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 Decade: 2010-2019
 Collection: UNT Theses and Dissertations
Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs

Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs

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Date: August 2010
Creator: Li, Minghang
Description: Phosphorescent organic light emitting diodes (PHOLEDs) based on efficient electrophosphorescent dopant, platinum(II)-pyridyltriazolate complex, bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) have been studied and improved with respect to power efficiency, external efficiency, chromacity and efficiency roll-off. By studying the electrical and optical behavior of the doped devices and functionality of the various constituent layers, devices with a maximum EQE of 20.8±0.2 % and power efficiency of 45.1±0.9 lm/W (77lm/W with luminaries) have been engineered. This improvement compares to devices whose emission initially could only be detected by a photomultiplier tube in a darkened environment. These devices consisted of a 65 % bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) doped into 4,4'-bis(carbazol-9-yl)triphenylamine (CBP) an EML layer, a hole transporting layer/electron blocker of 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), an electron transport layer of 1,3,5-tris(phenyl-2-benzimidazolyl)-benzene (TPBI), and a LiF/Al cathode. These devices show the acceptable range for warm white light quadrants and qualify to be called "warm white" even w/o adding another emissive layer. Dual EML devices composed of neat Pt(ptp)2 films emitting orange and CBP: Pt(ptp)2 film emitting blue-green produced a color rendering index (CRI) of 59 and color coordinates (CIE) of (0.47,0.49) at 1000Cd/m² with power efficiency of 12.6±0.2 lm/W and EQE of 10.8±0.2 %. Devices with two blue fluorescent emission layers as singlet ...
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Road Debris

Road Debris

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Date: May 2012
Creator: Dewoody, Dale W.
Description: This dissertation comprises two parts: Part I, which discusses the growing trend in project books in contemporary poetry, and Part II, a collection of poems titled, Road Debris. There is an increasing trend in the number of project books, which are collections of poetry unified in both thematic and formal ways. the individual poems in a project book share overt connections which allow the book to work on many different levels, blending elements of fiction and non-fiction or sharing a specific theme or speaker. While these books have the advantage of being easily memorable, which might gain poets an edge in book contests, there are also many risks involved. the main issue surrounding project books is if the individual poems can justify the book, or do they seem too repetitive or forced. As more poets, especially newer ones, try to use the project book as a shortcut to publication, it can result in poorly written poems forced to fit into a particular concept. By examining three successful cotemporary project books—The Quick of It, by Eamon Grennan; Incident Light, by H. L. Hix; and Romey’s Order by Astory Riley—this essay discusses how these books work in order to understand the potential ...
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The Natural Learning Process and Its Implications for Trombone Pedagogy

The Natural Learning Process and Its Implications for Trombone Pedagogy

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Date: May 2012
Creator: Reider, Shane Robert
Description: This thesis considers the natural learning process as defined by Timothy Gallwey and Daniel Kohut. This learning theory is examined and applied to trombone pedagogy while also considering physiological attributes to trombone performance. a brief synopsis of the history and lineage of the trombone is considered in order to understand the current setting of the trombone medium.
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Culture and self-representation in the Este court: Ercole Strozzi's funeral Elegy of Eleonora of Aragon, a Text, Translation, and Commentary.

Culture and self-representation in the Este court: Ercole Strozzi's funeral Elegy of Eleonora of Aragon, a Text, Translation, and Commentary.

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Date: December 2010
Creator: Cassella, Dean Marcel
Description: This dissertation presents a previously unedited text by one of the most distinguished- yet neglected-Latin writers of the Italian Renaissance, Ercole Strozzi (1471-1508), a poet and administrator in the court of Ferrara. Under the Este Dukes, Ferrara became a major center of literary and artistic patronage. The Latin literary output of the court, however, has received insufficient scholarly scrutiny. The text is a verse funeral elegy of Eleonora of Aragon (1450-1493), the first Duchess of Ferrara. Eleonora was a remarkable woman whose talents and indefatigable efforts on behalf of her husband, her children, and her state, won her accolades both at home and abroad. She also served as a prototype for the remarkable careers of her two daughters, Isabella d'Este, and Beatrice d'Este, who are celebrated for their erudition and patronage of arts and letters. The text is a mirror of the Estense court and reveals to us how its members no doubt saw themselves, at the very peak of its temporal power and the height of its prestige as a center of cultural creativity. It is also important for the striking portrait it presents of Eleonora. Ercole Strozzi chose to call his poem an epicedium, an ancient minor literary ...
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Anchor Nodes Placement for Effective Passive Localization

