Digital Commons Network^™

An Investigation To Determine Influences On Teachers In Indiana School Districts, Elizabeth K. Johns

All-Inclusive List of Electronic Theses and Dissertations

The purpose of this quantitative study was to determine the influences on teachers, as related to instruction, classroom management, professionalism, and attitude, while considering stage of teaching career, teaching level, and the demographic groups of gender and ethnicity. An analysis was conducted to determine the greatest influences on teachers in the areas of instruction, classroom management, professionalism, and attitude. Additional analysis was conducted to examine if significant differences existed when considering career stage, teaching level, gender, and ethnicity. An analysis was also conducted to test for significant interactions between the main effects of career stage and teaching level for each …

Combined Effects Of Co2 And Light On Large And Small Isolates Of The Unicellular N2-Fixing Cyanobacterium Crocosphaera Watsonii From The Western Tropical Atlantic Ocean, Nathan S. Garcia, Fei-Xue Fu, Cynthia L. Breene, Elizabeth K. Yu, Peter W. Bernhardt, Margaret R. Mulholland, David A. Hutchins

OES Faculty Publications

We examined the combined effects of light and pCO₂ on growth, CO₂-fixation and N₂-fixation rates by strains of the unicellular marine N₂-fixing cyanobacterium Crocosphaera watsonii with small (WH0401) and large (WH0402) cells that were isolated from the western tropical Atlantic Ocean. In low-pCO₂-acclimated cultures (190ppm) of WH0401, growth, CO₂-fixation and N₂-fixation rates were significantly lower than those in cultures acclimated to higher (present-day approximate to 385ppm, or future approximate to 750ppm) pCO² treatments. Growth rates were not significantly different, however, in low-pCO₂-acclimated cultures of …

Feasibility Study Of Residential Grid-Connected Solar Photovoltaic Systems In The State Of Indiana, Mahmoud Al-Odeh

All-Inclusive List of Electronic Theses and Dissertations

This study aims to measure the financial viability of installing and using a residential grid-connected PV system in the State of Indiana while predicting its performance in eighteen geographical locations within the state over the system's expected lifetime. The null hypothesis of the study is that installing a PV system for a single family residence in the State of Indiana will not pay for itself within 25 years. Using a systematic approach consisting of six steps, data regarding the use of renewable energy in the State of Indiana was collected from the website of the US Department of Energy to …

Diurnal And Nocturnal Avian Antipredator Behavior In Thermally Challenging Conditions, Jennie M. Carr

All-Inclusive List of Electronic Theses and Dissertations

Diurnal avian antipredator behavior has been the focus of much past research, yet the influence of the thermal environment on such behaviors is often overlooked. Far less is known about nocturnal avian antipredator behavior, including how these behaviors are influenced by challenging thermal environments. The first portion of my research focused on how the thermal environment influences the diurnal antipredator behavior of wintering birds while (i) exposed to high wind speeds, (ii) foraging in sunlit and shaded microhabitats, and (iii) when using thermoregulatory postures to conserve body heat. In addition to increasing convective heat loss, high wind speeds increase the …

Bringing Nature To Light: Schelling’S Naturphilosophie In The Early System Of Identity, Michael Vater

Philosophy Faculty Research and Publications

No abstract provided.

School Factors Related To Reading Achievement In Rural Schools With And Without High Poverty, Seth W. Miller

All-Inclusive List of Electronic Theses and Dissertations

This quantitative study identified how rural schools differ on five school-level factors related to student achievement according to their performance on Grade 3 reading. Through use of a MANOVA test, it was shown that principals of high-poverty rural schools that made AYP in Grade 3 reading reported significantly higher levels of guaranteed and viable curriculum than principals of high-poverty rural schools that did not make AYP. There were no significant differences in the presence of the school-level factors in rural schools without high poverty based on the principal reports. Additionally, the study identified which school-level factors predict student achievement in …

On Optimal Designs For Nonlinear Models: A General And Efficient Algorithm, Min Yang, Stefanie Biedermann, Yihui Tang

