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Study of Copper Electrodeposition on Ruthenium Oxide Surfaces and Bimetallic Corrosion of Copper/Ruthenium in Gallic Acid Solution (open access)

Study of Copper Electrodeposition on Ruthenium Oxide Surfaces and Bimetallic Corrosion of Copper/Ruthenium in Gallic Acid Solution

Ruthenium, proposed as a new candidate of diffusion barrier, has three different kinds of oxides, which are native oxide, electrochemical reversible oxide and electrochemical irreversible oxide. Native oxide was formed by naturally exposed to air. Electrochemical reversible oxide was formed at lower anodic potential region, and irreversible oxides were formed at higher anodic potential region. In this study, we were focusing on the effect of copper electrodeposition on each type of oxides. From decreased charge of anodic stripping peaks and underpotential deposition (UPD) waves in cyclic voltammetry (CV), efficiency of Cu deposition dropped off indicating that interfacial binding strength between Cu and Ru oxides was weakened when the Ru surface was covered with irreversible oxide and native oxide. Also, Cu UPD was hindered by both O2 and H2 plasma modified Ru surfaces because the binding strength between Cu and Ru was weakened by O2 and H2 plasma treatment. Cu/Ru and Cu/Ta bimetallic corrosion was studied for understanding the corrosion behavior between diffusion barrier (Ta and Ru) and Cu interconnects under the post chemical mechanical planarization (CMP) process in semiconductor fabrication. Gallic acid is used in post CMP slurry solution and is known well as antioxidant which is supposed to oxidize …
Date: August 2007
Creator: Yu, Kyle K.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Structural Octatonicism in Cindy McTee's Symphony No.1: Ballet for Orchestra (open access)

Structural Octatonicism in Cindy McTee's Symphony No.1: Ballet for Orchestra

Cindy McTee's Symphony No. 1: Ballet for Orchestra is composed primarily of pitch materials from the octatonic collections that contain both diatonic and non-diatonic relationships in the themes, harmonic content, and larger structure of the symphony. Because the octatonic collections contain the potential for both diatonic and non-diatonic relationships, the piece is argued to have octatonic structure, as the octatonic collection is capable of producing both relationships. The second chapter contains a review of the literature, focusing particularly on the work of Arthur Berger, Pieter C. van den Toorn, Richard Taruskin, and Allen Forte. Next, the octatonic structure of the symphony is shown in the thematic material. Finally, the harmonic support and large-scale structure of the piece are shown to contain octatonic relationships as well.
Date: August 2007
Creator: Weaver, Jennifer L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The reshaping of the traditional television advertising model: An analysis of media agency perceptions and decision-making processes regarding the effects of digital video recorders on television commercial effectiveness. (open access)

The reshaping of the traditional television advertising model: An analysis of media agency perceptions and decision-making processes regarding the effects of digital video recorders on television commercial effectiveness.

This research analyzes media agency executives' perceptions and strategic decision-making processes when accessing the impact of digital video recorders (DVRs) on the traditional television commercial spot. Strategic decision-making models, as well as major industry research, forms the theoretical framework used to guide the study. The research takes a quantitative approach using a survey in order to obtain the perceptions and decision-making processes of the media agency executives'. The findings are presented while a discussion of the findings is detailed. The thesis concludes with a summary of the overall thesis research as applied to the field of study.
Date: August 2007
Creator: Way, Heather C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Earth Tones: How Environmental Journalism and Environmental Ethics Influence Environmental Citizenship (open access)

Earth Tones: How Environmental Journalism and Environmental Ethics Influence Environmental Citizenship

Environmental ethics and environmental journalism are influencing the developing philosophy of environmental citizenship. This philosophy involves the ideas that people are part of the environment, that the future depends on a healthy environment, and that action on behalf of the environment is necessary. It applies to individuals, communities, large and small companies and corporations, governments, and a coalition of nations. Environmental philosophers and environmental journalists can work together, in a symbiotic way, to foster discussions among citizens and policy makers about ideas as well as events, and thus, influence attitudes and policies, and continue to influence environmental citizenship. Environmental citizenship as an extension of democracy offers the best chance for undoing the manmade problems which are degrading the quality of life on Earth. A healthier environment is the will of the people. An informed, voting public will succeed in creating a healthier environment. Pioneering work by philosophers and journalists, especially over the last forty-five years has brought the dialogue about environmental problems to an unprecedented level and continues to offer encouragement to the mindful evolution of mankind. These ecological discussions of rights and responsibilities, intrinsic and economic values, pragmatism and utilitarianism, culture and spirit, are increasingly being applied to a …
Date: August 2007
Creator: Wall, Don
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Blessed and the Damned: Peacemakers, Warlords, and Post Civil War Democracy (open access)

