Digital Commons Network^™

Enhancing Student Learning Of The Physics Of The Human Eye In The Context Of Computer Vision Syndrome During Covid-19, Liang Zeng, Guang Zeng

Physics & Astronomy Faculty Publications

No abstract provided.

Impact Of Delphi-Developed Rubrics On Rater Consistency In 14 Cfr 141 Flight Training Assessment Environments, Lewis Robert James Archer

Theses and Dissertations

Pilot schools operating in accordance with 14 CFR 141 provide a substantial supply of pilots to the aviation industry. Recent high industry demand for pilots has created turnover among the flight instructor workforce, often considered an entry-level position used by aspiring aviators to build flight experience. This in turn means that check instructors, evaluators who are often selected from the more senior flight instructor population at a pilot school, are generally less experienced than in the past. Anecdotal evidence suggests that there is low consistency among these check instructors when conducting performance-based assessments. This study sought to determine the existing …

Division I Female Business Student-Athletes And Career Readiness During Their Academic Careers At A 4-Year Institution, Brianna Black

Theses and Dissertations

The purpose of this project is to explore female student-athletes within a business major and the transition from student-athlete into a professional career in a nonplaying sport capacity. This qualitative study examines eight female student-athletes who have selected a business major and their experiences with career readiness. Literature shows that student-athletes are behind in aspects of career readiness due to their focus on academic coursework and aspects of athletics with potential hopes of still becoming professional athletes. In addition, female student-athletes specifically business students are behind their counterparts due to the competitive nature of being a business student let alone …

The Catalytic Conversion Of Corn Stover Sugars Into Lactic Acid, Ahmed Essam

Theses and Dissertations

The rising global demand for addressing global warming necessitates the development of renewable-based alternatives to current fossil fuel-based chemicals and fuels. Lignocellulosic biomass is the most abundant energy source following fossil fuels. As a result, agricultural residues such as corn stover have attracted substantial interest for utilization as a potential feedstock for renewable chemicals.Previous research work at the University of North Dakota showed promising results in converting corn stover sugars into chemical building blocks. The most crucial of these chemicals is lactic acid, which can be used in multiple applications including food, pharmaceuticals, and biodegradable plastics. Traditionally, lactic acid is …

Fluorescence Imaging Systems To Detect Contamination On Surfaces Common In Food Processing And Medical Facilities, Benjamin Hu

Theses and Dissertations

Biofilm are aggregates of microbial cells encased under an extracellular polymeric substance (EPS) and resist sanitizers or antibiotics. Because of their persistence on various surfaces such as medical devices or industrial piping, biofilm formation is associated with approximately 65% of all microbial infections. Thus, their detection and deactivation are of great importance to public health. Many detection methods such as swabbing require sampling by rubbing , which can be inefficient and challenging. This study proposes the use of handheld multispectral fluorescence imaging systems to detect and deactivate biofilm in situ. We utilized the Contamination and Sanitization Inspection (CSI) and -Disinfection …

Numerical Simulation And Assessment Of Underground Blue Hydrogen Storage In Depleted Gas Reservoir, Abraham Kazala

Theses and Dissertations

Nowadays, the world needs more energy than ever before. This need emphasizes that the world also requires a sustainable system that can meet these growing demands while addressing the overall impact on the environment. For this reason, the international community, including all levels of environmental policymakers, have shown a great deal of concern about the tremendous negative effects of fossil fuels on the globe. The impact of carbon dioxide as a Greenhouse Gas (GHG) from burning fossil fuels on the ozone layer and what it entails in global warming and, therefore, climate change has motivated research on finding either alternatives …

Targeting World Language Learning In The Target Language: A Qualitative Inquiry Of The K–12 Foreign Language Teacher Experience, Igor Ljevaja

Theses and Dissertations

This qualitative study explores the current practices of K–12 foreign language teachers (FLTs) in using the target language (TL) within an urban school district in the Midwest United States. Focusing on how FLTs engage in professional development (PD) to optimize their TL use in the classroom, the study investigates the strategies and knowledge FLTs employ to foster TL proficiency among students. Purposeful sampling was employed to recruit participants (n = 5) who represented full-time FLTs, taught between sixth and 12th grade, and had at least four years of teaching experience and valid state licenses. Semi-structured interviews with current FLTs provide …

