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An Analysis Of Preservation Versus Conservation: The Future Of Whaling, Elizabeth Paige Fennie

History

No abstract provided.

Dc Dielectrophoretic Assisted Anti-Fouling Filtration System, Nathan M. Cohen

Master's Theses

Filtration processes, whether on the microfluidic, clinical treatment systems, or industrial scale (e.g., point-of-care diagnostics, dialysis, and biopharmaceutical manufacturing, respectively), are often inseparable from membrane clogging (fouling). As a consequence, most, if not all, filtration systems require frequent maintenance to maintain functionality and efficiency. The thesis of this project hypothesizes that Dielectrophoresis can be combined with standard filtration to reduce filter fouling, extending membrane life, and enabling continuous operation. This project investigates a method to reduce fouling, add specificity and efficiency, and decrease the cost and challenge of filtration based biofluid separations.

To substantiate this thesis, we designed, fabricated, and …

Vitamin D Sub-Set Analysis From The Flash Study, Megan Bishop, Laura Hall, Ann Mcdermott, Aydin Nazmi

Master's Theses

Vitamin D is important to the health of college students. The objective of our study was to measure sun exposure, skin pigmentation, vitamin D intake, and serum 25-hydroxyvitamin D (25[OH]D) in a subset of participants from The Following the Longitudinal Aspects of Student Health (FLASH) Study to determine the best predictors of 25(OH)D status. Participants were college-aged freshman who had their blood drawn in spring (Visit 1) and fall 2010 (Visit 2) at California Polytechnic State University (Cal Poly), San Luis Obispo, CA. (35.3°N). Vitamin D intake was measured using a 28-day food frequency recall questionnaire (specific to vitamin D …

Landbird Response To Fine-Scale Habitat Characteristics Within Riparian Forests Of The Central California Coast, Ronald E. Melcer Jr.

Master's Theses

Riparian corridors in California are known to be an important but reduced and degraded resource for landbirds. In spite of previous research, the habitat characteristics that correlate with high landbird abundance remain poorly understood. In particular, the scale at which predictive models are useful (fine scale, watershed, sub-region or region) is ill defined. Herein, point count-based abundance indices for 8 riparian associated/obligate species with uniform and high detection probabilities are correlated with biotic and abiotic habitat variables: a sums of squares procedure is used to select the top 5 predictive variables for each species, best fit linear models are selected …

Responsive Materials Via Diels-Alder Chemistry, Gregory Alan Strange

Master's Theses

The corrosion of infrastructure imposes a significant monetary cost, and at times human cost, upon society. Methods to improve corrosion resistance of materials are described herein which utilize the reversibility of the Diels-Alder reaction to impart thermal responsiveness upon materials. Such stimuli responsiveness can potentially play a role in self healing properties which lead to reduced cracking and thus increased corrosion protection.

Reversible Diels-Alder chemistry was utilized to manipulate the surface energy of glass substrates. Hydrophobic dieneophiles were prepared and attached to glass slides and capillaries to yield a nonwetting surface. Thermal treatment of the surfaces cleaved the Diels-Alder linkage, …

Comparing The Demographics Of Two Steelhead Populations And Their Habitat Characteristics, Eileen Ann Baglivio

Master's Theses

Currently, little is known about the demographics of the Oncorhynchus mykiss irideus, or steelhead trout, populations in San Luis Obispo County. Specifically, demographic information including length, age, and condition when first leaving a watershed for the open ocean is lacking. This thesis takes a closer look at a biological and environmental data collected by the California Department of Fish and Game Central Coast Steelhead and Coho Salmon project under the direction of Associate Biologist Jennifer Nelson. The main goal of this thesis is to analyze demographic and habitat data from the steelhead populations of two northern San Luis Obispo …

Development Of A Standardized Method For Comparing Biomechanical Properties Of Various Sternal Closure Techniques, Ramzi P. Hawit

Master's Theses

Background:

33.6% of all deaths in America are caused by cardiovascular disease. An estimated 82.6 million adults (>1 in 3) in America have some form of cardiovascular disease. There were over 400,000 bypass surgeries requiring open-heart surgery. Sternal dehiscence is associated with a morbidity rate of over 47% if mediastinitis supervenes. A rigid closure is required to avoid healing complications, and wire, plates, and bands are all used in an attempt to make a better closure. The purpose of this study it to compare multiple closures and validate a new testing method.

