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Human Perception Of Piano Timbre Variations Relative To The Piano's Dynamic Range, Pitagoras Goncalves
Human Perception Of Piano Timbre Variations Relative To The Piano's Dynamic Range, Pitagoras Goncalves
LSU Doctoral Dissertations
The purpose of this study was to investigate the perception of brightness as it relates to loudness variations in piano tone. A single note was recorded with multiple intensities and used as the stimuli. I normalized all recorded notes to be perceived with the same volume and with the same duration. Consequently, the tone quality could be evaluated without the influence of loudness. Professional musicians and music students were invited to participate. I designed a mechanical apparatus, which produced a measured amount of force applied to the piano key. This device was used to record an intensity range of approximately …
Damage Prediction Of Low-Rise Buildings Under Hurricane Winds, Fang Pan
Damage Prediction Of Low-Rise Buildings Under Hurricane Winds, Fang Pan
LSU Doctoral Dissertations
Low-rise buildings are defined as the buildings with a mean roof height less than the least horizontal dimension and less than 18.3 m in ASCE 7-10. They represent the majority of commercial, residential, and industrial buildings. Approximate 90% of the existing low-rise residential buildings are constructed as wood light-frame buildings that are not fully engineered and thus more vulnerable to extreme wind pressures, wind borne debris and rain water intrusion. The resulting hurricane-induced economic loss is primarily attributed to the insufficient performance of building envelope instead of the catastrophic failure of their main structural system for Category 1 to 4 …
A Case Study Analysis Of Web 2.0 Technology Use In Higher Education: Effects Of Using A Wiki On Outcomes And Attitudes In Legal Education, Patrick Allan Smith
A Case Study Analysis Of Web 2.0 Technology Use In Higher Education: Effects Of Using A Wiki On Outcomes And Attitudes In Legal Education, Patrick Allan Smith
LSU Doctoral Dissertations
Using a case study methodology with descriptive and qualitative techniques at a major law school in the South, this research study explored factors that contribute to the perceived pedagogical value of wiki technology in legal education, as well as attitudes and perceptions of law faculty and students regarding the effectiveness of using wikis as a productivity tool for improving outcomes in authentic group activities in a collaborative environment in legal education. This study also explored the dynamics of the interactions that occurred among users while utilizing wiki technology over a 6-week period. The results suggest that law students exhibit a …
The Role Of Histone Methyltransferases In Determining Developmental Potential Of Bovine Oocytes, Jairo Alberto Sarmiento
The Role Of Histone Methyltransferases In Determining Developmental Potential Of Bovine Oocytes, Jairo Alberto Sarmiento
LSU Doctoral Dissertations
Histone proteins are proteins found in eukaryotic cells that associate with DNA to form the most basic structural unit of chromatin, called nucleosomes. The post-translational modifications of histones regulate developmental competence in bovine oocytes and early embryos. The difference in developmental competence between in vitro matured oocytes and in vivo matured oocytes was used to investigate the accumulation of transcripts for histone methyltransferases (HMTs) during oocyte maturation. Methyltransferases ASH1L, EHMT2, SUV39H1 and KDM6B were selected as genes of interest. Transvaginal ultrasound-guided aspiration (TUGA) was used to collect immature and in vivo matured bovine cumulus-oocyte complexes (COCs). Immature COCs collected via …
Pro-Inflammatory Cytokines Induce Lipocalin-2 Expression In Vivo And In Vitro, Peng Zhao
Pro-Inflammatory Cytokines Induce Lipocalin-2 Expression In Vivo And In Vitro, Peng Zhao
LSU Doctoral Dissertations
Chronic inflammation in adipose tissue has been demonstrated to play an important role in the pathogenesis of insulin resistance. The infiltration of immune cells results in a significant increase of pro-inflammatory cytokines in adipose tissue that substantially affects adipocyte function. Lipocalin-2 (LCN2) is an adipocyte-secreted cytokine whose expression and secretion has been shown to be induced in obesity and insulin resistance in mouse and man. However, the underlying mechanisms have not been explored. Our studies indicate that interferon-gamma (IFNã) and tumor necrosis factor-alpha (TNFá), two primary pro-inflammatory cytokines secreted from immune cells, can induce LCN2 expression and secretion from adipocytes …
Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson
Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson
LSU Doctoral Dissertations
This research study addressed teachers’ perceptions of the use of social networking via mobile devices and the impact that social media accessed via mobile devices has on the learning engagement of students in grades 9-12 in select Louisiana high schools, in a rural southern parish of the United States (Gibbs, 2012). The study examined teachers’ perceptions of whether or not the use of social media improved students’ engagement in learning activities. Some researchers assert that the use of social media and smart cell phones is both the current and future mode of communication and that educators would do well to …
Parallel Processes In Hpx: Designing An Infrastructure For Adaptive Resource Management, Vinay Chandra Amatya
Parallel Processes In Hpx: Designing An Infrastructure For Adaptive Resource Management, Vinay Chandra Amatya
LSU Doctoral Dissertations
Advancement in cutting edge technologies have enabled better energy efficiency as well as scaling computational power for the latest High Performance Computing(HPC) systems. However, complexity, due to hybrid architectures as well as emerging classes of applications, have shown poor computational scalability using conventional execution models. Thus alternative means of computation, that addresses the bottlenecks in computation, is warranted. More precisely, dynamic adaptive resource management feature, both from systems as well as application's perspective, is essential for better computational scalability and efficiency. This research presents and expands the notion of Parallel Processes as a placeholder for procedure definitions, targeted at one …
Recalled Bullying: Development Of A Measure To Identify Childhood Victims And Perpetrators By Adults, Melissa Munson
Recalled Bullying: Development Of A Measure To Identify Childhood Victims And Perpetrators By Adults, Melissa Munson
LSU Doctoral Dissertations
The purpose of the study was to develop a psychometrically sound measure of recalled childhood bullying by adults who were either victims or perpetrators of this behavior. In order to accomplish this, a measure of childhood bullying, the Peer Interactions in Primary School (PIPS) Questionnaire, was modified into a retrospective measure in order to quantify recollections of childhood bullying by adults. Specifically, the modified PIPS (PIPS-R) was created to identify adults who identified themselves as bullies, victims, or bully-victims during their childhood or who do not recall having been a bully or a victim. Eight hundred and twelve undergraduate college …
Liberalism And The Dilemma Of Cultures, Ali Rezaie
Liberalism And The Dilemma Of Cultures, Ali Rezaie
LSU Doctoral Dissertations
In this project, through a closer examination of the controversies over Monica Ali’s Brick Lane (2003), Khaled Hosseini’s The Kite Runner (2003) and Azar Nafisi’s Reading Lolita in Tehran (2003), I seek to identify the elements of a defensible postcolonial vision. While postcolonialism is afflicted with many problematic assumptions, the exclusively liberal perspective which these authors seek to reaffirm in its place has its own plethora of defects. Ali, Hosseini and Nafisi merit a closer attention not only for their exposing some of the flawed views underlying postcolonialism but also for their demonstrating why an unqualified reversion to liberalism may …
Bande Dessinée Récit De Voyage: Shifting History, Semiotics, Authorship, And Representation In Autobiographical Francophone Comics Travel Narratives, Brandon Matthew Thomas
Bande Dessinée Récit De Voyage: Shifting History, Semiotics, Authorship, And Representation In Autobiographical Francophone Comics Travel Narratives, Brandon Matthew Thomas
LSU Doctoral Dissertations
This work classifies and critiques several aspects of Francophone travel narratives in the comics medium according to four parameters. First, this analysis identifies a history of the usage of 'travel' as a theme, as an integral character, and as a narrative construct. Second, this project addresses the history of semiotic approaches to Francophone comics to the present day as well as demonstrates a few semiotic approaches that have had considerable attention and some that critics have not as yet exploited sufficiently. I use the poetic term of 'allusion' in comics travel narratives in the creation of another semiotic layer that …
