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Software and Hardware-In-The-Loop Modeling of an Audio Watermarking Algorithm (open access)

Software and Hardware-In-The-Loop Modeling of an Audio Watermarking Algorithm

Due to the accelerated growth in digital music distribution, it becomes easy to modify, intercept, and distribute material illegally. To overcome the urgent need for copyright protection against piracy, several audio watermarking schemes have been proposed and implemented. These digital audio watermarking schemes have the purpose of embedding inaudible information within the host file to cover copyright and authentication issues. This thesis proposes an audio watermarking model using MATLAB® and Simulink® software for 1K and 2K fast Fourier transform (FFT) lengths. The watermark insertion process is performed in the frequency domain to guarantee the imperceptibility of the watermark to the human auditory system. Additionally, the proposed audio watermarking model was implemented in a Cyclone® II FPGA device from Altera® using the Altera® DSP Builder tool and MATLAB/Simulink® software. To evaluate the performance of the proposed audio watermarking scheme, effectiveness and fidelity performance tests were conducted for the proposed software and hardware-in-the-loop based audio watermarking model.
Date: December 2010
Creator: Zarate Orozco, Ismael
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Henderson Street Bazaar and Other Stories (open access)

Henderson Street Bazaar and Other Stories

The preface, "Against Buses: Charles Baxter and the Contemporary Epiphany" deals with the epiphany as a potential ending to short stories. Baxter holds that epiphanies are trite and without purpose in today's fiction. I argue that Baxter's view, while not without merit, is limiting. Beginning with James Joyce and Katherine Anne Porter and moving to my own work, I discuss how some epiphanies, particularly false ones, can enhance rather than detract from excellent fiction. Five short stories make up the remainder of this thesis: "Dedication," "Taking it with You," "Transition to Flowers," "Profile in Courage," and "Henderson Street Bazaar."
Date: December 2010
Creator: Briseño, J. Andrew
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Key to Unlocking the Secret Window (open access)

The Key to Unlocking the Secret Window

David Koepp's Secret Window was released by Columbia Pictures in 2004. The film's score was written by Philip Glass and Geoff Zanelli. This thesis analyzes transcriptions from six scenes within the film in conjunction with movie stills from those scenes in an attempt to explain how the film score functions.
Date: December 2010
Creator: McConnell, Sarah E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Purification of Cyanide-Degrading Nitrilase from Pseudomonas Fluorescens NCIMB 11764. (open access)

Purification of Cyanide-Degrading Nitrilase from Pseudomonas Fluorescens NCIMB 11764.

Cyanide is a well known toxicant that arises in the environment from both biological and industrial sources. Bacteria have evolved novel coping mechanisms for cyanide and function as principal agents in the biosphere for cyanide recycling. Some bacteria exhibit the unusual ability of growing on cyanide as the sole nitrogen source. One such organism is Pseudomonas fluorescens NCIMB 11764 (Pf11764) which employs a novel oxidative mechanism for detoxifying and assimilating cyanide. A unique complex of enzymes referred to as cyanide oxygenase (CNO) is responsible for this ability converting cyanide to ammonia which is then assimilated. Because one component of the four member CNO complex was previously shown to act on cyanide independent of the other members, its characterization was sought as a means of gaining a better understanding of the overall catalytic mechanism of the complex. Preliminary studies suggested that the enzyme belonged to a subset of nitrilase enzymes known as cyanide dihydratases (CynD), however, a cynD-like gene in Pf11764 could not be detected by PCR. Instead, a separate nitrilase (Nit) linked to cyanide metabolism was detected. The corresponding nit gene was shown to be one of a conserved set of nit genes traced to a unique cluster in bacteria …
Date: December 2010
Creator: Chou, Chia-Ni
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Portrayal of Race by Public and Private University Newspapers (open access)