Methods:

Polyurethane foam blocks will be used, …

Improving First-Year Success And Retention Through Interest-Based Cs0 Courses, Michael Haungs, Christopher Clark, John Clements, David Janzen

Computer Science and Software Engineering

Many computer science programs suffer from low student retention rates. At Cal Poly San Luis Obispo, academic performance and retention rates among first year computer science students are among the lowest on campus.

In order to remedy this, we have developed a new CS0 course featuring different "tracks" that students can choose from (e.g. robotics, gaming, music, mobile apps). This allows students to learn the basics of programming, teamwork, and college-level study in a domain that is of personal interest. In addition, the course relies on classic Project-based Learning (PBL) approaches as well as a focus on both academic and …

Mousetraps And How To Avoid Them: The Convergence Of Utilitarian And Scientific Cases For Limiting The Mouse Model In Biomedical Research, Cynthia Townley, Brett Lidbury

Between the Species

The primary aim of biomedical research is to discover and develop new knowledge to advance human medicine. Frequently a ‘mouse model’ is taken to be a necessary step towards understanding a disease, biological mechanism or intervention. We argue for caution with respect to the mouse model: theoretical reasons, meta-analyses of empirical data, and viable alternatives all support a more restricted use of animals in laboratories than is current practice. On its own terms, a utilitarian scientific justification for using animals in biomedical research converges more closely with welfarist claims than is usually recognised.

The Chicken Challenge – What Contemporary Studies Of Fowl Mean For Science And Ethics, Carolynn L. Smith, Jane Johnson

Between the Species

Studies with captive fowl have revealed that they possess greater cognitive capacities than previously thought. We now know that fowl have sophisticated cognitive and communicative skills, which had hitherto been associated only with certain primates. Several theories have been advanced to explain the evolution of such complex behavior. Central to these theories is the enlargement of the brain in species with greater mental capacities. Fowl present us with a conundrum, however, because they show the behaviors anticipated by the theories but do not have the expected changes in the brain. Consequently fowl present two challenges of interest to us here. …

Animal Models For Human Disease – Reflections From An Animal Researcher’S Perspective, Imke Tammen

Between the Species

Neuronal ceroid lipofuscinoses (NCL) are a group of lethal inherited neurodegenerative disorders in humans and many animal species. Critical reflections on a range of ethical issues concerning NCL have been instigated by my research on sheep and cattle affected with NCL, the claim that these sheep and cattle are useful models for the disease in humans, and engagement with families and support groups. My reflections on moral status of animals and validity of animal models are outlined in this paper.

February 1, 2012 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

The Design And Fabrication Of A Microfluidic Reactor For Synthesis Of Cadmium Selenide Quantum Dots Using Silicon And Glass Substrates, Peter Robert Gonsalves

Master's Theses

A microfluidic reactor for synthesizing cadmium selenide (CdSe) quantum dots (QDs) was synthesized out of a silicon wafer and Pyrex glass. Microfabrication techniques were used to etch channels into the silicon wafer. Holes were wet-drilled into the Pyrex glass using a diamond-tip drill bit. The Pyrex wafer was anodically bonded to the etched silicon wafer to enclose the microfluidic reactor. Conditions for anodic bonding were created by exposing the stacked substrates to 300V at ~350oC under 5.46N of force. A syringe containing a room temperature CdSe solution was interfaced to the microfluidic reactor by using Poly (dimethylsiloxane) (PDMS) as an …

Effect Of Food Availability On Social Behavior In A Captive Group Of Bonobos (Pan Paniscus), Alyssa Semerdjian

Biological Sciences

Bonobos (Pan paniscus) tend to have low frequencies of aggression due to a suite of affiliative behaviors that are thought to relieve group tensions. A few of these possible behaviors are grooming, sociosexual activities, and strategic positioning in regards to proximity with other individuals at food sites, where most aggression occurs. This observational study sought to determine whether captive bonobos exhibit certain social behaviors at different rates, and have differing proximity preferences in regards to other individuals, when food was and was not available. Results show that when food was available, the apes were less affiliative with fewer …

Dobzhansky's Dictum: An Object Lesson For Critical Thinking, William D. Stansfield

Biological Sciences

A creationist has called Dobzhansky's dictum a myth. Discussion of this debate could be used as an object lesson for critical thinking.

