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Emotion Recognition Using EEG Signals (open access)

Emotion Recognition Using EEG Signals

Emotions have significant importance in human life in learning, decision-making, daily interaction, and perception of the surrounding environment. Hence, it has become very essential to detect and recognize a person's emotional states and to build a connection between humans and computers. This process is called brain-computer interaction (BCI) and is a vast field of research in neuroscience. Hence, in the past few years, emotion recognition has gained adequate attention in the research community. In this thesis, an emotion recognition system is designed and analyzed using EEG signals. Several existing feature extraction techniques are studied, analyzed, and implemented to extract features from the EEG signals. An SVM classifier is used to classify the features into various emotional states. Four emotional states are detected, namely, happy, sad, anger, and relaxed state. The model is tested, and simulation results are presented with an interpretation. Furthermore, this study has mentioned and discussed the efficacy of the results achieved. The findings from this study could be beneficial in developing emotion-sensitive technologies, such as augmented modes of communication for severely disabled individuals who are unable to communicate their feelings directly.
Date: May 2022
Creator: Choudhary, Sairaj Mahesh
System: The UNT Digital Library
Empirical Correlates of the Personality Assessment Inventory (PAI) in an Outpatient Sample: A Replication and Extension (open access)

Empirical Correlates of the Personality Assessment Inventory (PAI) in an Outpatient Sample: A Replication and Extension

The Personality Assessment Inventory (PAI) has gained widespread favor since its publication. However, validation studies of its interpretive descriptors remained limited to date. As such, the primary goal of the current study aimed at validating the interpretive descriptors through the lens of empirical correlates using the PDSQ as the external criterion. It also served as a replication and extension to the 2018 study conducted by Rogers and colleagues. The final archival sample included 204 clients from the UNT Psychology Clinic who were administered PAI between May 2016 and December 2020. Overall, reliability and construct validity were strongly supported for PAI clinical scales. Further, the current study replicated large majority of the correlates identified by Rogers and colleagues, which boosted the confidence in reproducible interpretations based on empirical correlates. Importantly, investigation of item-level and gendered correlates provided crucial interpretive implications that were otherwise obscured. For example, item-level correlates refined interpretation by clarifying the nature of scale-level correlates, particularly those of moderate strength. On the other hand, notable gender differences were identified for certain scales, which led to drastic differences in patterns of gendered vs. non-gendered correlates. Finally, several important methodological considerations are proposed in hope to facilitate the empirical research concerning …
Date: May 2022
Creator: Pan, Minqi
System: The UNT Digital Library
Engineering Whole Cell-Based Biosensors for Heavy Metal Detection Using Metalloregulatory Transcriptional Repressors of the SmtB/ArsR Family (open access)

Engineering Whole Cell-Based Biosensors for Heavy Metal Detection Using Metalloregulatory Transcriptional Repressors of the SmtB/ArsR Family

This study focuses on engineering whole cell-based biosensors for heavy metal detection. Through the exploitation of metalloregulatory proteins, fabrication of metal ion-responsive biosensors is achieved. Metalloregulatory proteins of the SmtB/ArsR family including arsenite-responsive ArsR, cadmium-responsive CadC, zinc-responsive CzrA, and nickel-responsive NmtR were evaluated as biosensor sensing modules. Characterization of these four metal sensing modules was accomplished through quantification of a reporter green fluorescence protein (gfp) gene. As such, biosensors pCTYC-r34ArsR-pL(ArsOvN)GFP and pCTYC-r34CadC-pL(CadOv1)GFP displayed excellent gfp expression and sensitivity to As(III) and Cd (II), respectively. These two biosensors were consequently selected and successfully implemented in soil bacterium Pseudomonas putida. Lastly, a proof of concept arsenite-responsive genetic toggle switch is proposed utilizing PurRcelR467 (PC47), a cellobiose-responsive gene, and an LAA degradation tag. Overall, this study expands the bank of metalloregulatory bioparts for heavy metal sensing in the aim of constructing an optimized water monitoring system.
Date: May 2022
Creator: Draeger, Alison
System: The UNT Digital Library

