Digital Commons Network^™

Assessing Mealtime Macronutrient Content: Patient Perceptions Versus Expert Analyses Via A Novel Phone App, Melanie B. Gillingham, Zoey Li, Roy W. Beck, Peter Calhoun, Jessica R. Castle, Mark Clements, Eyal Dassau, Francis J. Doyle, Robin L. Gal, Peter Jacobs, Susana R. Patton, Michael R. Rickels, Michael Riddell, Corby K. Martin

Clinical Research Faculty Publications

Background: People with type 1 diabetes estimate meal carbohydrate content to accurately dose insulin, yet, protein and fat content of meals also influences postprandial glycemia. We examined accuracy of macronutrient content estimation via a novel phone app. Participant estimates were compared with expert nutrition analyses performed via the Remote Food Photography Method (RFPM). Methods: Data were collected through a novel phone app. Participants were asked to take photos of meals/snacks on the day of and day after scheduled exercise, enter carbohydrate estimates, and categorize meals as low, typical, or high protein and fat. Glycemia was measured via continuous glucose monitoring. …

A Unified Model Of Crustal Stress Heterogeneity From Borehole Breakouts And Earthquake Focal Mechanisms, Karen Luttrell, Jeanne Hardebeck

Faculty Publications

© 2020. American Geophysical Union. All Rights Reserved. Observations of crustal stress orientation from the regional inversion of earthquake focal mechanisms often conflict with those from borehole breakouts, possibly indicating local stress heterogeneity, either laterally or with depth. To investigate this heterogeneity, we compiled SHmax estimates from previous studies for 57 near-vertical boreholes with measured breakout azimuths across the Los Angeles region. We identified subsets of earthquake focal mechanisms from established earthquake catalogs centered around each borehole with various criteria for maximum depth and maximum lateral distance from the borehole. Each subset was independently inverted for 3-D stress orientation and …

Multifunctional Films For Thermoplastic Composite Joints: Ultrasonic Welding And Damage Detection Under Tension Loading, Wencai Li, Harry Frederick, Genevieve Palardy

Faculty Publications

This paper investigates the use of multi-walled carbon nanotube/polypropylene (MWCNT/PP) films to enable ultrasonic welding and damage detection of glass fiber/polypropylene (GF/PP) composite joints in a single lap configuration. Three MWCNT concentrations above electrical percolation (15–25 wt%) were chosen to weld GF/PP adherends. The effect of MWCNT content on the welding process was evaluated by comparing weld quality through lap shear strength (LSS) tests and fractography analysis. Films containing 15 and 20 wt% MWCNT had no significant effect on the welding process, while 25 wt% reduced LSS by up to 39% compared to pure PP films due to their brittleness. …

Testing Grease Consistency, Alan Gurt, Michael M. Khonsari

Faculty Publications

Because of the influential role of consistency in selecting a grease for a given application, accurate and meaningful methodologies for its measurements are vitally important. A new method, recently introduced, uses a rheometer to compress a grease sample to evaluate a relative consistency between a fresh and degraded grease; however, the results of this approach compared to a standard penetrometer and other methods of assessing consistency have not been studied. This paper takes a closer look at the relevant parameters involved in the rheometer penetration test and establishes a recommended procedure for its use. The consistency of various greases is …

Streamline-Based Simulation Of Nanoparticle Transport In Field-Scale Heterogeneous Subsurface Systems, Bin Wang, Yin Feng, John Blears, Karsten Thompson, Richard Hughes

Faculty Publications

Nanoparticle (NP) transport is increasingly relevant to subsurface engineering applications such as aquifer characterization and enhanced oil recovery. An efficient field-scale simulation framework is critical for predicting NP performance and designing subsurface applications. In this work, for the first time, a streamline-based model is presented to simulate NP transport in field-scale subsurface systems with heterogeneous permeability. It considers a series of smart behaviors exhibited by engineered nanoparticles (NPs), including time-triggered encapsulation, retention, formation damage effects and variable nanofluid viscosity. The key methods employed by the algorithm are streamline-based simulation (SLS) and an operator-splitting (OS) technique for modeling NP transport. The …

T2k Measurements Of Muon Neutrino And Antineutrino Disappearance Using 3.13×1021 Protons On Target, K. Abe, N. Akhlaq, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, M. Antonova, S. Aoki, T. Arihara, Y. Asada, Y. Ashida, E. T. Atkin, Y. Awataguchi, G. J. Barker, G. Barr, D. Barrow, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, L. Berns, S. Bhadra, A. Blondel, S. Bolognesi, T. Bonus, B. Bourguille, S. B. Boyd, A. Bravar

