Digital Commons Network^™

Survey And Design Of Microwave Low-Noise Amplifiers, Omri Yaari, Pavin Virdee

Electrical Engineering

This project is a contest entry in the Wide In-band Receiver area of the 2020 International Microwave Symposium, 5G Low Noise Amplifier Competition [1]. The project includes RF transistor selection, single, two-stage, and cascode models, and RF parameter optimization to maximize the IMS Competition figure of merit along with a supplemental figure of merit [2]. 5G technologies (used in cellphones, IoT, etc.), first introduced in 2018, are on the rise in current society. Fifth generation hardware requires extended capabilities in comparison to 4G (5-20MHz bandwidth EU: 0.6-2.6GHz), including the newly allocated sub 6GHz frequency bands (EU: 3.4-3.8GHz) and wider bandwidth …

Solar Photovoltaic Iv Curve Tracer, Jonathan W. Skelly

Electrical Engineering

The Solar Photovoltaic Current-Voltage (IV) Curve Tracer, sponsored by Cal Poly Professor Dale Dolan, characterizes solar array current vs. voltage curves for any given temperature and irradiance. The curve tracer is battery powered, and functions autonomously across loading conditions from short circuit to open load on any sub-450-watt solar array. The curve tracer supports separate data logging modes for both single cells and single modules to maximize data accuracy for each. For testing full strings of solar panels, up to 10 IV curves may be stored in persistent EEPROM memory. Stored data may be recalled later for output to a …

Optimization Of Single Axis Tracker Settings In The Cal Poly Goldtree Solar Farm, Charles A. Studdard, Liliana Reyes

Electrical Engineering

Solar farms use direct sunlight when operating; additionally, solar modules produce the most energy aligned perpendicular to the sun. Single axis solar tracking systems allow the rotation tilted photovoltaic panels to rotate during the day, maintaining the panels at the utmost efficiency angle. Achieving maximum power generation and reducing shade on the panels, make it crucial to have constant optimum positioning. Larger farms contain multiple rows and columns leading the panels to cast shadows on one another. Backtracking happens when you eliminate or reduce shadow casted on panels from adjacent modules. Panels positioned equidistantly and on even terrain allows backtracking …

Led-Based Solar Simulator, Jonathan E. Honrada

Electrical Engineering

Solar simulators are great laboratory tools that help users conduct tests with solar cells indoors. Conventional solar simulators typically use xenon arc bulbs as a light source, which can have considerable disadvantages. Recent projects have sought to design and implement LED-based solar simulators, as they are more power-efficient, inexpensive, and durable.

Based on these advantages, the goal of this project is to create an LED-based solar simulator that can replicate the characteristics of solar light, but also be tunable with controls. This broadens the testing capabilities of the device, allowing users to conduct tests with more narrow spectrums of light …

2021 Department Of Energy Collegiate Wind Competition Electrical System, Grayson Capers, Shane Alayvilla, Justin Rodrigues

Electrical Engineering

In this work, the implementation of the electrical system for Cal Poly’s 2021 Department of Energy Collegiate Wind Competition turbine is described. The mission of this project was to complete the turbine testing tasks to the best of the team’s ability. This system includes an off the shelf slotless permanent magnet synchronous generator and rectifier to produce a DC voltage. To maximize the power output at below-rated wind speeds, current sensors, voltage sensors, and a dynamic load with variable resistance were designed and tested. To curtail the power and rotor speed in high wind events, the turbine was equipped with …

Flywheel Fanny Pack Balance Assist, Ella Joy Mahood, Jason Scott Provol, Raymond Ming Tseng

Biomedical Engineering

The aim of this project is to develop a wearable device that will provide support to a balance impaired individual. The device will be predicated on the principle of gyroscopes. It will include a rapidly spinning flywheel, which will resist any changes to spatial orientation.

Sourceamerica Design Challenge Accessible Kitting And Packaging Station, Christopher Wijaya Tan, Keanau Rick Robin, Kyle Huawei Chuang, Ashley Humpal

Mechanical Engineering

This document entails our research, design, proposed development, and testing process for solving the 2020 SourceAmerica collegiate design challenge. Our team, “Just Kitting”, is composed of four Mechanical Engineering students from California Polytechnic San Luis Obispo. The design challenge requires us to create a device that will help improve the quality of life and productivity of people with disabilities working in the kitting and packaging industry. This document includes our background research and information received from various interviews with our sponsor and others who have experience working with disabilities. Using this information, we refined our problem statement to focus on …

