Digital Commons Network^™

On The Mobility Of Small Aperture Telescopes For Initial Orbit Determination And Apparent Magnitude Derivation Of Low Earth Satellites, Jonathan Ian Hernandez

Master's Theses

Maintaining Space Domain Awareness (SDA) of satellites in low Earth orbit (LEO) requires effective methods of tracking and characterization. Optical measurements of these objects are generally sparse due to limited access intervals and high angular rates. Light pollution and geographic obstructions may also preclude consistent observations. However, a mobile small aperture telescope grants the ability to minimize such environmental effects, thereby increasing capture likelihoods for objects within this regime. By enhancing LEO satellite visibility in this way, extensive orbital and visual data are obtainable.

An 8-inch Meade LX200GPS telescope equipped with a Lumenera SKYnyx2-0M CCD camera comprises the system that …

Wi-Fi Sensing: Device-Free In-Zone Object Movement Detection, Nicholas P. Schnorr

Master's Theses

Wi-Fi Sensing is becoming a prominent field with a wide range of potential applications. Using existing hardware on a wireless network such as access points, cell phones, and smart home devices, important information can be inferred about the current physical environment. Through the analysis of Channel State Information collected in the Neighborhood Discovery Protocol process, the wireless network can detect disturbances in Wi-Fi signals when the physical environment changes. This results in a system that can sense motion within the Wi-Fi network, allowing for movement detection without any wearable devices.

The goal of this thesis is to answer whether Wi-Fi …

Assessing The Effects Of Oxaliplatin On An In Vitro Three-Dimensional Human Colorectal Cancer Model, Sabrina Nelson

Master's Theses

Colorectal cancer is the third most common cancer in the United States with a 5-year late-stage survival rate of only 14%. Due to the lack of translation between animal models and clinical trials as well as the inefficacy of many chemotherapeutics in initial clinical trials, researchers are turning to in vitro drug screening models in an effort to mimic the conditions in vivo. This research project aimed to validate an in vitro tumor culture model within a microfluidic device using a clinically relevant chemotherapy drug. The first experiment consisted of a cell density and drug concentration study to determine …

Indoor Positioning Using Synchronized Ultrasonic Ofdma Signals, Julian Bartolone

Master's Theses

This paper proposes a method of short-range indoor localization using differential phase measurements of synchronized two-tone ultrasonic signals in an Orthogonal Frequency Multiple Access (OFDMA) scheme. This indoor positioning system (IPS) operates at an ultrasonic frequency of approximately 40kHz and synchronizes using an infrared signal. The OFDMA scheme allows for a receiver to process the signals from multiple transmitters continuously without the signals interfering with each other. The phases of the signals are measured using Goertzel Filters, allowing for low-complexity frequency content analysis. A MATLAB simulation using the proposed localization method is performed using four transmitter nodes in the corners …

Performance Loss Rate And Temperature Modeling In Predictive Energy Yield Programs For Utility-Scale Solar Power Plants, Katelynn M. Dinius

Master's Theses

The Gold Tree Solar Farm, designed by REC Solar, has a rated output power of 4.5 MW and began operation in 2018 to provide electricity to Cal Poly’s campus. Gold Tree Solar Farm site terrain consists of rolling hills and uneven slopes. The uneven typography results in interrow shading, requiring a modified tracking control algorithm to maximize power production. Predicting a utility solar field’s lifetime energy yield is a critical step in assessing project feasibility and calculating project revenue. The MATLAB-based predictive power model developed for this field overpredicted power in the middle of the day. The purpose of this …

Paso Robles Police Department Shooting Range Electrical Installation, Shelby I. Prosch

Construction Management

The Paso Police Department has a shooting range for police officers to practice and master using firearms. A shooting range is a crucial part of police officer training to ensure public safety and correct and accurate usage of safety weapons. The construction for the shooting range began in the spring of 2021 by Cal Poly students where they laid the foundation. I became involved to further the progress of the shooting range by installing an electrical system. For that phase to begin, I completed a pre-construction package that details the materials and steps for installation. The package includes a scope …

The Benefits Of Utilizing Qr Codes On Construction Jobsites To Conduct Punch, Jack Richard Stryker

Construction Management

The punch process of construction is an important task that a construction project team is faced with before a project reaches final completion. A punch list documents and tracks items that need to be corrected, repaired, or are incomplete. If not closely managed, open punch items can drag out the completion of a project, and is often seen as a tedious task for project engineers. The industry has not seen much change as to how this process is conducted until recent advancements in construction software. This paper will take a deeper look into the benefits seen from utilizing Procore’s location-based …

