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California Polytechnic State University, San Luis Obispo

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Hydrodynamics In A Shallow Seasonally Low-Inflow Estuary Following Eelgrass Collapse, Ryan K. Walter, Edwin J. Rainville, Jennifer K. O'Leary Aug 2018

Hydrodynamics In A Shallow Seasonally Low-Inflow Estuary Following Eelgrass Collapse, Ryan K. Walter, Edwin J. Rainville, Jennifer K. O'Leary

Physics

Hydrodynamics play a critical role in mediating biological and ecological processes and can have major impacts on the distribution of habitat-forming species. Low-inflow estuaries are widespread in arid regions and during the dry season in Mediterranean climates. There is a growing need to evaluate dynamics and exchange processes in these systems and the resultant ecological linkages. We investigate the role that hydrodynamics play in shaping environmental gradients in a short and seasonally low-inflow estuary located along the central California coast. Since 2007, eelgrass meadows in Morro Bay have declined by more than 90%, representing the collapse of the major …

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As-869-19 Resolution To Modify The Bylaws Of The Academic Senate, Academic Senate Executive Committee Aug 2018

As-869-19 Resolution To Modify The Bylaws Of The Academic Senate, Academic Senate Executive Committee

Academic Senate Resolutions

The consent agenda is a tool for increasing the efficiency of meetings; and the consent agenda is a procedure where a group of items are approved in a single motion without discussion; therefore be it that the Bylaws of the Academic Senate be modified as shown on the attached copy.

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Relationship Between Time-Constants And 3db Cutoff Of High-Order Damped Lti Systems, Vladimir I. Prodanov, Katherina Prodanov Aug 2018

Relationship Between Time-Constants And 3db Cutoff Of High-Order Damped Lti Systems, Vladimir I. Prodanov, Katherina Prodanov

Electrical Engineering

This paper deals with linear time-invariant (LTI) systems and examines the link between the 3dB cutoff and time-constants. It shows that the cutoff frequency of a low-pass damped network can be estimated from the reciprocal of a p-norm calculated from the system's time-constants. Furthermore, to achieve good accuracy the p factor must have a fractional value, for example, p=1.7. Two formulas are derived, and their performance evaluated using Monte Carlo simulations which reveal a sub-3% error for most cases.

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Burning Of Traditional Biofuels And The Global Methane Budget, Samantha L. Claveau, Lori Bruhwiler, Christine Wiedinmyer Aug 2018

Burning Of Traditional Biofuels And The Global Methane Budget, Samantha L. Claveau, Lori Bruhwiler, Christine Wiedinmyer

STAR Program Research Presentations

Understanding biomass burning is important for understanding atmospheric carbon budgets. The two main types of biomass burning are wildfires, and the burning of traditional biofuels. Both types of biomass burning produce methane, among other gases. Satellites in space help quantify area burned from wildfires. However, it is much more difficult to quantify the burning of traditional biofuels, such as animal waste, fuelwood, charcoal, crop material, and peat. Therefore, limited information is available regarding these process, and how they contribute to human caused climate change. Here, we have developed a global inventory of methane emissions from the burning of traditional biofuels …

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Scale-Invariant Geometric Data Analysis (Sigda), Marina Girgis, Max Robinson Aug 2018

Scale-Invariant Geometric Data Analysis (Sigda), Marina Girgis, Max Robinson

STAR Program Research Presentations

The purpose of this research is to introduce a new data analysis method called Scale Invariant Geometric Data Analysis (SIGDA). SIGDA has been shown to be more informative than more common data analysis methods, such as Principal Component Analysis (PCA). SIGDA is used to visualize complex data sets in a way that accurately preserves data patterns and behavior. SIGDA is designed to preserve relative ratios in a numerical matrix, and the number of entries has to be more than the total number of rows and columns. Our research involved providing a simple explanation of SIGDA's mathematical process—simple enough for the …

