Digital Commons Network^™

Quantifying Deviation Of Elasticity In The Quasi-Elastic Domain Of Granular Soils, Wen Deng, Yufan Jin, Pingxin Xia, Qingqing Fu, Xiong Xia, Xiaoxia Guo

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The absence of purely elastic properties in granular soil is attributed to the reversible sliding that occurs between particles during the loading–unloading cycle, leading to the dissipation of energy through friction. Instead of the strictly elastic domain, we opt for a quasi-elastic domain to examine elastic behavior within the confines of elastic theory. Within this quasi-elastic realm, the response deviates to some extent from the idealized pure elastic behavior posited by the elastic theory. As a result, the elastic constitutive relations applied to granular materials are no longer strictly accurate and may exhibit deviations. With the aim of exploring the …

Identifying Early Warning Signs Of Construction Labor Shortages, Ahmed Shiha, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Construction labor shortages constrain project-level objectives and national development plans. The goal of this study is to utilize the lagged effects of macroeconomic conditions as early warning signs of construction labor shortages. To this end, the authors adopted a methodology, encompassing (1) retrieval of publicly available data and preprocessing of construction labor shortage as the target variable and macroeconomic measures as the explanatory variables, (2) identification of short-term associations between shortages and economic cycles using the Granger causality test, (3) examination of long-term relationships between labor shortages and economic conditions using the Johansen cointegration test, and (4) estimation of the …

Forecasting State-Level Construction Labor Earnings For Enhanced Project Cost Control: An Econometric And Deep-Learning Analysis Of The Leading Economic Indicators, Ahmed Shiha, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

As a major input to several work packages, the labor element constitutes a critical component for successful performance of construction projects. Localized labor shortages, fundamental changes in prevailing wage laws, and historical shifts in the unionization rates of construction workers impair the adequate estimation of construction labor costs in diverse labor market dynamics. Meanwhile, existing studies have utilized national-level indicators to study the trends of construction labor costs, but the relationship between the multifaceted local economic factors and state-level construction labor costs remains understudied. This paper fills such a knowledge gap. A three-stage methodology is adopted: (1) data collection of …

An In-Depth Review Of Euthanasia-Related Practices, Arguments For/Against Them, And Proposed Solutions For Their Most Glaring Legal/Ethical Problems, Macon Plecha

Williams Honors College, Honors Research Projects

This paper’s goal is to cover the topic of euthanasia-related practices at great length. Terminology, history, and current programs around the world are discussed first, with the last point covering a wide geographical range: Colombia, Japan, Israel, and Africa, to name a few outside of the Western world standard. Arguments for and against euthanasia-related practices are explored. Within these arguments, several pressing legal and ethical issues arise, and the most severe of these are expanded on through the offering of potential solutions: how to handle stand-alone psychiatric cases, how to improve advanced directives and poor reporting rates, and how to …

Comparison Of The Division And Fairness Of Household Labor Between The 1980s And Early 2000s, Madeline Rose Provins

Cal Poly Humboldt theses and projects

The purpose of this thesis is to examine change in the gendered division of household labor between the 1980s and early 2000s. The division of household labor has historically been inequitable reflecting parallel social hierarchies, power imbalances, and systemic inequalities outside the home.

I used a cohort sample of 1,157 respondents combined from the 1988 Wave 1 of the National Survey of Family and Households (NSFH) and the 2003 Wave 3 to test four hypotheses related to gender and household labor. I found that between 1988 and 2003, the gender gap closed in mean hours a week devoted to indoor …

Groundwater Pumping Impacts On Stream Depletion In Humboldt County, Ca: Integrating Analytical Models And Field Data, Andy Hans Heise

Cal Poly Humboldt theses and projects

This study addresses the significant concern of stream depletion from groundwater pumping in Humboldt County, CA. The objective of this study is to develop an analytical model for estimating stream depletion and integrating field data into model parameters.

The methodology involved conducting a field study near three operating wells by a stream, installing stream gages upstream and downstream of the wells, and recording pumping rates and schedules for two of the wells. The third well’s pumping data was synthetically generated, for privacy concerns of the well owner. The StreamDepletR package was used for estimating depletion rates in a stream in …

Patterns Of Tree Damage And Fuels Around Powerlines In Northern California, Zoe J. Ziegler

Cal Poly Humboldt theses and projects

Rural powerlines are critical for delivering electricity to communities far from urban areas but present a significant hazard when located in forested regions. During strong wind events, tree failure (i.e., broken branches, snapped stems, and windthrow) can bring combustible material in contact with high-voltage lines, causing electrical outages or setting fire to vegetation below the powerline. Additionally, elevated forest fuel loading can increase wildfire rate of spread and intensity, potentially increasing negative ecosystem impacts and decreasing containment capacity during powerline- ignited wildfires. The risks associated with rural electrical infrastructure, tree failure, and elevated fuel loading emphasize the need for improved …

