Digital Commons Network^™

Evaluating Smartrock Temperature Sensor Performance In Measuring Concrete Strength, Jack Dasch

Construction Management

Concrete testing is one of the most important parts of the concrete placement process. Traditionally, this is done through the use of 6x12 cylinders cured in a lab that are broken at various stages of the curing process. These cylinders are not necessarily representative of the in-situ concrete because of their differing curing conditions- indoors versus exposed to the elements. Wireless temperature sensors, like Giatec’s SmartRock, have the potential to determine concrete strength based off the temperature of the placed concrete over time, thus eliminating the need for cylinder breaks. Once calibrated to the specific mix design, these wireless sensors …

Comparison Study Of Laboratory Testing Programs Exploring The Influence Of Initial Static Shear Stress On Liquefaction Triggering, Micaela Saqui

Master's Theses

Current state of practice for calculating liquefaction triggering and deformations is outlined in multiple published articles (Seed 1971, Youd et al. 2001, Idriss and Boulanger 2008, National Academies of Sciences 2016, etc.). These methods use a factor of safety analysis with the cyclic stress ratio (the cyclic stress caused by the earthquake normalized by the effective vertical stress in the soil) and the cyclic resistance ratio (the resistance of the soil normalized by the effective vertical stress in the soil). These cyclic ratios are calculated first for free-field sites (no external forces on the soil), then correction factors are used …

Poly Under Pandemic: A Pilot Survey Examining Cal Poly Slo’S Student Body During The Covid-19 Pandemic, Brett Vollrath

Journalism

The following is a survey of Cal Poly SLO students and alumni who had attended the university while major pandemic restrictions were in place. The paper is based around a pilot survey and data set.

The introduction provides background on the problem and how this survey was prepared.

The literature review details research conducted during the pandemic, which was used to guide the survey's focus questions.

The survey section details the questions asked of respondents. Respondents were first asked demographic questions to establish reference points. They were then asked questions on different aspects of student life, such as mental health, …

Accessibility Rating Form For Websites And Other Online Platforms, Ethan Wu, Jafra D. Thomas, Regina F. Hockert, Jasmine C. Wong, Samantha M. Ross

Kinesiology and Public Health

Background. This file provides a coding form developed to judge how accessible websites and other online platforms are to users. Accessibility may be defined as the ease to which a person can perceive content and navigate material (Ross & Ross, 2021). Users are encouraged to adapt this form for their use.

Purpose. The rating form can be used to judge the pages of online media, using 14 criteria under two areas: Accessible Media and Accessible Design. One of three grades could be assigned to each criterion: Not Accessible (0 point), Somewhat Accessible (1 point), Accessible (2 …

Enlightening The “Dark Ages”: Historical Genealogy And The Medieval Narrative, Jess R. O’Leary

The Forum: Journal of History

No abstract provided.

“She May Look Clean, But—”: Venereal Disease In The U.S. Military During World War Ii, Emma Lukin

The Forum: Journal of History

No abstract provided.

Environmental Justice Mapping In The U.S. Pacific Island Territory Of Guam, Ben Rocha

Master of Science in Environmental Sciences and Management Projects

Academics, regulators, and the public currently use geospatial analysis tools to identify locations that may be candidates for further environmental justice review in the continental United States (U.S.). However, current environmental justice geospatial analysis tools overlook a small but significant portion of the U.S. - the U.S. Pacific Islands. This study analyzes environmental justice within the U.S. Territory of Guam using existing geospatial analysis methods and publicly available environmental, climate, and socio-economic data to: (1) Spatially map relevant demographic and environmental data and (2) determine the correlation, if any, between the exposure to environmental hazards and the socio-economic status of …

Abbott Cardiac Electrophysiology Wet Lab Project, Melissa Kurani, Fiona Lynn

Biomedical Engineering: Graduate Reports and Projects

Cardiac mapping systems provide electrophysiologists with pertinent information about ablation treatment plans for patients who suffer from cardiac arrhythmias. This thesis describes the process of designing a functional wet lab that integrates with Abbott’s EnSite Precision 3D Mapping System, with the purpose of providing Cal Poly students and faculty with an opportunity to have a hands-on learning experience with cardiac mapping. This project encompassed a thorough literature review of cardiology, electrophysiology, and in vitro lab systems, followed by the design, manufacturing, and evaluation of a functional and anatomically representative wet lab. This is a continuation of previous master’s projects that …

Analysis Of Current And Future Flood Hazard In The Sacramento-San Joaquin Delta, Nicholas L. Mcguire

