Digital Commons Network^™

Phase Noise Analyses And Measurements In The Hybrid Memristor-Cmos Phase-Locked Loop Design And Devices Beyond Bulk Cmos, Naheem Olakunle Adesina

LSU Doctoral Dissertations

Phase-locked loop (PLLs) has been widely used in analog or mixed-signal integrated circuits. Since there is an increasing market for low noise and high speed devices, PLLs are being employed in communications. In this dissertation, we investigated phase noise, tuning range, jitter, and power performances in different architectures of PLL designs. More energy efficient devices such as memristor, graphene, transition metal di-chalcogenide (TMDC) materials and their respective transistors are introduced in the design phase-locked loop.

Subsequently, we modeled phase noise of a CMOS phase-locked loop from the superposition of noises from its building blocks which comprises of a voltage-controlled oscillator, …

Simulation And Visualization Tool For Short-Term Process Scheduling, Martin Ivanchev

Honors Capstones

No abstract provided.

Pocket2drug: An Encoder-Decoder Deep Neural Network For The Target-Based Drug Design, W T. Shi, M Singha, G Srivastava, L M. Pu, W T. Shi, M Brylinski

Faculty Publications

Computational modeling is an essential component of modern drug discovery. One of its most important applications is to select promising drug candidates for pharmacologically relevant target proteins. Because of continuing advances in structural biology, putative binding sites for small organic molecules are being discovered in numerous proteins linked to various diseases. These valuable data offer new opportunities to build efficient computational models predicting binding molecules for target sites through the application of data mining and machine learning. In particular, deep neural networks are powerful techniques capable of learning from complex data in order to make informed drug binding predictions. In …

Spectral Theorem Approach To The Characteristic Function Of Quantum Observables, Andreas Boukas

Journal of Stochastic Analysis

No abstract provided.

Examining Serial Position Effects In Individuals With And Without Mild Cognitive Impairment, Daniel Scott Weitzner

LSU Doctoral Dissertations

Serial position effects (SPEs) have shown to be sensitive predictors of future cognitive decline (Bruno et al., 2013) and conversion from mild cognitive impairment (MCI) to Alzheimer’s disease (AD; Egli et al., 2014), even when accounting for total learning and memory scores. However, conflicting results have been found in the literature, which may be at least partially related to the many ways in which SPEs have been calculated. The current study aimed to address the discrepancies in the literature by examining SPEs in participants with and without MCI.

86 participants (57 healthy comparison, 29 MCI) completed the California Verbal Learning …

Impact Of New Technologies On Weed Control In Louisiana Rice Production, David C. Walker

LSU Doctoral Dissertations

Field studies were conducted in 2018-2021 at the LSU Agricultural Center’s H.R. Caffey Rice Research Station (RRS) near Crowley, LA, and the Dean Lee Research and Extension Center (DLREC) near Alexandria, LA to evaluate off-target florpyrauxifen movement on soybean. Soybean was treated with florpyrauxifen at the V4-V5 or R1-R2 growth stages. Soybean injury was evaluated at 1, 7, 14, and 28 days after treatment (DAT) and soybean plant height (cm) was recorded at 7, 14, and 28 DAT. At soybean maturity, yield and individual yield components were subjected to regression analysis to describe the relationship between florpyrauxifen rate and soybean …

Applying Transformative Evaluation To Assess Service Provided To African Americans Through The Snap-Ed Program, Matthew Greene

LSU Doctoral Dissertations

Obesity and food insecurity are disproportionately experienced by African Americans compared to white Americans. African Americans encounter multiple barriers to healthful eating in their food environment, in part due to structural racism. Four studies were undertaken to understand how SNAP-Ed may best address the needs of African Americans and whether the program is serving African Americans in Louisiana equitably. In the first study, a scoping review was conducted to describe nutrition interventions addressing structural racism experienced by African Americans and compare them to the Getting to Equity in Obesity Prevention Framework. Nearly all included studies focused on PSE change interventions …

Electro-Acupuncture (Ea) System Having A Wearable Electro-Acupuncture Neurostimulator For Enhanced Clinical And Scientific Outcomes, And A Method, Jin-Woo Choi, Jose Aquiles Parodi Amaya, Ronald Koh

Pennington Biomedical Research Center Patents

An electro-acupuncture (EA) system and method for performing EA on a patient are provided. The EA system comprises a wearable neurostimulator device, at least a first pair of electrically-conductive acupuncture needles and a system controller. The wearable neurostimulator device comprises a casing, an EA circuit mechanically coupled to the casing, and an attachment device mechanically coupled to the casing and adapted to removably secure the wearable neurostimulator device to the patient. The first pair of electrically-conductive acupuncture needles is mechanically coupled to the casing and electrically coupled to the EA circuit. The system controller is in communication with the EA …