Anchor Nodes Placement for Effective Passive Localization

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Date: August 2010
Creator: Pasupathy, Karthikeyan
Description: Wireless sensor networks are composed of sensor nodes, which can monitor an environment and observe events of interest. These networks are applied in various fields including but not limited to environmental, industrial and habitat monitoring. In many applications, the exact location of the sensor nodes is unknown after deployment. Localization is a process used to find sensor node's positional coordinates, which is vital information. The localization is generally assisted by anchor nodes that are also sensor nodes but with known locations. Anchor nodes generally are expensive and need to be optimally placed for effective localization. Passive localization is one of the localization techniques where the sensor nodes silently listen to the global events like thunder sounds, seismic waves, lighting, etc. According to previous studies, the ideal location to place anchor nodes was on the perimeter of the sensor network. This may not be the case in passive localization, since the function of anchor nodes here is different than the anchor nodes used in other localization systems. I do extensive studies on positioning anchor nodes for effective localization. Several simulations are run in dense and sparse networks for proper positioning of anchor nodes. I show that, for effective passive localization, the ...
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Dead Fox Run: A Collection of Stories

Dead Fox Run: A Collection of Stories

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Date: May 2011
Creator: Starz, Andrew
Description: This collection consists of a critical preface and five linked short stories. The preface analyzes the usage of violence in literate and other forms of media, and specifically the ways in which literature can address violence without aggrandizing or stylizing it. The stories explore this idea through the lens of the lives of two young men, following them from boyhood marked by violence to adulthood crushed by the trauma of the American Civil War. Collection includes the stories "Dead Foxes," "Cow Pen," "Fatherless," "Woodsmoke," and "Brotherhood."
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A Revolution in Warfare?  the Army of the Sambre and Meuse and the 1794 Fleurus Campaign

A Revolution in Warfare? the Army of the Sambre and Meuse and the 1794 Fleurus Campaign

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Date: August 2012
Creator: Hayworth, Jordan R.
Description: During the War of the First Coalition, the Army of the Sambre and Meuse, commanded by Jean-Baptiste Jourdan, played the decisive role against Coalition forces in the Low Countries. Created in June 1794, the army defeated the Allies at the battle of Second Fleurus on 26 June 1794 and commenced the Coalition’s retreat to the Rhine River. At the end of the year, Jourdan led the army to winter quarters along the left bank of the Rhine and achieved France’s historically momentous “natural frontier.” Despite its historical significance, the Army of the Sambre and Meuse has suffered from scant historical attention. Based largely on archival research, this thesis provides a detailed examination of the army’s performance during the Fleurus campaign. In addition, this thesis pursues several broader themes. A detailed study of the Sambre and Meuse Army provides insight into institutional military change during the late eighteenth century. While historians traditionally argue that the French Revolution inaugurated an attendant “revolution in military affairs,” this thesis presents evidence of evolutionary changes and continuities. Another important theme is the question of the combat effectiveness of French field armies during the Revolutionary epoch. Although historians typically present the French armies as unique and ...
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Dream of a Thousand Keys: A Concerto for Piano and Orchestra

Dream of a Thousand Keys: A Concerto for Piano and Orchestra

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Date: May 2011
Creator: Choi, Da Jeong
Description: Dream of a Thousand Keys is a concerto for piano and orchestra, which consists of four movements presenting multiple dimensional meanings as suggested by the word "key." I trace the derivation of Korean traditional rhythmic cycles and numerical sequences, such as the Fibonacci series, that are used throughout the work, and explore the significant role of space between the soloist and piano that are emphasized in a theatrical aspect of the composition. The essay addresses the question of musical contrasts, similarities, and metamorphosis. Lastly, I cover terms and concepts of significant 21st-century compositional techniques that come into play in the analysis of this work.
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A Chorus of Trees

A Chorus of Trees

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Date: August 2010
Creator: Lyons, Renée Kathleen
Description: This two-part thesis includes a critical preface and a collection of my poems. Using three poems-Louise Glück's "Lullaby," Bob Hicok's "Poem for My Mother's Hysterectomy," and Nick Flynn's "Memento Mori"-the critical preface examines how, in poetry, the transformation of a body negotiates trauma and triggers a conceptual shift, the creation and revision of identity, and the release of the duende's inspirational force. The collection of poetry that follows seeks to transfigure the body as a way to explore the nuanced traumas of human experience.
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Jeans, Boots, and Starry Skies: Tales of a Gay Country-and-Western Bar and Places Nearby

Jeans, Boots, and Starry Skies: Tales of a Gay Country-and-Western Bar and Places Nearby

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Date: May 2010
Creator: Gay, Wayne Lee
Description: Fourteen short stories, with five interspersed vignettes, describe the lives of gay people in the southwestern United States, centered around a fictional gay country-and-western bar in Dallas and a small town in Oklahoma. Various characters, themes, and trajectories recur in the manner of a short story cycle, as explained in the prefatory Critical Analysis, which focuses on exemplary works of James Joyce, Ernest Hemingway, William Faulkner, Shirley Jackson, Italo Calvino, Yevgeny Kharitonov, and Louise Erdrich.
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