Digital Commons Network^™

Influence Of Chelating Agents On Proteolysis Of Micellar Casein Slurries, Azucena Becerril Diez

Master's Theses

ABSTRACT

Influence of chelating agents on proteolysis

of micellar casein slurries

Azucena Becerril Díez

The focus of this research was to analyze the effect of Ca chelators on the proteolytic activity of rennet during ripening of a micellar casein slurry. This research was divided in two phases. During the first phase, preliminary studies were performed to understand the behavior of rennet and the milk system in the presence of chelating agents. A solution of reconstituted skim milk at 10% (w/v) was prepared. Individual samples of this solution were divided in two study groups, samples with chelators and rennet and samples …

Arc Fault Circuit Interrupter Development For Residential Dc Electricity, Cassidy Alan Aarstad

Master's Theses

The following technical report describes the development and testing of an arc fault circuit interrupter (AFCI) for DC circuits operating primarily at 48 volts. We have identified an effective method for determining when arcing is occurring. Our method is primarily based on comparing the frequency spectrum of current flowing through the circuit during an arcing event to a known characteristic spectrum. Once an arc has been identified, our interrupter is capable of responding adequately to eliminate the arc. Hardware tests show the AFCI developed in this thesis responded, in all test cases, within 2 seconds of an arc fault occurrence. …

Ncma Groundwater Model Using Usgs Modflow-2005/Pest, Brian Matthew Wallace

Master's Theses

A numerical model for the NCMA aquifer complex is presented. The objective of the study is to develop a numerical groundwater model for the NCMA aquifer system to enhance the understanding of subsurface groundwater flow. Infiltration, streamflow, pumping, and return flows are implemented to characterize the aquifer complex over time. The numerical model is calibrated to municipal and monitoring well data, average monthly water balances, and hydraulic contours. Transient aquifer inflows and outflows are assessed in the results of the study and are compared to balance terms from previous studies. The 2007 Todd Engineers Study subsurface inflows and outflows generate …

Astro – A Low-Cost, Low-Power Cluster For Cpu-Gpu Hybrid Computing Using The Jetson Tk1, Sean Kai Sheen

Master's Theses

With the rising costs of large scale distributed systems many researchers have began looking at utilizing low power architectures for clusters. In this paper, we describe our Astro cluster, which consists of 46 NVIDIA Jetson TK1 nodes each equipped with an ARM Cortex A15 CPU, 192 core Kepler GPU, 2 GB of RAM, and 16 GB of flash storage. The cluster has a number of advantages when compared to conventional clusters including lower power usage, ambient cooling, shared memory between the CPU and GPU, and affordability. The cluster is built using commodity hardware and can be setup for relatively low …

The Effects Of Latency On 3d Interactive Data Visualizations, Allen Korenevsky

Master's Theses

Interactive data visualizations must respond fluidly to user input to be effective, or so we assume. In fact it is unknown exactly how fast a visualization must run to present every facet within a dataset. An engineering team with limited resources is left with intuition and estimates to determine if their application performs sufficiently well.

This thesis studies how latency affects users' comprehension of data visualizations, specifically 3D geospatial visualizations with large data sets. Subjects used a climate visualization showing temperatures spanning from the 19th to the 21st century to answer multiple choice questions. Metrics like their eye movements, time …

Concatenative Synthesis For Novel Timbral Creation, James Eric Bilous

Master's Theses

Modern day musicians rely on a variety of instruments for musical expression. Tones produced from electronic instruments have become almost as commonplace as those produced by traditional ones as evidenced by the plethora of artists who can be found composing and performing with nothing more than a personal computer. This desire to embrace technical innovation as a means to augment performance art has created a budding field in computer science that explores the creation and manipulation of sound for artistic purposes. One facet of this new frontier concerns timbral creation, or the development of new sounds with unique characteristics that …

Automating Self Evaluations For Software Engineers, Jonathan Rodrigo A. Miranda

Master's Theses

Software engineers frequently compose self-evaluations as part of employee perfor- mance reviews. These evaluations can be a key artifact for assessing a software engineer’s contributions to a team and organization, and for generating useful feed- back. Self-evaluations can be challenging because a) they can be time consuming, b) individuals may forget about important contributions especially when the review period is long such as a full year, c) some individuals can consciously or unconsciously overstate their contributions, and d) some individuals can be reluctant to describe their contributions for fear of appearing too proud [24].

