Digital Commons Network^™

A System For Measuring The Lift And Drag Forces Of A Spinning Golf Ball Held Fixed Within A Wind Tunnel, Ryan R. Miller

Master's Theses

A system was designed, built and tested in order to test the aerodynamic properties of a standard golf ball in a wind tunnel manufactured by ELD, Inc. model 406(B). The system consists of a rotating shaft, on which the golf ball is attached, connected to a two-axis force transducer. Additionally, an automated data acquisition system was built for enhanced precision of measurements. Data for wind speeds up to 160 ft/s and rotational speeds up to 8,600 rpm were obtained and analyzed. The purpose of the designed apparatus was to allow for studies to better understand the lift and drag coefficients …

Characterization Of A Viscoelastic Response From Thin Metal Films Deposited On Silicon For Microsystem Applications, Steven L. Meredith

Master's Theses

Understanding the mechanisms that control the mechanical behavior of microscale actuators is necessary to design an actuator that responds to an applied actuation force with the desired behavior. Micro actuators which employ a diaphragm supported by torsional hinges which deform during actuation are used in many applications where device stability and reliability are critical. The material response to the stress developed within the hinge during actuation controls how the actuator will respond to the actuating force. A fully recoverable non-linear viscoelastic response has been observed in electrostatically driven micro actuators employing torsional hinges of silicon covered with thin metal films. …

Effectiveness Of Thermal Oxidation In Relation To Anterior Cervical Plates, Katherine A. Miyashiro

Master's Theses

Ti-6Al-4V anterior cervical plates (ACP) are used in spinal fusion surgeries to fixate cervical vertebrae during graft adhesion. However, documented cases of implant failure and the potential for ACP corrosion raise concerns regarding any degradation of material resulting from extended implantation. In addition, abrasion during implantation may damage a section of the protective oxide layer, potentially exposing surrounding tissues to the harmful effects of bare titanium, aluminum, and vanadium. Thermal oxidation has been shown to improve corrosion-resistance and wear-resistance, depending on temperature and time. To quantify the attributes of the thermally grown oxide layer, Ti-6Al-4V coupons underwent thermal oxidation treatments …

Programming And Conceptual Design Using Building Information Modeling, Mary-Alice Avila

Master's Theses

This thesis explores the benefits of using Building Information Modeling (BIM) during the programming and conceptual design phase of a project. The research was based on a case study undertaken dealing with the decisions and assumptions made during the design phases of the Center for Science at Cal Poly San Luis Obispo. The project team used a traditional approach to project plan development. The finding of this study was that the project process would have greatly benefited utilizing BIM tools and a collaborative team approach in the programming and conceptual design phase. Because decisions made early in the project have …

Three-Dimensional Target Modeling With Synthetic Aperture Radar, John R. Hupton

Master's Theses

Conventional Synthetic Aperture Radar (SAR) offers high-resolution imaging of a target region in the range and cross-range dimensions along the ground plane. Little or no data is available in the range-altitude dimension, however, and target functions and models are limited to two-dimensional images. This thesis first investigates some existing methods for the computation of target reflectivity data in the deficient elevation domain, and a new method is then proposed for three-dimensional (3-D) SAR target feature extraction.

Simulations are implemented to test the decoupled least-squares technique for high-resolution spectral estimation of target reflectivity, and the accuracy of the technique is assessed. …

Ergonomics : A Focus On The Prince George County, Va Emergency Operations Center Workstations, John Leach

Master's Theses

This research paper examines the current ergonomic characteristics of the Prince George County Emergency Operations Center Workstations. Further, the research attempts to answer the following question: How do the Prince George County Emergency Operations Center Workstations compare with conventional wisdom, and literature on the topic of workstation ergonomics?

The Unjust Selection Of Justice Professionals: Balancing Fairness For Police Officer Applicants And The Potential Citizens They Will Serve, Robert W. Boyle

Master's Theses

This paper examines the effects on the community when its police officers are held to different physical standards based upon their sex. Through a Platonic analysis of the modern day "guardians of the city," it can be seen that the community is deprived of the strongest and best police force when the department compensates individuals based upon a "weakness" that thier class of applicants possesses. This process proves to be unfair to both the applicants and to the citizens they may subsequently serve.