The Blessed and the Damned: Peacemakers, Warlords, and Post Civil War Democracy

This thesis seeks to explain how democracies emerge out of the ashes of civil wars. This paper envisions transitions to democracy after a civil war largely as a function of the peace process. Democracy is thought of as a medium through which solutions to the problems and issues over which the civil war was fought can be solved without violence. Transitions to democracy are more likely if there is a large bargaining space and the problems of credible commitments to democratization can be solved. Democratization is more likely if four conditions exist in a state after the civil war: a negotiated settlement, credible commitments via international enforcement, demobilization, and a cooperative international environment. The hypotheses derived are tested through an event history analysis for two different standards of democracy. The results suggest that factors indicative of all four theoretical concepts contribute to the likelihood of democratization after a civil war.
Date: August 2007
Creator: Wright, Thorin M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Examining the relationship between employee-superior conflict and voluntary turnover in the workplace: A comparison of companies across industries. (open access)

Examining the relationship between employee-superior conflict and voluntary turnover in the workplace: A comparison of companies across industries.

Employee turnover is a topic of concern for a multitude of organizations. A variety of work-related factors play into why an individual chooses to change jobs, but these are often symptoms of underlying issues, such as conflict. This study set out to determine if conflict between employees and their superiors has an impact on the level of turnover in an organization, and if manufacturing versus non-manufacturing industry type makes a difference. The generated data were based on 141 selected cases from the ethnographic cases in the Workplace Ethnography Project. Linear and logistic regressions were performed, finding that there is a significant relationship between conflict with superiors and the level of turnover.
Date: August 2007
Creator: West, Lindsey Straka
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Electrodeposition of Copper on Ruthenium Oxides and Bimetallic Corrosion of Copper/Ruthenium in Polyphenolic Antioxidants (open access)

Electrodeposition of Copper on Ruthenium Oxides and Bimetallic Corrosion of Copper/Ruthenium in Polyphenolic Antioxidants

Copper (Cu) electrodeposition on ruthenium (Ru) oxides was studied due to important implications in semiconductor industry. Ruthenium, proposed as the copper diffusion barrier/liner material, has higher oxygen affinity to form different oxides. Three different oxides (the native oxide, reversible oxide, and irreversible oxide) were studied. Native oxide can be formed on exposing Ru in atmosphere. The reversible and irreversible oxides can be formed by applying electrochemical potential. Investigation of Cu under potential deposition on these oxides indicates the similarity between native and reversible oxides by its nature of inhibiting Cu deposition. Irreversible oxide formed on Ru surface is rather conductive and interfacial binding between Cu and Ru is greatly enhanced. After deposition, bimetallic corrosion of Cu/Ru in different polyphenols was studied. Polyphenols are widely used as antioxidants in post chemical mechanical planarization (CMP). For this purpose, different trihydroxyl substituted benzenes were used as antioxidants. Ru, with its noble nature enhances bimetallic corrosion of Cu. Gallic acid (3,4,5 - trihydroxybenzoic acid) was chosen as model compound. A mechanism has been proposed and validity of the mechanism was checked with other antioxidants. Results show that understanding the chemical structure of antioxidants is necessary during its course of reaction with Cu.
Date: August 2007
Creator: Venkataraman, Shyam S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Manuel M. Ponce: A critical study of his Concierto Romántico for piano and orchestra. (open access)

Manuel M. Ponce: A critical study of his Concierto Romántico for piano and orchestra.

The Concierto Romántico for Piano and Orchestra is one of Manuel M. Ponce's outstanding compositional accomplishments from his Romantic period, reflecting both the state of Mexican music at the turn of the 20th century, and his early nationalist tendencies. However, it remains the only concerto in Ponce's output in need of a more comprehensive analysis. This treatise focuses on a global investigative that examines descriptive and analytic references to the work, as well as a comparison and clarification of the existing score sources. An analytical and stylistic musical study using conventional theoretical techniques leads to a musicological interpretation of the work's extra-musical meaning, based on close assessments of Ponce's compositional practice and social principles.
Date: August 2007
Creator: Vázquez, Carlos Balam
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Facet Satisfaction Scale: Enhancing the measurement of job satisfaction. (open access)

The Facet Satisfaction Scale: Enhancing the measurement of job satisfaction.

Job satisfaction is an important job-related attitude that has been linked to various outcomes for both the organization and its employees. In spite of this, researchers of the construct disagree about how job satisfaction is defined and measured. This study proposes the use of the Facet Satisfaction Scale, a new scale of measurement for job satisfaction that is based on more recent definitions of the construct. Reliability and preliminary predictive validity studies were conducted in order to determine the utility of this scale. Next steps in scale development are discussed.
Date: August 2007
Creator: Yeoh, Terence Eng Siong
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Two Annunciations: Examples of interpellation or offers of reception? a comparative analysis of pictures by Roger van der Weyden and René Magritte. (open access)

Two Annunciations: Examples of interpellation or offers of reception? a comparative analysis of pictures by Roger van der Weyden and René Magritte.

