Digital Commons Network^™

Selecting Without Replacement From A Population Of Bands Of Serially Connected Objects, James E. Marengo, Dominick Banasik, Joseph Voelkel, David L. Farnsworth

Articles

The sampling procedure from a finite population of objects that are serially attached into bands is described and analyzed. One object is randomly selected and removed at a time, which results in that object’s band being broken into two bands or shortened by one object. The main result gives the probability of choosing an object that is part of a band of serially connected objects of any specified size at each stage of the selection process.

Automating Junk Science, Lisa Waters

UC Law Journal

In the late twentieth century, the boom of forensic disciplines in criminal prosecutions helped drive mass incarceration to an all-time high. Yet scientific and legal inquiry revealed a disturbing truth: Most forensic methods accepted in criminal courts are entirely lacking in empirical support or scientific foundation—in other words, “junk science.” Forensic proponents have recently turned to computer algorithms, costly equipment, and proprietary trade secrets litigation to defend dubious techniques, ushering in a second wave of forensic reliance. But automated technology has masked rather than cured the foundational infirmities in these forensic fields.

This Article examines the growing trend of automated …

Molecular Lung Imaging Following Exposure To Radiation Predicts Long-Term Survival In Rats, Anne V. Clough, Kathrina Mpala, Taheri Pardis, Laura Norwood Toro, Andreas M. Beyer, Tracy Gasperetti, Ming Zhao, Sarah Kerns, Heather A. Himburg, Said H. Audi

Mathematical and Statistical Science Faculty Research and Publications

Delayed effects of acute radiation exposure (DEARE), including radiation pneumonitis (lung-DEARE), develop weeks to months after radiation exposure. Pathway-targeted biomarkers that capture early oxidative stress and cell death could improve risk stratification and provide objective measures of mitigator efficacy. The objective was to test whether molecular lung imaging predicts long-term survival and mitigator response after irradiation. Rats received 13.5 Gy leg-out partial-body irradiation with a subset treated with the radiation-injury mitigator lisinopril. Rats underwent lung imaging at weeks 2 and 4 post-irradiation with ^99mTc-duramycin (cell death) and ^99mTc-HMPAO (oxidative stress). Plasma mitochondrial damage-associated molecular patterns (mtDAMPs) were also …

Acinetobacter Spp. With Lower Susceptibility To Quaternary Ammonium Compounds Enriched In Microbial Communities Of Frequently Used Sinks, M. C. Cruz, R. Ruhal, J. Lavin, S. Bridwell, N. Maghboli Balasjin, B. Raasch, R. Melton, Brooke K. Mayer, Christopher Marshall, Krassimira R. Hristova

Civil and Environmental Engineering Faculty Research and Publications

Sanitary environments that undergo frequent cleaning and disinfection may harbor microbial communities with potential health risks. While biofilms in healthcare settings are well studied, comparatively less is known about sink-drain microbiomes in public and educational buildings, where hundreds of people may interact with shared sink fixtures. This study characterized the spatial and temporal heterogeneity of sink-drain biofilm microbiomes in academic buildings. We sampled 16 sinks from two buildings (four floors each, with sinks closest and furthest to the bathroom entrance), which are cleaned daily with quaternary ammonium compound (QAC) disinfectants, during periods of low and high student traffic (during and …

Regulatory Cost Of Production In Napa County Vineyards, Lynn Hamilton, Michael Mccullough

Agribusiness

Regulatory costs are an increasing concern for California growers. Recent studies in Salinas Valley lettuce and San Joaquin Valley fruit, vegetable and row crops show that regulatory costs are growing at a much faster rate than costs of production. Napa County Farm Bureau contacted Cal Poly to conduct a case study of regulations accruing to Napa Valley vineyards. We interviewed one large (1000-acre) and one small (200-acre) vineyard in 2025 and documented the costs of complying with regulations in the following categories:

• Education and Training for Regulatory Compliance
• Air Quality
• Water Quality
• Surface and Groundwater Regulations …

Gulf Coast Faculty Council Minutes - March 19, 2026, Eric Saillant

Gulf Coast Faculty Council Minutes

No abstract provided.

