Digital Commons Network^™

The World, Rebecca Dawn Billings

Theses and Dissertations

A poem comes into the world when an obsession takes hold of a person who must write about it. These twenty-eight original poems are products of obsession and pleasure.

New Distributional Data For The Northern Forestfly, Lednia Borealis Baumann And Kondratieff, 2010 (Plecoptera: Nemouridae), In Washington, Usa, Candace E. Fallon, Emilie Blevins, Michele Blackburn, Taylor B. Cotten, Derek W. Stinson

Western North American Naturalist

The northern forestfly, Lednia borealis Baumann and Kondratieff, 2010 (Plecoptera: Nemouridae), is a rare montane stonefly that until recently was thought to be endemic to Washington State. It is one of 4 described Lednia species in the western United States and Canada and the only member of its genus known to occur in Washington. All 4 Lednia species are associated with cold-water habitat in alpine and subalpine habitats; because of this, they may be especially vulnerable to threats associated with climate change. However, L. borealis is rarely targeted in species inventories or survey efforts, and more information is needed about …

Explicit Instruction In Second Language Self-Assessment: Exploring The Potential For Improving Calibration Through Training, Rachael Reynolds

Theses and Dissertations

This study explores the effect of an explicit training module on improving language learner ability to accurately self-assess second-language proficiency. There was a total of 409 intermediate and advanced level participants across six languages: French, Italian, Japanese, Portuguese, Russian and Spanish. Most of the participants had extensive immersion backgrounds. The Language Ability Self Evaluation Resource (LASER) was used to measure the perceived proficiency of the participants (self-assessed language ability). The Oral Proficiency Interview – Computer (OPIc) was used to measure the actual proficiency of the participants (rater-assessed language ability). The participants were randomly assigned to either the control or experimental …

Physical Place And Online Space: Permeability, Embodiment, And Gender In Two Online, Synchronous Critical Multicultural Teacher Education Courses, Elizabeth Finlayson Harris

Theses and Dissertations

This semester-long microethnography explores how the emotional geography in two online, synchronous critical multicultural education courses are shaped by online interactions and infrastructures as well as social frames. Using a microethnographic approach, video data, interviews, and open-ended questionnaires revealed patterns of interactions suggesting an online emotional geography characterized by a duality of physical place and online space. Key findings suggest that the levels of permeability in student and instructor's physical location influence how online participants gave or received emotion gifts and performances in online spaces. This study further supports emergent research suggesting gender frames as relevant in students' level of …

“If I Could Do This, I Feel Anyone Could:” The Design And Evaluation Of A Two-Factor Authentication Manager, Garrett D. Smith

Theses and Dissertations

Two-factor authentication (2FA) is a strong defense against account compromise. However, usability studies reveal challenges with 2FA setup. The process to manually setup and remove 2FA methods differs across websites. We present a system design for a 2FA manager to automatically setup and remove 2FA methods. Potential benefits are reduced time, fewer mistakes, consistent terminology, a single workflow for users to learn, and the ability to rapidly transition to a new 2FA method—e.g., when replacing a lost 2FA method. We create two proof-of-concept implementations of our design, one as a browser extension and one integrated as a feature in an …

The Novel Protein Crystallization Chaperone Telsam Stabilizes Weak Crystal Contacts, Accelerates Crystallization Of Fused Target Proteins, And Solves The Crystallographic Phase Problem, Supeshala Dilrukshi Sarath Nawarathnage

Theses and Dissertations

We studied the usefulness of genetic fusion to TELSAM polymers as an effective protein crystallization strategy. We observed novel properties in crystals of two TELSAM-target protein fusions. TELSAM as a crystallization chaperone shows rapid crystallization when it's fused to target proteins and possibly with a greater propensity. Some TELSAM-target fusions crystallized more rapidly than the same target protein alone. TELSAM-target proteins can be crystallized at relatively low protein concentrations such as 0.1 mg/mL. TELSAM requires no TELSAM polymers touching one another in the crystal lattice in order to form well-diffracting crystals. This lack of crystal contacts has not been observed …

