Digital Commons Network^™

Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson

Master's Theses

In the world of educational satellites, student teams manually conduct operations daily, sending commands and collecting downlinked data. Educational satellites typically travel in a Low Earth Orbit allowing line of sight communication for approximately thirty minutes each day. This is manageable for student teams as the required manpower is minimal. The international Global Educational Network for Satellite Operations (GENSO), however, promises satellite contact upwards of sixteen hours per day by connecting earth stations all over the world through the Internet. This dramatic increase in satellite communication time is unreasonable for student teams to conduct manual operations and alternatives must be …

St Monitoring On The Programmer For Implantable Cardioverter Devices, Sarina Satya

Master's Theses

Cardiovascular disease is one of the most prevalent causes of death which has a high mortality rate. If identified early and treated appropriately, the mortality in patients with cardiovascular disease can be hugely reduced. For several decades, 12-Lead ECG has been the standard technique used to identify ischemia, and recent studies have shown that intracardiac electrogram has many benefits over external monitoring such as holter. ST Monitoring feature has been added to St. Jude Medical intracardiac cardioverter defibrillators (ICD) to leverage the ECG technology for identifying cardiovascular disease. This algorithm monitors the intracardiac electrogram to detect and report patterns which …

Performance Of A Stormwater Filter And Bacteria Inactivation Using Biocidal Media, Alexander Scott Bowerman

Master's Theses

There are many possible ways to mitigate stormwater pollution, but this study focused on the DrainPacTM catchment basin insert and the feasibility of integrating N-halamine biocidal brominated beads into the filter system. This study was divided into three sections. The first section involved testing a DrainPacTM filter for treatable flow rates, head loss, and removal of solids, oil, and bacteria. The DrainPacTM filter is designed to be installed in a stormwater catch basin. The filter is composed of a 12 x 41 inch metal frame with textile filter media attached to it in a basket shape. The upper portion of …

Bus On Shoulder: Local Assessment Of Shoulder Transit Lane For Regional Buses In San Luis Obispo County, Jessica R. Berry

Master's Theses

The study looks at the applicability of integrating a Bus Only Shoulder (BOS) into the intermittently congested segment of US 101 in southern San Luis Obispo County. Policy, infrastructure and implementing criteria derived from case studies in Minnesota, Florida and California (San Diego) and the 2007 California Decision Document on BOS are applied to conditions in the region. One measure of performance, time savings, is projected to 2025 to determine the value of integrating the program by that horizon year. Given the substantial potential for time savings in that future year, recommendations are made to create the appropriate policy and …

California As Music To American Ears: Migration, Technology, And Rock And Roll In The Golden State, 1946–2000, Toby T. Willett

Master's Theses

Migrations and technological advances in California following World War II, spurred radical changes in the production and development of popular music, most notably rock and roll. California largely lacked the entrenched traditions of the American Northeast, and in many ways its exploding population translated into the growth of a culture built around embracing newer methodologies, whether technological innovations or radical artistic departures. In large part owing to its increasing ethnic diversity during the economic expansion, California was uniquely poised to become a center of incredible postwar dynamism, especially when seen in the production, consumption, and stylistic development of music. Nevertheless, …

Receive Sensitivity Characterization Of The Polysat Satellite Communication System, Ivan M. Bland

Master's Theses

Following the successful launch of CP3 and CP4, the PolySat team noticed an unreliable uplink to both satellites. A significant problem with the PolySat COMM system is poor receive sensitivity of the communications system. Efforts have been made to improve the uplink margin, but without proper characterization of the receiver sensitivity, the problem cannot be fully addressed. By developing an accurate method of measuring receive sensitivity, a methodical approach can be used to properly diagnose the communication system and link budget. Two revisions of the PolySat COMM system will be measured and compared. An in-depth study of the PolySat COMM …

System Integration And Attitude Control Of A Low-Cost Spacecraft Attitude Dynamics Simulator, Ryan L. Kinnett

