Digital Commons Network^™

Cloud Microphysical Properties Based On Airborne In Situ Observations And Evaluation Of A Weather Forecasting Model And A Global Climate Model, John D'Alessandro

Master's Theses

Global cloud coverage has a substantial impact on local and global radiative budgets. It is necessary to correctly represent clouds in numerical weather models to improve both weather and climate predictions. This study evaluates in situ airborne observations of cloud microphysical properties and compares results with the Weather Research and Forecasting model (WRF) and Community Atmosphere Model version 5 (CAM5). Dynamical conditions producing supersaturated conditions with respect to ice at high altitudes in regions diagnosed by convective activity are explored using observations taken from the Deep Convective Clouds and Chemistry (DC3) campaign, and results are compared with simulated data from …

Biochemical Study Of A Chymotrypsin-Like Serine Protease, Aachymo, From The Female Aedes Aegypti Mosquito, Olive Escalicas Burata

Master's Theses

The Aedes aegypti female mosquito is a dominant vector of four bloodborne viruses: dengue, chikungunya, yellow fever, and Zika. Defenses against viral infection are reliant on human competence to limit interactions with the vector or through abatement using

methods that are either too expensive or ecologically invasive upon other species. An alternative vector control approach focuses specifically on blood meal protein digestion, which is a required process to fuel the gonotrophic cycle. Reduction of eggs laid can be

observed by inhibiting midgut serine proteases that are afterward released in the midgut in the presence of a blood meal. Trypsin-like serine …

Associative Memory Performance Following Periods Of Wakeful Rest And Technological Distraction, Chalise Carlson

Master's Theses

We often spend breaks in our day by engaging with technological devices. However, literature across several species indicates that resting quietly without engaging in other activities, termed wakeful rest, can be beneficial to memory consolidation, a period following encoding which serves to stabilize memories. Prior research demonstrates that wakeful rest benefits memory for single items. However, the effects of wakeful rest on associative memory, (i.e. memory for associations between stimuli), remain unclear. To elucidate the effects of wakeful rest on associative memory, a study was designed to examine differences in associative memory performance following periods of wakeful rest and game …

Diets And Stable Isotope Signatures Of Yellowtail Rockfish (Sebastes Flavidus) In Central California, Jennifer Chiu

Master's Theses

Studies of fish diets can improve the understanding of trophic distributions and the predatory role of a species in an ecosystem. Identifying the spatial and temporal variability in the diets of fishes can provide useful information for stock assessments and management. Yellowtail Rockfish (Sebastes flavidus) are a commercially and recreationally important fishery species, and abundant along the central California coast, yet the most recent studies of diets occurred over 20 years ago in Oregon and Washington. To provide current information from California, I examined the food habits of Yellowtail Rockfish collected near Cordell Bank, the Farallon Islands, and Half Moon …

Modeling And Simulation Of Vehicle Performance In A Uav Swarm Using Horizon Simulation Framework, Adam J. Frye

Master's Theses

A UAV swarm is simulated using Horizon Simulation Framework. The asset utilized for the swarm agent is a simplified model of the MQ-1 Predator, a large fixed-wing aircraft. The simulated swarm utilizes a decentralized cooperative control approach to command the assets through the use of digital pheromones and a pheromone map. Each vehicle operates at steady-state flight conditions of 36 m/s with an altitude of 1,800 m, and utilize an LQR set-point controller to maneuver through the pheromone map. All pheromone and aircraft related models are written in Python to expand the HSF scripting capability and include airborne scenarios. The …

Auditory Brainstem Response And Language In Typically Developing Children And Children With Autism Spectrum Disorder, Lisa Tecoulesco

Master's Theses

Syntactic, semantic, and phonological knowledge are vital aspects of macro level language ability. Prior research has focused on environmental or cortical sources of individual differences in these areas. Subcortical contributions of the auditory brainstem have also been found to contribute to language ability in both typically developing (TD) populations and children with autism spectrum disorder (ASD). This study investigates whether one aspect of auditory brainstem responses (ABRs), response stability, a metric of the variability of instance to instance neural encoding of sound, can predict syntactic, semantic, and phonological performance in TD and ASD school-aged children. This study further investigates the …

In Vitro Growth Of Osteoblasts On Poly Lactic-Co-Glycolic Acid Scaffolds Created Via Gas Foaming, Matthew James Thomas

Master's Theses

This study analyzed the feasibility of using gas foaming to create Poly Lactic-co-Glycolic Acid (PLGA) scaffolds for use as a substrate in bone tissue engineering and set out to determine whether the presence of osteoblasts on these scaffolds enhanced their material stiffness. The process of bone formation involves osteoblasts depositing extracellular matrix and calcifying this matrix with calcium phosphate crystals (Hasegawa et al., 2017) and pits between 30-40μm in diameter on tissue engineering scaffold surfaces have been shown to best promote osteogenic activity in the presence of bone-forming cells (Halai et al., 2014).The scaffolds were determined to contain pits within …

