Digital Commons Network^™

Pedestrian Compliance With Concurrent And Exclusive Phasing At Traffic Signals, Kevin R. Mckernan

Master's Theses

Exclusive and concurrent phasing are the two primary traffic signal treatments for pedestrians in the state of Connecticut. Exclusive phasing, which shuts down an intersection to vehicular traffic, is commonly believed to be safer while concurrent phasing, which moves pedestrian and vehicular traffic at the same time, is often seen as more efficient. Research into the subject acknowledges that, while they exist, the safety benefits of exclusive phasing are only possible when pedestrians are compliant and cross roadways when told to by the traffic control device.

This thesis describes a comparison of pedestrian compliance between exclusive and concurrent phasing for …

Modeling And Test Of The Efficiency Of Electronic Speed Controllers For Brushless Dc Motors, Clayton R. Green

Master's Theses

Small electric uninhabited aerial vehicles (UAV) represent a rapidly expanding market requiring optimization in both efficiency and weight; efficiency is critical during cruise or loiter where the vehicle operates at part power for up to 99% of the mission time. Of the four components (battery, motor, propeller, and electronic speed controller (ESC)) of the electric propulsion system used in small UAVs, the ESC has no accepted performance model and almost no published performance data. To collect performance data, instrumentation was developed to measure electrical power in and out of the ESC using the two wattmeter method and current sense resistors; …

Characterization Of Electrophorectic Separations On A Cellulose Paper-Microfluidic Chip, Kyle Robert Fast

Master's Theses

The purpose of this thesis project is to demonstrate the ability to utilize electrophoresis in a cellulose paper microfluidic chip to manipulate charged particles. Materials were selected and a manufacturing protocol was created to successfully apply the electric field onto the paper chip. Experiments were performed to characterize the separation rates for charged, colorimetric dye, Orange G in the membrane as a function of an applied electric field, dye concentration, and distance traveled. The experiments confirmed that the electric field can be applied to the chip and particle separation rates were characterized. Next, the determined rates results were used to …

Demographics And Transfer Of Escherichia Coli Within Bos Taurus Populations, Joshua Ryan Dillard

Master's Theses

In the United States, symptoms caused by pathogenic strains of Escherichia coli are on the rise. A major source of these pathogenic strains is the E. coli in the digestive tract of cattle. The purpose of this project was to determine if E. coli are transferred between individuals of the same species and if interspecies transmission is possible. Proximity of cattle was also studied as a contributing factor to the transfer of E. coli. To accomplish this goal, E. coli isolates from cattle and cohabitating ground squirrels were compared through a new method of bacterial strain typing called pyroprinting. …

Effects Of Testosterone On The Spatial Ecology, Coloration, And Brain Regions In Western Fence Lizards, Sceloporus Occidentalis, Rachel Catharine Wilson

Master's Theses

An organism’s spatial ecology allows for access to essential resources such as food, mates, and escape from predators. Home range size, or the total area an organism inhabits, varies in relation to numerous factors including seasonality. During the breeding season, home range size increases in males across taxa. In addition, males usually also have larger home range sizes than females. This implicates testosterone (T) as a possible mediator of this relationship. Indeed, T causes an increase in home range size of males in numerous species of lizards. In addition to T causing an increase in home range size, it also …

The Effects Of Massage On Perceived Physical Soreness, Pain And Markers Of Inflammation Following High Intensity Unaccustomed Exercise, Courtney Lynn Crow

Master's Theses

Massage is often recommended to athletes to facilitate recovery and attenuate DOMS. The purpose of this study was to investigate the effects of massage on perceived muscle soreness and pain, inflammatory and immune markers, ROM, and mood state. Fourteen, recreationally active, women participated in a randomized crossover design study, consisting of 1) 60 min. full body massage following unaccustomed exercise and 2) 60 min. of rest. following unaccustomed exercise. Perceived muscle soreness and pain, active range of motion (ROM), mood state, along with blood concentrations of interleukin-6 (IL-6), C-reactive protein (CRP), creatine kinase (CK), and neutrophil count (NC), was assessed …

