Digital Commons Network^™

Cost Effective, Highly Efficient Wireless Power Transfer Systems For Ev Battery Charging, Amir Masoud Bozorgi

LSU Doctoral Dissertations

The impact of changing inner diameter of wireless power transfer (WPT) coils on coupling coefficient is studied. It is demonstrated that at a certain outer and inner coil diameter, turn space variation has minor effect on the coupling coefficient. Next, two compensation networks, namely primary LCC and secondary LCC, which offer load-independent voltage transfer ratio and zero voltage switching for WPT, are presented. For both compensation networks, the condition for having zero voltage switching operation are derived. In addition, load-independent voltage transfer ratio (VTR) frequencies are obtained and VTR at each frequency is derived. Then, required equations for calculation of …

Second Language Identities Of International Teaching Assistants In The U.S. Classroom, Adam Agostinelli

Faculty Publications

Sociolinguistic research has yet to comprehensively address changes in the second language mediated identity, or second language identity (L2I), of English as a second language (ESL) students that take place as a result of traveling abroad and experiencing English in authentic circumstances. First, this study provides an outline of L2I and proposes a framework for evaluating L2I in authentic contexts (i.e. in a country where the target language is the primary means of communication). Second, personal narratives, formal reports, and observed classroom comments of international graduate teaching assistants (ITAs), who were placed in a required English Speaking course as a …

Second Language Identities Of International Teaching Assistants In The U.S. Classroom, Adam Agostinelli

Faculty Publications

Sociolinguistic research has yet to comprehensively address changes in the second language mediated identity, or second language identity (L2I), of English as a second language (ESL) students that take place as a result of traveling abroad and experiencing English in authentic circumstances. First, this study provides an outline of L2I and proposes a framework for evaluating L2I in authentic contexts (i.e. in a country where the target language is the primary means of communication). Second, personal narratives, formal reports, and observed classroom comments of international graduate teaching assistants (ITAs), who were placed in a required English Speaking course as a …

Increasing C-Additive Processes, Nadjib Bouzar

Communications on Stochastic Analysis

No abstract provided.

A Limiting Process To Invert The Gauss-Radon Transform, Jeremy J. Becnel

Communications on Stochastic Analysis

No abstract provided.

Spectral Theorem Approach To The Characteristic Function Of Quantum Observables, Andreas Boukas, Philip J. Feinsilver

Communications on Stochastic Analysis

No abstract provided.

Broad-Scale Habitat Use By Fledgling Black-Capped Vireo, Marisa T. Martinez, Ashley M. Long, Heather A. Mathewson, Michael L. Morrison

Faculty Publications

Knowledge of avian habitat associations during the postfledging stage is lacking for most songbirds, which limits the ability to develop and implement management plans that address the full life cycle of birds. The Black-capped Vireo (Vireo atricapilla; hereafter vireo) is a Neotropical migratory songbird that breeds in early to mid-successional vegetation but has been documented using late-successional vegetation. We used data collected in 2013 and 2014 to determine the spatial distribution of vireo fledglings in relation to the availability of woodland cover in central Texas. We found that woodland cover was used less often than it was available in the …

Smoothing Parameters For Recursive Kernel Density Estimators Under Censoring, Yousri Slaoui

Communications on Stochastic Analysis

No abstract provided.

Strong Convergence Rate In Averaging Principle For The Heat Equation Driven By A General Stochastic Measure, Vadym Radchenko

Communications on Stochastic Analysis

No abstract provided.

Fairness-Aware Energy-Efficient Resource Allocation In D2d Communication Networks, Shengjie Guo, Xiangwei Zhou, Sa Xiao, Mingxuan Sun

Faculty Publications

In this paper, the energy efficiency in a cellular network with device-to-device communications is studied from user fairness perspective. A mixed-integer max-min optimization problem is formulated, in which both mode selection and resource allocation are considered. Since the optimal solution requires exhaustive search, which is NP-hard, two suboptimal methods are derived. First, a Lagrangian decomposition-based method is proposed to jointly solve subcarrier assignment and power allocation with integer constraint relaxation under different modes. To further reduce the computational complexity, a low-complexity decomposition (LCD) method is derived. A novel mode selection scheme, a subcarrier assignment scheme, a power allocation scheme, and …

Optimizing N-Tier Application Scalability In The Cloud: A Study Of Soft Resource Allocation, Qingyang Wang, Shungeng Zhang, Yasuhiko Kanemasa, Calton Pu, Balaji Palanisamy, Lilian Harada, Motoyuki Kawaba

