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Semantic Segmentation Of Point Cloud Sequences Using Point Transformer V3, Marion Sisk
Semantic Segmentation Of Point Cloud Sequences Using Point Transformer V3, Marion Sisk
Master's Theses
Semantic segmentation of point clouds is a basic step for many autonomous systems including automobiles. In autonomous driving systems, LiDAR sensors are frequently used to produce point cloud sequences that allow the system to perceive the environment and navigate safely. Modern machine learning techniques for segmentation have predominately focused on single-scan segmentation, however sequence segmentation has often proven to perform better on common segmentation metrics. Using the popular Semantic KITTI dataset, we show that by providing point cloud sequences to a segmentation pipeline based on Point Transformer v3, we increase the segmentation performance between seven and fifteen percent when compared …
A 2-D Numerical Model For Evaluating Daylight Penetration In Short Tunnels For Enhanced Driver Safety, Joachim James
A 2-D Numerical Model For Evaluating Daylight Penetration In Short Tunnels For Enhanced Driver Safety, Joachim James
Master's Theses
It is commonly assumed that daylight will adequately penetrate short tunnels, leading to the misconception that artificial lighting is unnecessary during the daytime. Past studies revealed higher frequency of crashes in short tunnels and despite that there is lack of national guidelines warranting artificial lighting for short tunnels. Inadequately lit tunnels pose safety risks, while excessive lighting can be costly. Hence, it becomes crucial to investigate the extent of daylight penetration in short tunnels and identify disappearance zones within these tunnels. This research can help determine the necessity of artificial lighting, and which specific areas of the tunnel require lighting. …
Investigation Of Surface Chemistry From Electron Irradiation Of Synthetic Schreibersite, Tyler Davis
Investigation Of Surface Chemistry From Electron Irradiation Of Synthetic Schreibersite, Tyler Davis
Master's Theses
While phosphorus is one of the key elements for life on Earth, it has relatively low abundance in extraterrestrial environments, making it a target for astronomers and astrobiologists interested in the possibility of life beyond our planet. Schreibersite (Fe,Ni)3P is one of the first P-containing minerals to condense during planetary cooling and one of the primary P-containing minerals in iron and stony-iron meteorites. Therefore, it is a likely P-bearing mineral in cometary cores and dust grains within the interstellar medium and circumstellar envelopes. Experiments in this project were performed with the aim of observing the formation of small …
Characterizing The Ecological Impacts Of Utility-Scale Solar Energy (Usse) On Fallowed Farmland, Amanda Gersoff
Characterizing The Ecological Impacts Of Utility-Scale Solar Energy (Usse) On Fallowed Farmland, Amanda Gersoff
Master's Theses
Large-scale carbon-free energy generation projects such as utility-scale solar energy (USSE) arrays help mitigate the energy sector’s contribution to climate change and are rapidly expanding throughout the U.S. However, the expansion of USSE sites is associated with immediate and longer-term ecological impacts, many of which have yet to be assessed. Quantifying the ecological impacts of USSE arrays will help to identify synergies and trade-offs between energy generation and terrestrial conservation goals. The overall goal of this research is to characterize the ecological impacts of USSE sites located on fallowed farmlands in San Luis Obispo County, California in a seasonally explicit …
Modulation Of Optoelectronic Properties Of Electron Rich Pyrrolopyrroles Via Peripheral Alterations, Lillian Daniel
Modulation Of Optoelectronic Properties Of Electron Rich Pyrrolopyrroles Via Peripheral Alterations, Lillian Daniel
Master's Theses
Understanding structure-property relationships of π-conjugated chromophores based on peripheral functionalization is important for the continued development of various organic electronic applications. 1,4-Dihydropyrrolo[3,2-b]pyrroles (DHPPs) are synthetically simple chromophores with tailorable optical and electrochemical properties based on the functionalities of the starting materials. The overarching goal of this thesis is to understand how peripheral functionalization strategies enable distinctly different optical and electrochemical properties that may be useful for various applications. Motivated by the synthetic simplicity and tunability of DHPPs, molecules with varying design motifs were synthesized to exhibit how functionality influences optical and electrochemical properties. First, two molecules with varying …