Essential and Flexible Expression: Strategies for Pronoun Use among Nonbinary-Identified Individuals

Drawing on in-depth, semistructured interviews with 42 nonbinary-identified individuals in Texas, I examine both the relationship between pronouns and identity and how individuals use pronouns in interaction. Some individuals speak about their pronoun set as a crucial component of their gender identity, adopting what I refer to as an essential expression strategy, while others discuss their pronoun set as more loosely connected to their non-binary identity, adopting what I refer to as a flexible expression strategy. Whether an individual adopts an essential or flexible expression strategy informs pronoun use in a particular context. Specifically, I find that respondents adopting an essential expression strategy are more likely to emotionally invest in using/enforcing a particular pronoun set and report strong emotions from the use of correct or incorrect pronouns in interaction. In contrast, respondents adopting a flexible expression approach are less emotionally invested in a particular pronoun set. As a result, these respondents are more likely to defer pronoun choice to the audience and prioritize the ease of interaction with less emotional consequences.
Date: May 2022
Creator: Moeder, Jessica Elise
System: The UNT Digital Library

An Examination of the Multicultural Representation in Children's Books from Approved Literature Lists in North Texas Public Schools: A Critical Content Analysis

Current events and social movements aimed at bringing awareness to oppressed groups have reminded us that the United States has still not achieved justice and equality for all. Social and political tensions have become inescapable in our increasingly connected world. Therefore, students need to learn about diverse ways of knowing and being in a pluralistic society. Since publishing and education companies compete for business, the amount of digital and print resources available to teachers can be overwhelming. Because a vital component of a multicultural education includes diverse materials that authentically portray views and experiences from a wide range of cultures, traditions, and values, it is necessary to critically analyze the curricular content that teachers are expected to use in their classrooms. The purpose of this study is to analyze the literature that is included in district-approved book lists for public schools to determine how these texts support the principles of multiculturalism and multicultural education in sixth-grade classrooms. The tenets of critical multicultural analysis (CMA) guided this critical content analysis. Because teachers in these districts are limited to choosing books from approved lists to read with their students, the texts for this study were selected from approved literature lists that were …
Date: May 2022
Creator: Edge, Andrea Felice
System: The UNT Digital Library
An Exploration of Coping Mechanisms, Motivations, and Treatment Strategies Among Those with an Opiate Use Disorder (open access)

An Exploration of Coping Mechanisms, Motivations, and Treatment Strategies Among Those with an Opiate Use Disorder

The opioid epidemic is an issue that has ravaged much of the United States, and specifically Appalachia. Many different academic disciplines have attempted to provide a solution to no avail. This ethnographic study investigates the social nature of addiction & recovery related to problematic opiate use. Through semi-structured interviews and participant observation with clients at a drop-in mental health and addiction services center, the study explores the social conditions which facilitate problematic substance use in addition to vetted strategies to reach and maintain active recovery from opiate misuse. The conclusion focuses on how addiction and recovery are inherently social exercises that are heavily influenced by one's social network and the social contexts they live or have lived in. Using an anthropological perspective, this study shows the value that social science and an anthropological perspective in particular, can provide on such a pervasive and unsettling issue.
Date: May 2022
Creator: Jarrett, Zachary Mical
System: The UNT Digital Library

Exploring the Effects of Cultural Consequences Identified through a Ranking Task on the Interlocking Behavioral Contingencies of Ethically Self-Controlled Responses with Participants with Pre-Existing Relationships