UNBIASED, Useful New Basic Interactive Automated …

Bim And Communication: Implementation Of Building Information Modeling Into An Integrated Project Delivery Contract To Encourage Project Teams To Communicate, Kathleen Worden

Master's Theses

The objective of this thesis is to explore BIM, IPD and their implementation into a building project contract. The Integrated Delivery Processes is comprised of a collaborative team of Designers, Constructors, and Owners working side by side to create a successful project. BIM has been introduced as a technology into the industry, as a tool that these parties can use for better understanding the project.

Through case studies of IPD projects using BIM are observed, it was determined that although BIM was used, one problem faced is the lack of BIM standards included initially in a contract for in an …

Graduate Internship In Agricultural Education- Avila Valley Barn Field Trip Guide, Emily Taylor

Agricultural Education: Graduate Internship Reports

The Avila Valley Barn Field Trip Guide connects engaging farm-based activities to content standards, including Next Generation Science Standards, California Agriculture and Natural Resources standards, and California Health Education Standards for K-12 students.

Graduate Internship In Agricultural Education: Templeton High School, Erica Lynn Guido

Agricultural Education: Graduate Internship Reports

This internship report includes validation documents required in meeting the quality criteria for secondary-level programs of instruction in agriculture. The documents are concurrently used for the Agriculture Incentive Grant review process at Templeton High School conducted by representatives of the California Department of Education. The internship included the design and installation of a pruning orchard for the Templeton High School Agriculture Department. This orchard will serve as a learning lab for students and promote a variety of Supervised Agriculture Experience projects. Following the internship report, is a copy of our Comprehensive Program Plan for additional support.

The Rsvp Production Manager, Ethan Cantrell

Music

A brief guide to the responsibilities of the 2016 RSVP production manager

Music And Language Development: Traits Of Nursery Rhymes And Their Impact On Children's Language Development, Ashley Lauren Gonzalez

Music

From birth--possibly even before birth--the amount and array of external stimuli profoundly affect a child’s cognitive and linguistic development. In addition to verbal communication from parent to child, singing proves to be an integral aid to a child’s development of speech and language, allegedly due to repetitions of words and rhythms. Nursery rhymes are, from infancy, among the most commonly presented forms of musical stimulus for children. The repetitive nature of the nursery rhymes undoubtedly supports language and speech development, but various characteristics of nursery rhymes, specifically pitch interval, meter, phrase length, contour, and harmony, also contribute substantially to the …

How To Make The Jailhouse Rock: An Evaluation Of Effective Music Therapy Methods Among Juvenile Offenders, Katelyn Rose Tomasello

Music

No abstract provided.

Probing The Source Of Ionization Of Gas In Local Active Galaxies, Jake J. Haslemann

Physics

The [OIII]/Hβnarrow ratio is a good first indicator of the source of ionization of gas in the vicinity of Active Galactic Nuclei (AGNs). If [OIII]/Hβnarrow > 10 then it is likely AGN ionization, for [OIII]/Hβnarrow < 3 it is likely attributed to star formation. While we know that all galaxies host an AGN, and thus expect at least the gas in the very central region to be AGN ionized, this research specifically focuses on the spatially resolved spectra at different distances from the center. We make use of an IDL code to fit the different components in high signal-to-noise optical long-slit spectra from the 10m Keck telescope of 87 Seyfert galaxies in the local universe (0.02 107M⊙) A transition of the gas from being predominantly AGN-ionized to ionization by stars in the galaxy allows us to determine the size of the Narrow Line Region (NLR). Of the 102 objects in our sample, when looking at the peak height [OIII]/Hβnarrow ratio, only 6 objects showed a clear transition between [OIII]/Hβnarrow > 10 to [OIII]/Hβnarrow < 3. There were 22 other objects that showed a basic transition (went from [OIII]/Hβnarrow > 3 to [OIII]/Hβnarrow < 3). These are still significant because we know that these objects are AGN ionized in the center so the size of their NLR is still determined. When looking at the integrated [OIII]/Hβnarrow ratio, 8 objects showed a clear transition, and 35 more showed a basic transition. 5 objects had an [OIII]/Hβnarrow < 3 throughout all of their spectra in both the integrated and peak height graphs which questions the use of BPT diagrams for determining ionization source.