Effect Of Storage Period And Treatment On The Composition And Digestibility Of Olive Pomace In Cattle, Alexis Cecilia Ulloa

Master's Theses

Utilizing local by-products can serve to significantly reduce the current feed costs for ruminant producers. The objective of this study is (1) to evaluate the effects of chemical and bacterial inoculants in combination with ensiling, on the nutritional value and ensiling compatibility of olive pomace (OP) and (2) to identify the most biologically favorable treatment and ensiling day of OP for feeding to cattle. Freshly centrifuged OP (Olivas de Oro Olive Company, Creston, CA) was treated with one of four treatments: (1) no additives (control; CONT); (2) urea applied at 5% of DM (UREA; Agrium U.S. Inc, Loveland, CO); (3) …

Women With A Cause: Art, Representation, And Feminist Progress In Eighteenth-Century France, Darby Marie Leahy

Master's Theses

Throughout the eighteenth century the Age of Enlightenment transformed public discourse across Western Europe. In France, the salons of Paris became the primary institutions of Enlightenment thought. Hosted by women, the salons possessed a unique atmosphere in which men and women were regarded as intellectual equals. My thesis focuses on the role the female hostesses, salonnières, had in initiating French movements for gender equality that continued with great momentum throughout the French Revolution. By using popular artwork, literature, and memoirs I show how the efforts of French women to achieve gender equality helped give early rise to feminism.

An Assessment Of The Greatest Impacts On Distribution Uniformity For Drip And Micro Irrigation, Brooke Ashley Worden

Master's Theses

Using the Cal Poly Irrigation Training and Research Centers (ITRC) drip/micro evaluation program, global, or system, DU_lq is computed by combining the component DU_lq values of: pressure variation, uneven spacing between emitters, unequal drainage and “other” causes. “Other” causes include plugging, wear and manufacturing coefficient. The program also computes what percentage of the non-uniformity is due to each component. Burt (2004) showed that over 95% of the non-uniformity is due to “Other” causes and pressure differences. This thesis looks at what specifically in those components is driving the non-uniformity by analyzing various equipment and field practices and their …

The Impact Of Cleft Lip And Palate Repair Surgery On Cognitive And Academic Outcomes For Teens In India, R Jeremiah Maller

Master's Theses

India has a backlog of nearly one million patients in need of cleft lip and palate repair. Unrepaired cleft results in social stigma and diminished health, psychological wellbeing, and academic functioning. Cleft repair surgery has the potential to restore functioning in these domains. However, the magnitude of the social, educational, and economic impact of cleft repair surgery has not been evaluated using statistically rigorous methods. An estimation of the academic and educational impact of cleft repair has implications for the appropriate allocation of public health resources. We analyze original data gathered from teenagers in West Bengal, India using the difference-in-differences …

Facilitating Effective Online Discourse: Investigating Factors Influencing Students’ Cognitive Presence In Online Learning, Xinran Zhu

Master's Theses

The purpose of this study was to examine the relationship among social presence, cognitive presence and teaching presence in online learning within a Community of Inquiry (CoI) Framework (Garrison, Anderson, & Archer, 2000). In addition, the study investigated the impact of individual’s motivational factors on the relationship among the presences. An online survey testing learner’s perceived social presence, teaching presence, cognitive presence, situational interest and online technology self-efficacy was distributed to students who were taking online courses. A follow-up interview process was conducted in order to further interpret the quantitative data. The findings show that within the CoI framework, social …

Improving Diet & Physical Activity Behaviors Through Tailored Mhealth Messages: Application To Childhood Obesity Prevention In A Pediatric Emergency Department, Samantha Oldman

Master's Theses

No abstract provided.

Reduced Carbon Storage At Intermediate Depths In The Southwest Atlantic During Hs1: Evidence For A Weaker Southern Ocean Biological Pump, Matthew Lacerra

Master's Theses

No abstract provided.

Epigenetic Profiling Of Active Enhancers In Mouse Retinal Ganglion Cells, Jian Xing

Master's Theses

Retinal ganglion cells (RGCs) are projection neurons of the eye, which process and pass visual information collected in the eyes to the brain. However, epigenetic regulation of RGC fate specification remains poorly understood, in large part due to the technical challenges associated with purifying RGCs, which comprise only 1% of all retinal cells, and performing ChIP-seq profiling on a small number of cells. To overcome these limitations, we have purified RGCs from multiple mice by immunoppanning for Thy1, a surface marker on RGCs, and analyzed pulled chromatin by ChIP-seq for histone 3 acetylated at K27 (H3K27ac), which is an epigenetic …

Automation And Interpersonal Trust: The Sociotechnical Implications Of Unreliable Automation, Lauren Gannon

Master's Theses

No abstract provided.