The Role Of Recursive Remindings On Memory Updating Of Emotional Stimuli, Tanya Karam
The Role Of Recursive Remindings On Memory Updating Of Emotional Stimuli, Tanya Karam
LSU Doctoral Dissertations
It has been argued that emotional memories are harder to update than neutral memories (Novak & Mather, 2009; Sakaki, Niki, & Mather, 2012) and that the cause is that emotional memories are subject to greater levels of proactive interference. This explanation was questioned in this paper and another explanation – the recursive reminding hypothesis (Hintzman, 2004) was considered. This hypothesis was used to explain the previous findings by suggesting that the remindings embedded in emotional memory representations are stronger than neutral remindings (as supported by a preliminary experiment) and therefore attract attention internally during re-presentation, resulting in less attention toward …
Examining The Boundary Conditions Between Cognitive Control And Interference Derived From Stimulus-Based And Response-Based Conflict, Jonathan D. Tall
Examining The Boundary Conditions Between Cognitive Control And Interference Derived From Stimulus-Based And Response-Based Conflict, Jonathan D. Tall
LSU Doctoral Dissertations
Cognitive control is a broad construct that defines a set of processes involved in maintaining task goals in response to interference. Working memory capacity (WMC) is a similarly defined construct that shares many overlapping functions with cognitive control. The studies presented used controlled forms of interference to identify limits, or boundary conditions, that could help clarify the relationship between cognitive control and WMC. Experiment 1 used context effects to manipulate how interference and cognitive control could overlap. A spatial Stroop/Simon task was used in which proportion congruency for each subset (e.g., Simon or spatial Stroop) was manipulated to produce a …
A Persistent Storage Model For Extreme Computing, Shuangyang Yang
A Persistent Storage Model For Extreme Computing, Shuangyang Yang
LSU Doctoral Dissertations
The continuing technological progress resulted in a dramatic growth in aggregate computational performance of the largest supercomputing systems. Unfortunately, these advances did not translate to the required extent into accompanying I/O systems and little more in terms of architecture or effective access latency. New classes of algorithms developed for massively parallel applications, that gracefully handle the challenges of asynchrony, heavily multi-threaded distributed codes, and message-driven computation, must be matched by similar advances in I/O methods and algorithms to produce a well performing and balanced supercomputing system. This dissertation proposes PXFS, a storage model for persistent objects inspired by the ParalleX …
A Qualitative Study Utilizing Non-Fiction African-American Folktales: Process And Product With Struggling Second, Third, And Fifth Graders In North Louisiana, Gail Guidry Griffin
A Qualitative Study Utilizing Non-Fiction African-American Folktales: Process And Product With Struggling Second, Third, And Fifth Graders In North Louisiana, Gail Guidry Griffin
LSU Doctoral Dissertations
This dissertation presents a qualitative of a study utilizing non-fiction African-American Folktales with struggling readers in second, third, and fifth grades. The study was conducted to explore how teachers, reading/library media specialists, and students utilize a variety of non-fiction folktales in their classrooms and the library media center. From this topic the following research questions were devised. The researcher discovered the challenges that teachers are faced with the implementation of folktales, how is folktales aligned with the (CCSS) Common Core State Standards, what role do heroes play in folktales, and what traits and/or characteristics would students prefer their hero to …
Does Subtype Matter?: Comparing The Effects Of A Self-Monitoring Intervention On Adhd-C And Adhd-I, Caleb James Corwin
Does Subtype Matter?: Comparing The Effects Of A Self-Monitoring Intervention On Adhd-C And Adhd-I, Caleb James Corwin
LSU Doctoral Dissertations
Recently Attention-Deficit/Hyperactivity Disorder (ADHD) research has been confronted with questions regarding the subtype distinctions. Millich, Ballantine, and Lyman (2001) have claimed that ADHD – Combined Type (ADHD-C) and ADHD – Predominantly Inattentive Type (ADHD-I) are “distinct and separate disorders.” As important as this distinction is diagnostically, it is, possibly equally important with regards to treatment. Multiple pharmacological studies have compared the responsiveness of ADHD-C and ADHD-I to stimulant medications, yet the results are often conflicting (e.g. Grizenko, Paci, & Joober, 2010; Solanto et al., 2009; Stein et al., 2003). To date, only one study has compared ADHD subtypes with respect …
