Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2014

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 75541 - 75570 of 77013

Full-Text Articles in Entire DC Network

Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi Jan 2014

Numerical Experiments Of Hurricane Impact On Vertical Mixing And De-Stratification Of The Louisiana Shelf Waters, Mohammadnabi Allahdadi

LSU Doctoral Dissertations

The numerical model FVCOM (Finite Volume Community Ocean Model) was applied to study the effects of Hurricane Katrina on the vertical mixing over the Louisiana shelf and the process of post-storm re-stratification. Wind field from Hurricane Katrina was generated using a single vortex analytical model and was evaluated using available wind measurements over the shelf. Simulations of shelf circulation under Hurricane Katrina were done through several numerical tests to find the best approach for treating vertical eddy viscosity. Model results for the shelf during Katrina demonstrated opposite currents between surface and bottom for most of the shelf area. Results also …

Go to article

Design, Synthesis, And Evaluation Of Small Molecule-Based, Profluorogenic Activatable Substrate Probes For Detection And Visualization Of Human Cancer Enzyme Nad(P)H:Quinone Oxidoreductase-1, Suraj Uditha Hettiarachchi Jan 2014

Design, Synthesis, And Evaluation Of Small Molecule-Based, Profluorogenic Activatable Substrate Probes For Detection And Visualization Of Human Cancer Enzyme Nad(P)H:Quinone Oxidoreductase-1, Suraj Uditha Hettiarachchi

LSU Doctoral Dissertations

Cancer comprises many specific diseases, and it is currently responsible for millions of deaths worldwide. This broad disease profile is a great challenge for personalized oncology. Critical for the success of cancer therapy is the exploration of improved methodologies for the early detection of localized and disseminated tumor cells in patients, where bio-molecular imaging has become an indispensable tool. Being one of many different imaging techniques, optical fluorescence imaging has been translated over the years from the bench to clinical research, and it is now on the verge of being able to address some of the pressing challenges in molecular …

Go to article

Impact Of An Online Student Bridge Program For First-Year Nontraditional Students, Lisa Rene Adkins Jan 2014

Impact Of An Online Student Bridge Program For First-Year Nontraditional Students, Lisa Rene Adkins

Walden Dissertations and Doctoral Studies

Low retention rates for first-year students plague many higher education institutions, and are even lower among online institutions of higher education. At Athena Colleges (a pseudonym), the attrition rate can be as high as 50% in students' first academic year. To address this concern, Athena Colleges has implemented an online bridge program that addresses students' academic needs and persistence. The purpose of the study was to evaluate the effectiveness of the bridge program in reducing the first-time student attrition rate and academic performance in their first term. Most of Athena Colleges students are nontraditional students and due to this, the …

Go to article

The Influence Of Personal And Educational Demographic Factors On The Productivity Of Farmers In Selected Geographic Regions Of The Ukraine, Viacheslav L. Sereda Jan 2014

The Influence Of Personal And Educational Demographic Factors On The Productivity Of Farmers In Selected Geographic Regions Of The Ukraine, Viacheslav L. Sereda

LSU Doctoral Dissertations

The primary purpose of this study was to determine Ukrainian farmers characteristics based on demographic information, describe their agricultural production, land ownership, best farming practices and determine factors that could influence farmers’ gross income. Of the tree Oblasts selected, a total of 250 farmers were randomly selected in two of the oblasts and 150 in the other (due to the size of the population in the smaller sample) for personal interviews by the raion specialists. Random samples were drawn from these lists using a computerized random numbers table. Survey was designed to collect necessary information. Raion specialists received one-day training …

Go to article

Southern Sapphisms: Sexuality And Sociality In Literary Productions, 1974-1997, Jaime Cantrell Jan 2014

Southern Sapphisms: Sexuality And Sociality In Literary Productions, 1974-1997, Jaime Cantrell

LSU Doctoral Dissertations

Southern Sapphisms: Sexuality and Sociality in Literary Productions, 1974-1997, considers how queer and feminist theories illuminate and complicate the intersections between canonical and obscure, queer and normative, and regional and national narratives in southern literary representations produced during a crucial but understudied period in the historical politicization of sexuality. The advent of New Southern Studies—and its nascent emphasis on sexuality as an organizing principle of social relations—has focused almost exclusively on midcentury texts from the Southern Renascence, largely neglecting post-1970 queer literatures. At the same time, despite these developments in southern studies, most scholarship in women’s and feminist studies continue …