This study explored the effects of cultural consequences identified through a ranking task on the selection of interlocking behavioral contingencies and aggregate products constituting ethically self-controlled responses when participants had pre-existing relationships. Two experiments were conducted to explore these effects. Experiment 1 had two triads of three participants each recruited from a university-based autism center. Experiment 2 had three triads of three participants each; participants in Triads 3 and 4 were recruited from a university-based rock-climbing club while participants in Triad 5 were recruited from the same university-based autism center as in Experiment 1. All participants were exposed to a task that involved choosing odd or even rows from a matrix displayed throughout the experimental session. Individual contingencies were programmed in all conditions while metacontingencies were programmed in some conditions. Participants selected the topography of the cultural consequence through a pre-experimental ranking task prior to the onset of the experimental session. A change was made to the experimenter's verbal behavior in all operant and metacontingency conditions for Experiment 2. The results of both experiments indicate that identification of the cultural consequence through a ranking task with participants having pre-existing relationships did have an effect on the continued selection of the …
Date: May 2022
Creator: Elwood, Chelsea Christina
System: The UNT Digital Library
Exploring the Efficacy of Percentile Schedules with the Amplitude of Muscular Contractions (open access)

Exploring the Efficacy of Percentile Schedules with the Amplitude of Muscular Contractions

Percentile reinforcement schedules have been used to systematically alter inter-response times, behavioral variability, breath carbon monoxide levels, duration of social behaviors, and various other properties of behavior. However, none of the previous studies have examined the effectiveness of percentile schedules in relation to the magnitude of muscular contractions. This control over magnitude of muscular responding has important implications relating to the strengthening of muscles and correct movements for patients receiving physical rehabilitation. There would be great utility in percentile schedules that can be implemented in rehabilitation situations by physical therapists and patients themselves to improve treatment outcomes – all of which could be possible without any behavioral training if the procedure is implemented via body sensors and smartphone applications. Using healthy adults and the aforementioned technology, this thesis focused on the design and testing of three percentile reinforcement schedule procedures to increase the strength of the vastus medialis muscle. Results indicate that the magnitude of muscular responses can be shaped using body sensors and contingent feedback, and the percentile schedule procedures have promising applications in the domain of physical therapy.
Date: May 2022
Creator: Goodhue, Rob
System: The UNT Digital Library
Exploring the Narrative and Family Identity Constructions of Adult Children with Visible Disabilities (open access)

Exploring the Narrative and Family Identity Constructions of Adult Children with Visible Disabilities

Using communicated narrative sense-making model and discourse-dependence, the present study examined the retrospective narratives parents told their adult children with visible disabilities in order for them to make sense of their disabilities in their families and to build personal identity. Eleven participants ages 18 to 30 with visible disabilities participated in the study and told retrospective narratives while also relying on internal boundary management strategies to communicate in the family about disability. The results indicated that two narrative content themes emerged: limiting narratives and positive/normalizing narratives. Additionally, a narrative shift was found in narrative structure as some participants got older. Implications for family communication and disabilities, as well as for CNSM and discourse-dependence, are discussed. Finally, future research directions are discussed.
Date: May 2022
Creator: Lyssy, Kendal
System: The UNT Digital Library
The Extended Lydian Locrian Theory of Harmony (open access)

The Extended Lydian Locrian Theory of Harmony

The extended Lydian Locrian theory of harmony (ELL) is a system of analyzing harmonies and progressions according to their position along a vast spectrum of colors. The musical premise is that chords and progressions spanning upwards around the circle of fifths sound brighter, whereas chords and progressions spanning downwards around the circle of fifths sound darker. This simple premise gives rise to a complex but unified system of harmonic structures and relations, a system which provides a valuable tool for analyzing and composing music, especially of advanced tonal genres. ELL not only provides fruitful techniques for analyzing certain kinds of traditional harmonies and progressions but also provides a framework for discovering more exotic and colorful harmonies and progressions.
Date: May 2022
Creator: Bandy, Chris
System: The UNT Digital Library

Fabrication and Testing of Polymeric Flexible Sheets with Asymmetric Distributed Magnetic Particles for Biomedical Actuated Devices