A Hybrid Approach To General Information Extraction, Marie Belen Grap

Master's Theses

Information Extraction (IE) is the process of analyzing documents and identifying desired pieces of information within them. Many IE systems have been developed over the last couple of decades, but there is still room for improvement as IE remains an open problem for researchers. This work discusses the development of a hybrid IE system that attempts to combine the strengths of rule-based and statistical IE systems while avoiding their unique pitfalls in order to achieve high performance for any type of information on any type of document. Test results show that this system operates competitively in cases where target information …

An Investigation Into Partitioning Algorithms For Automatic Heterogeneous Compilers, Antonio M. Leija

Master's Theses

Automatic Heterogeneous Compilers allows blended hardware-software solutions to be explored without the cost of a full-fledged design team, but limited research exists on current partitioning algorithms responsible for separating hardware and software. The purpose of this thesis is to implement various partitioning algorithms onto the same automatic heterogeneous compiler platform to create an apples to apples comparison for AHC partitioning algorithms. Both estimated outcomes and actual outcomes for the solutions generated are studied and scored. The platform used to implement the algorithms is Cal Poly’s own Twill compiler, created by Doug Gallatin last year. Twill’s original partitioning algorithm is chosen …

Multi-Stress Proteomics: The Global Protein Response To Multiple Environmental Stressors In The Porcelain Crab Petrolisthes Cinctipes, Michael A. Garland

Master's Theses

Global climate change is increasing the number of hot days along the California coast as well as increasing the incidence of off-shore upwelling events that lower the pH of intertidal seawater; thus, intertidal organisms are experiencing an increase in more than one stress simultaneously. This study seeks to characterize the global protein response of the eurythermal porcelain crab Petrolisthes cinctipes to changes in thermal, pH, and tidal regime treatments, either combined or individually. The first experiment examined temperature stress alone and sought to determine the effect of chronic temperature acclimation on the acute heat shock response. We compared the proteomic …

Development Of Cpanel, An Unstructured Panel Code, Using A Modified Tls Velocity Formulation, Christopher R. Satterwhite

Master's Theses

The use of panel codes in the aerospace industry dates back many decades. Recent advances in computer capability have allowed them to evolve, both in speed and complexity, to provide very quick solutions to complex flow fields. By only requiring surface discretization, panel codes offer a faster alternative to volume based methods, delivering a solution in minutes, as opposed to hours or days. Despite their utility, the availability of these codes is very limited due to either cost, or rights restrictions.

This work incorporates modern software development practices, such as unit level testing and version control, into the development of …

The Ble Cloaker: Securing Implantable Medical Device Communication Over Bluetooth Low Energy Links, Taylor Anthony Nesheim

Master's Theses

Historically Implantable Medical Devices (IMDs) such as pacemakers have only been able to communicate to external devices through close proximity means of communication, primarily through inductive telemetry. Because of the unlikelihood of an adversary being able to gain access to an IMD through this type of communication, these devices were never designed with security in mind. However the recent advent of IMDs that are equipped with long-range wireless capabilities has made it necessary to consider how to secure these devices from malicious attacks.

This work presents an implementation of prior work that developed a theoretical security model whose specific intent …

Morphological Response In Sister Taxa Of Woodrats (Genus: Neotoma) Across A Zone Of Secondary Contact, Michaela M. Koenig

Master's Theses

This study focuses on a secondary contact zone between two sister species of woodrat, Neotoma fuscipes (dusky-footed woodrat) and N. macrotis (big-eared woodrat). Along the Nacimiento River, on the border of southern Monterey and northern San Luis Obispo counties, the ranges of these sister species of woodrats meet and overlap forming a secondary contact zone. The zone of secondary contact is estimated to include a 500-meter (~1,650 linear feet) portion of the Nacimiento River riparian corridor.

This research examines quantifiable morphological change that is likely associated with heightened inter-specific competition within the contact zone. When in sympatry the sister species …

Revision-Polyurethane-Graphene Nanocomposites For Corrosion-Resistant Coatings, Alexandra Rose Stevenson

Master's Theses

Corrosion is a prevalent concern throughout the world, causing significant monetary and safety concerns. Research has been dedicated to developing cost-effective solutions for corrosion that will also meet increasingly stringent environmental regulations. The recently discovered nanomaterial graphene has been proposed as a potential component in anticorrosion technology due to its strong air and water barrier properties. However, graphene is a relatively expensive, difficult to synthesize material. By incorporating it into nanocomposites, its properties can be exploited even at low concentrations. Previous work has been conducted involving the preparation of anticorrosive polystyrene-graphene nanocomposites; these materials were found to be effective long-term …

