Digital Commons Network^™

Spatiotemporal Variation Of Benthic Silica Fluxes In The Ngom Shelf, Byron Ebner

LSU Master's Theses

Dissolved silica (DSi), plays an important role in regulating primary productivity of silicifying organisms, such as diatoms which precipitate hard parts composed of biogenic silica (bSi) in coastal and shelf ecosystems fed by major rivers. In the Northern Gulf of Mexico (NGOM), loading of nitrogen and phosphorous have increased compared to a decline in DSi in the Mississippi River. Continued decreasing in DSi loading could lead to limited diatom growth and production or shifts in community composition, therefore, it is important understand the role of benthic fluxes in providing silica to the overlying water column as there are few regional …

Distributed Wireless Algorithms For Rfid Systems: Grouping Proofs And Cardinality Estimation, Vanya D. Cherneva

LSU Doctoral Dissertations

The breadth and depth of the use of Radio Frequency Identification (RFID) are becoming more substantial. RFID is a technology useful for identifying unique items through radio waves. We design algorithms on RFID-based systems for the Grouping Proof and Cardinality Estimation problems.

A grouping-proof protocol is evidence that a reader simultaneously scanned the RFID tags in a group. In many practical scenarios, grouping-proofs greatly expand the potential of RFID-based systems such as supply chain applications, simultaneous scanning of multiple forms of IDs in banks or airports, and government paperwork. The design of RFID grouping-proofs that provide optimal security, privacy, and …

Acquiring Native-Like Norms Of Making A Request In Spanish During Short-Term Study Abroad In Argentina And Spain, Christine H. Song

LSU Master's Theses

The current study examines if L2 learners of Spanish acquire native-like norms of making a request during short-term study abroad in Argentina and Spain via Discourse Completion Tasks (DCT). The investigation included 3 groups of the participants: an experimental group of 15 U.S. students who studied in Argentina or Spain; a control group of 12 U.S. students who had not studied abroad; and a control group of 7 native speakers of Spanish. The results show that students in the study abroad group became more native-like in making a request to a certain extent. Firstly, the students in the experimental group …

Relationship Between Subject Pronoun And Verb Finite Marking In Aae-Speaking Children, Emily C. Sossaman

LSU Master's Theses

Children learning General American English (GAE) show a relationship between their case marking of subject pronouns and their marking of finite verbs, and this relationship has been found for children with specific language impairment (SLI) and typically developing controls (TD). The relationship between children’s case marking of subject pronouns and finite verb marking has not been examined in children who speak dialects of English that differ from GAE. The purpose of the current study was to examine this relationship in children learning African American English (AAE) as this dialect differs from GAE. The data came from an archival dataset of …

Use Of Video-Models To Teach Language Stimulation Techniques, Jason Killian

LSU Master's Theses

The current study was designed to assess the feasibility of creating videos depicting Enhanced Milieu Teaching (EMT) support strategies and presenting them to graduate students in a communication sciences and disorders program, and whether differences in accuracy existed between first- and second-year graduate students. EMT support strategies were chosen due to the previous successes found within the literature. Twelve videos were presented to ten graduate students. Each participant response was analyzed for accuracy and overall responses were compiled to create overall video clarity.

Results showed that the Communication Temptation EMT support strategy videos achieved the highest levels of clarity, while …

Effects Of Oil And Gas Development On Waterfowl Nesting Ecology In The Bakken Formation Of North Dakota, Cassandra G. Skaggs

LSU Master's Theses

The Prairie Pothole Region (PPR) is one of the most important areas on the continent for grassland-nesting birds. Thirty percent of the PPR overlaps the Bakken shale formation where rapidly accelerating oil and gas development has the potential to impact millions of breeding waterfowl. While oil and gas development has negatively affected other ground-nesting birds such as sagebrush passerines and Greater Sage-Grouse (Centrocercus urophasianus) in Wyoming, the potential impact on breeding waterfowl in the PPR is unknown. In addition, the PPR landscape is already heavily fragmented by agriculture, and increasing land conversion and disturbance from petroleum extraction may further …

The Generalization Of Fear Condition Between Viewed And Imagined Percepts, Lauryn Michelle Burleigh

