Digital Commons Network^™

A Descriptive Performance Model Of Small, Low Cost, Diskless Beowulf Clusters, Curtis R. Nielson

Theses and Dissertations

Commodity supercomputing clusters known as Beowulf clusters, have become a low cost alternative to traditional supercomputers. Beowulf clusters combine inexpensive computers and specialized software to achieve supercomputing power. The processing nodes in a diskless Beowulf cluster do not have a local hard disk unlike the nodes in most commodity clusters. Research has provided performance information for diskless clusters built with expensive, high performance equipment. Beowulf clusters use commodity off-the-shell hardware, and little information is available about their performance. This research includes the construction of several diskless Beowulf clusters. Using the NAS Parallel Benchmarks, the performance of these clusters was measured. …

Prehistoric Timberline Adaptations In The Eastern Uinta Mountains, Utah, Michelle Knoll

Theses and Dissertations

Excavations at a high altitude archaeological site (3350 m) in the eastern Uinta Mountains, Utah, uncovered at least three ephemeral brush structures. These temporary timberline dwellings are the highest structures excavated in Utah to date. The periods of occupation range from the early Fremont period to the post-contact era. It is believed that the Fremont occupations are logistical in nature, possibly representing male hunting parties. Logistical camps imply a departure from, and return to, a residential camp. Ethnographic studies show that most residential camps are located within proximity to culinary plants to facilitate collection by women. In the Uinta Mountains, …

Amos Through Malachi: Major Teachings Of The Twelve Prophets, Blair G. Van-Dyke, D. Kelly Ogden

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

What Every Latter-Day Saint Should Know About Islam, Brian M. Hauglid, Kent P. Jackson

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

Vol. 04 No. 2 Religious Educator, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

End Matter, Religious Educator

Religious Educator: Perspectives on the Restored Gospel

No abstract provided.

A Study Of Radiofrequency Cardiac Ablation Using Analytical And Numerical Techniques, Ryan Todd Roper

Theses and Dissertations

Studies on radiofrequency (RF) ablation are often aimed at accurately predicting tissue temperature distributions by numerical solution of the bioheat equation. This thesis describes the development of an analytical solution to serve as a benchmark for subsequent numerical solutions. The solution, which was obtained using integral transforms, has the form of a surface integral nested within another surface integral. An integration routine capable of evaluating such integrals was developed and a C program was written to implement this routine. The surface integration routine was validated using a surface integral with a known analytical solution. The routine was, then, used to …

Epidemiology Of Ustilago Bullata Berk. On Bromus Tectorum L. And Implication For Biological Control, Toupta Boguena

Theses and Dissertations

The seedling-infecting pathogen Ustilago bullata Berk. is a naturally occurring biological control agent for cheatgrass (Bromus tectorum L.). The effects of temperature and nutrients on pathogen teliospore germination behavior and the effects of temperature on host seed germination were examined. The effects of temperature on sporidial proliferation, host infection in a temperature-controlled environment and in a field setting for eight populations were investigated. The infection success of Ustilago bullata on Bromus tectorum in cultivated fields as a function of seeding date, inoculation method, inoculum density, supplemental watering, and litter was also investigated. Teliospores germinated faster on potato dextrose agar than …

Incorporating Functionally Graded Materials And Precipitation Hardening Into Microstructure Sensitive Design, Mark Edward Lyon

Theses and Dissertations

The methods of MSD are applied to the design of functionally graded materials. Analysis models are presented to allow the design of compliant derailleur for a case study and constraints are placed on the design. Several methods are presented for relating elements of the microstructure to the properties of the material, including Taylor yield theory, Hill elastic bounds, and precipitation hardening.

Applying n-point statistics to the MSD framework is also discussed. Some results are presented for the information content of the 2-point correlation statistics that follow from the methods used to integrate functionally graded materials into MSD.

