Digital Commons Network^™

Optimize The Niu Split Hopkinson Pressure Bar Apparatus For Conducting High Strain Rate Tensile Test On S304 Foils, Jiale Ji

Graduate Research Theses & Dissertations

Split Hopkinson Bar (SHB) methods are widely used to experimentally characterize the mechanical properties of materials such as metals, concrete, and ceramics undergoing rapid deformation. NIU had a split-Hopkinson tensile apparatus that can conduct coarse tensile test, but it can’t output the useful signal. The aim of this thesis is to optimize the existing apparatus, so the high strain rate tensile tests for the stainless steel 304 can be conducted and useful signal can be got. The alignment of the bars is critical for a good signal that has less noise. To eliminate the noise signal, some accurate fixture is …

Investigating Boredom Within The Context Of Sixth-Grade Mathematics Classes, Tammy S. Judkins

Graduate Research Theses & Dissertations

This dissertation examined how the perception of the achievement-emotion of boredom impacted the academic agency of sixth-grade mathematics students. The study for this dissertation was completed during the Covid 19 pandemic. Through an explanatory sequential mixed methods study, sixth-grade mathematics student volunteers from a Midwest middle school responded to survey items on achievement-emotions as well as shared their perspectives about their perception of boredom in three mathematics settings: classroom, studying and/or independent learning, and testing. Eleven of the 69 sixth-grade mathematic students participated in three rounds of data collection: the AEQ-M Survey, homogenous focus group discussions, and individual interviews. A …

A New Boundary Interlock Geometry Design Method For Fdm Multi-Material Part Strengthening, Shivaram Sree Venkata Shanmukha Kakaraparthi

Graduate Research Theses & Dissertations

Multi-material Fused Deposition Modelling (FDM) enables the cost-effective realization of designs in complex geometries built with multiple materials. However, achieving an adequate level of bonding strength between different materials remains a significant challenge. Besides the traditional way of addressing this challenge by strengthening material bonding at the molecular scale by optimizing the printing parameters, introducing a new design methodology that creates stronger multi-material interface geometry could also offer effective solutions. This work studied the mechanical properties of multi-material printed objects, with a particular focus on the interface zone formed between different materials at their geometrical boundaries. A new mathematical simulation …

Preservice Teacher Socialization For Social Justice: Exploring Stances And Enactments Of Social Justice Pedagogies, Eric R. Junco

Graduate Research Theses & Dissertations

This multicase study examined the socialization experiences of four preservice high school English teachers from four different Midwestern teacher education programs to understand how their acculturative and professional socialization experiences influenced their social justice beliefs. This study also examined how participants’ most salient social justice beliefs took shape within their social justice stances, mission-oriented approaches to enact social justice pedagogies like culturally responsive teaching, antiracist pedagogy, and culturally sustaining pedagogy within their classrooms. This study was framed by occupational socialization theory and critical race theory. Data were collected from the Learning to Teach for Social Justice Belief Scale, interviews, and …

'Black Knight' Effect: The Role Of Russia In Countering Democratization In Montenegro And Serbia, Danilo Kalezic

Graduate Research Theses & Dissertations

Russia’s growing presence in the Balkans represents a rising concern for the region’s democratic performance. Recent years witnessed series of events impeded by Kremlin to influence the political dynamics and internal affairs of Montenegro and Serbia. Thus, Russia exhibits all the features of ‘black knight’ for democracy in the region. The thesis looks at the impact on democracy performance of the Kremlin involvement within the two countries. It presents an analysis of the activities and strategies that are utilized to undermine democratization of the countries and how they relate to each other. Furthermore, the thesis argues that Kremlin influence in …

Microbial Community And Soil Responses To Land Management Practices In Remnant And Restored Tallgrass Prairies, Desirae Marie Klimek

Graduate Research Theses & Dissertations

Critical ecosystem functions, such as decomposition and nutrient cycling, are driven by microbial communities within soil. As such, it is important to examine the effect of restoration practices, such as the presence of native grazers and prescribed burning, on these microbes and the soil they inhabit. The Nachusa Grasslands provides a chronosequence of restored tallgrass prairies ranging in restoration age from 5 to 33 years, as well as remnant prairies, and agricultural fields. These sites were sampled seasonally from 2013-2020 and microbial ribosomal RNA genes were surveyed to characterize soil microbial communities and assess how common restoration practices affect these …

Longitudinal Associations Between Parenting Stress, Adolescent Temperament, And Externalizing Behaviors, Kristina Kochanova