Go to article

Accountable Actors: Politics And Poetic Imagination In Huxley, Lewis, And Orwell, Sarah Beth Vosburg Jan 2014

Accountable Actors: Politics And Poetic Imagination In Huxley, Lewis, And Orwell, Sarah Beth Vosburg

LSU Doctoral Dissertations

What does it mean, and what does it take, to practice personal responsibility in the face of political oppression? In this dissertation, I trace the essential themes of responsibility through a critical analysis of three stories: Aldous Huxley’s Brave New World, C. S. Lewis’s That Hideous Strength, and George Orwell’s Nineteen Eighty-Four. No comparative study of these important works of twentieth-century political literature exists. Yet, each of these stories merits the attention of students of character and politics because all three unforgettably portray men who strive to live meaningful lives against the contrived meaning imposed on them by those in …

Go to article

The Sociocultural Basis Of Epidemiology Of Hypertension Among Residents Of Ogun State, Vernon E. Norman Jan 2014

The Sociocultural Basis Of Epidemiology Of Hypertension Among Residents Of Ogun State, Vernon E. Norman

Walden Dissertations and Doctoral Studies

There is a high prevalence of hypertension in Nigeria. Limited knowledge of hypertension, how to prevent it, its outcomes, rapid urbanization, and the adoption of Western eating habits are implicated. Hypertension is an important issue because chronic disease places economic, social, and disease burdens on society. The purpose of this mixed-methods study was to investigate lifestyle practices, knowledge, and attitudes on risks and prevention of hypertension among residents of Ogun State, Nigeria (N = 79). The conceptual framework for this study focused on how knowledge, attitudes, and practices influence the dietary habits, behaviors, and ultimately blood pressure . The PEN-3 …

Go to article

Gumbos- And Ionic Liquid-Coated Quartz Crystal Microbalance Sensors For Detection And Molecular Weight Determination Of Organic Vapors, Bishnu Prasad Regmi Jan 2014

Gumbos- And Ionic Liquid-Coated Quartz Crystal Microbalance Sensors For Detection And Molecular Weight Determination Of Organic Vapors, Bishnu Prasad Regmi

LSU Doctoral Dissertations

There has been an ever-increasing demand for the development of high-performance sensing devices for detection and discrimination of volatile organic compounds (VOCs) present in different environments. Among a number of sensing devices currently available, sorption-based sensors are particularly attractive because they are simple and inexpensive, require low power, and are appropriate for fabrication of multisensor arrays. A sorption-based sensor is comprised of a chemically active coating immobilized on the surface of a physical transducer. The chemically active film interacts with analytes, and the transducer converts the binding event into an electrical signal. This dissertation is focused on a sorption-based sensor …

Go to article

Analysis Of Media Coverage Of Selected Food Safety Events On The Demand For The Recalled Products, Abhishek Bhagwat Bharad Jan 2014

Analysis Of Media Coverage Of Selected Food Safety Events On The Demand For The Recalled Products, Abhishek Bhagwat Bharad

LSU Doctoral Dissertations

The major focus of this study was to identify the linkage between information and consumer behavior and to examine the role that a new media index played in the identifying the tone of news stories. Past studies have relied on using the number of media stories but, this study tests a new approach, i.e., in order to analyze the effect of information by incorporating the sentiment indices. These indices were created based on the tone of the news story. The results from sentiment indices were compared to the results from the information index. Barten’s Synthetic model (BSM) was used to …

Go to article

Model-Based Tests Of Historical Demography And Species Delimitation In The Caribbean Coral Reef Sponge Callyspongia, Melissa Barrett Debiasse Jan 2014

Model-Based Tests Of Historical Demography And Species Delimitation In The Caribbean Coral Reef Sponge Callyspongia, Melissa Barrett Debiasse

LSU Doctoral Dissertations

Coral reefs are the most productive and species rich ecosystems in the ocean yet we lack knowledge about the distribution of genetic variation the within and among reef species, particularly for the sponges (Porifera). My dissertation describes how genetic variation at mitochondrial and nuclear genes is partitioned among and within species in the sponge genus Callyspongia. I compared patterns of genetic diversity and population subdivision in the mitochondrial and nuclear genomes of one species, C. vaginalis, in Florida (Chapter 2). Previous work revealed three divergent mitochondrial lineages, but nuclear alleles did not correspond to either mitochondrial clade or geography. Coalescent …