Scitechatorium, Esther Hurst, Emma Salam, Nejad Harara, Felipe Dejesus

Mechanical Engineering

The Bellevue-Santa Fe Charter School SciTechatorium needs a new educational exhibit for its K-6th grade students. The exhibit must be safe, engaging, and exciting for the students to use, and will ideally introduce students to the topics of Science, Mathematics, Engineering, Art, and Technology (STEAM) concepts. The team has investigated some of the most popular science museums from around the nation, as well as several popular children’s educational toys. This research revealed a need for hands on, focused exhibits to provide an effective educational experience. Many of our favorite existing exhibits give students an opportunity to fail in a safe …

An Inclusive Design Approach To Integrating An External Human Machine Interface With Autonomous Vehicles, Sandra Roksic

Master's Theses

As autonomous vehicles become more prevalent in urban traffic settings, the safety of vulnerable road users, predominantly pedestrians, must be placed in high regard relative to the design of the autonomous vehicle's (AV's) external human machine interface (HMI). Traditionally, there exist communication methods between drivers and pedestrians, such as hand gestures, eye contact, and verbal cues that convey the driver's awareness of the pedestrian's presence. However, with autonomous vehicles, there is a shift in communicative responsibility from the driver to the vehicle itself. It is the vehicle's responsibility to intuitively and clearly indicate its actions to the pedestrian.

This research …

Aged 539 Graduate Internship Report - Delano High School, Ernesto H. Marcial

Agricultural Education: Graduate Internship Reports

This internship and project report includes validation documents required in meeting the quality criteria for secondary-level programs of instruction in agriculture. The supporting material includes information to receive state and local funding, outline the goals and objectives of the program, along with an overview of Delano High School, the agriculture program, and the community.

The Nolan House, Keiko-Ann K. Sanders, Gilbert C. Munoz, Michael A. Bahr, Titas Kalvalnis

Architectural Engineering

As a precedent, The Green Team analyzed the history of glass architecture, literature, and culture. Based on our research, we found that glass is often depicted as breakable, delicate, and a way to expose or display aspects that would otherwise be hidden. We challenged ourselves to incorporate safety and privacy into our glass house as a way to combat the pre-existing notions of glass in architecture.

Earthquake Engineering Research Institute 2021 Undergraduate Seismic Design Competition, Tomlinn Cox

Architectural Engineering

Since 2004, the Earthquake Engineering Research Institute (EERI) has hosted the undergraduate Seismic Design Competition to promote the study of earthquake engineering. This year, a team of students from the California Polytechnic State University, San Luis Obispo competed against 36 other colleges and universities from across the world in the 19^th annual competition, virtual for the first time due to the COVID-19 pandemic. This report summarizes and expands on the material prepared by the 2021 team to guide the exploration of the implementation of an addition to an existing hospital that needs retrofitting. This includes the potential design sequence …

Journeyman International: Dwell Being Jonestown, Mississippi, Autumn Wagner

Architectural Engineering

Journeyman International is a non-profit organization that works with countries all over the world to support humanitarian projects by pairing clients with design professionals and volunteers to oversee the design and construction of projects. This specific project partners with Third Lens Ministries and But God Ministries, two organizations that are hoping to empower the community in Jonestown, Mississippi. Dwell Being promotes sustainability and affordable housing in a new housing community in Jonestown that is designed for healthy living and community interaction. Jonestown is a very small 0.4 square acre town that has roots in systemic racism and oppression. A once …

Handheld Transvaginal Probe For Pap Smear Exams, Kim Knollenberg, Taeah Truong

Biomedical Engineering

This project aims to discard the use of the speculum in pap smear exams. A pap smear is a procedure that tests for cervical cancer in individuals assigned female at birth (AFAB) by screening cells collected from the cervix. Speculums are utilized in these examinations, as well as other gynecologic examinations and procedures. Due to the stigma and racist and misogynistic history of the speculum, we moved to design a device that removes the need for specula in pap smear exams. This device will aim to decrease the cervical cancer mortality rate and reduce the stigma around pap smear exams.

Automatic Tourniquet For Military Emergencies, Arshia Nazerani Houshmand, Marina Felt, Blake Juett

Biomedical Engineering

This document contains the progress and development of an automated tourniquet that would be intended for use within the United States military. The project was student-led and sponsored. Coordination and confirmation of our device was provided by Dr. John F. Kragh, who is part of the U.S. Army Institute of Surgical Research. The document will outline the research conducted on tourniquets, specification development of the tourniquet, morphology process, and final design production of the automatic tourniquet.

Conspiratorial Thinking And Personality, Fiona R. Papile

Social Sciences

Why do some people believe in conspiracies more than others? Previous research suggests that variables such as education level, gender, race, or political preference are not useful in a predictive capacity, so what individual traits or characteristics make someone more likely to believe in conspiracy theories?

