Digital Commons Network^™

Verb Diversities Of Children With And Without Developmental Language Disorder: A Study Of Language Samples, Caitlyn J. Kearns

LSU Master's Theses

Background: There have been numerous studies that have researched word learning in children with Developmental Language Disorder (DLD). These studies have found that children with DLD present with higher vocabulary deficits compared to their typically developing (TD) peers. Many of these studies’ results suggest that verb learning is the most difficult word type to comprehend in early language development for both TD children and children with DLD. This current study aims to examine verb use in children with and without DLD and to specifically examine their usage of GAP verbs. Methods: Participants included 36 children, 18 TD and 18 DLD …

The Risks Posed By Mosquito Ultra-Low Volume Applications To Procambarus Clarkii Production, Timothy Mcnamara

LSU Doctoral Dissertations

Mosquito abatement has received much scrutiny due to concerns about the impacts of control applications on non-target organisms. In Louisiana, a great deal of this concern has come from crawfish farmers claiming mosquito abatement applications have damaged crawfish production. To determine which mosquito abatement practices and products pose a risk to crawfish production, we conducted a series of studies examining mosquito abatement practices in the vicinity of crawfish production fields and the impacts of common mosquito abatement product exposure on crawfish health and production. We found that mosquito ULV applications are the most likely to result in exposure to crawfish …

Physical To Cyber: A Case Study Of The Print And Digital Literacy Of Burgeoning Older Adult Learners, Laura Elizabeth Williams

LSU Doctoral Dissertations

This intrinsic single case study explored the ways in which two older adult burgeoning literacy learners in a capital city in the U.S. Gulf South utilized the skills of print literacy and digital literacy both together and apart. This study was an investigation of print and digital literacy, individually and combined, in order to examine the way older adult burgeoning literacy learners used one kind of literacy (print) to develop the other (digital). Using semi-structured interviews, observations, and literacy journals, participants’ perceptions were explored. Findings included that fully literate older adults used their literacy to enact and maintain social connections, …

The Effect Of Word-Learning Biases On Early Vocabulary Acquisition In Young Children On The Autism Spectrum, Claire C. Bourgeois

LSU Master's Theses

Background: Vocabulary composition and word-learning biases are closely interrelated in typical development. Such word-learning biases are influenced by perceptually and conceptually salient word features, including imageability, concreteness, iconicity, and attention to shape. Autistic children often have delayed language acquisition, but there is currently little research examining the underlying mechanisms autistic children use to acquire words. The current study aimed to examine the noun composition of autistic children across a range of vocabulary sizes by examining associations between expressive noun vocabulary size and imageability, iconicity, concreteness and evidence for the shape bias, and to examine whether these patterns differ from their …

Utilization Of A Gravity Model To Determine The Impact Of Covid-19 In Us Bilateral Trade, Dacia Lopez Lopez

LSU Master's Theses

In April 2022, the United States traded with approximately 233 countries. Exports and imports of goods and services represent 11.73% and 14.58% of U.S. GDP respectively. Because of that, U.S. bilateral trade is important. COVID-19 impacted the economy and trade in different ways as supply and demand changes. The objective of this study is to determine the impact of COVID-19 in U.S. bilateral trade using an augmented gravity model and panel data from 20 U.S. partner countries and the United States over 24 quarters, from 2015 to 2021.

To accomplish these objectives, a gravity model was used and Random effects …

A Saturated Map Of Common Genetic Variants Associated With Human Height, Loïc Yengo, Sailaja Vedantam, Eirini Marouli, Julia Sidorenko, Eric Bartell, Saori Sakaue, Marielisa Graff, Anders U. Eliasen, Yunxuan Jiang, Sridharan Raghavan, Jenkai Miao, Joshua D. Arias, Sarah E. Graham, Ronen E. Mukamel, Cassandra N. Spracklen, Xianyong Yin, Shyh Huei Chen, Teresa Ferreira, Heather H. Highland, Yingjie Ji, Tugce Karaderi, Kuang Lin, Kreete Lüll, Deborah E. Malden, Carolina Medina-Gomez, Moara Machado, Amy Moore, Sina Rüeger, Xueling Sim, Scott Vrieze, Tarunveer S. Ahluwalia, Masato Akiyama, Matthew A. Allison

