Digital Commons Network^™

The Religious Impact: Understanding The Influence Of Religiosity On Attitudes Toward Policy Issues, Angela Farizo Mccarthy

LSU Doctoral Dissertations

The purpose of this dissertation is to shed light on the influence of religion on Americans’ attitudes toward policy concerns. How do denominational affiliation, religious participation, and religious beliefs influence one’s views on social and/or economic policies? I consider the impact of religious belonging, religious behaving, and religious believing—also known as the “3B’s” – on public opinion toward contemporary issues in the United States. In this comprehensive analysis, I discover the importance of including the religious dimensions in models of public policy attitudes. The first part of this project is to outline the current state of the literature and present …

"If They Don't Tell You, The Hair Will": Hair Narrative In Contemporary Women's Writing, Darina Pugacheva

LSU Doctoral Dissertations

The history of colonial and racial oppression made hair stories and testimonials fundamental to understanding hair as a unifying element particular for women of African descent in the post-slavery era. Seen as such, their hair narrations provide the first-person perspective of their life experiences while at the same time inviting a critical investigation of colonial and racial oppression. Contemporary women writers develop these types of narrations into a special language of hair that helps them tell a story that is not apparent or straightforward. This literary device that uses hair to uncover deeper social and political issues is bound up …

Hourly Precipitation Climatology Of The Southeast United States, Vincent Brown

LSU Doctoral Dissertations

Precipitation changes are one of the most important potential outcomes of a warming climate because of how essential it is to society and ecosystems. Sub-daily precipitation time series provide more information on precipitation characteristics, particularly frequency, intensity, and duration compared to daily data. In a series of four peer-reviewed manuscripts, this research investigates sub-daily precipitation characteristics from a climatological perspective. The first study introduces a climatology of hourly precipitation for four first-order weather stations across Louisiana, explores possible changes in the hourly precipitation distribution, and links winter Gulf of Mexico sea surface temperatures to the frequency of hours with precipitation. …

Near Infrared Gumbos And Nanogumbos For Biomedical Applications, Mi Chen

LSU Doctoral Dissertations

Recent advances in development of nanomaterials have provided great opportunities for cancer research. In this dissertation, nanoGUMBOS derived from a group of uniform materials based on organic salts (GUMBOS) were investigated for several biomedical applications including chemotherapy, photothermal therapy (PTT), and drug delivery. GUMBOS are solid-phase organic salts consisting of bulky cations and anions. Similar to ionic liquids, GUMBOS display highly tunable properties with counter-ions variation, but with a defined melting point range of 25–250 °C. Nanomaterials derived from GUMBOS, i.e. nanoGUMBOS, display enhanced properties at the nanoscale level. This dissertation focuses on development of near infrared IR780 nanoGUMBOS for …

Feasibility Of Generating Synthetic Ct From T1-Weighted Mri Using A Linear Mixed-Effects Regression Model, Anant Pandey, S. A. Yoganathan, Beibei Guo, Rui Zhang

Faculty Publications

Generation of synthetic computed tomography (sCT) for magnetic resonance imaging (MRI)-only radiotherapy is emerging as a promising direction because it can eliminate the registration error and simplify clinical workflow. The goal of this study was to generate accurate sCT from standard T1-weighted MRI for brain patients. CT and MRI data of twelve patients with brain tumors were retrospectively collected. Linear mixed-effects regression models were fitted between CT and T1-weighted MRI intensities for different segments in the brain. The whole brain sCTs were generated by combining predicted segments together. Mean absolute error (MAE) between real CTs and sCTs across all patients …

The Role Of Atp-Sensitive Inward Rectifier Potassium Channels In The Regulation Of Reactive Oxygen Species In The Western Honey Bee, Apis Mellifera L., Christopher J. Fellows

LSU Master's Theses

Colonies of managed honey bees are annually being lost at an unsustainable rate, partly due to reduced immunocompetence that leads to acute viral outbreaks and mortality. To aid in restoring honey bee health despite the myriad of environmental stressors, this thesis focuses on identifying novel physiological pathways that can mitigate virus-mediated mortality through increased immune function. Previous work has demonstrated that a family of potassium ion channels, termed K_ATP channels, mediate the survival of honey bees during infection from a model virus, suggesting K_ATP channels may drive antiviral immunity. Interestingly, these channels have been linked to the regulation …