Retained Placenta Removal Device (Womb-A), Savannah Fujimoto, Ciana Villar, Edward Barba

Biomedical Engineering

Womb-a aims to design a safe, minimally invasive, and effective product that solves the issue of removing retained placentas after childbirth reducing the risk of infection and uterine trauma. Womb-a brings a handheld motorized device that can be used at the bedside immediately after delivery of a baby. Retained placentas happen to approximately 1-3% of deliveries [1] which elevates the likelihood of postpartum infection and hemorrhaging. Current solutions include manual removal, windmill technique, and D&C which individually have severe issues such as elevating risk of infection, inconsistent removal of adhered placenta, and surgical complications. The Womb-a aims to mitigate these …

Reimagining The Laguna Lake Driving Range, Audrey Bonifacio, Jessica Rice

City and Regional Planning

The Laguna Lake Municipal Golf Course is located in San Luis Obispo, California, and is operated by the city. Recently, the community, city staff, and the City Council have begun a conversation regarding the use of the golf course. To explore the different uses, this senior project presents four alternative developments for a selected area of the golf course. These four uses include enhancing the existing driving range, a sports facility, a children’s center, and a senior living community. To assess these alternatives, the project explores current urban planning theories, development trends, and case studies for each use. Through this …

Unhsc Scm Performance Fact Sheets, Unh Stormwater Center

UNH Stormwater Center

No abstract provided.

Launch Skills: Virtual Career Camp Connects Rural Youth To Diverse Career Pathways, Caroline Homan, Meagan Hoffman

Journal of Youth Development

Rural youth often encounter persistent barriers in career and workforce readiness, including limited access to career exploration resources, mentorship, and post-secondary exposure, challenges that are compounded by geographic isolation and higher rates of rural poverty. To address these gaps, this manuscript describes the development and implementation of Launch Skills, a virtual career camp designed to broaden rural youths’ awareness of career pathways within food, agriculture, natural resources management, and human sciences (FANH). Grounded in Positive Youth Development principles, Launch Skills was collaboratively developed by North Dakota State University Extension and South Dakota State University Extension to provide flexible, accessible, and …

Towards Socially Legitimized Trust In Ai-Learning Systems, Sanket Patole, Rob E. Carpenter, Reed M. Milewicz, Rose M. Baker, John R. Turner

Human Resource Development Faculty Publications and Presentations

AI-enabled learning technologies are rapidly becoming institutional infrastructure. In this context, “trust” cannot be treated as a simple user attitude or a byproduct of technical performance. We argue that durable trust in AI-enabled learning systems is fundamentally a legitimacy outcome: stakeholders must judge AI-mediated practices as appropriate, credible, and defensible within the normative and governance structures of learning environments. Building on socio-technical systems scholarship and institutional legitimacy theory, we introduce Socially Legitimized Trust (SLT), a framework that helps us understand adoption stability and contestation through alignment among three foundations: technocratic validation (credible evidence of capability, limits, and reliability), social validation …

Scratch-Induced Damage Of Doped Dlc And Mos2 Coatings—Deep Symbolic Analysis, Ming Liu, Zhitong Xu, Noraphat Yuktanan, Tang Gu, Guangan Zhang, Jinyang Jiang, Fuqian Yang, Rui Liang

Chemical and Materials Engineering Faculty Publications

Understanding contact-induced damage is of paramount importance in the analysis of the lifespan and performance of surface coatings. In this work, we investigate the effects of dopants and interlayers on the structural durability of diamond-like carbon coatings (DLCs) and molybdenum disulfide (MoS₂) coatings on stainless steel via microscratch tests. The analysis of X-ray photoelectron spectroscopy (XPS) survey spectra and Raman spectra of the DLCs shows that the ratio of sp²/sp³ (i.e., the intensity ratio of sp² to sp³ obtained via XPS) is proportional to I_D/I_G, where I_D and …

A Phenomenological Study Of Teacher And Student Experience Within A Community Of Inquiry: Utilizing Wonder-Infused Pedagogy In An Elementary Outdoor Classroom, Andrew Gilbert, Steph N. Dean

Publications

This interpretive phenomenological study explores how wonder-infused pedagogy, enacted within an elementary outdoor classroom, supported the development of a community of inquiry. We position the community of inquiry as the overarching framework for cultivating social, cognitive, and teaching presence; wonder as the pedagogical driver; and outdoor learning as the authentic context for engaging in science practices. In response to schooling contexts that often privilege testing and individual achievement over collaborative inquiry, we examined an eight-week outdoor wonder project with third- through fifth-grade students. Data sources included group interviews, student journals, teacher reflections, and photographs. Students engaged in weekly wonder journaling …

