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Calcium Carbonate Particle Size Effects On Titanium Dioxide Light Scattering In Coatings, Jason W. Boke

Master's Theses

Titanium dioxide (TiO2) is an essential component in a white paint formulation due to its excellent light scattering ability. TiO2 also happens to make up most of the raw materials cost. Viable replacements to TiO2 do not currently exist in a feasible manner. Rising costs in the recent TiO2 supply shortage have forced coatings formulators to find a balance between cost and performance. One method includes partial substitution of TiO2 with cheaper material such as calcium carbonate (CaCO3), which serves to occupy volume.

The purpose of this study was to compare the coating spread rate of paints with varying TiO2 …

Analysis Of An Unusual Liquid Crystal Phase Transition, Loni Ann Fuller

Physics

Liquid crystals are a unique phase of matter that resemble a state between a solid and liquid. Within these properties, liquid crystal molecules have the ability to align and create layers. From this phenomenon, many electro-optical effects can be investigated, such as measuring the tilt angle between molecules at different temperatures and applied electric fields and also measuring the birefringence, which is a unique property of liquid crystals in which the index of refraction of the sample behaves differently along different axes. In order to better understand these electro- optical effects, we designed a more precise protocol of measuring this …

Cataloging Lesson Plans Developed By Pre-Service Science Teachers During A Summer Research Experience, Robert Tollman Mclaren

Physics

This study is modeled after the senior project “Teachers Who Conduct Research and their Ability to Apply their Experience to Lesson Plans” by Cal Poly student Megan Ziegler and includes an independent analysis of the 2011 and 2012 lesson plans that participants in the STEM Teacher and Researcher (STAR) Program developed as part of their summer research experience. At the end of the STAR summer research program, STAR Fellows are required to submit lesson plans. During Spring Quarter of 2012, I had the opportunity to catalog lesson developed during Summer 2011. Later in Fall Quarter of 2012, Cal Poly undergraduates …

Beach Wheelchair Project, Rory Aronson, Joshua Marcum, Samuel Coyne, Alex Hayes, Alexa Colburn, Max Hessel, Benedikt Strauss, Marvin Rimmele, Marco Pietsch

Mechanical Engineering

The Beach Wheelchair, Sandcrawler, is a machine intended to help give people with disabilities the full beach experience. The non-profit organization Bridge II Sports sponsored this project, and tasked us with developing the design and fabricating a prototype. This chair has several features including a linkage mechanism that raises and lowers a chair relative to an external frame, hand crank drive with Gates Carbondrive belt and sprockets, buoyant Wheeleez balloon tires, and much more.

Understanding The Increased Prevalence Of Autism In The United States, Jenna Marie Mendes

Social Sciences

No abstract provided.

Policies And Implementation Of Global Development, Scott Kjorlien

Social Sciences

International development is a very bulky topic of debate in today’s day in age. People from many different noble professions have extremely varying views of what exactly development is and how it should be executed. This paper is a starting point to understanding the various aspects of modern implementation of development. This paper gives an overview of definitions and measures of development, common paradigms in development theory and practices and implementation of post WWII development.

Surfactant Formulations For Water-Based Processing Of A Polythiophene Derivative, Cameron Dean Danesh

Master's Theses

Conjugated polymers are semiconducting materials that are currently being researched for numerous applications from chemical and biological sensors to electronic devices, including photovoltaics and transistors. Much of the novel research on conjugated polymers is performed in academic settings, where scientists are working to prepare conjugated polymers for commercially viable applications. By offering numerous advantages, inherent in macromolecular materials, conjugated polymers may hold the key to cheap and environmentally friendly manufacturing of future electronic devices. Mechanical flexibility, and solvent-based coating processes are two commonly cited advantages. Transitions in the backbone conformation of polythiophenes (PT) in organic solvents have been widely observed …

Barriers To Sustainable Beverage Packaging, Noelle Shoda

Graphic Communication

The purpose of this study was to determine the reasons for why a company would not implement beverage packaging with recycled content and/or bioplastic and whether or not size of a company plays a factor in its ability to implement sustainable beverage packaging. A face-to-face interview was carried out with industry professionals, as well as an email interview with a beverage company in order to gain insight from two perspectives regarding the main barriers to implementation and effect of size. Trends and companies within the beverage packaging industry were researched to discover what kinds of changes have been made, for …

The Nasa Glenn Research Center: An Economic Impact Study Fiscal Year 2012, Iryna Lendel, Eunkyu Lee

All Maxine Goodman Levin School of Urban Affairs Publications

No abstract provided.