LSU Master's Theses

Mental images can provoke intense emotional states (Holmes & Matthews, 2010). Imagery and perception have common neural and physiological mechanisms, including activation of the early visual areas (Albers et al., 2013). We tested the prediction that individuals can acquire fear to imagined percepts and if this fear transfers to viewing percepts, using fMRI and self-reported measures to determine participants’ fear. The participants completed a task in which they viewed and imagined two stimuli, and were fear conditioned when imagining the CS+. Participants are only told that mild electrical stimulation will be paired with one of the stimuli, but not which …

Assessment And Correction Of Lidar-Derived Dems In The Coastal Marshes Of Louisiana, William M. Lauve

LSU Master's Theses

The onset of airborne light detection and ranging (lidar) has resulted in expansive, precise digital elevation models (DEMs). DEMs are essential for modeling complex systems, such as the coastal land margin of Louisiana. They are used for many applications (e.g. tide, storm surge, and ecological modeling) and by diverse groups (e.g. state and federal agencies, NGOs, and academia). However, in a marsh environment, it is difficult for airborne lidar to produce accurate bare-earth measurements and even accurate elevations are rarely verified by ground truth data. The accuracy of lidar in marshes is limited by the sensor’s resolution …

New Γ -Ray Transitions Observed In Ne 19 With Implications For The O 15 (Α,Γ) Ne 19 Reaction Rate, M. R. Hall, D. W. Bardayan, T. Baugher, A. Lepailleur, S. D. Pain, A. Ratkiewicz, S. Ahn, J. M. Allen, J. T. Anderson, A. D. Ayangeakaa, J. C. Blackmon, S. Burcher, M. P. Carpenter, S. M. Cha, K. Y. Chae, K. A. Chipps, J. A. Cizewski, M. Febbraro, O. Hall, J. Hu, C. L. Jiang, K. L. Jones, E. J. Lee, P. D. O'Malley, S. Ota, B. C. Rasco, D. Santiago-Gonzalez, D. Seweryniak, H. Sims, K. Smith, W. P. Tan, P. Thompson, C. Thornsberry

Faculty Publications

The O15(α,γ)Ne19 reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in Ne19 is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ-γ coincidences from the F19(He3,tγ)Ne19 reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from …

Factors Related To Parental Stress At Early Diagnostic Assessments For Autism Spectrum Disorder, Abigail Issarraras

LSU Master's Theses

Autism Spectrum Disorder (ASD) is marked by pervasive impairments in social communication and restricted, repetitive interests, behaviors, and activities. Parents raising a child with ASD have consistently reported higher levels of parenting stress compared to parents of typically developing children and children with other disabilities. Several different factors influence parental stress levels at different stages of their child’s life, and so an understanding of the most predictive factors of parental stress at initial ASD assessments is critical to best serving the needs of families with a new diagnosis. The current study investigated several factors that may impact parenting stress at …

Modeling Of Fluid Injection For Hydraulic Fracturing Initiation In Porous Rock Formations, Krishna Adhikari

LSU Master's Theses

Hydraulic fracturing has been widely opted in recent times to simulate the unconventional reservoirs and thus, has become key a subject of interest in petroleum engineering. The stress concentration around the borehole affects the breakdown pressure and fracture reopening pressure during the hydraulic fracturing treatments. Thus, the state of stress around borehole wall and its surrounding rocks due to instantaneous drilling and a fluid injection at borehole surface needs to be determined accurately to initiate the hydraulic fractures. This research intends to derive the analytical stress solution of inclined borehole subjected to time-dependent fluid injection and in-situ stress, verify the …

Source Effects Of Health Information And Digital Health Literacy Among College Students: An Elaboration Likelihood Model Perspective, Julia Morton

LSU Master's Theses

While advertising and persuasion is a widely researched area in mass communication, the impact of health marketing on consumer behavior remains a relatively new arena. The complex health information landscape online is comprised of both public health organizations seeking to improve health behaviors as well as businesses seeking to sell their products or services. It is well documented in the communication literature that the source of information can impact the recipient in a multitude of ways. Digital health literacy is undoubtedly an essential skill for anyone interacting with health information online, spurring the question, do individuals with low and high …