Personality Across Realities: Correlations Between Personality Profiles And Preferences Within Roleplaying Games, Brittany Lee Mancha

Theses and Dissertations

Clinically maladaptive behaviors and personality types have been studied within gamers, both those who play video games and those who roleplay in tabletop games. However, the connection between personality types and the preferences of the players themselves in what and how they roleplay is just barely being studied. Personality traits, such as extraversion/introversion and motivation by pain or pleasure, may be both influencing the gameplay decisions and preferences of players, and vice versa. A total of 500 respondents completed the Millon Index of Personality Styles, Revised (MIPS-R), followed by a demographics survey and finally a survey assessing Dungeons and Dragons', …

Directivity Improvement Of A Broad-Beam Patch Antenna By Means Of A Flat Metamaterial Lens, Tyler Midas

Theses and Dissertations

This thesis demonstrates the development of a flat metamaterial lens intended to enhance antenna directivity in RF applications. Development and evaluation was performed with ANSYS HFSS, where a theoretical convex lens model was developed and used as a basis for unit cell refractive indices of the metamaterial lens. The unit cell demonstrated in this study leverages the properties of a nested split-ring resonator merged with a center column. Adjusting the rings allow for refractive index optimization and effective beam focusing. The work presented also provides a 2x2 antenna array with a feed network, which enables the future work of bench …

The Reservoir Geomechanics And Production Effects On Permafrost Stability During Polymer Eor, Shane S. Namie

Theses and Dissertations

The North Slope of Alaska (ANS) contains an estimated 40 billion barrels of heavy oil in relatively shallow formations (984 to 1,969 ft / 304 to 600 m) within the Prudhoe Bay Unit (PBU), Milne Point Unit (MPU) and Kuparuk River Unit (KRU). Extracting this resource presents unique challenges, especially when hydrocarbon-bearing zones are near the permafrost. Research on tertiary recovery processes in these shallow zones is limited, with prior studies indicating minor permafrost thawing and subsidence over 30 to 40 years but lacking a numerical simulation model supported by laboratory data.This study investigates the feasibility of an enhanced oil …

Using Problematic Sexual Behaviors And The Developmental Life Course Model To Predict Criminal Justice Involvement And Psychopathology By Early Adulthood, Amanda Schwartz

Theses and Dissertations

The developmental life course (DLC) model explains risk factors and developmental patterns among juveniles who have committed more than one sexual offense by considering the impact of major life events, experiences, and risk and protective factors throughout various developmental stages. Using an archival longitudinal dataset, the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN), this study applied the DLC model to explore the relationship between gender and onset and persistence of problematic sexual behaviors (PSBs) in childhood and adolescence with criminal justice involvement and psychopathology by early adulthood (N = 330, 46% male, M = 18.26 years) after controlling for …

Hydraulic Fracturing And Reservoir Simulation Modeling Of Enhanced Geothermal System Optimization For Economical Energy Production, Jerjes W Porlles Hurtado

Theses and Dissertations

Enhanced Geothermal Systems (EGS) have the potential for sustainable energy production but require large upfront expenditures and strategic development to be profitable. To reduce costs and increase energy output, this work integrates hydraulic fracturing (HF) modeling with reservoir simulation optimization to improve EGS design and operating efficiency. EGS uses hot, dry rock geothermal resources, mostly crystalline and sedimentary rocks with poor permeability. Shear stimulation is preferred over hydraulic fracturing in EGS reservoirs, but a comprehensive HF strategy is still lacking. This study fills this gap by evaluating hydraulic fracturing and proppant use for optimal EGS development. Hydraulic fracturing in EGS …

Elementary Teacher Instructional Self-Efficacy In Leader In Me Lighthouse Schools, Lara Storm

Theses and Dissertations

This study is a secondary data comparative analysis using the Leader in Me Measurable Results Assessment (MRA) to examine whether teachers at Leader in Me Lighthouse certified schools have a greater degree of instructional self-efficacy than teachers at non-Lighthouse certified Leader in Me schools. Literature shows that students in classes with teachers that have a higher degree of instructional self-efficacy experience higher student achievement and a more supportive classroom climate. In addition, those teachers with higher efficacy experience lower levels of stress and burnout and are more engaged in professional development. The guiding notion of this investigation is that implementing …

