Digital Commons Network^™

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 …

Economic Impact Of The Williamson Act In San Luis Obispo County, Hayley Nicole Loehr

Master's Theses

The goal of this research was to analyze the economic impact of the Williamson Act and the agricultural industry in San Luis Obispo County, and to assess the changes in agriculture and the County’s economic structure if a significant proportion of Williamson Act contracts were not renewed. Williamson Act enrollment and agriculture data were analyzed on a zip code level using IMPLAN v. 3.0, an input-output modeling program.

The first round of analysis assessed the baseline economic impact of the agriculture industry in San Luis Obispo County. Then, four regions of the county were established based on Williamson Act enrollment …

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 …

A Resistance Based Structural Health Monitoring System For Composite Structure Applications, Dennis N. Boettcher

Master's Theses

This research effort explored the possibility of using interwoven conductive and nonconductive fibers in a composite laminate for structural health monitoring (SHM). Traditional SHM systems utilize fiber optics, piezoelectrics, or detect defects by nondestructive test methods by use of sonar graphs or x-rays. However, these approaches are often expensive, time consuming and complicated.

The primary objective of this research was to apply a resistance based method of structural health monitoring to a composite structure to determine structural integrity and presence of defects.

The conductive properties of fiber such as carbon, copper, or constantan - a copper-nickel alloy - can be …

Accelerating Ray Casting Using Culling Techniques To Optimize K-D Trees, Anh Viet Nguyen

Master's Theses

Ray tracing is a graphical technique that provides realistic simulation of light sources and complex lighting effects within three-dimensional scenes, but it is a time-consuming process that requires a tremendous amount of compute power. In order to reduce the number of calculations required to render an image, many different algorithms and techniques have been developed. One such development is the use of tree-like data structures to partition space for quick traversal when finding intersection points between rays and primitives. Even with this technique, ray-primitive intersection for large datasets is still the bottleneck for ray tracing.

This thesis proposes the use …

Determining The Trophic Role Of Gulf Menhaden (Brevoortia Patronus) Using Carbon And Nitrogen Stable Isotopes, Zachary Olsen

Master's Theses

Gulf menhaden (Brevoortia patronus) play multiple roles in the Gulf of Mexico coastal ecosystem as filter feeders and as an important food source for many recreationally and economically important finfish. Gulf menhaden also support a large commercial fishery, and little is known about the impact of fishing on the role of this species as a filter feeder in the food web. This study examines the spatial, temporal and ontogenetic dynamics of food selectivity and trophic role observed in Gulf menhaden. The most important dietary item for juvenile fish was found to be phytoplankton (75.7% dietary composition) while that of subadults …

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 …

Effects Of Hurricane Disturbance On The Stopover Ecology Of Intercontinental Landbird Migrants In Coastal Louisiana, Emily Johanna Lain

Master's Theses

Few studies have considered the impact of weather events on migratory birds during stopover, and essentially none on how hurricanes affect their stopover biology during spring passage. About two thirds of eastern North American forest breeding bird species migrate twice annually between temperate breeding areas and subtropical and tropical wintering grounds, and movement in relation to the Gulf of Mexico (GOM) is a conspicuous and important part of that migration system. During inclement weather or winds inconsistent with travel direction, migratory birds oft.en/a/lout and concentrate by the thousands in forest patches that occur along the northern coast of the GOM. …

Zifazah: A Scientific Visualization Language For Tensor Field Visualizations, Haipeng Cai

Master's Theses

This thesis presents the design and prototype implementation of a scientific visualization language called Zifazah for composing and exploring 3D visualizations of diffusion tensor magnetic resonance imaging (DT-MRI or DTI) data. Unlike existing tools allowing flexible customization of data visualizations that are programmer-oriented, Zifazah focuses on domain scientists as end users in order to enable them to freely compose visualizations of their scientific data set. Verbal descriptions of end users about how they would build and explore DTI visualizations are analyzed to collect syntax, semantics, and control structures of the language. Zifazah makes use of the initial set of lexical …

Improved Detection Methods For Selected Vibrio Species In The Marine Aquatic Environment, Kimberly Jordan Griffitt

Master's Theses

Vibrio vulnificus, Vibrio cholerae, and Vibrio parahaemolyticus are the three most commonly encountered human pathogens in the Vibrio genus. They are frequent agents of foodborne illness contracted from seafood. The work presented here focuses on three aspects of detection of these bacteria. First is a novel agar formulation designed to isolate and directly enumerate V. vulnificus from oyster tissue by using x-gal, a chromogenic analog to lactose, as a carbon source and agent of differential morphological colony growth. Second is a field study on the relative abundance of the three main pathogenic Vibrios following the opening of the …

Photo-Poetics: Photographic Narratives In The New Journalism, John David Hosemann Jr.