Adaptive Stand Up Paddleboard, Stephen Eldridge, Claire Francis, Curtis Hodgson, Haley Rentfro, Spencer Shotts

Mechanical Engineering

The task of this project was to create an adaptive paddleboard capable of being ridden by someone who does not have full mobility in one or more of their lower extremities. This project was worked on by a team of five students - three mechanical engineers and two kinesiology students - to create an effective and robust design for the client. To do this, the team regularly met with the client and used individual and group expertise in various fields to bring the best product to the end user.

The client, Damien, was a firefighter who was injured in July …

Ultra-Light Bear Canister, Naveen Beasley, Eli Rogers, Cory Wilson, Donald Wood

Mechanical Engineering

A bear canister is the primary tool used by outdoor enthusiasts to protect their food from bears while camping or backpacking. There are many effective products currently on the market, however many are not designed with reduced weight in mind. Hardcore backpackers want to have the lightest gear possible to ease the strain of carrying a large pack for sometimes weeks at a time.

Current bear canisters exist that utilize carbon fiber for weight reduction, however they rely on stock carbon tubes and lack engineering analysis, and no competitor has a fully composite bear canister available. Our sponsor, Nick Hellewell, …

Electric Vehicle Torque Vectoring And Rear Steering Control System, Garrett Heinen, Vincent Lee, Michael Parker, Michael Saggese

Mechanical Engineering

NDA

Improvement Of Mounting Techniques For Accelerated Wear Testing Of Artificial Heart Valves, Kyle Koon, Clay Bougher, Lawrence Yang

Mechanical Engineering

Confidential

High­Impact Textile Joining For Uav Landing Application: Tensile Testing Of Textiles, Patrick Michniuk, Matthew Ferretti, Jennifer Ford

Mechanical Engineering

The main objective of this project is to improve upon the current stitching pattern used in UAV catch net applications with the intention of lengthening their useable life cycle. To achieve this, a testing setup and procedure has been developed to produce material strength and stiffness data for nylon­ webbing strap, and for sewn intersections of the same strap material. The current stitching pattern was tested, and quantitatively characterized based on strength and stiffness. New stitching designs were generated and tested using the same procedure, and the results compared. This allowed for the selection of the most optimized stitching pattern …

Flow Meter Test Rig, Cory Davis, Emily Guss, Michael Swartz

Mechanical Engineering

As part of a fluid mechanics laboratory, there should be an experiment that demonstrates the proper use of flow meters, devices that are necessary and relevant in many fluids-related industries. In order to provide students with exposure to these types of devices and how they work, a test rig was developed with the ability to interchange a variety of flow meters in order to broaden the students’ knowledge of the different types of measuring devices. This report was also written to outline the steps taken to ensure the test rig would match a laboratory and industry setting. Additionally, it was …

Metals Am Design For Manufacturing, Maren Cosens, Ben Wong, Kevin Hale

Mechanical Engineering

We are looking to improve upon the current post processing techniques for metal additive manufacturing (AM). This project, sponsored by Lawrence Livermore National Laboratory (LLNL), will investigate ways to improve the design of stainless steel 316 parts made by AM, and how these designs will help with post processing techniques. We hope that the findings regarding stainless steel will apply to to improve the AM and post processing handshake in general. In particular, the project will focus on including different features in different basic part design shapes to aid in fixturing and post-processing of the part made by AM. This …

Efficiency Testing Of An Electronic Speed Controller, Grace Cowell, Matthew Hudson, Marcus Pereira

Mechanical Engineering

This project required the development of a rig that could experimentally determine the efficiency of an Electronic Speed Controller (ESC). The selected design focuses on measuring the losses due to heat from the device and comparing this to its input power. The selected design is a flow rig that utilizes the heat equation q=ṁcpΔT. The rig provides a steady state measurement of the ESC heat output by passing a known mass flow rate of air across the ESC and measuring the temperature difference. It uses a flowmeter to determine ṁ, thermocouples to determine ΔT, and a table lookup to determine …

Stress Ecology Of The Pacific Rattlesnakes (Crotalus Oreganus And Crotalus Helleri), Natalie Claunch

Master's Theses

Stress is a physiological state induced by disturbance or adverse environmental conditions and is modulated by the glucocorticoid hormone corticosterone (CORT) in reptiles. Stressors can have various impacts on vertebrate trait expression and may affect survival or reproduction. Little is known about the effects of chronically elevated CORT in free-ranging reptiles, or the effect of disturbance stress on venom composition in captive snakes.