Faculty Articles, Papers, and Other Scholarship

Finding optimal designs for nonlinear models is challenging in general. Although some recent results allow us to focus on a simple subclass of designs for most problems, deriving a specific optimal design still mainly depends on numerical approaches. There is need for a general and efficient algorithm that is more broadly applicable than the current state-of-the-art methods. We present a new algorithm that can be used to find optimal designs with respect to a broad class of optimality criteria, when the model parameters or functions thereof are of interest, and for both locally optimal and multistage design strategies. We prove …

Psychological Biases Affect Hedonic Ratings, Wannita Jirangrat

LSU Doctoral Dissertations

Psychological biases in consumer testing may lead to misinterpretation of results and lower experimental power. Reports on various hedonic scales associated with psychological biases induced by sample presentation are limited in the literature. An appropriate experimental protocol could enable sensory scientists to accurately determine if a product is more or less liked. Overall, in this study some drawbacks of hedonic scales were revealed and some recommendations were made under specific circumstances. A more powerful design (SPRCBD) helped minimize positional and First Serving Order (FSO) biases in consumer tests by extracting more explained variances, resulting in decreased Type-II error in the …

Crystal Growth And An Investigation Of Structural Stability: Synthesis, Structure, And Physical Properties Of Yb(Mn,M)Xal12-X (M = Fe, Ru; X < 2.5) And Lnmnxga3 (Ln = Ho-Tm; X < 0.15), Bradford Wesley Fulfer

LSU Doctoral Dissertations

The contents of this dissertation describe the crystal growth, crystal structures, and physical properties of ternary intermetallic aluminides and gallides. These compounds are grown in an effort to determine how controlling reaction ratios using the flux growth method can impact chemical structure and physical properties. Three specific examples are given where slight changes in reaction ratios leads to crystalline products that adopt various structure types. LnMn2+xAl10-x (Ln = Gd, Yb) crystals adopt the CaCr2Al10 and ThMn12 structure types. We compare LnMn2+xAl10-x compounds adopting the CaCr2Al10 and ThMn12 structure types, and outline synthesis methods to obtain each polymorph. Magnetic susceptibility measurements …

Does Flexible Grouping Increase Retention Levels To Improve Test Scores More Than Traditional Lecture In The Science Classroom, Brian Joseph Carter

LSU Master's Theses

The purpose of my research was to analyze the effect flexible grouping had on science retention scores. Education faces so many challenges today. The old way of teaching, traditional lecture is being challenged. For centuries, traditional lecture was the primary way of teaching and most colleges still use this teaching method. In this thesis traditional lecture and flexible grouping are compared. Through the use of pretests and posttests in my traditional and honors chemistry classes, I tested both strategies. Presentation of seven chapters were used for data collection and through the research, several things were discovered. In this study, honor …

Background, Analysis, And Performance Guide For Edison Denisov's Sonata For Flute And Piano, Esther June Waite

LSU Doctoral Dissertations

After composer Edison Vasilievich Denisov (1929–1996) finished his graduate work at the Moscow Conservatoire, he launched into an independent examination of composers whose music had been banned by the Soviet authorities during his conservatory years (1951–1959). It was during this time in his compositional development that he composed his Sonata for Flute and Piano (1960). The first section of this document provides a biographical summary of Edison Denisov and the circumstances surrounding the composition of the flute sonata. The second section is devoted to formal, harmonic, and stylistic analysis of the sonata. The final section of the document provides a …

Constitutional Value Judgments And Interpretive Theory Choice, Ian C. Bartrum

Scholarly Works

No abstract provided.