Faculty Publications

We report measurements by the T2K experiment of the parameters θ23 and Δm322, which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNS neutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from 1.49×1021 protons on target (POT) in neutrino mode and 1.64×1021 POT in antineutrino mode are used. The best-fit values obtained by T2K were sin2(θ23)=0.51-0.07+0.06(0.43-0.05+0.21) and …

Developing Teachers’ Ability To Provide Culturally Relevant Pedagogy, London R. Moore

LSU Doctoral Dissertations

The purpose of this study was to understand the nature of developing teachers’ ability to provide Culturally Relevant Pedagogy (CRP). This study places the teacher as the catalyst for change in African American students’ experience. Based on an examination of past research, this study turned to CRP as the instructional shift needed to impact the educational experience for African American students and a professional learning community (PLC) as the vehicle for developing eight teachers’ ability to provide CRP in their classrooms. The study was guided by the following research question: What is the nature of developing teachers ability to provide …

Topological Hall Effect And Magnetic States In The Nowotny Chimney Ladder Compound Cr11ge19, Yu Li, Xin Gui, Mojammel A. Khan, Weiwei Xie, David P. Young, J. F. Ditusa

Faculty Publications

We have investigated the magnetic and charge transport properties of single crystals of the Nowotny chimney ladder compound Cr11Ge19 and mapped out a comprehensive phase diagram reflecting the complicated interplay between the Dzyaloshinskii-Moriya (DM) interaction, the dipolar interaction, and the magnetic anisotropy. We have identified a set of interesting magnetic phases and attributed a finite topological Hall effect to the recently discovered biskyrmion phase. These data also suggest the existence of an antiskyrmion state at finite fields for temperatures just below the magnetic ordering temperature Tc as indicated by a distinct change in sign of the topological Hall effect. Above …

Helical Magnetic Order And Fermi Surface Nesting In Noncentrosymmetric Scfege, Sunil K. Karna, D. Tristant, J. K. Hebert, G. Cao, R. Chapai, W. A. Phelan, Q. Zhang, Y. Wu, C. Dhital, Y. Li, H. B. Cao, W. Tian, C. R. Dela Cruz, A. A. Aczel, O. Zaharko, A. Khasanov, M. A. Mcguire, A. Roy, W. Xie, D. A. Browne, I. Vekhter, V. Meunier, W. A. Shelton, P. W. Adams, P. T. Sprunger, D. P. Young, R. Jin, J. F. Ditusa

Faculty Publications

An investigation of the structural, magnetic, thermodynamic, and charge transport properties of noncentrosymmetric hexagonal ScFeGe reveals it to be an anisotropic metal with a transition to a weak itinerant incommensurate helimagnetic state below TN=36 K. Neutron diffraction measurements discovered a temperature and field independent helical wave vector k = (0 0 0.193) with magnetic moments of 0.53 μB per Fe confined to the ab plane. Density functional theory calculations are consistent with these measurements and find several bands that cross the Fermi level along the c axis with a nearly degenerate set of flat bands just above the Fermi energy. …

Potential Gravitational Wave Signatures Of Quantum Gravity, Ivan Agullo, Vitor Cardoso, Adrián Del Rio, Michele Maggiore, Jorge Pullin

Faculty Publications

We show that gravitational wave astronomy has the potential to inform us on quantum aspects of black holes. Based on Bekenstein's quantization, we find that black hole area discretization could impart observable imprints to the gravitational wave signal from a pair of merging black holes, affecting their absorption properties during inspiral and their late-time relaxation after merger. In contrast with previous results, we find that black hole rotation, ubiquitous in astrophysics, improves our ability to probe quantum effects. Our analysis shows that gravitational wave echoes and suppressed tidal heating are signs of new physics from which the fundamental quantum of …

Magnetic Gradient Drilling, Babak Akbari, Garrett L. Nielsen

College of Engineering Patents

Aspects of magnetic gradient drilling are described. In one embodiment, a system includes a drill pipe, drilling fluid, and a magnetic assembly tool connected to or integrated with the drill pipe. Among other elements, the magnetic assembly tool can include a magnetic field generator configured to generate a magnetic field and create an additional pressure drop in the drilling fluid outside the drill pipe, and a magnetic shielding material configured to shield the magnetic field from inside the drill pipe.