An Examination Of The Effects Of Post-Identification Feedback On Jurors, Daniella Cash

LSU Doctoral Dissertations

Post-identification feedback (PIF) occurs when witnesses are given feedback following their identification choices. This feedback has been shown to alter witnesses’ retrospective judgments regarding their witnessing experience (e.g., they are more confident that they made a correct identification). PIF effects are robust; they impact witnesses’ memory of their experience, and also appear to act as confirmation to jurors who are asked to assess witness reliability. A current recommendation for eyewitness procedures is that identifications should be recorded and shown to jurors at trial, but this might be harmful if jurors are also negatively impacted by this suggestive feedback. The goal …

Empathic Responsivity And Callous-Unemotional Traits Across Development, Julia Elizabeth Clark

LSU Doctoral Dissertations

Callous-unemotional (CU) traits are associated with deficits in empathy and emotional responses to others. Specifically, CU traits are consistently correlated with under-reactivity to others’ distress cues. However, it is unknown whether CU traits are also associated with more general deficits in emotional reactivity (e.g., to situations involving threat to the self). Further, the relationship between CU traits and the ability to accurately identify others’ emotions is not well established, and prior work often has not considered possible developmental changes in this relationship. To address these questions, the current study recruited a school-based community sample of children from kindergarten, third, and …

High Protein Rice Flour In The Development Of Gluten-Free Muffins And Bread, Gabriella M. Paz

LSU Master's Theses

Gluten sensitivities and intolerance disorders such as Celiac disease are being diagnosed more every day which has opened a huge market for gluten-free foods that is expected to reach nearly $7.6 billion by 2020. About 30% of the US population says they are trying to cut-down on or avoid gluten completely, with only 7% doing so for medical reasons. Although there are gluten-free alternatives available to use in cooking and baking, simple substitution of these flours for wheat does not produce acceptable texture characteristics. Gluten-free baked goods suffer from being low in nutritional value such as protein and fiber content …

Improving Power Network Resilience Against Threats, Hamzeh Davarikia

LSU Doctoral Dissertations

The work reported in this dissertation aims at developing a practical tool for utility transmission planners to improve the power network resilience against high-impact, low-frequency events (HILF). Such events rarely happen, but when occurred are catastrophic. In this dissertation, we studied the impact of HILF from the static and dynamic point of view and proposed the planning strategy to lower the devastating effect of the HILF.

In the static analysis, we consider the steady-state situation of the power grids and plan to protect the grid’s components, i.e., generators, buses, and transmission lines, to maximize preserving demand in a disastrous situation. …

The Application Of Nonverbal Prosody In Scratches, An Original Composition For Trumpet And Chamber Ensemble, Shane Courville

LSU Doctoral Dissertations

This project uses research in prosody (the patterns of stress and intonation in language) to inform the compositional process of an original piece of music for trumpet, piano, string quartet, and sign language entitled Scratches. In this this paper, I propose that both verbal and nonverbal prosody affects music across all cultures at both the subtle and overt levels consciousness. It shows up in chanting and rhythmic structures of folk music as well as composers who use the influence of language explicitly. In conjunction with this document, I will discuss and perform the piece I compose through the inspiration of …

Fluorescence Hplc Analysis Of The In-Vivo Activity Of Glucosylceramide Synthase, Kartik R. Roy, Sachin K. Khiste, Zhijun Liu, Yong Yu Liu

Faculty Publications

Almost all functions of cells or organs rely on the activities of cellular enzymes. Indeed, the in-vivo activities that directly represent the cellular effects of enzymes in live organs are critical importance to appreciate the roles enzymes play in modulating physiological or pathological processes, although assessments of such in-vivo enzyme activity are more difficult than typical test-tube assays. Recently, we, for the first time, developed a direct and easy-handling method for HPLC analyzing the in-vivo activity of glucosylceramide synthase (GCS). GCS that converts ceramide into glucosylceramide is a limiting-enzyme in the syntheses of glycosphingolipids and is one cause of cancer …

Norm Estimates For K-Plane Transforms And Geometric Inequalities, B. Rubin

Faculty Publications

The article is devoted to remarkable interrelation between the norm estimates for k-plane transforms in weighted and unweighted L ^p spaces and geometric integral inequalities for cross-sections of measurable sets in R ⁿ . A similar interrelation is studied for more general j-plane to k-plane transforms on affine Grassmannians and their compact modifications. The article contains a series of new integral-geometric inequalities with sharp constants, explicit equalities, conjectures, and open problems.