Species Delimitation Of Slimy Salamanders, Plethodon Kisatchie And Plethodon Mississippi, Across The Lower Mississippi River, Brock Hunter Stevenson
Species Delimitation Of Slimy Salamanders, Plethodon Kisatchie And Plethodon Mississippi, Across The Lower Mississippi River, Brock Hunter Stevenson
Master's Theses
Species are fundamental units of biodiversity yet delimiting species can be challenging. Slimy Salamanders of the Plethodon glutinosus species complex are a classic example of cryptic species for which species boundaries and relationships have proved difficult to determine. Once thought to be a single species ranging across the eastern United States, protein analysis revealed high genetic divergences among geographically distinct groups of populations, leading to 16 species being recognized within the group. Two of these species, the Louisiana Slimy Salamander (Plethodon kisatchie) and the Mississippi Slimy Salamander (Plethodon mississippi), are closely related but occur on opposite sides of the Mississippi …
Evaluating A Common Book Program's Effect On Gains In Knowledge And Position Toward Sustainability In The Nutrition Professions, Hallie Lanice Shupe
Evaluating A Common Book Program's Effect On Gains In Knowledge And Position Toward Sustainability In The Nutrition Professions, Hallie Lanice Shupe
Master's Theses
A Common Reader Program, also called a common book, summer reading, or a one-book program, has been reported to enhance the college educational experience yet appears to have been underutilized by colleges and universities. In the case of health sciences, there can be great benefits in having students learn from the literature not typically found in textbooks used in the curricula. Common reader programs allow for different teaching methods to be implemented and using multiple teaching methods in a single program can be beneficial. In nutrition and dietetics (ND) programs there is a need for additional education regarding sustainability in …
Development Of A Cell Culture Incubator Capable Of Providing A Hypoxic Environment, Grant Austin Coe
Development Of A Cell Culture Incubator Capable Of Providing A Hypoxic Environment, Grant Austin Coe
Master's Theses
In order to perform more robust and physiologically relevant research, the Microphysiological Systems laboratory required a method of culturing cells where the level of oxygen could be adjusted. To fulfill this need, I designed and manufactured a hypoxic cell culture incubator. I employed a Quality Function Deployment to understand the customer requirements and convert them into engineering specifications. Based on these specifications, I created various conceptual designs. I evaluated the conceptual designs as compared to existing products and decided to move forward with the control system separated from a small, standard chamber. I developed the circuitry schematics for the temperature …
Supersonic Air Inlet Modeling Using The Method Of Characteristics, Shay S. Takei
Supersonic Air Inlet Modeling Using The Method Of Characteristics, Shay S. Takei
Master's Theses
The Air Inlet Method of Characteristics Analysis Tool (AIMCAT), a tool based in Python 3, is developed to model supersonic air inlet geometries during the early phases of design. The method of characteristics (MOC) is used to solve the governing equations for an inviscid, irrotational, isentropic, steady, supersonic flowfield. A comparison is made between modeling shock waves implicitly using Mach wave coalescence and modeling them explicitly using oblique shock relations. Multiple test cases are used to assess the accuracy of the tool by comparing to experimental wind tunnel data. Good general agreement was achieved over the majority of the supersonic …
Development Of Electrical Impedance Tomography Data Acquisition System And Deep Learning-Based Reconstruction Algorithms For Spatial Damage Detection, Damond Michael Li
Development Of Electrical Impedance Tomography Data Acquisition System And Deep Learning-Based Reconstruction Algorithms For Spatial Damage Detection, Damond Michael Li
Master's Theses
Electrical impedance tomography (EIT) is a non-destructive, non-invasive, and non-radioactive imaging technique used for reconstructing the internal conductivity distribution of a sensing domain. Performing EIT often requires large, stationary benchtop equipment that can be expensive and impractical. Other researchers have attempted to make portable EIT systems, but they all rely on external computation for image reconstruction/data analysis. This study outlines the development of a low-cost, portable, and wireless EIT data acquisition (DAQ) system that is capable of independently performing image reconstructions on-board. With the proposed system, EIT can be performed on carbon fiber reinforced polymers to spatially locate damages. Since …