This thesis uses reception theory, as formulated by the late Wolfgang Iser, as well as ideas about interpellation or hailing, to compare and analyze two paintings: The Annunciation (c. 1435) by Roger van der Weyden and Personal Values (1952) by René Magritte. It demonstrates that interpellation and reception are part of the same process, and that reception theory is especially suited to this comparison and analysis-because it allows consideration of ways in which the comparable pictorial structures of both paintings facilitate their intentions. It argues that those intentions are to engage viewers in a dialogue that ultimately is beneficial to both pictures and viewers. Furthermore, based on this shared intent, and on visible structural similarities, it argues that each of the two paintings identifies and receives the other as a picture of the same image-that is, of the Annunciation.
Date: August 2007
Creator: Tyson, Janet Stiles
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Determining the Suitability of Functional Landscapes and Wildlife Corridors Utilizing Conservation GIS Methods in Denton County, Texas. (open access)

Determining the Suitability of Functional Landscapes and Wildlife Corridors Utilizing Conservation GIS Methods in Denton County, Texas.

Denton County's unique cultural and natural landscape has undergone dramatic transformations during the past two centuries due to agricultural, urban and suburban processes which accelerated the loss and removal of native habitat and wildlife. This research sought out to identify the remaining natural areas which retain their natural features and support wildlife. Research methodology included fundamental principles of Conservation Planning, Geographical Information Systems, and Habitat Evaluation Procedures for identifying remnant functional landscapes and wildlife corridors. The final results suggest that Denton County's rural landscape retains the functional properties and elements suitable for habitat conservation and wildlife corridors, while also pointing to the fundamental obstacles to conservation posed by continued growth and private landownership.
Date: August 2007
Creator: Sales, Joshua
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Programming homeland security: Citizen preparedness and the threat of terrorism. (open access)

Programming homeland security: Citizen preparedness and the threat of terrorism.

This thesis tests the necessity of terrorism in articulating Homeland Security citizenship. Chapter 1 orients the study, reviewing relevant literature. Chapter 2 examines the USDHS Ready Kids program's Homeland Security Guide, mapping a baseline for how Homeland Security citizenship is articulated with the overt use of terrorism. Chapter 3 investigates the USDHS Ready Kids program, charting the logic of Homeland Security citizenship when the threat of terrorism is removed from sense making about preparedness. Chapter 4 compares the findings of Chapters 2 and 3, evaluating the similarities and differences between these two articulations of Homeland Security citizenship and concluding that the logic that cements Homeland Security into American society does not depend on the threat of terrorism against the United States.
Date: August 2007
Creator: Register, David
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Awakening a World With Words: How J.R.R. Tolkien Uses Linguistic Narrative Techniques to Take His Readers to Faery in His Short Story Smith of Wootton Major. (open access)

Awakening a World With Words: How J.R.R. Tolkien Uses Linguistic Narrative Techniques to Take His Readers to Faery in His Short Story Smith of Wootton Major.

J.R.R. Tolkien uses specific linguistic narrative techniques in Smith of Wootton Major to make the world of Wootton Major and the nearby land of Faery come to life for his readers. In this thesis, I examine how Tolkien accomplishes this feat by presenting a linguistic analysis of some parts of the story. My analysis is also informed by Tolkien's own ideas of fairy-stories, and as such, it uniquely shows the symbiotic relationship between Tolkien's theories and his narrative art.
Date: August 2007
Creator: Pueppke, Michael
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Case Study of NASA's Columbia Tragedy: An Organizational Learning and Sensemaking Approach to Organizational Crisis. (open access)

A Case Study of NASA's Columbia Tragedy: An Organizational Learning and Sensemaking Approach to Organizational Crisis.

No other government agency receives as much attention as the National Aeronautics and Space Administration (NASA). The high-profile agency frequently captures attention of the media in both positive and negative contexts. This thesis takes a case study approach using organizational learning and sensemaking theories to investigate crisis communication within NASA's 2003 Columbia tragedy. Eight participants, who in some capacity had worked for NASA during the Columbia tragedy in a communication centered position, were interviewed. Using a grounded theory framework, nine themes emerged pertaining to organizational learning, leadership, structure, and organizational culture. The results of the study aid in understanding how high risk organization's (HROs) can learn from previous failures and details how organizational culture can hinder organizational change.
Date: December 2007
Creator: James, Eric Preston
Object Type: Thesis or Dissertation
System: The UNT Digital Library