Aging In The Workplace: A Cross Case Analysis In Jamaica's Finance Sector, Malaika Tahirah Edwards

LSU Doctoral Dissertations

Along with the increase in the number of older people globally, is an increase in the number of older people in the labor force. Older adults increasingly represent a large segment of the working population. The purpose of this study was therefore to explore workplace aging, with specific reference to Jamaica’s finance sector, in relation to organizational preparedness for the aging workforce.

This study examined aging from an organizational perspective, a national perspective, and an individual perspective, through the lens of Baby Boomers. The study was framed through the lens of the Four Frames Model, and the Metaperspectives Theory, which …

Design Of Metamaterials For Optics, Abiti Adili

LSU Doctoral Dissertations

First part of this dissertation studies the problem of designing metamaterial crystals with double negative effective properties for applications in optics by investigating the conditions necessary for generating novel dispersion properties in a metamaterial crystal with subwavelength microstructure. This provides novel optical properties created through local resonances tied to the geometry of the media in subwavelength regime.

In the second part, this dissertation studies the representation formula used to describe band structures in photonic crystals with plasmonic inclusions. By using layer potential techniques, a magnetic dipole operator describing the tangential component of the electrical field generated by magnetic distribution is …

Cogongrass (Imperata Cylindrica (L.) Beauv.) In Louisiana: Cause And Consequence, Lorissa A. Radunzel-Davis

LSU Master's Theses

Cogongrass (Imperata cylindrica (L.) Beauv.), an invasive species from East Asia, is found worldwide and is problematic in several countries. In the United States, it grows primarily in the Southeast, reducing biodiversity by growing in dense patches and potentially causing mortality and reducing value of native and planted pinelands due to a high burning temperature. Using Lee Memorial Forest, a Louisiana State University AgCenter property in Washington Parish as a study site, this thesis explores cogongrass in Louisiana with emphasis on soil microbes and soil legacy effects on native plant species. Cogongrass populations at Lee Memorial Forest were more …

Chronic Nucleoside Reverse Transcriptase Inhibitors Disrupt Mitochondrial Homeostasis And Promote Premature Endothelial Senescence, Yi-Fan Chen

LSU Doctoral Dissertations

Combination antiretroviral therapy (cART) has been hugely successful in reducing the mortality associated with human immunodeficiency virus (HIV) infection, resulting in a growing population of people living with HIV (PLWH). Since PLWH now have a longer life expectancy, chronic comorbidities have become the focus of the clinical management of HIV. For example, cardiovascular complications are now one of the most prevalent causes of death in PLWH. Nucleoside reverse transcriptase inhibitors (NRTIs) are the backbone of cART, and two NRTIs are typically used in combination with one drug from another drug class, such as a non-NRTI, a protease inhibitor or an …

Divergent Transcriptional Regulation Of Suppressors Of Cytokine Signaling Genes In Adipocytes, Paula Mota De Sa

LSU Doctoral Dissertations

The Janus Kinase - Signal Transducer and Activator of Transcription (JAK-STAT) signaling pathway transduces several signals crucial for development and homeostasis. Suppressors of cytokine signaling (SOCS) proteins control JAK-STAT signaling via a negative feedback loop. The transcription factor STAT5 is known to play a significant role in fat cell development and function, and several studies suggest that acetylation may affect STAT5 transcriptional activity. To test this hypothesis, we treated 3T3-L1 adipocytes with growth hormone (GH) to activate STAT5 in the presence or absence of histone deacetylase (HDAC) inhibitors. STAT5 acetylation levels were low in adipocytes and mostly unchanged by the …

In Vitro Evaluation Of Ovarian Cancer Tumorigenesis As A Function Of Quinone Oxidoreducatse-1 And Cell Phenotype, Milcah S. Jackson