Faculty Publications

Common single-nucleotide polymorphisms (SNPs) are predicted to collectively explain 40–50% of phenotypic variation in human height, but identifying the specific variants and associated regions requires huge sample sizes1. Here, using data from a genome-wide association study of 5.4 million individuals of diverse ancestries, we show that 12,111 independent SNPs that are significantly associated with height account for nearly all of the common SNP-based heritability. These SNPs are clustered within 7,209 non-overlapping genomic segments with a mean size of around 90 kb, covering about 21% of the genome. The density of independent associations varies across the genome and the regions of …

Understanding Motivations Among Sustained Cooperative Extension Partners For Obesity Prevention In Rural Louisiana, Catherine R. Losavio

LSU Master's Theses

Louisiana consistently has one of the highest rates of obesity in the nation with higher concentrations of obesity in many rural parishes (i.e., counties). Due to over a century of visibility and engagement in rural communities, Cooperative Extension (Extension) is uniquely poised to reach remote rural communities disproportionately impacted by obesity. As Extension increases its use of community coalitions and implements its new National Framework for Health Equity and Well-Being, understanding motivations and communication preferences among long-term rural coalition partners for obesity prevention and health promotion has become essential for duplicating successful local-level policy, system, and environmental (PSE) changes. This …

Overcoming Gifted Student Underachievement Through Teacher Best Practices, Samantha Simmons Webre

LSU Doctoral Dissertations

The goal of this study is to collect the best practices being utilized by gifted teachers affecting change amongst their gifted underachieving students. Data collected will explore trends deemed significant among the successful best practices being utilized by academically gifted certified teachers.

The researcher will administer surveys, conduct interviews, and classroom observations to collect data from a sample of participants who are currently employed as academically gifted certified teachers. This study will focus on these academically gifted certified teacher’s definitions and recognition of underachievement, identified causes for underachievement, best practices employed to re-engage underachieving students, as well as perceptions of …

Influence Of Hesperidin On The Physico-Chemical, Microbiological, And Sensory Characteristics Of Frozen Yogurt, Roberto Antonio Cedillos Hernández

LSU Master's Theses

Frozen yogurts contain yogurt culture bacteria which might impart health benefits to its consumers. Global frozen yogurt market sales are expected to grow 4.8% by 2028 which represents an important opportunity for the industry, consumers, and researchers. Polyphenols are metabolites found in plants which have antioxidant and anti-inflammatory properties and might prevent chronical diseases such as cancer, diabetes, and cardiovascular diseases. The objective of this study was to elucidate the effect of the polyphenol hesperidin on the physico-chemical, microbiological, and sensory characteristics of frozen yogurts. Hesperidin was incorporated in frozen yogurt at three concentrations (500, 250 and 125 mg/90g of …

The Degree Gini Index Of Several Classes Of Random Trees And Their Poissonized Counterparts—Evidence For Duality, Carly Domicolo, Panpan Zhang, Hosam Mahmoud

Journal of Stochastic Analysis

No abstract provided.

Experience That Works: An Investigation Uncovering Essential Elements Of Field Experiences And Internships Within Principal Preparation Programs That Significantly Impact And Contribute To Principal Effectiveness, Nathan Wayne Hite

LSU Doctoral Dissertations

This study applied situational leadership and transformational leadership theories to discern essential elements of principal preparation program field experiences and internships that contributed most to principal effectiveness. Identifying critical components of principal preparation field experiences and internships were imperative to ensure principal effectiveness within the ever-changing landscape of education. The objective of this study was to discover essential components of field experiences and internships provided by principal preparation programs that contributed most to principal effectiveness, increasing the likelihood public school districts hired principal candidates who were equipped with the skills necessary to step into the position with minimal on-the-job training. …

A Cluster Structure On The Coordinate Ring Of Partial Flag Varieties, Fayadh Kadhem

LSU Doctoral Dissertations

The main goal of this dissertation is to show that the (multi-homogeneous) coordinate ring of a partial flag variety C[G/P_K^−] contains a cluster algebra for every semisimple complex algebraic group G. We use derivation properties and a canonical lifting map to prove that the cluster algebra structure A of the coordinate ring C[N_K] of a Schubert cell constructed by Goodearl and Yakimov can be lifted, in an explicit way, to a cluster structure \hat{A} living in the coordinate ring of the corresponding partial flag variety. Then we use a minimality condition to prove that the cluster algebra \hat{A} is equal …

