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California Polytechnic State University, San Luis Obispo

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Full-Text Articles in Engineering

Dependencyvis: Helping Developers Visualize Software Dependency Information, Nathan Lui Jun 2021

Dependencyvis: Helping Developers Visualize Software Dependency Information, Nathan Lui

Master's Theses

The use of dependencies have been increasing in popularity over the past decade, especially as package managers such as JavaScript's npm has made getting these packages a simple command to run. However, while incidents such as the left-pad incident has increased awareness of how vulnerable relying on these packages are, there is still some work to be done when it comes to getting developers to take the extra research step to determine if a package is up to standards. Finding metrics of different packages and comparing them is always a difficult and time consuming task, especially since potential vulnerabilities ...


Cm Member Of Slocoe Peace Conference Center Feasibility Study, Jackson Reynolds May 2021

Cm Member Of Slocoe Peace Conference Center Feasibility Study, Jackson Reynolds

Construction Management

This paper describes the parking design and estimate portion of a whole feasibility study conducted by an interdisciplinary team. The interdisciplinary team consisted of three senior undergraduate industrial engineering students, and one senior undergraduate construction management student. This feasibility study was conducted for the San Luis Obispo County Office of Education (SLOCOE) to determine if it is feasible to construct a new, 400-person conference center on a site in San Luis Obispo, CA. The complete study includes analyses of the following topics: economic, utilities, traffic/road, approval from Chumash Tribe, social/historical, climate, geological, vegetation and wildlife, noise and pollution ...


Electro-Muscle-To-Muscle Transfer, Hailey Quinn Casino, Jake Keola Javier, Samuel Joseph Borda, Charlotte Amalie Anderson Mar 2021

Electro-Muscle-To-Muscle Transfer, Hailey Quinn Casino, Jake Keola Javier, Samuel Joseph Borda, Charlotte Amalie Anderson

Biomedical Engineering

The Electro Muscle to Muscle Transfer (EMMT) system will entail designing, manufacturing, and providing a wearable device that stimulates paralyzed muscles in the hand by sampling and amplifying muscles from the forearm. With further development, the system may be capable of using different muscle inputs other than the forearm muscles along with different stimulated muscle outputs other than the hand. The system functions as a rehabilitative device for spinal cord injuries, irreparable nerve loss and/or damage, and improper neuromuscular function. It is not for total treatment nor for curing of the disabilities listed above but to alleviate the side ...


Hypoxic Incubation Chamber, Makenzie Jones, Andrea Skattenborg, Henry Elsner Mar 2021

Hypoxic Incubation Chamber, Makenzie Jones, Andrea Skattenborg, Henry Elsner

Biomedical Engineering

In developing a model to test anti-tumor drugs, Dr. Christopher Heylman’s lab requires the ability to culture cells in a hypoxic environment. The purpose of this project was to make this possible. Funding for this project comes from the Biomedical Engineering Department, the Hannah-Forbes Fund, and Dr. Heylman’s lab. The chamber must be able to reach a user-defined oxygen concentration and hold that concentration for 48 hours while creating an environment conducive to cell culture. Importantly, the chamber must also be sterilizable and cleanable for repeated use. While several products exist to create hypoxic environments for cell culture ...


Enduro Campers, Ryan J. Shomsky, Alexander W. Horst, Kevin S. Pickering, Jackson L. Aplanalp, Luke Arana, Will Firestone Mar 2021

Enduro Campers, Ryan J. Shomsky, Alexander W. Horst, Kevin S. Pickering, Jackson L. Aplanalp, Luke Arana, Will Firestone

Mechanical Engineering

The Enduro Campers senior project team (Formerly known as Lobo Campers senior project team) was recruited by Mr. Leif Stein to assist in the design, manufacturing, and testing of the materials and components of his company’s expedition box camper. The two main focuses of the project, divided into two sub-teams, were on the testing and manufacturing process of the materials used in the camper, and on the design and analysis of the camper’s access door, step box, and other subsystems.

The focus of the materials analysis and manufacturing team was based around the design parameter to use composite ...


Wood Post And Non-Climb Fencing Construction For Hoofstock Pasture, Jessica Miller Mar 2021

Wood Post And Non-Climb Fencing Construction For Hoofstock Pasture, Jessica Miller

Construction Management

This paper covers the planning, site clearing and construction of a new 7,100 square foot hoofstock pasture for the nonprofit group Conservation Ambassadors at their Northern campus in Weimar, California. The project involved planning the layout of the new pasture based on the owner’s preferences for pasture size, material type and location as well as removing several old pre-existing posts to prepare for the new fence to be built. New two-foot deep post holes were dug and the four-inch diameter, eight-foot long wood posts were leveled and set in concrete. Horizontal H-braces and cross brace tension wire were ...