Locus of control is a psychological personality trait that indicates how an individual attributes the causes and outcomes of life events. Locus of control ranges from a more internally located locus, to more externally located. Internally located individuals believe that their own actions primarily impact the outcomes of events, whereas externally located individuals believe …

Mapping The Suitability Of Cal Poly's Insulated Solar Electric Cookers (Isec) In Ghana, Togo, And Jamaica, Julia G. Kraatz

Social Sciences

The World Health Organization estimates that 3 billion people depend on biomass fuels for cooking, heating, and other day-to-day activities, which causes approximately 4.3 million people annually to die from illnesses attributable to indoor air pollution. The issue is especially pressing for women and children in developing countries, because women care for the home and are consequently responsible for attaining household fuels and cooking. In 2015, ISECs (Insulated Solar Electric Cookers) were developed at California Polytechnic State University, San Luis Obispo, as a technology that utilizes solar electricity to directly cook food in a well-insulated chamber. They are capable of …

Securing Funding For The 40 Prado Medically Assisted Residential Treatment Center, Manees Kanukuntla

Social Sciences

For my senior project, I wrote a grant proposal on behalf of the Community Action Partnership of San Luis Obispo (CAPSLO). The proposal was to be submitted to the Miossi Charitable Trust, and funds secured would have been used to complete the construction of a medically assisted residential in-patient detox facility on CAPSLO’s 40 Prado campus. The detox facility, which is currently under construction, will provide treatment for individuals who struggle with substance abuse disorders, and will specifically provide treatment for those facing opioid addictions. Most importantly, the facility is specifically available for low-income and unhoused individuals of San Luis …

Emotional Intelligence Development Program For Designers, Chloe Heinz

Graphic Communication

What sets great designers apart from the rest is their ability to empathize with the user they’re designing for. Formal education doesn’t teach the soft skills that help a designer effectively communicate with the client and connect with the user. To bridge this educational gap, I designed a piece of interactive instructional media in the form of a customizable emotional intelligence development program to enhance designers’ self- awareness, emotional regulation, motivation, empathy, and social skills. This program is based upon the intentional change theory by Richard Boyatzis, so the program duration is left up to the program user to meet …

The Vibe Tr Series: Fit-Widget Bracelet, Angela Michelle Colabella, Molly Rodda, Emma Paige Neal, Joey Chen

General Engineering

As our society begins to understand the impact of mental health on human behavior, David Postula saw the need for a product that could help children increase their productivity in the classroom. David imagined the VIBE Bracelet, designed as an anti-anxiety tool that helps young children reduce stress in the classroom and intermittently reminds the user of goals or ideas throughout the day. David offered sponsorship for the development of the VIBE Bracelet design project by Cal Poly SLO students. The students designed the VIBE Bracelet to fit David’s requirements for a thoughtful reminder bracelet: a fidget element on the …

Care: Covid-19 Abatement Return To Education, Matteo Marsella, Emma Oneto, Janis Iourovitski

General Engineering

The COVID-19 pandemic poses new challenges in many aspects of life and society. Being that the prime ethical responsibility of engineers is to keep people safe, our sponsor, John Nielsen, asked us to develop a solution that addresses a current or anticipated need related to the ongoing COVID- 19 pandemic. We entered a needs-finding phase to search for problems caused by COVID-19 that people want or need to be solved. We identified K-12 education as an area that has undergone drastic changes due to the pandemic. After conducting interviews with educators, we found that K-12 teachers need a way to …

San Joaquin Parks And Recreation Site-Specific Strategic Plan, Ida Araghieyan, Jessica M. Gastineau Romero

City and Regional Planning

The San Joaquin Parks and Recreation Strategic Plan (SJPRSP) outlines a road to success for parks, open space, and recreational amenities. Areas of improvement are identified, and local assessments of opportunities and strengths of San Joaquin are examined to curate a site-specific plan of what could be implemented regarding local parks and recreation and open space.

Health Infrastructure Accessibility In San Joaquin, Ca, Vinson Lok Kwan, Trisha Phuong Tran

City and Regional Planning

The purpose of this study is to assess the health infrastructure and accessibility in San Joaquin, California through the existing conditions of the city, reviewing various cities facing similar conditions, and creating potential solutions or recommendations to be implemented into the city to accommodate growth and overall well-being in the community.