Bathroom Remodel For Son Care Foundation, Inc., Tae Hun Kwak

Construction Management

The purpose of this paper is to provide insight into the process of remodeling a 42 SF bathroom for Son Care Foundation, Inc. The initial scope included the removal of an existing fiberglass bathtub, plumbing work, drywall installation, mudding, drywall texturing, new flooring, a new toilet, and a new sink. During construction, the owner requested that I add paint, an ADA-compliant sink, a new lighting fixture, a new vinyl baseboard, a new mirror, a new cabinet, new door trim, and new door hardware as part of my scope. I used what I learned in class to solve problems during the …

Analyzing The Gender Gap In Field Positions On Commercial Construction Projects, Adriana L. Frazier

Construction Management

The percentage of women working in the construction industry is on the rise. However, most women working in the construction industry often fill administrative roles, office positions, and project management roles rather than field positions such as tradeswomen, foremen, or superintendents. According to the United States Bureau of Labor Statistics, as of 2020, women constitute 10.9 percent of the entire construction industry. Specifically, 86.7 percent of those women are in office positions with only 3.5 percent of women in trade positions. Those numbers signify that the construction industry is not benefitting from women in field positions. That is due to …

Protecting The Caed Shop Equipment Yard, Chloe K. Stevens

Construction Management

Anytime a construction project is considered, there is a lengthy process that happens before breaking ground. It is important to consider the environment around the project, the intended purpose and use of the space, and the materials, time, and budget needed to develop it. If you do not take these things into consideration correctly, it will negatively impact the functionality and the efficiency of both the use and the construction process. This project consists of creating a pre-construction plan for building out a weather protective and space efficient enclosure at the College of Architectural and Environmental Design Shop Yard. The …

Summer Construction Bootcamp Building Activities, Ashley Leeann Isla

Construction Management

This paper outlines the trade-specific building activities that will take place at Cal Poly’s Summer Construction Bootcamp in Summer, 2022. The four construction trades that will be highlighted at the camp are concrete, carpentry, sheet metal, and plumbing. During each day, campers will build a small project that aligns with each highlighted construction trade. During the concrete day, campers will create stepping stones and perform a cylinder break test; during carpentry, campers will compete in a wall framing exercise; for sheet metal, campers will construct sheet metal roses; and for plumbing, they will make copper pipe “CPs.” This paper describes …

Campus Improvement Cm460 Manual To Improve Project Based Success, John C. Palmer

Construction Management

This Senior project research will critically assess the process for campus improvement on the Cal Poly Campus. The purpose of this research is providing a final deliverable that is a usable document for future students with the intention of creating a campus improvement project. The project includes the necessary resources such as campus facility contacts, permitting process explanation, the documentation process for preconstruction, funding opportunities and the expected delays to create a realistic plan. The document is created as a manual for Construction Management undergraduates in hopes of encouraging future students to create a project-based campus-improvement plan that is more …

Development Of A Conceptual Design, Estimate, & Schedule For Cal Poly Track & Field Hurdle Shed, Jonathan Chagnon

Construction Management

This paper details the processes completed to produce the conceptual design, estimate, and schedule for a track and field hurdle shed at the Cal Poly Track facility. The main objective for this project was to create a conceptual idea for the track team that would make use of the current open space at the facility and create more storage space for current and future equipment obtained by the program. By completing this project, the track team would be able to receive a design that would allow them to push the concept forward as possible, an estimate that would give the …

Hα Reverberation Mapping Of The Intermediate-Mass Active Galactic Nucleus In Ngc 4395, Hojin Cho, Jong-Hak Woo, Tommaso Treu, Peter R. Williams, Stephen F. Armen, Aaron J. Barth, Vardha N. Bennert, Wanjin Cho, Alexei V. Filippenko, Elena Gallo, Jaehyuk Geum, Diego González-Buitrago, Kayhan Gültekin, Edmund Hodges-Kluck, John C. Horst, Seong Hyeon Hwang, Wonseok Kang, Minjin Kim, Taewoo Kim, Douglas C. Leonard, Matthew A. Malkan, Raymond P. Remigio, David J. Sand, Jaejin Shin, Donghoon Son, Hyun-Il Sung, Vivian U

Physics

We present the results of a high-cadence spectroscopic and imaging monitoring campaign of the active galactic nucleus (AGN) of NGC 4395. High signal-to-noise-ratio spectra were obtained at the Gemini-N 8 m telescope using the GMOS integral field spectrograph (IFS) on 2019 March 7 and at the Keck I 10 m telescope using the Low-Resolution Imaging Spectrometer with slit masks on 2019 March 3 and April 2. Photometric data were obtained with a number of 1 m-class telescopes during the same nights. The narrow-line region (NLR) is spatially resolved; therefore, its variable contributions to the slit spectra make the standard procedure …