Smud Solar Regatta, Logan Garby, Nam Le, Jacob Singer, Alejandro Carrera, Laura Casas Mar 2021

Smud Solar Regatta, Logan Garby, Nam Le, Jacob Singer, Alejandro Carrera, Laura Casas

Mechanical Engineering

The Sacramento Municipal Utility District (SMUD) hosts the Solar Regatta every year in Rancho Seco, CA, a competition which consists of teams building a solar powered boat to compete in three races: the sprint race, endurance race, and slalom race. The Cal Poly Solar Regatta team was informed mid-project by SMUD that the competition has been canceled once again for spring 2021, but the team decided to move forward with the construction of the boat. The previous Cal Poly team from 2019/2020 designed the hull and propulsion system of the boat. The 2020/2021 team worked with the previous ...


The Effects Of Covid-19 On A Commercial Construction Company: A Case Study, Dylan Reynolds Mar 2021

The Effects Of Covid-19 On A Commercial Construction Company: A Case Study, Dylan Reynolds

Construction Management

The COVID-19 pandemic of 2020 and 2021 resulted in many states issuing stay-at-home orders and closing businesses. In some states, construction was deemed essential and allowed to remain open. Dempsey Construction, Inc. is a Southern California commercial construction company that was permitted to continue operation with the exception of a brief lockdown in March and April of 2020. Despite being permitted to remain open, the company had to face many direct and indirect challenges resulting from the worldwide pandemic. In addition to schedule adjustments, daily cleaning on jobsites and in the office, and increased material prices and lead times, Dempsey ...


Best Practices For Bridge Crane Implementation And Installation: A Case Study, Sterling D. Treloar Mar 2021

Best Practices For Bridge Crane Implementation And Installation: A Case Study, Sterling D. Treloar

Construction Management

Overhead Cranes, which are more commonly referred to as bridge cranes, provide a substantial amount of flexibility with respect to the user’s ability to move material and heavy equipment throughout a factory or manufacturing facility. Oftentimes, the client is not aware of the benefits of implementing bridge cranes rather than using mobile gantry cranes. The client may not be aware of the benefits of bridge crane installation occurring at the beginning of a project or in fact, including it in the initial design of the project, rather than considering it in the middle of the project. This case study ...


Los Angeles Homeless Epidemic - An Analysis Of Proposition Hhh, Howard T. Duong Mar 2021

Los Angeles Homeless Epidemic - An Analysis Of Proposition Hhh, Howard T. Duong

Construction Management

Passed in 2016, Proposition HHH is a $1.2 billion bill hoping to curb the homelessness epidemic that is rising in the city of Los Angeles with the newly added construction of 10,000 supportive housing units. This study serves to analyze and detail the homelessness epidemic in the Los Angeles Area, familiarizes the reader with how Proposition HHH funding works together with developers, as well as some of its shortcomings to date so far. To garner additional research, a survey was performed with a sample size from both the developers engaged with Proposition HHH and residents of the product ...


Risk Management In Response To Covid-19: Comparative Case Study, Justin Hong Mar 2021

Risk Management In Response To Covid-19: Comparative Case Study, Justin Hong

Construction Management

The COVID-19 pandemic has affected many aspects of the construction industry. Construction industry members such as owners, developers, subcontractors have experienced varying degrees of impacts because of COVID-19. It is important for companies to adopt risk management strategies to mitigate risk and reduce potential injuries. Due to new rules and regulations mandated by the government, companies had to change the way they operate. This comparative case study focuses on how the pandemic has affected large and small residential companies and compare the risk management strategies set in place by different companies. It was determined that most residential companies were not ...


Subcontractor Claim Management And Dispute Resolution Methods In The State Of California Versus The Province Of British Columbia: A Case Study, Harrison A D Grant Mar 2021

Subcontractor Claim Management And Dispute Resolution Methods In The State Of California Versus The Province Of British Columbia: A Case Study, Harrison A D Grant

Construction Management

In the construction industry, discordance between what is expected versus what is delivered often arises. This disparity is commonly handled using informal negotiation. However, if negotiations fail, then claims and disputes often emerge. Issues involving scope of work, change orders, schedule, and payment can lead to conflicts. Companies try to employ the best alternative dispute resolution method to settle subcontractor claims and disputes without the need for litigation. Speaking with construction professionals in California and British Columbia, a difference in opinion exists as to which method is considered most effective when dealing with subcontractor claims and disputes. In California, the ...