This thesis explores a method to fabricate magnetic membranes with asymmetric distribution of particles and their testing as actuators. Focus of this research is to fabricate thin polymeric sheets and thickness range of 120-125µm, with asymmetric distribution of magnetic nano particles, employing micromagnets during the fabrication. The micromagnets are used to localize the magnetic particles during the curing process at selected locations. The effect of the asymmetric distribution of magnetic particles in the membrane is used for the first time. Magnetite (Fe3O4) is used as the magnetic particles that is embedded into a polymeric membrane made of polydimethylsiloxane (PDMS); the membrane is then tested in terms of deflection observed by using a high-resolution camera. From the perspective of the biomedical application, PDMS is chosen for its excellent biocompatibility and mechanical properties, and Fe3O4 for its non-toxic nature. Since magnetic actuation does not require onboard batteries or other power systems, it is very convenient to use in embedded devices or where the access is made difficult. A comparative study of membranes with asymmetric and randomly distributed particles is carried out in this thesis. The asymmetric distribution of magnetic particles can benefit applications involving localized and targeted treatments and precision medicine.
Date: May 2022
Creator: Bakaraju, Megha Ramya
System: The UNT Digital Library
Fabrication of the Novel Asymmetric Polymeric Materials via Bottom-Up Approach (open access)

Fabrication of the Novel Asymmetric Polymeric Materials via Bottom-Up Approach

Asymmetric polymeric materials can be formed by either top-down or bottom-up methods. Bottom-up methods involve assembling the atoms and molecules to form small nanostructures by carefully controlled synthesis, which results in a reduction of some of the top-down limitations. In this dissertation, thermal, tribological and antireflective properties of polymeric materials have been enhanced by introducing structural asymmetry. The overall performance of commercial polymeric coatings, e.g. epoxy and polyvinyl chloride, has been improved by conducting the blending methods, specifically, chemical modification (α,ω-dihydroxydimethyl(methyl-vinyl)oligoorganosiloxane), cross-linking (triallyl isocyanurate), and antioxidant (tris(nonylphenyl) phosphite) incorporation. The nonequilibrium polymeric structures (moth-eye and square array) have been developed for the ultrahigh molecular weight block copolymers via the short-term solvent vapor annealing self-assembly. The large domain size of the moth eye structure allows for improvement of the light transmittance particularly in the visible and near infrared ranges, while the square arrangement of the block copolymer opens the possibility of magnetic data storage application by the large magnetic nanoparticles' embedment or masking of the superconductors.
Date: May 2022
Creator: Hnatchuk, Nataliia
System: The UNT Digital Library
A First Look at Mankiyali Morphology (open access)

A First Look at Mankiyali Morphology

This thesis is the first comprehensive description and analysis of the inflectional morphology of Mankiyali — an endangered Indo-Aryan language spoken by under 500 people in rural Mansehra District, in Khyber Pakhtunkhwa Province, Pakistan. The study primarily focuses on the morphological patterns involved in inflecting nouns, pronouns, adjectives, and verbs, and discusses the inflectional requirements in forming postpositional and adverbial phrases. With documentary efforts still in early stages and prior research focusing primarily on the phonological characteristics of the language, the study contributes to addressing the absence of linguistic materials available on this language and provides ground for further investigations.
Date: May 2022
Creator: Englert, Eric G
System: The UNT Digital Library
Franz Schubert's op. 59, Performance Edition:  A Vocal Approach for the Novice Bass Tuba Player (open access)

Franz Schubert's op. 59, Performance Edition: A Vocal Approach for the Novice Bass Tuba Player

The purpose of this project is to help bridge the gap of available solos for the novice bass tuba player. It is necessary for the growing tuba player to transition to the bass tuba for solos at the professional level, but the majority of pieces that are written for the bass tuba are at the professional level, and it leaves very little for the transitional phase from a repertoire standpoint. Through transcribing vocal works, an aspiring bass tuba soloist can focus on fundamental aspects of tuba playing like tone quality, breathing, intonation, and musicianship. Generally speaking, tuba solos are written for the contrabass tuba and accessible to late high school and early college musicians, or they are written at the professional level for bass tuba. There is a gap in the repertoire for the solo tuba, pieces that can help transition young students to the later repertoire demands of the bass tuba. This project will address the need for more novice solo works accessible to the young collegiate tubists transitioning to the bass tuba by identifying current deficiencies in the repertoire available for the developing solo tubist. This project concludes with a transcription and performance edition of Franz Schubert's Op. …
Date: May 2022
Creator: Humphreys, David Kyle
System: The UNT Digital Library
French and Canadian Inclusive Language Doctrine and Societal Attitudes (open access)

