Digital Commons Network^™

Hitch Cart “Landing Gear”, Rebekah White, Jose Raygoza, Randy Hernandez, Brandon Leon

Mechanical Engineering

This report aims to allow our sponsor, to review our design process of the Hitch Cart Landing Gear Prototype. In the design overview section of this report, we discuss the primary design modifications we made to the wheel mechanism of the existing hitch cart prototype, including the addition of the ACME screws and the folding brackets. This allows our sponsor to see the intended improvements made to the past prototype and understand the primary goal of our project. Then, in the implementation section, we cover the entire manufacturing process to allow our sponsor to understand what manufacturing steps must be …

Design Of High Efficiency Doherty Power Amplifier, Kobi G. Kelly, Severin Pindell

Electrical Engineering

The project includes design and fabrication of a high efficiency power amplifier for a student design competition held at International Microwave Symposium (IMS) 2023. Efficient power amplifiers are critical for base station communication requiring efficient use of available power. The final design optimizes power added efficiency (PAE) and linearity. The amplifier will operate at 2.45 GHz. Competitive PAE above 50%, and C/I above 30 dB is achieved by leveraging a Doherty class amplifier using accurate discrete CGH4006P transistor models to simulate an efficient and linear design. Unique design features include optimal transistor bias point selection and power split ratios between …

Sports Broadcasting In 2024: Analyzing The Transition From Linear To Connected Tv With An Emphasis On Sports Streaming, Noah Benjamin Holiber

Journalism

The ongoing movement away from linear television (broadcast and cable) towards connected TV (streaming services) has boosted popularity amongst streaming services greatly. Since the inception of the streaming services, sports have remained a linear TV attraction. However, the continued evolution of this transition has reached a tipping point characterized by rapidly intensifying competition between streaming platforms for sports programming. The “streaming wars'' will drive an increase in the overall value of sports media rights and fundamentally alter sports programming consumption behavior. Popular streaming services continue to bid for the rights to broadcast sports games. This paper will examine trends in …

Assessing The Efficacy Of Hydraulic Pumping As A Remediation Method Of A Subsurface Light Non-Aqueous Phase Liquid Spill In Arroyo Grande, California, James M. Raney

Master of Science in Environmental Sciences and Management Projects

The efficacy of hydraulic pumping as a remediation method of a petroleum, or Light Non-Aqueous Phase Liquid (LNAPL) spill in Arroyo Grande, California will be assessed by determining aquifer properties, assessing the chemical properties of the contaminant, recovering the contaminant from the subsurface, and proposing alternative remediation techniques. Soil, groundwater and contaminant characteristics, cumulative volume of LNAPL skimming test data, pumping rates, and LNAPL thicknesses in wells installed within the contaminant plume were collected. Sediments around the LNAPL source are contaminated with hydrocarbons in the gas and diesel range. Pumping efficacy is expected to continue to decrease at the site, …

Agriculture In The Middle School Classroom, Amy Prescott

Agricultural Education: Graduate Internship Reports

This internship consisted of substitute teaching in the San Luis Coastal Unified School District. Regular teaching assignments at Los Osos Middle School developed into a project designed to infuse agricultural concepts in core subjects at the school. The project involved developing lessons to be taught in humanities courses. Determining the impact of teaching agricultural content in the courses was included as a part of the project.

Engineering An Injectable Hydrogel With Self-Assembling 3d Vasculature, Kendyl Cohn

Master's Theses

This research developed methods for culturing self-assembling capillaries in an injectable gel as a potential method for vascularizing tissue-on-a-chip models to mimic physiological drug delivery. Additionally, a mathematical model was developed as a tool for understanding nutrient delivery and comparison of potential delivery systems. Organs-on-a-chip provide novel platforms for studying biology and physiology in 3D, allow exploration of tissue engineering on a manageable scale, and serve as models for drug screening and drug-delivery testing.

Methods were first developed for co-culture of endothelial cells and fibroblasts (3T3s or HDFs) in 2D, evaluating culture time, seeding density and ratio of HUVECs and …

A User-Centric Continuous Authentication Modality Evaluation And Selection Scheme, Bharath R. Senthilkumar

Master's Theses

One of one-time authentication’s most prominent vulnerabilities is the possibility of lunchtime attacks. In such scenarios, an adversary could exploit an unattended device with an active session and no measures are taken to prevent them from committing malicious acts. To address this issue, continuous authentication is utilized by continuously verifying whether an individual is a device’s rightful owner through various modalities, with data sourced from sensors. In the current body of research within this rising domain, various single-modal and multi-modal continuous authentication systems exist, that focus on employing unique combinations of modalities and improving existing supervised learning models used to …

Manufacturing Silicone In-House For The Creation Of Customized Neurovascular Blood Vessel Mimics, Jacob Wilbert Perisho

Master's Theses

The Tissue Engineering Lab at California Polytechnic State University San Luis Obispo focuses on creating tissue-engineered Blood Vessel Mimics (BVMs) designed for the preclinical testing of neurovascular devices. These BVMs are composed of silicone models, representing anatomically accurate neurovasculatures, that are sodded with vascular cell types and then cultivated in bioreactors (which maintain physiologic conditions). These silicone models are currently sourced externally from industry partners, so the primary goal of this thesis was to develop the means and methods for the Tissue Engineering Lab to manufacture silicone models in-house.