Social Media And Citation Metrics, Linda M. Galloway, Anne E. Rauh

Librarian Publications

Quantifying scholarly output via traditional citation metrics is the time-honored method to gauge academic success. However, as the tentacles of social media spread into professional personas, scholars are interacting more frequently and more meaningfully with these tools. Measuring the influence and impact of scholarly engagement with online tools and networks is gaining importance in academia today.

Assessing the impact of a scholar’s work can be measured by evaluating several factors including the number of peer-reviewed publications, citations to these publications and the influence of the publications. These metrics take a relatively long time to accumulate, some are available only via …

Unraveling The Activation Mechanism Of The Potato Tuber Adp-Glucose Pyrophosphorylase, Carlos M. Figueroa, Misty L. Kuhn, Christine A. Falaschetti, Ligin Solamen, Kenneth W. Olsen, Miguel Ballicora, Alberto A. Iglesias

Chemistry: Faculty Publications and Other Works

ADP-glucose pyrophosphorylase regulates the synthesis of glycogen in bacteria and of starch in plants. The enzyme from plants is mainly activated by 3-phosphoglycerate and is a heterotetramer comprising two small and two large subunits. Here, we found that two highly conserved residues are critical for triggering the activation of the potato tuber ADP-glucose pyrophosphorylase, as shown by site-directed mutagenesis. Mutations in the small subunit, which bears the catalytic function in this potato tuber form, had a more dramatic effect on disrupting the allosteric activation than those introduced in the large subunit, which is mainly modulatory. Our results strongly agree with …

What's On The Other Side? A Conversation With Brent L. Top On The Spirit World

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

Representations Of Privileged Motherhood In Nineteenth-Century Literature: A Comparative Analysis Of Leo Tolstoy’S Anna Karenina And Kate Chopin’S The Awakening, Dina Alhassani

Theses and Dissertations

The heroines of Tolstoy’s Anna Karenina and Chopin’s The Awakening enjoy the autonomy of privileged motherhood in the nineteenth century. This role allows them the opportunities to forge their identities independent of most of the societal expectations which defined nineteenth-century feminine gender roles. The spinster enjoyed independence and yet had limited social interactions due to her perceived lack of femininity. By contrast, most mothers from lower and middle class backgrounds had fulfilled the idealized maternal role at the expense of independence and self-determination. In the context of nineteenth-century gender roles, the privileged mother enjoys the combined best aspects of spinsterhood …

Gender Differences In Performances Of Medical Students At One Medical School In Taiwan, Chien-Da Huang, Yeu-Jhy Chang, Han-Pin Kuo, Jing-Long Huang, Ji-Tseng Fang

Journal of Medical Education

Purpose: Women still face strong challenges since stereotypes remain an important issue in medical education. This study investigated the influence of gender on the school performances of medical students at one medical school in Taiwan. Methods: The research subjects were 695 students of the School of Medicine at Chang Gung University who were admitted from 2003 to 2009, including 202 (29.1%) women. Differences of admission pathways and school performances, including academic grade point averages, extracurricular activities, behavior records, and leadership positions between women and men were analyzed. Multinominal analysis was used for independent factor survey. Results: Among the students, 152 …

Distribution Of Burrowing Owls In East- Central South Dakota, Jiill A. Shaffer, Jason P. Thiele

The Prairie Naturalist

Western burrowing owl (Athene cunicularia hypugaea) populations have declined across much of western North America, particularly at the northern and eastern edges of the species’ breeding range (Martell et al. 2001, Murphy et al. 2001, Shyry et al. 2001, Skeel et al. 2001, Klute et al. 2003). In South Dakota, the burrowing owl is a summer resident that historically was relatively common throughout the state, but its range has decreased in recent decades, especially in the eastern half of the state (Whitney et al. 1978, South Dakota Ornithologists’ Union [SDOU] 1991, Peterson 1995). Tallman et al. (2002) described the species …

Notes: Nesting Patterns Of Red-Tailed Hawks And Great-Horned Owls In South-Cen- Tral Kansas, William Langley

The Prairie Naturalist

Red-tailed hawks (Buteo jamaicensis) and great-horned owls (Bubo virginianus) can influence the nesting behavior of each other through direct competition for nesting sites. For instance, owls begin nesting before hawks and, thus, can use nests from the previous year and prevent hawks from occupying those sites (Orians and Kuhl- man 1956, Gilmer et al. 1983, Minor et al. 1993). However, both species sometimes kill the nestlings of the other (Craig- head and Craighead 1956, Bosakowski et al. 1989).