In chapter 1, we investigated the effects of researcher induced disturbance on CORT levels and venom composition in a group of captive Northern Pacific rattlesnakes (Crotalus oreganus). Venom protein concentration and plasma CORT levels were …

Grain Orientation Effects On The Rotating-Bending Fatigue Properties Of Forged 7050-T7452 Aluminum Alloy, Matt Cristler, Jonas Zhang

Materials Engineering

In order to investigate the effects of grain orientation on the high cycle fatigue properties of 7050-T7452 aerospace grade aluminum, rotating-bending fatigue tests were performed on longitudinal (LG) and short transverse (ST) specimens taken from two sample sets (Method A and Method B) of open die forged 7050 aluminum. The fatigue specimens were machined to a 0.2" gage diameter and 4" length and subsequently hand polished to a mirror finish to minimize potential crack initiation sites. The tests were conducted on a Fatigue Dynamics RBF-300 HT tester in the fully reversed loading condition, with stress levels varying from 20 ksi …

Life Cycle Assessment Of Paper Versus Electronic Assignment Submission In Cal Poly's Materials Engineering, Patrick Mcdonnal

Materials Engineering

Both hard and soft copy submission of assignments make an impact on the environment to produce the final product in terms of energy consumption and carbon emissions; an investigation was conducted as to which method is less environmentally impactful. Student disposition towards each assignment submission method was also investigated because it is associated with learning efficacy. A survey was conducted in Cal Poly’s Materials Engineering Department to determine the contributing components to the environmental impact of paper and electronic assignments, as well as the students’ disposition towards each of them. Contributing components are man-made products used by a student to …

Life Cycle Assessment And Comparison Of Magnesium Oxide Nanoparticles Prepared By Aqueous And Microwave Synthesis Methods, Jesse Cartland

Materials Engineering

Abstract: Magnesium oxide nanoparticles are being used increasingly as catalysts for organic synthesis, fuel oil additives, and CO₂ adsorbents. There are many ways to produce magnesium oxide nanoparticles, but there is little information available regarding the environmental costs of production. As demand for environmentally friendly materials increases, it is important to understand environmental impact differences between various production methods. This study will compare the differences in embodied energy and global warming potential (GWP) between two synthesis methods: microwave combustion synthesis (microwave synthesis) and oxidation of magnesium hydroxide (aqueous synthesis). The resulting nanoparticles were characterized using scanning electron microscopy (SEM), …

Manufacturing And Characterization Of Poly (Lactic Acid)/Carbon Black Conductive Composites For Fdm Feedstock: An Exploratory Study, Dylan Fitz-Gerald, Justin Boothe

Materials Engineering

This exploratory study developed methods of manufacturing and characterizing the electrical properties of small batches of conductive composite feedstock for the Fused Deposition Modeling (FDM) manufacturing process, commonly known as 3D printing. We utilized a solution casting process of Poly(lactic acid) (PLA) (Grade 4043D, NatureWorks, LLC.) and Carbon Black (CB) (Vulcan® XC72, Cabot Corp.) in chloroform. The resulting composite precursor was cryogenically treated with liquid nitrogen and milled in a coffee grinder in order to achieve particles that could be fed into the extruder. Composite precursors were dried in a vacuum oven at an elevated temperature of 38°C. Filaments were …

Modern Horror Film And The Evolution Of The "Final Girl", Josi Bertling

Communication Studies

No abstract provided.

The Ideology Of Commodification In The Music Industry, As Exemplified By Taylor Swift, Sydney Taylor Jordan

Communication Studies

No abstract provided.

Effects Of Intrapersonal Communication On Reverse Culture Shock, Serena Brown

Communication Studies

This paper explores the connection between reflective writing in the form of journals and blogs and reverse culture shock in study abroad returnees. The experiences of 66 American college-aged students were analyzed in order to determine a relationship between the two variables. The study revealed significant findings that bear upon both students and expats returning to the U.S. First, those who engaged in journal writing reported higher levels of reverse culture shock than those who did not keep a journal. Furthermore, those who participated in any sort of writing, journals or blogs, had higher self-reported reverse culture shock than those …