Go to article

Giftedness And Overexcitability : Investigating The Evidence, Daniel Lawrence Winkler Jan 2014

Giftedness And Overexcitability : Investigating The Evidence, Daniel Lawrence Winkler

LSU Doctoral Dissertations

Many scholars of gifted education have often argued and believed that gifted individuals are neurologically overexcitable while non-gifted persons are not (Chang & Kuo, 2013; Harrison & Haneghan, 2011; Piechowski, 1979, 2006; Silverman, 2000a; Siu, 2010; Tieso, 2007a). This means that gifted persons are more sensitive, intuitive, empathic, and physically and emotionally aware. Some scholars have suggested that this significant degree of overexcitability may even mean that gifted persons are morally superior to non-gifted persons (Silverman, 1994). Over the past thirty years, this relationship between overexcitability (OE) and giftedness has become increasingly popular, as many websites, textbooks, and researchers have …

Go to article

Spatial And Temporal Analysis Of Selected Birth Defects And Risk Factors In The Baton Rouge, Louisiana Metropolitan Statistical Area, Aimee H. Moles Jan 2014

Spatial And Temporal Analysis Of Selected Birth Defects And Risk Factors In The Baton Rouge, Louisiana Metropolitan Statistical Area, Aimee H. Moles

LSU Doctoral Dissertations

About three percent of all infants are born with a congenital defect each year ranging from minor variants to life threatening abnormalities. The investigation and treatment of these problems is both costly and emotionally trying for all involved. Finding their origins is a complex process. Birth defects create the ultimate mystery in terms of trying to tease out the various influences created by the environment of both the infant and the mother. Two genetically different individuals are simultaneously affected both by their individual makeup and by the outside world impacting the air they breathe, the food they eat, and the …

Go to article

Poised Between Two Worlds : Nikolai Kapustin's Piano Sonata No. 1 And The Classical And Jazz Tradition, Kit Loong Yee Jan 2014

Poised Between Two Worlds : Nikolai Kapustin's Piano Sonata No. 1 And The Classical And Jazz Tradition, Kit Loong Yee

LSU Doctoral Dissertations

The music of Nikolai Kapustin is a roller coaster ride of syncopation, hemiolas, glissandos and perpetual motion. Born in Russia at a time when the communist government forbade such creative foreign elements as improvisation and jazz, Kapustin brought to life an innovative style of music that melded classical and jazz elements into a unique, emotive sound that leaves the listener breathless. The focus of this study is Kapustin’s Piano Sonata No. 1, Op. 39. This study goes through a detailed analysis of the sonata as a whole as well as each individual movement. It also includes a brief biography of …

Go to article

Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton Jan 2014

Application Of Scanning Probe Microscopy To Characterize Physical Properties Of Polymer Brushes, Photoactive Polymers And Rare Earth Oxide Nanostructures, Susan Denise Verberne-Sutton

LSU Doctoral Dissertations

A sample stage for characterizing photoactive materials was developed for studies with scanning probe microscopy (SPM). A sample stage was designed that directs light from a solar simulator via a fiber optic cable to illuminate the sample. Current-sensing and photocurrent measurements can be acquired with a conductive tip. The designed photocurrent stage can be used for SPM systems with a tip-mounted scanner. Current-sensing measurements can be taken with or without illumination to measure the current produced from organic photovoltaic (OPV) or photoconductive samples. Topography, lateral force and current-sensing images are acquired simultaneously, providing information of how nanoscale morphology affects the …

Go to article

Kapitza Resistance Of Si/Sio₂ Interface, Bowen Deng, Aleksandr V. Chernatynskiy, Marat Khafizov, David H. Hurley, Simon R. Phillpot Jan 2014

Kapitza Resistance Of Si/Sio₂ Interface, Bowen Deng, Aleksandr V. Chernatynskiy, Marat Khafizov, David H. Hurley, Simon R. Phillpot

Physics Faculty Research & Creative Works

A phonon wave packet dynamics method is used to characterize the Kapitza resistance of a Si/SiO2 interface in a Si/SiO2/Si heterostructure. By varying the thickness of SiO2 layer sandwiched between two Si layers, we determine the Kapitza resistance for the Si/SiO 2 interface from both wave packet dynamics and a direct, non-equilibrium molecular dynamics approach. The good agreement between the two methods indicates that they have each captured the anharmonic phonon scatterings at the interface. Moreover, detailed analysis provides insights as to how individual phonon mode scatters at the interface and their contribution to the Kapitza …