A Data-Guided Analytical Framework For Assessing The Value Of Additional Variables In Heart Transplant Decision Making, Ali Dag, Hamidreza A. Dolatsara, Abdullah Asilkalkan, Joseph Ekong, Kamil Ciftci, Ugur Kucuk, Ozlem Cosgun

Department of Information Management and Business Analytics Faculty Scholarship and Creative Works

Heart transplantation is a life-saving procedure for patients with end-stage heart failure. The United Network for Organ Sharing (UNOS), which administers the US organ allocation system, substantially expanded the number of clinical and demographic variables collected in its database in 2004. This study examines whether these newly added variables improve the ability to predict survival outcomes for patients on the heart transplant waiting list. An information-gain-based feature selection approach, supported by an extensive review of prior studies, was combined with survival analysis and regularized regression to identify the most influential predictors. Using the selected variables, several classification models, including tree-augmented …

A Data-Guided Analytical Framework For Assessing The Value Of Additional Variables In Heart Transplant Decision Making, Ali Dag, Hamidreza Ahady Dolatsara, Abdullah Asilkalkan, Joseph Ekong, Kamil Ciftci, Ugur Kucuk, Ozlem Cosgun

School of Business

Heart transplantation is a life-saving procedure for patients with end-stage heart failure. The United Network for Organ Sharing (UNOS), which administers the US organ allocation system, substantially expanded the number of clinical and demographic variables collected in its database in 2004. This study examines whether these newly added variables improve the ability to predict survival outcomes for patients on the heart transplant waiting list. An information-gain-based feature selection approach, supported by an extensive review of prior studies, was combined with survival analysis and regularized regression to identify the most influential predictors. Using the selected variables, several classification models, including tree-augmented …

Cathy's Trike, Jameson Stengel, Victor Robles, Asher Becker

Mechanical Engineering

Cathy Hoenig needs a better way to safely steer her trike since she recently had her arm amputated at the elbow. Right now, the standard steering setup doesn’t work for her because it’s designed for someone with two arms. The main issue is that because she can't hold the steering bar with both hands, she loses control and stability while riding, which takes away from her freedom and independence. We’re looking to design some kind of support or adaptive steering system that’ll let her feel safe and confident on her trike again. Our goal is to create a solution that …

Bonderson Workbench, Han Xu, Aidan Robleto, Sean Murphy, Victor Duran

Mechanical Engineering

This project redesigns the existing creative workbenches in Cal Poly's Bonderson High Bay to improve mobility and functionality for students and staff in the Mechanical Engineering Department.

Fsae Bespoke Brake Calipers For Hub Motor Architecture, Connor William Vaughan, Liam Upton Walsh, Bradley Brian Kern

Mechanical Engineering

Brakes are the most critical safety system on any performance vehicle, and as Cal Poly Racing transitions their Formula SAE car from a single rear motor to a four-in-wheel motor setup with regenerative braking, the team identified an opportunity to develop a bespoke brake caliper tailored to their specific needs. This document outlines the research, design, manufacturing, and validation of custom front brake calipers designed to improve upon commercial motorcycle calipers in key areas such as serviceability, mounting rigidity, thermal behavior, mass, and hub motor integration. The resulting design is a two-piece, four-piston, radially-mounted aluminum caliper featuring titanium pistons, toolless …

Semi-Automated Oxide Etch System, Chloe Dodson, Andrew Korpela, Bobby Machado, Thomas Slayton

Mechanical Engineering

This document presents the scope of work for the senior design project titled Semi-Automated Oxide Etch System. This project arose from the need to improve the current method the microfabrication laboratory at Cal Poly uses to lower 100-mm diameter silicon wafers into a hydrofluoric acid solution to remove layers of oxidation. The goal of this project is to create a system where silicon wafers can be safely loaded into a holder and lowered at reliable time and depth increments into hydrofluoric acid. In this scope of work, we will present the relevant background research we have conducted, the specific objectives …

Bullying And Discrimination Experiences Of Bhutanese College Students: Prevalence, Impacts, And Responses, Kezang Sherab, John Howard

Journal of Global Education and Research

Prior studies as well as media reports have identified bullying and discrimination amongst Bhutanese school and college students as a cause of concern, especially so for a nation with Gross National Happiness as its goal. Bullying and discrimination are associated with negative outcomes and can impact overall well-being. This quantitative study examined bullying and discrimination amongst college students (n = 16) in Bhutan through a self-administered online survey to a representative sample of 2043 (male = 40.8%; female = 55.8%). There was a non-significant decline from the 2016 survey in the reported prevalence of being bullied (from 45.2% to …