Faculty Publications

An effective cloud computing environment requires both good performance and high efficiency of computing resources. Through extensive experiments using a representative n-tier benchmark application (Rice University Bulletin Board System (RUBBoS)), we show that the soft resource allocation (e.g., thread pool size and database connection pool size) in component servers has a significant impact on the overall system performance, especially at high system utilization scenarios. Concretely, the same software resource allocation can be a good setting in one hardware configuration and then becomes an either under-or over-allocation in a slightly different hardware configuration, causing a significant performance drop. We have also …

Characterizing Location-Based Mobile Tracking In Mobile Ad Networks, Boyang Hu, Qicheng Lin, Yao Zheng, Qiben Yan, Matthew Troglia, Qingyang Wang

Faculty Publications

Mobile apps nowadays are often packaged with third-party ad libraries to monetize user data. Many mobile ad networks exploit these mobile apps to extract sensitive real-Time geographical data about the users for location-based targeted advertising. However, the massive collection of sensitive information by the ad networks has raised serious privacy concerns. Unfortunately, the extent and granularity of private data collection of the location-based ad networks remain obscure. In this work, we present a mobile tracking measurement study to characterize the severity and significance of location-based private data collection in mobile ad networks, by using an automated fine-grained data collection instrument …

Computational Feasibility Of Simulating Whole-Organ Vascular Networks And Their Response To Injury, William Patrick Donahue

LSU Doctoral Dissertations

Healthy vasculature is critical to sustaining the function of normal tissues in the human body. Radiation therapy for cancer causes injury of the vasculature of non-cancerous tissues. These changes have been associated with potentially deadly conditions such as necrosis of the brain tissue. There are currently no computational methods to study the effects of radiation vascular injury in whole-organ vasculatures because of the large number of vessels involved. The goal of this work was to test the feasibility of simulating radiation damage to whole-brain vascular networks and calculate the resulting change in blood flow. To accomplish this, we developed algorithms …

“I Need To Believe That Something Extraordinary Is Possible”: Effects Of Transcendent Media Experiences On The Destigmatization Of Mental Illness, Stephanie Whitenack

LSU Doctoral Dissertations

Entertainment psychology is moving toward an area of study where being entertained means experiencing pleasure and/or satisfying fundamental, meaningful needs as human beings (Vorderer, 2011). Now, scholars are examining meaningful media experiences and a recent subset known as transcendent media experiences. Transcendent media experiences are defined as experiences that elicit mixed affective states that can heighten feelings of elevation, compassion, and connectedness that lead to more prosocial motivations. These subjective experiences of meaningfulness can inspire universality by cultivating desires to overcome intergroup hostility (Oliver et al., 2018).

Much is known about the cognitive processes that contribute to lessening social distance …

Time In Giorgio De Chirico's Metaphysical Paintings, Ge Chen

LSU Master's Theses

Abstract

A subtle transformation in the fundamental cognition of a generation could trigger overwhelming ripples throughout the society. Time as an essential concept went through tempestuous changes in late nineteenth-century Europe because of the revolutionary development in railway system. Art world in cross-century Europe also witnessed unprecedented upheavals. Founder of Metaphysical Painting, Giorgio de Chirico was born to that age and was renowned for his complicated opinion towards modernism. This thesis intends to present how the change in the basic perception of time permeated the society, influenced ways of production, inspired art movements, and got reflected in art works.

Railway …

Measurement Of Visual Cues And Their Effects On Online Users: An Image Mining Approach, Shuya Lu

LSU Doctoral Dissertations

Textual marketing communication is effective in various contexts such as print advertising, user-generated content, and social media (Diamond 1968; Ludwig et al. 2013; Nam and Kannan 2014). However, visual marketing communication studies are limited in the context of print advertising (e.g., Hagtvedt and Brasel 2017). This dissertation includes two essays to examine the visual communication effectiveness online.

Essay 1 develops a conceptual framework to examine the visual-based brand perception (VBBP) and related concepts on social media. We propose that the VBBP is a co-creational process between a company and its consumers and exhibits three characteristics: i) a two-way communication that …

Beyond The Transcript: A Narrative Analysis Of Students' Experiences With Academic Dismissal In A Baccalaureate Nursing Program, Angela Edwards Capello

LSU Doctoral Dissertations

ABSTRACT

Re-defining different is the first step in addressing inequity in nursing education and the disparities that result in a high incidence of academic dismissal in baccalaureate nursing programs. What are the students' differences that contribute to one student’s ease of progression through a baccalaureate nursing program and those who struggle from the first semester?

