Digital Commons Network^™

Assessing Threats To Plant Populations: Linking Pollinator Differences To Patterns Of Plant Fitness And Population Genetics, Rieka Yu

Dissertations

Land use change is a major driver of biodiversity loss and consequently has led to the loss of genetic diversity in many plant populations due to declines in population sizes and an increase in spatial isolation. However, not all plant populations respond similarly to land-use change, suggesting there are additional mechanisms mediating plant population genetic patterns. Here, I examine the role of pollinators as this mediating factor. In Chapter 1 I conducted a meta-analysis to investigate how different types of pollinators drive changes in gene flow for plant populations in disturbed habitats, finding that different types of pollinators mediate different …

Role Of Ripk3 In The Pathogenesis Of Tet2 Mutant Hematopoietic Malignancies, Kanak Joshi

Dissertations

Hematopoiesis is dynamically controlled by an epigenetic landscape that regulates gene transcription. Ten-eleven translocation 2 (TET2) is a Fe2+ and α-ketoglutarate (α-KG)-dependent dioxygenase that regulates the transcriptional status of genes associated with hematopoietic stem cell self-renewal and multiple stages of lineage commitment and differentiation. TET2 mutations are commonly detected in almost all types of hematopoietic malignancies, including myeloproliferative disorder, acute myeloid leukemia, and peripheral T-cell lymphomas. In most cases, TET2 is a founder mutation that occurred in hematopoietic stem/progenitor cells (HSPCs). The mutant HSCs undergo clonal expansion and evolution with the accumulation of additional mutations for malignant transformation. Microbial-stimulated inflammatory …

It's Nerve Racking: The Lived Experiences Of New Graduate Clinical Care Nurses Using Simulation As Part Of An Orientation Program, Robert L. Kerner Jr.

Dissertations

The nursing profession has adopted high fidelity simulation (HFS) on the premise that it provides suitable opportunities for experiential learning in a non-threatening environment and it will improve clinical skills and critical thinking through repetition and reflective practice. Numerous quantitative studies have examined the effect of HFS on skill acquisition, critical thinking and teamwork, predominantly with experienced clinicians. The voice of the learner has been conspicuously absent in the discussion. The phenomenon of interest in this study was the experience of simulation for new graduate nurses. The participants were recruited using a purposive technique, and each underwent a comprehensive interview, …

Sensing The Rhizosphere: Microbial Transcriptome Responses To Root Exudates And Redox-Active Metabolites, Ankita Bhattacharyya

Dissertations

The term “rhizosphere” describes the dynamic interface between plant roots and soil influenced by root exudates. It is a hotspot of microbial activity, plant-microbe, and microbe-microbe interactions. Distinct variations in bacterial diversity are thought to be driven by plant root exudates. However, the molecular details of these processes still remain unclear.

I addressed this gap by focusing on two strains, Pseudomonas synxantha 2-79 and Burkholderia lata 383, representing diverse groups of Gammaproteobacteria comprised of species with environmental, agricultural, and medical significance. In the first part of this project, we used a combination of metabolomics and RNA-seq to characterize transcriptome responses …

Peruvian Musical Elements In Selected Peruvian Piano Compositions By Duncker Lavalle, Ayarza De Morales, And E. Valcárcel Arze, Gonzalo Aguilar

Dissertations

This research paper focuses on Peruvian musical elements used by three Peruvian composers active in the twentieth century: Luis Duncker Lavalle (1874-1922), Rosa Mercedes Ayarza de Morales (1881-1969), and Edgar Valcárcel Arze (1932-2010). The analysis is centered upon three solo piano works: Duncker’s Leggenda Appassionata (published 1964), Ayarza’s Marinera y Resbalosa (n.d.), and Valcárcel’s Cuatro Piezas Infantiles (1963). These composers represent a cross section, not only chronologically, but also geographically. Relevant Peruvian traditional music (such as mestizo music; Arequipan yaraví; música criolla: marinera, zamacueca; cueca chilena; as well as music of Cuzco and Puno—including from …

Effect Of Exercise Training On Circulating Cancer-Associated Immune Cells In Breast Cancer Patients, Lea Haverbeck Simon