A Sindy Hardware Accelerator For Efficient System Identification On Edge Devices, Michael Sean Gallagher
A Sindy Hardware Accelerator For Efficient System Identification On Edge Devices, Michael Sean Gallagher
Master's Theses
The SINDy (Sparse Identification of Non-linear Dynamics) algorithm is a method of turning a set of data representing non-linear dynamics into a much smaller set of equations comprised of non-linear functions summed together. This provides a human readable system model the represents the dynamic system analyzed. The SINDy algorithm is important for a variety of applications, including high precision industrial and robotic applications. A Hardware Accelerator was designed to decrease the time spent doing calculations. This thesis proposes an efficient hardware accelerator approach for a broad range of applications that use SINDy and similar system identification algorithms. The accelerator is …
Automated Tree Mortality Detection Using Ubiquitously Available Public Data, Michael T. Huggins
Automated Tree Mortality Detection Using Ubiquitously Available Public Data, Michael T. Huggins
Master's Theses
Understanding the dynamic interplay between fire severity, topography, and tree mortality, is crucial for predicting future forest dynamics and enhancing resilience against climate change-induced wildfire regimes. This thesis develops a multi-sensor approach for automated estimation of tree mortality, then applies it to examine trends in tree mortality over a six-year period across a fire affected study site in the Trinity River basin in Northern California. The Random Forest model uses publicly available USGS 3D Elevation Program Lidar (3DEP) and NAIP imagery as inputs and is likely to be easily adaptable to other landscapes. The model had a Receiver Operating Characteristic …
Mary Ann Starkey: Domesticity & Political Leadership In New Bern, North Carolina During The Civil War, Julie A. Zafiratos
Mary Ann Starkey: Domesticity & Political Leadership In New Bern, North Carolina During The Civil War, Julie A. Zafiratos
Master's Theses
Mary Ann Starkey was a pivotal change agent in New Bern, North Carolina during the Civil War. She was born into slavery, yet by 1863 was in a position to bring together abolitionists and recruiters from the North and refugees and freedom fighters from her community. She was president of the 400-member Colored Women’s Union Relief Association of Newbern, North Carolina which worked to heal, feed and support the first colored regiments in North Carolina in their fight for freedom. This thesis looks closely at the Civil War through the life of this one woman, by examining the archival evidence …
Stress Effects On The Growth Physiology Of Pacific Rockfishes (Sebastes Spp.): Negative Impacts Of Cortisol And Elevated Temperature Exposure, Hayley M. Mapes
Stress Effects On The Growth Physiology Of Pacific Rockfishes (Sebastes Spp.): Negative Impacts Of Cortisol And Elevated Temperature Exposure, Hayley M. Mapes
Master's Theses
Fish experiencing stressful conditions increase production of the glucocorticoid hormone cortisol, which alters energy intake and allocation to help recover physiological homeostasis. Fish experiencing prolonged elevations of cortisol, however, often exhibit reduced somatic growth. While it has been shown previously in fish that cortisol inhibits anabolic growth processes in part via changes in endocrine growth hormone (Gh)/insulin- like growth factor-1 (Igf1) signaling, it is not fully understood which components of Gh/Igf1 pathways are modulated by cortisol. Here, we explored how cortisol influences the Gh/Igf1 system in blue rockfish (Sebastes mystinus) by administering exogenous cortisol and examining effects on …
A Study On Ethical Hacking In Cybersecurity Education Within The United States, Jordan Chew
A Study On Ethical Hacking In Cybersecurity Education Within The United States, Jordan Chew
Master's Theses
As the field of computer security continues to grow, it becomes increasingly important to educate the next generation of security professionals. However, much of the current education landscape primarily focuses on teaching defensive skills. Teaching offensive security, otherwise known as ethical hacking, is an important component in the education of all students who hope to contribute to the field of cybersecurity. Doing so requires a careful consideration of what ethical, legal, and practical issues arise from teaching students skills that can be used to cause harm. In this thesis, we first examine the current state of cybersecurity education in the …