The Importance Of Normative Civility Expectations For The Employee Experience: A Time-Lagged Analysis, Taylor Barr

Master's Theses

Previous research regarding the influence of normative workplace civility expectations on psychological health outcomes has often been cross-sectional and analyzed at only an individual-level. Furthermore, there is little knowledge of how these normative expectations may act to reduce the impact of experienced incivility. This study extends the research by conducting a daily diary study that examines longitudinal psychological health outcomes of experienced incivility using a multi-level framework. The additional focus of the study involves identifying the separate influence of supervisor civility expectations vs. workgroup civility expectations, which we test as both direct-effect predictors of daily experienced incivility. We also test …

Experimental And Computational Studies On The Reinforcement Effect Of Smooth Cord Grass (Spartina Alterniflora) On Erosion In Louisiana Coastal Marsh Creation Project, Sujan Baral

Master's Theses

Louisiana coastal saltmarshes are disappearing at an exponential rate. Even though several researches indicate that vegetation on coastal marshes protect the coast from erosion by providing soil reinforcement, wave buffering, sediment trapping and overall hydrologic regime control, the complex nature of coastal erosion process makes it too difficult to quantify the erosion resistance provided by vegetation. This research is focused on the study of soil binding ability provided by smooth cord grass, Spartina alterniflora, flourishing in dredged soil of Sabine Refuge Marsh Creation Project (CS-28) in Louisiana.

Field vane shear test was conducted to obtain the in-situ un-drained shear strength …

Developing An Assay To Quantify Antigen-Specific Igy In A Long-Lived Seabird, Anna Louise Mccarter

Master's Theses

To maximize parental fitness, life history theory predicts that short-lived species will prioritize reproductive efforts over self-maintenance functions. The opposite is predicted for long-lived species, which ought to invest heavily in immune defenses, particularly those of the acquired immune system. Yet, most of our current understanding of immune system function has been from investigations of short-lived model species. Little is known about the induction and maintenance of immunological memory in wild species, and in particular, long-lived, wild species. This is due in part to limited availability of species-specific secondary antibodies for use in serological studies of non-model species. Moreover, commercially …

Plant And Soil Carbon Responses To Invasive Typha Management In Great Lakes Coastal Wetlands, Olivia Johnson

Master's Theses

We quantified how control of a ubiquitous Great Lakes region invasive (Typha × glauca) shifts plant-mediated C cycling and belowground properties and processes. Two field experiments implemented large scale treatment plots (~1-ha to 3-ha) of harvesting (i.e., cut above water surface, removed biomass), crushing (i.e., ran over biomass), and creating connectivity channels (i.e., cut at the soil surface, created open-water within Typha-dominated stands). In one experiment, we observed immediate C release via gas flux and aqueous C; harvesting and crushing caused net emission of carbon dioxide (CO₂)_, and crush increased dissolved organic carbon in …

Orthoquery: A Tripal Database Module To Assess And Visualize Gene Family Evolution, Sumaira Zaman

Master's Theses

No abstract provided.

Comparison Of Approaches To Characterize Flow Conditions In Bedrock Wells, Stephanie Phillips

Master's Theses

Evaluating vertical flow in bedrock wells is important for understanding aquifer hydraulic parameters, and borehole flowmeter methods are critical for analyzing flow in fractured-rock aquifers. Single borehole logging is used to identify active hydraulic zones under ambient and pumping conditions, and crosshole flowmeter logging is used to identify hydraulic connections between boreholes. To identify potential zones of interest for flowmeter logging in fractured rock, first a series of conventional borehole logs are collected. Then, locations for flowmeter logging are selected and data are collected under ambient and stressed conditions to distinguish fracture flow zones. Because flowmeters are limited by their …

An Improved Probabilistic Simulation Framework For Gene Family Evolution, Soumya Kundu

Master's Theses

Gene and sub-gene family evolution is usually represented in a framework where domain trees evolve inside one or more gene trees, each of which evolves inside a species tree. The Duplication-Transfer-Loss (DTL) reconciliation and the Domain-Gene-Species (DGS) reconciliation algorithms allow us to infer the evolutionary histories of a given set of species, genes, and protein domains. However, in the absence of biological data regarding the true evolutionary histories of these species, genes, and domains, we must rely on simulated data to validate the accuracy of these methods. Although numerous probabilistic simulation frameworks exist for gene family evolution, none of them …

Iris Biometric Identification Using Artificial Neural Networks, Kevin Joseph Haskett

Master's Theses

A biometric method is a more secure way of personal identification than passwords. This thesis examines the iris as a personal identifier with the use of neural networks as the classifier. A comparison of different feature extraction methods that include the Fourier transform, discrete cosine transform, the eigen analysis method, and the wavelet transform, is performed. The robustness of each method, with respect to distortion and noise, is also studied.