Dissertations

Breast cancer (BC) is one of the leading causes of cancer deaths among females. It is well known that the presence of a tumor decreases robust anticancer immunity via immune-modulation and enhanced immunosuppression through a process called cancer immunoediting. However, it has yet to be determined if exercise-based rehabilitation can elevate the peripheral anticancer immune profile and reduce myeloid-derived suppressor cell (MDSC) mediated immunosuppression. Purpose: To assess the effects of a 12-week prescribed, individualized, supervised exercise-based rehabilitation program on selected circulating immune cells in BC patients at the University of Northern Colorado Cancer Rehabilitation Institute. Methods: 16 female BC patients …

Physiological, Ecological, And Microbial Factors Shaping Thermal Tolerance And Performance In Ectothermic Vertebrates, Jason Warren Dallas

Dissertations

Temperature represents a major driving force in biology as it influences essential functions across multiple levels of biological organization. The role of temperature is especially important for ectothermic animals, whose biotic processes are dependent on both body and environmental temperature. Assessing the relationship between temperature and organismal performance represents an important research direction as temperatures continue to warm under anthropogenic climate change. Chapters two and three are focused on a recently colonized population of the invasive Mediterranean House Geckos at the northern edge of their invasion front. These chapters examine the ecological and physiological factors that enable these lizards to …

A Qualitative Case Study Into The Electronic Correspondence Between Fifth-Grade Students And Their College Mentors, Kevin Pribnow

Dissertations

The ability to navigate emerging technologies is necessary for social and economic participation in the world. Research shows that children from privileged households receive the support needed to develop digital literacy skills, while children from families with lower socioeconomic status do not receive this support. It is the responsibility of schools to address this participation gap by bringing digital literacies into classrooms. The affordances of new technologies make it easier than ever for teachers to provide authentic literacy experiences for their students. This qualitative case study examined an authentic, digital literacy experience during a virtual pen pal correspondence between fifth-grade …

Visual Circuitry In Adaptive Behavior: Extraction Of Complex Visual Image Information By Arrays Of Non-Image Forming Eyes, Thomas Kipp Halladay Groves

Dissertations

A complete understanding of how neural circuitry underlies the detection and integration of visual cues continues to elude researchers in the 21st century. Since the dawn of life on earth, light has exerted enormous selective pressure on all living organisms. Visual systems represent one of the most common sensory systems in existence, with significant homologies among elements of these systems, such as photopigments and developmental genes. Offering nearly unmatched single cell access at all levels of its nervous system, the European medicinal leech (Hirudo spp.) is an excellent system in which to identify behaviorally relevant neuronal circuits. Hirudo evolved discrete …

Reactive Oxygen Species And Weak Magnetic Fields: Unraveling The Mechanisms Of Planarian Regeneration And Tissue Growth, Luke James Kinsey

Dissertations

Reactive oxygen species (ROS) play a critical role in basic cellular behaviors such as apoptosis, proliferation, and differentiation. These molecules once thought to be harmful byproducts of metabolism, are also required for many complex and ubiquitous processes like wound healing, development, and regeneration. This study investigates the influence of ROS on planarian regeneration, with a particular focus on ROS dynamics in stem cell-mediated tissue growth. Data reveal that modulation of ROS levels leads to changes in cellular behaviors and tissue growth outcomes. Inhibition of ROS accumulation blocks stem cell proliferation and tissue growth, preventing planarian regeneration, while partial ROS accumulation …

A Review Of The Role Of Anxiety In Diagnosis Of Children And Adolescents With Autism Spectrum Disorder: A Paradigm Shift In Conceptualization And Diagnosis, Evan Wahlquist

Dissertations

Early evidence of co-occurring anxiety symptoms in children and adolescents with autism spectrum disorder (ASD) dates back to the first descriptions of ASD by Leo Kanner (1943) and Hans Asperger (Frith & Mira, 1992). While current research has identified anxiety disorders as one of the most prevalent co-occurring disorders in children and adolescents with ASD, little is known about the nature of the relationship between these disorders. In an effort to explain these high prevalence rates, recent research has started to investigate the relationship between these two disorders. To join these efforts, this clinical research project explored the role of …