Master's Theses

The primary motivation of this study is to estimate the current and future flood hazard throughout the Sacramento-San Joaquin Delta in the context of sea-level rise. I also analyzed the effects of storm surge and river flow on extreme events to better understand how these events originate and vary spatially and in time. To address this goal, I combined digital water level records (primarily 1983-present) with archival data collected by the California Department of Water Resources (1929-1983) to reevaluate flood hazard in the Delta and investigate the possible sensitivity of the region different sea-level rise projections. Available archival records from …

Determination Of Fungicide Resistance In Botrytis Cinerea On Wine Grapes In California's Central Coast Region, Evelyn Alvarez-Mendoza

Master's Theses

Botrytis bunch rot, caused by Botrytis cinerea, is a fungal disease that primarily affects the fruit of wine grapes. Infection of fruit consequently results in reduced yields and wine quality. These factors lead to significant economic losses for growers which prompts the implementation of management practices to control the disease. One objective of this study was to evaluate the level of resistance that populations of B. cinerea in the Central Coast region showed to various chemicals. A fungicide assay was conducted to determine resistant phenotypes to six fungicide active ingredients (pyrimethanil, iprodione, fenhexamid, fludioxonil, trifloxystrobin, boscalid). Thirty-five (2020) and …

Hydrologic Response Of Little Creek To The 2020 Czu Lightning Complex Fire At The Swanton Pacific Ranch, Kylie E. Dupuis

Master's Theses

In this study, stage, streamflow, and precipitation data was collected from small watersheds in the Swanton Pacific Ranch for the first two hydrologic years following the 2020 CZU Lightning Complex. The Little Creek watershed was setup for high-resolution data collection with four separate stage gauge sites (Main Stem, North Fork, South Fork, and Upper North Fork) and four rain gauge sites (Al Smith House, Ridgeline, Upper North Fork, and Landing 23). Stage gauge sites were also established at Queseria, Archibald, and Mill creeks. Preliminary post-fire rating curves were developed for the four sites of Little Creek. The Main Stem (MS) …

An Inexpensive Maximum Power Point Tracking System For An Insulated Solar Electric Cooker Using An Off-The-Shelf Buck Converter, Andrew A. Perez

Physics

A specialized control circuit using an off-the-shelf buck converter is built for an Insulated Solar Electric Cooker (ISEC). Cost and efficient power delivery are the focus. An ISEC is synonymous to a direct load heat resistor, allowing a specific maximum power point tracking (MPPT) algorithm and fewer components. Only a microcontroller, voltage sensor, and digital-to-analog converter are used with the buck converter to maximize the power delivered by a 100W solar panel for the 3.3Ω load.

How It's Made: The Crime And Kombucha Podcast, Melissa Nemeth

Journalism

The goal of this senior project is to write, produce, edit and market a podcast through the application of skills acquired throughout the culmination of a Cal Poly journalism degree. The podcast created in conjunction with this senior project is called Crime and Kombucha. Crime and Kombucha is a true crime and pop culture podcast hosted by two bubbly best friends, Marcela Cabral and Melissa Nemeth. It explores the relationship between true crime and pop culture, both of which cannot exist without the other in modern internet culture, using one genre to understand the other. In fact, the “Kombucha” …

Leveraging Lessons Learned From A Virtual Hands-On Outreach Program To Cultivate Diversity In The Next Generation Of Structural Engineers, Anahid Behrouzi, Nicole Buck, Sarah Navias

Architectural Engineering

A challenge that continues to face the structural engineering (SE) profession is the recruitment and retention of individuals from underrepresented minority (URM) groups, underscored over the years by findings reported on by the SE3 project committee. One approach to address this is by developing and conducting early outreach efforts with diverse populations of K-12 students, so they are aware of SE’s meaningful contributions to society and the intriguing technical problem- solving opportunities in this field. During these educational activities it is also important for young students to be exposed to engineering practitioner-educators who represent diverse backgrounds and whose lived experience …

The Importance Of Street Lighting: A Study In San Luis Obispo, Kaitlyn P. Lam

City and Regional Planning

The purpose of this report is to shed light on the importance of resident and student safety in the City of San Luis Obispo. The report goes over exact locations of frequently used areas in the City of SLO that lack street lighting. By spreading awareness, studying different lighting types, and getting citizen input, it helps to plan out a method of bettering San Luis Obispo’s streets. The report presents information on efficient and cost-effective lighting in order to integrate them into a location specific proposal that the city could utilize. By the end of the report, readers will be …

