Digital Commons Network^™

A New Species Of Crioprosopus Audinet-Serville, 1834 From Costa Rica And Panama (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini), Bryan K. Eya

Insecta Mundi

Crioprosopus baldwini Eya (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini), sp. nov., from Costa Rica and Panama, is described. An amendment to the key to species of Crioprosopus Audinet-Serville, 1834, as presented in Eya (2015), is provided along with illustrations of the key characteristics to differentiate C. baldwini from other species.

Effects Of Pesticide Residue Accumulation On Honey Bee (Apis Mellifera L.) Development And Implications For Hive Management, Jennifer Weisbrod

Department of Entomology: Dissertations, Theses, and Student Research

Honey bee (Apis mellifera L.) colonies face annual declines of 40% in the United States. Pesticides play a role in these losses. Pesticide residues picked up from the environment as well as beekeeper-applied compounds may accumulate within the hive. The effects of pesticide accumulation in comb on bee health mitigation of accumulation have not been well-studied. To examine pesticide exposure on health and development, chlorothalonil and the amitraz metabolite N-(2,4-dimethylphenyl) formamidine (DMPF), two pesticides found in hive products, were applied to brood comb. Queen bees were caged onto treated and control comb and egg laying and development were assessed. …

The Effects Of Temperature On Evacuation Rates And Absorption Efficiency Of Flathead Catfish, Zach Horstman

School of Natural Resources: Dissertations, Theses, and Student Research

Knowledge of fish gastric evacuation rates are a necessary component for both field and laboratory studies when trying to understand feeding rates, modeling energy budgets, and understanding trophic dynamics of aquatic ecosystems. Many freshwater fish encounter a broad range of environmental temperatures across life history stages, but the mechanistic link between temperature and physiological processes often remains poorly understood. We designed three recirculating aquatic systems capable of rearing Flathead Catfish Plyodictis olivaris in order to quantify gastric evacuation rates and gross energy absorption at three temperatures (17º C, 22º C and 25º C). We examined the relationship between temperature and …

In Hot Water: Influence Of Multiple Stressors On Thermal Tolerance Of Fathead Minnows Pimephales Promelas, Alexander Engel

School of Natural Resources: Dissertations, Theses, and Student Research

Freshwater aquatic systems around the globe are often subjected to physical, biological, and chemical alterations to support societal needs. The Great Plains contains one of the largest agricultural industries in North America, but its productivity has ecological repercussions for adjacent freshwater ecosystems. Specifically, the dependency on surface water irrigation and application of chemical treatments has altered the thermal and chemical composition of freshwater ecosystems throughout the region. Stressors such as elevated temperatures, altered flow regimes, increased contaminant loads affect the physiology and behavior of fishes and can lead to long-term population effects. We examined thermal tolerance of Fathead minnows Pimephales …

Going The Distance: A Case Study Of One Community College's Journey Across The Digital Divide, Michael Robert Jolley

Department of Educational Administration: Dissertations, Theses, and Student Research

Rural communities throughout the nation continue to lag their urban and suburban peers in access to high-speed internet service. This digital divide affects rural populations in a myriad of ways, but access to higher educational opportunities may be most problematic. While the promise of technology to level the field for rural students continues to offer hope, the scarcity of broadband service lingers. This qualitative instrumental case study explores how one exceptional rural community college in the Great Plains developed the capacity to deliver distance education programming. The study relies upon Rogers's theory of diffusion of innovations to validate the extent …

Research Tools And Their Uses For Determining The Thermal Inactivation Kinetics Of Salmonella In Low-Moisture Foods, Soon Kiat Lau

Department of Food Science and Technology: Dissertations, Theses, and Student Research

The reputation of low-moisture foods as safe foods has been crumbling over the past decade due to repeated involvement in foodborne illness outbreaks. Although various pasteurization technologies exist, a majority are thermal processes and have not been well-characterized for pasteurizing low-moisture foods. In addition, the nature of a low-moisture food matrix introduces various experimental complications that are not encountered in high-moisture foods. In this dissertation, the development, building instructions, and characterization of various open source tools for studying the inactivation kinetics of microorganisms in low-moisture foods are described. The first tool is the TDT Sandwich, a dry heating device for …

Finite Population Corrections For Two-Level Hierarchical Linear Models With Binary Predictors, Steven Svoboda

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Answering social science research questions about clustered data necessitates collecting data using sampling schemes, which may result in hierarchical data structures. Hierarchical liner modeling (HLM) techniques are required to account for the interdependency of observations due to clustering. However, traditional HLM assumes the target population is infinitely large or near enough to infinitely large for practical purposes (i.e., the sample consists of less than 5% of the target population). Often times, the assumption of an infinitely large target population may not hold.