Fuel Inventory Report For Montana De Oro State Park, Spencer Gordon

Master of Science in Environmental Sciences and Management Projects

Within the last century anthropogenic effects have shifted fire resilient habitats that are adapted to thousands of years of frequent low intensity fires to landscapes that are susceptible to extreme fire behavior which threaten human assets and sensitive natural resources. Entities that manage forests will need to prioritize fuel reduction as a management tool to promote forest health and mitigate hazardous fire conditions. A fuel inventory of a eucalyptus forest at Montana De Oro State Park in Los Osos, CA was collected using a combination of Brown’s 1973 and Brown’s 1982 methods. The fuel inventory revealed the eucalyptus forest yielded …

The Effects Of Recreational Cannabis Access On Labor Markets: Evidence From Colorado, Avinandan Chakraborty, Jacqueline Doremus, Sarah Stith

Economics

Recreational cannabis markets possibly increase labor demand through investments in facilities for growing, processing, and retail sales of cannabis, as well as through other industries such as manufacturing, leisure, and hospitality. However, this increase in labor demand may vary substantially across counties within a state as most states with legal recreational canna-bis allow individual counties to ban commercial cannabis sales. Meanwhile, labor supply may change through positive and negative effects from cannabis use. Using county-level Colorado data from 2011 to 2018 and exploiting variation across counties in the existence and timing of the start of dispensary sales, we test for …

Animal Morality: Control Without Reflective Self-Awareness, Sabina M. Schrynemakers

Between the Species

Non-human animals can act morally by acting on the basis of moral emotions such as concern without being morally responsible in the sense of deserving praise or blame. They can unconsciously select from different motivations and so have the requisite control over their behavior for moral normativity yet lack awareness of their reasons as reasons and so lack the self-reflection and understanding required for full moral responsibility. This is an alternative to Mark Rowlands’ compatibilist construal of non-human animals as moral subjects.

Seismic Design Of Rigid Wall-Flexible Diaphragm Buildings, John W. Lawson, Dominic J. Kelly, Andre Filiatrault, Maria Koliou

Architectural Engineering

No abstract provided.

Considerations Of Diversity, Equity, And Inclusion In Advanced Structural Engineering Courses, Claire Leader, Faith Sharp, Anahid Behrouzi

Architectural Engineering

This paper presents various techniques investigated by the authors to bring discussion of societal impact into two advanced structural engineering courses taught at Cal Poly – San Luis Obispo within the Architectural Engineering (ARCE) department during the 2020-21 academic year. The first was an undergraduate reinforced concrete design lecture/lab class where the instructor was able to convey the stories of the individuals and events that influence the ACI 318 code and ASTM standards used for concrete design. The second was a graduate nonlinear structural behavior lecture class that involves a weekly seminar by guest speakers who presented case studies with …

Wic Participants' Perceptions Of Covid-19-Related Changes To Wic Recertification And Service Delivery, Alison K. Ventura, Catherine E. Martinez, Shannon E. Whaley

Kinesiology and Public Health

Many Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) clinics implemented alternatives to in-person service delivery in response to the COVID-19 pandemic, including virtual visits and electronic document sharing. The objective of this cross-sectional study was to describe WIC participants’ experiences with remote service delivery and recertification during the pandemic. Participants included mothers and infants who participated in a WIC-based intervention between June 2019-August 2020. All participants (N = 246) were invited to complete a follow-up survey between November 2020-February 2021; 185 mothers completed the survey. The survey assessed sociodemographics, employment, food security, experiences with remote WIC recertification …

Academic Senate Retreat - Agenda, 9/17/2021, Academic Senate

Academic Senate Agendas

No abstract provided.

The Role Of Digital Transformation And Specification Data Management In Streamlining Supply Chains, Daniel Klemm

Master's Theses

The packaging and product supply chain is currently undergoing a digital transformation that changes the way organizations manage data. Cloud-based software is an emerging technological innovation entirely focused on harnessing the power of packaging/product specifications to create efficiencies. These applications coordinate the data that millions of SKUs worldwide are generating into a harmonized system that will not only organize the SKUs but also create valuable information that will allow stakeholders to make decisions based upon data-driven insights.

Specifications are the DNA-level information of packaging and products. Items such as the bill of materials, technical drawings, and inventory are stored together …

Fire Protection System Analysis Of Air National Guard Readiness Center, Steven A. Waidelich

Fire Protection Engineering: Culminating Experience Project Reports

This report analyzes the impact of a fire located in the atrium at the Air National Guard Readiness Center (ANGRC) located at Joint Base Andrews, Maryland. The fifth floor is an enclosed penthouse used to enclose mechanical and electrical equipment. International Building Code (IBC) 2006 and 2005, section 506.1, excludes elevator penthouses of this type from the height and area calculations. The four occupied floors are used for office areas with the three- story atrium opening onto the balcony of the second- and the third-floor office area, and the second-floor conference center.