Investigating The Correlation Between Freeway Service Levels And Freeway Service Patrol Assists, Nora Chin

Master's Theses

The Bay Area Metropolitan Transportation Commission’s (MTC) Freeway Service Patrol’s highway motorist response service is reporting a reduction in their service levels. We analyze the relationship between the reduction in the Bay Area Freeway Service Patrol’s (FSP) motorist assists and changes in vehicle miles traveled (VMT), California Highway Patrol (CHP) reported incidents, and cover research on the impact of new and old vehicle fleet turnover. VMT and CHP incidents have differential effects on FSP assists. Although incidents occurring on freeways with high traffic flows tend to cause more congestion, the trend in local VMT along Bay Area freeway corridors does …

How Are Rare Species Maintained?: Reproductive Barriers Between Layia Jonesii, A Rare Serpentine Endemic, And L. Platyglossa, Natalie L. Rossington

Master's Theses

Reproductive barriers are vital to generating new species as well as maintaining distinct species. Investigating reproductive barriers between closely related plant taxa helps us to understand how these barriers are maintained, particularly between rare and widespread relatives. Layia jonesii, a rare San Luis Obispo County serpentine endemic, and L. platyglossa, a common coastal species, co-occur on serpentine derived hillsides and are interfertile. At these locations, L. jonesii is isolated to dry soils near serpentine rock outcrops and L. platyglossa is located on slightly deeper grassland soils surrounding the rock outcrops. On hillsides where they co-occur, I observe two morphologically …

Cognitive Video Streaming, Devaki Rani Pasupuleti

Master's Theses

Video-on-demand (VoD) streaming services are becoming increasingly popular due to their flexibility to allow users to access their favorite video contents anytime, anywhere from a wide range of access devices such as smart phones, computers and TV. The content providers rely on highly satisfied subscribers for revenue generation and there has been significant efforts in developing approaches to “estimate” the quality of experience (QoE) of VoD subscribers. But a key issue is that QoE is not defined, appropriate proxies needs to be found for QoE, via the streaming metrics (the quality of service (QoS) metrics) that are largely based on …

Three-Dimensional Microstructural Imaging And Charge Transport Modeling Tools For Fuel Cell Materials, Matthew B. Degostin

Master's Theses

Fuel cells and other electrochemical energy storage and conversion technologies are increasingly being used as clean energy alternatives for mobile and stationary power generation. The viability of fuel cells as a marketable energy source continues to benefit from improvements in performance, longevity, and cost. Each of these factors is intimately linked to the performance of materials which constitute these systems, leading to significant research dedicated to optimization of underlying fuel cell components and materials. A commonality among fuel cell types is their reliance on effective transport of ions, electrons, and gases through three-dimensional transport networks that have complex underlying structures, …

Measurement Of Forward Flexed Posture In Parkinson’S Disease, Prajakta Ganesh Nair

Master's Theses

No abstract provided.

Modeling High Frequency Wave Propagation In A Three-Dimensionally Heterogeneous Earth, Steven Walsh

Master's Theses

No abstract provided.

Wavelet-Based Feature Extraction Methodology For Pattern Classification In Engineering Applications, Andre A. Silva

Master's Theses

Feature extraction is fundamental in the framework of pattern recognition. In classification applications where raw data is collected from scientific experiments or simulations, the resulting data may have been exposed to noise, excited by external dynamics, or affected by uncertainties not accounted for during the data acquisition process. Furthermore the data can be high dimensional, which can hinder the accuracy of decision algorithms if additional dimensions of the data make the patterns non-separable, not to mention the added computational complexity burden to train such algorithms. The objective of this research is to understand how specially designed features can improve the …

A Derivatization Method For Tagging Low-Molecular Weight Organic Acids In Seawater With A Fluorescent Coumarin, Ashley N. Phillips

Master's Theses

No abstract provided.