Nano-Mechanics Of Cartilage Glycosaminoglycans Using Molecular Dynamics Methods, Kevin Neil Hendrickson

Master's Theses

Articular Cartilage (AC) is the main load carrying material in synovial joints {Hamerman, 1962} and degeneration of AC can cause pain in the form of arthritis. Current work is centered on the method of replacing damaged cartilage inside the body (in vivo) with tissue engineered outside the body (ex vivo) {Temenoff, 2000}. In order to engineer tissue ex vivo similar to the native tissue in structure and function there must be a comprehensive understanding of the mechanical properties of AC. This work focuses on the study of glycosaminoglycans (GAGs), a molecule known to be primarily responsible for the compressive stiffness …

Management Of Sport-Related Concussions By Certified Athletic Trainers, Mark J. Tiemeier

Master's Theses

No abstract provided.

Comparing Generation X To Generation Y On Work-Related Beliefs., Susana Fernandez

Master's Theses

A new generation of employees with new expectations is entering the workplace. They are known by many names, but most will recognize them as the Millennials or Generation Y (Gen Y). With many Gen Y members already in the workforce, managers are likely to be required to deal with the generational differences that appear to exist among employees. Given that Gen Y members are likely to work closely with Gen X members, the present study explored possible differences between Gen X and Gen Y on their work-related beliefs.

"Firing The Pigskin Real Right": Media Representations Of Simpson And Romo., Lindsey M. Eliopulos

Master's Theses

The purpose of the study was to examine the media's representations of sport-celebrity couple singer-actress, Jessica Simpson and Dallas Cowboys Quarterback, Tony Romo. One hundred magazine and 100 newspaper articles published between December 17, 200, that coincided with the first publicized notion of the "Jessica Simpson jinx" and April 15, 2009, were qualitatively analyzed. The investigation revealed the prevailing dominant ideologies of patriarchal structures, traditional gender roles, hegemonic masculinity and deviance, while underscoring the mass media's ubiquitous characteristics. The literature emphasized the mass media's representation of the celebrity and the media's habitual employment of gossip and rumor linguistics to frame …

Intrusion Detection And Prevention System: Cgi Attacks., Tejinder Aulakh

Master's Theses

Over the past decade, the popularity of the Internet has been on the rise. The Internet is being used by its clients to access both static and dynamic data residing on remote servers. In the client-server interaction, the client asks the server to provide information, and, in addition, the server may also request that clients provide information such as in "web forms." Therefore, the Internet is being used for many different purposes which also include the web servers collecting the information from the clients. Consequently, attacks on the web servers have been increasing over the years. Due to the fact …

Offshoring Effectiveness: Measurement And Improvement With Optimization Approach., Dip Biswas

Master's Theses

This study takes a refreshing look at IT outsourcing from a vendor's perspective and discusses best practices required to effectively manage offshore business needs and offshoring effectiveness. We have conducted a detailed investigation to learn why outsourcing ventures fail, how to effectively measure up to service provider capability, and how to deliver strategic value to the end customer. Extant literature does not talk about the vendor's issues and problems in outsourcing, and our investigation emphasized the vendor's perspective on offshoring strategy and offshore resource effectiveness as the two important differentiators in a make-or-buy decision. Measurement metrics for each of the …

Effects Of Wall Compliance On Pulsatile Flow Attenuation In Microchannels., Jing-Keat Goh

Master's Theses

The attenuation of pulsatile flow through highly compliant microchannels has been investigated. The expansion of a compliant microchannel subjected to pulsatile flow is able to store fluid temporarily and thereby reduce the peak-to-peak magnitude of flow fluctuation. In a highly compliant microchannel, the microchannel expansion reduces its hydraulic resistance and its associated pressure drop. For a similar inlet pressure condition, the pressure drop along the length of a more compliant microchannel is lower than a rigid microchannel. Therefore, greater net pressure is available to deform the microchannel wall. So the hypothesis of this study is the coupled relationship between higher …

