Digital Commons Network^™

A Narrative Case Study Examining The Influences Of Peer-Led Team Learning On Student Critical Thinking Skill Acquisition And Deeper Process Content Knowledge In A Midsize Texas University Humanities And Social Sciences Program, Daniel E. Pratt

LSU New Orleans Theses and Dissertations

This dissertation will examine the efficacy of peer-led team learning (PLTL) in a humanities and social sciences program, at a midsize Texas university. It will be conducted exclusively within the College of Humanities and Social Sciences (CHSS), and the academic subjects to be evaluated include English, history, and philosophy. Its primary function is to disclose whether or not PLTL facilitates in student participants improvement in critical thinking skill acquisition and deeper process content knowledge. Of primary interest in this qualitative, narrative case study is deducing how breakout sessions – supplementary meetings led by student participants, in the absence of instructors, …

Investigation Of 2195 And 2219 Post Weld Heat Treatments For Additive Friction Stir Lap Welds, Matthew Champagne

LSU New Orleans Theses and Dissertations

To evaluate potential uses for friction stir welding in additive manufacturing, two separate parts were fabricated, one of 2195-T84 and the other 2219-T87, utilizing fixed pin techniques and additive lap welds. The parts were cut into samples, artificially aged and subjected to Rockwell hardness (HRB), Vickers hardness, micrographic photography, and metallographic imaging on both pre- and post- heat treatment. Additionally, tensile testing was performed on the heat-treated samples. A comparisons of test results showed a minimal increase in the yield strength of the 2195-T84 samples compared to as-welded tensile results obtained from a previous project. The ultimate tensile strength was …

Fabrication And Characterization Of Intricate Nanostructures, Treva T. Brown

LSU New Orleans Theses and Dissertations

Encapsulation of nanoparticles within hexaniobate nanoscrolls presents interesting advances in the formation of nanocomposites exhibiting unique multi-dimensional properties. Building upon previous successes, facile yet versatile wet-chemical and microwave-irradiation synthetic protocols for the fabrication of a series of hexaniobate composites are presented herein. Solvothermal and, more recently, microwave-assisted methods have been developed that allow for the fabrication of peapod-like structures. During solvothermal treatment, exfoliated hexaniobate nanosheets scroll around highly ordered chains of preformed nanoparticles (NPs) to produce nanopeapods (NPPs). This approach offers versatility and high yields, in addition to the potential for advanced functional device fabrication.

For the characterization of these …

Underwater Acoustic Signal Analysis Toolkit, Kirk Bienvenu Jr

LSU New Orleans Theses and Dissertations

This project started early in the summer of 2016 when it became evident there was a need for an effective and efficient signal analysis toolkit for the Littoral Acoustic Demonstration Center Gulf Ecological Monitoring and Modeling (LADC-GEMM) Research Consortium. LADC-GEMM collected underwater acoustic data in the northern Gulf of Mexico during the summer of 2015 using Environmental Acoustic Recording Systems (EARS) buoys. Much of the visualization of data was handled through short scripts and executed through terminal commands, each time requiring the data to be loaded into memory and parameters to be fed through arguments. The vision was to develop …

There Will Be Time, Sherng-Lee Huang

LSU New Orleans Theses and Dissertations

N/A

Conflict, Constraint, And The Evolution Of The Multivariate Performance Phenotype, Ann M. Cespedes Phd

LSU New Orleans Theses and Dissertations

Performance is key to survival. From day-to-day foraging events, to reproductive activities, to life-or-death crises, how well an organism performs these tasks can determine success or failure. Selection, therefore, both natural and sexual, act upon performance, and performance demands on individuals shape a population’s morphological and physiological trait distributions. While studies of morphological adaptations to ecological pressures implicitly center on the idea that responses to selection improve performance via changes in morphology, the relationships between morphology, performance, and fitness are not always well understood. In this dissertation, I investigate these relationships explicitly, as well as determine the effects that different …

Meno And Euphrates Elementary: Episodes 1 & 2, Thad F. Lee

LSU New Orleans Theses and Dissertations

No abstract provided.