This study provides a private look into the experiences of nine baccalaureate nursing students who were academically dismissed from their nursing program. Each story chronological from the time they decided to pursue nursing to their experiences during nursing school and to their lives after dismissal. …

Effective Use Of Systems Beyond The Firm’S Control: The Case Of Online Review Systems, Biagio Palese

LSU Doctoral Dissertations

The world is changing, and companies are becoming more exposed to systems beyond their control (e.g., online review systems, social media, shopping comparisons websites). We define systems beyond the firm’s control as any information systems neither designed nor commissioned by a company, that the firm must use to compete. Despite their importance and increasing prevalence these types of systems are surprisingly understudied in Information Systems. We focus our attention on the effective use of a specific class of systems beyond the firm’s control: online review systems. Online reviews are virtualized and broadcasted customer service systems that affect customers’ decisions. Companies …

The Effects Of Collaboration On Harmonization In College Group Piano, Yining Li

LSU Doctoral Dissertations

Current university-level group piano classes may not provide adequate training on functional keyboard skills needed by non-keyboard professional musicians. Innovative teaching strategies involving collaborative learning have been successfully demonstrated in other areas of education (e.g., math, science, and English) and might efficiently improve students’ functional keyboard skills. This dissertation examined the effects of collaborative learning on harmonization in college group piano classes. This study explored the differences between performance outcomes among students who collaborated to learn harmonization, as opposed to those who worked alone. It also investigated how collaborative work influenced students’ attitudes and confidence toward learning and performing harmonization. …

Designing And Composing For Interdependent Collaborative Performance With Physics-Based Virtual Instruments, Eric Sheffield

LSU Doctoral Dissertations

Interdependent collaboration is a system of live musical performance in which performers can directly manipulate each other’s musical outcomes. While most collaborative musical systems implement electronic communication channels between players that allow for parameter mappings, remote transmissions of actions and intentions, or exchanges of musical fragments, they interrupt the energy continuum between gesture and sound, breaking our cognitive representation of gesture to sound dynamics.

Physics-based virtual instruments allow for acoustically and physically plausible behaviors that are related to (and can be extended beyond) our experience of the physical world. They inherently maintain and respect a representation of the gesture to …

Voices From Within: Teacher Sensitivity In An Early Childhood Elementary School, Anjenette Victoria Holmes

LSU Doctoral Dissertations

Using a qualitative case study approach, grounded in an ecological systems theory framework, this project sought to understand how a teacher describes her journey of becoming sensitive and uncover what helps or hinders a teacher’s ability to sensitive. This study collected and examined data from multiple data sources, which included direct and participant observations, collected documents and artifacts, semi-formal and informal interviews with school members, along with a focus-group. Data was evaluated for common codes and relevant emerging themes are discussed. Six early childhood teachers at an early childhood elementary school participated in the study. Results suggest that there are …

Mobile Music Development Tools For Creative Coders, Daniel Stuart Holmes

LSU Doctoral Dissertations

This project is a body of work that facilitates the creation of musical mobile artworks. The project includes a code toolkit that enhances and simplifies the development of mobile music iOS applications, a flexible notation system designed for mobile musical interactions, and example apps and scored compositions to demonstrate the toolkit and notation system.

The code library is designed to simplify the technical aspect of user-centered design and development with a more direct connection between concept and deliverable. This sim- plification addresses learning problems (such as motivation, self-efficacy, and self-perceived understanding) by bridging the gap between idea and functional prototype …

Geometric Problems In Robot Exploration, Wyatt Preston Clements

LSU Doctoral Dissertations

Robots are increasingly utilized to perform tasks in today's world. This has varied from vacuuming to building advanced structures. With robots being used for tasks such as these, new challenges are introduced. Problems that have been previously researched to be performed, either theoretically or implemented, need to be redesigned to be able to better handle these challenges. In this thesis, I will discuss multiple problems that have previously been researched and I have redesigned to be possible to be implemented by robots or that I have developed a new way for the robots to solve the problem. I focus on …

Music Reading For Everybody: Notation For Laptop Music Making, Kathleen Alyse Winn

