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 …

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 …

Tourniquet Pressure Gradient Measurement Apparatus, Luis Enrique Perez, Elsa Elizabeth Bates

Biomedical Engineering

The goal of this project was to design a device that would measure pressure gradient data across the width of an elastic and inelastic tourniquet cuff using a human limb model. The main customer requirements that were focused on were to accurately measure the pressure from a tourniquet, keep the cost down, and be easy to use. The targeted design specifications were to read pressure values ranging from 0-400 mmHg, keep the test length under 5 minutes, and to keep the cost of materials under $400. The design of the device ended up consisting of 5 IV pouches that were …

Assisted Delivery Device, Rachel Rowe, Madeliene Mumford, Jenna Eissmann, Brittany Trinh

Biomedical Engineering

Current devices used to assist in complicated births present serious risks to both the mother and the fetus, which has caused a decline in the use of these devices over the last decade. This senior project team has proposed an alternative device that interfaces with the infant’s shoulders that would decrease these risks and contribute to the decrease of unnecessary c-sections due to device inadequacy. This Statement of Work includes research on the downfalls of current devices, existing patents, customer requirements, engineering specifications, and a design plan through December of this year. The next phase of this project will include …

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 …

Auto Adjustable Flow Regulator, Ethan Hemmerlin, Jack Dooley

Biomedical Engineering

The Auto-Adjustable Oxygen Flowmeter device is to be used in conjunction with an oxygen source or reservoir, as well as a low-flow nasal cannula apparatus. The device is applicable for patients requiring an oxygen flow rate of 0-6 L/min. Further, the device works to maintain a healthy blood-oxygen concentration of 90-94% for typical patients, as well as an 88-92% range for COPD patients who are chronic CO2 retainers. A reflective pulse oximeter will record the SpO2 concentration of the patient. The outputted SpO2 concentration will be transmitted to an internal processing PCB from which it will interact with the oxygen …

Hand Tremor Stabilizer, Krishna Sai Bathini, Ryan Herrmann, Madeleine A. Beaupre

Biomedical Engineering

The Hand Tremor Stabilizer project represents a significant advancement in assistive device technology, aimed at improving the lives of individuals affected by hand tremors due to conditions such as essential tremor or Parkinson's disease. Throughout the design process, our team engaged in a comprehensive approach that included rapid prototyping, iterative testing, and direct feedback collection from potential users. This process was instrumental in refining the device to meet specific user needs effectively.

Key customer requirements that guided the design of the Hand Tremor Stabilizer included ease of use, portability, washability, accuracy of motion control, comfortable grip, breathability, a natural feel …

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 …

Improvements Of Hybrid Ac/Dc House Prototype, Arden Abude

Electrical Engineering

This is an iteration from previous designs of the Hybrid AC/DC House with a systematic addition of a portable AC power supply unit. This iteration for the Hybrid AC/DC House is an innovation of independence for sustainable housing solutions. It will serve as an alternative for rural communities needing power to rely on self-sustainable microgrids rather than large-scale AC electric grids. The addition of a portable AC power supply would allow the microgrid to remove its reliance on AC power from the larger grid and would elevate the system to complete energy independence. The microgrid has DC power generated from …

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 …

Finite Element Analysis Of The Bearing Component Of Total Ankle Replacement Implants During The Stance Phase Of Gait, Timothy S. Jain

Master's Theses

Total ankle replacement (TAR) implants are an effective option to restore the range of motion of the ankle joint for arthritic patients. An effective tool for analyzing these implants’ mechanical performance and longevity in-silico is finite element analysis (FEA). ABAQUS FEA was used to statically analyze the von Mises stress and contact pressure on the articulating surface of the bearing component in two newly installed fixed-bearing total ankle replacement implants (the Wright Medical INBONE II and the Exactech Vantage). This bearing component rotates on the talar component to induce primary ankle joint motion of plantarflexion and dorsiflexion. The stress response …

The Impact Of Culture On Construction, Vatulele Uluakiotonga Finau

Construction Management

The aim of this comprehensive exploration is to identify elements within Japanese, Islamic/Arabic, and Tongan cultures that can be implemented into construction practices in California, leveraging their unique values to enhance home design and construction. The study reveals that culture plays a pivotal role in shaping the design and construction of homes, reflecting deeply held values, traditions, and societal norms. Through qualitative research, expert interviews, and a detailed literature review, key elements defining each cultural approach to housing are elucidated. From the emphasis on privacy and natural ventilation in Japanese homes to the integration of modesty and hospitality in Islamic/Arabic …

Effects Of The 2022 California Building Energy Efficiency Standards On New Construction In San Luis Obispo County, Christopher Hoefer

Construction Management

California released the first Building Efficiency Standards, or Energy Code, in 1976 and has updated them every three years. These standards aim at limiting the amount of energy use and greenhouse gas emissions by buildings in the state. California claims that these standards have saved consumers billions on utility bills, but there is limited information on the upfront impact the Efficiency Standards have had on new construction. This study sought to evaluate the impact that the 2022 California Building Energy Efficiency Standards had on new construction in San Luis Obispo County. Interviews were conducted with local specialty contractors in order …

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 …

Tefft Street Corridor Redesign, Andres M. Figueroa

City and Regional Planning

The Tefft Street Corridor Redesign is a proposal for a buffered shared use path along the most significant 1.75 mile portion of Tefft Street located in Nipomo, California. The proposal includes an introduction, background information, existing conditions analysis, regulatory standards analysis, community engagement, conceptual designs, and implementation framework.