Digital Commons Network^™

S-Wave Scattering Lengths For The Be 7 +P System From An R-Matrix Analysis, S. N. Paneru, C. R. Brune, R. Giri, R. J. Livesay, U. Greife, J. C. Blackmon, D. W. Bardayan, K. A. Chipps, B. Davids, D. S. Connolly, K. Y. Chae, A. E. Champagne, C. Deibel, K. L. Jones, M. S. Johnson, R. L. Kozub, Z. Ma, C. D. Nesaraja, S. D. Pain, F. Sarazin, J. F. Shriner, D. W. Stracener, M. S. Smith, J. S. Thomas, D. W. Visser, C. Wrede

Faculty Publications

The astrophysical S factor for the radiative proton capture reaction on Be7 (S17) at low energies is affected by the s-wave scattering lengths. We report the measurement of elastic and inelastic scattering cross sections for the Be7+p system in the center-of-mass energy range 0.474-2.740 MeV and center-of-mass angular range 70-150. A radioactive Be7 beam produced at Oak Ridge National Laboratory's (ORNL) Holifield Radioactive Ion Beam Facility was accelerated and bombarded a thin polypropylene (CH2)n target. Scattered ions were detected in the segmented Silicon Detector Array. Using an R-matrix analysis of ORNL and Louvain-la-Neuve cross-section data, the s-wave scattering lengths for …

Generic Absence Of Strong Singularities And Geodesic Completeness In Modified Loop Quantum Cosmologies, Sahil Saini, Parampreet Singh

Faculty Publications

Different regularizations of the Hamiltonian constraint in loop quantum cosmology (LQC) yield modified loop quantum cosmologies, namely mLQC-I and mLQC-II, which lead to qualitatively different Planck scale physics. We perform a comprehensive analysis of resolution of various singularities in these modified loop cosmologies using effective spacetime description and compare with earlier results in standard LQC. We show that the volume remains non-zero and finite in finite time evolution for all considered loop cosmological models. Interestingly, even though expansion scalar and energy density are bounded due to quantum geometry, curvature invariants can still potentially diverge due to pressure singularities at a …

Von Neumann Stability Of Modified Loop Quantum Cosmologies, Sahil Saini, Parampreet Singh

Faculty Publications

von Neumann stability analysis of quantum difference equations in loop quantized spacetimes has often proved useful to understand the viability of quantizations and whether a general relativistic description is recovered at small spacetime curvatures. We use this technique to analyze the infrared behavior of the quantum Hamiltonian constraint in recently explored modifications of loop quantum cosmology: mLQC-I and mLQC-II, for the spatially flat FLRW model. We investigate the behavior for the μo scheme, where the minimum area of loops in the quantization procedure does not take physical metric in to account, and the μ scheme where quantization procedure uses a …

Star Cluster Catalogues For The Legus Dwarf Galaxies, D. O. Cook, J. C. Lee, A. Adamo, H. Kim, R. Chandar, B. C. Whitmore, A. Mok, J. E. Ryon, D. A. Dale, D. Calzetti, J. E. Andrews, A. Aloisi, G. Ashworth, S. N. Bright, T. M. Brown, C. Christian, M. Cignoni, G. C. Clayton, R. Da Silva, S. E. De Mink, C. L. Dobbs, B. G. Elmegreen, D. M. Elmegreen, A. S. Evans, M. Fumagalli, J. S. Gallagher, D. A. Gouliermis, K. Grasha, E. K. Grebel, A. Herrero, D. A. Hunter, E. I. Jensen, K. E. Johnson

Faculty Publications

We present the star cluster catalogues for 17 dwarf and irregular galaxies in the HST Treasury Program 'Legacy ExtraGalactic UV Survey' (LEGUS). Cluster identification and photometry in this sub-sample are similar to that of the entire LEGUS sample, but special methods were developed to provide robust catalogues with accurate fluxes due to low cluster statistics. The colours and ages are largely consistent for two widely used aperture corrections, but a significant fraction of the clusters are more compact than the average training cluster. However, the ensemble luminosity, mass, and age distributions are consistent suggesting that the systematics between the two …

Ab Initio Folding Potentials For Nucleon-Nucleus Scattering Based On No-Core Shell-Model One-Body Densities, M. Burrows, Ch Elster, S. P. Weppner, K. D. Launey, P. Maris, A. Nogga, G. Popa

Faculty Publications

Background: Calculating microscopic optical potentials for elastic nucleon-nucleus scattering has already led to large body of work in the past. For folding first-order calculations the nucleon-nucleon (NN) interaction and the one-body density of the nucleus were taken as input to rigorous calculations in a spectator expansion of the multiple scattering series. Purpose: Based on the Watson expansion of the multiple scattering series we employ a nonlocal translationally invariant nuclear density derived from a chiral next-to-next-to-leading order (NNLO) and the very same interaction for consistent full-folding calculation of the effective (optical) potential for nucleon-nucleus scattering for light nuclei. Methods: The first …

Inflammatory Reproductive White Adipose Tissue Characterizes The Obese Preeclamptic-Like Bph/5 Mouse Prior To Pregnancy, Kelsey Olson

Honors Capstones

No abstract provided.