The Inevitabilities Of Activist Teaching: Exploring The Experiences Of An Activist Latinx Teacher In United States Public Schools After The Coronavirus Disease Of 2019 Pandemic, Simon Lewis Cropp

Dissertations

United States public schools post-Coronavirus Disease 2019 are experiencing a crisis as teachers leave the profession in record numbers, and enrollments in teacher preparation programs across the country continue to decline (Pelika, 2022). Simultaneously, Latinx students’ populations continue to grow while Latinx educators struggle to stay in the teaching profession and for the first time in decades, the achievement gap between Latinx students and their White peers has begun to grow (Amos, 2020; Bailey et al., 2021). Latinx teachers play a crucial role in helping Latinx students experience success in public schools, but a growing sub-population of resentful White Americans …

Oikophilia: Relationships Among Life, Human Life, And Place In School Communities And Their Expressions In Curriculum, Mandi Leigh

Dissertations

This naturalistic, non-experimental inquiry explored relationships among life, human life, and place in school communities along with their expressions in school curriculum. I used educational criticism and connoisseurship to richly describe, interpret meaning, evaluate significance, and discern thematics surrounding relationships and how those relationships were expressed in the curriculum. Postmodern ecology provided the framework for acknowledging ecological precarity and performing the critical, as in essential, work of deconstructing what harms life that could be reconstituted as nourishment. The first study question was: What relationships exist among life, human life, and place in school communities? To answer the question, ecological data …

Exploring The Effects Of Cannabidiol On Psychological Health, Cognitive Function, Neural Health, And Natural Killer Cells, Arjun Ramani

Dissertations

Cannabidiol (CBD), a non-psychotropic cannabis sativa derivative, is gaining attention as a potential promotor of neurological function and cognitive health and as a potential anti-inflammatory compound, although these claims lack evidence-based support from the scientific community. The purpose of this study was to determine whether 8 weeks of 2 doses, 40 mg (CB40) or 20 mg (CB20), of CBD containing beverages will improve psychological health, cognitive function, neural health as well as NK and NKT cell quantity and NK cell function when compared to a control vehicle beverage (CBDV) and a calorie-matched placebo beverage (PLAC) in a double-blind, randomized, placebo-controlled, …

Kukama Radio: The Politics And Aesthetics Of Indigenous Media In Peruvian Amazonia, Gabriel Torrealba Alfonzo

Dissertations

This dissertation is about the political and aesthetic dimensions of Indigenous media in Peruvian Amazonia. It explores how Kukama media-makers use aesthetic mastery to engage in three key political fields in Amazonia: indigeneity, historicity, and environmentalism. I specifically examine the audiovisual discourses and media-making practices coming from an Indigenous radio station called Radio Ucamara, located in the town of Nauta in Northeastern Peru (Loreto region). Drawing on place-based ethnography and digital research methods, I analyze the way this radio station instrumentalizes multiple digital and non-digital media forms to make visible (and also audible) their identities, violent histories, and cosmological worlds …

Acting Locally: Vegetable Gardening In Southern Illinois, Aimee L. Trojnar

Dissertations

This dissertation explores the everyday practice of home and community vegetable gardening in a small southern Illinois city. The project engages with questions of how diverse elements of practice interact over time in the development of both gardens and gardeners, dwelling particularly on how the material agency of nonhumans contributes to what emerges. Combining a broad investigation of societal influences and constraints involved in gardening practices with a granular focus on material interactions in the garden, I consider the kinds of relationships individuals forge with the nonhuman environment in a modern, Western context and how they do so. Understanding such …

Exploring Biotic And Abiotic Constraints On Competition For Signal Space Within Birdsong Communities, Joanna M. Sblendorio

Dissertations

With the acceleration of climate change and the conversion of natural ecosystems to human-dominated landscapes, there is concern for the persistence of biodiversity amid novel biotic and abiotic factors. An important outcome of shifting species distributions and environmental disturbance is the formation of novel assemblages. For animals that vocalize for mate attraction and resource defense, the introduction of new species into communities may alter availability of acoustic space for signaling and affect detection of signals by conspecifics. Thus, to minimize signal overlap, species should partition signal space and thereby inhabit well-defined acoustic niches. Yet mixed evidence exists regarding signal space …