Spontaneous Multiscale Phase Separation Within Fluorinated Xerogel Coatings For Fouling-Release Surfaces, Anastasiya Sokolova, Joseph J. Bailey, Grant T. Waltz, Lenora H. Brewer, John A. Finlay, Jill Fornalik, Dean Wendt, Maureen E. Callow, James A. Callow, Frank V. Bright, Michael R. Detty

Biological Sciences

Four-component xerogel films consisting of 1 mole-% n-octadecyltrimethoxysilane (C18) and 50 mole-% tetraethoxysilane (TEOS) in combination with 1–24 mole-% tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane (TDF) and 25–48 mole-% n-octyltriethoxysilane (C8) and a 1:49:50 mole-% C18/TDF/TEOS were prepared. Settlement of barnacle cyprids and removal of juvenile barnacles, settlement of zoospores of the alga Ulva linza, and strength of attachment of 7-day sporelings (young plants) of Ulva were compared amongst the xerogel formulations. Several of the xerogel formulations were comparable to poly(dimethylsiloxane) elastomer with respect to removal of juvenile barnacles and removal of sporeling biomass. The 1:4:45:50 and 1:14:35:50 C18/TDF/C8/TEOS xerogels displayed some phase …

Camera Survey Of Wildlife Corridors Adjacent To Highway 101, Grace K. Mannell, Chelsea E. Rose

Natural Resources Management and Environmental Sciences

Driving poses a significant threat to safety for both humans and wildlife. Along highway 101 in San Luis Obispo, California, is a stretch of roadway that is exceptionally deadly to mammals such as deer and bears. Roadkill counts and motion-activated cameras have been utilized along this route in a previous study (Perrine and Snyder, 2011) to assist Caltrans in setting up wildlife barriers. We sought to continue this research using remote motion-sensing cameras to monitor wildlife during winter and spring of 2011. We set up cameras at five previously monitored locations that had already been determined to host heavy wildlife …

Hiv And Aids Education: The Tanzanian Case, Katherine Ellison

Social Sciences

This project takes a look at the cultural, religious, and socio-economic roles that affect the spread of education regarding HIV/AIDS in Tanzania. A personal experience in Zanzibar, Tanzania was the incentive to spark interest in teaching. HIV/AIDS is a powerful epidemic that has taken the lives away from millions. This article takes a deeper look at the transmission, stigmas, and pathways for change.

Novel Magnetite-Producing Magnetotactic Bacteria Belonging To The Gammaproteobacteria, Christopher T. Lefèvre, Nathan Viloria, Marian L. Schmidt, Mihály Pósfai, Richard B. Frankel, Dennis A. Bazylinski

Physics

Two novel magnetotactic bacteria (MTB) were isolated from sediment and water collected from the Badwater Basin, Death Valley National Park and southeastern shore of the Salton Sea, respectively, and were designated as strains BW-2 and SS-5, respectively. Both organisms are rod-shaped, biomineralize magnetite, and are motile by means of flagella. The strains grow chemolithoautotrophically oxidizing thiosulfate and sulfide microaerobically as electron donors, with thiosulfate oxidized stoichiometrically to sulfate. They appear to utilize the Calvin–Benson–Bassham cycle for autotrophy based on ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) activity and the presence of partial sequences of RubisCO genes. Strains BW-2 and SS-5 biomineralize chains of octahedral …

Cal Poly Sponsors Master Storyteller Kendall Haven On Feb. 10, Public Affairs Office

Press Releases

No abstract provided.