Examination Of The Factors That Predict Job Satisfaction., Amani Shoman

Master's Theses

The purpose of this study was to determine the predictors of job satisfaction among three departments within an organization. The study used five predictors: leadership/top management communication with subordinates, feedback received from one's supervisor, training opportunities for employees, career opportunities within the company, and teamwork or cooperation among employees. Using data from 608 participants, the present study examined the relationships between each of these five predictors and job satisfaction. Consistent with hypotheses, each of these predictors was significantly related to job satisfaction. Moreover, leadership/top management communication with subordinates (except for one department surveyed), career opportunities within the company, and teamwork …

Enhancing Spammer Detection In Online Social Networks With Trust-Based Metrics., Alexander J. Murmann

Master's Theses

As online social networks acquire larger user bases, they also become more interesting targets for spammers. Spam can take very different forms on social Web sites and cannot always be detected by analyzing textual content. However, the platform's social nature also offers new ways of approaching the spam problem. In this work the possibilities of analyzing a user's direct neighbors in the social graph to improve spammer detection are explored. Special features of social Web sites and their implicit trust relations are utilized to create an enhanced attribute set that categorizes users on the Twitter microblogging platform as spammers or …

Urban Creek Restoration, Adobe Creek, Santa Clara County, California., Chris D. Pilson

Master's Theses

Increased urban development has encroached upon and impacted Adobe Creek by constricting the route and volume of flow to predetermined corridors, often irrespective of the original creek morphology. The headwaters geology and human influences have contributed to the creek's disequilibrium. Channelization and instream modifications have segmented the creek system limiting the transfer of changes through the system. Located east of the San Andreas fault (SAF) in the Franciscan Complex, Adobe Creek flows from the eastern foothills of the Santa Cruz Mountains and empties into the San Francisco Bay.

Information Management Professionals And Programs In U.S. Architecture Firms., Lynne M. Kemmer

Master's Theses

This research study identifies an active population of librarians and information management (IM) professionals and describes library and IM programs in architectural design firm offices in the United States. The levels of education, job titles, and duties of the professionals managing and assisting with the libraries and IM programs are clarified. Designated spaces, budgets, resources, systems, services, evaluation, and communication methods for the libraries and IM programs, are determined. The information needs of management and employees in the architecture firms are specified. The support materials the librarians and IM professionals utilize to administer their library and IM program's resources and …

Dodge-Romig Sampling Plans: Misuse, Frivolous Use, And Expansion For Usefulness., Avik Ganguly

Master's Theses

The Dodge-Romig plans and the Military Standard 105 Plans are the most popular published sampling plans covered in detail in many standard textbooks on statistical quality assurance such as Introduction to Statistical Quality Control by Douglas C. Montgomery. In this thesis, we focus on Dodge-Romig AOQL plans. The Dodge-Romig AOQL plans are designed to minimize the average total inspection (ATI) for a given AOQL and a specified process average. It is argued that the Dodge-Romig plans as currently tabulated (particularly in the standard publications or textbooks on acceptance sampling), are not useful. However, they can be made useful if the …

The Personality And Mental Health Of Physical And Social Scientists., Chad Richard Kempel

Master's Theses

The decision to pursue a career as a scientist and the likelihood of becoming successful is dependent upon a variety of factors, including a unique blend of personality characteristics and mental health. Being either thing- or people-oriented may also be related to whether or not an individual chooses to travel down either the Science-Technology-Engineering-Math (STEM) or Social Science path. In order to examine these relationships, 214 academic scientists throughout the United States were assessed on a battery of personality and mental health measures. As was expected, social scientists scored higher than STEM scientists in general on a measure of extraversion. …

Barriers To Mitigation: Incentives And The Influence Of Social Networks., Crystal Paul

Master's Theses

This study is an expansion of previous research and a pilot study conducted on the barriers to hazard mitigation. Using a sample of 235 American Red Cross staff members and volunteers, factors such as the barriers and incentives around earthquake mitigation were assessed. Demographic characteristics and threat perceptions were also measured and compared to respondents' mitigation activities. While few demographic characteristics could be related to mitigation activity overall, findings were consistent with information found in the literature review and the pilot study. Barriers to mitigation were generally cost, time required, lack of information, and a feeling that it was unnecessary …