The objective of my study was to investigate nesting patterns of these two raptors at the edge of the tallgrass prairie over …

Research Notes Vs. Research Articles, Christopher N. Jacques

The Prairie Naturalist

Greetings GPNSS members! I hope this email finds you well, winding down another academic year, and looking forward to the summer field season. Warm temperatures, peak foliage, and heightened anticipation of the start of another field season are upon us following a long winter season and unusually wet spring for many of us across the Great Plains. Here in westcentral Illinois, wild turkeys are gobbling, neotropical migrants are singing and establishing breeding territories, and white-tailed deer are within days of giving birth to the next generation of fawns. Granted, there are many outdoor activities to participate in, though oppressive heat …

Physical Properties Of Pectin Aqueous Solutions Containing Sunflower Wax, Erica R. Baümler, Amalia A. Carelli, Silvana Martini

Nutrition, Dietetics, and Food Sciences Faculty Publications

The aim of this study is to investigate the physical properties of aqueous solutions of pectin (PA) containing sunflower wax (SFW), which are used as a basis for producing edible films. The stability and the rheological and microstructural characteristics of SFW/PA mixtures were evaluated. SFW/PA mixtures formed oil-in-water emulsions that were milky and opaque in appearance and were stable towards phase separation. Polarized micrographs revealed the presence of wax crystals, whose size decreased as pectin concentration increased. The rheological behavior of the aqueous solutions of pectin containing different amounts of SFW were best described by the generalized power law model …

Kinetics Of Various Chemical Changes During Storage Of Processed Cheese, H. R. Gupta, K. L. Arora, Prateek Sharma, S. K. Kanawjia

Nutrition, Dietetics, and Food Sciences Faculty Publications

Three batches of processed cheese (PC) were manufactured by the standard procedure and packed aseptically in polystyrene (Sunpet) pet jars with screw cap of about 200 g capacity and stored at 5, 30 and, 45°C. The PC samples were analysed for proximate composition, selected physico-chemical characteristics and sensory attributes at intervals of 7 days for the product stored at 5°C upto 56 days, 3 days for the product stored at 30°C upto 6 days and 24 days at 45°C till the sample became organoleptically unacceptable. The results revealed that 30°C was conducive for mold growth, due to which the product …

Does Selective Migration Explain The Hispanic Paradox?: A Comparative Analysis Of Mexicans In The U.S. And Mexico, Georgiana Bostean

Sociology Faculty Articles and Research

Latino immigrants, particularly Mexican, have some health advantages over U.S.-born Mexicans and Whites. Because of their lower socioeconomic status, this phenomenon has been called the epidemiologic “Hispanic Paradox.” While cultural theories have dominated explanations for the Paradox, the role of selective migration has been inadequately addressed. This study is among the few to combine Mexican and U.S. data to examine health selectivity in activity limitation, self-rated health, and chronic conditions among Mexican immigrants, ages 18 and over. Drawing on theories of selective migration, this study tested the “healthy migrant” and “salmon-bias” hypotheses by comparing the health of Mexican immigrants in …

Dynamics Of International Nonprofit Capacity Building Partnerships, Julia Sparkman

College of Communication Theses and Dissertations

This study worked to expand the discourse of international nonprofit capacity building research. In the field of Communication, research investigating international nonprofit partnerships is limited, and some international communities lack a voice within the scholarship. Through the lens of postcolonial reflexivity, the author traveled to Kenya to conduct participant observations and one-on-one interviews with a US Capacity Building Nonprofit (USCBN) and two local Kenyan nonprofit organizations (the KCN and the KSN). The findings revealed that the USCBN established previous organizational alliances with the KCN and the KSN. The previous alliances led to strong relationships. The relationships engendered collaboration within the …

Global Analysis Of Drosophila Cys2-His2 Zinc Finger Proteins Reveals A Multitude Of Novel Recognition Motifs And Binding Determinants, Ryan G. Christensen, Gary D. Stormo, Et Al

Open Access Publications

No abstract provided.

Obesity Is Associated With Poor Surgical Outcome In Crohn's Disease, Talha Malik, Ashish Manne, Robert Oster, Austin Eckhoff, Seidu Inusah, Alexandra M Gutierrez

Open Access Publications

BACKGROUND: Published data suggest a link between obesity and adverse outcomes in Crohn's disease (CD). We aimed to test the hypothesis that obese CD patients would be more likely than non-obese CD patients to have poor surgical outcome when undergoing surgery for a complication of CD.