The prescriptive portion of this analysis looked at …

Extinction Coefficient Measurement Comparison Of Tungsten Powder Clouds, Spencer P. Grenley

Master's Theses

All materials in dust form pose an increased risk of accidental deflagration, or explosion. For workplace safety, this risk of deflagration for a solid particulate sample is characterized through specialized dust explosibility testing systems. These systems disperse a cloud of powder inside a spherical chamber via a pressure gradient, where a timed ignition occurs. The accuracy of measurements taken during this process are predicated upon the assumption that the cloud of powder is uniformly distributed during the ignition period. Metal additive manufacturing (AM) is a rapidly expanding technology that, in some cases, involves heavy metal powders that do not disperse …

Optimization Of Interplanetary Transfer Trajectories Using The Invariant Manifolds Of Halo Orbits, Ryan Yedinak

Master's Theses

Traditionally, two-body dynamics have been used to design orbital trajectories for interplanetary missions using a series of Lambert’s transfers and gravity assists. Although these are reliable methods, they have extremely high fuel requirements, especially for missions to outer planets. From an orbital mechanics perspective, three ways of reducing fuel requirements for these types of missions are utilizing low energy transfer trajectories, applying low thrust engine parameters, and implementing orbit optimization techniques.

The goal of this thesis is to combine low energy transfers created from the dynamics of the Circular Restricted Three-Body Problem (CRTBP) with low-thrust orbit optimization techniques to develop …

Nopal En La Frente: Racial Passing And The Hidden Indigeneity Of The Los Altos Region Of Jalisco, 1720-1950, Brandon Manuel Márquez

History

When people look at Los Altos de Jalisco, they typically think of this area as representing a pocket of European ancestry in a mestizaje state. Yet this ignores one huge aspect of this region: its indigenous history. Throughout the last three hundred years, the Los Altos region of Jalisco has allowed for the racial passing of many different families. This is all the more significant because many of its citizens have what many believe to be European features- mainly being light hair, light skin, and colored eyes. Because of these perceived European features, many of the Alteños believe that they …

Assessing The Water Quality Of Three Bar-Built Estuaries In The Central Coast Of California, Micaelina Sarmiento Martinez

Master of Science in Environmental Sciences and Management Projects

Estuaries are coastal confluences with innumerable ecosystem services. With the continuous change in land use including the increasing number of people moving to live in coastal areas and on-going agricultural operations, these coastal systems are being adversely impacted. Climate change is also negatively affecting estuaries. Subsequently, this research study assessed the water quality, monthly, at three different locations of three bar-built estuaries in the Central Coast of California. Water quality was evaluated by the change in chlorophyll-a, nitrogen, phosphorus, pH, temperature, dissolved oxygen, and specific conductivity over the course of 19 months. The eutrophication potential and the role of open …

Equilibrium Without Statics: The Modern Muller Breslau Method, Claire Tyler Ballard

Architectural Engineering

This senior project report discusses the applications of the Modern Muller-Breslau Method. To complete this project, the student learned this method and created unique example problems. The report explores these unique example problems with explanations of the processes to solve each problem. The examples shown consist of determinant beams, frames, trusses, and 3-hinged arches. In addition, a more complex structural analysis topic, plastic analysis, will be explained. Lastly, the report concludes with an insight into a student’s experience with the method.

A Study Of Non-Computing Majors' Growth Mindset, Self-Efficacy And Perceived Cs Relevance In Cs1, Jae Hyuk Yoo

Master's Theses

As the demand for programming skills in today’s job market is rapidly increasing for disciplines outside of computing, CS courses have experienced spikes in enrollment for non-majors. Students in disciplines including art, design and biological sciences are now often required to take introductory CS courses. Previous research has shown the role of growth mindset, self-efficacy and relevance in student success within CS but such metrics are largely unknown for non-majors. In this thesis, we surveyed non-majors in CS1 at Cal Poly, San Luis Obispo during the early and late weeks of the quarter to gain insights on their growth mindset, …

Subnational Map Of Poverty Generated From Remote-Sensing Data In Africa: Using Machine Learning Models And Advanced Regression Methods For Poverty Estimation, Lionel N. Hanke

Master's Theses

According to the 2020 poverty estimates from the World Bank, it is estimated that 9.1% - 9.4% of the global population lived on less than $1.90 per day. It is estimated that the Covid-19 pandemic further aggravated the issue by pushing more than 1% of the global population below the international poverty line of $1.90 per day (WorldBank, 2020). To provide help and formulate effective measures, poverty needs to be located as exact as possible. For this purpose, it was investigated whether regression methods with aggregated remote-sensing data could be used to estimate poverty in Africa. Therefore, five distinct regression …