French and Canadian Inclusive Language Doctrine and Societal Attitudes

One of the most important French grammar rules is the rule of superiority: Masculine subjects always trump feminine subjects when there are multiple subjects. Superiority is closely followed by the acceptance that all nouns have a grammatical gender, either masculine or feminine. Since 1984, and over the span of forty years, these rules have been challenged on multiple levels of French society. The research conducted over the course of this thesis focuses on the mentality and reactions of the French people towards inclusive language made up of inclusive writing campaigns, the feminization of traditionally masculine names, career positions, and titles, and the introduction of gender-neutral forms of conjugating and neo-pronouns. The studied responses are be categorized into those of the French government, the Académie Française, as well as those from the Canadian government and the Office québécois de la langue française. Research demonstrates the existence of a clear division between "traditionalist" and progressive values at work within the afore-mentioned levels of French societal attitudes. While official government publications and committees seem to reflect a positive attitude towards the adoption of feminized terms, the lack of support for inclusive writing systems by the government contradicts this. This thesis outlines these responses …
Date: May 2022
Creator: Diaz, Taylor Irene Berthiaume
System: The UNT Digital Library

From Juno to the Virgin of Guadalupe: Gender and Race in Colonial Mexico

This thesis examines the changes Spain was forced to make toward their colonial patterns due to Nahua resistance. Each chapter assesses different periods during the colonial era, tracing how the Virgin of Guadalupe's meaning changed according to Spanish colonial needs.
Date: May 2022
Creator: Garza, Jesus Mauricio
System: The UNT Digital Library
Gender Role Conflict and Religion/Spirituality (open access)

Gender Role Conflict and Religion/Spirituality

Relatively few studies have explored the relationship between gender role conflict (GRC) and an individual's religious/spiritual identities. This study sought to add to the research on GRC by exploring the experiences of female and male GRC, and expand the understanding of the influence of religion/spirituality (R/S) variables on GRC. Participants (N = 359) were recruited from social media and undergraduate courses and completed an online survey that assessed GRC, a variety of R/S variables, and life satisfaction. Overall, there were some significant differences found between male and female experiences of GRC. In general, the R/S variables did not have a large impact on GRC. However, religious fundamentalism and extrinsic and quest religious orientations were related to specific subscales of GRC. Maintaining congruency between one's personal values and one's religious institution was related to lower levels of specific subscales of GRC. Additionally, GRC was related to lower levels of life satisfaction. Regarding the subscales of GRC, restrictive emotionality was the strongest predictor of lower life satisfaction. By furthering research on the interplay between GRC and R/S, clinicians will be more equipped to handle the repercussions of stereotypical roles within gender and religion, address negative attitudes and behaviors, and lead discussions about …
Date: May 2022
Creator: Norton, Jolene
System: The UNT Digital Library

Goering's Boys in Blue: The Luftwaffe Field Divisions, 1942-1945

The Luftwaffe Field Divisions have remained on the periphery of World War II historiography for over seventy years, overshadowed by the myth of German military excellence during the conflict. The Heer is still known for lightning-quick attacks, brutal firepower, ably trained soldiers, and formidable success on the battlefield; an army of almost faceless, remorseless pain that grimly and efficiently faced down the Allies until the very end. Only recently, flaws have begun opening in this pristine picture as historians have examined how quickly the quality of the German army deteriorated from 1942-onward. Despite the vast landscape of scholarship on the war and the recent historical analysis of the weaknesses the Germans suffered, serious study on the creation and management of the Luftwaffe Field Divisions has been sparse. What has been written about them since 1945 has done little to offer a full picture of the units, their creation, or their significance to the German war effort. The purpose of this study was to fulfill this need by answering the necessary questions about the divisions, provide a complete history of the units, and place the LwFDs properly within the historiography of the Second World War.
Date: May 2022
Creator: Stout, Michael John
System: The UNT Digital Library
Gradient-Index Metamaterial Infrared Detector for Enhanced Photo-Response and Image Quality (open access)