Graduate Research Theses & Dissertations

Although there is growing evidence that parenting stress and adolescent externalizing problems are linked cross-sectionally similarly to families of younger children, longitudinal research examining the direction of these associations among families of adolescents is limited. This study examined the direction of the link between parenting stress and adolescent externalizing problems over time and whether the associations differed due to adolescent temperament. Participants were 333 biological mothers (Mage = 40.15, SDage = 6.86; 75.7% White) with a 12- to 17-year-old adolescent. They were recruited through Amazon’s Mechanical Turk and completed psychometrically valid measures through Qualtrics at two time points, six months …

Impact Of Prairie Restoration On Geochemistry And Microbial Communities In Groundwater, Kayla Koenig

Graduate Research Theses & Dissertations

Prairie restoration is important for reversing the loss of biodiversity and repairing ecosystem functions humanity is dependent on diverse ecosystems. This study looks at the impact of the beginning phases of prairie restoration on groundwater geochemistry and microbial communities the relationship between them. This research project studied the geochemistry and microbial communities in five wells before, during, and after the beginning phases of the first year of a prairie restoration on the Northern Illinois University campus. Water samples were collected bimonthly for a year and analyzed on an Ion Chromatograph. Microbial samples were collected monthly and underwent DNA extraction, amplification, …

Aspergillus Nidulans Septa Are Indispensable For Surviving Cell Wall Stress, Ryland N. Spence, Walker Huso, Harley Edwards, Alexander Doan, Samantha Reese, Steven D. Harris, Ranjan Srivastava, Mark R. Marten

School of Biological Sciences: Faculty Publications

Septation in filamentous fungi is a normal part of development, which involves the formation of cross-hyphal bulkheads, typically containing pores, allowing cytoplasmic streaming between compartments. Based on previous findings regarding septa and cell wall stress, we hypothesized that septa are critical for survival during cell wall stress. To test this hypothesis, we used known Aspergillus nidulans septation-deficient mutants (ΔsepH, Δbud3, Δbud4, and Δrho4) and six antifungal compounds. Three of these compounds (micafungin, Congo red, and calcofluor white) are known cell wall stressors which activate the cell wall integrity signaling pathway (CWIS), while the three others (cycloheximide, miconazole, and 2,3-butanedione monoxime) …

Palliative Care For The Pandemic ; Zoom New World-Skills I Learned During The Pandemic, Krysten Vance

The Art of Medicine

No abstract provided.

Isolation, Chloe Olson, Teresa Eberhart

The Art of Medicine

No abstract provided.

Untitled, Nate Singh

The Art of Medicine

No abstract provided.

Numb, Anonymous -

The Art of Medicine

No abstract provided.

We Made It. Now What? A Qualitative Case Study Exploring How The Transition Of Black Men To A Historically Black Community College Is Influenced By Orientation 101, Eric R. Agee Jr.

Graduate Research Theses & Dissertations

A gap in achievement among Black men who pursue post-secondary education remains. Many Black men start their college education at community colleges, but little is known about their experiences at Historically Black Community Colleges (HBCCs). The purpose of this dissertation of practice was to gain insights into the influence of College 101, also labeled Orientation to College 101 (ORI 101), on the transition of Black men to an HBCC. I utilized a qualitative case study design. The main data source were 15 semi-structured interviews, which were supplemented with closed-ended student survey responses on the ORI 101 course evaluation and the …

Effect Of Cash Transfer On Household Fertility Choice And Children's Human Capital Accumulation In Uganda, Shaila Ahmed

Graduate Research Theses & Dissertations

This analysis examines the effects of conditional and unconditional cash transfer on household fertility decisions and other indicators of human capital accumulation. To test my hypotheses, I rely on the UCT and CCT sub-arms of the Cash-Plus Program recently implemented in Uganda. The design of the Cash-Plus Program follows randomized control trials for intervention. My empirical findings show that the Cash-Plus Program have no discernible impact on beneficiary households' pregnancy incidence. The only effect on the primary outcomes of interest is a marginally significant effect for household heads aged 25 to 49, who received unconditional treatments. The results also show …

Secondary School Gifted Students’ Attitude Toward The Classera Learning Management System In Saudi Arabia, Mansour Alamri

Graduate Research Theses & Dissertations

The present study examined secondary students’ attitude toward the Classera learning management system (LMS) within the context of gifted education in Saudi Arabia. The theoretical framework that guided this study was the technology acceptance model (TAM). Data were collected using the TAM survey, which consisted three subscales: perceived usefulness, perceived ease of use, and attitude. The data were collected from 306 gifted students in a secondary school in Saudi Arabia.Results indicated that gifted students’ attitude toward the Classera LMS is positive and showed that perceived usefulness and perceived ease of use were statistically significant predictors of gifted students’ attitude toward …

Impact Of Public And Private Investments On Economic Growth Of Developing Countries, Faruque Ahamed