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Impacts Of Nutrient Enrichment On Native And Non-Native Plants In Serpentine Soil, Amber R. Williams, Mary Devlin, N. Rajakaruna Aug 2018

Impacts Of Nutrient Enrichment On Native And Non-Native Plants In Serpentine Soil, Amber R. Williams, Mary Devlin, N. Rajakaruna

STAR Program Research Presentations

Serpentine soil, derived from serpentinite, California’s state rock, is characterized by its harsh nature - due to its low levels of essential nutrients and exceptionally high levels of toxic heavy metals.In California, serpentine soils are characterized by high levels of plant endemism and rarity. Plants occurring in serpentine soil exhibit extreme tolerance of harsh soil conditions, and are typically out-competed in ‘normal’ soils due to the cost associated with physiological specialization. Atmospheric nutrient deposition is contributing to a greater invasion of non-native grass species on serpentine soils, outcompeting the native species and threatening them with local extinction. Our greenhouse study …

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Visualization Of Geospatial Data As An Analytical And Educational Tool, Richard A. Vu Aug 2018

Visualization Of Geospatial Data As An Analytical And Educational Tool, Richard A. Vu

STAR Program Research Presentations

World Wind is an open-source API developed for Java, Android, and browsers that is designed to visualize and interact with geospatial data. The Web World Wind client is composed of four major components: the HTML template, the globe, geospatial features, and application features. The template was implemented using Bootstrap and hosts the globe provided by World Wind. This globe draws its data from multiple imagery sources, including the Open Geospatial Consortium (OGC) Web Map Service and Web Map Tile Service. This enables the application to perform and visualize complex calculations with multiple types of data such as weather and terrain. …

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Tof-Sims Analysis Of Plant Seed Interactions With Plant Growth-Promoting Bacteria, Tammy Pheuphong, Rachel Komorek, Xiao-Ying Yu Aug 2018

Tof-Sims Analysis Of Plant Seed Interactions With Plant Growth-Promoting Bacteria, Tammy Pheuphong, Rachel Komorek, Xiao-Ying Yu

STAR Program Research Presentations

The use of time-of-flight secondary ion mass spectrometry (ToF-SIMS) in plant biology is a relatively unexplored and quickly developing field. The majority of research in plant SIMS involves the application of ToF-SIMS to study dried wood tissues, and only a handful of studies apply SIMS on plant stems, roots, and/or seeds. Our project provides a brief description and review of previous work using SIMS on plant stems, roots, and/or seeds, along with an emphasis on the sample preparation in each study. Additionally, the use of Brachypodium distachyon (Brachypodium) as a model system for research on grasses has also become more …

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Applications Of Diels-Alder Chemistry In Polymer Synthesis, Joshua C. Stambaugh, Philip J. Costanzo, Sierra E. Gosting Aug 2018

Applications Of Diels-Alder Chemistry In Polymer Synthesis, Joshua C. Stambaugh, Philip J. Costanzo, Sierra E. Gosting

STAR Program Research Presentations

Diels-Alder chemistry is utilized for a myriad of commercial applications during polymer synthesis, ranging from self-healing materials to heat responsive materials to emulsion coatings. In particular, the ability to regulate and control the amount and type of functional group linkages is key component for polymer applications. A common strategy that is employed is the use of phenolic maleimide as a dienophile during Diels-Alder synthesis to control the linkages on a polymer, which determines its properties and functionality. This summer was the beginning of a project to prepare a commercial scale, water-based emulsion floor coating/polish. The first step in this project …

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Anisotropic Conductive Adhesives For Interdigitated Back Contact (Ibc) Silicon Solar Cells, Katherine M. Lohmuste, Manuel Schnabel, Maikel F.A.M. Van Hest Aug 2018

Anisotropic Conductive Adhesives For Interdigitated Back Contact (Ibc) Silicon Solar Cells, Katherine M. Lohmuste, Manuel Schnabel, Maikel F.A.M. Van Hest