A Study Of Pressure Probe Response In Steady And Unsteady Flows, Michael T. Charonnat

Master's Theses

The objective of this thesis is two-fold: to analyze the directional calibration of a 3-hole probe in steady flow and to develop a method for the interpretation of measurements recorded with a novel, fast-response Pitot-type probe in unsteady, turbulent flow. Calibration data for the 3-hole probe’s two side ports was taken in the steady, non-turbulent region of a free jet and was evaluated for symmetry. In addition, data that was recorded using one side port in two independent calibration runs was compared to study repeatability. Misalignment was found between the nominally symmetric data sets, which may be the result of …

Construction Of Modular Concrete Footings For Use In Cal Poly’S High Bay Laboratory, Tyler W. Giddens

Construction Management

This project-based senior project had the end goal of creating two concrete modular foundations that can be used in the High Bay Laboratory for testing procedures. The concrete modular blocks are 6’ long by 3’ wide, and 1.5’ tall. The foundations each held 100 embeds. Each embed serves as an anchor point for various attachments for testing purposes. This was an interdisciplinary project amongst two CM students and one ARCE student. The ARCE student was responsible for the design of the blocks, encompassing the formwork and the rebar. The CM students were responsible for estimating, scheduling, and the construction of …

Differing Moisture Content In Concrete And Mitigation Methods: Research Of Sacramento, Taylor S. Tonda

Construction Management

The city of Sacramento and its concrete foundations face one of the most challenging conditions in the flooring industry, high RH Moisture. RH Moisture or Relative Humidity Moisture is one of the main causes for flooring systems to fail. The source of High RH Moisture consists of surrounding geographic features like rivers, flood plains, and elevation, as well as improper or nonexistent use of a vapor barrier beneath the concrete foundation. Mapping and other data is used to support these claims. If a flooring system is not properly prepared for high RH Moisture levels, issues such as bubbling, delamination, and …

A Parametric Study Of The New Wood Diaphragm Design Force Methods, John Lawson, Emily Taylor

Architectural Engineering

Since the introduction of seismic design provisions in U.S. building codes and standards, a single generally-accepted method has existed for determining seismic design forces on diaphragms. Recently, an alternate procedure was introduced in the Minimum Design Loads and Associated Criteria for Buildings and Other Structures (ASCE 7-16) (ASCE, 2016), and an additional alternate procedure is introduce in its next edition ASCE 7-22 (ASCE, 2022) for single-story rigid-wall flexible-diaphragm (RWFD) buildings. Suddenly the determination of seismic diaphragm forces has become a much more complex choice. The two newer alternate methods are based on better predictive modeling research; however, it is of …

Ethical Extensionism Defended, Joel P. Macclellan

Between the Species

Ethical extensionism is a common argument pattern in environmental and animal ethics, which takes a morally valuable trait already recognized in us and argues that we should recognize that value in other entities such as nonhuman animals. I exposit ethical extensionism’s core argument, argue for its validity and soundness, and trace its history to 18th century progressivist calls to expand the moral community and legal franchise. However, ethical extensionism has its critics. The bulk of the paper responds to recent criticisms, including (1) environmental ethicists’ objection against its austere conception of moral value (2), feminist ethicists’ claim that extensionism fails …

A Review Of Black Appetite. White Food.: Issues Of Race, Voice, And Justice Within And Beyond The Classroom, Dominik Drabent

Feminist Pedagogy

Black Appetite. White Food.: Issues of Race, Voice, and Justice Within and Beyond the Classroom by Jamila Lyiscott addresses the power dynamics educators face while teaching their students of color. The author provides insights and a theoretical framework that supports educators in reflecting upon their practices within an educational system entrenched in white privilege. Lyiscott explains ways in which many educators re-perpetuate oppressive power structures and thereby feed into the Black appetite, white food dynamic. This book serves as a wonderful tool for educators to reevaluate their own practices in order to assure themselves that they do serve their students …

Crime-Fighting Heroes And Pretty Caped Crusaders: Classroom Content Analysis Of Children’S Halloween Costumes, Alexandra Hendley

Feminist Pedagogy

The content analysis activity described in this article allows students to investigate the gendered meanings in marketing materials for children’s Halloween costumes. What lessons about gender are relayed through materials such as these? Existing research has shown that costumes are often gendered in traditional, stereotypical ways. However, rather than being passive recipients of research findings, students participating in this activity get to “do” scholarly work and examine data firsthand. This process of discovery is the hallmark of inquiry-guided learning and is also central to feminist pedagogy. For this activity, students are provided with a set of children’s Halloween costumes to …

Teaching Global Citizenship In Tense Times: Promoting Inclusion And Equity Through The Liberal Arts, Molly Krueger Enz

Feminist Pedagogy

No abstract provided.