Graduate Research Theses & Dissertations

This paper aims to study the impact of public and private investments on the economic growth of developing countries. The study uses panel data from 39 developing countries covering the periods 1990-2019. The study is based on the neoclassical growth models or exogenous growth models in which land, labor, capital accumulation, etc., and technology proved substantial for economic growth. The paper uses the impact on overall GDP growth and GDP per capita growth. The study used a mixed-effect regression model and a Bayesian logistic regression model to derive the findings. For private investments, domestic credit has a positive association, but …

Understanding The Impact Of Collective Efficacy And Race/Ethnicity On Child Internalizing And Externalizing Symptomatology, Demy Alfonso

Graduate Research Theses & Dissertations

Neighborhood collective efficacy has emerged as an important predictor of mental health problems, specifically internalizing and externalizing behaviors, among adolescents. Existing research has shown that the association between collective efficacy and mental health problems may differ according to the child’s racial or ethnic background. The present study used structural equation modeling (SEM) to examine the direct associations between collective efficacy at age 9 and internalizing and externalizing symptoms at age 15, while controlling for several demographic variables. Subsequently, a multigroup SEM approach was utilized to explore whether associations between neighborhood collective efficacy at age 9 and externalizing and internalizing symptoms …

Analyzing Multistationarity In A Model Of A Dual Phosphorylation Network, Killian Kearney Anderson

Graduate Research Theses & Dissertations

Otero-Muras, Banga, and Alonso in [18] state biological reaction systems exhibit multistationarity, a system with at least two positive steady states. According to Otero-Muras,Banga, and Alonso in [18], initial conditions within the system, however, dictate the number of stable states in that system. Furthermore, multistationarity is an important componenet present in biological reaction systems that manage cellular responses [18]. Signal pathways regulating cell maturation, cell replication, and cell death rely on such systems [18]. Given the importance of multistationarity in biological reaction systems, it is necessary to construct a mathematical model, one in which multistationarity will be configured. More importantly, …

Representations And Perceptions Of Sexual Pleasure In Undergraduate Anatomy And Physiology (A&P) Courses, Brenda Kucha Anak Ganeng

Graduate Research Theses & Dissertations

The World Health Organization defines sexual pleasure as an important part of positive sexual experiences and sexual health. Despite its importance, sexual pleasure is often omitted from sexual health programming and curricula. Undergraduate human anatomy and physiology (A&P) courses serve as avenues where students who intend to go into health care learn foundational knowledge about human body systems and health; however, to our knowledge, there has been no documentation of if and how A&P students learn about sexual pleasure. A&P textbooks serve as an important resource for curriculum design and learning. I sought to answer the following research question: How …

Transgenerational Effects Of Chronic Preconception Stress On Developmental And Health Outcomes In Prairie Vole Offspring: Potential Mediation By Parental Emotionality, Mother-Father Bond, Or Parental Care Quality, W. Tang Watanasriyakul

Graduate Research Theses & Dissertations

Background: A positive rearing environment is important for the health and well-being of growing offspring. Chronic parental stress can create a toxic rearing environment, which may impair developmental and sociobehavioral outcomes of the offspring. Specifically, parental stress is linked to unstable parental emotionality, tension between mother and father, and poor parenting quality, although the inter-relatedness of these factors and the mechanisms through which they contribute to the outcomes of the offspring need further investigation. The current study investigated developmental and sociobehavioral outcomes in prairie vole offspring exposed to chronic preconception stress, with parental emotionality, strength of mother-father bond, and parental …

What Mother Meant: Maternal Competence, Medical Authority, And Memory In The Case Of Mary Bickerdyke (1820-1910), Megan Marie Vangorder

Graduate Research Theses & Dissertations

Mary Ann Bickerdyke, a poor widowed mother from Galesburg, Illinois, cared for sick and wounded soldiers across the Western theater throughout the course of the American Civil War. As a result of her efforts, authors and historians lauded her accomplishments. Her success as a Civil War nurse and Sanitary Commission agent has been the subject of several biographies and young adult books that idealize the role of women during the war. These portrayals suggest that Mary Bickerdyke provided an example of determined professionalism during the war years.

Those histories, however, do not tell the whole story. Mary Bickerdyke’s professional journey …

“Not A Typical Adjunct”: Qualitative Case Studies Of Adjuncts Serving A Teacher Preparation Program, Rachel Lee Warren

Graduate Research Theses & Dissertations

The teacher shortage in Illinois drives a need for robust teacher education programs. Simultaneously, changes in higher education have forced a dependence on adjunct instructors. While this provides an opportunity to have teacher candidates instructed by talented, accomplished current practitioners, adjuncting is a low-paid, exhausting job with little security. As adjuncts are predominantly women, this suggests the issue is gendered. In a descriptive case study of five adjuncts serving a teacher preparation program, findings show that adjuncts experiences gendered organizational practices through invisible and emotional labor as well as through interaction with the ideal worker norm.