STAR Program Research Presentations

The current manufacturing process for solar panels using interdigitated back contact (IBC) silicon solar cells involves a multi-step metallization and interconnection process in which a substantial amount of silver is used. This work focuses on a new process using conductive adhesives (CA) which would increase efficiency and lower cost through a one-step metallization and interconnection process that combines with encapsulation using little silver and only requiring metal patterning on the back sheet or back glass. It would also not require direct metallization of the silicon, which would result in fewer defects, while increasing voltage and therefore efficiency. Silver-coated Poly(Methyl Methacrylate) …

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Dreamer Technologies' Home Automation System, David Lennon, Chandler Warne, Jordan Shaw Aug 2018

Dreamer Technologies' Home Automation System, David Lennon, Chandler Warne, Jordan Shaw

Baker/Koob Endowments Awarded Projects

The home automation market has been growing rapidly over the course of the last few years, and it is expected to grow by 143% between 2015 and 2022.1 In the next few years, the connected home automation system will come to fruition and there will be home automation systems for sale that allows users to control any home device seamlessly from an easy to use interface. While there are many home automation companies already in the market, none of them have truly captured the idea of the connected smart home. All of the systems are lacking in some area, whether …

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Influence Of A Guanidine Riboswitch In Bacterial Cells, Erik S. Timsak, Jefferey A. Kimbrel, Chris S. Ward, Rhona K. Stuart, Michael P. Thelen Aug 2018

Influence Of A Guanidine Riboswitch In Bacterial Cells, Erik S. Timsak, Jefferey A. Kimbrel, Chris S. Ward, Rhona K. Stuart, Michael P. Thelen

STAR Program Research Presentations

Bacteria live in environments containing complex ecologies of other microbes that communicate and survive through the action of a variety of small metabolic compounds. One common yet relatively unstudied metabolite is guanidine. Although it can be toxic to cells, recent studies have revealed that guanidine may function as a cellular metabolite through a specialized RNA sequence known as a riboswitch. Within our overall project on improving algal productivity, the focus of this study is to: (a) describe various guanidine riboswitch sequences in bacteria that interact with biofuel producing algae; and (b) determine if guanidine has a positive or negative influence …

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Can We Detect Undeclared Facilities In The Nuclear Fuel Cycle Using Mathematical Simulations?, Kassandra Guajardo, Lee Burke, Romarie Morales Rosado Aug 2018

Can We Detect Undeclared Facilities In The Nuclear Fuel Cycle Using Mathematical Simulations?, Kassandra Guajardo, Lee Burke, Romarie Morales Rosado

STAR Program Research Presentations

What if there was a way to detect undeclared (Clandestine) facilities using data sets from a nuclear facility? The Statistical Modeling and Experimental Design group at the Pacific Northwest National Laboratory are developing the Modeling and Inference for Remote Sensing (MIRS) model. The model uses two deterrence scenarios within the nuclear fuel cycle to detect undeclared facilities. The two scenarios are used in an agent based nuclear fuel cycle simulator to produce the declared and undeclared feed, tails assay, and sink inventory in kilograms of Uranium. In the first scenario, natural uranium is being diverted from the conversion plant to …

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Breakpoint Analysis Of Modis Vegetarian Cover Change In Southern California Deserts, Rebecca Baiman Aug 2018

Breakpoint Analysis Of Modis Vegetarian Cover Change In Southern California Deserts, Rebecca Baiman

STAR Program Research Presentations

This study applies time series breakpoint analysis to look at Moderate Resolution Imaging Spectroradiometer (MODIS) data of southern California. Past studies have looked at this desert land using Landsat data in order to analyze any changes the environment has gone through due to renewable energy development or other factors. This study develops a method for utilizing structural change models to study the DRECP land area. Focusing on breakpoints, this study found that most positive breakpoints represented years with high rainfall. Additionally, sandy washes with little vegetation did not yield any breakpoint between 2000 and 2018. This study can be used …