Portrayal of Race by Public and Private University Newspapers

This study investigated how two college newspapers cover race and how the papers employed racial stereotypes when describing sources. One of newspapers is a student-produced paper at a private university. The other is a student-produced newspaper at a public university. The study conducted content analyses of front-page news stories in both college newspapers. The sources in the story were analyzed for racial stereotypes. Stereotypes were identified based on frames used in modern racism research. A t-test and chi-square were used to compare the coverage of minorities to Whites. Once the quantitative content analysis was completed, I used textual analysis to identify what ways the news stories used stereotypical coverage of minorities. The study used critical media theory.
Date: December 2010
Creator: Hayton, Tasha
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Endocannabinoid System in a Planarian Model (open access)

Endocannabinoid System in a Planarian Model

In this study, the presence and possible function of endocannabinoid ligands in the planarian is investigated. The endocannabinoids ananadamide (AEA) and 2-arachidonoylglycerol (2-AG) and entourage NAE compounds palmitoylethanolamide (PEA), stearoylethanolamide (SEA) and oleoylethanolamide (OEA) were found in Dugesia dorotocephala. Changes in SEA, PEA, and AEA levels were observed over the initial twelve hours of active regeneration. Exogenously applied AEA, 2-AG and their catabolic inhibition effected biphasic changes in locomotor velocity, analogous to those observed in murines. The genome of a close relative, Schmidtea mediterranea, courtesy of the University of Utah S. med genome database, was explored for cannabinoid receptors, none were found. A putative fatty acid amide hydrolase (FAAH) homolog was found in Schmidtea mediterranea.
Date: December 2010
Creator: Mustonen, Katie Lynn
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of Copying Before, Copying After, and Guessing on Acquisition Rate and Retention (open access)

The Effects of Copying Before, Copying After, and Guessing on Acquisition Rate and Retention

Computer-based instructional programs are being used more frequently in classrooms. While these programs offer many benefits from traditional teaching methods, humans still need to program them. There is inconsistency in the literature regarding the best way to design such programs. The purpose of this study was to evaluate the effects of three training procedures in teaching individuals to type a specified three-letter response in the presence of a corresponding symbol. Results show that the training format that prompted individuals to copy the correct response before the opportunity to respond was more efficient than viewing the correct response after an error, or copying the correct response after an error. A discussion of the results as well as implications for classroom use is also provided.
Date: December 2010
Creator: Pinkelman, Sarah Ellen
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Spatial Analysis of North Central Texas Traffic Fatalities 2001-2006 (open access)

Spatial Analysis of North Central Texas Traffic Fatalities 2001-2006

A traditional two dimensional (planar) statistical analysis was used to identify the clustering types of North Central Texas traffic fatalities occurring in 2001-2006. Over 3,700 crash locations clustered in ways that were unlike other researched regions. A two dimensional (x and y coordinates) space was manipulated to mimic a one dimensional network to identify the tightest clustering of fatalities in the nearly 400,000 crashes reported from state agencies from 2003-2006. The roadway design was found to significantly affect crash location. A one dimensional (linear) network analysis was then used to measure the statistically significant clustering of flow variables of after dark crashes and daylight crashes. Flow variables were determined to significantly affect crash location after dark. The linear and planar results were compared and the one dimensional, linear analysis was found to be more accurate because it did not over detect the clustering of events on a network.
Date: December 2010
Creator: Rafferty, Paula S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder (open access)

Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder

This research presents the results on an experimental investigation to identify the effect of polyphosphoric acid (PPA) on aging characteristics of an asphalt binder. Addition of PPA to asphalt binders is said to improve performance of flexible pavements. Asphalt binder PG 64-22 in modified and unmodified conditions was subjected to aging in the laboratory using a regular oven and also simulated short term aging using rolling thin film oven (RTFO) test. Aging experiments were conducted to analyze the extent of oxidation in terms of changes in molecular structure of the asphalt binder. These changes were appraised using Fourier transform infrared (FTIR) spectroscopy, dynamic shear rheometer (DSR), and epifluorescence microscopy tests. FTIR was used to determine the changes in major bands with addition of PPA. Stiffness and viscoelastic behaviors of asphalts were determined from the DSR test. The stiffness is measured by calculating the shear modulus, G* and the viscoelastic behavior is measured by calculating the phase angle, sin δ. Epifluorescence microscopy is a tool used to study properties of organic or inorganic substances. The morphological characteristics of PPA modified asphalt samples were observed through epifluorescence microscopy. Epifluorescence microscopy reveals the polymer phase distribution in the asphalt binders. Results of this …
Date: December 2010
Creator: Ramasamy, Naresh Baboo
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Neuropsychological Functioning in Active Duty Soldiers with Physical and/or Psychological Trauma (open access)

Neuropsychological Functioning in Active Duty Soldiers with Physical and/or Psychological Trauma

This quasi-experimental study investigates neuropsychological functioning differences between 63 active duty soldiers who were placed into three groups (MTBI, PTSD, control) to provide better information for differentiating PTSD and MTBI. The ANAM and MicroCog were utilized to measure psychomotor speed, memory, and attention. Participants with PTSD performed worse on most measures of psychomotor speed and attention, and endorsed more symptoms of depression and anxiety when compared to MTBI and control participants. Further, attention appears to be the best cognitive domain for differentiating PTSD from MTBI, whereas memory variables did not differentiate these groups. Clinical and research implications of these findings are discussed.
Date: December 2010
Creator: Klein, Robert S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Correlates of Video Game Addiction (open access)

Correlates of Video Game Addiction

Video game addiction often leads to a tremendous burden on those afflicted with the condition, draining their time, resources, and life away until they have nothing left. To further elucidate the problem of video game addiction, the current research examines the level of video game addiction of 111 participants, along with their motivation for their addictive behaviors, the quality of life of addicted individuals, and possible relations between video game addiction and other forms of addiction. Results of the current research indicate a correlation between addictive video game use and depression, alcohol use, a desire for escapism, a need for social interaction, and lack of self-control. The results of a multiple regression indicate that, amongst the various research factors, depression is the factor with the most significant link to addictive video game use, implying a dangerous correlation between mental health and an addictive behavior that some erroneously disqualify as a true addiction.
Date: December 2010
Creator: Langley, Alex
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Self-Efficacy and Fears of Pain and Injury in Gymnastics and Tumbling: Does a Previous Injury Matter? (open access)

Self-Efficacy and Fears of Pain and Injury in Gymnastics and Tumbling: Does a Previous Injury Matter?

The purpose of this study was to explore whether a previous gymnastic or tumbling injury influences gymnasts' and tumblers' self-efficacy, motivation, competition anxiety, and fears of pain and injury. Participants (N = 105) completed survey packets during practice which contained demographic questions and questionnaires that measure self-efficacy for physical abilities and exercise, self-motivation, risk of injury, pain catastrophizing, and sport anxiety. Results of a one-way ANOVA indicated that gymnasts and tumblers who experienced a previous injury were significantly different than those who had not experienced an injury on their self-efficacy for physical abilities (p = .007), self-motivation (p = .007), and perceived risk of reinjury (p = .018). Specifically, these findings indicate that gymnasts and tumblers with previous injuries experience higher levels of self-efficacy for physical abilities, self-motivation, and perceived risk of reinjury. Implications for coaches, gymnasts, and tumblers include: creating an open and comfortable environment to discuss pain and injury, developing strategies to break the negative cycle of fear of injury, and fostering a positive rehabilitation process. In the future, researchers should examine the influence that gender and type of competition has on self-efficacy, self-motivation, perceived risk of reinjury, pain perceptions, and competition anxiety of those who have experienced …
Date: December 2010
Creator: Jackson, Stacy
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Alignment of Middle School Core TEKS with Visual Arts TEKS (open access)