Master's Theses

The CalPoly Spacecraft Attitude Dynamics Simulator mimics the rotational dynamics of a spacecraft in orbit and acts as a testbed for spacecraft attitude control system development and demonstration. Prior to this thesis, the simulator platform and several subsystems had been designed and manufactured, but the total simulator system was not yet capable of closed-loop attitude control. Previous attempts to make the system controllable were primarily mired by data transport performance. Rather than exporting data to an external command computer, the strategy implemented in this thesis relies on a compact computer onboard the simulator platform to handle both attitude control processing …

A Prediction Of The Acoustical Output Of A Golf Driver Head Using Finite Elements, Roger Sharpe

Master's Theses

A simulation was created using LS-DYNA® to determine the acoustical properties of a golf ball and golf driver head impact. LS-DYNA® has a coupled finite element analysis (FEA) and boundary element method (BEM) solver that uses the integral form of Helmholtz’s acoustic wave equation to deliver predicted sound pressure levels at predetermined acoustic points. Validation of the modeling was done on a simple plate donated by Titleist Golf. The plate was modeled and meshed using TrueGrid and impacted by a three layer golf ball model derived from “Tanka’s” paper on multilayered golf balls. The final converging model consisted of 10,900 …

City Of Davis Greenbelt Master Plan, Brandon Haydu

Master's Theses

The City of Davis is currently updating its Parks and Recreation Facilities Master Plan. During the update, greenbelts were identified as a highly used and desired facility. This Greenbelt Master Plan serves as a plan focused on the opportunities greenbelts can provide as recreational and transportation facilities. This report has analyzed community feedback, greenbelt coverage, greenbelt capacity, and existing local, state, and federal design guidelines. The final plan is a set of goals, objectives, policies, and programs, along with a greenbelt map, which is aimed at improving the greenbelt infrastructure in Davis through the year 2020.

Space Communication Channel Emulation Using Digital And Analog Signal Processing, Tom Hickok

Master's Theses

New communication protocols intended for large distances, including low orbit and deep space, can be inherently difficult to evaluate since trial implementations are often impractical. In order to accurately measure the performance of a new protocol, it is important to evaluate it in an environment that most closely matchs that in which it will be used. This thesis demonstrates the ability to emulate a space communications channel through digitizing a transmission centered at an intermediate frequency of 70 MHz with a bandwidth of 24 MHz, digitally introducing the characteristics of a transmission through space, and reconstructing the digital data to …

Time-Temperature Curing Relationship Of An Adhesive Binder With Rice Straw, Kevin Ka-Wan Ng

Master's Theses

Rice straw is a global and proliferate agricultural waste whose production grossly outstrips viable uses. Current disposal methods are not sustainable, and more convenient methods – such as incineration – exude poor environmental stewardship. Although the direct use of straw bales in building construction presents a practical and sustainable alternative, engineering challenges associated with using it prevent its wide adoption. The Stak Block – a composite formed from compressed rice straw and a heat-cured adhesive – may overcome challenges associated with straw bale building. However, the times and temperatures needed to cure the binder with straw are not well understood. …

Adaptive Control Applied To The Cal Poly Spacecraft Attitude Dynamics Simulator, Matthew C. Downs

Master's Theses

The goal of this thesis is to use the Cal Poly Spacecraft Attitude Dynamics Simulator to provide proof of concept of two adaptive control theories developed by former Cal Poly students: Nonlinear Direct Model Reference Adaptive Control and Adaptive Output Feedback Control. The Spacecraft Attitude Dynamics Simulator is a student-built air bearing spacecraft simulator controlled by four reaction wheels in a pyramidal arrangement. Tests were performed to determine the effectiveness of the two adaptive control theories under nominal operating conditions, a “plug-and-play” spacecraft scenario, and under simulated actuator damage. Proof of concept of the adaptive control theories applied to attitude …

Studies On Real-Valued Negative Selection Algorithms For Self-Nonself Discrimination, Shane E. Dixon

Master's Theses

The artificial immune system (AIS) is an emerging research field of computational intelligence that is inspired by the principle of biological immune systems. With the adaptive learning ability and a self-organization and robustness nature, the immunology based AIS algorithms have successfully been applied to solve many engineering problems in recent years, such as computer network security analysis, fault detection, and data mining.

