted to be a result of the distance from the Paleoindian site. Swift and Slack Lakes are each less than one km from the Gainey site, while the other two lakes are 30 km and 16 km away from it. The disparity of the amplitude of the signals in the fire patterns between the two pair of lakes from 12,900 BP forward in time suggests Paleoindian origin for fire. Additional radiocarbon dates are needed to refine the chronology of the timeline and gain a better understanding of the sedimentation rate. More charcoal research should be conducted on lakes across a larger region, for the inter (open full item for complete abstract)

Committee: Thomas Lowell (Advisor); Madeleine Briskin (Committee Member); Warren Huff (Committee Member) Subjects: Archaeology; Astrophysics; Cultural Anthropology; Earth; Ecology; Forestry; Freshwater Ecology; Geology; Paleobotany; Paleoecology; Paleontology

PHD, Kent State University, 2005, College of Communication and Information / School of Communication Studies

Temporary work groups have become a not-so-rare phenomenon in today's organizations (Jarvenpaa and Leidner, 1999). Groups with diversely skilled members who work together on a project for a short period of time and dissolve after the project is completed are a type of resource that organizations employ in order to sustain their competitive advantage. Being mainly a task group, their main goal should be directed toward productivity – having a quality project completed on-time. However, it is the group experience that factors in how organizational members approach groups and their general attitude about working in groups. In the present study I investigate the mechanisms by which swift trust (as a form of trust developed in temporary work groups) develops and propose and test a model of swift trust development in temporary work groups. The study involved 34 temporary work groups who participated in an experiment (158 participants). The results show that swift trust develops through direct and mediated paths. Affect and proactive attributions of trustworthiness, along with a general predisposition to trust others influence the formation of swift trust. Group communication behaviors – knowledge sharing and suspending judgment – were found to mediate the relationship between the predictors of trust and swift trust. Theoretical and practical implications of the model are discussed.

Committee: Rebecca Rubin (Advisor) Subjects: