Digital Commons Network^™

Factors Affecting Superfund Hazardous Waste Site Cleanups, Leili Solatyavari

Graduate Research Theses & Dissertations

My dissertation focuses on assessing environmental equity in neighborhoods hosting hazardous waste lands known as Superfund sites. I define environmental equity as equal and timely removal of Superfund sites regardless of the demographic profile of hosting communities. In the first chapter, I introduce the Superfund program and various steps that need to be taken by the EPA in order to remove a hazardous site from a neighborhood. The second chapter discusses theoretical frameworks that motivate the empirical analysis by visualizing the Superfund enforcement and cleanup process.

The third chapter objectives are twofold. First, I investigate the factors that may affect …

Functions Of Dfrp And Other Drg Pathway Genes In The Moss Physcomitrella Patens, Robert James Srygler

Graduate Research Theses & Dissertations

GTP binding proteins (G proteins) are molecular switches that regulate many aspects of physiology in all cells. DRG1 and DRG2 (Developmentally Regulated GTP-binding proteins) have been found in all eukaryotes examined. Amino acid identity across eukaryotes is about 65% within an orthologous group and 55% between paralogs of a single species. Although DRGs are likely involved in some aspect of translation regulation, details of their precise cellular functions are not known.

In addition to DRGs there are other genes/proteins that comprise the “DRG pathway.” DFRPs (DRG Family Regulatory Proteins) have been shown to physically and genetically interact with DRGs. Previous …

Highly Efficient Gan-Based Single-Phase Transformer-Less Pv Grid-Tied Inverter, Khaled Alatawi

Electronic Theses and Dissertations

Growing energy demand and environmental concerns have led to an increased interest in renewable energy resources to provide a sustainable and low carbon emission energy supply. Among these renewable energy resources, photovoltaic (PV) systems have been the focus of many scientific researchers. The most vital component of a PV system that needs to be improved is the power converter. Grid-tied transformer-less inverters have gained a lot of interest in recent years because of their higher efficiency, reduced volume and lower cost compared to traditional line transformer inverters.

This dissertation discusses single-phase transformer-less inverter challenges and provides solutions that could lead …

A Lingua Franca Afloat And Ashore: Contact English In American Sea Fiction, 1824 To 1914, Fredrik Reidar Stark

Graduate Research Theses & Dissertations

This dissertation examines how American sea writers between 1824 and 1914 promoted new perceptions of English as a various and expanding intercultural and international language. It argues that presentations of language contact form a critically underemphasized component of American nautical literature. It surveys how such presentations take shape in James Fenimore Cooper’s The Pilot (1824) and The Crater (1847), Edgar Allan Poe’s The Narrative of Arthur Gordon Pym (1838), and Richard Henry Dana’s Two Years before the Mast (1840). It asserts that Herman Melville’s innovative presentations of contact between pidgins and native varieties of English in Typee (1846) and Omoo …

Outpatients' And Treatment Providers’ Cultural Model(S) Of Mental Illness In Northern Illinois, Emily Jean Stephen

Graduate Research Theses & Dissertations

For this thesis, I interviewed outpatients and clinicians from mental health treatment providers from the DeKalb, Illinois area to investigate the cultural models of mental illness held by both groups. I employed ethnographic methods of semi-structured interviews, and with cognitive tasks (free-listing, and pile sorting) to research similarities and differences between the outpatients’ and mental health treatment providers’ cultural models of ‘mental illness.’ Both mental health clinicians and outpatients have experience with disorders commonly termed ‘mental illness.’ I found differences of experience and identity seemed to more strongly influence one’s cultural model of mental illness than one’s level or type …

Development Of Synthetic Methodologies Of Nucleophile-Electrophile Chemistry, Michael R. Stentzel

Graduate Research Theses & Dissertations

The work outlined in this dissertation describes the development of synthetic methodologies utilizing a wide electrophilicity range of substrates towards the synthesis of new compounds. Substitution, addition, and superelectrophilic chemistry are powerful tools to afford potentially important compounds. These concepts are summarized in chapter 1.

Chapter 2 describes the capture of superacid catalyzed fluorenyl cations with nitriles (Ritter reaction) and alcohols. Optimization of reaction conditions and extensive scope studies were performed.

In chapter 3, the Michael addition of organometallic reagents with N-heterocyclic substituted olefins is explored. The nucleophilic carbanion intermediate species is shown to have reactivity towards strong electrophiles. With …

The Design, Synthesis, And Evaluation Of Inhibitors Of The Ispf Enzyme In The Mep Pathway, Christopher G. Stewart

Graduate Research Theses & Dissertations

Isoprenoids are a class of over 50,000 compounds that serve as key precursors for many compounds in plants and animals. These compounds play critical roles in many biological functions such as cellular growth, respiration, and go on to form critical compounds such as steroids and vitamins. Despite their overall necessity to life their biosynthesis only follows two synthetic pathways. These pathways are the Mevalonic Acid (MVA) Pathway and the 2-C-Methyl-D-Erythritol-4-Phosphate (MEP) Pathway also known as the non-mevalonate pathway. The MVA pathway is found primarily in humans and some higher plants while the MEP pathway is found in bacteria and some …

Ita Language Proficiency Testing: Recommended Replacement For The Speak® Test, Anne Marie Stoughton

Graduate Research Theses & Dissertations

Oral language tests have been used since the 1950s to assess the proficiency of spoken language. In the 1980s and 1990s, the need for oral proficiency testing increased as states began to mandate that universities within their jurisdictions test the English proficiency of instructors due to growing concerns over international teaching assistants’ (ITAs) comprehensibility. Many universities turned to the Speaking Proficiency English Assessment Kit® (SPEAK test), a language proficiency test created and distributed by the Educational Testing Service (ETS), as means to test ITA proficiency in English. ETS’s discontinuance of the SPEAK test in 2010 has forced, and is forcing, …

Why Do Symbiodinium Migrate? Evolutionary Conflict In A Host-Symbiont Community, Jacey Lynn Strohecker

Graduate Research Theses & Dissertations

Climate change is an increasing problem for species all around the globe, including coral reef communities, which are among the most diverse and productive in the world. The mutualistic symbiosis between corals and photosynthetic dinoflagellates (symbionts) is central to these ecosystems. The rising temperatures are causing corals to lose their symbionts in a process known as bleaching, thus endangering the entire community. In this context, it is imperative to discover mechanisms that might mitigate the effects of stress on corals. Previous work has established that stress increases the formation of reactive oxygen species (ROS), that is, partially reduced forms of …

A Climatology Of Quasi-Linear Convective Systems In The U.S., Jacob Adam Strohm

Graduate Research Theses & Dissertations

Quasi-linear convective systems, or QLCSs, are a common, organized thunderstorm mode in the U.S. Over the last fifty years, severe weather research has focused on the supercell, but, recently, QLCSs have become an increasingly important area of study. Researchers and operational meteorologists realize that this morphology is difficult to forecast and may be responsible for a large proportion of the severe weather reports in the eastern two-thirds of the U.S. This study seeks to determine the degree to which QLCSs threaten humans and their assets by, first, assessing their climatology and, second, measuring their contribution to the severe report record. …

Magnetotransport In Zrte5 Crystals, Maksim Andreevich Sultanov

Graduate Research Theses & Dissertations

ZrTe5 is a topological material that is predicted to have a strain or temperature induced phase transition from a topological insulator state into a Weyl/Dirac semimetal state. In this study I find that there is insufficient evidence to support the claims for the existence of such a phase transition. I performed magnetoresistivity measurements using a Quantum Design Physical Properties Measurement System (PPMS) to measure the transverse and longitudinal resistivities at various temperatures and different strengths and orientations of the magnetic field. The measurement results were analyzed using OriginPro to determine the carrier mobility and density and to determine the temperature …

Beyond School Engagement: School Adaptation And Its Role In Bolstering Resilience Among Youth Who Have Been Involved With Child Welfare Services, Skyler S. Leonard

Electronic Theses and Dissertations

Objective: Youth involved with the child welfare system are at significant risk of poor school functioning and mental health. Little research has explored how the connection to school impacts known relationships between adversity and youth outcomes. The following project sought to shed light on the role of schools in conferring risk or resilience for youth in contact with the child welfare system, with regard to their mental health. The overall aims of this project were to (1) improve our conceptualization of school adaptation, with particular attention to individual variation along multiple dimensions of school adaptation, (2) examine the relationship of …

Are They Activated? The Study Of Age Metastereotype Activation In A Workplace Context, Courtney L. Thomas

Graduate Research Theses & Dissertations

This thesis addresses the topic of metastereotype activation in the workplace. The thesis reports research that was conducted in pursuit of two goals. The first goal was the development of an implicit measure of age metastereotype activation. The second goal was to refine and test a theoretical model of metastereotype activation in the workplace. The model suggests that age metastereotype activation in the workplace depends upon contextual elements (e.g., age salience and evaluation salience) as well as various individual difference factors (e.g., age metastereotype consciousness, age identification, age prejudice, public self-consciousness, and external locus of control). Three studies were conducted …

Investigation Of An Inquiry-Based Learning Intervention On Undergraduate Saudi Women’S Critical Thinking Skills In An English As A Foreign Language Reading And Writing Class During The Preparatory Year, Rehabe Tikruni

Graduate Research Theses & Dissertations

The purpose of this study was to investigate the implementation of an inquiry-based learning (IBL) intervention and its influence on the critical thinking (CT) skills of Saudi women undergraduates enrolled in an English as a Foreign Language (EFL) reading and

writing course during the preparatory year. This study utilized a qualitative case study design from one public university in Saudi Arabia during the second semester of the preparatory year English program in Fall 2018. Thirty-five women participated in the IBL intervention

and the pre- and post-reflective essays. To delve deeper into perceptions about IBL and its potential influence on critical …

Is A Picture Worth A Thousand Numbers? An Exploration Of Understanding And Recall Of Data Presentations, Holly L. Roof

Electronic Theses and Dissertations

This dissertation reports results of a study with a quasi-randomized experimental component and a protocol analysis, or think aloud, component. The experimental component was designed to determine if people with no statistical training and people with some statistical training differed in their understanding and recollection of statistical information with varying degrees of complexity. Information was presented using data visualization techniques based on cognitive theory and compared to presentations using APA-style numerical tables of statistical output. The focus was on using empirically-supported graphical displays in PowerPoint presentations such as one might see at a research conference. Classroom groups of beginning and …

Discovery Of Selective Probes Targeting Rna Polymerase I, Xiao Tan

Theses and Dissertations--Chemistry

RNR Polymerase I (RNA Pol I) is a “factory” that orchestrate the transcription of ribosomal rRNA for constructing ribosomes as a primary workshop for protein translation to sustain cell growth. Misregulation of RNA Pol I can cause uncontrolled cell proliferation, which leads to the development of cancer. Yeast (Saccharomyces cerevisiae) is a valuable model system to study RNA Pol I. Recently, the X-ray crystal structure of the yeast homologue of RNA Pol I was elucidated, offering the structural basis to selectively target this transcriptional machinery. The approach to selective RNA Pol I targeting was to disrupt the interaction …

Investigation Of Thiol-Containing Biomarkers And Their Role In The Exposome, Tracy Gastineau-Stevens

Theses and Dissertations--Chemistry

Exposomics is an emerging area of study that looks at how the environment around a person or persons affects their overall health. Biomarkers have emerged as useful tools to better understand how the exposome affects a person. In this work, we investigate two potential endogenous biomarkers, homocysteine and glutathione that have been previously implicated in a number of diseases that have been linked to environmental causes. We also investigated an environmental exposure, the fungicide Ziram, which epidemiologically has been linked to diseases. In our investigation, we utilized capillary electrophoresis and capillary electrophoresis-mass spectrometry to develop a method for homocysteine and …

Multi-Scale Computational Studies Of Calcium (Ca2+) Signaling, Bin Sun

Theses and Dissertations--Chemistry

Ca²⁺ is an important messenger that affects almost all cellular processes. Ca²⁺ signaling involves events that happen at various time-scales such as Ca²⁺ diffusion, trans-membrane Ca²⁺ transport and Ca²⁺-mediated protein-protein interactions. In this work, we utilized multi-scale computational methods to quantitatively characterize Ca²⁺ diffusion efficiency, Ca²⁺ binding thermodynamics and molecular bases of Ca²⁺-dependent protein-protein interaction. Specifically, we studied 1) the electrokinetic transport of Ca²⁺ in confined sub-µm geometry with complicated surfacial properties. We characterized the effective diffusion constant of Ca²⁺ in a cell-like environment, which helps to understand …

Lhuft Bibliography Supplement January 2019, Jane Deighan, Karyl Johnson

Bibliographies

No abstract provided.

Boilerplate And The Impact Of Disclosure In Securities Dealmaking, Jeremy Mcclane

Vanderbilt Law Review

Capital markets dealmaking, like many kinds of business transactions, is built on a foundation of copied and recycled language what many call boilerplate. Regulators and the bar periodically call for less reliance on boilerplate, but despite these pressures, boilerplate remains a fixture of ever-growing securities disclosures. This Article explores why boilerplate persists and how it affects investors, showing that boilerplate may have a more complex role than commonly recognized. This Article does so by developing a theory on the effect of boilerplate in securities disclosure-a context that is little studied despite a wealth of literature on boilerplate in other settings--and …

Athletic Trainers’ Value In Physician Practice, Forrest Q. Pecha

Clinical Practice in Athletic Training

No abstract provided.

Preparing Teacher Candidates To Collaborate With Families And Communities: Standards, Research, And Practice, Karen S. Buchanan, Thomas D. Buchanan

Northwest Journal of Teacher Education

Preparing teacher candidates to engage with family and community in ways that align with the reality of today’s classroom is a critically important aspect of fostering student academic success and well-being. This paper examines how a set of professional preparation standards, the teacher preparation literature, and a qualitative inquiry into the practices and challenges of kindergarten teachers working with family and community converge to inform the work of teacher educators. Implications of these three sources of expert knowledge are instructive for teacher educator practice. Implications for the preparation of teacher candidates around family/community engagement include: the shaping of teacher candidate …

Psyc 462/862: Motivation And Emotion, Carolyn R. Brown-Kramer

UNL Faculty Course Portfolios

In this course portfolio, I examine the course goals, learning objectives, teaching methods and materials, assessments, and outcomes for an upper-level psychology elective course, PSYC 462/862, Motivation and Emotion. The course introduces students to the major theories of motivation and emotion, develops their ability to critically examine empirical psychological research, encourages the application of theoretical and empirical work to real-world contexts, and strengthens students’ communication skills. For each of the four course goals, I describe how and why I conduct the course as I do, as well as how my pedagogical choices influence student learning and engagement. Data analyses and …

Psyc/Wmns 421/821: Psychology Of Gender, Kathryn Holland

UNL Faculty Course Portfolios

This benchmark portfolio describes the process of developing and assessing student learning in Psychology of Gender (PSYC/WMNS 421/821)—a course I taught in Spring 2019 while participating in the Peer Review of Teaching Project at the University of Nebraska Lincoln. This course is housed in the Psychology Department and cross-listed in Women’s and Gender Studies. The students in this course are mostly advanced undergraduate psychology majors. The course is capped at 40 and is primarily discussion-based. In my portfolio, I outline the course structure and context, my course objectives, and the students enrolled. I also document the teaching materials, methods, and …