Coralai: Emergent Ecosystems Of Neural Cellular Automata, Aidan A. Barbieux, Aidan A. Barbieux
Coralai: Emergent Ecosystems Of Neural Cellular Automata, Aidan A. Barbieux, Aidan A. Barbieux
Master's Theses
Artificial intelligence has traditionally been approached through centralized architectures and optimization of specific metrics on large datasets. However, the frontiers of fields spanning cognitive science, biology, physics, and computer science suggest that intelligence is better understood as a multi-scale, decentralized, emergent phenomenon. As such, scaling up approaches that mirror the natural world may be one of the next big advances in AI. This thesis presents Coralai, a framework for efficiently simulating the emergence of diverse artificial life ecosystems integrated with modular physics. The key innovations of Coralai include: 1) Hosting diverse Neural Cellular Automata organisms in the same simulation that …
Improving Automatic Transcription Using Natural Language Processing, Anna Kiefer
Improving Automatic Transcription Using Natural Language Processing, Anna Kiefer
Master's Theses
Digital Democracy is a CalMatters and California Polytechnic State University initia-
tive to promote transparency in state government by increasing access to the Califor-
nia legislature. While Digital Democracy is made up of many resources, one founda-
tional step of the project is obtaining accurate, timely transcripts of California Senate
and Assembly hearings. The information extracted from these transcripts provides
crucial data for subsequent steps in the pipeline. In the context of Digital Democracy,
upleveling is when humans verify, correct, and annotate the transcript results after
the legislative hearings have been automatically transcribed. The upleveling process
is done with the …
Spatial Drivers Of Soil Health In A Post-Fire Watershed, Reed Jd Williams
Spatial Drivers Of Soil Health In A Post-Fire Watershed, Reed Jd Williams
Master's Theses
Wildland fires are increasing in both severity and intensity leading to severe and lasting biogeochemical effects on soil. The CZU lightning complex started on August 16th, 2020, and burned 86,509 acres causing severe social and ecological damage. To better understand the impact of fire on soil properties at the landscape scale, we created a digital soil mapping model with the inclusion of remotely sensed burn severity covariates. We combined a raster-stack of environmental covariates with rasters for fire severity and soil samples, to disentangle the relative contribution of fire to the spatial distribution of soil properties in the …
Effects Of Temperature On Economic Preferences: A Cross-Cultural Laboratory Study Of Prosocial Behavior, Nikita Tkachenko
Effects Of Temperature On Economic Preferences: A Cross-Cultural Laboratory Study Of Prosocial Behavior, Nikita Tkachenko
Master's Theses
In light of the pressing issue of climate change, our study investigates the implications of rising temperatures on social and economic behaviors through a laboratory experiment conducted among students at university sites in Mexico, India, Kenya, Colombia, and the United States. This paper examines the influence of temperature differences and exposure length on economic decision-making among students at university sites in Mexico, Kenya, and the United States. Analyzing data from the dictator game, we explored how temperature, both ambient and wet bulb, and session length affect prosocial behavior. Our results suggest a link between temperature measures and prosocial behavior, with …
Habitat Characterization Of American Badgers (Taxidea Taxus) Of Northern California, Mitchell Victoria
Habitat Characterization Of American Badgers (Taxidea Taxus) Of Northern California, Mitchell Victoria
Master's Theses
American badgers (Taxidea taxus) are a semi fossorial mammal that lives in grassland and open prairie ecosystems as well as coastal prairies, agricultural fields, deserts, and deforested habitats. Many researchers have published work on badgers, but we still require more information on their ecology. The American badger is a semi fossorial, solitary, predatory mammal of grassland ecosystems. They are classified as mesopredators when compared to larger apex predators such as brown bears, wolves, and pumas. However, when larger carnivores are absent, Badgers become apex predators of their ecosystems. Los Vaqueros Watershed in Brentwood, California, was my study site because badgers …
Determining Best Diet And Temperature Regime Of Monkeyface Pricklebacks (Cebidichthys Violaceus) For Aquaculture, Luke C. Townsend
Determining Best Diet And Temperature Regime Of Monkeyface Pricklebacks (Cebidichthys Violaceus) For Aquaculture, Luke C. Townsend