The current study was conducted in two separate phases using Monte Carlo simulation methods. First, the continuous predictors …

Conceptualizing Perceived Parental Communicated Acceptance During Parent-Child Religious Difference, Toni Morgan

Department of Communication Studies: Dissertations, Theses, and Student Research

Significant religious difference in the family has become increasingly prevalent in recent years (Pew Forum on Religion & Public Life, 2008; Pew Research Center, 2015). While religious difference is challenging for families to negotiate, the manner in which they communicate about it seems to be helpful in promoting positive outcomes (e.g., Colaner, Soliz, & Nelson, 2014; Hughes & Dickson, 2005). The purpose of this study was to conceptualize parental communicated (non)acceptance in the context of significant parent-child religious difference. To that end, I conducted interviews with 44 adults who identified a significant religious difference with their parent. The interviews also …

Learning From Those Who Served: Application Of Regression-Based Body Mass Estimation Methods To The Uss Oklahoma Population, Maxwell Rooney

Department of Anthropology: Theses and Student Research

Current methodologies in body mass estimation are lacking in accuracy when compared to the methods of sex, age, and ancestry estimation familiar to forensic anthropologists. For this reason, the practical application of body mass estimation remains underutilized, hindering the study of a potentially advantageous aspect of the biological profile.

This study highlights body mass estimation in a forensic context while taking the osteological paradox into account through the utilization of a unique population: the US military personnel killed on the USS Oklahoma during the Pearl Harbor attack on December 7, 1942. Because these individuals were similar in age (adults, age …

Job Embeddedness, Megan Paul

Umbrella Summaries

What is job embeddedness?

Job embeddedness refers to the extent to which employees are connected to their jobs through a social web. It includes three aspects, each of which is considered in light of the job or organization (“on-the-job embeddedness”) and the community (“off-the job embeddedness”): (a) links—the extent to which people have links to other people or activities, (b) fit—the extent to which their job and community are similar to or fit with the other aspects in their life space, and (c) sacrifice—what they would give up if they left, especially if they had to move to another city …

Some Economic Implications Of The Covid-19 Pandemic In Nebraska, John C. Beghin

Cornhusker Economics

It is now clear that the spread, mortality and morbidity impacts of the coronavirus pandemic are sizeable but extremely heterogeneous across multiple dimensions. Geography shows that places with lower human con-centrations (urban/rural divide) and away from main travel axes, such as major interstate highways and in-ternational airports, have a lower incidence of cases. Large urban centers with high human concentrations have been much disproportionally affected and with much higher mortality rates. Age and health status are equally important. Mortality increases dramatically for people 60 years old and older. People with comorbidi-ties (cardiovascular, obesity, diabetes, and others) are much more likely …

Impact Of Streambank Stabilization On Sediment Deposition And Erosion In Central Nebraska Streams, Matthew Russell

School of Natural Resources: Dissertations, Theses, and Student Research

Stabilization projects are increasingly used to mitigate the effects of anthropogenic streambank erosion, yet the effectiveness of these practices has been insufficiently monitored and assessed to date. Sound monitoring practices promote engineered effectiveness, in addition to allowing adjustments in implementation and maintenance to improve practices over time. However, current methods to quickly and efficiently quantify deposition and erosion within a stream continue to be costly and inefficient. Therefore, the objectives of this project were to 1) Measure streambank migration of three reaches at Cedar River in Nebraska, from 1993 to 2006 (pre-stabilization) and from 2006 to 2018 (post-stabilization) using aerial …

Diverse Aging And Health Inequality By Race And Ethnicity, Kenneth F. Ferraro, Blakelee R. Kemp, Monica M. Williams

Department of Sociology: Faculty Publications

Although gerontologists have long embraced the concept of heterogeneity in theories and models of aging, recent research reveals the importance of racial and ethnic diversity on life course processes leading to health inequality. This article examines research on health inequality by race and ethnicity and identifies theoretical and methodological innovations that are transforming the study of health disparities. Drawing from cumulative inequality theory, we propose greater use of life course analysis, more attention to variability within racial and ethnic groups, and better integration of environmental context into the study of accumulation processes leading to health disparities.