Automated Species Classification Methods For Passive Acoustic Monitoring Of Beaked Whales, John Lebien

LSU New Orleans Theses and Dissertations

The Littoral Acoustic Demonstration Center has collected passive acoustic monitoring data in the northern Gulf of Mexico since 2001. Recordings were made in 2007 near the Deepwater Horizon oil spill that provide a baseline for an extensive study of regional marine mammal populations in response to the disaster. Animal density estimates can be derived from detections of echolocation signals in the acoustic data. Beaked whales are of particular interest as they remain one of the least understood groups of marine mammals, and relatively few abundance estimates exist. Efficient methods for classifying detected echolocation transients are essential for mining long-term passive …

Boiltown, Eric Layer

LSU New Orleans Theses and Dissertations

No abstract provided.

Frameworks Of Recovery: Exploring The Intersection Of Policy & Decision-Making Processes After Hurricane Katrina, Kim Mosby

LSU New Orleans Theses and Dissertations

This study seeks to understand how local and national newspaper articles and African American residents frame obstacles to returning to New Orleans after Hurricane Katrina. It explores how recovery planning processes and policy changes influenced the decision-making processes of African Americans displaced to Houston through a content analysis of the media and qualitative interviews with displaced and returned residents. The study shows the media and participants framed disaster recovery policies as creating opportunities and gaps in assistance that varied by location. Participants described how policy decisions that created gaps in assistance compounded the difficulty of returning for working- and middle-class …

Hydrodynamic Controls On The Morphodynamic Evolution Of Subaqueous Landforms, Timothy L. Nelson

LSU New Orleans Theses and Dissertations

The southern Chandeleur Islands are an ideal setting to study shoal evolution given their history of submergence and re-emergence. Here, numerical models shed light on the attendant processes contributing to shoal recovery/reemergence following a destructive storm event. Simulations of a synthetic winter storm along a cross-shore profile using Xbeach shows that convergence of wave-induced sediment transport associated with repeated passage of cold-fronts initiates aggradation, but does not lead to reemergence. A Delft3d model of the entire island chain shows that as these landforms aggrade alongshore processes driven by incident wave refraction on the shoal platform, backbarrier circulation and resulting transport …

Late Bloomer, Allyson M. Nobles

LSU New Orleans Theses and Dissertations

No abstract provided.

Line Start Permanent Magnet Synchronous Motor For Multi Speed Application, Bikrant Poudel

LSU New Orleans Theses and Dissertations

This thesis aims to design and develop LSPM motors capable of operating in two distant synchronous speeds with good starting torque and steady state characteristics for variety of industrial applications, in particular offshore and maritime applications. The proposed designs are based on variable pole numbers for the stator and the rotor. The stator winding consist of two independent windings with different pole numbers to switch the winding and change the operating pole count for low and high speed applications. For the motor to operate in these two distinct operating speeds, the rotor must be capable of creating two different magnetic …

Design, Manufacture, And Structural Dynamic Analysis Of A Biomimetic Insect-Sized Wing For Micro Air Vehicles, Jose Enrique Rubio

LSU New Orleans Theses and Dissertations

The exceptional flying characteristics of airborne insects motivates the design of biomimetic wing structures that can exhibit a similar structural dynamic behavior. For this purpose, this investigation describes a method for both manufacturing a biomimetic insect-sized wing using the photolithography technique and analyzing its structural dynamic response. The geometry of a crane fly forewing (family Tipulidae) is acquired using a micro-computed tomography scanner. A computer-aided design model is generated from the measurements of the reconstructed scanned model of the insect wing to design the photomasks of the membrane and the venation network required for the photolithography procedure. A composite …

Mathematical Formulation Of Fusion Energy Magnetohydrodynamics, Nikolaos I. Xiros