Multi-Year Data Analysis And Genomic Selection To Improve The Efficiency Of A Rice Breeding Program, Tommaso Cerioli

LSU Doctoral Dissertations

Plant breeding dramatically improved crops performances during human history and will play a pivotal role in shaping the future of agriculture. However, this activity requires large amount of time and resources. The availability of multi-year datasets and abundant DNA information enables new analyses and breeding approaches that can increase the productivity and efficiency of a breeding program. In recent years, the LSU Rice Breeding Program has implemented marker assisted selection (MAS) and genomic selection (GS) to predict performance of rice genotypes before field testing. The goal of this project was to conduct analyses and test molecular approaches to increase the …

Digital Discrimination In The Sharing Economy: Evidence, Policy, And Feature Analysis, Miroslav Tushev

LSU Doctoral Dissertations

Applications (apps) of the Digital Sharing Economy (DSE), such as Uber, Airbnb, and TaskRabbit, have become a main facilitator of economic growth and shared prosperity in modern-day societies. However, recent research has revealed that the participation of minority groups in DSE activities is often hindered by different forms of bias and discrimination. Evidence of such behavior has been documented across almost all domains of DSE, including ridesharing, lodging, and freelancing. However, little is known about the under- lying design decisions of DSE systems which allow certain demographics of the market to gain unfair advantage over others. To bridge this knowledge …

Construction Of The Canonical Representation From A Noncanonical Representation, Yuji Hibino

Journal of Stochastic Analysis

No abstract provided.

Evaluation Of Hippocampal Allostatic Load-Associated Factors In Animal Models Of Post-Traumatic Stress Disorder: Relevance To Human Ptsd, Dennis Parker Kelley

LSU Doctoral Dissertations

Post-traumatic stress disorder (PTSD) is associated with elevated allostatic load, nearly double the risk for metabolic syndrome, reduced hippocampal volume, and contextual memory processing deficits. Emerging evidence suggests that these stress effects may predispose individuals to the development of PTSD, and there is a known relationship between chronic stress and metabolic dysfunction. In this work, we utilized two rat models of PTSD to explore these connections. We used an acute predator odor stressor to investigate the relationship between PTSD-like behaviors and mitochondrial dysfunction in the hippocampus of rats, and we observed that conditioned place avoidance was associated with reduced mitochondrial …

90snet:, Seth Richard

Honors Capstones

No abstract provided.

Bela Real Estate Company, Dallin G. Broussard

Honors Capstones

No abstract provided.

Child-Oriented Word Associations Improve Models Of Early Word Learning, C R. Cox, E Haebig

Faculty Publications

How words are associated within the linguistic environment conveys semantic content; however, different contexts induce different linguistic patterns. For instance, it is well known that adults speak differently to children than to other adults. We present results from a new word association study in which adult participants were instructed to produce either unconstrained or child-oriented responses to each cue, where cues included 672 nouns, verbs, adjectives, and other word forms from the McArthur-Bates Communicative Development Inventory (CDI; Fenson et al., 2006). Child-oriented responses consisted of higher frequency words with fewer letters, earlier ages of acquisition, and higher contextual diversity. Furthermore, …

A Comparison Of Hay And Fish Emulsion-Infused Water As Oviposition Attractants For The Cdc Gravid Trap, Timothy D. Mcnamara, Kristen Healy

Faculty Publications

Multiple oviposition attractants are used for Culex (Diptera: Culicidae) mosquito surveillance in the CDC Gravid Trap, including hay and fish emulsion-infused water. Despite the use of both in the United States, no research has compared their attractiveness. We conducted trapping throughout Louisiana to assess the attractiveness of hay and fish emulsion-infused water in various habitat types and climates. Our results indicate that fish emulsion-infused water attracts more mosquitoes overall, more Culex quinquefasciatus (Say, 1823), and a wider diversity of mosquitoes than hay-infused water. This trend was maintained, regardless of habitat type or climate.