Evaluation Of Hydrogen Storage Potential In Depelted Hydrocarbon Formations: A Case Study Of The Middle Bakken Member In The Antelope Field, Williston Basin, North Dakota, Grace Oluwakemisola Taiwo

Theses and Dissertations

Hydrogen, as a low-emission fuel and energy carrier, plays a crucial role in stabilizing renewable energy variability amid global decarbonization efforts. Subsurface storage, uniquely secure against threats such as severe weather, military conflicts, fires, and acts of terrorism, is critical for large-scale hydrogen applications and addressing the intermittency of renewable resources. North Dakota, represents a classic example of a state where reliance on fossil fuels drives significant greenhouse gas emissions. The state also hosts the Bakken Formation, an important hydrocarbon formation where depleted or nearly depleted wells exacerbate environmental challenges through potential fugitive emissions. This study therefore investigates the feasibility …

Ex-Vivo Evaluation Of Clinically-Set Hydraulic Sealers Used With Di!Erent Canal Dryness Protocols And Obturation Techniques: A Randomized Clinical Trial, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Objectives This 2-part randomized parallel triple-blind clinical trial adopts a unique model assessing clinically-set hydraulic

calcium silicate-based sealers (HCSBS) after different root canal dryness protocols and obturation techniques.

Methods For the first phase of the study, 24 teeth scheduled for orthodontic extractions were allocated into four groups

according to the canal dryness protocol and the obturation technique. G1 (CLC-AHP): cold lateral compaction (CLC) with

AH Plus sealer, G2 (CLC-ES-SD): CLC with Endosequence (ES) after standard canal(s) dryness (SD); G3 (SC-ES-SD):

matching single-cone (SC) with ES after SD; G4 (SC-ES-PD): as G3 but after partial canal(s) dryness (PD). Teeth were

extracted …

Representación De La Mujer En El Videoclip Español Del Siglo Xxi: Casos De Ruptura Con Los Mandatos De Género., Julia Sainz Cortés

Capítulos de libros

El videoclip musical ha sido un exponente tradicional del sexismo en la cultura visual de las últimas décadas, en el que la representación femenina se ve marcada, en un porcentaje elevado, por la sexualización. A menudo esta representación promueve un ideal de belleza inalcanzable similar al que se vende en la publicidad y el cine de Hollywood. Asimismo, no puede subestimarse la influencia de la cultura mediática, que frecuentemente retrata y refuerza los estereotipos de género. Diversos estudios han demostrado que la representación de la violencia y la objetificación de las mujeres en los medios de comunicación y publicitarios impacta …

Normal Breast Tissues Harbour Rare Populations Of Aneuploid Epithelial Cells, Yiyun Lin, Junke Wang, Kaile Wang, Shanshan Bai, Aatish Thennavan, Runmin Wei, Yun Yan, Jianzhuo Li, Heba Elgamal, Emi Sei, Anna Casasent, Mitchell Rao, Chenling Tang, Asha S Multani, Jin Ma, Jessica Montalvan, Chandandeep Nagi, Sebastian Winocour, Bora Lim, Alastair Thompson, Nicholas Navin

Faculty, Staff and Student Publications

Aneuploid epithelial cells are common in breast cancer

Cxcr3-Cxcl11 Signaling Restricts Angiogenesis And Promotes Pericyte Recruitment, Jihui Lee, Megan E. Goeckel, Allison Levitas, Sarah Colijn, Jimann Shin, Anna Hindes, Geonyoung Mun, Zarek Burton, Bharadwaj Chintalapati, Ying Yin, Javier Abello, Lilianna Solnica-Krezel, Amber N. Stratman

2020-Current year OA Pubs

BACKGROUND: Endothelial cell (EC)-pericyte interactions are known to remodel in response to hemodynamic forces; yet there is a lack of mechanistic understanding of the signaling pathways that underlie these events. Here, we have identified a novel signaling network regulated by blood flow in ECs-the chemokine receptor CXCR3 (CXC motif chemokine receptor 3) and one of its ligands, CXCL11 (CXC motif chemokine ligand 11)-that delimits EC angiogenic potential and promotes pericyte recruitment to ECs during development.