Population Ecology Of The Ribbed Mussel In Southeastern Louisiana, Aaron Jacob Honig

LSU Master's Theses

Benthic intertidal bivalves play an essential role in estuarine ecosystems by contributing to habitat provision, water filtration, and promoting productivity. As such, ecosystem level changes that impact population distributions and persistence of local bivalve populations may have large ecosystem level consequences, making it important to better understand the population distribution and ecology of native bivalve populations. Gametogenesis, recruitment, growth, mortality, size structure and density of the ribbed mussel, Geukensia demissa, were examined across a salinity gradient in southeastern Louisiana. In summer 2012, 100-m transects were placed at interior and edge marsh plots to collect data on mussel density, and vegetation …

Impact Of Iudr In Rat 9l Glioma Cell Survival For 25-35 Kev Photo-Activated Auger Electron Therapy, Diane Alvarez

LSU Master's Theses

Introduction: Photo-activated Auger electron therapy is a potential technique that could preferentially target cancer cells. This binary therapy uses a drug containing a high-Z element like iododeoxyuridine (IUdR), which serves as a radiosensitizer and molecular carrier of high-Z iodine into cancer cell DNA. Iodine becomes the Auger electron source when activated by photons with an appropriate energy. This work studied the survival of rat 9L glioma cells with IUdR replacing thymidine in the DNA. Irradiations at monochromatic energies above and below the iodine K-edge (33.2 keV) are part of a larger study from 25-70 keV. It was hypothesized that SER10 …

Program Analysis : Termination Proofs For Linear Simple Loops, Hongyi Chen

LSU Doctoral Dissertations

Termination proof synthesis for simple loops, i.e., loops with only conjoined constraints in the loop guard and variable updates in the loop body, is the building block of termination analysis, as well as liveness analysis, for large complex imperative systems. In particular, we consider a subclass of simple loops which contain only linear constraints in the loop guard and linear updates in the loop body. We call them Linear Simple Loops (LSLs). LSLs are particularly interesting because most loops in practice are indeed linear; more importantly, since we allow the update statements to handle nondeterminism, LSLs are expressive enough to …

Discrete Phase Simulations Of Drilled Cuttings Transport Process In Highly Deviated Wells, Doguhan Yilmaz

LSU Master's Theses

Transporting drilled cuttings from the bottomhole to the surface becomes more difficult and problematic in highly deviated wells than in vertical wells. Cuttings tend to settle down on the low side of the annulus typically in the form of a bed which can cause further problems. The height of this bed depends on many parameters such as annular domain geometry, drilling fluid density and rheology, annular flow rate, drill pipe rotation speed, cuttings size, shape, and their density. Prediction of the stationary cuttings bed height with respect to these aforementioned parameters is thus necessary to optimize the range of the …

Approximate Sequence Alignment, Xuanting Cai

LSU Master's Theses

Given a collection of strings and a query string, the goal of the approximate string matching is to efficiently find the strings in the collection, which are similar to the query string. In this paper, we focus on edit distance as a measure to quantify the similarity between two strings. Existing q-gram based methods use inverted lists to index the q-grams of the given string collection. These methods begin with generating the q-grams of the query string, disjoint or overlapping, and then merge the inverted lists of these q-grams. Several filtering techniques have been proposed to segment inverted lists in …

Modeling And Simulation Of Surface Profile Forming Process Of Microlenses And Their Application In Optical Interconnection Devices, Zhengyu Miao

LSU Doctoral Dissertations

Free space micro-optical systems require to integrate microlens array, micromirrors, optical waveguides, beam splitter, etc. on a single substrate. Out-of-plane microlens array fabricated by direct lithography provides pre-alignment during mask fabrication stage and has the advantage of mass manufacturing at low cost. However, this technology requires precise control of the surface profile of microlenses, which is a major technical challenge. The quality control of the surface profile of microlenses limits their applications. In this dissertation, the surface forming process of the out-of-plane microlenses in UV-lithography fabrication was modeled and simulated using a simplified cellular automata model. The microlens array was …

An Analysis Of Cardiovascular And Respiratory Admission Rates As A Function Of Air Pollutants In The Baton Rouge Five-Parish Area, Heather Elizabeth Spindel