Master's Theses
Wild freshwater eel populations are threatened due to overfishing and habitat degradation. Attempts to use aquaculture to close the eel life cycle have yet to be commercially adapted, owing largely to their complex lifecycle. Monkeyface pricklebacks (Cebidichthys violaceus) are intertidal fish that may serve as an alternative species for freshwater eels in aquaculture, as they possess several beneficial characteristics. This study aimed to optimize diet and culture temperatures to maximize monkeyface prickleback cultures by measuring growth, condition, metabolic rates, fillet composition, and critical thermal maximum (CTmax) of juvenile fish that were reared in two separate experiments: (1) on four different …
Data-Driven Control Of Acoustic Waves Using Movable And Flexible Scatterers, Noam Smilovich
Data-Driven Control Of Acoustic Waves Using Movable And Flexible Scatterers, Noam Smilovich
Master's Theses
Partial Differential Equations (PDEs) serve as fundamental tools in scientific and engineering disciplines, modeling phenomena ranging from material design to climate dynamics. Developing robotic systems capable of controlling PDE-governed systems, particularly when these phenomena are only partially observable, has the potential to drive significant technological advancements. This work presents a framework that leverages physics-informed machine learning (ML) for the control of PDEs. At the core of this approach is an agent equipped with sensors that generate a low-dimensional, physics-informed representation of the environment, enabling the derivation of optimal sparse control policies for the agent’s actuators. The focus is on manipulating …
Assessing The Effectiveness Of Non-Traditional Climate Change Communication Tools In The City Of Santa Cruz, Saara Ranabhat
Assessing The Effectiveness Of Non-Traditional Climate Change Communication Tools In The City Of Santa Cruz, Saara Ranabhat
Master's Theses
Coastal cities face significant challenges from climate-induced coastal hazards. The City of Santa Cruz is a medium-sized municipality in Monterey Bay on California's Central Coast with over $1 billion worth of property and infrastructure at risk to climate-induced coastal hazards by 2100. However, city officials have noticed a lack of representation of climate-vulnerable communities in the development of various climate adaptation plans and policies. In order to remedy this problem, the City is experimenting with various climate change communication tools, such as virtual reality (VR), card games, murals, and comic books, in collaboration with different agencies. But limited understanding exists …
The Relationship Between Communication With Coworkers And Job Satisfaction Among Teleworkers: The Moderating Role Of Communication Modality, Madison L. Mariano
The Relationship Between Communication With Coworkers And Job Satisfaction Among Teleworkers: The Moderating Role Of Communication Modality, Madison L. Mariano
Master's Theses
Teleworking has become increasingly prevalent due to public health concerns and advancements in communication technologies. While organizations should take steps to promote job satisfaction among teleworkers, there is little research on the predictors of job satisfaction among full-time teleworkers. Specifically, few studies have focused on how coworker communication might impact job satisfaction among full-time teleworkers. This study focused on this gap in the literature by examining the relationship between the frequency of communication with coworkers and job satisfaction and the moderating role of communication modality. Communication modality refers to a form of communication technology available to teleworkers, ranging from rich …
Justice And Equity In Urban Water Allocations And Conservation Solutions: A Case Study Of Non-Traditional Housing Dwellers, Matthew J. Mangoni
Justice And Equity In Urban Water Allocations And Conservation Solutions: A Case Study Of Non-Traditional Housing Dwellers, Matthew J. Mangoni
Master's Theses
Access to water is a human right. With droughts becoming more frequent and severe, equitable and just access to fresh water is a critical concern for policymakers and regulators. Allocation-based (AB) water rates are used widely to incentivize conservation. Previous authors document benefits of this approach for single family homes (SFH) in urban areas. People living in homeowners’ associations (HOAs) or multi-family homes and renters – commonly grouped as non-traditional housing (NTH) tend to face barriers to understanding or controlling water use and costs. This thesis investigates the equity and effectiveness of 1) AB water rate structuring and 2) a …