Robot Assisted Herding, Pinky Thakkar

Master's Theses

This thesis addresses issues relating to the development of a robotic capability to assist a human in performing a complex task. It describes research and experiments involving a robot that assists a human to herd an animal. The novel focus of this work is that the robot is able to perceive the human's intentions by interpreting the human's movements without any explicit communication from the human. Furthermore, the robot is able to detect if the human is absent or unable to herd, and in that case, it herds the animal autonomously. A herding framework is developed based on low-stress herding …

Marine Mammal Response To Ecosystem Variability In Monterey Bay, California., Julia Burrows

Master's Theses

The coastal upwelling ecosystem near Monterey Bay, California is an extremely productive, yet variable, ecosystem and an important foraging area for mobile, apex predators, such as marine mammals. Longer-term studies are required to better understand how marine mammals respond to temporal environmental variability; however, few of these studies exist. We conducted monthly shipboard line-transect surveys in Monterey Bay from 1997 to 2007, concurrent with hydroacoustic and oceanographic sampling. Twenty-two species of marine mammals were identified, and monthly and annual densities were calculated for the 12 most commonly sighted species. Densities varied among years, whereas species richness remained relatively constant. Marine …

Design And Implementation Of Embedded Adaptive Controller Using Arm Processor., Hoan The Nguyen

Master's Theses

This thesis is concerned with development of embedded adaptive controllers for industrial applications. Many industrial processes present challenging control problems such as high nonlinearity, time-varying dynamic behaviors, and unpredictable external disturbances. Conventional controllers are too limited to successfully resolve these problems. Therefore, the adaptive control strategy, an advanced control theory, is applied to overcome deficiencies of the conventional controllers.

Active Vibration Control Of A Flexible Beam., Shawn Le

Master's Theses

There has been tremendous growth in the study of vibration suppression of smart material structures with lead zironate titanate (PZT) material by the control engineering community. This thesis considers a cantilever beam with bonded piezoceramic actuators and a sensor for the study of vibration control. The flexible beam dynamic model is first derived analytically according to the Euler Bernoulli Beam Theory. The first three mode shapes and natural frequencies of the beam are constructed analytically and verified with finite element analysis. The validity of the smart structure was experimentally verified. The natural frequencies and damping parameters for each mode were …

Effects Of Telepresence Light Height And Ambient Light On Glare And Appearance, James P. Beno

Master's Theses

No abstract provided.

Feature Extraction From High Resolution Digital Elevation Models Of Mars, Leslie E. Keely-Meindorfer

Master's Theses

No abstract provided.

A Unified Resource Platform For The Rapid Development Of Scalable Web Applications, Russell Palmiter

Master's Theses

This thesis presents Web Utility Kit (WUT): a platform that helps to simplify the process of creating modern web applications. It addresses the need to simplify the web development process through the creation of a hosted service that provides access to a unified set of resources. The resources are made available through a variety of protocols and formats to help simplify their consumption. It also provides a uniform model across all of its resources making multi-resource development an easier and more familiar task. WUT saves the time and cost associated with deployment, maintenance, and hosting of the hardware and software …

Lean Erp Systems: Existence And Viability In Today's Manufacturing Industry, Miroslav Djuric

Master's Theses

This thesis evaluates the existence and viability of lean ERP systems in today’s manufacturing industry. Results from the research show that current practitioners of lean – who also utilize ERP systems – do not have a strong enough link between the two to consider their ERP systems, and overall organizations, as being truly lean.

Few articles and research papers in today’s body of knowledge contain information on the concept of lean ERP. A survey, sent to numerous industry professionals and posted on lean manufacturing websites, provided the results necessary for statistical analysis. The conclusions obtained from this survey analysis provided …

Analysis And Design Of Continuous Input Current Multiphase Interleaved Buck Converter, Sean Michael Zich

Master's Theses

The power requirements for microprocessors have been increasing per Moore's Law. According to International Technology Roadmap (ITRS), Voltage Regulator Module (VRM) for microprocessors will be about 200 W at 1 V output in 2010. With the VRM’s topology of synchronous buck, serious technical challenges such as small duty cycle, high switching frequencies, and higher current demands, contribute to decreased power density and increased cost.

This thesis proposes a Continuous Input Current Multiphase Interleaved Buck topology to solve the technical challenges of powering future microprocessors. This new topology is aimed to improve past topologies by providing continuous input current and improved …