LSU New Orleans Theses and Dissertations

Chapter 1 presents the basic principles of Controlled Thermonuclear Fusion, and the approaches to achieve nuclear fusion on Earth. Furthermore, the basic components of the Tokamak, the reactor which will house the fusion reaction, are analyzed. Finally, the chapter ends with a discussion on how the present thesis is related to the Controlled Thermonuclear Fusion. Chapter 2 introduces briefly the basic concepts of the Electromagnetic and Magnetohydrodynamic theories as well as MHD turbulence. Chapter 3 presents a first glance in OpenFOAM CFD library. Chapter 4 introduces the Orszag-Tang vortex flow, which is a benchmark test case for MHD numerical models. …

Parameter Estimation Technique For Models In Pss/E Using Real-Time Data And Automation, Malavika Vasudevan Menon

LSU New Orleans Theses and Dissertations

The purpose of this thesis is to use automation to create appropriate models in PSS/E with the data from Hardware-in-Loop real-time simulations. With the increase in technology of power electronics, the use of High Voltage Direct Current Technology and Flexible Alternating Current Transmission System devices in the electrical power system have increased tremendously. Static Var Compensators are widely used and it is important to have accurate and reliable models for studies relating to power systems planning and interaction. An automation method is proposed to find the parameters of an SVC model in PSS/E with the data from the Hardware-in- loop …

Teaching Organizational Leaders: Application Of Title Vii Of The Civil Rights Act Of 1964 To Hiring Practices And Harassment Prevention In New Orleans, Angela Glaviano

LSU New Orleans Theses and Dissertations

No abstract provided.

Three-Dimensional Nanomaterials For Supercapacitor Applications: From Metal Oxides To Metal Phosphides, Zhi Zheng

LSU New Orleans Theses and Dissertations

Over the past few years, energy storage devices have received tremendous interest due to the increasing demand for sustainable and renewable energy in modern society. Supercapacitors are considered as one of the most promising energy storage devices because of their high power density and long cycle life. However, low energy density remains as the main shortcoming for supercapacitors. The overall performance of supercapacitors is predominantly determined by the characteristics of the electrodes. Specifically, constructing nanostructured electrode material has been proven as an efficient way to improve the performance by providing large surface area and short ionic and electronic diffusion paths. …

Safeguarding For The Future: Managing Born-Digital Collections In Museums, Kimberly Kruse

Seton Hall University Dissertations and Theses (ETDs)

Over the past few decades, advancements in technology have changed society entirely. Every bit of information about world news, popular culture, and art is just a tap of a touchscreen away. So many aspects of the contemporary world have become digitized so that it was only a matter of time before museums would have to face the issue of born-digital media in their collections. From videos to web-based art, museums have to tackle how to save this new form of cultural heritage. Museums have to do so now before it gets lost forever. The challenge of born-digital objects lies in …

Flagship Constellations Mini-Conference Set For Jan. 19, Staff Report

University of Mississippi News

Registration is open for event focused on disaster resilience

Residents’ Perception Of Environmental Performance In New Urbanist Landscapes In North Texas: Learning From Addison Circle, Austin Ranch And Hometown, Riza Pradhan

Landscape Architecture Masters & Design Theses - Archive

New Urbanism movement has been shaping the cities and suburbs in increasing numbers in the US for more than three decades. The Congress for New Urbanism is promoting compact, mixed-use, interconnected, and walkable models for sustainable development. In recent years, the environmental implications of New Urbanism have not been sufficiently addressed in the literature (Spirn, 2000; Waldheim, 2010). However, the Charter of New Urbanism (Talen, 2013) highlights the importance and relevance of environmental factors. Overall, the literature lacks sufficient evidence about the environmental performance of the New Urbanist landscapes, specifically in the Dallas- Fort Worth (DFW) region. The purpose of …

Effect Of Cell Wall Destruction On Anaerobic Digestion Of Algal Biomass, Jessica R. Simpson