Synthesis Of Carbon Nanohoops And Macrocycles Via Alkyne Metathesis, Xin Zhou

LSU Doctoral Dissertations

Cycloparaphenyleneacetylene (CPPA) and cycloparaphenylene (CPP) are called carbon nanohoops; they are fully conjugated macrocycles with radially oriented aromatic groups. Though many syntheses of CPPA and CPP were reported, in the macrocyclization step, the yields were usually not satisfying, as the reactions were irreversible. Our group utilizes alkyne metathesis to address this problem. Chapter 1 provides backgrounds and an introduction to the carbon nanohoops and alkyne metathesis.

Chapter 2 details the synthesis of the [3]CPP⁴A and [3]CPP⁵A, with good macrocyclization yields via alkyne metathesis. This study showed the error-correction ability of alkyne metathesis, especially with nonsymmetric substrates. …

"A Sort Of Pain, Which Is New": Unresolved Grief In British Romantic Literature, Eta Farmacelia Nurulhady

LSU Doctoral Dissertations

This dissertation examines the cultural phenomenon of mourning in relation to British Romantic Literature. In chapters on the work of William Wordsworth, Jane Austen, Felicia Hemans, and Charles Lamb, it argues that the Romantic period, as a time of increased mobility due to three revolutions, wars, and the expansion of empire, was a moment when unresolved grief became a common experience. Using the psychologist Pauline Boss’s concept of “ambiguous loss” as a lens for a new reading of British Romantic writing, and distinguishing this concept from the modern concept of “nostalgia,” this dissertation analyzes poetry, novels, and essays written by …

Simulation Modeling Of A High-Throughput Oyster Cryopreservation Pathway, Sarah Bodenstein, Isabelina Nahmens, Terrence R. Tiersch

Faculty Publications

The genetic resources of oysters in Louisiana and the Gulf of Mexico are threatened due to high unexplained oyster mortality. Germplasm repositories are collections of cryopreserved genetic material stored alongside associated information that are used to protect genetics resources and facilitate breeding programs in agricultural industries. Therefore, there is great need for oyster repositories. Development of repositories has been slow despite research on high-Throughput cryopreservation protocols because of logistical complexities. The goal of this study was to begin to address the gap between cryopreservation research and repository development in oyster aquaculture by modeling a cryopreservation protocol to understand and improve …

Controlling Electro-Magnetic Functionality Of Ruthenates By Heterostructure Design, Zeeshan Ali

LSU Doctoral Dissertations

Perovskite oxides (ABO₃) show wide range of functionalities originating from interplay of structural, spin, charge, and orbital degrees of freedoms. The bulk perovskite structure could be controlled via conventional chemical substitution, though exploiting heterostructure engineering novel ground states could be observed which otherwise are absent in bulk. In this thesis, the interest is to explore the electro-magnetic phenomena as complex oxides are confined in heterostructures.

I first investigate electromagnetic properties of ultrathin epitaxial ruthenate: SrRuO₃ (SRO); spatially confined between SrTiO₃ (STO) i.e., STO⁵-SROⁿ-STO⁵ with n = 1- and 2-unit cells. It …

A Sharp Rate Of Convergence In The Functional Central Limit Theorem With Gaussian Input, S.V. Lototsky

Journal of Stochastic Analysis

No abstract provided.

Effect Of Fine Aggregate And Pva Fiber Content On The Properties Of Metakaolin-Based Engineered Geopolymer Composites, Ruwa Abufarsakh

LSU Master's Theses

The mechanical and physical properties of novel metakaolin (MK) based Engineered Geopolymer Composites (EGCs) consisting of locally available river sand (RS) or manufactured microsilica sand (MS) reinforced with polyvinyl alcohol (PVA) fiber were studied. Plain geopolymer (GP) binder, GP mortars, and fiber-reinforced composites were also studied. Aspects of the material composition that were investigated in this study include binder composition, aggregate type, and PVA fiber content. Per the compressive strength results, GP mortars presented greater compressive strength than GP binder where the GP mortars manufactured with lower water to solids ratio exhibited greater compressive strengths. Furthermore, the incorporation of PVA …