Bad Sex Ed: First-Day Icebreaker For Classes On Sex And Sexuality, Alice Rutkowski

Feminist Pedagogy

The author describes a short teaching activity meant to precede the introduction of assigned course material that includes sexually explicit materials. Students are questioned about their experience with sex ed in their K-12 schooling in order to demonstrate the paucity of vocabulary, evidence-based information and even comfort level that most adults have with this material.

Harnessing Your Feminist Rage: A Multimedia Assignment For Upper-Level Courses, Caitlin E. Lawson

Feminist Pedagogy

"Harnessing Your Feminist Rage" introduces a three-part multimedia assignment that encourages students to think critically about feminist anger, particularly as refracted through social media. First, students introduce and analyze a media text or phenomenon that made them angry and reflect upon that anger. Then, using whichever online medium they choose, students call out the offender and express their anger to the audience of their choice in order to meet a specific goal. Finally, students reflect on their expression of anger and their experience creating their response. Overall, the goal is for students to combine their knowledge of feminist theories and …

Spatial And Temporal Characteristics Of California Commercial Fisheries From 2005 To 2019 And Potential Overlap With Offshore Wind Energy Development, Yi-Hui Wang, Ryan K. Walter, Crow White, Benjamin I. Ruttenberg

Physics

As climate change accelerates and fisheries management continues to evolve, California's commercial fisheries are changing. To improve the understanding of recent California fisheries dynamics, we compiled and analyzed commercial landings receipts to characterize temporal and spatial variation in landing and value of key fisheries groups within the exclusive economic zone across the state from 2005 to 2019. We found that California fisheries continue a shift first observed in the 1980s from higher‐biomass, lower‐value species, such as coastal pelagic species and market squid, toward lower‐biomass, higher‐value species, such as Dungeness crab Cancer magister and groundfish. Over the 15‐year time series analyzed, …

Testing The Reliability Of Civic Science Data Collection Of Plant Traits In A Perennial Sunflower Domestication Experiment, Robyn A. Brooks

Master of Science in Environmental Sciences and Management Projects

Civic science has been prevalent in environmental science for many years. The use of volunteers and the community as a helping hand in research continues to link society and science, as well as increases the magnitude and breadth of environmental studies. Assessments of data quality produced by civic science is an important component in validating the accuracy and reliability of the research. In this study, the reliability of civic science was tested by assessing the variation within data gathered from undergraduate Cal Poly students. Using a common garden experimental set up, the health of twelve wildtype silphium genotypes were assessed …

Smart Spine Tape: Active Wearable Posture Monitoring For Prevention Of Low Back Pain And Injury, Samuel J. Borda

Master's Theses

Back pain and injury are a global health issue and are a leading cause of work and activity absence. Prevention would not only save those affected from the burden of pain and discomfort, but would also save people from loss of over 290 million workdays annually and save the healthcare system billions of dollars in expenses per year. Successful research and development of a wearable technology capable of comprehensively monitoring spinal postures that are leading causes of back pain and injury can result in prevention of mild to severe back pain and injury for high-risk people. To accomplish this, the …

Using Portable X-Ray Fluorescence To Predict Physical And Chemical Properties Of California Soils, Micaela D. Frye

Master's Theses

Soil characterization provides the basic information necessary for understanding the physical, chemical, and biological properties of soils. Knowledge about soils can in turn be used to inform management practices, optimize agricultural operations, and ensure the continuation of ecosystem services provided by soils. However, current analytical standards for identifying each distinct property are costly and time-consuming. The optimization of laboratory grade technology for wide scale use is demonstrated by advances in a proximal soil sensing technique known as portable X-ray fluorescence spectrometry (pXRF). pXRF analyzers use high energy Xrays that interact with a sample to cause characteristic reflorescence that can be …

Lift Fixture Control System, Steven Ly

Mechanical Engineering

The Final Design Review (FDR) reports on the senior design project undertaken by a mechanical engineer senior at California Polytechnic State University, San Luis Obispo. The project seeks to assist Maxar’s need for a lift fixture for their spacecraft that will locate its center of gravity and move the pick point directly over the center of gravity (C.G.). This will allow the crane to attach to this point and lift the spacecraft without any swinging motion that could damage the spacecraft or harm personnel working near it. Their current solution is creating a new lift sling for each time they …