Alignment of Middle School Core TEKS with Visual Arts TEKS

This descriptive study uses a qualitative, content analysis to examine the middle school visual arts and core Texas Essential Knowledge and Skills (TEKS) to determine the potential common learning activities that can be aligned between the two. By performing an alignment of the potential common learning activities present in the middle school visual art TEKS and the middle school core TEKS, I demonstrate that there is a foundation for curriculum integration in the Texas middle school visual arts classroom.
Date: December 2010
Creator: Hartman, Jennifer
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Schoolyard Politics: Ethics and Language at the International Criminal Tribunal for the Former Yugoslavia (open access)

Schoolyard Politics: Ethics and Language at the International Criminal Tribunal for the Former Yugoslavia

The International Criminal Tribunal for the Former Yugoslavia (ICTY) has been both contentious and successful. By examining the ICTY from a Levinasian ethical standpoint, we might be able to understand how the court uses language to enforce ethical and moral standards upon post-war societies. Using linguistic methods of analysis combined with traditional data about the ICTY, I empirically examine the court using ordinary least squares (OLS) in order to show the impact that language has upon the court's decision making process. I hypothesize that the court is an ethical entity, and therefore we should not see any evidence of bias against Serbs and that language will provide a robust view of the court as an ethical mechanism.
Date: December 2010
Creator: Hatcher, Robert
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Fashioning the Domestic Ideology: Women and the Language of Fashion in the Works of Elizabeth Stoddard, Louisa May Alcott, and Elizabeth Keckley (open access)

Fashioning the Domestic Ideology: Women and the Language of Fashion in the Works of Elizabeth Stoddard, Louisa May Alcott, and Elizabeth Keckley

Women authors in mid to late nineteenth century American society were unafraid to shed the old domestic ideology and set new examples for women outside of racial and gender spheres. This essay focuses on the ways in which Elizabeth Stoddard's The Morgesons, Louisa May Alcott's Behind a Mask, and Elizabeth Keckley's Behind the Scenes, or, Thirty Years a Slave, and Four Years in the White House represent the function of fashion and attire in literature. Each author encourages readers to examine dress in a way that defies the typical domestic ideology of nineteenth century America. I want my readers to understand the role of fashion in literature as I progress through each work and ultimately show how each female author and protagonist set a new example for womanhood through their fashion choices.
Date: December 2010
Creator: Villafranca, Brooke
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Hugo Wolf's Interpretation of Paul Heyse's Texts: An Examination of Selected Songs from the Italienisches Liederbuch (open access)

Hugo Wolf's Interpretation of Paul Heyse's Texts: An Examination of Selected Songs from the Italienisches Liederbuch

In a Romantic song cycle or songbook, songs tend to share many common ideas because they are used to set to the poems from one collection written or collected by one author. Many composers designed the same motivic or structural elements to a group of songs for unity, and sometimes they made chronological narratives for the series of poems. Music theorists have tried to find out a way of giving a sense of unity or narrative to the songs in a song cycle or songbook by analyzing its musical language and text setting. They have suggested plausible explanations for the relationships among the songs in a song cycle or songbook, and some theorists have traced the tonal movements and provided a visual explanation for them. Hugo Wolf's two volumes of the Italienisches Liederbuch (1890-91, 1896) were set to the forty-six poems from Paul Heyse's well-selected works. Wolf's way of selecting poems from Heyse's collection seems inconsistent, and his song ordering in the both volumes does not show evident rules. However, a closer study for relationships between the songs could widen our perspective to comprehend the whole songbook as a unified storyline. This study selected the first four songs from each …
Date: December 2010
Creator: Shin, Dong Jin
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Source-bonding as a Variable in Electroacoustic Composition: Faktura and Acoustics in Understatements (open access)

Source-bonding as a Variable in Electroacoustic Composition: Faktura and Acoustics in Understatements