LSU Doctoral Dissertations

The purpose of this dissertation is to document the creation of a new music notation called KeyMusic for the ASCII/QWERTY keyboard on any computer platform. This notation is designed to enable those without musical training the ability to participate in music making. Creation of the notation is traced from its conception to the application of HCI (Human Computer Interaction) usability criteria to establish its efficacy for users. All of the pieces notated in this format so far, are transcriptions from traditional folk song and arrangements of classical melodies. The development of a chromatic, polytonal, multitimbral laptop instrument which is designed …

Multiformat Communication Strategies: A Conceptual Framework And Empirical Investigation Of Video Formats, Jordan Worth Moffett

LSU Doctoral Dissertations

Essay One was conducted to build a more complete view of bilateral, multiformat customer–firm communication. A review of communication theory builds a foundation for effective multiformat strategies across different exchange contexts (e.g., message complexity) and timing factors (e.g., relationship duration), while accounting for both positive and negative aspects of communication richness. Four perspectives on multiformat communication during exchange events suggest pertinent propositions and produce three parsimonious tenets. First, the authors propose a communication theory foundation for relationship marketing; second, they compile and synthesize extant research. Third, they identify six fundamental communication characteristics associated with different formats. Finally, they integrate insights …

Photo-Physical Properties Of Novel Gumbos For Optoelectronic Applications, Thenahandi Prasanthi Deepthika De Silva

LSU Doctoral Dissertations

Organic Light Emitting Diodes (OLEDs) are predicted to revolutionize next generation consumer electronics by offering many advantageous device characteristics, including low power consumption, low heat dissipation, a tunable and wider color gamut, high resolution and contrast, light weight, flexibility, and semi-transparency. However, a major limiting factor for OLEDs to reach their full potential is that only a few known blue OLED emitters with substantial spectral purity and longevity are available to date. Therefore, focus of this research is on understanding and addressing limitations of OLED emitters, with an emphasis on improving the characteristics of blue emitters.

The work presented in …

Role Of Tidal Wetland Stability In Lateral Fluxes Of Particulate Organic Matter And Carbon, Neil K. Ganju, Zafer Defne, Tracy Elsey‐Quirk, Julia M. Moriarty

Faculty Publications

No abstract provided.

All-Sky Search For Long-Duration Gravitational-Wave Transients In The Second Advanced Ligo Observing Run, B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C. Adams, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, S. Anand, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda, M. Arène

Faculty Publications

We present the results of a search for long-duration gravitational-wave transients in the data from the Advanced LIGO second observation run; we search for gravitational-wave transients of 2-500 s duration in the 24-2048 Hz frequency band with minimal assumptions about signal properties such as waveform morphologies, polarization, sky location or time of occurrence. Signal families covered by these search algorithms include fallback accretion onto neutron stars, broadband chirps from innermost stable circular orbit waves around rotating black holes, eccentric inspiral-merger-ringdown compact binary coalescence waveforms, and other models. The second observation run totals about 118.3 days of coincident data between November …

Physiological Characterization Of Inward Rectifier Potassium (Kir) Channels In Insect Neural Systems, Rui Chen

LSU Master's Theses

A complete understanding of the physiological pathways critical for proper function of the insect nervous system is still lacking. The recent development of potent and selective small-molecule modulators of insect inward rectifier potassium channels has enabled the interrogation of the physiological role and toxicological potential of Kir channels within various insect tissue systems. Therefore, we aimed to highlight the physiological and functional role of neural Kir channels in the central nervous system, muscular system, and neuromuscular system through pharmacological and genetic manipulations. Our data provide significant evidence that Drosophila neural systems rely on the inward conductance of K+ ions for …

An Introduction To Hpxmp – A Modern Openmp Implementation Leveraging Hpx, An Asynchronous Many-Task System, Tianyi Zhang, R. Tohid, Shahrzad Shirzad, Weile Wei, Patrick Diehl, Hartmut Kaiser

Faculty Publications

Asynchronous Many-task (AMT) runtime systems have gained increasing acceptance in the HPC community due to the performance improvements offered by fine-grained tasking runtime systems. At the same time, C++ standardization efforts are focused on creating higher-level interfaces able to replace OpenMP or OpenACC in modern C++ codes. These higher level functions have been adopted in standards conforming runtime systems such as HPX, giving users the ability to simply utilize fork-join parallelism in their own codes. Despite innovations in runtime systems and standardization efforts users face enormous challenges porting legacy applications. Not only must users port their own codes, but often …