Health infrastructure and accessibility is important to every community since it has the ability to influence the quality-of-care individuals are able to receive. When it comes to infrastructure, it is important to determine the underlying health conditions the local population faces and whether the services provided are adequate in …

How To Save A Planet: Communicating Climate Change Efficacy Through Narrative, Amanda Kaye Smith

Communication Studies

The podcast How to Save a Planet represents an emerging form of climate change communication that can be further explored through rhetorical analysis. For people who are interested in climate change but want less doom-and-gloom messaging and more applicable ways to address it, How to Save a Planet presents the unique opportunity to listen in on the discussions of science communicators and climate experts as they detangle the complexity that is climate change. By utilizing the podcast form, hosts Alex Blumberg and Dr. Ayana Elizabeth Johnson can reach a large audience of listeners to bridge the gap between the scientists …

Dental Cement Thickening Agents For Mudslide Prevention, Kristina Emiliya Babayev, Emily Elizabeth Johnson, Diana Evet Reihaneh

Materials Engineering

The purpose of this project is to develop a non-toxic mud thickening agent for the application of decreasing mudslide intensity where performance is measured by flow rate, viscosity, and toxicity tests. We hypothesized that dental cements could be a potential candidate due to their adhesive, hydrophilic, and biocompatible properties. Zinc phosphate, glass ionomer, and polycarboxylate cement were among the dental cements tested. These tests were performed at low and high concentrations of 25 grams and 125 grams, respectively, mixed into soil to produce 3500 gram samples. The dental cements produced noticeable thickening effects in the mud, as the average viscosity …

Objective Design Standards For The City Of San Luis Obispo, Wilfrido Amaya, Ian Madrigal

City and Regional Planning

The state of California has been facing a housing crisis for several decades (Buhayar & Cannon, 2019). The state, along with other municipalities have been enacting laws to help mitigate the issue such as SB 35 (2017) and AB 2162 (2018). In recent years, cities and other municipalities have been using different methods of integrating missing middle housing into their planning practices. Missing middle housing is defined as being the “range of house-scale buildings with multiple units - compatible in scale and form with detached single-family homes” (missingmiddlehousing.com). There are different methods of implementing missing middle housing, however, in the …

San Joaquin Air Quality And Active Transportation Specific Plan, Samuel Robert Kuennen, William David Jarrett

City and Regional Planning

The focus of this project is to improve the overall air quality in San Joaquin. It will specifically focus on the PM2.5 pollutant, as this pollutant has the highest potential for change. Additionally, the PM2.5 pollutant poses major health risks to the community when there are high levels of it. The primary contributors of PM2.5 are automobiles, geography, and weather. This project will discuss methods that can reduce the reliance on single occupancy vehicles. These methods include the development of pedestrian and bicycle infrastructure as well as the improvement of the area’s regional transport services.

Development Of A Marine Biodegradable Target Balloon, Blake Samuel Robinson, Arash Sam Akhavi, David Leonardo Albarran-Martinez

Materials Engineering

The US Navy utilizes PVC target balloons, known as Killer Tomatoes, that are inflated onboard a naval vessel then deployed into the ocean to calibrate a variety of weaponry. The Navy has requested the investigation of biodegradable polymers to replace the PVC in attempts to reduce ocean waste that is generated from the leftover PVC material. After communicating with American Pacific Plastic Fabricators (APPF), the current manufacturer of the Killer Tomatoes, we gained an understanding of the manufacturing process and the material requirements that would allow a new material to be integrated into their current process. Two proprietary, trial polymers …

Designing A Replication Study In Kinesiology: Lessons From The Field, Ruben A. Montoya Vega, Regina F. Hockert, Emma L. Cutner, Jafra D. Thomas

Kinesiology and Public Health

The submitted presentation material summarizes a project presented at the 2021 Cal Poly Virtual BEACoN Symposium. The title of the project which the presentation is based is, “Towards Equitable Communication: Explorations to Guide Knowledge Translation in Kinesiology.” The uploaded file document presents the presentation abstract, student testimony, as well as suggested citations for individual aspects of the presentation material. Please follow the social media profiles of the faculty mentor to the project, Dr. Thomas, for timely project updates. You may find related work from this lab group published to Cal Poly Digital Commons under the Kinesiology and Public Health section …

Training Novices To Evaluate The Quality Of Physical Activity Promotion Material: Results Of A Pilot Study, Ethan N. Tse, Savannah A. Longoria, Cameron N. Christopher, Jafra D. Thomas

Kinesiology and Public Health

The credibility and usability of lay physical activity promotion material are a persistent problem (Thomas & Cardinal, 2020, TJACM). These quality issues deter the material in promoting health literacy, a major predictor of prevention-oriented health behaviors (e.g., regular exercise, U.S. National Action Plan to Improve Health Literacy). Few studies, however, have evaluated the quality of lay material over time (Thomas et al., 2018, Quest). PURPOSE: In order to conduct a repeated-measures study of the quality of physical activity promotion web articles for lay adults, one experienced researcher (JDT) trained undergraduates on how to use the Suitability …