Click Conjugation Of Boron Dipyrromethene (Bodipy) Fluorophores To Egfr-Targeting Linear And Cyclic Peptides, Tyrslai M. Williams, Nichole E.M. Kaufman, Zehua Zhou, Sitanshu S. Singh, Seetharama D. Jois, Maria Da Graça H. Vicente

Faculty Publications

Through a simple 1,3-cycloaddition reaction, three BODIPY-peptide conjugates that target the extracellular domain of the epidermal growth factor receptor (EGFR) were prepared and their ability for binding to EGFR was investigated. The peptide ligands K(N3)LARLLT and its cyclic analog cyclo(K(N3)larllt, previously shown to have high affinity for binding to the extracellular domain of EGFR, were conjugated to alkynyl-functionalized BODIPY dyes 1 and 2 via a copper-catalyzed click reaction. This reaction produced conjugates 3, 4, and 5 in high yields (70-82%). In vitro studies using human carcinoma HEp2 cells that overexpress EGFR demonstrated high cellular uptake, particularly for the cyclic peptide …

Cognitive Maturity As An Intervening Influence On Exposure To Adverse Childhood Experiences, Negative Attributions, And Symptoms Of Depression Among Pre-Adolescent And Adolescent Youth., Mckenzie Marie Ketchum

LSU Doctoral Dissertations

Most depression interventions targeted to youth are adapted from adult curricula without enough consideration given to the developmental level and capacity of the intended audience (Kovacs & Lopez-Duran, 2012). Although depression in youth has received recognition and treatment, there remains a gap between the theoretical knowledge base of youth cognitive development and the application of this knowledge to the innovation of developmentally appropriate depression interventions suited for youth of varying levels of cognitive maturity. The current study investigated the influence of cognitive development over the moderation of negative attributions on the relationship between exposure to Adverse Childhood Experiences (ACEs) and …

Parameter Estimation And Optimization For Biological Mathematical Models Using Bayesian Statistics, Renee Dale

LSU Master's Theses

In the field of biology, mathematical models are increasingly used to address biological questions and the large data sets generated in experimental studies. Mathematical models traditionally are simplified and structured to be analytically tractable, but computing power allows for more complex, larger models. Bayesian statistics lends itself naturally to address parameter estimation problems in these large models. Bayesian statistical inference is utilized in this thesis to obtain parameter estimates from a sparse data set on populations in the HIV epidemic. Current estimates of the HIV epidemic indicate a decrease in the incidence of the disease in the undiagnosed subpopulation over …

Quality Assessment Of Flexible Pavement Automated Cracking Data In Louisiana, Mostafiz Emtiaz

LSU Master's Theses

Pavement distress survey is the most critical and integral part of pavement management system. Transportation agencies all over the world depends on the accurate pavement distress survey to take major decisions like pavement rehabilitation or reconstruction. Pavement management at the network level requires accurate pavement distress survey to decide the allocation of budget for pavement maintenance, rehabilitation and reconstruction. This study started collected network-level cracking distress data through manual measurements on high-resolution pavement images and the results were used as the ground truth measurements to evaluate the corresponding automated distress data from the Pavement Management System database. Results showed that …

Covariance Of The Extended Holonomy, Rodolfo Gambini, Jorge Pullin, Aureliano Skirzewski

Faculty Publications

It has been pointed out that the holonomy of generic extended loops is not gauge covariant. We show how to define a family of extended loops for which previous criticism does not apply. We also give sufficient conditions that extended loops must satisfy in order to yield covariant holonomies. This makes a quantum representation for Yang-Mills theories and gravity based on extended loops viable.

Zein And Lignin-Based Nanoparticles As Delivery Systems: Pesticide Release And Nanoparticle Health Impact On Soybean Plants, Fallon Polette Salinas Gonzalez

LSU Doctoral Dissertations

This research examined the effect of biodegradable, polymeric, lignin-based nanoparticles (LNPs, 113.8±3.4, negatively charged) and zein nanoparticles (ZNP, 141.6±3.9, positively charged) on soybean plant health. The LNPs were synthesized from lignin, covalently linked to poly(lactic-co-glycolic) acid by emulsion evaporation. ZNPs were synthesized by nanoprecipitation. Soybeans grown hydroponically were treated with three concentrations (0.02, 0.2, and 2 mg/ml) of NPs at 28 days after germination. The effect of ZNPs and LNPs on plant health was determined through analysis of root and stem length, chlorophyll concentration, dry biomass of roots and stem, as well as carbon, nitrogen, and micronutrient absorption after 1, …

Development Of Engineered Soil Surrogates For Modeling Natural Soil Sorption Behavior, Ghada Yehia Abdalla

LSU Doctoral Dissertations

The land produces more than 95% of the global food supply, and with a continuously growing population, we need to optimize the use of the available agricultural land. Soil organic matter (SOM) is an essential component of soils, especially concerning their fertility and sorption behavior. The chemical composition of the SOM consists of lipids, lignin, and cellulose. However, the heterogeneous and complex nature of SOM, and real soils, makes their study challenging and introduces uncontrollable factors.