The first aim of this thesis was to develop and explore …

Political Orientation And Its Effect On Engagement And Perception Of The Arts, Parker Robert Mckenzie

Communication Studies

Utilizing the Symbolic Interactionism Theory (Gusfield, 2011), this study explored the relationship between political orientation and one’s engagement with and perception of art forms. The study utilized qualitative methods analysis to analyze similarities between participant responses. Findings from participants revealed the following themes: engagement with history leading to a more profound understanding of art, art causing real-life inspiration, and engagement with art leads to the formation of sub-cultures. Additionally, interviews revealed that people choose not to engage with certain art based on political orientation, people who consider themselves to be “spiritual” engaged with art differently, and many people’s perception of …

Exploring Podcasting As A Medium For Sharing Modern Issues With College-Age Demographics, Arabel Grey Meyer

Journalism

This paper examines the medium of podcasting and creating a personal brand through this medium. While analog forms of broadcast media such as television and radio were some of the most common sources of the public’s information until around the 1960s, technological advances and the creation of the internet drastically changed the way that the public absorbs and accesses its information. Media serves to provide several key roles in our society: entertainment, education, providing a platform to discuss issues, and serving the role of a watchdog for institutions and governments (2016). Podcasting, as a modern media form that has become …

Atascadero Little League - Snack Shack Window Renovation, Anthony J. Catania

Construction Management

Atascadero Little League is an essential part of the local community. It brings families together and provides youth with a place to develop their social skills, sportsmanship, and discipline all while getting outside and exercising. Little leagues are non-profit organizations, managed and operated by volunteers, who sacrifice personal time to give back to their local community. Paloma Creek Park is where Atascadero Little League hosts most of their games. The snack shack’s service window does not face the baseball field, forcing volunteers to rely on a small window in the side of the structure to view their child’s game. The …

Cal Poly's Old Powerhouse Analysis Assessing Stakeholder Preferences, Marissa D. Burns

Construction Management

This research paper delves into the historical and cultural relevance of Cal Poly’s Old Powerhouse, the college’s oldest architectural landmark, which has remained in a state of disuse since the 1990s. Employing meticulous survey methodology; perspectives from faculty, staff, alumni, students, and community members are gathered to illustrate the significance of the Old Powerhouse within the various stakeholders. The study refrains from imposing interpretation but rather seeks to capture the sentiments expressed by stakeholders, providing valuable insights into the building’s perceived value. By centering on the community opinions, the research will underscore the building’s potential and expand on the collected …

A Rhetorical Criticism Of "Fleabag": Tragicomedy And What It Means To Be A Feminist, Morgan Ashley White

Communication Studies

This essay conducts a rhetorical criticism of the television series Fleabag, analyzing how creator and star Phoebe Waller-Bridge uses tragicomedy to dismantle the notion that there is one right way to be a feminist. After providing background on Waller-Bridge, the history of feminism, and the creation of Fleabag, the essay closely examines several key scenes from the show. It demonstrates how Waller-Bridge employs humor intertwined with serious subject matter to highlight the complexities and contradictions women face in navigating conflicting societal expectations around gender. Through the flawed yet honest portrayal of Fleabag herself and her interactions with other nuanced female …

Development Of An In Vitro 3-Dimensional Co-Culture Human Colorectal Cancer Model In Microfluidic Devices, Abby Jens

Master's Theses

Colorectal cancer is the second most common cause of cancer-related deaths in the United States, with the relative 5-year survival rate for distant stage cancer being only 14%. The most common treatment for colorectal cancer is with chemotherapeutic drugs; however, the discovery of these drugs is costly, time-consuming, and often requires the use of animal models that do not yield results that translate to clinical trials. Due to these shortcomings, researchers seek to develop physiologically relevant in vitro tumor models that more accurately mimic the tumor microenvironment for cheaper and faster high-throughput drug screening. The aim of this research was …

Comparison Of Scanning Electron Microscopy And Confocal Laser Microscopy For Tissue Surface Roughness Characterization, Tarnvir Dhaliwal

Master's Theses

It was found that the measurements captured by confocal microscopy and scanning electron microscopy had a statistically significant difference for bovine tissue. There was not a statistically significant for porcine and poultry tissue.