The Effect Of Environmental, Facility, And Resident Characteristics On Antipsychotic Usage Rates In Louisiana Certified Nursing Facilities, Emma Looney

Honors Capstones

No abstract provided.

Rule-Governed Behavior: Teaching Essential School Readiness Skills Via Rule-Following To Children With Autism, Rachel Lorraine Bradley

LSU Doctoral Dissertations

Rule-governed behavior (RGB) is behavior that is controlled by verbal descriptions of contingencies rather than by direct contact or a history of direct contact with the contingencies. Humans rely on RGB to navigate a multitude of life experiences, and in doing so, we avoid direct contact with destructive or harmful contingencies or contingencies that would be inefficient to contact. However, individuals with autism spectrum disorders (ASD) do not naturally demonstrate RGB, leaving them at increased risk of contacting dangerous consequences. Thus, acquiring RGB is a critical concern that affects the development and wellbeing of individuals with ASD. The current study …

Picture Cued And Speech Production Cued Approaches For Speech Sound Learning, Michelyve C. Petit

LSU Master's Theses

This study examined the use of speech production cued cards, MorphoPhonic faces (MPF), and plain picture (PP) cards when seeking to remediate speech sound errors, specifically sounds / ɹ / and / s / in the word initial position. Fourteen children were provided articulation therapy at their public school using both stimulus types across four weeks. Each week, the total number of correct productions of target phoneme / s / and /ɹ/ were recorded and averaged. These results were used to graphically showcase trends in their performance with both stimulus types. The results demonstrated that MPF cards were advantageous for …

Assessing The Nutritional Value Of Black Soldier Fly Larvae (Hermetia Illucens) Used For Reptile Foods, Kimberly L. Boykin

LSU Master's Theses

Black soldier fly (BSF) larvae have been studied extensively in animal feed production, but there is limited research for non-production species, such as reptiles, despite their popularity as a calcium-rich feeder insect. The goals of this thesis were to determine the nutritive value of BSF larvae for a lizard species and as an ingredient in a diet formulated for snakes.

BSF larvae are deficient in fat soluble vitamins (A, D, and E). Using vitamin A as a test nutrient, several factors were identified that affect the success and consistency of gut loading. Based on the results, the following gut loading …

Falling On Deaf Ears: Social Workers’ Attitudes About Deafness, Hearing Loss, And Deaf Cultural Competence, Esperanza J. Garibay

LSU Master's Theses

D/deaf and hard of hearing people have lower health literacy and higher rates of misdiagnosis of serious illnesses than their hearing counterparts (Sheier, 2009). This is, in part, a result of the inaccessible and culturally incompetent care provided to d/Deaf and hard of hearing individuals (Kuenburg, Fellinger & Fellinger, 2016; Hoang, LaHousse, Nakaji & Sadler, 2010 Sheier, 2009). Inaccessible and culturally incompetent care may be byproducts of human service providers’ attitudes towards d/Deaf and hard of hearing people (Ulloa, 2014; Cooper, Mason & Rose, 2005), and providers’ level of competence with properly caring for d/Deaf and hard of hearing clients …

In Search Of National Identity: Portraits Of Motherless Women In Clarín And Galdós, Leslie I. Quezada

LSU Master's Theses

Drawing on novels by Leopoldo Alas Clarín and Benito Pérez Galdós, I will examine the portraits of women in La Regenta (1885), Tristana (1892), andLa de San Quintín (1894). By exploring how women in the works are reflected in terms of identity and nature of their role from a male-authored perspective, I will study how different aspects influence the development of their character, as well as the issues they face when searching for their identity. Galdós and Clarín unravel the women to embody the nation of Spain and the conditions it was going through before the …

Coupling Of Acetaldehyde To Crotonaldehyde On Ceo 2-X (111): Bifunctional Mechanism And Role Of Oxygen Vacancies, Chuanlin Zhao, Charles Watt, Paul R. Kent, Steven H. Overbury, David R. Mullins, Florencia C. Calaza, Aditya Savara, Ye Xu

