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The New Bicycle Model: Introducing Software Considerations Early Into The Systems Engineering Design And Integration Process, Nathaniel Dinglasan Angat

Master's Theses

Lockheed Martin Space Systems Company, Sunnyvale, California is in the business of designing and engineering satellites for commercial and government customers. This task is by no means a trivial endeavor but Lockheed MartinSunnyvale has many decades of experience in Systems Engineering. Training in systems engineering is a long process whose training tools must be kept up-to-date and appropriate as new advances in technology evolve along-side with the processes that develop these ever-evolving solutions. For many years new systems engineers have been introduced to the Bicycle Model as a paradigm for designing and developing complex systems that are composed of diverse …

The Effects Of Bolt Pretension, In-Plane Eccentricity, And Friction On The Ductility Of Block Shear Connections, Kevin M. Zmetra

Master's Theses

Block shear is a complex failure mechanism in bolted and welded steel components such as gusset plates, webs of coped beams, angles and tees. It presumes a combination of tension rupture and shear yield. Multiple variables affect the block shear capacity and ductility of a connection. This study investigates the effects of bolt pretension, connection eccentricity and friction force transfer through a series of destructive experiments followed by refined finite element simulation. Clamping forces create a complex triaxial stress field compounded by the stress concentration at the bolt holes. In-plane load eccentricity with respect to the centerline of the connection …

Identifying Barriers To Adherence For Hiv+ Patients Placed On Renal Dosing, Richard S. Colon Jr

Master's Theses

No abstract provided.

Biochemical Evaluation Of Srh Analogs As Potential Luxs Inhibitors, Richa Gupta

Master's Theses

Quorum sensing in bacteria is a process of cell-to-cell communication facilitated by small molecules called autoinducers. Interspecies quorum sensing is facilitated by the autoinducer AI-2. The enzyme LuxS catalyzes the formation of AI-2 from S-ribosyl homocysteine (SRH) in a wide variety of bacterial species. Inhibition of LuxS would therefore inhibit interspecies quorum sensing. The goal of this project is to establish biochemical assays for the evaluation of small molecules as potential LuxS inhibitors. The first assay is a conventional colorimetric assay that utilizes Ellman’s reagent to quantify the homocysteine byproduct of DPD production by LuxS. For this assay purified …

Active Storage And Ssd Caching In An Object Storage Environment, Michael T. Runde

Master's Theses

The advancing performance and lowering costs required to implement additional processing power on system peripherals such as disk drives are increasingly allowing additional computing ability to be located directly on individual drives. Active Storage attempts to take advantage of this excess by moving some computationally intensive applications directly to the disk drives. This can remove the bottlenecks seen through interconnects between the drives and the CPU of an initiating system as well as remove the need for systems to handle these applications.

The contributions of this thesis are in two areas. The first is the development of a framework designed …

An Analysis Of Productivity Gaps Among Smallholder Groundnut Farmers In Uganda And Kenya, Cresensia Asekenye

Master's Theses

No abstract provided.

Winter Drawdown Effects On Swim-Up Date And Growth Rate Of Age-0 Fishes In Connecticut, Christopher P. Mcdowell

Master's Theses

Winter drawdown is a common lake management tool, which alters lake ecosystems. This study was undertaken to determine if winter drawdown history and varying winter drawdown intensities influenced swim-up dates and mean daily growth rates (MDGR) of age-0 yellow perch , largemouth bass and bluegill in five small eastern Connecticut impoundments, two of which had extensive drawdown histories, two sporadic drawdowns, and the final having never been drawdown. Three different winter drawdown treatments (none, shallow, deep) were implemented. Daily ring counts on otoliths were used to determine relative swim-up dates and MDGR from a subsample of fish each year. Covariates …

In Vivo And In Vitro Digestibility Of A Complete Pelleted Feed In Horses, Cassandra Renee Sweeney