Go to article

Recalled Bullying: Development Of A Measure To Identify Childhood Victims And Perpetrators By Adults, Melissa Munson Jan 2014

Recalled Bullying: Development Of A Measure To Identify Childhood Victims And Perpetrators By Adults, Melissa Munson

LSU Doctoral Dissertations

The purpose of the study was to develop a psychometrically sound measure of recalled childhood bullying by adults who were either victims or perpetrators of this behavior. In order to accomplish this, a measure of childhood bullying, the Peer Interactions in Primary School (PIPS) Questionnaire, was modified into a retrospective measure in order to quantify recollections of childhood bullying by adults. Specifically, the modified PIPS (PIPS-R) was created to identify adults who identified themselves as bullies, victims, or bully-victims during their childhood or who do not recall having been a bully or a victim. Eight hundred and twelve undergraduate college …

Go to article

Phonon Thermal Transport Through Tilt Grain Boundaries In Strontium Titanate, Zexi Zheng, Xiang Chen, Bowen Deng, Aleksandr V. Chernatynskiy, Shengfeng Yang, Jinjun Xiong, Youping Chen Jan 2014

Phonon Thermal Transport Through Tilt Grain Boundaries In Strontium Titanate, Zexi Zheng, Xiang Chen, Bowen Deng, Aleksandr V. Chernatynskiy, Shengfeng Yang, Jinjun Xiong, Youping Chen

Physics Faculty Research & Creative Works

In this work, we perform nonequilibrium molecular dynamics simulations to study phonon scattering at two tilt grain boundaries (GBs) in SrTiO3. Mode-wise energy transmission coefficients are obtained based on phonon wave-packet dynamics simulations. The Kapitza conductance is then quantified using a lattice dynamics approach. The obtained results of the Kapitza conductance of both GBs compare well with those obtained by the direct method, except for the temperature dependence. Contrary to common belief, the results of this work show that the optical modes in SrTiO3 contribute significantly to phonon thermal transport, accounting for over 50% of the Kapitza …

Go to article

Performing Joseph Cornell's Chronotopes Of Assemblage, Sarah Kathryn Jackson Jan 2014

Performing Joseph Cornell's Chronotopes Of Assemblage, Sarah Kathryn Jackson

LSU Doctoral Dissertations

In this project I study Joseph Cornell’s practices of art-making through a performative lens. Rather than focusing on his finished products, I am interested in his embodied processes of assemblage. I call on Mikhail Bakhtin’s theory of the chronotope to articulate how time and space operate within Cornell’s finished works and his processes of assemblage art. In so doing, I conceptualize Cornell’s textual chronotope, métaphysique d’éphemera or “everyday magic,” as well as his chronotopes of assemblage: wandering, archiving, collaging, and assembling. I move from the finished work to the contingencies and strategies of the performance of assemblage. This project is …

Go to article

The Life And Work Of Mark Jacobi: Clarinet Repair In Philadelphia And The Influence Of Hans Moennig, John Anthony Coppa Jan 2014

The Life And Work Of Mark Jacobi: Clarinet Repair In Philadelphia And The Influence Of Hans Moennig, John Anthony Coppa

LSU Doctoral Dissertations

Since the invention of the clarinet there have been instrument repairmen and technicians who have properly maintained and serviced those instruments. This project presents the life and work of Mark Jacobi, one of the most influential clarinet repair technicians of the twentieth and twenty-first centuries. It connects the lineage of clarinet repair in Philadelphia and the life and traditions of Hans Moennig with the work currently being done in Mark Jacobi’s repair workshop. This document outlines the evolution of the clarinet barrel from its early incarnation as an attached extension of the mouthpiece section to its modern state as a …

Go to article

An Intersectional Exploration Of Race And Gender: Perceptions Of Women Faculty In Higher Education, Amy Hill Bourgeois Jan 2014

An Intersectional Exploration Of Race And Gender: Perceptions Of Women Faculty In Higher Education, Amy Hill Bourgeois

LSU Doctoral Dissertations

My own past experiences and my doctoral work form the origin from which I have chosen to examine the relationship that exists between race-based experiences and gender identity experiences within women faculty members in higher education. Multiple studies that examine faculty members’ experiences related to race and gender-related issues were identified; however, these studies were specific to non-white women. I was unable to locate studies that are inclusive of race and gender experiences of white women, and I am interested in gaining a parallel sense of understanding of the relationship that exists between race and gender in order to draw …

Go to article

Liberalism And The Dilemma Of Cultures, Ali Rezaie Jan 2014

Liberalism And The Dilemma Of Cultures, Ali Rezaie

LSU Doctoral Dissertations

In this project, through a closer examination of the controversies over Monica Ali’s Brick Lane (2003), Khaled Hosseini’s The Kite Runner (2003) and Azar Nafisi’s Reading Lolita in Tehran (2003), I seek to identify the elements of a defensible postcolonial vision. While postcolonialism is afflicted with many problematic assumptions, the exclusively liberal perspective which these authors seek to reaffirm in its place has its own plethora of defects. Ali, Hosseini and Nafisi merit a closer attention not only for their exposing some of the flawed views underlying postcolonialism but also for their demonstrating why an unqualified reversion to liberalism may …

Go to article

Fantini And Frescobaldi In Rome, Circa 1634: A Study Of Context And Practice, Shelby Allen Lewis Jan 2014

Fantini And Frescobaldi In Rome, Circa 1634: A Study Of Context And Practice, Shelby Allen Lewis

LSU Doctoral Dissertations

ABSTRACT This study clarifies historical evidence as applied to Italian baroque performance practices and repertoire for trumpet and pipe organ, circa 1630. It focuses upon a specific concert; the first historical record of a trumpet and pipe organ duo performing whereby the trumpeter takes a soloistic role. The details surrounding the performance, one involving trumpeter Girolamo Fantini and organist Girolamo Frescobaldi, make wonderful fodder for a more detailed musical look into 17th century Italy. Perhaps most importantly, the process outlined here can be modified and used in the study of music from virtually any genre from any musical period. Ultimately, …

Go to article

The Anti-Inflammatory Effects Of Vitamin D And Exercise, Laura Ann Forney Jan 2014

The Anti-Inflammatory Effects Of Vitamin D And Exercise, Laura Ann Forney

LSU Doctoral Dissertations

Elevated inflammation is associated with several chronic diseases, including obesity. Exercise is an established effective treatment of this condition by decreasing adiposity and independently regulating inflammatory pathways. The potential for vitamin D to confer anti-inflammatory benefits has been explored in cell culture studies, but few have explored its action at the whole body level. PURPOSE: To investigate the relationship between inflammatory markers in trained and untrained individuals with vitamin D levels either above or below a suggested optimal concentration. METHODS: College-aged females (N = 63), both trained and untrained, reported to the lab four times: to assess body size and …

Go to article

Performance Improvement Of Distributed Computing Framework And Scientific Big Data Analysis, Praveenkumar Kondikoppa Jan 2014

Performance Improvement Of Distributed Computing Framework And Scientific Big Data Analysis, Praveenkumar Kondikoppa

LSU Doctoral Dissertations

Analysis of Big data to gain better insights has been the focus of researchers in the recent past. Traditional desktop computers or database management systems may not be suitable for efficient and timely analysis, due to the requirement of massive parallel processing. Distributed computing frameworks are being explored as a viable solution. For example, Google proposed MapReduce, which is becoming a de facto computing architecture for Big data solutions. However, scheduling in MapReduce is coarse grained and remains as a challenge for improvement. Related with MapReduce scheduler when configured over distributed clusters, we identify two issues: data locality disruption and …

Go to article

The Role Of Viral Glycoproteins And Tegument Proteins In Herpes Simplex Virus Type 1 Cytoplasmic Virion Envelopment, Dmitry Vladimirovich Chouljenko Jan 2014

The Role Of Viral Glycoproteins And Tegument Proteins In Herpes Simplex Virus Type 1 Cytoplasmic Virion Envelopment, Dmitry Vladimirovich Chouljenko

LSU Doctoral Dissertations

Herpes simplex virus type 1 (HSV-1) is a ubiquitous neurotropic alphaherpesvirus transmitted by contact with mucocutaneous surfaces of infected individuals. HSV-1 enters the host by fusion of the viral envelope with the host cell plasma membrane, followed by translocation of the viral capsids to the nucleus where viral DNA is injected into the host cell nucleus to initiate viral replication. To generate infectious virions, newly assembled capsids travel to the cytoplasm and undergo a process called secondary envelopment by budding into cytoplasmic vesicles derived from the trans-Golgi network. Cytoplasmic envelopment is a complex process involving interactions between a multitude of …

Go to article

The Effects Of Three Dimensional Modeling On Labor Productivity Through Enhancing Visualization Of Craft Workers In The Industrial Construction Industry, Gerrad Delatte Jan 2014