Understatements for two-channel fixed media is a four-movement study of the sonic potential of acoustic instruments within the practice of electroacoustic studio composition. The musical identity of the entire composition is achieved through consistent approaches to disparate instrumental materials and a focused investigation of the relationships between the various acoustic timbres and their electroacoustic treatments. The analytical section of this paper builds on contemporary research in electroacoustic arts. The analysis of the work is preceded by a summary of theoretical and aesthetic approaches within electroacoustic composition and the introduction of primary criteria of sonic faktura (material essence) used in the compositional process. The analyses address the idiosyncratic use of the concept of faktura to contextualize and guide the unfolding of the work. The reconciliation of the illusory electronic textures and the acoustic sources that parented them may be considered the ultimate goal of Understatements.
Date: December 2010
Creator: Rostovtsev, Ilya Y.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Induced Bradycardia Effects on Angiogenesis, Growth and Development in Early Development in Chicken Embryos, Gallus Domesticus (open access)

Induced Bradycardia Effects on Angiogenesis, Growth and Development in Early Development in Chicken Embryos, Gallus Domesticus

Cardiac performance, angiogenesis and growth was investigated during early chicken development. Heart rate, and thus arterial pulse pressure and cardiac output, were altered with the bradycardic drug ZD7288. Heart rates at 72 h of development of control embryos and those dosed with chicken Ringer were not different at 171 bpm. Acute and chronic application of ZD7288 caused significant bradycardia. Chronic dosing of Ringer and ZD7288 changed neither eye diameter nor development rate. Chronic dosing of ZD7288 did not significantly alter CAM vessel density close to the embryo (2, 3 and 4 mm) but at farther distances (5 and 6 mm) chronic dosing with both Ringer and ZD7288 decreased vessel density by 13 - 16%. Chronic dosing with ZD7288 also reduced body mass by 20%. Thus, lowered heart rate and cardiac output had little effect on vessel density or developmental stage, but did reduce embryo growth.
Date: December 2010
Creator: Ruck, Sylvia A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Implementation of Turbo Codes on GNU Radio (open access)

Implementation of Turbo Codes on GNU Radio

This thesis investigates the design and implementation of turbo codes over the GNU radio. The turbo codes is a class of iterative channel codes which demonstrates strong capability for error correction. A software defined radio (SDR) is a communication system which can implement different modulation schemes and tune to any frequency band by means of software that can control the programmable hardware. SDR utilizes the general purpose computer to perform certain signal processing techniques. We implement a turbo coding system using the Universal Software Radio Peripheral (USRP), a widely used SDR platform from Ettus. Detail configuration and performance comparison are also provided in this research.
Date: December 2010
Creator: Talasila, Mahendra
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Thermal Identification of Clandestine Burials: A Signature Analysis and Image Classification Approach (open access)

Thermal Identification of Clandestine Burials: A Signature Analysis and Image Classification Approach

Clandestine burials, the interred human remains of forensic interest, are generally small features located in isolated environments. Typical ground searches can be both time-consuming and dangerous. Thermal remote sensing has been recognized for some time as a possible search strategy for such burials that are in relatively open areas; however, there is a paucity of published research with respect to this application. This project involved image manipulation, the analyses of signatures for "graves" of various depths when compared to an undisturbed background, and the use of image classification techniques to tease out these features. This research demonstrates a relationship between the depth of burial disturbance and the resultant signature. Further, image classification techniques, especially object-oriented algorithms, can be successfully applied to single band thermal imagery. These findings may ultimately decrease burial search times for law enforcement and increase the likelihood of locating clandestine graves.
Date: December 2010
Creator: Servello, John A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Forensic Science Applications Utilizing Nanomanipulation-Coupled to Nanospray Ionization-Mass Spectrometry for the Analysis of Ultra-Trace Illicit Drugs (open access)