Investigating The Role Of Motivation In Open-Label Placebo Responses, Joshua Worthington

Cal Poly Humboldt theses and projects

Placebo effects occur when an individual receives an inactive treatment that should be unable to provide therapeutic benefits but still demonstrates meaningful improvements in health. Open-label placebos extend this phenomenon by providing full disclosure to individuals that they are receiving a placebo, as opposed to traditional placebo treatments that utilize deception. The role of expectancy as a mechanism of change in placebo has received some mixed results in open-label placebo studies. To the author’s knowledge, motivation for change has not been examined in open-label placebo. The current study examined the role of motivation as a mechanism of placebo responses. To …

An Economic And Production Analysis Of Seaweed Farms In California And The Pacific Northwest, Brian Donovan

Cal Poly Humboldt theses and projects

Since the early 2010s, the seaweed aquaculture industry has steadily expanded in the United States, with states like Alaska, Maine, Hawaii, and Connecticut leading the way in the development of this emerging sector. However, information gaps remain concerning certain aspects of the domestic seaweed aquaculture industry. The purpose of this study was to examine the status of the seaweed aquaculture industry along the West Coast of the United States; specifically in the states of California, Oregon, and Washington. Seaweed farmers in these states were invited to voluntarily complete surveys asking important production, economic, and commercial questions regarding their operations. Data …

Can Dyslexia Diagnosis Induce A Stereotype Threat Effect? A Literature Review And Research Proposal, David H. Harris

Cal Poly Humboldt theses and projects

Dyslexia is a recognized psychiatric diagnosis in the DSM-5, categorized as a specific language disorder. Dyslexia is a hidden disability that affects how individuals process auditory and visual information. Many people have heard of dyslexia but it is largely misunderstood, even by educational professionals, and its general association with learning disability can be the basis for negative stereotyping and discrimination of people with dyslexia. The ‘Stereotype threat effect’ is a term from social psychology research referring to situations where one’s performance on a task is influenced by their identification with a social group that has a well-known stereotype about their …

“We Weren't Just Reading About Adventures; We Were Living Them”: Immersion, Transgressive Play, And Dungeons & Dragons, Nicolas Poulter

Cal Poly Humboldt theses and projects

Dungeons & Dragons is a game that has existed since 1974 with a singular focus: to tell epic stories with your friends. Currently on its 5th edition of the game, the ability to tell stories has been highlighted like never before. With an emphasis on storytelling and collaboration, there are bound to be moments that are difficult. These are called transgressive play experiences. This project will endeavor to explain how D&D, by design, is the perfect game to engage in transgressive play experiences. Because of this, I believe future projects studying benevolent transgressive play should consider D&D as the medium …

Examining The Gender Disparity In College Enrollment: Implications For Female Representation In Managerial Positions, Natalia Y. Felicelli

Williams Honors College, Honors Research Projects

The current gender disparity in college enrollment, with women constituting nearly 60% of enrollees and men approximately 40%, marks the highest recorded differential in educational participation. While society has made progress in challenging traditional gender roles, the glass ceiling may persist. This study explores the relationship between gender imbalance in college enrollment and prospects for increased female representation in managerial positions. By investigating this phenomenon, the study aims to identify factors contributing to women’s underrepresentation in leadership. Understanding this relationship could provide insights for policymakers, educators, and organizations. Increased female leadership presence may also inspire more women to pursue such …

The Impact The Supreme Court's Decision Has On Public Opinion, Mckenzie Dunigan

Williams Honors College, Honors Research Projects

By creating a survey, the analyzation of Akron college students public opinion shifts in regard to the Supreme Court's decision in Dobbs v. Jackson Women's Health Organization occurred. The data gathered allowed for the support of different trends that were able to assist in providing information towards the research question.