LSU New Orleans Theses and Dissertations

Research was conducted using algal biomass obtained from the surface of a secondary clarifier at Bridge City Wastewater Treatment Plant and subsequently sent through an electrochemical (EC) batch reactor at various concentrations. The first objective was to achieve maximum cell wall destruction electrochemically using the EC batch reactor and determine the optimal detention time and voltage/current relationship at which this occurred. The second objective was to subject two algal mediums to anaerobic digestion: the algal medium without electrochemical disinfection and the algal medium after disinfection. Every three days, for 12 days, total solids were measured from each apparatus to determine …

An Application Of M-Matrices To Preserve Bounded Positive Solutions To The Evolution Equations Of Biofilm Models, Richard S. Landry Jr.

LSU New Orleans Theses and Dissertations

In this work, we design a linear, two step implicit finite difference method to approximate the solutions of a biological system that describes the interaction between a microbial colony and a surrounding substrate. Three separate models are analyzed, all of which can be described as systems of partial differential equations (PDE)s with nonlinear diffusion and reaction, where the biological colony grows and decays based on the substrate bioavailability. The systems under investigation are all complex models describing the dynamics of biological films. In view of the difficulties to calculate analytical solutions of the models, we design here a numerical technique …

Ten Um Freshmen Named 2017 Stamps Scholars, Edwin B. Smith

University of Mississippi News

Students exemplify best of scholarship, community service and leadership

Harmonics Elimination In Three Phase Cascade H-Bridge Multilevel Inverter Using Virtual Stage Pwm, Amro Quedan

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

The multilevel inverters are one of the great solutions that are proposed to satisfy the demand for high-power application and the significant integration of renewable energy. The conversion process from DC to AC must be done at high efficiency to decrease the energy loss and to ensure the electric grid power quality. The Total Harmonic Distortion (THD) is the most important feature that indicates the efficiency of the conversion process. In this research, due to the advantages of the cascade H-bridge inverter over other topologies, it has been used with the virtual stage PWM technique to investigate two different methods …

The Analysis Of Asymmetric Micro Droplets, Benjamin Gaffney, Damena Agonafer

Mechanical Engineering and Materials Science Independent Study

The primary object of the research activities in this semester is to investigate how to adapt the Popov’s evaporation model to droplets with asymmetric geometries. Besides, extensive work with Surface Evolver were performed to analyze the equilibrium geometries of droplets on different solid substrate. Progress has been significant in the development of skills in Surface Evolver, specifically in investigating droplets at the point of bursting. Progress has been less significant in the adaptation of Popov’s Model as there are many aspects of this that require in-depth analysis, but the progress made has been promising. Outcomes of this semester include a …

Metallic Glass Composites-Understanding Nucleation And Growth, Ryogo Suzuki, Juan Wang, Anupriya Agrawal Dr., Katharine M. Flores Dr.

Mechanical Engineering and Materials Science Independent Study

No abstract provided.

Numerical And Experimental Study Of The Wetting Characteristics Of Water Droplets On Solid Substrates, Zichen Du, Damena Agonafer

Mechanical Engineering and Materials Science Independent Study

In this study, the author first reviewed the background and the mechanism of a highly efficient cooling method—i.e., the thin film evaporative cooling, in which the heat removal performance is highly dependent on the wetting characteristics of the working fluid. Then, the author studied the wetting behavior of water on different solid substrate both numerically and experimentally. By minimizing the free energy, Surface Evolver was used to explore the profile of the static liquid meniscus and the corresponding contact angle of water droplets on plain solid substrate and pillar substrate with sharp edge. Besides, goniometer experiments were performed to study …

Computational Fluid Dynamics Analysis Of High Lift, Single Element, Inverted Airfoils In Ground Effect For An Fsae Car Front Wing, Michael Grabis, Ramesh K. Agarwal

Mechanical Engineering and Materials Science Independent Study

No abstract provided.

Volume 55, Number 19: December 20, 2017, University Of North Dakota

University Letter Archive

No abstract provided.