Master's Theses

ABSTRACT

COMPLETION OF AN IN VIVO DIGESTIBILITY TRIAL IN HORSES AND IN VITRO DIGESTIBILITY ASSAY DEVELOPMENT

Cassandra Renee Sweeney

In vivo analysis of equine feed digestibility has been the gold standard since the late 1800's, although it can be time consuming, costly, and labor intensive. In vitro digestibility analysis may be more economical and beneficial to both feed manufacturers and consumers. The availability of accurate in vivo data is crucial for critical evaluation and validation of any potential in vitro method (Coles et al., 2005). Ten adult American quarter horse geldings were used in the in vivo digestibility evaluation of …

Touchspice Vs. Reactive-Spice: A Human-Computer Interaction Perspective, Joshua Martin O'Hara

Master's Theses

Traditional SPICE simulation tools and applications of circuit theory lack real-time interaction and feedback. The goal of this thesis was to create an interactive physical environment to allow the manipulation and simulation of discrete electrical components in near-real-time while optimizing and streamlining the human-computer interaction (HCI) elements to make the user experience as positive and transparent as possible. This type of HCI and near-real-time simulation feedback would allow for the instant realization of how the parameters of each discrete component or hardware module affect the overall simulation and response of the circuit.

The scope of this thesis is to research, …

Control System Development For Small Uav Gimbal, Nicholas J. Brake

Master's Theses

The design process of unmanned ISR systems has typically driven in the direction of increasing system mass to increase stabilization performance and imagery quality. However, through the use of new sensor and processor technology high performance stabilization feedback is being made available for control on new small and low mass stabilized platforms that can be placed on small UAVs. This project develops and implements a LOS stabilization controller design, typically seen on larger gimbals, onto a new small stabilized gimbal, the Tigereye, and demonstrates the application on several small UAV aircraft. The Tigereye gimbal is a new 2lb, 2-axis, gimbal …

Neural Networks Performance And Structure Optimization Using Genetic Algorithms, Ariel Kopel

Master's Theses

Artificial Neural networks have found many applications in various fields such as function approximation, time-series prediction, and adaptive control. The performance of a neural network depends on many factors, including the network structure, the selection of activation functions, the learning rate of the training algorithm, and initial synaptic weight values, etc.

Genetic algorithms are inspired by Charles Darwin’s theory of natural selection (“survival of the fittest”). They are heuristic search techniques that are based on aspects of natural evolution, such as inheritance, mutation, selection, and crossover.

This research utilizes a genetic algorithm to optimize multi-layer feedforward neural network performance and …

The Modern Sex Doll-Owner: A Descriptive Analysis, Sarah Hatheway Valverde

Master's Theses

Over the last fifteen years, the sex doll industry has grown from producing inexpensive novelty items to creating a multimillion-dollar global industry featuring high- quality, realistic love dolls. These dolls are designed and advertised for sexual stimulation, companionship, artistic representations of human fantasy, and other creative pursuits, such as photography. Made of flesh-like silicone, modern sex dolls sell from $3,500-$10,000.

The use of human simulacra for sexual stimulation is an enduring practice. However, the psychological community has said little on the subject. Early sexologists briefly reference Agalmatophilia or Statuphilia, a rare sexual attachment to statues. Today, the sex doll …

Effects Of Compost, Legume Cover Cropping And Vermicompost Extract Foliar Applications On Nutrition And Yield Of Washington Navel Oranges, William Payton Carling

Master's Theses

ABSTRACT

Effects of Compost, Legume Cover Cropping and Vermicompost Extract Foliar Applications on Nutrition and Yield of Washington Navel Oranges

William Payton Carling

An experiment was conducted to test the effects of four treatments on Washington navel orange (Citrus sinensis) trees in regards to nutrient content of the leaves and fruit, soil nutrient content and properties, and fruit yield. The four treatments included: compost (C) and vermicompost extract foliar (VEF) applications, legume cover cropping (LCC) and VEF applications, VEF applications, and a control. The treatments were implemented from February 2010 to April 2011 and sampling occurred in May …