Smokers’ Reports On Receiving A Doctor’S Advice To Quit Smoking; Receiving The Advice Is More Prevalent Among Smokers With Crohn’S Disease Relative To Smokers With Ulcerative Colitis, Julia N. Soulakova, Le-Chu Su, Lisa J. Crockett

Department of Psychology: Faculty Publications

Receiving a doctor’s advice to quit smoking is an important predictor for improving smokers’ intentions to quit smoking and successful smoking cessation. We examined reports of smokers with Crohn’s Disease (CD) and Ulcerative Colitis (UC) regarding receiving a doctor’s advice to quit smoking in the past 12 months, and eval-uated the differences in the rates of receiving the advice between the CD and UC patients. The data were retrospectively reported by CD and UC patients (n = 453) who self-identified as current smokers in online assessments conducted by IBD Partners in the period from 2011 to 2014 in the USA. …

Vibrotactile Threshold Estimation In Neurotypical Children, Elizabeth Hoffman

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Experimental findings are limited concerning the vibrotactile sensitivity of the glabrous hand and perioral face in neurotypical children. Additional research examining vibrotactile detection thresholds (VDT) in neurotypical children would further understanding of tactile perception in children and help create a more robust understanding of somatosensory development across the lifespan. This research has applications in diagnostics for neurological disorders affecting vibrotactile sensation in the hands and face. The proposed study will use an adaptive single interval up-down threshold tracking algorithm to measure VDTs at 5, 10, 50, 150, 250, and 300 Hz for the glabrous hand and perioral face in a …

"You Have Witchcraft In Your Lips": Sensory Witchcraft In Shakespeare's Antony And Cleopatra And Macbeth, Hannah Kanninen

Department of English: Dissertations, Theses, and Student Research

Scholarship on witches and witchcraft within Shakespeare’s plays has been a popular subject for many scholars. But one of Shakespeare’s most famous characters has not yet been integrated into this scholarship: Cleopatra from Antony and Cleopatra. Although scholars have often noted her “witchiness,” none have argued for an interpretation of Cleopatra as a witch. This is because traditional definitions of witchcraft have not been able to include Cleopatra. In comparison, Lady Macbeth from Macbeth has often been cited as the fourth witch in the play. But this interpretation relies upon examining Lady Macbeth’s perceived masculinity, which subsequently also makes her …

No Association Between An Oxytocin Receptor Genetic Variant And Depressive Symptoms, Rachel Sisley, Grace Sullivan, Scott Stoltenberg

UCARE: Research Products

• Depression has the greatest impact on daily functioning capability of all diseases and adversely effects individuals globally (Flint & Kendler, 2014). • Human capital value of these losses has been about $40 billion dollars annually (Kessler, 2012). • Analysis of the genetic and biological systems associated with depressive symptoms, such as the oxytocin system, could lead to identifying risk variants and possible treatment development. • Genetic Variation in OXTR is associated with a variation in depressive symptoms including low selfesteem, pessimism, and low self-efficacy, etc. (Conner et al., 2018). • The A allele of the SNP rs53576 is considered …

Open Dynamic Interaction Network: A Cell-Phone Based Platform For Responsive Ema, Gisela Font Sayeras

School of Computing: Dissertations, Theses, and Student Research

The study of social networks is central to advancing our understanding of a wide range of phenomena in human societies. Social networks co-evolve concurrently alongside the individuals within them. Selection processes cause network structure to change in response to emerging similarities/differences between individuals. At the same time, diffusion processes occur as individuals influence one another when they interact across network links. Indeed, each network link is a logical abstraction that aggregates many short-lived pairwise interactions of interest that are being studied. Traditionally, network co-evolution is studied by periodically taking static snapshots of social networks using surveys. Unfortunately, participation incentives …

Supervising Child Welfare Professionals Virtually During A Pandemic, Quality Improvement Center For Workforce Development