Reproductive Rights: How Voting Behavior Illustrates Shifting Political Attitudes, Keavy Callwood

Williams Honors College, Honors Research Projects

This research project intends to explore a causal link between the Supreme Court decision in Dobbs v. Jackson Women's Health Organization (2022) and shifting political attitudes as modeled through voting behaviors. Research will be conducted by using data from government and reputable sources that are representative of the general public to show that political attitudes have shifted since the release of the Dobbs decision. Additionally, the question will be analyzed through discussing several political theories and applying them to the current issues being studied. This research could help show how the Supreme Court is an important actor in the political …

The Role Of Reason In Religion, Moses Morgan

Williams Honors College, Honors Research Projects

In this work, I will argue that there is a proper place for reason within religion. I am primarily arguing against the claim that religions are sets of beliefs without reason, citing various thinkers who have made this claim. I will explicate and critique various conceptions of religion pulled from Muslim philosophers al-Farabi and Averroes and Catholic philosopher and theologian St. Thomas Aquinas. I will then provide an alternative position, synthesizing elements of each view, stating that religion is the primary way everyone interacts with reality in each moment. After establishing this concept, I will then argue for the extent …

Large Language Models And Identity: A Reflexive Approach, Nicholas Austin Nielsen

Cal Poly Humboldt theses and projects

This project explicates theories of identity, technology, and capitalism and uses an auto ethnographic approach in order to apply that explication at a personal level. The project responds to AI rhetoric in business and pedagogy and the instability surrounding perspectives on job security, the role of technology in Higher Education, and existential representations of the human. By deconstructing identity, ideology, cultural contexts, and technologic rhetorics, the goal is to further the scholarship surrounding Large Language Model applications in pedagogy and offer a personal, therapeutic approach to feelings of economic and existential discontent and fear experienced by students and educators regarding …

Loss Of Lgl1 Increases Expression Of C-Jun And Dcx In The Svz And Rms Of The Mouse Brain, Madison Leigh Gutierrez

Cal Poly Humboldt theses and projects

Glioblastoma (GBM), the most aggressive and treatment-resistant subtype of glioma, accounts for the majority of brain tumor–related mortality. A defining feature of GBM is its ability to invade healthy brain tissue through extensive cell migration, which severely limits the effectiveness of surgical and pharmacological treatments. Increasing evidence suggests that GBM cells activate gene programs known to drive normal neural stem and progenitor cell (NSPC) migration; however, the precise molecular mechanisms shared between NSPCs and GBM cells remain poorly understood. Lethal (2) giant larvae 1 (Lgl1), a conserved cortical cytoskeletal protein, has emerged as a key regulator of polarity and migration. …

The Mediating Effect Of Injury On The Relationship Between Running Mileage And Depressive Symptoms In Division 2 Cross Country Athletes, Jaxon Leduc

Cal Poly Humboldt theses and projects

Training for a cross-country season requires athletes to accumulate a high volume of training miles at different intensities. Over a period of months and years, consistent high training volumes have been shown to contribute to overuse injuries in cross country athletes. Injuries have been shown to negatively impact athlete’s mental health; this is especially true in student athletes. The purpose of this research is to explore the mediating effect of injuries on the relationship between training volume and mental health in collegiate cross-country runners. Participants in this study were 40 members of NCAA Division 2 Cross Country teams with eligibility …

A Porpoise-Driven Approach: Using Agent-Based Models To Predict Population Consequences Of Offshore Wind Noises On Gulf Of Maine Harbor Porpoises, Ben Greenberg Pridonoff

Cal Poly Humboldt theses and projects

Marine mammals are increasingly exposed to anthropogenic noises, including from offshore wind activities, necessitating the development and refinement of tools to predict the effects of noise on their populations. Agent-based models (ABMs) are an effective tool that can simulate realistic movements and behaviors of animals to quantify population consequences of disturbance. In this study, I used the Europe-based ABM ‘DEPONS’ to (1) evaluate its effectiveness in a new environment, the Gulf of Maine, USA/Bay of Fundy, Canada, and (2) develop estimates of the population dynamics of local harbor porpoises (Phocoena phocoena) interacting with expected noises from proposed floating …

Kelp Guardians Can Save The World: A Food Sovereignty Lab Report Of The Ghvtlh-K’Vsh Shu'-Srnelh-'I~ (Kelp Guardians) California Sea Grant, Delaney A. Schroeder-Echavarria

Cal Poly Humboldt theses and projects

As partners of the Ghvtlh-k’vsh Shu'-srnelh-'i~ (Kelp Guardians) California Sea Grant project, the Rou Dalagurr Food Sovereignty Lab and Traditional Ecological Knowledges Institute has actively engaged with local educators, Tribal organizations, and Tribal Nations to create youth-centered curricula, researched through a community-based participatory research lens. This is demonstrated through an innovative approach to recruiting and retaining Indigenous youth and community interest in coastal and marine ecosystems and resources by connecting with Indigenous cultural practices, Indigenous sciences, and community-based programs to encourage future careers. The Kelp Guardians project is led by the Tolowa Dee-ni’ Nation (TDN or Nation) and includes various …

Structural Analysis Of Multi-Domain Dynamic Systems Modeled Via Bond Graphs, Arnold A. Fernandes, Jonathan W. Kimball