METHODS: We investigated the role of CXCR3 on vascular development using both 2- and 3-dimensional in vitro assays, to study EC-pericyte interactions and EC behavioral …

Water, Rosario Sanchez, Gabriel E. Eckstein

Faculty Scholarship

As the new US administration begins its term in January 2025, its ability to address complex, interconnected challenges will shape the future of US-Mexico relations. From economic cooperation and migration to shared security concerns, the new president’s leadership will be pivotal in navigating these critical issues and strengthening bilateral ties between Mexico and the United States. Effective collaboration will be vital to building a more prosperous and stable North America.

To support this effort, the Wilson Center’s Mexico Institute has prepared a comprehensive booklet as a practical roadmap for the incoming administration. This publication offers actionable recommendations across six priority …

Evaluating Uas As A Tool For Improving Elk Population Counts In A Suburban Forested Area Of North Central Colorado, Michael Wussow

Theses and Dissertations

For decades, wildlife researchers have taken advantage of an aerial perspective for performing population counts because of challenges associated with ground observations. Due to advances in aviation technology and regulations, unoccupied aerial systems (UAS) have become increasingly available for wildlife population monitoring in addition to manned aircraft, with success largely dependent on the species, their habitat, and UAS utilized. This study compares a currently accepted method of counting North American elk (ground/spotting scope counts) to a novel method (UAS) to evaluate if a commercial-off-the-shelf quadcopter (COTS) UAS equipped with zoom-capable RGB cameras would be an acceptable tool for counting elk …

Investigation Of Gas Injection Eor In Conventional And Unconventional Reservoirs Based On Laboratory Experiments And Field Pilot Tests, Jin Zhao

Theses and Dissertations

Currently, fossil fuels (including oil, natural gas, and coal) are still the dominant energy sources in the United States. However, their extraction and utilization generate a significant volume of carbon dioxide (CO2) and associated gases, such as methane (CH4), ethane (C2H6), propane (C3H8), etc. Injecting these gases back into deep oil reservoirs offers a practical means to enhance oil recovery while reducing air pollution. The target formations are usually characterized by good porosity and permeability to ensure sufficient injectivity and storage capacity. However, recent unconventional reservoir development indicated that tight formations could also be potential targets for enhanced oil recovery …

Low Toxicity Of Dissolved Silver From Silver-Coated Titanium Dental Implants To Human Primary Osteoblast Cells, Ranj Nadhim Salaie, Alexandros Besinis, Christopher Tredwin, Richard D Handy

School of Engineering, Computing and Mathematics

The controlled release of silver as a biocide from Ag-coated medical implants is desirable. However, the biocompatibility of Ag leachates is poorly understood. This study investigated the toxicity of silver released from the silver plated titanium implants to human primary osteoblast cells; and the effect of cell culture medium on the silver speciation and bioavailability.

METHODS: Ti6Al4V discs were coated with Ag nanoparticles (NPs), silver plus hydroxyapatite (HA) nanoparticles (Ag+nHA), or Ag NPs plus microparticles (Ag+mHA). Primary human osteoblast cells were exposed to the leachates from the various discs for up to 7 days.

RESULTS: the total Ag concentrations released …

Preserving The Future Of Juries And Jury Trials, Paula Hannaford-Agor, Hope Forbush, Miriam Hamilton, Jawwaad Johnson, Morgan Moffett

Faculty Publications

To preserve the future of juries and jury trials, the National Center for State Courts (NCSC) convened a meeting of representatives from a broad array of justice system stakeholders as a project under the Justice for All Reauthorization Act (JFARA). To frame the stakeholder discussions, NCSC employed strategic foresight, a methodological approach designed to explore a range of possible futures of juries and jury trials within the American justice system as a vehicle for identifying critical vulnerabilities within the current jury system and proposing targeted strategies to preserve and strengthen jury trials. Critical vulnerabilities are those areas of weakness that …

From Race To Culture: Southeastern Mindanao Peoples And Their Crafts, 16th To 20th Centuries, Patricia Irene Dacudao

History Department Faculty Publications

No abstract provided.