A Rudimental Drumming Vocabulary Applied To The Folk Music Of Argentina, Justin Sherrod

Dissertations

This dissertation examines the methods and approaches used by Argentine percussionist Mr. Sebastian Hoyos to incorporate rudimental drumming into the composition Soy de Salta: Suite para percusión criolla y orquesta. The study demonstrates the steps taken to employ Argentinian folk music content through four folk styles: Baguala, Zamba, Chacarera, and Carnavalito. The bombo legüero, one of Argentina's most well-known and essential folk percussion instruments, plays a supportive and dominant role in Soy de Salta, introducing rudimental components into the music. This original research therefore addresses rudiments, variations of rudiments, and simple and complex writing styles for the snare drum …

Neurodiverse Perceptions Of Inclusivity In The Workplace, Shannon Lively

Dissertations

The increase in neurodivergent professionals in the workplace has led to a significant need for researchers to examine neurodiversity inclusion in the workplace. Research has portrayed workplace inclusion as the perception that the individual is a valued member of a workgroup through satisfactory experiences of belongingness and uniqueness. Through semi-structured interviews with 20 neurodivergent professionals, this study examined how they view inclusion, exclusion, and cope with exclusion in the workplace. The neurodivergent participants identified six inclusion and six exclusion categories. Results were largely consistent with previous inclusion research, however, one novel category, flexible accommodations, suggests the importance of considerate accommodations …

An Analysis Of Capital Flow To Construct An Economic Typology In A Comparative Case Study Of Three Ancient Cities: Third Kingdom Of Ur, New Kingdom Of Thebes, And Classical Athens, Darrell Gremillion

Dissertations

This dissertation adds to the literature on Economic Development through the development of a Typology of Economy applicable to the earliest cities. Understanding the evolution of these early economies is a crucial step in understanding the past to assist in the establishment of policies for the future. This is especially important in the light of the environmental and sustainability challenges facing the globe today.

The cities in the comparative case study include the Third Dynasty of Ur in Mesopotamia, the New Kingdom of Thebes in Egypt, and Classical Athens in Greece. These cities are chosen for the case study for …

Positive Emotions And Sexual Desire Among Healthy Women, Elizabeth J. Brough

Dissertations

Sexual desire disorders are highly prevalent, account for a significant proportion of sexual problems, and affect important aspects of women's lives. Sexuality research has traditionally focused on dysfunction models, rather than human strengths approaches. Recently, positive psychologists have developed models and methods to examine human strengths. This study used Frederickson's Broaden and Build model to examine links between positive emotions and sexual desire among women. Positive emotions words were examined relative to sexual domains frequently cited in clinical studies, and compared to sexual cognitions which have been linked to positive sexual outcomes in past studies.

The Experiences Of Black American Older Adults Managing Pain: A Nursing Ethnography, Sheria G. Robinson-Lane

Dissertations

Pain can negatively affect quality of life for Black elders. They are less likely to report pain concerns and have voiced pain needs adequately met. To better understand the pain management experiences and concerns of Black elders, an ethnographic study was completed within an urban, low-income, elder housing facility.

Improving Pediatric Asthma Outcomes Through Pictorial Asthma Action Plans, Julia Donovan

Dissertations

Problem: Asthma is the leading chronic disease of children and the leading cause of childhood emergency department (ED) visits, hospitalizations, and missed school days. Asthma action plans (AAPs), including photographs or pictures of asthma medications, symptoms, triggers, and devices, have improved parents’ understanding of their child’s asthma and have increased their comfort level in caring for their child.