Exchange Rate Volatility Effects On Brics Countries Exports, David Isaias Maradiaga Pineda
Exchange Rate Volatility Effects On Brics Countries Exports, David Isaias Maradiaga Pineda
LSU Doctoral Dissertations
The leaders of the leading emerging economies Brazil, Russia, India, China, and South Africa (BRICS) claim that increased currency exchange rate volatility (CERV) from USD, EUR, and JPY (G-3) negatively impacts their exports, and expressed their desire for less trade dependence on these currencies. The literature on the impact of CERV on trade is vast. However, no consensus on the impact’s direction and significance has been reached yet. The motivation of this study was: first, to contribute to the existing empirical literature by using an alternative methodology; and second, to provide empirical evidence to the claim’s validity or nullity by …
The Role Of Viral Glycoproteins And Tegument Proteins In Herpes Simplex Virus Type 1 Cytoplasmic Virion Envelopment, Dmitry Vladimirovich Chouljenko
The Role Of Viral Glycoproteins And Tegument Proteins In Herpes Simplex Virus Type 1 Cytoplasmic Virion Envelopment, Dmitry Vladimirovich Chouljenko
LSU Doctoral Dissertations
Herpes simplex virus type 1 (HSV-1) is a ubiquitous neurotropic alphaherpesvirus transmitted by contact with mucocutaneous surfaces of infected individuals. HSV-1 enters the host by fusion of the viral envelope with the host cell plasma membrane, followed by translocation of the viral capsids to the nucleus where viral DNA is injected into the host cell nucleus to initiate viral replication. To generate infectious virions, newly assembled capsids travel to the cytoplasm and undergo a process called secondary envelopment by budding into cytoplasmic vesicles derived from the trans-Golgi network. Cytoplasmic envelopment is a complex process involving interactions between a multitude of …
Contractional Tectonics: Investigations Of Ongoing Construction Of The Himalaya Fold-Thrust Belt And The Trishear Model Of Fault-Propagation Folding, Hongjiao Yu
LSU Doctoral Dissertations
This dissertation focuses on the kinematic evolution of contractional tectonics: the Himalayan fold-thrust belt along the collisional orogenic belts, and growth of the basement-cored monoclines in Colorado Plateau. Ongoing Himalayan growth is generally thought to be dominated by duplexing and/or extrusion processes. Duplexing models highlight accretion of material from the subducting plate to the over-riding orogenic wedge, whereas extrusion models focus on up-dip translation of a block bounded by out-of-sequence faults. Here, a primary outstanding question involves the uncertain relationship of the Berinag thrust and the Tons thrust, structures with displacements of >80 km and >40 km, respectively. The uncertainty …
Prevalence Of Campylobacter Jejuni In Small-Scale Broiler Operations And The Effects Of Sulfadimethoxine Administered To Control C. Jejuni Infection In Broilers, Wannee Tangkham
LSU Doctoral Dissertations
Campylobacter spp. particularly C. jejuni has been recognized as one of the most prevalent causes of foodborne bacterial illnesses in humans. Most previous studies have focused on the transmission routes of C. jejuni from commercial flock farms to the final retail product. To date, no in vivo studies have addressed the efficacy of sulfadimethoxine in the control of C. jejuni in poultry. This dissertation research proceeds along two lines of investigation. The objectives of the first line of investigation are to determine the enumeration of Campylobacter spp. and the prevalence on both Campylobacter spp. and C. jejuni on live egg …
The Anti-Inflammatory Effects Of Vitamin D And Exercise, Laura Ann Forney
The Anti-Inflammatory Effects Of Vitamin D And Exercise, Laura Ann Forney
LSU Doctoral Dissertations
Elevated inflammation is associated with several chronic diseases, including obesity. Exercise is an established effective treatment of this condition by decreasing adiposity and independently regulating inflammatory pathways. The potential for vitamin D to confer anti-inflammatory benefits has been explored in cell culture studies, but few have explored its action at the whole body level. PURPOSE: To investigate the relationship between inflammatory markers in trained and untrained individuals with vitamin D levels either above or below a suggested optimal concentration. METHODS: College-aged females (N = 63), both trained and untrained, reported to the lab four times: to assess body size and …