Aristotle's Quarrel With Socrates: Friendship In Political Thought, John Boersma

LSU Doctoral Dissertations

Friendship played an outsized role in ancient political thought in comparison to medieval and modern political philosophies. Most modern scholarship has paid relatively little attention to the role of friendship in ancient political philosophy. Recently, however, scholars are increasingly beginning to investigate classical conceptions of friendship. My dissertation joins this growing interest by examining the importance of friendship in the political thought of Socrates and Aristotle. Specifically, I analyze the divergent approaches that Socrates and Aristotle take to politics and trace these distinct approaches to their differing conceptions of friendship. Through an examination of two Platonic dialogues—the Lysis and the …

Self-Healing Composite Of Thermoset Polymer And Programmed Super Contraction Fibers, Guoqiang Li, Harper Meng

College of Engineering Patents

A composition comprising thermoset polymer, shape memory polymer to facilitate macro scale damage closure, and means for molecular scale healing has the ability to repair structural defects by a bio-mimetic, close-then-heal process. The shape memory polymer serves to bring surfaces of a structural defect into proximity, after which the healing means moves into the defect and provides molecular scale healing. The means for molecular scale healing can be a thermoplastic, such as fibers, particles or spheres, which are heated to or above the thermoplastic's melting point, and then the composition is cooled below that melting temperature. The compositions can not …

Mosquito Image Classification Using Convolutional Neural Networks, Sumanth Vissamsetty

LSU Master's Theses

Human life has always been affected by insects, especially mosquitoes, since it's early beginnings. This pesky insect acts as a vector that transmit pathogens through feeding on our blood, spreading life-threatening diseases like Zika Virus, Malaria, Dengue fever, Chikungunya and more. It is important to prevent these mosquitoes from harming humans and one way to do so is to control the mosquito population, or mosquito abatement as it is commonly known. It is important to note that not all mosquitoes are the same and each of them live, reproduce and attack in their own unique way. Hence it is crucial …

Pragmatics And Pedagogy In University Level Spanish Second Language Textbooks, Vanessa M. Cardenas

LSU Master's Theses

This pragmatic and pedagogical investigation analyzes six university level Spanish second language textbooks (L2Ts) used in the classroom setting. The materials used in this investigation include three beginning level textbooks Dicho y Hecho (2012), Experience Spanish (2012), and Puntos de Partida (2012), and three intermediate level textbooks ¡Avance! (2008), Conexiones (2010), and Interacciones (2013). The purpose of this investigation is to closely examine if the L2Ts communicatively present the speech acts of requesting, refusing, and apologizing, and address forms, with sufficient pragmatic context for the L2 learner to acquire native-like production. The results have shown that the speech acts under …

American Waste, Jason Allen Christian

LSU Master's Theses

American Waste is an interlinking story cycle told in the first person by a character called Rice. The stories follow Rice from his childhood (in rural Oklahoma) into adulthood, first when lives in a “punk house” with other young punk rockers in Oklahoma City, and later as he travels by freight train around the country. While he travels he reports on what he sees and experiences in the subculture that he is part of, whose members are called gutter punks and crusties. Theirs is a lifestyle bent on risk and adventure and also often plagued with drug and alcohol addiction. …

Investigating The Effects Of Cognitive Diversity On The Small Gasoline Engines Problem Solving Ability Of Undergraduate Students Enrolled In A Team-Based Learning Formatted Agricultural Mechanics Course, Whitney L. Figland

LSU Master's Theses

Perhaps the most challenging factor in teaching is being able to foster a learning environment that meets the needs of all learners, which is often achieved by utilizing a plethora of instructional methods that develop critical thinking and problem solving skills. These 21st century skills have been recurrently identified as a critical component of today’s workplace and employers are hiring individuals who can solve complex problems, especially within agriculture. However, students in todays educational classrooms are often not receiving the hands-on instruction that is needed in order to foster the development of critical thinking and problem solving skills. Further, problem …

Parents’ Perspectives Of Cultural Competence In Schools: The Initial Development Of The Culturally Competent School Community Scale, Aijah Kai Baruti Goodwin