Faculty Publications

Selective C-C coupling of oxygenates is pertinent to the manufacture of fuel and chemical products from biomass and from derivatives of C 1 compounds (i.e., oxygenates produced from methane and CO 2 ). Here we report a combined experimental and theoretical study on the temperature-programmed reaction (TPR) of acetaldehyde (AcH) on a partially reduced CeO 2-x (111) thin film surface. The experiments have been carried out under ultra-high-vacuum conditions without continuous gas exposure, allowing better isolation of active sites and reactive intermediates than in flow reaction conditions. AcH does not undergo aldol condensation in a typical TPR procedure, even though …

Determining Nutrient Recommendations For Agricultural Crops Based On Soil And Plant Tissue Analyses Between Different Analytical Laboratories, Lauren Liuzza

LSU Master's Theses

There is limited information concerning the disparities between soil and plant tissue testing laboratories. Soil and plant tissue analyses are crucial to determining nutrient applications for agricultural field crops. Accurate fertility inputs improve crop production and long-term agricultural sustainability. The over application of nutrients can potentially decrease yields and reduce profits. A study was established in 2016 at Louisiana State University at Alexandria (LSUA) in Alexandria, Louisiana to 1) assess and compare soil and plant tissue nutrient values, ratings and recommendations between research and commercial laboratories for field corn (Zea mays) and soybean (Glycine max), and …

Making The Commercial Non-Commercial: Traditional Ad Effects On Tv Billboards, Ian M. Skupski

LSU Master's Theses

Using a 2x2 experimental design, this study evaluated the effectiveness of two ad factors on TV billboards. Four experimental conditions were created around a previously aired Olympic hockey game to measure how contextual fit and cross-promotion affect audience evaluations of a brand presented on a TV billboard. The hypotheses predicted measurable effects based on past advertisement and sponsorship literature. A total of 150 usable respondents returned significant main effect results, as well as supporting interaction effect results. Particularly, contextual fit encouraged participant purchase intention and the presence of cross-promotion encouraged more positive attitudes toward a brand. Limitations and future research …

Identification And Reduction Of Uncertainties In Watershed-Scale Flow And Water Quality Modeling, Maryam Roostaee

LSU Doctoral Dissertations

This study identified important uncertainties affecting watershed-scale flow and water quality simulations and recommended modeling options for reducing the uncertainties by means of the Hydrological Simulation Program-FORTRAN (HSPF) model. Specifically, parameter-induced uncertainties in HSPF model were estimated along with uncertainties associated with DEM resolutions and sources. National Elevation Dataset (NED) DEMs with original and resampled resolutions of 3.5, 10, 30 and 100m were utilized for manual and automatic delineation of three watersheds with different gradients in HSPF model to identify the effects of DEM resolution, DEM resampling, delineation method and watershed gradient on the simulation of streamflow, nitrate (NO_{3 …}

Plasticity, Technicity, Writing, Deborah Goldgaber

Faculty Publications

No abstract provided.

Dynamics Of Dirac Observables In Canonical Cosmological Perturbation Theory, Kristina Giesel, Parampreet Singh, David Winnekens

Faculty Publications

The relational formalism based on geometrical clocks and Dirac observables in linearized canonical cosmological perturbation theory is used to introduce an efficient method to find evolution equations for gauge invariant variables. Our method generalizes an existing technique by Pons et al (2010 J. Phys.: Conf. Ser. 222 012018); (2009 Phys. Rev. D 80 084015) to relate the evolution of gauge invariant observables with the one of gauge variant quantities, and is applied as a demonstration for the longitudinal and spatially flat gauges. Gauge invariant evolution equations for the Bardeen potential and the Mukhanov-Sasaki variable are derived in the extended ADM …

Item Comparison Of Two Language Assessments In Children With Autism Spectrum Disorder, Christina M. Hensgens

LSU Master's Theses

The language skills of children with ASD vary across the population and prove challenging to assess for many reasons. The current study was designed to compare two language assessments for children with ASD to gain understanding in determining the best method for assessment. The Preschool Language Scale-5 (PLS-5) is a standardized language assessment commonly used in the field of Speech-Language Pathology, while the Verbal Behavioral Milestones Assessment and Placement Program (VB-MAPP) is commonly used in Applied Behavior Analysis. Scores from children with ASD (N=17) on a total of 64 functionally equivalent items from both assessments were analyzed to determine the …

Examining The Effect Of Multiple Route Choice Criteria On Hurricane Evacuation Traffic Through External Validation Of Simulations, Haggai D. Davis Iii