Master's Theses

Americans today have come to remember the unrest of the 1960s through the many shocking photographic images that emerged during that time. Images of assassinations, war, murders, and social upheaval have come to characterize this decade as particularly (perhaps perversely) photogenic. Further, these images have revealed the photographic medium as uniquely suited for confirming a violent reality that, at the time, seemed incomprehensible to an increasingly disillusioned public. In this discussion I seek to develop an understanding of photography as a theoretical process that can illuminate how we represent violent subject matter. In doing so, I apply these concepts to …

Panic Behind The Mask: The Spanish Influenza Epidemic Of 1918 In New Orleans, Sarah Theresa Savage

Master's Theses

As part of the most devastating influenza pandemic in modern history, the Spanish Influenza epidemic in New Orleans left the city emotionally and physically crippled as residents struggled to resume daily life after thousands succumbed to a bloody cough and painful death in October 1918. When New Orleans public health officials reacted to the explosion of Spanish Influenza cases on October 10, 1918, the virus had already traveled throughout the population. Unlike previous influenza outbreaks, the 1918 epidemic killed primarily young healthy adults, the backbones of the working force and families. In an attempt to quarantine the ill from the …

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 …

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, …

Synthesis Of Half-Loaded Nitroimidazole Indocyanine Green Dyes Attached To Carbon Nanotubes, Courtney L. Stanford

Master's Theses

Indocyanine green dye is the only FDA approved NIR fluorescent dye that can be used in humans. 2-Nitroimidazoles are very effective radiosensitizers, have low cytotoxicity, and target hypoxic tissue. By coupling the two together, hypoxic tumors can be targeted and imaged. Previous work has been done to couple 2-nitroimidazole to both sides of the indocyanine green dye. This work focuses on expanding that concept to couple 2-nitroimidazole to only one side of the dye, thus allowing for the other end to be available to couple to another compound, generating a half loaded 2-nitroimidazole indocyanine green dye. In theory, this half-loaded …

Dietary Protein Influences Paracellular Calcium Transport: Two Molecular Targets, Belinda M. Kotler

Master's Theses

The effect of dietary protein on bone health remains controversial. We have shown that increasing dietary protein increases calcium absorption in both humans and rats with no change in bone resorption. We used a rat model in which dietary protein increases intestinal calcium absorption and whole body calcium retention, to explore the molecular basis for this effect. Female Sprague-Dawley rats were fed a low (5%) or high (40%) protein diet for 7 days. On day 7, duodenal mucosa was harvested and total RNA isolated. Microarray analyses using these RNA samples identified 208 genes whose expression was at least 1.5 fold …

Diffusion Barriers Of The Lateral Ventricular System, Anitha Saravanakumar

Master's Theses

Adult neurogenesis in mammalian brain has become a well-accepted phenomenon. The neural stem cells in the sub ventricular zone (SVZ) along the lateral wall of the lateral ventricle, the largest germinal center of adult neurogenesis, are maintained by the neural stem cell niche. One prominent feature of the niche is its close proximity to the cerebral spinal fluid (CSF). The role of micromolecules (such as ions, water and gases) present in the CSF and diffusing through the lateral ventricular wall and how the stem cell micro-environment is maintained is poorly understood. The cytoarchitecture of the lateral ventricular wall with a …

Immediate Versus Delayed Loading Of Two Implants Supporting A Locator Retained Mandibular Overdenture. A Randomized Controlled Study., Sejal R. Thacker

Master's Theses

The aim of this study was to evaluate immediate versus delayed loading of two implants, six months post-surgery, supporting a locator retained mandibular overdenture. The objective was to evaluate implant bone remodelling using radiographic bone level changes (RBL) as the variable, from baseline to six months, between the test and the control groups. The secondary objectives included (1) evaluation of implant survival, (2) nature and frequency of surgical and prosthetic complications, and (3) correlation of implant length and insertion torque on RBL.

Eligible patients were randomized into test (immediate loading) and control group (delayed loading). Five patients were allocated to …

Tissue Engineering A Blood Vessel Mimic While Monitoring Contamination Through Sterility Assurance Testing, Navid Djassemi

Master's Theses

Tissue Engineering A Blood Vessel Mimic While Monitoring Contamination Through Sterility Assurance Testing

Navid Djassemi

Tissue engineering blood vessel mimics has been proposed as a method to analyze the endothelial cell response to intravascular devices that are used in today’s clinical settings for the treatment of cardiovascular disease. Thus, the development of in vitro blood vessel mimics (BVMs) in Cal Poly’s Tissue Engineering Lab has introduced the possibility of assessing the characteristics of cellular response to past, present, and future intravascular devices that aim at treating coronary artery disease.