Course Portfolio For Assessing Student Learning Surrounding Biological Examples In Bsen244: Thermodynamics Of Biological Systems, Forrest M. Kievit

UNL Faculty Course Portfolios

Thermodynamics is a course required in many engineering disciplines as it covers concepts utilized in many upper level engineering courses. In the Biological Systems Engineering Department at the University of Nebraska – Lincoln, this course, in a way, acts as a gateway to the major since this will be one of the first classes where the students must apply and hone their problem-solving skills. This course was developed to allow students in the department to have access to a thermodynamics course that relates to their major area of interest – biological systems. However, many concepts in thermodynamics do not have …

Bioc 321: Elements Of Biochemistry – A Peer Review Of Teaching Project Benchmark Portfolio, Jing Zhang

UNL Faculty Course Portfolios

The benchmark portfolio of Biochemistry 321, Elements of Biochemistry, aimed to provide a broad overview for this large-enrollment class for non-biochemistry majors. This course was delivered in a blended format, and the learning objectives were aligned with the American Society of Biochemistry and Molecular Biology (ASBMB) foundational concepts and skills. Classroom response system iClicker was employed and Think-Pair-Share method was utilized to facilitate the in-class discussion and group-learning. Additional activities include the 3D molecular models for visualizing and hands-on learning of the structure-function relationship concept, and practicing problem-solving through the end-of-chapter essay questions. Data analysis suggested that the iClicker response …

Smaller, More Frequent Assessments May Reduce Students’ Ability To Recall Information, Renee M. Mcfee

UNL Faculty Course Portfolios

Frequent, low-stakes, formative assessments can provide valuable feedback to both students and instructors. Formative assessments have also been shown to enhance student learning. However, many STEM instructors, including those in professional schools, rely solely on high-stakes, summative assessments such as unit, mid-term, or final exams. Our goal was to determine how administration of weekly quizzes impacts student learning (n = 27) in a graduate/professional-level veterinary physiology course. For 2 units (endocrine and cardiovascular), weekly quizzes were administered in addition to a summative, unit exam. Quizzes consisted of lower-order questions (e.g. recall) while exams consisted of higher-order questions (e.g. integrate, apply). …

Teaching Communication Skills In A Computing Course: An Experience Report, Suzette Person

UNL Faculty Course Portfolios

No abstract provided.

Benchmark Portfolio: Cive 334 - Introduction To Geotechnical Engineering, Seunghee Kim

UNL Faculty Course Portfolios

This Benchmark Portfolio is for CIVE 334 “Introduction to Geotechnical Engineering”. The course description is provided as “soil composition, structure and phase relationships; soil classification; principles of effective stress; loading induced subsurface stresses; load history; deformation and failure of soils; elastic and limit analysis with applications to design for bearing capacity, settlement, retaining walls, and slope stability; steady-state seepage.” This course is mandatory for students in the department of civil engineering, and the only mandatory class in the sub-discipline of geotechnical engineering. Therefore, this course is critical for students to have foundational knowledge about soil mechanics and geotechnical engineering, and …

Peer Review Of Teaching Benchmark Portfolio – Sped 414: Instructional Methods For Teaching Mathematics To Students With Mathematics Learning Disabilities, Jessica Namkung

UNL Faculty Course Portfolios

The primary purposes of the benchmark portfolio were to systematically document revisions made to the course, SPED 414: Instructional Methods for Teaching Mathematics to Students with Mathematics Learning Disabilities (SPED 414), to refine and explore more effective ways to teaching the course, and to build better connections and in-depth, higher level in-class activities and discussions. Specifically, I focused on reorganizing the course content, incorporating more hands-on activities (e.g., small and large group discussions, real-life examples), implementing “Keep, Stop, Start” mid-evaluation, and conducting a pre- and post-assessment on the main course objectives. Both qualitative and quantitative analyses based on …