Evaluation Of Bio-Optical Inversion Of Spectral Irradiance Measured From An Autonomous Underwater Vehicle, Mark A. Moline, Ian Robbins, Brian Zelenke, W. Scott Pegau, Hemantha Wijesekera

Biological Sciences

Autonomous underwater vehicles (AUVs) can map water conditions at high spatial (horizontal and vertical) and temporal resolution, including under cloudy conditions when satellite and airborne remote sensing are not feasible. As part of the RADYO program, we deployed a passive radiometer on an AUV in the Santa Barbara Channel and off the coast of Hawaii to apply existing bio-optical algorithms for characterizing the optical constituents of coastal seawater (i.e., dissolved organic material, algal biomass, and other particles). The spectral differences between attenuation coefficients were computed from ratios of downwelling irradiance measured at depth and used to provide estimates of the …

Cal Poly Society Of Women Engineers Honors Five Outstanding Members, Public Affairs Office

Press Releases

No abstract provided.

January 25, 2012 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

Can Vertical Migrations Of Dinoflagellates Explain Observed Bioluminescence Patterns During An Upwelling Event In Monterey Bay, California?, Igor Shulman, Bradley Penta, Mark A. Moline, Steven H.D. Haddock, Stephanie Anderson, Matthew J. Oliver, Peter Sakalaukus

Biological Sciences

Extensive AUVs surveys showed that during the development of upwelling, bioluminescent dinoflagellates from the northern part of the Monterey Bay, California (called the upwelling shadow area), were able to avoid advection by southward flowing currents along the entrance to the Bay, while non-bioluminescent phytoplankton were advected by currents. It is known that vertical swimming of dinoflagellates to deeper layers helps them avoid losses due to advection. In the present paper, we investigate if modeling dinoflagellates’ vertical swimming can explain the observed dinoflagellates’ ability to avoid advection during the upwelling development. The dynamics of a dinoflagellate population is modeled with the …

Cal Poly To Offer Compost Training In April, Public Affairs Office

Press Releases

No abstract provided.

January 11, 2012 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

Academic Senate - Meeting Minutes, 1/10/2012, Academic Senate

Academic Senate Minutes

No abstract provided.

Fully Enclosed Microfluidic Paper-Based Analytical Devices, Kevin M. Schilling, Anna L. Lepore, Jason A. Kurian, Andres W. Martinez

Chemistry and Biochemistry

This article introduces fully enclosed microfluidic paper-based analytical devices (microPADs) fabricated by printing toner on the top and bottom of the devices using a laser printer. Enclosing paper-based microfluidic channels protects the channels from contamination, contains and protects reagents stored on the device, contains fluids within the channels so that microPADs can be handled and operated more easily, and reduces evaporation of solutions from the channels. These benefits extend the capabilities of microPADs for applications as low-cost point-of-care diagnostic devices.

Does Lack Of Enrichment Invalidate Scientific Data Obtained From Rodents By Compromising Their Welfare?, Ann L. Baldwin Phd

Between the Species

In countries where major animal research is conducted, comprehensive laws exist to ensure that the animals’ physical needs are satisfactorily met. However, animals also require an environment that allows them to fulfill their behavioral needs; this will be the focus of the article. Two studies are described in detail, one on rats and the other on genetically modified mice, which were performed by the author to compare the effects of enriched and un-enriched cage environments on rodent physiology. Evidence is presented showing that if research rodents are housed in cages lacking structures that allow them to perform their normal behaviors, …

Sirtuin-Induced Protein Deacetylation Affects The Heat Shock Response In Blue Mussel Congeners (Mytilus), M. Beam, M. Zuzow, L. Tomanek

Biological Sciences

The warm-adapted Mediterranean blue mussel species Mytilus galloprovincialis invaded southern California during the last century and has since replaced the cold-adapted native M. trossulus from its southern range, possibly due to climate change. Based on previous proteomic analyses, we hypothesized that the more heat-sensitive M. trossulus switches from NADH-producing metabolic pathways that may generate reactive oxygen species (ROS) to NADPH-producing pathways that are able to scavenge ROS during severe heat stress (32°C). We further linked these changes to the activity of the mitochondrial NAD-dependent deacetylase, sirtuin-5, which has been shown to regulate many metabolic pathways. To test the latter hypothesis, …