The intent of the study is to perform a comparative study to examine efficacy of two distinct technologies for a singular purpose: tissue surface roughness characterization. The two technologies compared are a confocal reflectance microscope and a scanning electron microscope. The comparison was made by comparing two surface roughness parameters [Ra and Rq] within ImageJ.

The study examined three different animal species [porcine, bovine, and poultry] to …

Neonatal Respiratory Therapy Interface, Kennedy Austin, Evan Manley, Parker Murray, Harrison Oen

Biomedical Engineering

This Final Report reviews and outlines the scope, objectives, and deliverables for the BCPAP Interface Redesign project, aimed at enhancing the functionality, usability, and patient experience of the existing BCPAP interface. It also includes detailed testing results and manufacturing plans for the device prototype. The current system has challenges in universal usability, time constraints, and patient comfort, which this project intends to address effectively. The goal of this project is to reevaluate and redesign the interface of the bubble continuous positive air pressure (BCPAP) machine’s attachment site with the infant. Due to the millions of premature neonates and thousands of …

Implementation Of Fluid Viscous Damper For 2023 Eeri Seismic Design Competition, Dalton J. Muck, Payton S. Mcgee, Payton R. Filippin, Tynan Castro

Architectural Engineering

The authors of this report were a part of the 2023 Earthquake Engineering Research Institute (EERI) student chapter for California Polytechnic State University, San Luis Obispo (Cal Poly). With thirteen other team members, they traveled to San Francisco, CA to compete in the Seismic Design Competition (SDC) hosted by EERI. The team was tasked with preparing a written proposal, design and computer analysis of the structural system, construction of two physical models, as well as creation of a poster and a presentation for a proposed mid-rise building located in the competition host city. The goal of the design of Cal …

Plc Course Development, Leonard Hernandez, Jacqueline Grace Radding

Electrical Engineering

The goal of this project is to design and construct the first lab experiment for the newly developed EE435 laboratory course. The experiment entails PLC programming to automate LED lighting in a simulated building. Starting with why PLCs are used, how to use the interface of EcoStruxure Control Expert V15.0 and practice using logic to control the dimming of a Light Emitting Diode (LED) to sustain a certain number of lumens consistent in a zone. Through the lab manual developed in this project, students will gain experience of creating logic designs using Function Block Diagram (FBD) and learn the layout …

Grc Dei Handbook, Lauryn J. Kim

Graphic Communication

The GrC Student Advisory Board developed a DEI Committee consisting of student members and faculty advisors to amplify resources and equal opportunities for the department in the Spring of 2023. For the Graphic Communication major at Cal Poly San Luis Obispo, having a DEI Committee is valuable for several reasons, particularly given the context of Cal Poly lacking diversity. In fact, Cal Poly is considered the only predominantly white institution of the 23 CSU campuses, and also the whitest public university in California. A DEI Committee in GrC significantly contributes to creating a more inclusive, productive, and innovative environment in …

To&From Cards, Rachel S. Matatyaou

Graphic Communication

The goal of my senior project is to create a greeting card business from scratch, utilizing the design and marketing skills acquired through my Graphic Communication courses. The initial phase involves designing 20 cards spanning various topics and messages. The card categories will include but are not limited to birthday, get well soon, thank you, graduation, congratulations, condolence, special events or holidays, and customizable options. The project as a whole encompasses designing, branding, physical production, establishing a platform for sales, and lastly executing the sales process. Despite the ambitious nature of this project, it presents a unique opportunity to apply …

Art From Scrap: Rebranding & Marketing, Lexanna Schultz

Graphic Communication

Art from Scrap is a creative reuse store that provides low-cost supplies for all kinds of craft-related hobbies (Explore Ecology, 2024). In general, art supply thrift stores help divert thousands of pounds of usable materials from landfills, and makes creative hobbies more accessible in terms of cost (Remainders, 2024). Art from Scrap’s initiative to extend the life cycle of craft supplies helps reduce unnecessary waste, however they currently do not have strong branding, and their limited marketing materials are inconsistent.

Modernizing Poshmark, Saisri Rayapati

Graphic Communication

Currently, Poshmark, an app for users to buy and sell secondhand clothing and other goods is known for its good deals but also a platform that is difficult to navigate. Without many updates done to the app’s layout in the past decade, it has left it crowded and confusing for new users not already familiar with the platform. The main objectives of this project are to create a prototype, and redesign the app so that it is organized, easy to use for buyers and sellers, and has stronger personalization.