Gradient-Index Metamaterial Infrared Detector for Enhanced Photo-Response and Image Quality

An enhanced thermal imaging concept made possible through the development of a gradient-indexed metamaterial infrared detector that offers broadband transmission and reflection in THz waves. This thesis proposes a proof of feasibility for a metamaterial infrared detector containing an anti-reflective coating with various geometrically varying periodic metasurfaces, a gradient-indexed dielectric multilayer for near-perfect longpass filtering, and a gradient index of refraction (GRIN) metalens for enhanced focal plane thermal imaging. 2D Rigorous Coupled-Wave Analysis (RCWA) is used for understanding the photonic gratings performance based on material selection and varying geometric structure. Finite Difference Time Domain (FDTD) is used to characterize performance for a diffractive metalens by optimizing the radius and arrangement of cylindrical nanorods to create a desired phase profile that can achieve a desired focal distance for projections on a detector for near- to far-infrared thermal imaging. Through combining a micromachined anti-reflective coating, a near-perfect longpass filter, and metamaterial GRIN metalens, infrared/THz focal plane thermal imaging can obtain faster photo-response and image quality at targeted wavelengths, which allows for scientific advancements in electro-optical devices for the Department of Defense, aerospace, and biochemical detection applications.
Date: May 2022
Creator: Adams, Kelsa Derek
System: The UNT Digital Library
Guåhan: A (De)Colonial Borderland (open access)

Guåhan: A (De)Colonial Borderland

Answering the call to decenter whiteness and coloniality within communication studies (#RhetoricSoWhite), this project attempts to reclaim space for indigenous knowledge and to serve decolonial struggles. Written as a project of love for my fellow indigenous scholars and peoples, I expand upon Tiara Na'puti's conceptualization of "Indigeneity as Analytic" and chart how indigenous Pacific Island decolonial resistance operates through a paradigm of decolonial futurity. By recognizing Guåhan (Guam), as well as Chamoru, bodies as (de)colonial borderlands, I demonstrate the radical potential of indigeneity through three different case studies. First, I name indigenous feminine style as a strategic mode of public address adopted by Governor Lou Leon Guerero to resist the spread of COVID-19 by US military personnel on the island of Guåhan. Second, I showcase how the process and practice of indigenous Pacific Island tattooing delinks away from coloniality. Finally, I demonstrate how the celebration of a Chamoru saint, Santa Marian Kamalen, provides a spatial-temporal intervention that articulates an indigenous religion and enacts a decolonial futurity.
Date: May 2022
Creator: Torre, Joaquin Vincent, Jr.
System: The UNT Digital Library
Herb Users' Nondisclosure of Complementary-Alternative Medicine Use to Health Care Providers (open access)

Herb Users' Nondisclosure of Complementary-Alternative Medicine Use to Health Care Providers

Various forms of complementary and alternative medicine (CAM) are increasingly being used in the United States and globally over time. Among CAM, natural products, including herbal medicines, are the most used type. However, the increase in the use of CAM has gone on with minimal or without a corresponding increase in the rate of disclosure of use to the health care providers. The theories of care-seeking behavior and the behavioral model of health services use guided most of the study. Data from the 2012 National Health Interview Survey were analyzed to determine the health factors that affect the nondisclosure of herbal medicine usage by respondents (N = 423) who used herbs as their first choice of CAM therapy. Data were analyzed using descriptive statistics and a binary logistic model. About one quarter of herb users did not disclose their use of herbs to the health care provider. Nondisclosures were likely to be associated with herb users who also used homeopathy and those who used herbs to treat diseases that are usually short-term. The nondisclosure rate of the use of CAM, including herbal therapy, remains a recurring concern. As part of the practical implications, the study creates and supports the awareness …
Date: May 2022
Creator: Obiora, Justice Echezona
System: The UNT Digital Library