Other QIC-WD Products

We are in the midst of a pandemic and many child welfare professionals across the country are working from home. Not only are staff having to become accustomed to this new “normal,” but are having to do so while educating their own children, caring for elderly parents, and determining how to meet the needs of the families and children they serve. During the COVID 19 crisis, supervisors must consistently engage their employees, while assessing the needs of their employees and the needs of the families served by the child welfare system. The QIC-WD wants to bring the available evidence to …

Addressing The Need For An Alternative Education Collaborative In Nonmetropolitan School Districts, Trina Pettit

Department of Teaching, Learning, and Teacher Education: Theses and Other Student Research

Through both federal and state educational legislation, there have been efforts to increase the accountability of schools in meeting the educational needs of all students and increasing the nation's graduation rates. States and districts across the nation have responded differently to these laws. As one pattern, there has been a rise in alternative schools and programs developed to address the educational needs of students who have not been having success with the traditional school model. Even as alternative schooling becomes more common, there is limited guidance in establishing these programs and limited professional development designed specifically for those teaching or …

[Nebraska] Innovation Studio Coordinating Army Of Makers For Ppe [Personal Protective Equipment] Projects, Deann Gayman

Nebraska Innovation Studio

Nebraska Innovation Studio coordinating army of makers for personal protective equipment (PPE) projects.

While assembling up to 1,800 face shields (https://news.unl.edu/newsrooms/today/article/nebraska-umakers- step-up-to-equip-healers/) a day, staff at Nebraska Innovation Studio (https://innovationstudio.unl.edu/nebraska-innovation-studio) are also assisting coordination of an army of community workers and volunteers to make more personal protective equipment, namely gowns for first responders and fabric masks for essential workers.

After the success of the face shield project, Innovation Studio staff started fielding requests for new projects — chief among them: protective gowns for first responders.

“The Lincoln-Lancaster County Health Department heard about the (face shield) project …

The Role Of Conformational Dynamics In Isocyanide Hydratase Catalysis, Medhanjali Dasgupta

Department of Biochemistry: Dissertations, Theses, and Student Research

Post-translational modification of cysteine residues can regulate protein function and is essential for catalysis by cysteine-dependent enzymes. Covalent modifications neutralize charge on the reactive cysteine thiolate anion and thus alter the active site electrostatic environment. Although a vast number of enzymes rely on cysteine modification for function, precisely how altered structural and electrostatic states of cysteine affect protein dynamics, which in turn, affects catalysis, remains poorly understood.

Here we use X-ray crystallography, computer simulations, site directed mutagenesis and enzyme kinetics to characterize how covalent modification of the active site cysteine residue in the enzyme, isocyanide hydratase (ICH), affects the protein …

How Moral Foundations And Traditional Sex Ideologies Influence Attitudes On Bystander Intervention Among College Students, Bailey Lytle, Kyle Bizal, Haley Hansmeier, Taylor Brumbaugh, Joshua Magee, Julia Sullivan, Shaina Kumar, Sarah Gervais, David Dilillo

UCARE: Research Products

Many researchers highlight the need for bystander prevention programs on college campuses to mitigate the risk of sexual assault among college students (Caver, 2013).

However, Hoxmeier, O’Connor, and McMahon (2020) found that college students often hold different attitudes towards bystander intervention based on adherence to traditional gender roles.

Other researchers have found that those who do intervene tend to be higher in moral values such as altruism and social responsibility (Moisuc, Brauer, Fonseca, Chaurand, & Greitemeyer, 2018).

To date, there is little known about the specific link between traditional sex roles and moral values as they relate to bystander attitudes, …

Management Effects On Soil Quality Of The Geary Soil Series In Thayer County, Nebraska, Aime Nishimwe

UCARE: Research Products

The CGIAR reports that around 40% of global crop yield variability is explained by climate. While global food consumption is expected to soar in 2050, the impact of climate change accounts for approximately 5% decrease in crop productivity. FAO estimates a 60% increase in global food demand by 2050, with global population reaching 9.8 billions. Sustainable soil management was also noted to boost agricultural food production by 58%. The evaluation of the impact of different management practices on dynamic soil properties was conducted on Geary silty clay loam, 3 to 7 %, eroded soils, which are mainly used for crop …

Guidelines For Sustainable Practices In The Rural Built Environment, Nash Kelly, Ethan Weiche

UCARE: Research Products

This poster provides information about sustainable changes people can make to better improve their health, community and built environment. From what is shown, this can be done through community gardens, pedestrian access and building certifications.