Cross-Cultural Validation And Psychometric Testing Of The Debriefing Experience Scale (Des): A Cross-Sectional Study, Ya Dian Xie, Xin Yi Li, Qian Liu, Run Huang, Ting Li, Ya Xuan Fang, Dan Luo, Yonghui Wan, Bing Xiang Yang, Shelly J. Reed

Faculty Publications

Background

The Debriefing Experience Scale (DES) is a tool that is used to explore nursing students’ subjective experiences during a debriefing and to help determine best debriefing practices. A Chinese version of the scale has not been found; its development can enhance learning in simulation activites in Chinese healthcare education programs.

Methods

A simplified Chinese version of the DES was developed and tested using 34 Chinese undergraduate (second year) nursing students. They participated in six simulation scenarios and debriefings. Eight experts were consulted to determine the content validity of the scale. Critical ratio method, Cronbach’s alpha, intraclass correlation coefficient, correlation …

The Effects Of Various Inlet Distortion Profiles On Transonic Fan Performance, Andrew Michael Bedke

Theses and Dissertations

An increased understanding of how inlet flow distortion affects transonic fans enables improved fan design and performance prediction. Inlet distortion refers to non-uniformities in the incoming flow properties. Complex inlet ducts in high performance aircraft result in distorted flow at the fan inlet. In this thesis, two studies were performed using Unsteady Reynolds-Averaged Navier Stokes (URANS) simulations. The first study focused on understanding how the transition abruptness between the clean and distorted sector in the inlet Pt profile as well as the circumferential extent of the distorted sector affect distortion transfer and generation through a transonic fan. Simulations on two …

The Effects Of Dialogic Reading On The Oral Language Ofâ Diverse Kindergarten Students, Abigail Figgins

Theses and Dissertations

The purpose of this study was to determine if dialogic reading involving diverse kindergarten students would significantly affect narrative language. Various studies have corroborated the effectiveness of dialogic reading instruction on the expressive vocabulary of monolingual children. However, few studies have examined oral narrative language outcomes, especially with diverse students. A total of 142 kindergarten students were randomly assigned to a treatment group or control group. Each child in the treatment group received 14 weeks of whole-class dialogic reading instruction from their kindergarten teacher two times per week for 20 minutes each session in their classroom. The dialogic reading program …

Mechanisms For Improvement Of Key Mechanical Properties In Polymer Powder Bed Fusion Processes, Clinton Spencer Abbott

Theses and Dissertations

The purpose of this work is to understand the reasons for varied mechanical properties among three polymer Powder Bed Fusion (PBF) Additive Manufacturing (AM) processes. Parts for this work were manufactured from Polyamide 12 (PA12) using the Laser Powder Bed Fusion (L-PBF), Multi-Jet Fusion (MJF), and the recently developed Large Area Projection Sintering (LAPS) processes. Previous works have shown that LAPS parts demonstrate significantly higher density, ductility, and toughness than parts from the L-PBF and MJF processes. A hot isostatic pressing (HIP) treatment was developed to reduce porosity in L-PBF and MJF parts and determine if increasing part density would …

Using Connections To Make Predictions On Dynamic Networks, Rebecca Dorff Jones

Theses and Dissertations

Networks are sets of objects that are connected in some way and appear abundantly in nature, sociology, and technology. For many centuries, network theory focused on static networks, which are networks that do not change. However, since all networks transform over time, static networks have limited applications. By comparison, dynamic networks model how connections between objects change over time. In this work, we will explore how connections in dynamic networks change and how we can leverage these changes to make predictions about future iterations of networks. We will do this by first considering the link prediction problem, using either Katz …

Statistical Properties Of 2d Navier-Stokes Equations Driven By Quasi-Periodic Force And Degenerate Noise, Rongchang Liu

Theses and Dissertations

We consider the incompressible 2D Navier-Stokes equations on the torus driven by a deterministic time quasi-periodic force and a noise that is white in time and extremely degenerate in Fourier space. We show that the asymptotic statistical behavior is characterized by a uniquely ergodic and exponentially mixing quasi-periodic invariant measure. The result is true for any value of the viscosity ν > 0. By utilizing this quasi-periodic invariant measure, we show the strong law of large numbers and central limit theorem for the continuous time inhomogeneous solution processes. Estimates of the corresponding rate of convergence are also obtained, which is the …