The Impact Of Community Violence Exposure On The Health Behaviors And Health Service Utilization Among High-Risk Black Men, Paris Willis

Graduate Research Theses & Dissertations

This qualitative study explored the lived experience of high-risk Black men exposed to community violence in hopes of understanding their health challenges and behaviors in highly violent communities. Eleven Black men considered high-risk participated in the study through individual semi-structured interviews addressing the research questions below:1. How do high-risk Black men perceive community violence? 2. How do high-risk Black men maintain their health residing in high violent communities? 3. How do high-risk Black men in high violent communities utilize healthcare? 4. Do high-risk Black men exposed to community violence trust healthcare providers? Community violence exposure is a complex multilayered topic …

Administrator Knowledge Of The First Amendment Rights In A School And How To Improve Legal Literacy Through Self-Efficacy, Stuart E. Wrzesinski

Graduate Research Theses & Dissertations

This dissertation examines the legal literacy of school administrators and the lack of mandated training regarding school law, specific to the First Amendment. With continual changes in education school administrators can function as the change agent for schools through the lens of self-efficacy. This dissertation is organized into three bodies of work. Paper 1 is a review of literature specific to legal literacy and First Amendment rights in schools. Additional research on self-efficacy theory is presented as a potential catalyst for increasing legal literacy in schools. Paper 2 documents data based on survey questions specific to legal literacy within the …

Precise Phase Space Control For Future Linear Colliders, Tianzhe Xu

Graduate Research Theses & Dissertations

The design of future linear colliders is highly constrained by their cost and footprint. Phase space partitioning offers an attractive path towards cost and complexity reduction through precise tailoring of particle beam distributions. In this dissertation, we discuss a phase space manipulation technique for generating flat electron beams---a type of beam distribution of particular interest to linear colliders. We report the experimental generation of flat beams with transverse-emittance ratio up to 200 at Argonne Wakefield Accelerator facility. We further expand the technique by combining it with transverse-to-longitudinal emittance exchange. We present the conceptual design of an electron injector capable of …

When Sanctions Can Benefit The Target: State Strategic Adjustment To Multilateral Sanctions In Russia And Beyond, Anna Marie Zapolska

Graduate Research Theses & Dissertations

The study analyzes how external threats in the face of multilateral sanctions can contribute to the sanctioned (target) state’s strategic adjustment in Russia and beyond. In 2014, the United States and the European Union, along with other Western allies, imposed severe economic sanctions in response to Russia’s military intrusion into Ukraine. In the Russian case, the sanctions failed to achieve their objectives and change the target state’s behavior. As a result, the country could strategically adjust its domestic and foreign policies to mitigate the damage. The key mechanisms that help explain Russia’s strategic adjustment to sanctions are an elite coalition, …

The Suburbanization Of The Assyrian Refugees And Migrant Families And Its Implications On The Assyrian Ethnic Identity, Saidouri Zomaya

Graduate Research Theses & Dissertations

This thesis argues that living in Albany Park, Chicago, is a personal and unique experience for Assyrian refugees and migrant families despite mutual feelings of belonging that residents may experience while living in the neighborhood. Along with the social and political factors that impact one’s experience of mobility and integration, “agency” plays an instrumental role in deciding whether to remain connected to one's community, potentially impacting one’s Assyrian identity and future generations. I utilize a qualitative research approach by interviewing Assyrian refugees and migrant families to shed light on the stories of the Assyrian community in Chicago. This research demonstrates …

Changing The Narrative Of Disengagement: Exploring Academic Identity Formation For Non-Ethno-European Students, Luis E. Lopez

Graduate Research Theses & Dissertations

The COVID-19 pandemic and the changing demographics of the American identity have drawn attention to the necessity of reforming the Ethno-European education system to meet the needs of a diverse student population. If the educational landscape is to be transformed to meet the needs of a growing non-Ethno-European student population, more research is needed to explore factors that increase non-Ethno-European students’ academic engagement. This research attempted to identify individual and systemic factors contributing to non-Ethno-European students’ academic engagement during secondary education. This exploration began by outlining the role a cohesive identity continuum has on education engagement for non-Ethno-European students. Antecedent …

Active To Reserves, Patrick Potter

Mighty Pen Project Anthology & Archive

An army veteran decides to return to the military via the reserves. He finds that things are quite different than he expected.

Articles, stories, and other compositions in this archive were written by participants in the Mighty Pen Project. The program, developed by author David L. Robbins, and in partnership with Virginia Commonwealth University and the Virginia War Memorial in Richmond, Virginia, offers veterans and their family members a customized twelve-week writing class, free of charge. The program encourages, supports, and assists participants in sharing their stories and experiences of military experience so both writer and audience may benefit.