The real-valued negative selection algorithm (RNSA) is a computational model of the self/non-self discrimination process performed by the T-cells in natural immune systems. In this research, three different real-valued negative selection algorithms (i.e., the detectors with fixed radius, …

Control Law Design And Validation For A Helicopter In-Flight Simulator, Brian T. Fujizawa

Master's Theses

In-flight simulation allows one aircraft to simulate the dynamic response of another aircraft. A control system designed to give RASCAL, a JUH-60A Black Hawk helicopter based at Moffett Field, CA, in-flight simulation capabilities has been designed, optimized and validated in this research. A classical explicit model following control system with a frequency dependent feedback controller was used. The frequency dependent controller allows model following of the attitude in the short term and the velocity in the long term. Controller gains were optimized using a high order, linearized model of UH-60 dynamics. Non-linear simulations of the control laws were performed, first …

An Investigation Of Humeral Stress Fractures In Racing Thoroughbreds Using A 3d Finite Element Model In Conjunction With A Bone Remodeling Algorithm, Ryan James Moore

Master's Theses

The humerus of a racing horse Thoroughbred is highly susceptible to stress fractures at a characteristic location as a result of cyclic loading. The propensity of a Thoroughbred to exhibit humeral fracture has made equines useful models in the epidemiology of stress fractures. In this study, a racing Thoroughbred humerus was simulated during training using a 3D finite element model in conjunction with a bone remodeling algorithm. Nine muscle forces and two contact forces were applied to the 3-dimensional finite element model, which contains four separate load cases representing fore-stance, mid-stance, aft-stance, and standing. Four different training programs were incorporated …

The Presence Of Micropterus Salmoides (Largemouth Bass) Influences The Populations Of Rana Draytonii (California Red-Legged Frog) And Pseudacris Regilla (Pacific Treefrog) In Two Ponds In Santa Barbara County, California, Kenneth Lee Gilliland

Master's Theses

Alien fish have been implicated in the decline of Rana draytonii (California red-legged frog) and Pseudacris regilla (Pacific treefrog) populations. Micropterus salmoides (largemouth bass) is a common sport fish that has been introduced into the sympatric range of these two anuran species; however, no studies have investigated the individual influence that this alien fish has on these two species. I conducted M. salmoides control or eradication experiments during a four year study in two ponds within the Transverse Mountain Range of Santa Barbara County, California. Changes in the densities of all life stages of R. draytonii and P. regilla were …

Identification Of Physical Changes To A Steel Frame, Daniel Eric Means

Master's Theses

The thesis utilized physical testing and computer modeling to determine the feasibility of identifying a change to the mass or stiffness of a steel frame. Physical testing was performed using an accelerometer, linear shaker, and arbitrary function generator. Two methods of laboratory testing were developed: ambient vibration testing (AVT) and forced vibration testing (FVT). AVT was able to preliminarily identify the natural frequencies and mode shapes of the frame. FVT was able to precisely identify four distinct natural frequencies, mode shapes, and damping ratios. The baseline frame then underwent two physical changes: the addition of mass to its roof, and …

Merlin.Net Automation Of External Reports Verification Process, Gabriel John Wettlaufer

Master's Theses

Merlin.net Patient Care Network is a St. Jude Medical product that is used for remote patient management. The basic concept of Merlin.net is to allow the physician to view patient device follow-up information as well as general patient and device information on a web application. The Merlin.net system also interfaces with the patient and will send them notification if they miss a follow-up. All device information will be collected automatically while the patient is sleeping. This information is sent through a telephone line to a Merlin.net server to process a report package and display the collected information on the Merlin.net …

The San Jose Joint Library: The Development Of A Joint City/University Library, Joel Eanes

Master's Theses

The Dr. Martin Luther King, Jr., Library is the largest library building west of the Mississippi River, and uses a rare joint library structure, merging the main San Jose Public Library and the library of San Jose State University. Both the decision to construct a new library, and the decision to merge two institutions, caused enormous controversy during the development and construction of the building from 1997 to 2003.