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Reducing Extreme Suffering For Non-Human Animals: Enhancement Vs. Smaller Future Populations?, Magnus Vinding Aug 2018

Reducing Extreme Suffering For Non-Human Animals: Enhancement Vs. Smaller Future Populations?, Magnus Vinding

Between the Species

This paper argues that ethical views that place primary importance on the reduction of extreme suffering imply that, at least in theory, it can be better to allow enhanced non-human animals to come into existence rather than unenhanced non-human animals. Furthermore, they imply that it would be even better if no non-human animals came into existence at all. However, it is unclear, from the perspective of these ethical views, whether enhancement or reduction of future populations is the more effective strategy in practice, and whether it might even be better to instead pursue a seemingly more robust and less controversial …

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Experimental Study And Modeling Of The GM-I Dependence Of Long-Channel Mosfets, Michael Cheng, Vladimir I. Prodanov Aug 2018

Experimental Study And Modeling Of The GM-I Dependence Of Long-Channel Mosfets, Michael Cheng, Vladimir I. Prodanov

Electrical Engineering

This paper describes an experimental study and modeling of the current-transconductance dependence of the ALD1106 and ALD1107 arrays. The study tests the hypothesis that the I-g m dependence of these 7.8 μm MOSFETs conforms to the Advanced Compact Model (ACM). Results from performed measurements, however, do not support this expectation. Despite the relatively large length, both ALD1106 and ALD1107 show sufficiently pronounced `short-channel' effects to render the ACM inadequate. As a byproduct of this effort, we confirmed the modified ACM equation. With an m factor of approximately 0.6, it captures the I-g m dependence quite well. The paper also introduces …

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Inverse Dynamic Analysis Of Acl Reconstructed Knee Joint Biomechanics During Gait And Cycling Using Opensim, Megan V. Pottinger Aug 2018

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 …

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Detecting A Probiotic Product Within The Gut Of Broiler Chickens, Anneka Pisula Aug 2018

Detecting A Probiotic Product Within The Gut Of Broiler Chickens, Anneka Pisula

Master's Theses

As of January 2017, the U.S. poultry industry banned the use of antibiotics and now relies on alternatives such as probiotics to help protect animal health. Although probiotic use is not a new concept in the poultry industry, identifying the best combination of bacterial strains to generate an effective probiotic formula requires further investigation. This study aimed to detect a probiotic product of four bacterial strains (Pedioccoccus acidilactici, Pediococcus pentosaceus, Lactobacillus plantarum, and Bacillus subtilis) in a feeding trial with broiler chickens. Birds given the probiotic were predicted to show an improved growth performance with …

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Design And Analysis Of A Parabolic Trough Solar Concentrator, George N. Skouras Aug 2018

Design And Analysis Of A Parabolic Trough Solar Concentrator, George N. Skouras

Master's Theses

A prototype solar desalination system (SODESAL) with a parabolic-trough solar concentrator (PTSC) and evacuated tube was designed and analyzed to determine the solar thermal capabilities for small-scale distillation and energy generation. A proof-of-concept study verified that distillation is possible with the system as designed, however a rupture occurred in the copper heat-pipe heat exchanger due to overheating. The internal temperatures of an aluminum heat transfer fin were measured inside an evacuated tube typically used in solar water heater systems to understand the lateral heat distribution and identify possible causes of the rupture. Solar radiation was measured for both the summer …

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The Roles Of Tid1, Ndj1, And Spo16 In Distributive Segregation During Saccharomyces Cerevisiae Meiosis, Ethan Atticus Shaw Aug 2018

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 …

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Effects Of Polydatin On In Vitro Bovine Embryo Developmental Competence, Metabolism, And Cryopreservation, Corie Marie Owen Aug 2018