Net-Zero Homes, The Homes Of The Future, Primo Guseppi Facchini Mar 2021

Net-Zero Homes, The Homes Of The Future, Primo Guseppi Facchini

Construction Management

Net-Zero homes are the homes of the future (Holmes, 2018). What makes Net-zero homes unique is they rely on solar power, opposed to all standard housing that relies on the power grid. These homes use solar instead of other forms of energy generating technology because it is more affordable and better for the environment. California has blazed the trail for the rest of the United States and the world to follow with their Net-Zero housing proposition. Starting January 2020 California will require all residential buildings to be net-zero homes. Net-Zero homes are important because it is no secret that our ...


Bilingual Training Course For Redwood Residential Fence Company, Adriana Bernabe Martinez Mar 2021

Bilingual Training Course For Redwood Residential Fence Company, Adriana Bernabe Martinez

Construction Management

The Hispanic population has been increasing in the US over the past twenty years, and made up 42.9% of the construction workforce in 2018 (Data USA, n.d.). Because of this population increase, it’s expected that 1 in 4 persons will be of Hispanic descent by the year 2050 (Canales, 2009). Due to this increase, many language barriers exist that can create serious issues in construction. Language barriers cause productivity to decrease and increase concerns for the workers’ safety. Although OSHA trainings are available in Spanish, the opportunity to take these courses vary from company to company and ...


Sustainable Bus Stop: Design & Pre-Construction, Nadov O. Rader Mar 2021

Sustainable Bus Stop: Design & Pre-Construction, Nadov O. Rader

Construction Management

The objective of this project is to design and prepare to build a sustainable bus stop for the City of San Luis Obispo (SLO). Compiled are pre-construction plans and documents for delivery of a sustainable bus stop. All pre-construction services include: project budget/estimates, construction plans and specifications including architectural and electrical plans, timeline/schedule, and materials lists. With a strong focus on sustainability, the design incorporates the use of photovoltaic panels as a form of renewable energy to power features of the sheltered bus stop. This includes a light fixture and a pump to use collected rainwater to nourish ...


Project G.H.O.S.T., Matthew Morell, Austin Conrad, Zackeris Gordon, Conan Estes Mar 2021

Project G.H.O.S.T., Matthew Morell, Austin Conrad, Zackeris Gordon, Conan Estes

Mechanical Engineering

Project G.H.O.S.T aimed to produce a model transmission with a control system for high performance/racing electric vehicles to utilize the full capability of the electric motor at higher speed applications. Current electric vehicles have a large amount of torque and use a fixed gear ratio that compromises between both high and low speeds with performance peaking around 65 miles per hour. A typical electric motor used in this application has approximately 1800 ft-lbs of torque up to 5,000 rpm. Past approximately 5,000 rpm, the torque rapidly drops off and so does the overall ...


Final Design Report Cal Poly Wind Power - Balancing System, Caleb Seth Cross, Ethan Andrew Czuppa Mar 2021

Final Design Report Cal Poly Wind Power - Balancing System, Caleb Seth Cross, Ethan Andrew Czuppa

Mechanical Engineering

The Cal Poly Wind Power club is anticipating joining the annual Collegiate Wind Competition in the year 2021. This competition hosts schools from all around the country, who meet and compete against each other by testing the wind turbines they have made throughout the academic school year. Tasks included in the competition test the wind turbine’s efficiency, power generation, overall design, and stability in extreme conditions.

Cal Poly is planning to implement a formal balancing system to support their 2021 wind turbine. Our senior project team undertook mitigating mass imbalance in the wind turbine; mass imbalance occurs when the ...


Wind Blade Manufacturing For The Cal Poly Wind Power Club, Benjamin E. Thompson, Jake R. Lund, Claudia C. Angeles Mar 2021

Wind Blade Manufacturing For The Cal Poly Wind Power Club, Benjamin E. Thompson, Jake R. Lund, Claudia C. Angeles

Mechanical Engineering

The Cal Poly Wind Power Club is entering the 2021 Collegiate Wind Competition (CWC) in June. Last year, three senior project teams were assigned to collaborate and assist the club with the pitching mechanism, the rotor balancing, and the manufacturing process. As the manufacturing team, the goal of our project was to design a manufacturing process for the bladegeometry given. The manufacturing process was required to meet the team’s expectations and CWC’s performance requirements to place highly in the competition taking place in June 2021.These expectations included creating a manufacturing process that is repeatable and reliable for ...