This thesis examines the nature of joint libraries, and why the city of San Jose and San Jose State University decided to pursue the joint library option. An unusual combination of …

Partition Noise Extraction Using Tcad Simulations, Carol Cui Lan Lin

Master's Theses

As Complementary Metal Oxide Semiconductor (CMOS) technology scales down,

partition noise may start to play a bigger role in reducing the signal-to-noise ratio (SNR)

in sample-and-hold circuits and other capacitive sensing circuits that reset the voltage

across a capacitor. Previous studies on partition noise lack a reliable and accurate

measurement method to quantify partition noise. In our study, we have developed a

method using Technology Computer Aided Design (TCAD) simulations to estimate

partition noise. Through simulation, we determined the transistor dimensions and sense

capacitance required to measure partition noise. Furthermore, we designed a test circuit

based on our simulation results …

Stress And Coping Due To Global Virtual Teamwork, Irina Alexandra Shargo

Master's Theses

Global virtual teams (GVTs), project teams composed of individuals working across time and space via electronic platforms, are becoming increasingly commonplace in most organizations today and in global organizations specifically. The aim of this study was to explore issues employees experienced when working virtually in GVTs in order to develop recommendations for addressing those issues and encouraging solutions to benefit the employees, teams, and organizations as a whole. This paper presents findings from 27 interviews on coping and strain reactions to participation in intercultural computer-mediated communication (CMC). Analyses of the qualitative data suggest that intercultural training were helpful in reducing …

Electroless Deposition Of Plasmonic Nanostructures On Star Polymer Templates, Melia Tjio

Master's Theses

As an alternative technique, electroless deposition is gaining interest due to its simplicity (solution-based process, no complex instrumentation), economical aspect, and effectiveness to form certain desired film thicknesses and morphologies on a wide variety of substrates. This work describes the use of water-soluble, polyvalent star polymer templates to form spontaneous self-limiting monolayers on complimentary functionalized substrates that act as efficient adhesion layers for the electroless deposition of thin gold films. The resulting gold films display outstanding thickness control, uniformity, reproducibility, and plasmon resonance generation, as evaluated by Rutherford backscattering spectroscopy (RBS), surface plasmon resonance (SPR) spectroscopy, and atomic force microscopy …

Planet Building: A Case Study Of Corporate Sustainability For A Globalized World, Darci L. Arnold

Master's Theses

With the increasing complexities of a globalized 21st-century world, the growing power of industry clusters makes corporations important actors in designing sustainable development strategies. This thesis presents an applied case study at CB Richard Ellis (CBRE) as the company designed and launched its award-winning Sensible Sustainability platform. The research was conducted to determine how a large multinational company could create a business case for sustainability, and the results illustrate that value exists for firms engaged in sustainability initiatives.

CBRE's initial no-cost and low-cost activities resulted in increased operational efficiencies and lower costs. Over the course of the research period, the …

Implementation Of Risk Management In The Medical Device Industry, Rachelo Dumbrique

Master's Theses

This study looks at the implementation and effectiveness of risk management (RM) activities in the medical device industry. An online survey was distributed to medical device professionals who were asked to identify RM-related activities performed during the device life cycle. RM activities and techniques included Establishing Risk Acceptance Criteria, Hazard Identification, Human Factors/Usability, Fault Tree Analysis (FTA), Design Failure Mode and Effects Analysis (DFMEA), Process Failure Mode and Effects Analysis (PFMEA), Hazard and Operability Study (HAZOP), Hazard Analysis and Critical Control Point (HACCP), Risk Benefit Analysis, and Risk Assessment of Customer Complaint. Devices were identified by type (therapeutic, surgical/clinical tools, …