LSU Doctoral Dissertations

In vitro multicellular spheroids are attractive model systems for assessing genetic and epigenetic changes that occur in diseased tissues. Understanding how such alterations in gene and subsequent protein expression affect disease progression and metastasis, drug resistance, and recurrence is of great interest in cancer research. In this regard, examining expression and activity of proteins, such as those with cytoprotective ability that are overexpressed in cancer cells, in addition to cell phenotype (i.e., stem-like, epithelial, mesenchymal, or mixed), are two ways to evaluate genetic and epigenetic changes. Moreover, determining the impact that cytoprotective proteins and cell phenotype have on tumor formation …

Intimate Fictions: The Rhetorical Strategies Of Obscene Violence In Four Novels, Steven Monk

LSU Doctoral Dissertations

Richard Wright, Marlon James, Cormac McCarthy and Ken Levine are each celebrated in their respective fields but notorious for their obscene depictions of violence. Contrary to trauma theorists’ claims that violence shatters language and cannot be spoken, these writers speak violence in its most disturbing forms: torn eyeballs, dead infants, forced fecal consumption and mechanized rape. I argue that obscene violence, much like obscene language, creates a space of intimacy in which transgressive, subversive and oppositional thoughts may be spoken. By alienating their texts from the larger reading public, these writers entice a smaller group of sympathetic readers to develop …

Decadal Changes Of Soil Physiochemical Properties In A Freshwater Wetland After Hydrologic Reconnection, Alina Spera

LSU Master's Theses

Sediment, nutrient deprivation and salt water intrusion, among other factors, are driving widespread organic soil collapse and marsh loss in the Mississippi River Delta. Freshwater diversions were designed to reintroduce Mississippi River water and dissolved nutrients into the adjacent basins to manage salinity and slow land loss by maintaining marsh vegetation and nutrient cycling functions. These diversions are controversial by a few, suggesting that nutrient enrichment without a sediment subsidy can lead to further wetland loss in the receiving basins. In this study, a soil characterization is presented for the receiving marsh of the Davis Pond diversion in 2007, just …

Spatiotemporal Impact Of Snow On Underwater Photosynthetically Active Radiation In Taylor Valley, East Antarctica, Madeline E. Myers

LSU Master's Theses

The role of snow on underwater photosynthetically active radiation (UW PAR) in the McMurdo Dry Valleys (MDVs) has been understudied due to lack of a detailed snowfall record. Research has shown that a relationship between snow cover and UW PAR exists, but the extent has never been evaluated in great detail. Although annual snowfall values in the MDVs are low (3 to 50 mm water equivalent annually), trends of increasing snowfall on the continent under future warming conditions could lead to an increased role for snow in regulating UW PAR (and associated primary productivity). Here, I discuss evidence from the …

Determination Of Molecular Contributions To The Nonlinear Refractive Index Of Air For Mid-Infrared Femtosecond Laser-Pulse Excitation, D. Langevin, J. M. Brown, M. B. Gaarde, A. Couairon

Faculty Publications

Numerical simulations of the rotational contribution of oxygen and nitrogen molecules to the Kerr refractive index change in air are performed for ultrashort laser pulses in the near- and mid-infrared wavelength region. The calculated molecular response is parametrized by means of a damped harmonic oscillator model that is easily tractable in numerical simulations of long-distance propagation of ultrashort laser pulses. Our simulations show that pulses from available mid-infrared laser systems are long enough to be dramatically affected by the molecular response of air during propagation.

Populations Are Not Declining And Food Webs Are Not Collapsing At The Luquillo Experimental Forest, M. R. Willig, L. Woolbright, S. J. Presley, T. D. Schowalter, R. B. Waide, T. Heartsill Scalley, J. K. Zimmerman, G. González, A. E. Lugo

Faculty Publications

No abstract provided.