Electrical and Computer Engineering Faculty Research & Creative Works

Structural Observability (SO) and Structural Monitorability (SM) are structural properties utilized to determine the state and fault-free operation of components, respectively, in a bond graph (BG) model. BGs enable qualitative system analysis, evaluating whether existing sets of sensors and actuators ensure Structural Observability (SO) and Structural Controllability (SC) without knowledge of parametric values. Furthermore, the analysis determines whether there are sufficient sensors available to identify component faults accurately. This work provides a framework for automated sensor placement in a multi-domain physical system while analyzing the SO and SM properties. The MATLAB Structural Analysis Toolbox (MATSAT) conducts sensor placement in a …

Still Making It Up As He Goes: Revisiting The Hyper-Rhetorical Presidency In Trump’S Second Term, Richard Holtzman

Politics, Law, and Society Faculty Journal Articles

In Fast Capitalism’s 2020 issue, “This is Not Normal,” I explored Trump’s propensity for improvised rhetoric during his first term; that is, his reliance on “making it up as he goes” in his public statements, whether communicated verbally or through social media. The primary goal of my original essay was not simply to identify the president’s ad-hoc communication style—which is clear for all to see—but to argue that the president’s tendency toward improvisational speech matters because it represents more than just his approach to communication. This tendency toward improvisation also constitutes much of his approach to governing.

In “Making It …

An Extendable Soft-Switched Step-Up Interleaved Converter Integrated With Voltage Multiplier Cells, Amir Hasan Babanezhad, Koosha Choobdari Omran, Reza Beiranvand, Pourya Shamsi

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a multiphase high step-up interleaved converter is introduced, which ensures low-input current ripple, low-component currents, and voltage stresses. The proposed circuit guarantees ZVS operation for power switches and ZCS operation for power diodes, which significantly reduce converter switching losses and EMI emission and improve its efficiency. Therefore, its passive components volume can be reduced by using high switching frequencies. In addition, the interleaved technique reduces input current ripple and input filter volume and provides high-power density. High-voltage gain and low-voltage stresses on the components are also achieved due to the integration of the converter structure with the …

Social Work Professional Portfolio, Anthony Hoffer

Graduate Student Portfolios, Professional Papers, and Capstone Projects

No abstract provided.

Master Of Social Work Portfolio, Kinley Mae Pope

Graduate Student Portfolios, Professional Papers, and Capstone Projects

No abstract provided.

A Critical Juncture: The Convergence Of Natural Resource Management And Tribal Sovereignty, Anna Aleta Butterfield

Graduate Student Portfolios, Professional Papers, and Capstone Projects

This portfolio reflects the work I’ve done in my four years as a dual degree student, pursuing a Master of Science in Environmental Studies and a juris doctorate degree, and focuses on policies and laws surrounding natural resource management. It touches on how those policies relate to and expand or constrict the exercise of sovereignty by indigenous populations.

This piece first considers the effects of plastic on salmon populations and those indigenous groups that rely on salmon for subsistence and cultural purposes. The remaining three pieces focus on various aspects of the Confederated Salish and Kootenai Tribes - Montana Water …

Msw Portfolio, Amy Sanders

Graduate Student Portfolios, Professional Papers, and Capstone Projects

MSW Portfolio through the lens of "otherness".

Msw Portfolio, Marie Nelson

Graduate Student Portfolios, Professional Papers, and Capstone Projects

No abstract provided.

Understanding Students' Decision To Proceed With Hybrid Education: Examining The Post-Covid-19 Scenario, Heng Zhang

Master's Theses and Doctoral Dissertations

Hybrid education—integrating online and in-person instruction—has become a prominent educational model in the post-COVID-19 educational landscape. While prior research has examined the benefits and challenges of hybrid learning, as well as general acceptance patterns through frameworks such as the technology acceptance model and the theory of planned behavior, critical gaps remain in identifying the factors shaping students’ behavioral intentions toward this educational model. This study addresses these gaps by analyzing the interplay of external variables (such as prior hybrid learning experience, employment status, course type, commute time, and work-family balance) and socio-demographic attributes (such as age, gender, academic program and …

Exploring Emotional Awareness Through Interactive Design, Mona Gandomkar

Electronic Theses and Dissertations 2020 - Present

This research was inspired by my emotional journey after relocating to the United States. Navigating a new culture, language barriers, and unfamiliar routines brought a complex mix of emotions. These experiences led me to begin to better understand and manage my emotional responses. That process revealed the importance of emotional awareness and became the foundation for my exploration into how design can help individuals recognize and engage with their emotions more meaningfully.

Emotions are significant in human life, from social relationships to decision-making. However, many people fail to understand their emotions or how to control them. Individuals experience emotions differently, …