Inelastic Analysis Of Steel Moment Resisting Frames In Light-Framed Wood Buildings, Matthew Knutsen

Master's Theses

A preliminary quantitative analysis of steel moment resisting frames as the lateral force-resisting system for light-framed wood buildings was completed to identify issues requiring more advanced study. A two-story prototype building was evaluated. The lateral force-resisting system of the building contains intermediate steel moment frames with reduced beam section (RBS) connections, wood glulam collectors, and wood structural sheathing diaphragms. Building configuration and cross-sectional properties were assumed based on visual observation and typical design standards for local construction. A simplified pushover analysis and a traditional nonlinear pushover analysis were performed on the typical moment frame. It was determined that a total …

Hybrid Rfid-Based System Using Active Two-Way Tags, Girish N. Jadhav

Master's Theses

Ultra High Frequency (UHF) Radio Frequency Identification (RFID) is a promising technology that has experienced tremendous growth by revolutionizing a variety of industry sectors and applications, such as automated data management, the tracking of a specified object, highway toll collection, library inventory tracking, multi-level asset tracking, and airport baggage control. For many RFID applications, it is desired to maximize the operating distance or read range.

This thesis proposes a design of an analog front-end architecture and the baseband controller for a Class-4 Active Two-Way (C4-ATW) RFID tag in order to maximize or increase the tracking range by implementing a tag-hopping …

In Search Of The Creative Scientific Personality, Maya Grosul

Master's Theses

This study investigates whether personality is a valid predictor of creativity in science above and beyond demographic characteristics, such as career age, gender, and scientific discipline. Creativity is an act of making something new, original, and useful. Creative achievement in science is the personal ability to generate original, useful, and adaptive scientific theories, research methods, or empirical findings. Personality characteristics can operate as valid predictors of creative achievement in science. This study surveyed 145 scientists throughout the United States. Total creativity index was computed by standardizing and summing the total number of publications, total number of citations, h-index, and Soler's …

Establishing Community And Research Trust In Public Health Using Service-Oriented Architecture (Soa), Juanita Hun Mah

Master's Theses

One of the major challenges of community-based research is recruitment of community members who will participate in clinical trials, continue for the duration of the trial, and provide accurate sensitive personal information. This challenge can be overcome by establishing greater trust between researchers and communities.

This study focuses on a system to address trust issues between the San Jose Hispanic community and clinical researchers. It describes a methodology for translating non-functional wants and needs into technical requirements that are used as input to a Service-Oriented Architecture (SOA) approach to design a solution. Unlike a typical SOA that is derived from …

Applications Of Boundary Value Problems, Annie Nguyen

Master's Theses

In this thesis, we solved the Saint-Venant's torsion problem for beams with different cross sections bounded by simple closed curves using various methods. In addition, we solved the flexure problem of beams with certain curvilinear cross sections. The first method was derived by Bassali and Obaid. We focused on cross sections bounded by hyperbolas, circular groves, lemniscate of Booth, and sectorial cross sections. The second method used Tchebycheff polynomials to solve the torsion problem corresponding to the circle and ellipse. The third method used conformal mapping to derive the solution of different cross sections bounded by curvilinear edges. The flexure …

An Abridged History Of The Orange, Robert Aho

Master's Theses

The orange is more than a fruit that one can purchase at a supermarket or pick from the tree in the yard. The fruit started as an object of exoticism. It was later transformed into a symbol of purity. Eventually the orange became a vehicle for humanity to demonstrate its mastery over nature. In modern society, oranges are the foundation of enterprises, ones that sustain entire regions of the world. This thesis presents a series of essays, each using aspects of art history and geography, to describe the history of the orange. The intention of this thesis is to introduce …