Conceptualizing Parental Support In K-12 Online Education, Courtney N. Hanny

Theses and Dissertations

External support, such as that provided by parents, plays an important role in helping students in K-12 online education engage in their education and obtain academic success. The Academic Communities of Engagement (ACE) framework has been proposed as one way of conceptualizing the communities that support students, including the roles that parents and guardians play. Research studying parental support in online education could benefit from the structure offered from the ACE framework, but, due to the framework's novelty, it has not been widely applied in research. The first article in this thesis sought to use the ACE framework to synthesize …

Stabilizing Controlled Systems In The Presence Of Time-Delays, Isaac Becker Pardo

Theses and Dissertations

A dynamical system's state evolves over time, and when the system stays near a particular state this state is known as a stable state of the system. Through control methods, dynamical systems can be manipulated such that virtually any state can be made stable. Although most real systems evolve continuously in time the application of digital control methods to these systems is inherently discrete. States are sampled (with sensors) and fed back into the system in discrete-time to determine the input needed to control the continuous system. Additionally, dynamical systems often experience time delays. Some examples of time delays are …

Parental Perceptions Of Elementary Aged Children Learning To Code, David Daniel

Theses and Dissertations

Little research has been conducted to understand the role that parents play in children learning to code even though coding has become a necessary skill for students to successfully study STEM (Science, Technology, Engineering, Math) subjects. After identifying five factors that would influence parental perceptions, we developed a survey and administered it to parents of elementary aged children. We validated the survey using a confirmatory factor analysis and structural equation modeling. To be considered valid, factors needed to meet three of the following four fit statistics: RSMEA < 0.08, SRMR < 0.08, CFI > 0.9, TLI > 0.9. Items needed to have a factor loading > 0.3 with a …

The Caregiver's Conflict: The Toll Of Death And Dying On Nurses' Mental Health And Wellbeing, Madison Brown

Student Works

A major responsibility for nurses is caring for patients during the end-of-life process, as well as helping families and patients cope with the death and dying process. It is well known that death and dying greatly impacts families, but little holistic research has been done on how death and dying impacts nurses’ mental and emotional wellbeing. Using databases Google Scholar, Web of Science, and EBSCO, 14 articles were analyzed regarding the impact of death on nurses’ mental health. Results show that the age of a patient plays a bigger role on death impact than nursing specialty does, as younger patients’ …

Implementation Of A Genome-Wide Survey Of Induced Mutations To Identify Agronomically Valuable Variants In Chenopodium Quinoa, Andrew Alarcon Parker

Theses and Dissertations

Quinoa has been utilized for millennia in the Andes region of South America as a nutritious and hardy food crop. In recent years interest in quinoa has grown as need increases for an alternative to traditional cereal crops that can tolerate marginal environments while offering superior nutrition. Growers outside the Andes have experienced several complications adopting quinoa, including undesirable secondary metabolites, poor yield, lodging, and height inconsistency. Unfortunately, access to native ecotypes for crop improvement is limited, and desirable traits are difficult to introduce into available quinoa cultivars because of its allotetraploid genome and tendency to self-pollinate. A genome-wide survey …

Systems Engineering Of The Global L-Band Observatory For Water Cycle Studies, James Nathan Smith

Theses and Dissertations

The Global L-band Observatory for Water Cycle Studies (GLOWS) is designed as a follow-on to the Soil Moisture Active Passive (SMAP) observatory launched in 2015. While GLOWS is essentially copying many aspects of the SMAP mission, a key change has been made in the antenna technology. SMAP uses a reflector antenna and to reduce mission costs GLOWS uses a metamaterial lens antenna. This type of antenna is less efficient, so it must be proven that GLOWS can achieve the same uncertainty levels in soil moisture measurements as SMAP. In this work, a unified framework for modeling and analyzing GLOWS' ability …