Evaluation Of Noise Regression Techniques In Resting-State Fmri Studies Using Data Of 434 Older Adults, Norman Scheel, Jeffrey N. Keller, Ellen F. Binder, Eric D. Vidoni, Jeffrey M. Burns, Binu P. Thomas, Ann M. Stowe, Linda S. Hynan, Diana R. Kerwin, Wanpen Vongpatanasin, Heidi Rossetti, C. Munro Cullum, Rong Zhang, David C. Zhu

Clinical Research Faculty Publications

Subject motion is a well-known confound in resting-state functional MRI (rs-fMRI) and the analysis of functional connectivity. Consequently, several clean-up strategies have been established to minimize the impact of subject motion. Physiological signals in response to cardiac activity and respiration are also known to alter the apparent rs-fMRI connectivity. Comprehensive comparisons of common noise regression techniques showed that the “Independent Component Analysis based strategy for Automatic Removal of Motion Artifacts” (ICA-AROMA) was a preferred pre-processing technique for teenagers and adults. However, motion and physiological noise characteristics may differ substantially for older adults. Here, we present a comprehensive comparison of noise-regression …

Household Salt Production By The Late Classic Maya: Underwater Excavations At Ta'ab Nuk Na, Heather Mckillop, E. Cory Sills

Faculty Publications

Salt is an essential commodity; archaeological remains around the world attest to the importance of its production, exchange and consumption. Often located in coastal locations, many production sites were submerged by rising seas, including the Paynes Creek Salt Works on the southern Belize coast. Survey and excavation of these sites has identified 'kitchens' for brine boiling, as well as Terminal Classic residential structures at Ek Way Nal. The authors report the discovery of an earlier residential building alongside salt kitchens at the nearby site of Ta'ab Nuk Na. This finding indicates that surplus household production began during the Late Classic, …

Identity Composition: A Qualitative Study Of Community College English Composition And Lgbtq-Inclusive Pedagogical Practices, Lucas Michel Gassen

LSU Doctoral Dissertations

This research investigates the identity-based practices and experiences of English composition instructors who teach at community colleges and assesses the extent to which LGBTQ-inclusive pedagogical approaches are undertaken to meet the needs of sexual and gender minority students. The participant pool was comprised of community college instructors within the Louisiana Community and Technical College System (LCTCS) who have taught English composition courses within the past five years. This study aims to answer the following research questions: 1. In what ways and to what extent is identity-based instructional content incorporated in community college English composition courses? 2. In what ways and …

Case Study Of The Impact Of Teacher Efficacy On Select Pk-3 School Faculty In A South Louisiana School: A Perceptual Investigation, Tara L. Alfred-Pellerin

LSU Doctoral Dissertations

This single case study explored the perceptions, feelings, and ideas of a select group of PK-3 certified teachers in a small, south Louisiana elementary school. As educators, perceptions and opinions often go unrecognized within the central school board and in the district. In order for teachers to be successful, it is imperative they are equipped with professional development and opportunities for collaboration in order to increase their self-efficacy to become more invested. This study focused on steps to increase self-efficacy, the importance of teacher collaboration, and professional development within an elementary school. It was grounded by theoretical frameworks of self-efficacy …

A Numerical And Machine Learning Investigation Of Water Quality In The Northern Gulf Of Mexico, From Estuaries To Shelf, Yanda Ou

LSU Doctoral Dissertations

In this study, numerical and machine learning (ML) models are developed and adapted to investigate the water quality of the Barataria Estuary and the Louisiana-Texas (LaTex) Shelf in northern Gulf of Mexico. By using a 3-D hydrodynamic ROMS model, the salinity variability of the Barataria Estuary is found highly influenced by the Mississippi River discharges and man-made river diversion systems. The Mississippi River freshwater can intrude into the estuary through the middle and the east passes. Sensitivity tests indicate that decreases in lower estuarine salinity due to the elevated Mississippi River discharges are more apparent than the salinity increases due …

Are Teachers Prepared For Writing? Insight On The Training And Development Of Teachers For Writing Instruction In K-2 Classrooms, Denise Shillingsburg Rueter