LSU Master's Theses

In past years, the Baton Rouge Air Quality Control Region has struggled with compliance of ozone standards. In June of 2003, the Baton Rouge Five-Parish Ozone Non-Attainment Area was classified as severe under the 1-hour ozone standard. In July of 2012, the EPA classified the area as marginal non-attainment for ozone. Although this is an improvement from its severe classification, studies have shown that health effects of air pollution can be detected at concentrations lower than the National Ambient Air Quality Standards. Additionally, clinical and epidemiological studies have shown that a majority of the criteria pollutants negatively affect cardiovascular and …

Magnetic Deflections Of Ultra-High Energy Cosmic Rays From Centaurus A, Azadeh Keivani

LSU Doctoral Dissertations

The origin and mass composition of ultra-high energy cosmic rays (UHECRs) are among the mysteries of particle astrophysics. Since UHECRs are mostly or entirely charged particles, they will be deflected in cosmic magnetic fields on their way to Earth. UHECR deflections in the Galactic magnetic fields (GMF) should be considered to identify their origin and nature.

The calculated Galactic magnetic deflections of UHECRs from a source strongly depend on the GMF model. I use the recent GMF model of Jansson and Farrar (JF12), a 35-parameter model which includes coherent, striated and random components and is constrained by WMAP7 Galactic synchrotron …

Amplifying Conjugated Polymers For Fluorescent Chemosensing, Deepa Pangeni

LSU Doctoral Dissertations

Chemo- and biosensors based on fluorescent conjugated polymers benefit from greater detection sensitivity due to amplification of the electronic perturbations produced by analyte binding. This amplification stems from the exciton-transporting properties of conjugated polymers. In the conventional sensor design paradigm, excitons migrate from the bulk of the polymer to the analyte binding sites which can be either fluorescence quenching sites (turn-off sensors) or lower energy fluorophores (turn-on sensors). In this dissertation, we proposed an alternative design paradigm when analyte binding creates a higher energy gap site in the polymer backbone. In the case of isolated polymer chains in dilute solution, …

The Effects Of Peer Instruction On Ninth Grade Students' Conceptual Understanding Of Forces And Motion, Nicole Congine Harvey

LSU Master's Theses

Because students are often taught physics in a traditional, lecture-based classroom, the present study was undertaken to test whether the use of peer instruction, specifically concept questions embedded within a PowerPoint that allows for students to interact throughout the lecture, affects learner outcomes in a classroom setting. The outcomes from classes taught using peer instruction were compared to classes taught with traditional, lecture-based teaching strategies. Students in five different sections of a 9th grade Physical Science class were given pre-tests and post-tests to determine their learning gains on the topics of motion and forces. In the first unit of instruction, …

A Metaheuristic-Based Simulation Optimization Framework For Supply Chain Inventory Management Under Uncertainty, Qinglin Duan

LSU Doctoral Dissertations

The need for inventory control models for practical real-world applications is growing with the global expansion of supply chains. The widely used traditional optimization procedures usually require an explicit mathematical model formulated based on some assumptions. The validity of such models and approaches for real world applications depend greatly upon whether the assumptions made match closely with the reality. The use of meta-heuristics, as opposed to a traditional method, does not require such assumptions and has allowed more realistic modeling of the inventory control system and its solution. In this dissertation, a metaheuristic-based simulation optimization framework is developed for supply …

3d Integration Of Micro- And Nanostructures Into Bio-Analytical Devices, Bahador Farshchian

LSU Doctoral Dissertations

This study aims to develop a process which allows 3D integration of micro and nanostructures in microchannels. A fabrication process was established for the large area integration of hierarchical micro and nanostructures in microchannels. This novel process, which is called 3D molding, takes advantage of an intermediate thin flexible stamp such as PDMS from soft lithography and a hard mold such as brass from hot embossing process. However, the use of a thin intermediate polydimethylsiloxane (PDMS) stamp inevitably causes dimensional changes in the 3D molded channel, with respect to those in the brass mold protrusion and the intermediate PDMS stamp …

Improving Routines : Self-Monitoring By Adolescents Diagnosed With Attention-Deficit/Hyperactivity Disorder, Meghan Ann Geary