LSU Master's Theses

Diversity in school settings is continuously changing with an increase of minority students in the United States school systems. The present study uses a phenomenological approach to gain parents’ experiences related to culturally responsive and competent practices in their child(ren)’s schools. Interviews were conducted with 10 culturally diverse parents with children in preschool and/or elementary school. The interviews were transcribed verbatim, coded for common themes and analyzed for the frequency and prevalence of the themes in preschool vs. elementary school settings. An analysis of the interviews revealed 6 themes related to culturally competent and responsive practices in school settings. The …

A State Of Impermanence: Buddhism, Liberalism, And The Problem Of Politics, Cory Michael Sukala

LSU Doctoral Dissertations

This dissertation explores the relationship of Buddhist political thought and liberal political thought at the level of first principles. I will examine the tension created by the Buddhist view of political life as instrumental and secondary to man's being as a function of the transition of the Buddhist world into the sphere of Western political life, which views the role of politics as primary to man's nature. In Part I, this will be accomplished through a consideration of the origins of political life and the foundation of the political state in each tradition as viewed through the themes of human …

Twitter Use In Hurricane Isaac And Its Implications To Disaster Resilience, Kejin Wang

LSU Master's Theses

Disaster Resilience is the capacity of a community to ‘bounce back’ from disastrous events. Most studies rely on traditional data such as census data to study community resilience. With the advent of social media era, the new data source gives us an opportunity to explore the application of Twitter data to better understand disaster resilience. A research question is: does Twitter use correlate with disaster resilience? In other words, will communities with more Twitter users be more resilient to disasters, presumably because they are more likely to be better informed? The underlying issue is that if there are social and …

Chemical Durability And Dissolution Kinetics Of Iodoapatite In Aqueous Solutions, Zelong Zhang, William L. Ebert, Tiankai Yao, Jie Lian, Kalliat T. Valsaraj, Jianwei Wang

Faculty Publications

© 2019 American Chemical Society. Understanding the long-term release of radionuclides from nuclear waste to the environment is critical for public acceptance and sustainability of nuclear energy. Iodoapatite, a synthetic material similar to mineral vanadinite proposed for radioactive iodine-129 immobilization, is employed in this study as a model system for iodine waste forms and ceramic waste forms in general to understand its long-term chemical durability. Semidynamic leaching experiments were performed in cap-sealed Teflon vessels to evaluate the chemical durability at temperatures from 20 to 90 °C and pH values from 4 to 9 using deionized water and pH buffer solutions. …

Fermi Surface, Possible Unconventional Fermions, And Unusually Robust Resistive Critical Fields In The Chiral-Structured Superconductor Aube, Drew J. Rebar, Serena M. Birnbaum, John Singleton, Mojammel Khan, J. C. Ball, P. W. Adams, Julia Y. Chan, D. P. Young, Dana A. Browne, J. F. Ditusa

Faculty Publications

The noncentrosymmetric superconductor (NCS) AuBe is investigated using a variety of thermodynamic and resistive probes in magnetic fields of up to 65 T and temperatures down to 0.3 K. Despite the polycrystalline nature of the samples, the observation of a complex series of de Haas-van Alphen (dHvA) oscillations has allowed the calculated band structure for AuBe to be validated. This permits a variety of BCS parameters describing the superconductivity to be estimated, despite the complexity of the measured Fermi surface. In addition, AuBe displays a nonstandard field dependence of the phase of dHvA oscillations associated with a band thought to …

Fermi Surface, Possible Unconventional Fermions, And Unusually Robust Resistive Critical Fields In The Chiral-Structured Superconductor Aube, Drew J. Rebar, Serena M. Birnbaum, John Singleton, Mojammel Khan, J. C. Ball, P. W. Adams, Julia Y. Chan, D. P. Young, Dana A. Browne, J. F. Ditusa