METHODS: We designed a retrospective cohort study to test our hypothesis. The population comprised of adult CD patients who underwent CD related surgery at a tertiary referral center. The exposed and unexposed cohorts were represented by patients who were obese vs. non-obese at the pre-op visit respectively. Outcome was represented by successful vs. unsuccessful …

Algorithms For Library-Based Microbial Source Tracking, Aldrin Montana

Master's Theses

Pyroprinting is a novel, library-based microbial source tracking method developed by the Biology department at Cal Poly, San Luis Obispo. This method consists of two parts: (1) a collection of bacterial fingerprints, called pyroprints, from known host species, and (2) a method for pyroprint comparison. Currently, Cal Poly Library of Pyroprints (CPLOP), a web-based database application, provides storage and analysis of over $10000$ pyroprints. This number is quickly growing as students and researchers continue to use pyroprinting for research. Biologists conducting research using pyroprinting rely on methods for partitioning collected bacterial isolates into bacterial strains. Clustering algorithms are commonly used …

Analysis Of Protein Pre-Coatings And Their Effect On Endothelial Cell Adhesion In A Tissue Engineered Blood Vessel Mimic, Rachel Ann Gohres

Master's Theses

Cardiovascular disease is the leading cause of death in developing countries. Because thousands of people are affected by this disease, medical device companies are constantly developing new intravascular devices in attempt to cure or alleviate the symptoms of the disease. However, before these devices can be brought to market or implanted in to patients, they must complete three stages of testing to receive FDA approval. These testing stages include: in vitro testing, in vivo testing, and clinical trials. Currently, there is a large gap between in vitro and in vivo testing because it is difficult to obtain physiologic information about …

Assessing Physiological Thresholds For Eelgrass (Zostera Marina L.) Survival In The Face Of Climate Change, Carolyn Jane Ewers

Master's Theses

Seagrasses are well known for the important ecological roles they play in coastal marine waters worldwide. However, the severe rate of decline observed in seagrasses this century is expected to accelerate with climate change. Conservation efforts can be improved by quantifying physiological thresholds of seagrasses and using these estimates in modeling to forecast changes in distribution. This study examines the response of eelgrass (Zostera marina L.) across current temperatures to look for early warning signs of vulnerability and to evaluate the ways we determine critical thresholds for survival. Whole eelgrass ramets, collected from three beds in Morro Bay, California, …

The Effects Of Age On Muscle Loss And Tissue-Specific Levels Of Nf-ĸb And Sirt6 Proteins In Rats, Tiev C. Laguire

Master's Theses

The objective of this study was to examine the influence of age on food intake, tissue and organ mass and NF-ĸB and SIRT6 levels in various tissues. The transcription factor, Nuclear Factor Kappa-B (NF-ĸB), is associated with both catabolic and anabolic pathways of muscle metabolism and may be involved in age-related muscle loss. SIRT6 is a member of the sirtuin family of proteins that function as protein lysine deacetylases and are associated with longevity in a number of organisms. Male Sprague-Dawley rats, aged 6 months (Adult) and 21 months (Old) were fed a commercially available diet for 10-17 days. Old …

Applying Sustainability From A Systems Perspective:, Timothy Brophy

Master's Theses

Becoming sustainable is no longer an option. Current industry methods will not be able to support the necessary changes our growing society demands. In order to keep up with ever increasing demands industry will be aimed toward making major system changes toward a fully sustainable model. As of right now only basic sustainability actions have been put in place. Industry needs to make a strategic change toward resilient systems with an end goal of evolving into fully biomimic systems. This thesis covers a brief history of production leading to the Industrial Revolution which created a need for increased sustainability efforts. …

The Bicycle-Powered Smartphone Charger, Chris Arntzen

Master's Theses

This thesis entails the design and fabrication of a smartphone charger that is powered by a bicycle dynamo hub. In addition to the design and validation of the charger prototype, this thesis involves the testing and characterization of the dynamo hub power source, the design and construction of specialized test equipment, and the design and prototyping of a handlebar-mounted case for the smartphone and charging electronics. With the intention of making the device a commercial product, price, aesthetics, and marketability are of importance to the design. An appropriate description of the charger circuit is a microcontroller-based energy management system, tailored …

A Multiphysics Simulation Of A Coronary Artery, Garry L. Howe

Master's Theses

This thesis hypothesizes that a commercially available multiphysics simulation software package can be easily employed to characterize the fluid flow and mechanical behavior in healthy and diseased arteries. To this end, multiphysics model of a coronary artery —the LAD artery—was created in COMSOL Multiphysics®. Wall shear stresses and distension were examined to validate the model. Such a model can be adapted to guide the design of cardiovascular devices.