Forensic Science Applications Utilizing Nanomanipulation-Coupled to Nanospray Ionization-Mass Spectrometry for the Analysis of Ultra-Trace Illicit Drugs

Presented in this thesis are two methods that are coupled to the instrumentation for the recovery and analysis of ultra-trace illicit drug residues. The electrostatic dust lifting process is coupled with nanomanipulation-nanospray ionization to retrieve drug particles off of hard surfaces for analysis. For the second method, drug residues from fingerprint impressions are extracted followed by analysis. The methodology of these hyphenated techniques toward forensic science applications is applied as to explore limits of detection, sensitivity, and selectivity of analytes as well as immediacy and efficiency of analysis. The application of nanomanipulation-coupled to nanospray ionization-mass spectrometry toward forensic science based applications is considered as future improvements to trace and ultra-trace analysis.
Date: December 2010
Creator: Wallace, Nicole
Object Type: Thesis or Dissertation
System: The UNT Digital Library
White Creole Women in the British West Indies: From Stereotype to Caricature (open access)

White Creole Women in the British West Indies: From Stereotype to Caricature

Many researchers of gender studies and colonial history ignore the lives of European women in the British West Indies. The scarcity of written information combined with preconceived notions about the character of the women inhabiting the islands make this the "final frontier" in colonial studies on women. Over the long eighteenth century, travel literature by men reduced creole white women to a stereotype that endured in literature and visual representations. The writings of female authors, who also visited the plantation islands, display their opinions on the creole white women through their letters, diaries and journals. Male authors were preoccupied with the sexual morality of the women, whereas the female authors focus on the temperate lifestyles of the local females. The popular perceptions of the creole white women seen in periodicals, literature, and caricatures in Britain seem to follow this trend, taking for their sources the travel histories.
Date: December 2010
Creator: Northrop, Chloe Aubra
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Global Expansion of Transnational Retailers: A Case Study of the Localization Strategy of Costco in Taiwan (open access)

The Global Expansion of Transnational Retailers: A Case Study of the Localization Strategy of Costco in Taiwan

This research focuses on the global expansion of the transnational retail industry. Globalization is a phenomenon experienced by many industries in the present global economy. The global production network (GPN) framework can be used to explain and interpret the phenomenon of transnational firms' adaptation strategies. Due to market saturation in their home countries, retailers began to expand into East Asia in the 1980s. However, cultural differences and legislative limitations created barriers and restrictions for the transnational retailers making this transition. How do firms overcome these challenges? Through a case study of Costco in Taiwan, this research investigates the ways in which retailers adapt their strategies with regard to three concerns: site decisions, product mix selection, and supply network consolidation. The results shows that Costco opted for a strategy of lesser localization in all three domains. This research provides evidence to support this characterization along with examples of Costco's localization strategies via a case study and focuses on the issue of the balance between localization and standardization in the GPN framework.
Date: December 2010
Creator: Yeh, YunLung
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Syntheses, X-ray Diffraction Structures, and Kinetics on New Formamidinate-Substituted Triosmium Clusters (open access)

Syntheses, X-ray Diffraction Structures, and Kinetics on New Formamidinate-Substituted Triosmium Clusters

The reaction between the formamidine ligand PriN=CHNHPri and the activated cluster Os3(CO)10(MeCN)2 has been studied. A rapid reaction is observed at room temperature, yielding the hydride clusters HOs3(CO)9[μ-OCNPriC(H)NPri] and HOs3(CO)10[μ-NPriC(H)NPri] as the principal products. The spectroscopic data and X-ray diffraction structures of those formamidinate-substituted clusters will be present. The thermal reactivity of the clusters has been investigated, with the face-capped cluster HOs3(CO)9[μ-NPriC(H)NPri] found as the sole observable product. The relationship between these three clusters has been established by kinetic studies, the results of which will be discussed.
Date: December 2010
Creator: Yang, Li
Object Type: Thesis or Dissertation
System: The UNT Digital Library