This thesis aimed at improving the methods and procedures utilized in …

Development Of In Vitro Tissue Engineered Blood Vessel Mimics In Complex Geometries For Coronary Stent Testing, Robert Dalton Chavez

Master's Theses

Coronary heart disease is the leading cause of death in the United States and occurs when plaque occludes coronary arteries. Coronary stents, which may be used to treat coronary occlusions, are small metal tubes that are implanted in coronary arteries to restore blood flow. After stent implantation, endothelial cells grow over the stent so that blood contacts the endothelial cells instead of the stent surface; this event is known as re-endothelialization. Re-endothelialization prevents blood from clotting on the stent surface and is a good predictor of stent success. Blood vessel mimics (BVMs) are in vitro tissue engineered models of human …

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, …

The Effect Of Corticision On The Rate Of Orthodontic Tooth Movement In Rats, Hamed Vaziri

Master's Theses

Minimal treatment time is a primary goal for orthodontic therapy. Reducing treatment time decreases risk of caries, periodontal disease, root resorption, and increases patient satisfaction. Orthodontic tooth movement (OTM) is a result of bone resorption and apposition; factors influencing the rate at which these processes take place may affect OTM. Various attempts have been made to shorten treatment time. The regional acceleratory phenomenon (RAP) has been used to modify the balance between resorption and apposition of bone through selectively injuring the cortical plate of the alveolus to accelerate tooth movement. This approach is limited due to the need of flap …

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 …

Like Laws And Sausages: The Tale Of A Mere Portion Of The Process To Develop The South Broad Street Corridor Plan, Amy R. Lopez

Master's Theses

The processes to develop community plans share certain standard activities and stages while remaining distinctive and without pre-scripted procedures. This study documents the process that yielded the South Broad Street Corridor Plan June 2012 draft. The objective is to present the decision-making processes and their connections to the final plan document along with the plan document itself.

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 …

Evaluation Of Textural Properties Of Cooked Beef Batters, Lee M. Christensen

Master's Theses

In the meat science industry the primary method used to determine the binding capabilities of a raw material is to reference the binding index created by Carpenter and Saffle (1964). This index is primarily based on the emulsification capabilities of meats and does not consider texture. As texture is one of the principal factors in determining acceptability of foods (Bourne, 1978), a testing method that captures textural attributes of raw materials is essential. This work was developed to capture raw material texture and cooking loss in a relatively quick manner.

Textural properties of cooked beef batters using two different salt …

Viscoelastic Anisotropic Finite Element Mixture Model Of Articular Cartilage Using Viscoelastic Collagen Fibers And Validation With Stress Relaxation Data, Matthew Alexander Griebel

Master's Theses

Experimental results show that collagen fibers exhibit stress relaxation under tension and a highly anisotropic distribution. To further develop the earlier model of Stender [1], the collagen constituent was updated to reflect its intrinsic viscoelasticity and anisotropic distribution, and integrated with an existing mixture model with glycosaminoglycans and ground substance matrix. A two-term Prony series expansion of the quasi-linear viscoelastic model was chosen to model the viscoelastic properties of the collagen fibers. Material parameters were determined by using the simplex method to minimize the sum of squared errors between model results and experimental stress relaxation data of tissue in tension. …

Becoming Cittaslow: A City's Journey To Becoming A Cittaslow Member, Megan Alexis Elovich

Master's Theses

The project will explore Cittaslow as an alternative to traditional urban development. Sprawl and consumption of non-local resources are discouraged with Cittaslow and preservation of culture and history become the tangible benchmarks of the community. It will explore the history of Cittaslow as a movement and an organization; as well as its influences on existing member cities and the criteria used to distinguish them from others. The City of San Luis Obispo is used as a case study to determine whether existing conditions measure up to Cittaslow criteria.

3d Electromagnetic Simulation Tool Exposure For Undergraduate Electrical Engineers: Incorporation Into An Analog Filters Course, Bobby B. Pheng

Master's Theses

With the growth of wireless communications, comes the need for engineers knowledgeable in 3D electromagnetic (EM) simulation of high-frequency circuits. To give electrical engineering students a better understanding of the behavior of electromagnetic fields, experiments including the use of 3D EM simulation software were proposed. Most students get lost in differential equations, curls, and divergences; this thesis aims to remedy that by exposing them to 3D EM simulation, which may motivate them toward further study in electromagnetics. Also, experience using EMPro is very beneficial for future RF/microwave/antenna engineers, as use of 3D EM simulation is becoming a requirement for this …