Methods: An interventional pre-post study with a mixed-method research design, at a large, urban, primary care pediatric clinic with two locations, evaluated the effectiveness of a pictorial AAP on a child’s asthma control. A pictorial AAP was provided, and a childhood asthma …

The Impact Of Collaboration, Problem Solving, And Creativity On Computer Programming Education For Middle School Girls, Amanda Meek

Dissertations

Despite high scores and abilities, girls lose interest in science and math throughout middle school. According to the Bureau of Labor Statistics, jobs in the computer science research field will grow 19% by 2026; however, only 18% of the bachelor’s degrees in computer science are earned by women in the United States (ComputerScience.org, 2021). New technology and inventions are being created without the benefit of more diverse perspectives and input from females. There is a need to engage girls and maintain their interest throughout middle school and beyond. Additional research needs to be conducted about the impact and best practices …

Family Dining: Food And Drink In The Sopranos – A Gastrocritical Approach, Lisa Davies

Dissertations

This thesis uses gastrocriticism to explore food and drink in the 86 episodes of the long-form narrative HBO television series The Sopranos. Gastrocriticism is an emerging branch of literary criticism that draws on scholarship from a range of disciplines such as sociology, anthropology and cultural studies. A deeper understanding of the series was gained by using a structured framework of enquiry to explore narrative, setting, characterisation and genre through the lens of food and foodways. The Sopranos is a story of an Italian-American crime family and food is abundant in the series and bound up with the identity of …

Hippocampal Volume And The Detection Of Mild Cognitive Impairment In An Older Adult Population: Assessing Performance On Cognitive Screeners Administered In-Person And Electronically, Kristen Fabrizi

Dissertations

The present study investigated how performance on in-person and electronic neuropsychological assessment measures predicted subcortical hippocampal volume and cognitive decline consistent with mild cognitive impairment. It was hypothesized that the Montreal Cognitive Assessment would display better predictive strength than the Cogstate Brief Battery when evaluating subcortical hippocampal volume measured via structural magnetic resonance imaging. It was further hypothesized that the Montreal Cognitive Assessment would be more sensitive to predicting group membership to the diagnostic classification of mild cognitive impairment compared to the Cogstate Brief Battery. The sample included 445 older adult participants selected from the Alzheimer’s Disease Neuroimaging Initiative 3. …

Softening Corners: How A Carefully Considered Hospitality Operation Impacted An Educational Institution, Jennie Moran

Dissertations

Enter quickly, as I am afraid of my happiness!

(Derrida, 2000, p.131)

This research project is an attempt to bridge the gap between the philosophical ideals of hospitality and the hospitality industry, by examining how a carefully considered hospitality operation impacted an educational institution over the course of eight years. The aim of this study is to demonstrate that the application of the philosophical ideals to a commercial hospitality setting yielded profoundly positive results. The primary research was compiled by the author conducting a case study of her own food business, Luncheonette which was located in the National College of …

Exploring The Fifth Quarter: An Enquiry Into Offal Eating In Contemporary Irish Food Culture, Its History, And Its Future, Niall Toner

Dissertations

Animal offal and organ meats seem to have all but disappeared from domestic cuisine in Ireland, despite the recent renaissance in the country’s food culture. This thesis has examined the extent and nature of the consumption of these comestibles in contemporary Irish food culture, and the perceived decline in offal’s popularity in Ireland in the past fifty years. It also sought to discover whether offal and organ meats might have a place in the future of our cuisine, and whether the consumption of more offal and organ meats in Ireland might contribute towards a more sustainable food production system, and …

Professional Development For Classified Managers Within The Business Services Departments At California Public School Districts, Juliet Castorena Orozco

Dissertations

Purpose. The purpose of this Delphi study was to identify and describe professional development topics required to prepare classified managers in California public school district business services departments as effective leaders as perceived by a panel of experts. This study also sought to identify the degree of importance of each professional development topic and the best strategies to address those topics as perceived by a panel of experts.

Methodology. A Delphi research design was used to identify and describe professional development strategies necessary to prepare classified managers in the business services division of California public school districts. The Delphi panel …

The Skin I’M In: A Critical Content Analysis Of Picture Books Written By Black Authors, Angela Latrece Justice

Dissertations

This study seeks to explore the experiences of Black male protagonists in picture books. The following question guided this study: How do Black authors demonstrate a commitment to social justice? The theoretical framework that guides this study is Critical Race Theory (CRT), which aids in understanding how Black authors use experiential knowledge to represent experiences that challenge dominant ideologies about Black males. The sample consists of 20 pictures books all written by Black authors and published within the United States from 2018 to 2021. The deductive and inductive approaches to critical content analysis is used as it is effective for …