Critical Incidents In Sustaining A Behavior Management Level System With Special Education Students In A Self-Contained School, Stephanie Johnson

Theses and Dissertations

Level systems provide systematic support for teachers and students who need additional behavior support. The purpose of this study was to evaluate the perspectives of faculty members from a self-contained school, for special education students with severe behavior needs, which has sustained the use of a school-wide, behavior management level system for nearly 30 years. A total of 11 faculty members were interviewed using the critical incident technique, a qualitative methodology used as an exploratory tool in early stages of research. Interviews detailed the observable behaviors and specific events, critical incidents, that helped or hindered the sustainability of their school's …

Thalamic Shape Abnormalities Differentially Relate To Cognitive Performance In Early-Onset And Adult-Onset Schizophrenia, Derin J. Cobia, Chaz Rich, Matthew J. Smith, Pedro Engel Gonzalez, Will Cronenwett, John G. Csernansky, Lei Wang

Faculty Publications

Early-onset schizophrenia (EOS) shares many biological and clinical features with adult-onset schizophrenia (AOS), but may represent a unique subgroup with greater susceptibility for disease onset and worsened symptomatology and progression, which could potentially derive from exaggerated neurodevelopmental abnormalities. Neurobiological explanations of schizophrenia have emphasized the involvement of deep-brain structures, particularly alterations of the thalamus, which have been linked to core features of the disorder. The aim of this study was to compare thalamic shape abnormalities between EOS and AOS subjects and determine whether unique behavioral profiles related to these differences. It was hypothesized abnormal thalamic shape would be observed in …

Aiding Semantic Memory Creation With Navigational Context, Thomas Benjamin Lyle Wasden

Theses and Dissertations

While we have traditionally understood the hippocampus to be involved in memory and navigation, it also appears that it has a role in language processing, creation and prediction. An obvious explanation for this is that language is impossible if linguistic signs cannot be remembered and retrieved. Because linguistic signs are definitionally biologically neutral or arbitrary, we must use the brain's apparatus for learning and storing information from the external world to store and retrieve them. Although plausible, this explanation fails to take into account the hippocampus' role in navigation as a contributing element in the processing, storage and retrieval of …

Computationally Assisted Nmr Crystallography: A Path To Unusually High-Resolution Crystal Structures, Luther Wang

Theses and Dissertations

Crystallography has traditionally been studied by diffraction methods involving X ray or neutron radiation. These methods have some limitations, from requiring the substance under study to form single crystals to the limited ability of X rays to locate hydrogen atoms. While neutron radiation can characterize hydrogens, it is expensive, not readily available and has its own particular limits on resolution. It this dissertation, it is demonstrated that NMR is extraordinarily sensitive to atomic positions, with variations of mere tens of femtometers creating statistically distinguishable chemical shift changes. To date, no other means of measurement can detect structural changes at this …

Families In The Sky: Investigating The Population Structure Of Pinus Longaeva, Samuel Arnold Decker

Theses and Dissertations

In the Western United States, the Great Basin is a geographic feature that is home to a variety of unique species, including Great Basin bristlecone pine (Pinus longaeva, PILO). P. longaeva is well known for the age of some of the trees, some of which are over 4000 years old. In this study 17 microsatellite markers (simple sequence repeat, SSR) are identified and used to genotype a selection of 480 individuals spread across 24 PILO populations and 60 individuals divided equally between 2 outgroup species, Pinus aristata and Pinus flexilis. One population of PILO, HMW, shows more genetic similarity with …

Comparative Sequence Analysis Elucidates The Evolutionary Patterns Of Yersinia Pestis In New Mexico Over Thirty-Two Years, M. Elizabeth Warren

Theses and Dissertations

Yersinia pestis, a gram-negative bacterium, is the causative agent of plague. Y. pestis is a zoonotic pathogen that occasionally infects humans, and is endemic in the western United States. History gives evidence of three main plague pandemics. The first, originating in Egypt in 541AD, is known as the Justinian plague. The second, perhaps most well-known, is thought to have emerged in 1347AD in China, and is called the Black Death. The third, and current plague pandemic, also emerged in China in 1855. In 1899, Y. pestis was established in California, and the plague in other parts of America evolved from …