“It Just Seems Like People Are Talking About Menopause, But Nobody Has A Solution”: A Qualitative Exploration Of Menopause Experiences And Preferences For Weight Management Among Black Women, Chelsea L. Kracht, Jessica St Romain, Julie C. Hardee, Nanette Santoro, Leanne M. Redman, Kara L. Marlatt

Clinical Research Faculty Publications

Objectives: A qualitative study was performed to characterize experiences of women going through menopause, as well as to identify barriers and facilitators for participating in a lifestyle program targeting weight management during menopause. Study Design: Perimenopausal and postmenopausal Black women with a self-reported desire to lose or maintain weight during menopause participated in a total of six focus groups. Main Outcome Measures: Women were asked about their past experiences with diet, exercise, and weight management; their menopause experiences; as well as specific components and considerations for developing a lifestyle program for weight management. Thematic analysis was conducted on coded transcripts …

Decreasing Phosphorus Fertility To Reduce Sweet Potato Root Growth During Container-Grown Transplant Production, L. Rouse, J. Beasley, D. Labonte, J. Kuehny

Faculty Publications

Sweetpotato [Ipomoea batatas (L.) Lam.], grown as an edible ornamental, is propagated in home gardens using locally purchased transplants. However, vigorous growth of sweetpotato limits the period of transplant salability due to root confinement. The objective of the experiment was to evaluate reductions in phosphorus (P) fertility to slow transplant root growth and extend the period of salability. Cuttings were planted into containers and fertilized at 0, 5 (0.0007), 10 (0.0012), 15 (0.0020), 20 (0.0024), and 31 mg P.L-1 (0.0040 oz P.gal-1) using a modified Hoagland solution. All transplants fertilized at 5 mg P.L-1 increased in shoot length, color, and …

Daily Steps And All-Cause Mortality: A Meta-Analysis Of 15 International Cohorts, Amanda E. Paluch, Shivangi Bajpai, David R. Bassett, Mercedes R. Carnethon, Ulf Ekelund, Kelly R. Evenson, Deborah A. Galuska, Barbara J. Jefferis, William E. Kraus, I. Min Lee, Charles E. Matthews, John D. Omura, Alpa V. Patel, Carl F. Pieper, Erika Rees-Punia, Dhayana Dallmeier, Jochen Klenk, Peter H. Whincup, Erin E. Dooley, Kelley Pettee Gabriel, Priya Palta, Lisa A. Pompeii, Ariel Chernofsky, Martin G. Larson, Ramachandran S. Vasan, Nicole Spartano, Marcel Ballin, Peter Nordström, Anna Nordström, Sigmund A. Anderssen, Bjørge H. Hansen, Jennifer A. Cochrane, Terence Dwyer, Jing Wang

Population and Public Health Science Faculty Publications

Background: Although 10 000 steps per day is widely promoted to have health benefits, there is little evidence to support this recommendation. We aimed to determine the association between number of steps per day and stepping rate with all-cause mortality. Methods: In this meta-analysis, we identified studies investigating the effect of daily step count on all-cause mortality in adults (aged ≥18 years), via a previously published systematic review and expert knowledge of the field. We asked participating study investigators to process their participant-level data following a standardised protocol. The primary outcome was all-cause mortality collected from death certificates and country …

Post-Acute Sequelae Of Covid-19: A Metabolic Perspective, Philipp E. Scherer, John P. Kirwan, Clifford J. Rosen

Division of Basic Science Faculty Publications

The SARS-CoV-2 pandemic continues to rage around the world. At the same time, despite strong public health measures and high vaccination rates in some countries, a post-COVID-19 syndrome has emerged which lacks a clear definition, prevalence, or etiology. However, fatigue, dyspnea, brain fog, and lack of smell and/or taste are often characteristic of patients with this syndrome. These are evident more than a month after infection, and are labeled as Post-Acute Sequelae of CoV-2 (PASC) or commonly referred to as long-COVID. Metabolic dysfunction (i.e., obesity, insulin resistance, and diabetes mellitus) is a predisposing risk factor for severe acute COVID-19, and …

Topological Edge States At Singular Points In Non-Hermitian Plasmonic Systems, Yin Huang, Yuecheng Shen, Georgios Veronis

Faculty Publications

We introduce non-Hermitian plasmonic waveguide-cavity systems with topological edge states (TESs) at singular points. The compound unit cells of the structures consist of metal-dielectric-metal (MDM) stub resonators side-coupled to an MDM waveguide. We show that we can realize both a TES and an exceptional point at the same frequency when a proper amount of loss is introduced into a finite three-unit-cell structure. We also show that the finite structure can exhibit both a TES and a spectral singularity when a proper amount of gain is introduced into the structure. In addition, we show that we can simultaneously realize a unidirectional …

Event-Triggered Control For Linear Time-Varying Systems Using A Positive Systems Approach, Frederic Mazenc, Michael Malisoff, Corina Barbalata, Zhong Ping Jiang