Effects Of Polydatin On In Vitro Bovine Embryo Developmental Competence, Metabolism, And Cryopreservation, Corie Marie Owen

Master's Theses

Bovine in vitro produced embryos suffer from poor developmental competence and altered metabolism which hinders their cryotolerance. Overall, the goals of this thesis were to improve oocyte and embryo culture with the antioxidant polydatin and to optimize slow freezing procedures. This thesis was designed as three experiments, and in each experiment, oocytes were aspirated from abattoir ovaries, matured for 23h, fertilized with semen from 1 of 3 bulls, and cultured in synthetic oviductal (SOF) based medium (SCF1) in 38.5 °C in 5% O2, 5% CO2 and 90% N2. Stage 7 blastocysts were stained with Nile …

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Quantifying The Environmental Performance Of A Stream Habitat Improvement Project, Cody Morse Aug 2018

Quantifying The Environmental Performance Of A Stream Habitat Improvement Project, Cody Morse

Master's Theses

River restoration projects are being installed worldwide to rehabilitate degraded river habitat. Many of these projects focus on stream habitat improvement (SHI), and an estimated 60%of the 37,000 projects listed in the National River Restoration Science Synthesis Program focus on SHI for salmon and trout species. These projects frequently lack a sufficient monitoring program or account for the environmental costs associated with SHI. The present study used life cycle assessment (LCA) techniques and topographic effectiveness monitoring to quantify environmental costs on the basis of geomorphic change. This methodology was a novel approach to assessing the cost-benefit relationship of SHI. To …

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Assessment Of Granulovirus, Spinosad, And Mating Disruption For Controlling Cydia Pomonella L. [Lepidoptera: Tortricidae] In Organic Coastal California Apple Orchards, Raven Lukehart Aug 2018

Assessment Of Granulovirus, Spinosad, And Mating Disruption For Controlling Cydia Pomonella L. [Lepidoptera: Tortricidae] In Organic Coastal California Apple Orchards, Raven Lukehart

Master's Theses

Codling moth, Cydia pomonella[Lepidoptera: Tortricidae], is a major entomological pest of apples, pears, and walnuts cross the world (Pajac et al. 2016). Female codling moths lay eggs on the apple exocarp and larvae burrow within the fruit causing economic losses to fruit growers.Organic apple orchards in San Luis Obispo, CA currently have three codling moth, Cydia pomonella,control options commercially available including granulovirus (CpVG), spinosad, and mating disruption. In field tests on apple (Malus), we compare percent fruit injury between treatments of granulovirus (2.43 oz/ha Cyd-X® organically approved, Certis USA, Columbia MD), spinosad (4.05 oz/ha Entrust® Naturalyte® …

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Evaluation Of Endothelial Cell Responses To Elevated Glucose, Gabriella Sugerman Aug 2018

Evaluation Of Endothelial Cell Responses To Elevated Glucose, Gabriella Sugerman

Master's Theses

Developing a tissue-engineered Blood Vessel Mimic (BVM) to represent diabetic macrovascular disease could expedite design of new vascular devices specifically tailored to diabetic patients. In contribution toward this model, this thesis assessed Human Umbilical Vein Endothelial Cell (HUVEC) responses to high glucose conditions. Interleukin 6 (IL-6) and Cluster of Differentiation 36 (CD36) were selected to signify oxidative stress activity, a hallmark of diabetic macrovascular disease. Next, activity of potential reference genes B2M, HPRT1, and ACTB was assessed. All genes were found to exceed acceptable variability, so the E-ΔC T method of data analysis was selected. Next, cellular responses to high …

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Revisiting Earthquake Lessons: Wall Anchorage To Flexible Diaphragms, John W. Lawson Aug 2018

Revisiting Earthquake Lessons: Wall Anchorage To Flexible Diaphragms, John W. Lawson

Architectural Engineering

In the 1971 San Fernando earthquake, large numbers of concrete tilt-up warehouse buildings had partial roof collapses as perimeter walls separated from the roof. The culprit was a design flaw that relied upon wood ledgers in cross-grain tension/bending for anchorage of the wall to the roof diaphragm. In the 1984 Morgan Hill and 1989 Loma Prieta earthquakes, instrumented tilt-up buildings indicated that past code-level anchorage forces were too low; and in the 1994 Northridge earthquake it was observed that anchorage systems had insufficient ductility and overstrength to resist the high force demands.