The Effects Of Three Dimensional Modeling On Labor Productivity Through Enhancing Visualization Of Craft Workers In The Industrial Construction Industry, Gerrad Delatte

LSU Doctoral Dissertations

The primary purpose of this study was to determine if the use of three dimensional (3D) modeling to enhance visualization of structural steel installation would increase labor productivity of industrial construction workers in a selected industrial facility in southeastern Louisiana. The construction industry has seen a decline in labor productivity for many years. The effects of low labor productivity in the construction sector causes unnecessary escalated costs, scheduled completion dates to slip, and conflicts between the owner, engineering firm, and the construction company. The need for reversing this decline and improving construction productivity is critical. The loss of productivity has …

Go to article

The Phosphodiesterase-4 Inhibitor Rolipram Attenuates Heroin-Seeking Behavior Induced By Cues Or Heroin Priming In Rats, Miaojun Lai, Huaqiang Zhu, Anna Sun, Dingding Zhuang, Dan Fu, Weisheng Chen, Han-Ting Zhang, Wenhua Zhou Jan 2014

The Phosphodiesterase-4 Inhibitor Rolipram Attenuates Heroin-Seeking Behavior Induced By Cues Or Heroin Priming In Rats, Miaojun Lai, Huaqiang Zhu, Anna Sun, Dingding Zhuang, Dan Fu, Weisheng Chen, Han-Ting Zhang, Wenhua Zhou

Faculty & Staff Scholarship

Inhibition of phosphodiesterase-4 (PDE4), an enzyme that specifically hydrolyzes cyclic adenosine monophosphate (cAMP) increases intracellular cAMP/cAMP-response element binding protein (CREB) signaling. Activation of this signaling is considered as an important compensatory response that decreases motivational properties of drugs of abuse. However, it is not known whether PDE4 is involved in heroin seeking. Self-administration of heroin (50

Go to article

In Utero Exposure To Second-Hand Smoke Aggravates Adult Responses To Inhaled Irritants, Rui Xiao Jan 2014

In Utero Exposure To Second-Hand Smoke Aggravates Adult Responses To Inhaled Irritants, Rui Xiao

LSU Doctoral Dissertations

In utero exposure to second-hand smoke (SHS) has modulatory effects on adult lung responses to various irritants. To further elucidate diverse responses with different inhaled irritants and to understand how long the effects persist, we have focused on two environmentally-relevant and asthma-associated irritants--SHS and ovalbumin (OVA)--for adult mice that had been exposed in utero to SHS. We hypothesized that in utero SHS exposure aggravates lung responses to various inhaled irritants, including SHS and OVA, in adult mice beyond the age of 15 weeks; and that the responses will likely exhibit a sex bias. Pregnant BALB/c mice were exposed (days 6-19 …

Go to article

Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson Jan 2014

Based On Teacher Perceptions, Would The Use Of Social Media Via Mobile Devices In Grades 9-12 Classrooms Increase Student Engagement In Learning Activities?, Rodney J. Johnson

LSU Doctoral Dissertations

This research study addressed teachers’ perceptions of the use of social networking via mobile devices and the impact that social media accessed via mobile devices has on the learning engagement of students in grades 9-12 in select Louisiana high schools, in a rural southern parish of the United States (Gibbs, 2012). The study examined teachers’ perceptions of whether or not the use of social media improved students’ engagement in learning activities. Some researchers assert that the use of social media and smart cell phones is both the current and future mode of communication and that educators would do well to …

Go to article

Conducting Polymer Nanowires For Multi-Analyte Chemiresistive Sensing, Edward Song Jan 2014

Conducting Polymer Nanowires For Multi-Analyte Chemiresistive Sensing, Edward Song

LSU Doctoral Dissertations

A conducting polymer nanowire-based chemiresistive sensor array was developed for the liquid-phase multi-analyte detection. The ability to distinguish and quantify multiple chemical species with a single sensory device can be useful in many areas including food industry, pollution control, biosensors, and explosives detection. A polyaniline nanowire is a good candidate for use as a chemiresistive sensing material due to its large resistivity change and ease of synthesis. However the two most important issues in chemiresistive sensors are the reproducibility in sensing and the selectivity in chemical species. For improving the reproducibility in polyaniline-based chemiresistive sensing, a self-calibration mechanism was proposed. …

Go to article

First Prev Next Last