High-Immersion Virtual Reality for Language Learning

This manuscript-style dissertation consists of three publications interconnected in their focus on the dynamically evolving use of immersive virtual reality technologies for language education. The manuscripts included in this dissertation were adapted from three research papers published or submitted for publication in scientific journals and book chapters. The first manuscript provides an overview of immersive technologies of different levels of immersion, ranging from 2D displays on a flat screen to highly immersive interactive experiences rendered in virtual reality using head-mounted displays. The second manuscript is a systematic review, and it narrows down the scope of immersive technologies outlined in the previous publication by exploring existing research on the technologies related to the highest level of immersion for language learning, namely the high-immersion virtual reality technologies. The third manuscript continues to investigate the application of those technologies for language learning, but the focus is shifted from examining virtual reality applications to exploring language teachers' beliefs about using those technologies. This dissertation offers a comprehensive overview of high-immersion virtual reality use for language learning which may serve as an ideal starting point for researchers and educators interested in learning more about the current state of virtual reality integration in schools from the …
Date: May 2022
Creator: Kucher, Tetyana
System: The UNT Digital Library

How Much Does Sleep Vary from Night to Night? A Quantitative Summary of Intraindividual Variability in Sleep by Age, Gender, and Racial/Ethnic Identity

Habitual (i.e., average or typical) sleep duration and sleep efficiency vary widely by demographic characteristics, including age, gender, and racial/ethnic identity. Despite a wealth of studies on demographic patterns in habitual sleep, these results are often based on cross-sectional surveys, which ask participants to retrospectively recall their "typical" or "recent" sleep. Yet, sleep is a highly dynamic behavior and may fluctuate substantially from night-to-night. This intraindividual variability (IIV) in sleep/wake patterns can be captured a multitude of ways, most commonly by using formula-based calculations. Although there is growing attention on the importance of IIV in sleep, findings on demographic differences are still inconclusive, and there are no guidelines for typical values of IIV in sleep. The present study quantitatively synthesized 8 international data sets (N = 2847 participants, 29,832 total days of sleep data), focusing on examining age, gender, and racial/ethnic identity differences in IIV in sleep measured via sleep diaries, actigraphy, and electroencephalography. Sleep duration and sleep efficiency varied widely from night-to-night within people (duration: 64-119 minutes; efficiency: 5-8%). Different metrics of IIV were strongly correlated within and across sleep measurement types. Younger adults had more IIV in diary and actigraphy sleep duration. Gender differences in IIV in sleep …
Date: May 2022
Creator: Messman, Brett A
System: The UNT Digital Library

Ideal Hausmusik: Brahms's Vocal Quartets (opp. 31, 52, 64, 65, 92, 103, and 112) and the Politics of Domestic Music ca. 1848-1900

This dissertation contextualizes Brahms's vocal quartets within a largely forgotten discourse about Hausmusik that flourished in German-speaking lands in the second half of the nineteenth century. In numerous texts about Hausmusik from ca. 1848-1900, authors conceived the genre as an aesthetically and politically conservative expression of German identity and connected its accessible style to an ideal of social cohesion in the pre-industrial age. Similar issues of national identity and musical style arise in the reception of Brahms's quartets, which, I contend, was informed by the works' generic status as Hausmusik. Critics either praised Brahms's works for their simple, folk-like style or disparaged their complexity, artifice, and foreignness. Ultimately, I argue, Brahms sought to elevate the genre of Hausmusik in his vocal quartets by integrating aesthetic and cultural values associated with this genre with a more sophisticated musical style. The works' stylistic and generic ambiguity and the disparity in critics' responses reveal competing aesthetic, political, and cultural world views immediately before and after German unification. Chapter 2 shows how discourse about Hausmusik constructed German identity in the private sphere by promoting a folk-like aesthetic and accessible musical style over the perceived cosmopolitanism and commercialism of Salonmusik and other repertoires. Chapter 3 …
Date: May 2022
Creator: Anderson, Robert Michael
System: The UNT Digital Library