Building Connections With Graduate Students Through Credit-Bearing Instruction, Michelle Desilets, Kimberly Pendell

Library Faculty and Staff Publications and Presentations

Graduate students often need support with research skills and other professional development that is under-recognized by their programs. Librarians play a key role in helping students fill in these gaps. This case study reviews student feedback on a librarian-developed and -delivered credit-bearing course. The course, Library Research and Scholarly Communication Fundamentals, is offered to graduate students across all disciplines. The curriculum is flexible and applicable to each student’s research, covering topics such as researching literature, citation and data management, and publishing in scholarly journals. The course has generated positive and constructive feedback from students, encompassing themes of self-efficacy, improved research …

Press Play! Integrating Gamified Tools Into Web- Based Formative Social Studies Assessments, Victoria L. Pierce

South Carolina Association for Middle Level Education Journal

In an increasingly technology-dependent world, middle school students are emergent experts in technology use although novices in content knowledge. Middle school social studies teachers have dual issues of relevance and rigor to balance in their instruction with students at this developmental level. To strengthen students’ historical reasoning skills, middle school social studies teachers can implement gamified learning in a variety of ways to make use of technology skills and interests of students while also meeting content standards. This research models integration of gamified assessment into a virtual learning environment featuring educational games from organizations such as iCivics and Next Gen …

Feedback In Digital Game-Based Learning: A Taxonomy And The Design And Empirical Evaluation Of A Feedback System In A Mathematics Serious Game, André Almo

Dissertations

Digital Game-Based Learning (DGBL) is an active, student-centred pedagogical approach in which feedback plays a central role by informing learners’ actions, guiding decision-making and shaping motivation and engagement. Despite its importance, feedback in serious games is often described inconsistently and insufficiently in research, limiting comparability across studies and the accumulation of design knowledge, particularly for children. This thesis addresses these gaps through two complementary contributions: the development of a taxonomy for feedback design in digital serious games and the empirical evaluation of a taxonomy-informed feedback system in a mathematics game for primary school students. First, this work introduces the Taxonomy …

Mud Sound Speed Profile Constraints From Sub-Bottom Arrival Times, Charles W. Holland

Electrical and Computer Engineering Faculty Publications and Presentations

Arrival times of sub-bottom reflected paths together with co-located direct measurements of the angle of intromission provide narrow constraints on the sediment sound speed profile. Measurements of these two quantities at the central New England Mud Patch in March 2017 indicate that the average sound speed gradient in the upper 3m and upper 9m of mud is 6 s1. Gradients of 5 s1 and 7 s1 over the upper 9m are too small and large, respectively. Below 9m, the sandmud transition interval has a gradient of 200 s1. VC

The Soviet Template And Its Application: Bulgarian State Policy Toward The Bulgarian Orthodox Church After 1944, Ventzislav Gueorgiev Karavaltchev

Occasional Papers on Religion in Eastern Europe

The article examines the adoption and implementation of Soviet models in Bulgarian state policy toward the Bulgarian Orthodox Church following the communist takeover on September 9, 1944. Situating the Bulgarian case within a broader comparative framework, the study traces key continuities between Soviet church–state relations after the October Revolution of 1917—particularly as was institutionalized during the Stalinist period—and their subsequent application in Bulgaria. Drawing on extensive archival materials from Bulgarian and Russian repositories, the article demonstrates that all major decisions concerning the Church were closely coordinated with, and often directly approved by, Moscow. Beyond repression and legal restriction, the analysis …

Gpu Embedded Machine Learning Solar Pv Forecasting (Paper), Hamza Tasneem

Honors Capstone Projects

Author ORCID: https://orcid.org/0009-0009-1665-3966

Paper DOI: https://doi.org/10.62812/DHND6486

Solar Photovoltaic (PV) generation is intermittent and variable in nature, which can threaten the stability and economic efficiency of the power grid. Accurate and precise forecasts could help to mitigate intermittency issues by helping the grid in the allocation of generation resources at times when solar irradiance is low. This paper presents a Convolutional Neural Network (CNN) approach to accurately predict solar irradiance forecast for Brookings, SD area using Clear-Sky Irradiance (CSI) data from the National Renewable Energy Laboratory (NREL), utilizing a sliding-window algorithm and other data processing algorithms. The CNN was trained on …

Gpu Embedded Machine Learning Solar Pv Forecasting (Poster), Hamza Tasneem

Honors Capstone Projects

Author ORCID: https://orcid.org/0009-0009-1665-3966
Poster DOI : https://doi.org/10.62812/MOFI3028

This was poster was developed in support of the paper of the same name.