Inverse Dynamic Analysis Of Acl Reconstructed Knee Joint Biomechanics During Gait And Cycling Using Opensim, Megan V. Pottinger

Master's Theses

ACL (anterior cruciate ligament) injuries of the knee joint alter biomechanics and may cause abnormal loading conditions that place patients at a higher risk of developing osteoarthritis (OA). There are multiple types of ACL reconstruction (ACLR), but all types aim to restore anterior tibial translation and internal tibial rotation following surgery. Analyzing knee joint contact loads provide insight into the loading conditions following ACLR that may contribute to the long-term development of OA. Ten ACLR subjects, who underwent the same reconstruction, performed gait and cycling experiments while kinematic and kinetic data were collected. Inverse dynamic analyses were performed on processed …

The Roles Of Tid1, Ndj1, And Spo16 In Distributive Segregation During Saccharomyces Cerevisiae Meiosis, Ethan Atticus Shaw

Master's Theses

Meiosis is a specialized form of cell division in sexually reproducing eukaryotes. Crossovers are physical connections formed between homologous chromosomes during meiosis; these connections help ensure normal segregation of homologous chromosomes at meiosis I. However, the yeast Saccharomyces cerevisiae and other eukaryotes can still segregate homologs properly even in the absence of some crossovers. This is due to a backup mechanism known as distributive segregation, which correctly segregates non-crossover chromosomes at a higher rate than if segregation were completely random. To study distributive segregation, we have generated diploid yeast with one homeologous chromosome pair consisting of a Saccharomyces cerevisiae chromosome …

Mississippi’S First Statewide Teachers’ Strike, Emily Doyne Smith

Master's Theses

This thesis argues that the Education Reform Act of 1982 (ERA) inadvertently led to Mississippi’s first statewide teachers’ strike in 1985 because of the Southeastern pay average clause recommending that the teachers’ pay should reach the average of the southeastern states, if possible. The teachers’ associations in Mississippi used this clause to lobby and promote teachers’ pay to that average. However, after two years of stagnated pay raises, the teachers’ associations led a state statewide teachers’ strike. The strike successfully raised the teachers’ salaries and moved state legislators to consider the teachers’ pay issue carefully afterwards. However, the pay raise …

A Content Analysis Of Section 1983 Litigation Against Reserve Police Officers, Michael Ryan Broadus

Master's Theses

Police studies have well developed a demonstrative framework for detailing risks which generate financially-detrimental civil litigation – particularly regarding 42 U.S.C. §1983. Conversely, though, police studies have given little attention to the often-used but differentially-trained reserve police officer. Primarily replicating the methodologies of Kappeler, Kappeler, and del Carmen (1993) and Ross (2000), this descriptive study sought to fill this void via a manifest content approach to purposively select a sample of Section 1983 cases decided by U.S. District Courts over a 16-year period (2001-2016) to determine: (1) if significant liability was generated by reserve officers, (2) the main basis for …

Development Of Semantic Reference For Location Symbols By Bottlenose Dolphins (Tursiops Truncatus) Using A Two-Way Communication Keyboard, Alyssa Taylor

Master's Theses

The ability for humans to communicate with another species has been an aspiration and well documented. One example is through training animals to make associations between a designated cue and conditioned response (Pryor, 1986). Two-way communication, however, in which both species can express wants/needs has been predominantly pursued with apes and dolphins. Studies conducted by Louis Herman demonstrated the capabilities of dolphins to comprehend complex semantic and syntactic commands in an artificial language system (Herman, Richards, & Wolz, 1984). Researchers working with primates have used American Sign Language, a computer keyboard system with discrete lexigrams, and a portable lexigram keyboard …

Modifying The Mineral Profile Of Crickets (Acheta Domesticus) Using A Supplemented Diet, Rhianne Morgan Le Maxwell

Master's Theses

Captive insectivores may consume invertebrates as all, or part of their overall diet. The challenge with feeding captive insectivores involves the limited number of invertebrate species that are commercially available, and the lack of key nutrients provided by these insects. Among these insects, a naturally occurring low concentration of calcium and an inverse calcium to phosphorus ratio may put insectivores at the risk of developing hypocalcemia. A strategy to correct this nutrient imbalance involves supplementing the insect diet with high concentrations of targeted nutrients – a term referred to as gut-loading. Current industry guidelines recommend feeding a supplemented diet for …