Faculty Publications

The noncentrosymmetric superconductor (NCS) AuBe is investigated using a variety of thermodynamic and resistive probes in magnetic fields of up to 65 T and temperatures down to 0.3 K. Despite the polycrystalline nature of the samples, the observation of a complex series of de Haas-van Alphen (dHvA) oscillations has allowed the calculated band structure for AuBe to be validated. This permits a variety of BCS parameters describing the superconductivity to be estimated, despite the complexity of the measured Fermi surface. In addition, AuBe displays a nonstandard field dependence of the phase of dHvA oscillations associated with a band thought to …

Naus, Justin Greene

LSU Master's Theses

A collection of poems and nonfiction vignettes, naus entails a navigation of my experience with Tourette Syndrome and, consequently, what it can mean to have a noisy body. Rather than situate noise as a negatively construed iteration of sound, I contend that, following the work of Michel Serres, it is instead a disruption within a system, a parasitical interception, an affective force that has the potential to alter the positions and orientations of a given constellation of bodies, human or otherwise. Similar to how sound, as a verb, can be understood as “to fathom” or “to make sense of,” naus …

Quantifying Coherence In A Transdiagnostic Sample: A Methodological Investigation Of Computationally-Derived Coherence Using Ambulatory Assessment, Taylor L. Fedechko

LSU Master's Theses

Schizophrenia is a clinical diagnosis assigned to individuals that experience positive (e.g., hallucinations and delusions), negative (e.g., blunted affect), and disorganized (e.g., incoherent speech) symptoms. One particularly disabling symptom is incoherence, which is defined as the meaning-based relationship between ideas. This symptom can drastically affect an individual’s quality of life by affecting areas such as social and occupational functioning. Currently, the mechanism behind this symptom is unknown and requires further study. One way to examine incoherence is to understand its level of expression in other clinical populations. With the advent of computationally-derived natural language processing (NLP), coherence can be quantified …

Estimating Sex Using The Human Mandibular Canine, Brittney Blevins

LSU Master's Theses

Sexual dimorphism can be quantified in human mandibular canines; therefore, these teeth can be used to estimate sex of skeletonized individuals. This study complements and expands previous research by comparing mesiodistal diameter (MD), buccolingual diameter (BL), and crown area of human mandibular canines. Measurements were taken from a sample of skeletal individuals from the Terry Collection (n=677), the Maxwell Museum of Anthropology Skeletal Collection (n=86), and a random sample of dental casts from the James K. Economides Orthodontic Case File (JKE, n=624), for a total study sample of 741 males and 677 females. Both left and right canines were measured, …

The Lowly Ones, Cassie Meredith Benson Grillon

LSU Master's Theses

The Lowly Ones is a collection of short stories that interrogates the meaning of beatitudes written about in Luke 6:20–23 in the Bible. The characters in these stories navigate complex moral situations that examine the meaning behind the values presented in the beatitudes: mercy, sorrow, persecution, etc. These women face the challenges of faith in surprising ways, through the notoriety of a dead sister, the fascination with a lower-class neighbor, and the mysterious purchase of an exotic bird. This collection thoroughly erases the fictitious line religion and society draw between saints and sinners.

Modeling Crowd Feedback In The Mobile App Market, Grant S. Williams

LSU Doctoral Dissertations

Mobile application (app) stores, such as Google Play and the Apple App Store, have recently emerged as a new model of online distribution platform. These stores have expanded in size in the past five years to host millions of apps, offering end-users of mobile software virtually unlimited options to choose from. In such a competitive market, no app is too big to fail. In fact, recent evidence has shown that most apps lose their users within the first 90 days after initial release. Therefore, app developers have to remain up-to-date with their end-users’ needs in order to survive. Staying close …

Flood Resilience Assessment Of New Orleans After Hurricane Katrina Based On Thermal And Vegetation Index Image Time Series, Yirui Deng

LSU Master's Theses

Resilience is a concept with increasing importance in modern risk management because of its role in reducing risks of unpreventable disasters. Previous resilience assessment studies often require extensive surveys of various social, economic, and psychological data or incorporate remote sensing data as one of the complicated physical and social parameters for assessment models. Limited data accessibility to such data due to funding, time, and labor intensity is a major challenge for their wider applications. Therefore, this study proposes the hypothesis that the overall resilience of an urban area to disturbances of natural disasters can be reflected through the time series …