Aligning Educational Practice With Institutional Purpose: A Case Study Of High Impact Practices In Higher Education, Jaynie Celeste Mitchell

Theses and Dissertations

This study examines how one college in a large private university sought to benefit its students by implementing a program of faculty-mentored, co-curricular high impact practices (HIPs). This qualitative single case study uses confirmatory and exploratory document analysis to examine how an educational leader translated institutional purpose via unit leaders and program managers into the educational practice of faculty mentors. The researcher found stronger and weaker areas of alignment of institution purpose to educational practice across a systems theory-based purpose-to-practice continuum. Variety in the concentration of themes across the data may be due to how these themes were emphasized in …

Reading Fluency Development And Science In A Fourth Grade Dual Language Immersion Classroom, Talia A. Casares

Theses and Dissertations

Students from dual language immersion (DLI) classrooms are required to learn the language through content. However, some students have not yet developed these abilities by the time they start fourth grade. Thus, to fully comprehend content such as science, students need stronger reading and writing abilities in the second language (L2). To help stakeholders have a better understanding on how to effectively help students throughout this process, this action research studied the effectiveness of integrating literacy with science and mobile assisted language learning (MALL). Findings showed that the integrations of literacy, science and MALL were effective with statistically significant results …

How She Sleeps At Night, Alexandra Malouf

Theses and Dissertations

How She Sleeps at Night is a collection of lyric poetry constellated around experiences of disability, trauma, and womanhood. A critical essay introduces the collection by elucidating the experiences and theoretical underpinnings that shaped the body of these poems. The introductory essay distills the principles that informed my cardinal poetic goals as I wrote: to create poems that can be read again and again over a lifetime, which connect with readers' common humanity, and which acknowledge the nuances and complexities of being alive.

Satanic Injustice: A Pentadic Rhetorical Analysis Of State Of Arkansas V Echols And Baldwin, Shaelee Bryne Erickson

Theses and Dissertations

Injustice continues to be a highly discussed topic in many scholarly disciplines, including rhetoric and law. Scholars in both fields are exploring how language in legal discourse contributes to systematic inequality, discrimination, and unfairness--racial and nonracial. This rise in scholarly interest correlates with civic concern, as there have been many court cases in the last few decades that have captured public and media attention. One of these cases involved Damien Echols and Jason Baldwin, two teenage boys who were convicted for murdering three 8-year-old boys. Echols and Baldwin were tried during the late 20th-century satanic panic, a well-documented social phenomenon …

Development Of Compact Phased Array Receivers On Rfsoc Prototyping Platforms, Jacob Bartschi

Theses and Dissertations

The continual increase of wireless technologies in the world has motivated the use of phased arrays to mitigate radio frequency interference (RFI). There are many methods of performing beamforming for RFI rejection, but they are traditionally physically large and complicated solutions. Phased arrays need to be shrunk and made cheaper for them to see widespread use. This work presents several compact phased array receivers for different applications. The first part of this thesis presents a software GPS processor for a digital beamforming GPS receiver. The receiver is small enough to be flown on drones and enables GPS signals to be …

Gas Phase Structure Characterization Of Host-Guest Systems Using Ion Mobility Spectrometry, Jamir Shrestha

Theses and Dissertations

This dissertation focuses on the investigation of gas-phase characteristics of cucurbituril host-guest systems using ion mobility spectrometry (IMS) and related techniques. Collision cross-sections (CCS) of alkylammonium complexes of cucurbit[n]uril (CB[n]) are measured to understand the allosteric interactions that induce conformational changes in the complex in the presence of metal cations on one of the portals of the cucurbit[6]uril (CB[6]) host. Cationic species on one CB[6] rim sterically force longer linear alkylammonium guests out of the cucurbituril cavity during complex formation. Similarly, rigid cucurbituril-metal complexes were studied using IMS to demonstrate the effect of long-range ion-neutral interactions on the gas phase …