LSU Doctoral Dissertations

This multiple case study examined the degree to which pre-service teachers were prepared to teach writing and how these skills were further developed in the beginning years of teaching to ensure students were receiving foundational literacy skills to be successful in both reading and writing. The setting for this study took place in an urban charter school and a suburban traditional public school in southeastern Louisiana. The participants for this study included two university instructors of teacher preparation programs who taught literacy methods courses. Also included were four K-2 classroom teachers, one kindergarten teacher, one second-grade teacher, and two first-grade …

Investigating The Theoretical Orientations Of Select Louisiana Preservice Teachers Regarding Teaching Reading: A Mixed-Methods Study, Megan Jenny

LSU Doctoral Dissertations

Teacher quality is one of the most significant factors contributing to student success, and Teacher Preparation Programs (TPPs) are traditionally responsible for teaching preservice teachers how to teach reading. Effective reading instruction is responsive, complex, and equitable. Acknowledgement of a disconnect between preparation programming and critical teacher knowledge for teachers of reading indicated a need for this exploratory mixed-methods study. The purpose of the current study, grounded by the theoretical framework of Sociocultural Theory, was to investigate what a select group of 21 preservice grades 1-3 elementary teachers were taught about teaching reading, preservice teachers’ theoretical orientations for teaching reading, …

Of Language And Thought: American Political Discourse, Normative Reason, And Essentially Contested Concepts, Riley Clare Valentine

LSU Doctoral Dissertations

This dissertation analyzes progressive liberalism and neoliberalism as forms of normative reason that redefine specific political concepts, which are central to American liberalism – equality, liberty, the role of the State, and the pursuit of happiness. I contend that language is an important expression of normative reason. Language is how political reason and the norms accompanying it are expressed. I move through Presidents Franklin Delano Roosevelt to Barack Obama, exploring shifts in language and interpretations of political concepts through progressive liberal and neoliberal forms of normative reason. I argue that a tension emerges between progressive liberalism and neoliberalism, and a …

Event Horizons Are Tunable Factories Of Quantum Entanglement, Ivan Agullo, Anthony J. Brady, Dimitrios Kranas

Faculty Publications

That event horizons generate quantum correlations via the Hawking effect is well known. We argue, however, that the creation of entanglement can be modulated, as desired, by appropriately illuminating the horizon. We adapt techniques from quantum information theory to quantify the entanglement produced during the Hawking process and show that, while ambient thermal noise (e.g. cosmic microwave background radiation) degrades it, the use of squeezed inputs can boost the nonseparability between the interior and exterior regions in a controlled manner. We further apply our ideas to analog event horizons concocted in the laboratory and insist that the ability to tune …

Quantization Of The Free Poisson Central Limit Theorem, Yungang Lu

Journal of Stochastic Analysis

No abstract provided.

Wave-Front Reconstruction Via Single-Pixel Homodyne Imaging, Savannah L. Cuozzo, Charris Gabaldon, Pratik J. Barge, Ziqi Niu, Hwang Lee, Lior Cohen, Irina Novikova, Eugeniy E. Mikhailov

Faculty Publications

We combine single-pixel imaging and homodyne detection to perform full object recovery (phase and amplitude). Our method does not require any prior information about the object or the illuminating fields. As a demonstration, we reconstruct the optical properties of several semi-transparent objects and find that the reconstructed complex transmission has a phase precision of 0.02 radians and a relative amplitude precision of 0.01.

Extended Bethe-Richardson-Gaudin Ansatzes For The Solution Of A Mean-Field Plus Separable Pairing Model With Three Non-Degenerate J-Orbits, Feng Pan, Yingxin Wu, Shengze Guan, Zhibo Qu, Lianrong Dai, J. P. Draayer

Faculty Publications

Based on the Bethe-Richardson-Gaudin ansatz for the standard pairing model, extended Bethe- Richardson-Gaudin ansatzes for eigenvectors of a spherical mean-field plus separable pairing model with three non-degenerate j-orbits are proffered. It is shown that the number of variables appearing in the general extended ansatz eigenvectors for given number of pairs N is N(N+1)/2. More importantly, when one of the j orbits is 1/2, there are only 2N variables involved in the alternative extended ansatz eigenvectors, which, like the standard pairing model, can be solved efficiently. Numerical results for an application of the model in the ds-shell up to its half-filling …