LSU Master's Theses

Hurricane evacuations can be a chaotic experience for individuals involved, but researchers have attempted to find patterns in the routes people take. One paper laid out a model for predicting route choice based upon features that are different than standard route choice influencers. This thesis attempted to evaluate the accuracy of that model by using TransModeler modeling software. Using the building blocks of the HEMP project, this project compared the new model to the standard model and evaluated the two based upon the ability to reproduce real-world results. Interestingly, the two did not come out significantly different possibly because the …

Intraspecific Variation In A Dominant Prey Species Can Bias Marine Predator Dietary Estimates Derived From Stable Isotope Analysis, Michael J. Polito, Wayne Z. Trivelpiece, Christian S. Reiss, Susan G. Trivelpiece, Jefferson T. Hinke, William P. Patterson, Steven D. Emslie

Faculty Publications

No abstract provided.

The Stock Market Effects Of Amazon’S Sales Tax Collection Announcements, Andrew Chenevert

Honors Capstones

No abstract provided.

Effects Of Defoliation On The Resistance And Tolerance Of Rice, Oryza Sativa, To Root Injury By The Rice Water Weevil, Lissorhoptrus Oryzophilus, Emily C. Kraus, Michael J. Stout

Faculty Publications

© 2019 The Netherlands Entomological Society Understanding plant-mediated interactions in agricultural systems may facilitate the development of novel and improved management practices, which is important, as management of these insects is currently heavily reliant on insecticides. The fall armyworm, Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae, Prodeniini), is a sporadic pest of rice fields in the southern USA. In southwestern Louisiana, this defoliating insect typically attacks rice early in the growth season, before fields are flooded. Defoliation by fall armyworm larvae may trigger increased expression of plant defenses, which may result in increased resistance to subsequent herbivores. The rice water weevil …

Amplification Dynamics Of Platy-1 Retrotransposons In The Cebidae Platyrrhine Lineage, Jessica M. Storer, Jackson R. Mierl, Sarah A. Brantley, Breanna Threeton, Yahor Sukharutski, Lydia C. Rewerts, Corey P. St Romain, Madeline M. Foreman, Jasmine N. Baker, Jerilyn A. Walker, Joseph D. Orkin, Amanda D. Melin, Kimberley A. Phillips, Miriam K. Konkel, Mark A. Batzer

Faculty Publications

© 2019 The Author(s). Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. Platy-1 elements are Platyrrhine-specific, short interspersed elements originally discovered in the Callithrix jacchus (common marmoset) genome. To date,only themarmoset genomehas been analyzed for Platy-1 repeat content.Here,we report full-length Platy-1 insertions in other NewWorld monkey (NWM) genomes (Saimiri boliviensis, squirrel monkey; Cebus imitator, capuchin monkey; and Aotus nancymaae, owl monkey) and analyze the amplification dynamics of lineage-specific Platy-1 insertions. A relatively small number of full-length and lineage-specific Platy-1 elements were found in the squirrel, capuchin, and owl monkey genomes compared with the …

Fifty Shades Of Brown: Macroevolution Of Plumage Brightness In The Furnariida, A Large Clade Of Drab Neotropical Passerines, Rafael S. Marcondes, Robb T. Brumfield

Faculty Publications

© 2019 The Author(s). Evolution © 2019 The Society for the Study of Evolution. Both natural and sexual selection are thought to affect the evolution of bird color. Most studies of the topic have focused on sexually dichromatic taxa and showy plumages, which are expected to be more influenced by social selection and usually result in increased conspicuousness. However, many bird clades display dull brown or gray plumages that vary greatly in brightness (lightness), but little in hue (shade). Here, we examine the macroevolution of brightness in one such clade, the Furnariida. We make comparisons across light environments, body parts, …

A Genetic Screen For Second Site Suppressor Mutations Of Extended Gene Silencing In Saccharomyces Cerevisiae, Laurie Lyon

Honors Capstones

No abstract provided.

Holidays And Families: A Field Report Of A Unit Done In A 1st Grade Classroom, Madison Liggio

Honors Capstones

No abstract provided.

3d-Printed Culture Plate Insert With Agarose Barrier For The Evaluation Of Stem-Cancer Cell Signaling., Erika M. Lewis

Honors Capstones

No abstract provided.

Exploring New Fe-Substituted Rare-Earth-Based High Entropy Alloys, Glendon Rewerts

Honors Capstones

No abstract provided.

Risk Factors Associated With Juvenile Delinquency, Karly A. Kyzar

Honors Capstones

No abstract provided.