A Cold War Episode: Detente And Us Relations With Pakistan During The 1971 South Asia Crisis, Ralph A. Becker

Master's Theses

The Cold War defined a state of conflict between the U.S., China, and the Soviet Union during the nuclear age that followed World War II. During the Cold War the United States practiced a foreign policy that was episodic in nature as the great nations recruited the developing countries of the Third World to carry on their ideological struggles. This policy meant that the U.S. would aggressively intervene during periods of war in developing countries in order to prevent the spread of communism. Yet, after the episode ended, the U.S. would quickly vacate the region and move on to other …

Bacterioplankton Production In The Western Mississippi Sound And The Role Of Photosynthetic Extracellular Release As A Driver Of Bacterial Production, Amy Michele Glover

Master's Theses

Bacterioplankton growth and metabolic activities are a vital component in structuring marine and estuarine ecosystems. In this study, bacterial production (BP) was investigated at two separate stations in the western Mississippi Sound (MS). One was an inshore site outside of the Bay of St. Louis and the other site was located in the transition zone (offshore) between the MS and Mississippi Bight, just south of Cat Island. Bacterial production (BP) was analyzed using the addition of ¹⁴C leucine to natural water samples. In addition, samples were augmented with algal exudates in order to investigate BP based on uptake of …

Aloe Striata Plant Defense Compounds Produced In Response To Jasmonic Acid, Salicylic Acid, And Eriophyid Mite Salivary Extract Elicitor Compounds, Fritz Light

Master's Theses

Aloe mites are herbivores of the genus Aloe (ALOACEAE) and are associated with hyperplastic growth in various aloe species, but the biochemistry of this interaction is poorly understood. In an effort to characterize plant defense responses to herbivory in the genus Aloe, a salivary extract was isolated from aloe mites (Aceria aloinis Keifer) and its bioactivity was tested using a hypocotyl elongation assay. Subsequently, Aloe striata plants were treated with jasmonic acid (JA), salicylic acid (SA), and the mite salivary extract. Using water and methanol, compounds of different polarity were extracted from aloe tissues that had been frozen …

A Comparative Analysis Of Low Cost Localization Methods For A Mario Kart Game Application, Anuranga Sajith Gunaratne

Master's Theses

In vehicle navigation systems, it is important to have accurate estimates of vehicle positioning. The process of determining positioning is called localization. There are two methods for localization, absolute positioning and relative positioning [1]. An absolute positioning system, such as Global Positioning System (GPS), determines the localization by using external distance and heading measures. Relative localization determines the position of an object based on its previously known location and through sensors that determine speed and heading. Examples of relative positioning sensors include wheel encoders, inertial sensors and accelerometers.

The objective of this thesis is to analyze different methods to perform …

Opportunistic Random Media Access In Wlans, Chong Tang

Master's Theses

This thesis proposes a new medium access protocol for IEEE 802.11 wireless local area networks, which is called opp01tunistic medium access. The protocol changes the media access opportunities of nodes by adjusting the contention window dynamically according to the different bit rates. Thereby, the protocol can reduce collision and improve throughput significantly. The n·aditional IEEE 802.11 standards access channel with binary exponential back-off algorithm and all nodes choose the back-off interval from the same initial range. The new protocol in this thesis divides nodes as well as contention windows in proportion to data rate. It offers three methods to group …

Designing And Developing An Alternative Implementation Of The Digital Bathymetric Database, Variable Resolution (Dbdb-V), Donald Lester Brandon Jr.