Palatable Foods For A Methionine Restricted Diet, Gabriela Melissa Crespo Gutierrez
Palatable Foods For A Methionine Restricted Diet, Gabriela Melissa Crespo Gutierrez
LSU Doctoral Dissertations
Protein oxidation results in loss of tryptophan, oxidation of cysteine to cysteic acid, oxidation of methionine to methionine sulfoxide and ultimately to methionine sulfone. Methionine sulfoxide has been shown to be completely unavailable to mammalian cells and promote improved insulin sensitivity, lifespan extension, weight loss induction and reduce tumor growth in rat studies. Casein was oxidized with ozone or hydrogen peroxide to reduce the cysteine and methionine levels for use in sulfur amino acid restricted diets. Casein was isoelectrically precipitated from skim milk and oxidized with hydrogen peroxide at various pH levels, from 2.5–11. Two strong oxidizers were used: hydrogen …
Multivariate Generalizability Of Writing Curriculum-Based Measurement (Cbm): An Examination Of Form, Occasion, And Scoring Method, Katherine Hunter Chenier
Multivariate Generalizability Of Writing Curriculum-Based Measurement (Cbm): An Examination Of Form, Occasion, And Scoring Method, Katherine Hunter Chenier
LSU Doctoral Dissertations
Curriculum-based measurement (CBM) is an assessment technique that has become increasingly popular in schools, gaining importance with the recent national emphasis on school and teacher accountability for student achievement. CBM is used to monitor student performance to provide an indicator of which students are at-risk of not achieving grade level standards and thus are in need of intervention. CBM is easy to administer, utilizes standard procedures, and provides measures indicative of general achievement in various domains. The utility of CBM to measure student ability in writing has been well-established. However, there is a paucity of technical adequacy research for writing …
The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe
The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe
LSU Doctoral Dissertations
Distracted driving continues to remain a cause of concern for a number of bodies, including government agencies, traffic safety advocacy groups and law enforcement agencies, because of its traffic safety risks. The driving simulator continues to be popular with researchers in collecting data on performance variables that provide scientific knowledge of the effects of distracted driving. Several of these performance variables can be used to quantify a single distracting effect, resulting in a multivariate dataset. A literature review of related studies revealed that researchers overwhelmingly use univariate (single and multiple) tests to analyze the resulting dataset. Performing multiple univariate tests …
Coworking: Crafting Lives Alongside Each Other, Claire Frances Taylor
Coworking: Crafting Lives Alongside Each Other, Claire Frances Taylor
LSU Doctoral Dissertations
Coworking is a form of alternative work arrangement in which communities of individuals share common office and work space but are most often employed by different employers within different fields/industries (Foertsch, 2011). Despite its growing prevalence, coworking is nearly absent from the organizational literature. The present mixed methods study introduced and defined the construct of extent of coworking. Extent of coworking is conceptually defined in this research as the degree to which an individual spends her/his workweek coworking. Qualitative literature review was conducted to establish this construct, and qualitative interview data provided support for the definition. Using job crafting and …
Neutron Scattering Studies Of Unusual Spin Structure And Local Correlation In Complex Oxides, Dalgis Mesa
Neutron Scattering Studies Of Unusual Spin Structure And Local Correlation In Complex Oxides, Dalgis Mesa
LSU Doctoral Dissertations
Complex correlated electron materials (CEMs), such as transition-metal oxides with exotic properties and novel functionalities, present immense opportunities and formidable challenges in condensed matter physics, materials science, and engineering. These systems are characterized by a multitude of competing ground states that result from the close coupling between charge, lattice, orbital, and spin degrees of freedom, which can be tuned by chemical substitution, strain induction, or by the application of external stimulus (e.g. pressure, temperature, electric, or magnetic fields). Interest in CEMs is fueled by the richness of their novel properties (e.g. Colossal Magnetoresistance (CMR), Quantum Criticality, and High Temperature Superconductivity), …