Therefore, structural mimics of natural soils with increasing complexity representing the real soil functionality were synthesized and evaluated for bulk properties related to their …

A Virtual Community Of Practice: Impact On Instructional Design Knowledge And The Cultural Elements Evident Within Interactions Among Nigerian Faculty, Hala Walid Esmail

LSU Doctoral Dissertations

With the expansion of higher education and the growth of online course offerings in Sub-Saharan Africa, there is a critical need to support faculty in developing the necessary skills to teach effectively online. The purpose of this qualitative, single-case study was to examine the nature of the discourse in which faculty members engaged within a virtual community of practice that was created to support their instructional design and online teaching efforts. The community of practice framework and the related learning theories of situated learning and social constructivism served as the underpinning of this study. The E-Learning Program was facilitated via …

Development Of The Cell-Free Protein Biomanufacturing Platform For The Therapeutic Human Protein Production And The Topical Delivery Applications Using The Nanosized Hydrogel System, Jeehye Kim

LSU Doctoral Dissertations

Proteins are highly structural polymers, performing an enormous range of roles within organisms. Unlike synthetic polymers, proteins have a significant hierarchical ordering that can be disrupted by many environmental factors, which limits the scale-up manufacturing capability as well as the utilization of proteins as therapeutic agents. In this study, the Cell-Free Protein Synthesis (CFPS) system was developed to enhance the production capacity and applications of the therapeutic proteins. The CFPS is an advanced biosynthetic and genetic-engineered system. It enables the efficient production of proteins when the conventional cell-based protein synthesis systems cannot be applied, and when sophisticated control is required …

Patterns Of Relative And Quantitative Abundances Of Marine Bacteria In Surface Waters Of The Subtropical Northwest Pacific Ocean Estimated With High-Throughput Quantification Sequencing, Jie Kong, Xin Liu, Lei Wang, Hao Huang, Danyun Ou, Jiayu Guo, Edward A. Laws, Bangqin Huang

Faculty Publications

Bacteria play a pivotal role in shaping ecosystems and contributing to elemental cycling and energy flow in the oceans. However, few studies have focused on bacteria at a trans-basin scale, and studies across the subtropical Northwest Pacific Ocean (NWPO), one of the largest biomes on Earth, have been especially lacking. Although the recently developed high-throughput quantitative sequencing methodology can simultaneously provide information on relative abundance, quantitative abundance, and taxonomic affiliations, it has not been thoroughly evaluated. We collected surface seawater samples for high-throughput, quantitative sequencing of 16S rRNA genes on a transect across the subtropical NWPO to elucidate the distribution …

Effects Of Spatial Variability On The Exposure Of Fish To Hypoxia: A Modeling Analysis For The Gulf Of Mexico, Elizabeth D. Labone, Kenneth A. Rose, Dubravko Justic, Haosheng Huang, Lixia Wang

Faculty Publications

The hypoxic zone in the northern Gulf of Mexico varies spatially (area, location) and temporally (onset, duration) on multiple scales. Exposure of fish to hypoxic dissolved oxygen (DO) concentrations (

Electrospray Deposition Of Zno Nanostructures For Nanoscale Electronic Applications, David Hooks

LSU Master's Theses

Modern technology is ever-evolving and as more emphasis is placed on faster, more sensitive electronic devices, advancements in the field of electronics are as important now as they ever have been. To meet the need for more sensitive devices, it is important to study new semiconducting materials and the applications in which they pose a potential advantage.

The field of electronic materials research falls at the intersection of physics, chemistry, materials science, and electrical engineering. Zinc Oxide (ZnO) is of particular interest in modern electronic devices for its uses in sensing applications, high-powered transistors, and LED technology. ZnO has been …

Evaluation Of Reproductive Phenology And Ecology Of The Eastern Wild Turkey (Meleagris Gallopavo Silvestris) In West-Central Louisiana, Erin E. Ulrey

LSU Master's Theses

Nest predation is the primary source of nest failure, with vegetative conditions at the nest sites considered drivers of reproductive success. Our current understanding of how incubating Eastern wild turkeys (Meleagris gallopavo silvestris, hereafter, wild turkey) use vegetative characteristic relating to specific predators of wild turkey nests is limited. We quantified the occurrence, diversity, and distribution of potential wild turkey nest predator species across Kisatchie National Forest and Peason Ridge WMA in central Louisiana in relation to vegetative conditions located within incubation ranges used by nesting female wild turkeys. We used 210 camera trap sites surveying 5,144 trap nights …

Amour Symphony Thesis, Vanessa C. Williams

LSU Master's Theses

The word Amour means love. Amour Symphony represents God's love to me. Each movement represents growing up as a Christian under the Love of God. Amour Symphony is a four movement symphony for full orchestra. Each movement follows the traditional movements of a symphony. Movement I is Sonata Form. Movement II is Theme and Variation Form. Movement III is Minuet and Trio Form. Movement IV is Sonata Form.