The Effects Of Waste Marble Powder On Sustainable Concrete, Jeremy S. Tennesen Mar 2021

The Effects Of Waste Marble Powder On Sustainable Concrete, Jeremy S. Tennesen

Construction Management

Sustainability has been growing consistently more popular in construction, with projects introducing innovative ideas to build greener every year. One material that has not experienced many innovations since emerging in building use is concrete. The reason behind this could be the chemical process of curing concrete being unique compared to most materials. While concrete can be broken down into some of its original components, water, cement, and admixtures used are not retainable. This makes it difficult to recycle the material, and the aggregates recovered from recycling also experience a loss in strength. With admixtures being involved in most concrete mixes ...


Case Study: Infection Control On The Arroyo Grande Community Hospital Emergency Room Expansion And Remodel Project, Daniel E. Romero Mar 2021

Case Study: Infection Control On The Arroyo Grande Community Hospital Emergency Room Expansion And Remodel Project, Daniel E. Romero

Construction Management

California hospital and healthcare projects typically involve California’s Office of Statewide Health Planning and Department (OSHPD) which is governed by the state of California and the Fire Marshal. Along with OHSPD as the governing organization, healthcare and hospital projects often must incorporate infection control practices. The Arroyo Grande Community Hospital Emergency Room Expansions and Remodel project incorporated infectious control practices. Qualitative research was conducted through semi-structured interviews of the project management team along with primary and secondary sources. The tools and practices used on this project included negative air machines, temporary walls with sound barriers, zip walls with fire ...


How Green Buildings Effect Both Price And Desire In The Real Estate Housing Market, Bryson Lino Mar 2021

How Green Buildings Effect Both Price And Desire In The Real Estate Housing Market, Bryson Lino

Construction Management

There has been a recent emphasis on green building certification. Unlike other conventional building approaches, green building has emerged as a sustainable way of building in the real estate housing market. As a result of the green building revolution, the real estate developers have been prompted to acknowledge the essence of environmental and social factors on the investment properties’ value. It is through such a paradigm shift that the green building has redefined the real estate business. Given that climate change has emerged as a major global issue, interventions have been made to avert the emission of high levels of ...


Indispensable Homes In Third World Countries: Constructing A Home In Tijuana, Mexico, Myles Hubers Mar 2021

Indispensable Homes In Third World Countries: Constructing A Home In Tijuana, Mexico, Myles Hubers

Construction Management

This project was created to explore a way in which poverty around the world could ultimately be reduced. The way in which this project intends to demonstrate a method used to reduce poverty is by building a home for a specific family in Tijuana, Mexico. In doing so, this home will act as a model home for a manual, comprised of steps that should be taken to construct similar homes throughout any third world country. The goal of this project is to highlight the importance of poverty in the world while also creating a buildable solution in order to reduce ...


Common Issues Of Compliance With Personal Protective Equipment For Construction Workers, Alexandra N. Gattuso Mar 2021

Common Issues Of Compliance With Personal Protective Equipment For Construction Workers, Alexandra N. Gattuso

Construction Management

Personal Protective Equipment (PPE) is an essential component to the safety of workers on construction jobsites. Construction is ranked one of the most dangerous industries to work in, with the highest reports of fatal work injuries. For this reason, it is required that construction employees wear PPE to keep them safe during work. Despite this requirement, many workers neglect to wear PPE, exposing themselves to high risk of injury and death. A survey was conducted on thirty-three (33) construction workers in California to gain a better understanding of issues with PPE and reasons for non-compliance. The survey found that only ...


Solar Soiling Mitigation, Claire Desmith Mar 2021

Solar Soiling Mitigation, Claire Desmith

Electrical Engineering

This senior project aims to mitigate performance losses that occur in Photovoltaic (PV) systems due to soiling of the panels. Soiling is the natural occurrence of debris accumulation on panels, depending on local climate conditions. Soiling loss refers to efficiency lost due to dirt and dust accumulation on the panels. The debris reduces system output by shading on a smaller scale. In addition to uniform soiling, corner soiling is observed in framed modules as debris collects in the corners of the modules. While solutions currently exist to clean modules to mitigate soiling losses, these solutions are often expensive and time ...