Faculty Publications

This paper presents a new design for the event-triggered output feedback control of uncertain linear time-varying systems. Departing from the traditional treatments of event-triggered linear time-invariant systems, it is shown that factoring of fundamental solutions as products of solutions of matrix differential equations, together with small-gain arguments and the notions of interval observers and positive systems, lead to a new class of robust event-triggered output-feedback controllers. A key innovation is our use of new event triggers, which use vectors of absolute values instead of the usual Euclidean 2-norms. An illustrative example of a curve tracking system from marine robotics validates …

Viscosity Of Fe-Ni-C Liquids Up To Core Pressures And Implications For Dynamics Of Planetary Cores, Feng Zhu, Xiaojing Lai, Jianwei Wang, Quentin Williams, Jiachao Liu, Yoshio Kono, Bin Chen

Faculty Publications

The viscosity of iron alloy liquids is the key for the core dynamo and core-mantle differentiation of terrestrial bodies. Here we measured the viscosity of Fe-Ni-C liquids up to 7 GPa using the floating sphere viscometry method and up to 330 GPa using first-principles calculations. We found a viscosity increase at ∼3–5 GPa, coincident with a structural transition in the liquids. After the transition, the viscosity reaches ∼14–27 mPa·s, a factor of 2–4 higher than that of Fe and Fe-S liquids. Our computational results from 5 to 330 GPa also indicate a high viscosity of the Fe-Ni-C liquids. For a …

My Favorite Murder As Discursive Performance, Taylor Dawson

LSU Doctoral Dissertations

My Favorite Murder as Discursive Performance uses performance-centered discourse analysis to explore the major narratives informing the popular true crime comedy podcast, My Favorite Murder (MFM). Hosts, Karen and Georgia draw from podcast, comedy, true crime, feminist, and mental health discourse to create a unique discursive space where “murderinos” (fans of the podcast) express and explore aspects of their own life experiences. I explore the performative strategies MFM uses and the effects of those choices, drawing on some of my own experiences as a murderino. Ultimately I argue that a performance lens reveals some of the imperfect but powerful ways …

Three Essays On Behaviors In Crowdsourcing Communities, Ali Simaei Gargari

LSU Doctoral Dissertations

Over the last decade, the interest in studying crowdsourcing platforms has dramatically increased among researchers in the information systems (IS) area. My dissertation includes three essays on crowdsourcing. The first essay provides an extensive literature review on crowdsourcing and shows several gaps in the literature. The second essay highlights the gaps in the literature on innovation contest platforms and draws on the organizational learning literature to fill the gaps. In this research, I draw on the organizational learning literature to study the undelying dynamics of specialization and variation in innovation contest platforms. Using data of nearly 35000 users' participation history …

New Limit Theorems For Increments Of Birth-And-Death Processes With Linear Rates, Alexander Ya. Kreinin, Vladimir V. Vinogradov

Journal of Stochastic Analysis

No abstract provided.

Backward Stochastic Differential Equations With No Driving Martingale And Pseudo-Pdes, Adrien Barrasso, Francesco Russo

Journal of Stochastic Analysis

No abstract provided.

Exploring The Effects Of Genetic Variation On Gene Regulation In Cancer In The Context Of 3d Genome Structure, N Osman, A M. Shawky, M Brylinski

Faculty Publications

Background Numerous genome-wide association studies (GWAS) conducted to date revealed genetic variants associated with various diseases, including breast and prostate cancers. Despite the availability of these large-scale data, relatively few variants have been functionally characterized, mainly because the majority of single-nucleotide polymorphisms (SNPs) map to the non-coding regions of the human genome. The functional characterization of these non-coding variants and the identification of their target genes remain challenging. Results In this communication, we explore the potential functional mechanisms of non-coding SNPs by integrating GWAS with the high-resolution chromosome conformation capture (Hi-C) data for breast and prostate cancers. We show that …

Social Media: Good Or Evil?, Prosanta Chakrabarty

Faculty Publications

No abstract provided.

Caregiver Treatment Consumption In An Experimental Treatment Marketplace, Delaney J. Darragh

LSU Master's Theses

Behavioral economics is an approach to understanding consumer behavior by integrating behavioral science with economic principles. Behavioral economics incorporates traditional economic principles with operant learning approaches. There is limited research examining how individuals consume psychological and behavioral treatments. This is especially the case for treatments designed for children. The current study used data from a previously collected sample to explore gender differences in an experimental treatment marketplace (ETM). Experimental treatment marketplaces are generally used to evaluate choices between goods and services (e.g., types of behavior interventions). An ETM was developed to evaluate treatment consumption when levels of evidence differed between …