LSU Doctoral Dissertations

Attention-Deficit/Hyperactivity Disorder (ADHD), though commonly diagnosed in childhood, continues to present with problematic symptoms through adolescence and adulthood (Barkley, Fischer, Edelbrock, & Smallish, 1990; Young & Amarasinghe, 2010). Despite the number of adolescents suffering from ADHD and the detrimental effects the symptoms can have on their lives, there is a paucity of research in interventions tailored to this population (Young & Amarasinghe, 2010). Additionally, an even smaller portion of this research addresses daily routines for adolescents, despite findings that maintaining routines are often very difficult for adolescents with ADHD (Bloomquist, 2005; Coghill et al., 2008; Pfiffner et al. 2007; Robin, …

Acoustic Biomass Of Fish Associated With An Oil And Gas Platform Before, During, And After "Reefing" It In The Northern Gulf Of Mexico, Grace Elizabeth Harwell

LSU Master's Theses

With over ~2600 oil and gas platforms (platforms) remaining in the northern Gulf of Mexico (Gulf), the Gulf States have access to one of the most unique fisheries in the world. Because of high abundances of game fishes around platform legs and the popular belief that platforms enhance fish stocks, both Louisiana and Texas have created artificial reef programs based upon the decommissioning of platforms. As oil and gas fields continue to be retired, oil and gas companies may find that “reefing” or toppling a platform may be a more economically viable alternative to complete removal of material. Questions remain …

Final Coastal Lakes Aquatic Plant Survey Report, Mary Pfauth, Mark Sytsma

Center for Lakes and Reservoirs Publications and Presentations

Invasive, non-indigenous plants can degrade water quality and fish habitat when they invade lakes, ponds, and streams. Changes in plant community architecture in lakes due to invasion by canopy-forming invasive aquatic plants can result in loss of native plant biodiversity and reduction of the structural complexity of the underwater habitat.

Lichens As A Biomonitoring Tool For Detecting Heavy Metal Air Pollution Associated With Industrial Activities In Collie, South-Western Australia, Meenu Chathurika Vitarana

Theses: Doctorates and Masters

During the last few decades, various techniques for using lichens as biomonitors have been developed for monitoring air pollution and forest ecosystem health. Lichens have been used effectively to determine the dispersion of heavy metals emitted by industrial point-sources; however the approach has not been commonly used in Australia. This thesis aimed to determine the effectiveness of using a lichen biomonitoring approach to measure the heavy metal pollutants emitted from coal-fired power stations and related industries in Collie, south-western Australia, an area with concern over poor air quality. Three different approaches to lichen biomonitoring were investigated. The first explored lichen …

On A Joint Physical Layer And Medium Access Control Sublayer Design For Efficient Wireless Sensor Networks And Applications, Mahir Lumumba Meghji

Theses: Doctorates and Masters

Wireless sensor networks (WSNs) are distributed networks comprising small sensing devices equipped with a processor, memory, power source, and often with the capability for short range wireless communication. These networks are used in various applications, and have created interest in WSN research and commercial uses, including industrial, scientific, household, military, medical and environmental domains. These initiatives have also been stimulated by the finalisation of the IEEE 802.15.4 standard, which defines the medium access control (MAC) and physical layer (PHY) for low-rate wireless personal area networks (LR-WPAN).

Future applications may require large WSNs consisting of huge numbers of inexpensive wireless sensor …

Teaching Excellence : An Illusive Goal In Higher Education Teaching And Learning, Heather Sparrow

Theses: Doctorates and Masters

In the last decades of the 20th Century, and through the first decade of the 21st Century, both the natural world and human society have experienced dramatic change. Contemporary society world-wide has high expectations of the contribution that universities can make in helping people learn to live with change, to lead change, to manage change, and to support improvement in all spheres of life. The global community seeks ‘excellence’ across all higher education roles: community engagement and leadership, research and innovation, and teaching and learning. However, universities are not always regarded as effective in fulfilling the needs of students, business …