Unrealvision: A Synthetic Dataset Generator For Human-Pose Estimation And Behavior Analysis, Thinh Lu
Unrealvision: A Synthetic Dataset Generator For Human-Pose Estimation And Behavior Analysis, Thinh Lu
Master's Theses
For over a decade, computer vision (CV) has become an indispensable component of numerous camera surveillance applications as well as intelligent autonomous systems. Thanks to new advances in AI, Edge Computing, and IoT technologies, there is now a rapidly growing number of smart camera devices, industrial and consumer robots that are using computer vision for various applications - from human tracking and analysis, object classification, to visual inspection and anomaly detection. For most common use cases, building vision-based applications can be a straightforward and affordable task thanks to the increasing number of publicly accessible datasets and research publications. However, it …
Unveiling The Cognitive Impact: An Exploratory Study On Food Insecurity And Value-Driven Attentional Capture, Nichole S. Hogoboom
Unveiling The Cognitive Impact: An Exploratory Study On Food Insecurity And Value-Driven Attentional Capture, Nichole S. Hogoboom
Master's Theses
Food insecurities have been shown to lead to serious negative health outcomes such as increased risk for diabetes and obesity in adulthood, food-related mental health and behavioral issues, all of which can have a crossover effect in many areas of a person’s life. This experiment explores whether previous history of food insecurity is associated with how people allocate attention to pictures of food; whether they are prioritizing or ignoring food stimuli in their environment. We hypothesized that the severity of food insecurity experienced in childhood would correlate with attentional bias towards food images, and that how hungry or thirsty participants …
Uncovering Weaknesses In Autonomous Driving: A Formal Approach To Adversarial Scenario Generation And Falsification, Carlos O. Hernandez
Uncovering Weaknesses In Autonomous Driving: A Formal Approach To Adversarial Scenario Generation And Falsification, Carlos O. Hernandez
Master's Theses
Autonomous vehicles utilize advanced safety features like proactive driving assistance and pre-collision alerts to minimize the risk of accidents. However, evaluating the correct functionality of these systems is complex. First, safety systems are highly sophisticated, integrating software, networking, and hardware components, many of which rely on advanced artificial intelligence and machine learning algorithms. Second, an array of dynamic factors, including numerous actors and physical variables, can influence the performance of safety mechanisms during critical scenarios. Each actor’s unique behavior introduces unpredictability, making it difficult to anticipate future states and outcomes. This thesis presents a comprehensive framework for testing autonomous vehicle …
Synthesizing Physiology With Aquaculture For Olympia Oyster Restoration In Elkhorn Slough, Ca, Jacob Harris
Synthesizing Physiology With Aquaculture For Olympia Oyster Restoration In Elkhorn Slough, Ca, Jacob Harris
Master's Theses
Conservation aquaculture is an emerging restoration strategy for depleted and low-density foundation species. It was recently applied for Olympia oysters in California. The only native oyster species is at risk of local extinction in much of its range. Conservation aquaculture can support oyster abundance, but long-term restoration success will be constrained by habitat conditions that suppress early growth and reproductive fitness. Following years of reproduction failure in Elkhorn Slough, CA, we examined these two critical life stages: juvenile and brooding. Our aim was to improve restoration by evaluating aquaculture methods and studying their physiology. We tested site parameters, oyster size, …
Assessing Sediment Migration And Salmonid Habitat Recovery Following A Small Dam Removal And A Flood, Mill Creek, California, Usa, Madeline C. Doyle
Assessing Sediment Migration And Salmonid Habitat Recovery Following A Small Dam Removal And A Flood, Mill Creek, California, Usa, Madeline C. Doyle
Master's Theses
In 2021, the lower Mill Creek Dam (~4 m tall, ~8 m wide) was removed from the Mill Creek-San Vicente Creek watershed (18 km2), located in the Santa Cruz Mountains. Topographic surveys and pebble counts were performed at 27 transects four times between 2021 and 2023 to compare changes in channel characteristics and grain size to document the response to a small dam removal and the transition between drought and flood conditions. The goals of this study were to: (1) describe the movement of impounded sediment; (2) assess the success of habitat restoration for two endangered anadromous fish species: coho …