Grc: A Mustang Quest, Jackson T. Alexander

Graphic Communication

The main purpose of this study is to define the overall effectiveness of visual marketing through animation and storytelling narration. California Polytechnic State University, San Luis Obispo has dozens of potential majors that interest students, thus leading to specific programs such as Graphic Communication (GRC) gaining fewer numbers compared to other College of Liberal Arts (CLA) fields. By analyzing what key elements are necessary for gaining outside attention and intrigue about a college program, I can better understand what information needs to be presented in my video project. This video will focus on defining what Graphic Communication is as a …

Long Story Short, Hannah M. Varghese

Graphic Communication

Long Story Short and is a vintage up-cycling art brand. Our mission is to breathe new life into vintage pieces, crafting them into modern wearable art. As the name suggests, each creation tells a story while being revitalized for today’s fashion forward community.

Fast fashion and trend cycling has been a growing problem in today’s society. Things are going ‘in’ and ‘out’ quicker than they ever have. Trend cycling usually operates on a 20-year timeline. But, today’s sped up cycle encourages people to constantly over-consume in chase of the next cool thing. It’s unsustainable and an impossible chase. With a …

Spotlight Magazine, Avery Brunsman

Graphic Communication

In response to challenges faced during the Covid-19 pandemic, the Political Science (POLS) department at Cal Poly halted the distribution of its annual publication, Alumni Connections. Recognizing the need for a more captivating and accessible platform, the POLS department initiated a project to revive the publication. For my senior project, I will be leading design efforts for this new publication entitled Spotlight. Through this project, I plan to revitalize the magazine into a dynamic quarterly newsletter, balancing brevity and frequency to effectively connect with the target audience.

Water Quality Assessment For San Luis Obispo Creek And Stenner Creek, Brent Flemmer

Master of Science in Environmental Sciences and Management Projects

Water quality was assessed in five stream segments in San Luis Obispo and Stenner Creeks in Spring of 2023. Two of the five sites were located along San Luis Obispo Creek, and three located along Stenner Creek. Criteria to evaluate these aquatic systems was provided by the Standard Operating Procedures of the Surface Water Ambient Monitoring Program, formulated by the State Water Resources Control Board. These procedures describe the methodology surrounding the collection of chemical, physical, and biological parameters of stream systems; streamflow, substrate, flow habitat, chemical water quality, and benthic macroinvertebrates are some of the criteria collected that allows …

Ux/Ui Hub: User Experience/User Interface Information Hub For Navigating College, Sydney Yae-Rhee Leia Kong

Graphic Communication

The User Experience, User Interface (UX/UI) industry has grown exponentially in the last couple of years. According to a PubMed Central journal article, Understanding UX Better, UX has attracted an increasing interest in recent years, extending the views on usability. This growth exists both in academic institutions and the technology industry, evidenced by increasing numbers of UX-related degrees at undergraduate and graduate levels and also by high job demand (Marques). With this new emergence, the Graphic Communication (GrC) major, specifically the concentration in UX/UI, has caught the attention of numerous prospective Cal Poly SLO students interested in front-end design and …

Prep, Cook, Eat! Cookbook, Mayson Rutsky

Graphic Communication

As a young adult, specifically a college student, finding the time, effort, and money to cook delicious and nutritious meals can be extremely difficult. The stereotypical young adult will gravitate to the frozen section of grocery stores simply because of how efficient they can be. However, eating solely frozen food is not satisfying or very healthy. Because young adulthood is the first time most are living on their own, it is also the first time they only have themselves to rely on for cooking meals. With little to no experience, it can be daunting to enter the kitchen and try …

Sappling: An Interactive Platform For Creative Expression And Collaboration, Alex Aquino

Graphic Communication

Sappling is a new application that aims to tackle some of the shortcomings of traditional social media, which currently dominates the way we interact with friends and other users online. In its initial phase, we plan to target a certain demographic of people that we feel would benefit most from the platform, such as engineers or musicians. As a part of my project, I plan to help identify which group we want to target in this development stage, using survey data and other metrics to measure different groups and their likelihood to benefit from this new platform. As some research …

Racialization, Individualism, And Denial: How The American And Australian Dreams Uphold The Homelessness And Poverty Crises Of Today, Emily Rose Andrews

Social Sciences

Inspired by my lived experience of immersion in the Tenderloin neighborhood of San Francisco, California, for two weeks; studying abroad in Adelaide, South Australia, for two months; and my current internship at the Department of Social Services in San Luis Obispo, California, I plan on formulating a research paper on the topic of homelessness for my senior project. Specifically, through an extensive literature review and analysis, I will investigate: How does the culture of poverty ideology influence public opinions and policy responses to homelessness in the United States and Australia? To answer this question, I will first introduce the concept …