According to the World Health Organization (WHO), climate change will have direct and significant health impacts (1), which the Lancet Countdown identifies as disproportionately affecting at-risk populations.(2) The challenges of geographic isolation and lack of population density in rural and remote areas limits adequate access to basic healthcare services, such as primary care, emergency care, and mental health services. Additionally, the health deficit experienced by …

Effect Of Calcium Supplement On Eyesight Of Western Tiger Salamanders, Abigail Horner, Dennis Ferraro

UCARE: Research Products

There has been some discussion in herpetoculture about adding calcium supplements to the diets of salamanders. Adding calcium supplements to a salamander’s diet has been indicated to contribute to blindness. Calcium supplements are usually given to reptiles and amphibians to prevent dietary deficiencies, particularly metabolic bone disease. The link between lack of calcium and metabolic bone disease is well established in reptiles, but is lacking significant research with regards to amphibians. Within the eye of a salamander, there are calcium channels that mediate photosynthetic rods in the absence of light. With a calcium rich diet, it is believed that these …

Individual Attitudes And Perceived Efficacy Toward Bystander Intervention Among Childhood Trauma Survivors, Haley Hansmeier, Taylor Brumbaugh, Bailey Lytle, Kyle Bizal, Adisson Ams, Daniel Stephens, Shaina Kumar, Sarah Gervais, David Dilillo

UCARE: Research Products

◉ Childhood abuse and neglect are related to a number of negative outcomes in adulthood, including increased risk for mental health disorders and additional traumatic experiences, poor self-efficacy, and difficulties with interpersonal relationships (Brietzke et al., 2012; Dube et al., 2003; Sachs-Ericsson, Medley, Kendall-Tackett, & Taylor, 2011).

◉ Women who have experienced childhood sexual abuse in particular are at greater risk for lower levels of self-efficacy in adulthood (Diehl & Prout, 2002).

◉ Because sexual abuse survivors experience low self-efficacy, they might feel less confident with regard to engaging in bystander intervention, even though they want to prevent another victim …

Examining The Influence Of Childhood Trauma On College Alcohol Use And Mental Health: A Comparison Between United States And Philippines, Irenea Soetjoadi, Jessie Tibbs, Antover Tuliao, Dennis Mcchargue

UCARE: Research Products

College students who have experienced trauma might use alcohol as a way to escape from their problems as drinking is a common way to forget the problems and create feelings of relaxation. Though the existing research has found that childhood trauma negatively impacts future alcohol use in many individuals, the specific patterns of these relationships across different cultures are not well understood. In this study, we investigate how these relationships vary across United States and Philippines. We hypothesized that college students who experience childhood trauma will report more mental health symptoms and greater alcohol consumption. Furthermore, we tested the ability …

Extreme Fire As A Management Tool To Combat Regime Shifts In The Range Of The Endangered American Burying Beetle, Alison K. Ludwig, Daniel R. Uden, Dirac Twidwell

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

This study is focused on the population of federally-endangered American burying beetles in south-central Nebraska. It is focused on changes in land cover over time and at several levels of spatial scale, and how management efforts are impacting both the beetle and a changing landscape. Our findings are applicable to a large portion of the Great Plains, which is undergoing the same shift from grassland to woodland, and to areas where the beetle is still found.

Microbiota Accessible Carbohydrates And Susceptibility To Clostridioides Difficile Infection, Keegan Schuchart, Jennifer Auchtung, Thomas Auchtung

UCARE: Research Products

This experiment looked into the effects of dietary microbiota accessible carbohydrates (MACs)on the composition of human GI microbe colonies and their susceptibility to pathogen infection. Three different concentrations of MAC ingrained media were tested in mini bioreactor arrays, treated with antibiotics, infected with Clostridioides difficile, then allowed to recover. Microbe community was examined for strain composition and diversity before and after the antibiotic treatment and Clostridioides difficile infection. After the initial mini bioreactor run, individual isolates were investigated in their ability to respond to specific MACs Arabinoglactina, Inulin, and Soluble starch at experimental concentrations.