Ta'tsir Al-Wasilah As-Sam'iyyah Al-Bashariyyah Fi Ta'allum Maharah Al-Istima' Li Al-Lughah Al-'Arabiyyah 'Ala Mukhtalif Al-Mustawayat., Ali Farhan, Asep Sopian

Al-Arabi: Journal of Teaching Arabic as a Foreign Language

This study aims to identify the general trends in the impact of audio-visual media. The research examines the effects of audio-visual media on listening skills and motivation in Arabic language learning, considering educational levels, research design,

Development Of Qr Code-Based Arabic Teaching Materials For Oral Skills: A Case Study On Hobby Topics For Grade 1 Madrasah Ibtidaiyah, Dina Mutiatunnisa, Zulfa Azalia Mujahidah, Imam Asrori

Al-Arabi: Journal of Teaching Arabic as a Foreign Language

The development of Science and Technology (IPTEK) demands learning activities that also involve technology. Especially now that the world of education has been filled by the Alpha generation who are very close to digital skills, so the teaching materials used must also support students to collaborate with technology. This study aims to develop teaching materials for Arabic oral proficiency grade 1 elementary school using QR Code and describe the characteristics of the product developed. This research uses a Research and Development (R&D) approach with Thiagarajan's 4D development model which has four stages, namely define, design, development, and disseminate. The results …

We Are All Cafeteria Originalists Now (And We Always Have Been), Jack M. Balkin

William & Mary Bill of Rights Journal

In Memory and Authority, I argue that Americans, both in politics and in constitutional culture, are "‘cafeteria originalists.’ They pick and choose when to follow the views of the founders, framers, or adopters (as they understand them) and often artfully recharacterize these principles to support contemporary political and legal arguments.” Like customers in a cafeteria who take the chocolate cake and leave the boiled kale, Americans pick the features of the framers they like to support their arguments, and leave other, less savory, features behind.

[...]

My central claim is that cafeteria originalism is not a pathology or a …

Tc-Ptp-Mediated Regulation Of P38 Mapk Pathway Promotes Uvb-Induced Apoptosis In Skin, Lindsey Susie Shim

Theses and Dissertations

T-cell protein tyrosine phosphatase (TC-PTP) is a non-receptor PTP that has been shown to have various roles in signaling pathways. Our previous studies have demonstrated that the TC-PTP deficiency in the epidermis can exacerbate hyperplastic response by inducing epidermal cell proliferation in response to tumor promoter TPA or UVB exposure. This implies that TC-PTP plays a tumor-suppressive role in the epidermis and provides protection against UVB radiation, which is well known to contribute to skin cancer development. The p38 mitogen-activated protein kinase (MAPK) is one of serine/threonine kinases that are activated through environmental stress including UVB. It has been demonstrated …

3d Bioprinted Coaxial Tubule Optimization For Human Aortic Endothelial Cell Growth, Ilse Gabriela Perez Garcia

Theses and Dissertations

This paper introduces a research study of printing parameter optimization of extruded, cell-laden, 3D bioprinted coaxial tubules, as well as cell interaction observations. Optimization of printing parameters seeks to reduce variability of the tubules’ inner and outer diameters. The tubules were manufactured from a 0.4% Collagen I - 1.6% NaC6H7O6 (Sodium Alginate) bioink, that reaches gelation through interaction with a 3.2% CaCl2 (Calcium Chloride) solution. The bioinks were extruded through a dual syringe pump mechanism connected to a coaxial nozzle, which is mounted on an adapted 3D FDM (Fused Deposition …

The Shift: Web 2.0 Tools And Learner Engagement From The Teacher Perspective, Deig Aaron Sandoval

Theses and Dissertations

The COVID-19 epidemic has altered the educational technology landscape and made Web 2.0 tools' potential for online instruction more apparent. This study uses the Decomposed Theory of Planned Behavior (DTPB) paradigm to examine teachers’ perceptions of Web 2.0 tools and online learning. The study aims to investigate and advance the expanding body of research on teachers' perceptions of Web 2.0 tools' potential to increase student participation in the classroom. The research questions examine how ready instructors are to utilize Web 2.0 tools, how they feel about using them, how perceived behavioral control variables affect their intents, and how subjective norms …