Paper DOI: https://doi.org/10.62812/DHND6486

Sacbe 1 And Classic Maya Urban Culture, Traci Ardren, Scott R. Hutson, Travis W. Stanton, Patrick Rohrer, Justin P. Lowry

Anthropology Faculty Publications

One of the most significant engineering accomplishments of Maya civilization is Sacbe 1, a raised road connecting the ancient urban centers of Yaxuna and Coba. Using new lidar data in concert with excavation, epigraphic inscriptions, and landscape reconnaissance, we show that settlement and an urban experience emanated westward from Coba along the sacbe. The leaders of Coba - in particular, an ambitious seventh-century queen - used the sacbe to expand the political and cultural influence of their dynasty into the center of the peninsula while securing territory and resources. Gaps in the sacbe, precise delineation of its many curves, and …

Sustainable Pathways For Fish Waste Oil Valorization Into Biofuel: Process Synthesis And Case Study, Hany A. Elazab, Radhi H. Alazmi, Abdelrahman El-Bagalaty, Hossam Tammam, Mahmoud El-Sayed, Mohamed Omar, Fathi Shokry, Mamdouh A. Gadalla, Fatma H. Ashour, Thokozani Majozi

Chemical and Biochemical Engineering Faculty Research & Creative Works

Biodiesel is a promising, sustainable alternative to fossil fuels such as petrol and diesel. Currently, biodiesel can be produced from edible plant oils and non-edible sources and wastes. Notably, fish waste oil is a sustainable resource for transesterification reactions to produce biodiesel. This research proposes a general process design methodology to investigate the potential of biodiesel production from fish waste oil as a pathway for waste-to-energy. The methodology integrates Pinch Analysis principles and process simulation to optimize the energy efficiency of a process design. Real data are collected on fish waste from fish industries in Egypt, focusing on three regions …

Pre- And Postnatal Exposure To Pm2.5 And No2 And Blood Pressure In Children: Results From The Echo Cohort, Yu Ni, Andrew Law, Xingyu Gao, Adam A Szpiro, Christine T Loftus, Miranda Jones, Logan C Dearborn, Marnie F Hazlehurst, Allison R Sherris, Sindana Ilango, Kaja Z Lewinn, Nicole R Bush, Qi Zhao, Leonardo Trasande, Joseph T Flynn, Daniel A Enquobahrie, Ruby H N Nguyen, Tom O'Connor, Arpita K Vyas, Mingyu Zhang, Hooman Mirzakhani, Alison Hipwell, Anne Starling, Alicia K Peterson, Akhgar Ghassabian, Assiamira Ferrara, Judy Aschner, Scott Collingwood, Margaret R Karagas, Michelle Katzow, Annemarie Stroustrup, Mehtap Haktnair, Tina V Hartert, Brittney M Snyder, Sophia Jan, Anne Marie Singh, Dana Dabelea, Angela M Malek, Jennifer K Straughen, Carlos A Camargo, Miatta A Buxton, Rosalind Wright, Kecia Carroll, Keia Sanderson, Daphne Koinis Mitchell, Viren D'Sa, Christine Hockett, Anne L Dunlop, Shohreh F Farzen, Sunni L Mumford, Akram N Alshawabkeh, Hudson P Santos, Xueying Zhang, Zhongzheng Niu, Nan Ji, Carrie Breton, Donghai Liang, Catherine J Karr, Echo Cohort Consortium

Children’s Nutrition Research Center Staff Publications

Background: There is growing interest in understanding the link between early life exposures to ambient air pollution and childhood blood pressure; however, existing findings, largely from single site/cohort studies, are inconclusive.

Methods: We examined the association between exposures to fine particulate matter (PM2.5) and nitrogen dioxide (NO2) and blood pressure measured at age 5-12 years in 4863 U.S. children from 20 pregnancy cohorts of the NIH ECHO cohort. Point-based residential exposures were derived from spatiotemporal models with a biweekly resolution and averaged over each trimester, the whole pregnancy, and child age 0-2 years. We converted systolic (SBP) and diastolic blood …