Trends In Growth Modeling In Fisheries Science, Shane A. Flinn, Stephen R. Midway

Faculty Publications

No abstract provided.

Asymptotic Security Of Discrete-Modulation Protocols For Continuous-Variable Quantum Key Distribution, Eneet Kaur, Saikat Guha, Mark M. Wilde

Faculty Publications

We consider discrete-modulation protocols for continuous-variable quantum key distribution (CV-QKD) that employ a modulation constellation consisting of a finite number of coherent states and that use a homodyne- or a heterodyne-detection receiver. We establish a security proof for collective attacks in the asymptotic regime, and we provide a formula for an achievable secret-key rate. Previous works established security proofs for discrete-modulation CV-QKD protocols that use two or three coherent states. The main constituents of our approach include approximating a complex, isotropic Gaussian probability distribution by a finite-size Gauss-Hermite constellation, applying entropic continuity bounds, and leveraging previous security proofs for Gaussian-modulation …

The Barley Hvwrky6 Transcription Factor Is Required For Resistance Against Pyrenophora Teres F. Teres, Prabin Tamang, Jonathan K. Richards, Shyam Solanki, Gazala Ameen, Roshan Sharma Poudel, Priyanka Deka, Karl Effertz, Shaun J. Clare, Justin Hegstad, Achintya Bezbaruah, Xuehui Li, Richard D. Horsley, Timothy L. Friesen, Robert S. Brueggeman

Faculty Publications

Barley is an important cereal crop worldwide because of its use in the brewing and distilling industry. However, adequate supplies of quality malting barley are threatened by global climate change due to drought in some regions and excess precipitation in others, which facilitates epidemics caused by fungal pathogens. The disease net form net blotch caused by the necrotrophic fungal pathogen Pyrenophora teres f. teres (Ptt) has emerged as a global threat to barley production and diverse populations of Ptt have shown a capacity to overcome deployed genetic resistances. The barley line CI5791 exhibits remarkably effective resistance to diverse Ptt isolates …

Removal Of Potentially Toxic Metal By Biochar Derived From Rendered Solid Residue With High Content Of Protein And Bone Tissue, Jong Hwan Park, Jin Ju Yun, Se Won Kang, Seong Heon Kim, Ju Sik Cho, Jim J. Wang, Dong Cheol Seo

Faculty Publications

The purpose of this study was to produce rendering animal carcass residue char (RACR-C) by pyrolyzing the solid residues of low-recyclable rendered pig carcasses and to evaluate their cadmium (Cd) adsorption characteristics and mechanisms. As the pyrolysis temperature increased, the inorganic content of RACR-C increased, while the carbon content decreased. In particular, the surface structure and chemistry of RACR-Cs prepared at different pyrolysis temperatures were well described by SEM-EDS, XRD, XRF, TGA, and FTIR. The Cd adsorption characteristics of RACR-C were in good agreement with the Langmuir isotherm and pseudo-second-order models, and the Cd adsorption capacities of RACR-Cs prepared at …

Hydroperiod And Salinity Interactions Control Mangrove Root Dynamics In A Karstic Oceanic Island In The Caribbean Sea (San Andres, Colombia), Jairo Humberto Medina-Calderón, José Ernesto Mancera-Pineda, Edward Castañeda-Moya, Víctor H. Rivera-Monroy

Faculty Publications

Mangroves sustain high soil accretion and carbon sequestration rates, yet it is still unknown if they can keep pace with increasing sea level rise (SLR) across a wider range of coastal geomorphic settings. Because accretion rates are controlled by mineral sediment inputs and organic matter accumulation, it is paramount to assess the relative contribution of root productivity to soil formation. Here, we evaluated root biomass, production, and turnover in three mangrove ecotypes to evaluate the role of soil nutrient limitation, stressors, and hydroperiod in controlling root dynamics in San Andres Island (SAI), a karstic oceanic island in the Caribbean Sea. …