Nutrient Dynamics Of Floating Seagrass Wracks In Greater Florida Bay, Rachel A. Perry

Master's Theses

Floating aggregations of seagrass wrack (i.e., leaves shed from seagrass beds) can serve as an ecological “hot spot” contributing to the survival of many species in the form of habitat and food source. Considerable research has been done on assessing trophic transfer of nutrients from seagrass wrack that is washed ashore, but little is known about nutrient dynamics in floating seagrass wrack. Here, drifters were deployed to track the location of floating wracks created in Greater Florida Bay and mesocosm experiments were conducted on two different of floating macrophytes (Syringodium filiforme, Thalassia testudinum, and Sargassum sp.) to estimate …

Evaporation Of Binary Mixtures And Precision Measurement By Crystal Resonator, Hanyu Song

Master's Theses

Theoretical and experimental investigations are presented for the precision measurement of evaporation kinetics of binary mixtures using a quartz crystal resonator. A thin layer of light alcohol mixture including a volatile (methanol) and a much less volatile (1-butanol) components is deployed on top of a crystal resonator for the evaporation experiment. A one-dimensional theoretical model is developed to describe the underlying mass transfer and interfacial transport phenomena. Along with the theoretical analysis, the transient evaporation kinetics, moving interface, and the stratification of viscosity of the liquid mixture during evaporation can be simultaneously measured by the impedance response of the shear …

Client Perceptions Of Engagement In Child Welfare And Housing Services, Katherine Bryce

Master's Theses

For families to benefit from services, they must be engaged. A number of factors in child welfare contribute to client engagement, among them individual, parent and family characteristics, contextual influences, and worker variables. The existing literature offers little insight into families who are experiencing problems in both child welfare and housing needs and how this affects engagement in services. This pilot study examined 10 families and compared client engagement across three conditions: (1) Intensive Supportive Housing for Families (ISHF), (2) Supportive Housing for Families (SHF), and (3) child welfare (DCF) business as (BAU), which differ systematically on elements including case …

The Influence Of Concurrent Exercise Training On Baseline Blood Pressure: A Meta-Analysis, Lauren M. Lamberti

Master's Theses

No abstract provided.

Enzyme Level N And O Isotope Effects Of Assimilatory And Dissimilatory Nitrate Reduction, Lija Treibergs

Master's Theses

Nitrate N and O isotope distributions in the environment can be used to elucidate salient biogeochemical N transformations. In order to do so, it is necessary to know the isotopic imprints characteristic of respective N transformations, and to understand the underlying mechanisms that determine these patterns. In order to provide mechanistic constraints on the isotopic imprints associated with nitrate consuming processes, we measured the enzymatic N and O isotope effects (¹⁵ε and ¹⁸ε) imparted on nitrate by three types of nitrate reductase enzymes, including (a) a prokaryotic respiratory nitrate reductase, Nar, from the heterotrophic denitrifier Paracoccus …

C'Est La Tour De Babel - Le Film Multilingue: Un Défi De La Traduction Audiovisuelle Du 21e Siècle, Alexander S. Croxton Mr.

Master's Theses

No abstract provided.

Evaluation Of Biodegradability And Cell Functionality Of Injectable Glycol Chitosan Hydrogel, Aiswaria Padmanabhan

Master's Theses

No abstract provided.

Crowdsourcing Real-Time Traveler Information Systems, Asif Rehan

Master's Theses

In the last decade, the concept of collecting traffic data using location aware and data enabled smartphones in place of traditional sensor networks has received much attention. With a steady market growth for smartphones enabled with GPS chipsets, the potential of this technology is enormous. This combined with the pervasion of participatory paradigms such as crowdsourcing wherein individuals with portable sensors instead of physical networks serve as sensors providing information. Crowd sensed data overcome a number of issues with traditional physical sensor networks by providing wider coverage, real-time data, data redundancy and cost effectiveness to name a few. While there …

Winter Deicing Effects On Groundwater Quality Beneath Permeable Asphalt, Derek R. Angel

Master's Theses

This study examined the effects of winter deicing on groundwater quality beneath an 860-m² permeable asphalt parking lot at the University of Connecticut in Storrs, Connecticut. While the beneficial impacts of permeable asphalt on water quality and hydrology have been documented in the literature and include increases in groundwater recharge, reduced peak flows and reductions in metals and hydrocarbon contaminant concentrations in groundwater, chloride has not been observed to be filtered from percolate beneath permeable asphalt. The potential issues related to chloride contamination of groundwater include aquatic toxicity and heavy metals mobilization. Monitoring wells were installed up-gradient and down-gradient …