Measurement Of Neutron Production In Atmospheric Neutrino Interactions At The Sudbury Neutrino Observatory, B. Aharmim, S. N. Ahmed, A. E. Anthony, N. Barros, E. W. Beier, A. Bellerive, B. Beltran, M. Bergevin, S. D. Biller, R. Bonventre, K. Boudjemline, M. G. Boulay, B. Cai, E. J. Callaghan, J. Caravaca, Y. D. Chan, D. Chauhan, M. Chen, B. T. Cleveland, G. A. Cox, X. Dai, H. Deng, F. B. Descamps, J. A. Detwiler, P. J. Doe, G. Doucas, P. L. Drouin, M. Dunford, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani

Faculty Publications

Neutron production in giga electron volt-scale neutrino interactions is a poorly studied process. We have measured the neutron multiplicities in atmospheric neutrino interactions in the Sudbury Neutrino Observatory experiment and compared them to the prediction of a Monte Carlo simulation using genie and a minimally modified version of geant4. We analyzed 837 days of exposure corresponding to Phase I, using pure heavy water, and Phase II, using a mixture of Cl in heavy water. Neutrons produced in atmospheric neutrino interactions were identified with an efficiency of 15.3% and 44.3%, for Phases I and II respectively. The neutron production is measured …

Matrix Recharge In A Shrink-Swell Floodplain Forest Soil, Savannah R. Morales

LSU Master's Theses

Despite the global distribution of fine-grained Vertisols, the hydrology of these floodplain soils is still not well understood. Vertisols shrink and swell depending on soil moisture leading to a range of soil pore sizes, from large macropore cracks to smaller micropores, and consequently a range of hydraulic conductivities. Despite the plethora of research indicating the importance of both flooding and soil moisture in floodplain ecosystems, the specific role that flooding plays in soil moisture recharge has been less widely studied and remains of interest. Blue food dye and deuterated water were used as tracers to determine the role of the …

Dehn Functions Of Bestvina-Brady Groups, Yu-Chan Chang

LSU Doctoral Dissertations

In this dissertation, we prove that if the flag complex on a finite simplicial graph is a 2-dimensional triangulated disk, then the Dehn function of the associated Bestvina--Brady group depends on the maximal dimension of the simplices in the interior of the flag complex. We also give some examples where the flag complex on a finite simplicial graph is not 2-dimensional, and we establish a lower bound for the Dehn function of the associated Bestvina--Brady group.

Neurostimulator With Waveforms Inspired By Nature For Wearable Electro-Acupuncture, Jose Aquiles Parodi Amaya

LSU Doctoral Dissertations

The work presented here has 3 goals: establish the need for novel neurostimulation waveform solutions through a literature review, develop a neurostimulation pulse generator, and verify the operation of the device for neurostimulation applications.

The literature review discusses the importance of stimulation waveforms on the outcomes of neurostimulation, and proposes new directions for neurostimulation research that would help in improving the reproducibility and comparability between studies.

The pulse generator circuit is then described that generates signals inspired by the shape of excitatory or inhibitory post-synaptic potentials (EPSP, IPSP). The circuit analytical equations are presented, and the effects of the circuit …

Capturing Contingency: Experimental Documentary In The Wake Of Direct Cinema, Dustin Reed Zemel

LSU Doctoral Dissertations

This dissertation examines experimental works in the late 1960s utilizing technologies and techniques connected with direct cinema and cinema vérité models of documentary filming. Focusing on three experimental filmmakers, I show how films by Jonas Mekas, Robert Fulton and William Greaves eschew the austere style associated with observational realism of direct cinema in favor of more ostentatious experimental assembly practices which highlight the role of the filmmaker as artist. I argue for a relational model of assessment in which documentary film’s qualitative renderings of environment become important determinants of documentary integrity and efficacy. With separate chapters focusing on works by …

Chemosensors Based On Higher Energy Gap Control Of Fluorescence In Conjugated Polymers, Chun-Han Wang

LSU Doctoral Dissertations

Conjugated polymers (CPs) have been widely investigated for their remarkably high sensitivity towards various chemical detection applications. CPs can exhibit effective transduction of certain analyte binding events through changes in fluorescence. These changes include amplified fluorescence quenching ("turn-offmechanism") or an appearance of a fluorescent emission ("turn-onmechanism"). Whereas turn-offsensors can be readily designed and are widely used, amplifying turn-onsensors, from a practical standpoint, are more convenient to use but are more challenging to design.

This dissertation primarily focuses on the development and study of conjugated polymer based amplifying turn-onfluorescence chemosensors utilizing the novel “higher …