Master's Theses

This documentation describes a project to design and develop an alternative implementation of the Digital Bathymetric Database Variable Resolution (DBDB-V) that will allow efficient ingestion into Geospatial Information System (GIS). DBDB-V is a well-known storage facility for wide-reaching bathymetry. It is created, maintained, and extensively used by the U.S. Navy, and it is seen in many applications within the public sector. Environmental Systems Research Institute (ESRI) develops a popular suite of GIS applications called ArcGIS Desktop that is used worldwide and offered to U.S. Navy programs though the Commercial Joint Mapping Toolkit (CJMTK). …

"We've Got Something More To Prove Here": Racial-Ethnic And Social Class Identities And The Challenges Facing Latina/O College Students, Gretchen Marin

Master's Theses

Latinas/os are one of the fastest growing minority groups in the United States. In fact, the United States Census Bureau projects that by the year 2050, the numbers of Hispanics will more than double, increasing from the current figure of 50.5 million to 102.6 million. Despite such rapid population growth, the numbers of Latinas/os with at least a Bachelor’s degree remain low. In this study, I explore the intersection of racial-ethnic and social class identities in relation to academic identities. Specifically, I examine the challenges facing Latina/o college students of various socioeconomic backgrounds as they negotiate a predominantly White, middle-class …

Repetitive And Stereotyped Behaviors From Age 2 To Age 4: A Look At The Development Of High- And Low-Level Repetitive Behaviors In Children With Autism Spectrum Disorders, Kelley Knoch

Master's Theses

Restricted and repetitive behaviors (RRBs) are core features in autism spectrum disorders (ASD). Previous literature has subdivided RRBs into low and high levels. Low-level behavior is characterized by a repetition of movement, such as stereotyped movements, whereas high-level behavior includes insistence on sameness and rigid adherence to a routine. There is conflicting evidence frequency and severity of RRBs in early development in children with ASD. In the current study, we examined developmental differences in the frequency and severity of RRBs in children with ASD (n = 109) compared to children with developmental delays (DD) (n= 34). Participants were evaluated at …

A Qualitative Study Of Barriers To Dental Care Among Older Minority Adults Residing In Lower Income Communities, Demetress Davis

Master's Theses

ABSTRACT: The purpose of this study was to explore factors that presented barriers to the use of dental care among low-income minority older adults. Participants were recruited from low-income senior housing in Hartford, CT. In-depth semi-structured interviews were conducted to obtain data on demographics, oral health status, oral health knowledge and factors that affected use of dental care including finances, perceived oral symptoms, cultural factors, and beliefs about dental care. Interviews were conducted with 17 participants. The major perceived barriers were ability to pay for care, transportation and fear/mistrust of the dentist. Participants may have had poor oral health as …

Stratigraphy Of Quaternary Dunes By Sand Mineralogy And Pedogenic Features, Los Osos, California, Lyssa A. Cousineau

Master's Theses

The goal of this study was to assess mineralogy and pedogenic features of sand dunes in a stratigraphic sequence. The purpose was to determine whether these features significantly differ to reflect age differences with depth within the sequence. This study was conducted in Montaña de Oro State Park, located on the central Californian coast eighteen kilometers northwest of San Luis Obispo in San Luis Obispo County.

Samples were collected from the vertical exposure of one dune face by stratified random sampling at 1.0-m vertical intervals. Particle size distribution was determined through particle-size analysis by hydrometer and sieve. Electrical conductivity and …

Characterization Of Tight Junction Formation In An In-Vitro Model Of The Blood-Brain Barrier, Michael Robert Machado

Master's Theses

Active and passive transport of substances between the microcirculation in the brain and the central nervous system is regulated by the Blood-Brain Barrier (BBB). This barrier allows for chronic and acute modulation of the CNS microenvironment, and protects the brain from potentially noxious compounds carried in the circulatory system. In-vitro modeling of the BBB has become the target of much research over the past decade, as there are many unanswered questions regarding modulations in the permeability of this barrier. Additionally, the development of a practical and inexpensive model of the BBB would facilitate a much more efficient drug development process. …