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Looking Toward The Future: The Value Of Geothermal Energy In The United States Power Market, Reilly R. Moran Aug 2018

Looking Toward The Future: The Value Of Geothermal Energy In The United States Power Market, Reilly R. Moran

STAR Program Research Presentations

States are creating renewable portfolio standards (RPSs) that require utilities to run off a certain percentage of renewables. With the new RPSs and current emission standards the dynamic of the grids energy and reliability needs are changing. Because RPSs and emission standards, utilities are procuring the cheapest renewable resources, which tend to be solar and wind. As RPSs increase over time this causes higher procurements of solar and wind. Higher procurement and increasing penetration levels of solar and wind is causing their energy values to decrease as well as some reliability concerns. While geothermal energy value will continue to stay …

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Pnnl Dark Matter Bubble Chamber, Ryan Robinson Aug 2018

Pnnl Dark Matter Bubble Chamber, Ryan Robinson

STAR Program Research Presentations

The Pacific Northwest National Laboratory (PNNL) prototype bubble chamber is intended to address issues encountered with the current PICO dark matter search detectors and improve the functionality of future experimental designs. The PNNL bubble chamber accomplishes this with a simplified interface between the hydraulic pressure controls and the target vessel and altering the standard chamber design such that it can be easily exchanged and replaced with vessels of various sizes and materials for testing purposes. The chamber itself is a glass vessel which houses perfluorobutane and holds the target fluid above room temperature and atmospheric pressure. The target fluid becomes …

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Modifying The Mineral Profile Of Crickets (Acheta Domesticus) Using A Supplemented Diet, Rhianne Morgan Le Maxwell Aug 2018

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 …

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Crossing Corridors: Wildlife Use Of Jumpouts And Undercrossings Along A Highway With Wildlife Exclusion Fencing, Alex J. Jensen Aug 2018

Crossing Corridors: Wildlife Use Of Jumpouts And Undercrossings Along A Highway With Wildlife Exclusion Fencing, Alex J. Jensen

Master's Theses

Roads pose two central problems for wildlife: wildlife-vehicle collisions (WVCs) and habitat fragmentation. Wildlife exclusion fencing can reduce WVCs but can exacerbate fragmentation. In Chapter 1, I summarize the relevant studies addressing these two problems, with a focus on large mammals in North America. Chapters 2 and 3 summarize field assessments of technologies to reduce WVCs and maintain connectivity, specifically jumpout ramps and underpasses, along Highway 101 near San Luis Obispo, CA. In a fenced highway, some animals inevitably breach the fence and become trapped, which increases the risk of a wildlife-vehicle collision. Earthen escape ramps, or “jumpouts”, can allow …

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Asic Design Of Rf Energy Harvester Using 0.13um Cmos Technology, Jainish K. Zaveri Aug 2018

Asic Design Of Rf Energy Harvester Using 0.13um Cmos Technology, Jainish K. Zaveri

Master's Theses

Recent advances in wireless sensor nodes, data acquisition devices, wearable and implantable medical devices have paved way for low power (sub 50uW) devices. These devices generally use small solid state or thin film batteries for power supply which need replacement or need to be removed for charging. RF energy harvesting technology can be used to charge these batteries without the need to remove the battery from the device, thus providing a sustainable power supply. In other cases, a battery can become unnecessary altogether. This enables us to deploy wireless network nodes in places where regular physical access to the nodes …

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