Piezoelectric Based Energy Harvesting On Low Frequency Vibrations Of Civil Infrastructures, Ye Zhang
Piezoelectric Based Energy Harvesting On Low Frequency Vibrations Of Civil Infrastructures, Ye Zhang
LSU Doctoral Dissertations
Piezoelectric-based energy harvesting is an efficient way to convert ambient vibration energy into usable electric energy. The piezoelectric harvester can work as a sustainable and green power source for different electric devices such as sensors and implanted medical devices. However, its application on civil infrastructures has not been fully studied yet. This dissertation aimed to study and improve the piezoelectric-based energy harvesting on civil infrastructures, especially on bridge structures. To reach the objective, a more accurate model for piezoelectric composite beams was built first, which can be adopted for the modeling of different kinds of energy harvesters. The model includes …
Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton
Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton
LSU Doctoral Dissertations
A sample stage for characterizing photoactive materials was developed for studies with scanning probe microscopy (SPM). A sample stage was designed that directs light from a solar simulator via a fiber optic cable to illuminate the sample. Current-sensing and photocurrent measurements can be acquired with a conductive tip. The designed photocurrent stage can be used for SPM systems with a tip-mounted scanner. Current-sensing measurements can be taken with or without illumination to measure the current produced from organic photovoltaic (OPV) or photoconductive samples. Topography, lateral force and current-sensing images are acquired simultaneously, providing information of how nanoscale morphology affects the …
An Intersectional Exploration Of Race And Gender: Perceptions Of Women Faculty In Higher Education, Amy Hill Bourgeois
An Intersectional Exploration Of Race And Gender: Perceptions Of Women Faculty In Higher Education, Amy Hill Bourgeois
LSU Doctoral Dissertations
My own past experiences and my doctoral work form the origin from which I have chosen to examine the relationship that exists between race-based experiences and gender identity experiences within women faculty members in higher education. Multiple studies that examine faculty members’ experiences related to race and gender-related issues were identified; however, these studies were specific to non-white women. I was unable to locate studies that are inclusive of race and gender experiences of white women, and I am interested in gaining a parallel sense of understanding of the relationship that exists between race and gender in order to draw …
The Control Of Amplitude And Direction In Bimanual Coordination, Zhujun Pan
The Control Of Amplitude And Direction In Bimanual Coordination, Zhujun Pan
LSU Doctoral Dissertations
Spatial coordination of bimanual movements is important when performing daily activities. Whereas, older adults and individuals with Parkinson’s disease (PD) commonly show difficulties in temporally coordinating the hands in bimanual coordination tasks, the effects of aging and Parkinson’s disease on the quality of spatial coordination between the hands are unclear. Thus, the present work investigated the impact of older age and PD on the spatial interference in a bimanual task in which 48 right hand-dominant participants (16 young adults, 16 older adults and 16 individuals with PD) drew simultaneously two lines with both hands with varied movement amplitudes (3 and …
Bio-Imprinted Hydro-Gels (Bigs) For Protein And Virus Detection, Wei Bai
Bio-Imprinted Hydro-Gels (Bigs) For Protein And Virus Detection, Wei Bai
LSU Doctoral Dissertations
Detection of bio-markers at low concentration is becoming a more and more important topic in scientific research due to its importance in applications crucially related to people’s life like medical diagnosis, environment protection and national security. In the past decades, as the improvement of the modern analytical technologies progressed, plenty of methodologies have been developed to realize the fast and accurate detection of bio-markers in liquid media. However, some drawbacks still remain like the expensive cost, high requirement of operational environment, and need for skilled operators. Here, a new kind of aptamer-based bio-imprinted hydrogel sensor (BIG) with specific macroscopic volume …