Development And Characterization Of An In-House Custom Bioreactor For The Cultivation Of A Tissue Engineered Blood-Brain Barrier, Amin Hadi Mirzaaghaeian

Master's Theses

The development of treatments for neurological disorders such as Alzheimer’s and Parkinson’s disease begins by understanding what these diseases affect and the consequences of further manifestation. One particular region where these diseases can produce substantial problems is the blood-brain barrier (BBB). The BBB is the selective diffusion barrier between the circulating blood and the brain. The barrier’s main function is to maintain CNS homeostasis and protect the brain from the extracellular environment. The progression of BBB research has advanced to the point where many have modeled the BBB in vitro with aims of further characterizing and testing the barrier. Particularly, …

Analysis Of Periapical Biopsies Submitted For Histopathological Evaluation: A Retrospective Study, Abdullah I. Alqaied

Master's Theses

Apical periodontitis is the most common pathological process in the periapical region. Disciplined clinical and radiographic evaluations and appropriate diagnostic tests can detect lesions related to apical periodontitis. Aside from this, lesions mimicking pulp-related pathology but unrelated to pulpal infection and necrosis are occasionally discovered in the periapical region. The objective of this study was two-fold: (1) to determine the prevalence of diverse periapically located pathological entities, and (2) to apply that information to evaluate the rationale for routine submission of surgically obtained tissue for histological examination and diagnosis. Methods: A 5-year retrospective analysis of pathology reports from the UCONN …

City Of Watsonville Local Hazard Mitigation Plan, Emily Margaret Lipoma

Master's Theses

The City of Watsonville is vulnerable to a number of natural and man-made hazards. This project analyzed this risk and vulnerabilities to critical facilities within the city, and made recommendations of mitigation strategies and implementation methods to address this risk. Analysis and data collection was conducted in coordination with the City of Watsonville Fire Department and the resulting product will be given to the City for their use and potential adoption. The documents within this Local Hazard Mitigation Plan was developed to the standards and specifications developed by the State of California and Federal Emergency Management Agency for a Local …

Reliable Software Updates For On-Orbit Cubesat Satellites, Sean Fitzsimmons

Master's Theses

CubeSat satellites have redefined the standard solution for conducting missions in space due to their unique form factor and cost. The harsh environment of space necessitates examining features that improve satellite robustness and ultimately extend lifetime, which is typical and vital for mission success. The CubeSat development team at Cal Poly, PolySat, has recently redefined its standard avionics platform to support more complex mission capabilities with this robustness in mind. A significant addition was the integration of the Linux operating system, which provides the flexibility to develop much more elaborate protection mechanisms within software, such as support for remote on-orbit …

Network Channel Visualizing Simulator: A Real-Time, 3d, Interactive Network Simulation Platform, Sean Michael Forsberg

Master's Theses

With a focus of always being connected, it's become typical for laptops and mobile devices to include multiple wireless network devices. Though the additional network devices have created mobility and versatility of how a user is connected, it is common for only one to be active at any given time. While likely that new mesh protocols will help maximize connectivity and power consumption by utilizing lower-power multi-hop techniques, it is still difficult to visualize these protocols due to the complexity created by each node's simple choices. Further challenges are presented by the variety of network devices which share frequency ranges …

Mapping Plant Biodiversity Hotspots At The County Scale: A New Tool For Establishing Resource Conservation Strategies, Kristie Haydu

Master's Theses

Myers first identified the world’s 25 biodiversity hotspots and pioneered innovative ideas about the usefulness of biodiversity models for establishing long-term resource conservation strategies at global scales. Since Myers, most of the subsequent studies using hotspot science for biodiversity modeling have used large spatial scales like countries, provinces or states, and other biogeoraphic regions. The California Floristic Province continues to be one of the recognized global biodiversity hotspots. Our study site, San Luis Obispo County is within this hotspot and we created a map of plant biodiversity hotspots at the county scale using GIS technology. We wanted to determine the …