Pomegranate: Procedural 3d Tree Creation Via User-Defined L-Systems, Jeremy Berchtold Mar 2021

Pomegranate: Procedural 3d Tree Creation Via User-Defined L-Systems, Jeremy Berchtold

Computer Science and Software Engineering

Pomegranate creates procedural 3D trees based on a user-specified template. The template supports randomness and allows users to generate an entire forest of unique trees from a single template. The output trees are a single closed mesh without intersecting geometry (with the exception of leaves). Additionally, the output contains a skeletal rig used for animating the trees. Pomegranate produces textured trees that can use either a realistic or stylized look, as well as supporting different mesh densities for games or film. Since this project uses a procedural workflow, artists can quickly create and make edits to their trees. This increase ...


Controller Modeling And Stability Analysis Of Multiple Input Single Output Dc-Dc Converter, Astha Adhikari Mar 2021

Controller Modeling And Stability Analysis Of Multiple Input Single Output Dc-Dc Converter, Astha Adhikari

Master's Theses

This thesis entails the stability analysis of the Multiple Input Single Output (MISO) DC-DC converter developed for the DC House Project at Cal Poly. A frequency domain control system model of the MISO converter was designed and constructed using MATLAB Simulink. Transfer functions were derived and modeled for each stage of the converter to best fit the converter circuit system used in the original MISO circuit. Stability metrics such as overshoot, undershoot, rise time, phase margin and gain margin were measured to evaluate and analyze the stability of the converter. These metrics were measured with the original model including the ...


Development Of A Hybrid Particle Continuum Solver, Anthony J. Gay Mar 2021

Development Of A Hybrid Particle Continuum Solver, Anthony J. Gay

Master's Theses

When simulating complex flows, there are some physical situations that exhibit large fluctuations in particle density such as: planetary reentry, ablation due to arcing, rocket exhaust plumes, etc. When simulating these events, a high level of physical accuracy can be achieved with kinetic methods otherwise known as particle methods. However, this high level of physical accuracy requires large amounts of computation time. If the simulated flow is in collisional equilibrium, then less computationally intensive continuum methods, otherwise known as fluid methods, can be utilized. Hybrid Particle-Continuum (HPC) codes attempt to blend particle and fluid solutions in order to reduce computation ...


Early Wildfire Detection With Line Sensors, Virginia Yan Mar 2021

Early Wildfire Detection With Line Sensors, Virginia Yan

Master's Theses

Over the last few years, wildfires have become more devastating to communities as the fires are inevitably destructive to many homes, businesses, and ecosystems. Frequent wildfires also pose a significant threat to power grids and nearby residents as they can damage transmission lines and other electrical equipment, which in turn can cause major power shutdowns. Especially in western U.S., severe drought conditions and weather variability cause residents to become more vulnerable to wildfire disasters as their safety is threatened. We are incompetent to control the wildfires effectively despite existing advanced technologies. Hence, an algorithm based on energy conservation and ...


A Method For Visualizing The Structural Complexity Of Organizational Architectures, Jacob Michael B. King Mar 2021

A Method For Visualizing The Structural Complexity Of Organizational Architectures, Jacob Michael B. King

Master's Theses

To achieve a high level of performance and efficiency, contemporary aerospace systems must become increasingly complex. While complexity management traditionally focuses on a product’s components and their interconnectedness, organizational representation in complexity analysis is just as essential. This thesis addresses this organizational aspect of complexity through an Organizational Complexity Metric (OCM) to aid complexity management. The OCM augments Sinha’s structural complexity metric for product architectures into a metric that can be applied to organizations. Utilizing nested numerical design structure matrices (DSMs), a compact visual representation of organizational complexity was developed. Within the nested numerical DSM are existing organizational ...


Development Of A Robust Methodology To Obtain And Assess Myogenic Precursor Cells For Their Use In Regenerative Therapies, Ricardo Lasa Mar 2021

Development Of A Robust Methodology To Obtain And Assess Myogenic Precursor Cells For Their Use In Regenerative Therapies, Ricardo Lasa

Master's Theses

Peripheral arterial occlusive disease (PAOD) is characterized by buildup of atherosclerotic plaque in peripheral arteries that leads to an occlusion that can interrupt the supply of blood to the peripheral tissue, causing downstream tissue ischemia/hypoxia. PAOD is estimated to affect over 200 million patients worldwide. Current surgical revascularization treatments can be effective in about half of the patient population, leading to a significant number of patients with no treatment options beyond pharmacological intervention and lifestyle modification. The decrease in blood flow downstream of the occlusion leads to increased blood pressure gradient in the microvasculature, specifically in vessels that connect ...