For the compliant …

Design And Analysis Of End-Effector Systems For Scribing On Silicon, Bennion Rhead Cannon

Theses and Dissertations

This thesis investigates end-effector systems used in a chemomechanical scribing process. Chemomechanical scribing is a method of patterning silicon to selectively deposit a monolayer of material on the surface of the silicon. This thesis details the development of a unique end-effector for chemomechanical scribing using a compliant mechanism solution. The end-effector is developed to scribe lines that have uniform geometry and produce less chipping on the surface of the silicon. The resulting scribing mechanism is passively controlled, has high lateral stiffness, and low axial stiffness. The mechanism is analyzed using the pseudo-rigid-body model and linear-elastic beam method to determine the …

Front Matter/ Webwise, Marriage &. Families

Marriage and Families

No abstract provided.

The Rise And Fall Of Programmed Instruction: Informing Instructional Technologists Through A Study Of The Past, Jason K. Mcdonald

Theses and Dissertations

Instructional technologists have recently been called upon to examine the assumptions they hold about teaching and learning, and to consider how those assumptions can affect their practice of the discipline. This thesis is an examination of how the assumptions instructional technologists hold can result in instructional materials that do not accomplish the original goals the developers set out to achieve. I explored this issue by examining the case study of programmed instruction, an educational movement from the mid-20th century that promised to revolutionize education but never lived up to its potential. Programmed instruction was heavily influenced by the assumptions of …

Latter-Day Saints In Popular National Periodicals 1970-1981, Adam H. Nielson

Theses and Dissertations

The public image of The Church of Jesus Christ of Latter-day Saints is the product of several factors. This thesis investigates that image as presented in national periodicals from 1970 to 1981. During this time "Mormons" and "Mormonism" was a popular topic as the religion gained notoriety, and as an awareness of its peculiar beliefs and practices increased.

The rationale for using national magazines to assess public image is the assumption that they "reflect prevailing points of view" and help "formulate public opinion." Since popular attitudes are one of the factors that influence how the Church is accepted in the …

Modeling Electromagnetic Wave Propagation In Electrically Large Structures, Jon Wallace

Theses and Dissertations

Existing unified numerical electromagnetic methods are often unable to analyze electrically large structures due to the amount of memory and processing power required, necessitating approximate analyses with limited applicability. In this research a hybrid modeling methodology is adopted to solve these complex problems more efficiently than unified numerical methods and more accurately than analytical methods. Electromagnetic modeling problems are divided into two or more levels of scale. Each level analyzes a specific level of detail and only promotes the required information to the next level. The method is demonstrated by successful application to three important problems: (1) remote sensing of …

The Formative Evaluation Of A Family Life Education Website, Brynn Marie Steimle

Theses and Dissertations

Hundreds of family life education (FLE) websites are now available on the Internet, allowing individuals and families unprecedented access to FLE information. Evaluation is critical to ensuring the quality of and improving FLE websites, yet few FLE website evaluations have been conducted. This study formatively evaluated a new family life education website, called Forever Families (http://www.foreverfamilies.net or http://foreverfamilies.byu.edu), assessing website utilization using Web-based software, and receiving visitor feedback through the use of an online survey. Quantitative survey items assessed knowledge gains, how interesting the content was, usefulness, attractiveness, ease of use of the website, whether or not the site met …

Analysis And Design Of Surface Micromachined Micromanipulators For Out-Of-Plane Micropositioning, Kimberly A. Jensen

Theses and Dissertations

This thesis introduces two ortho-planar MEMS devices that can be used to position microcomponents: the XZ Micropositioning Mechanism and the XYZ Micromanipulator. The displacement and force relationships are presented. The devices were fabricated using surface micromachining processes and the resulting mechanisms were tested. A compliant XYZ Micromanipulator was also designed to reduce backlash and binding. In addition, several other MEMS positioners were fabricated and tested: the Micropositioning Platform Mechanism (MPM), the Ortho-planar Twisting Micromechanism (OTM), and the Ortho-planar Spring Micromechanism (OSM).

Real-Time Adaptive Cancellation Of Satellite Interference In Radio Astronomy, Andrew Joseph Poulsen

Theses and Dissertations

Radio astronomy is the science of observing the heavens at radio frequencies, from a few kHz to approximately 300 GHz. In recent years, radio astronomy has faced a growing interference problem as radio frequency (RF) bandwidth has become an increasingly scarce commodity. A programmable real-time DSP least-mean-square interference canceller was developed and demonstrated as a successful method of excising satellite down-link signals from both an experimental platform at BYU, and the Green Bank Telescope at the National Radio Astronomy Observatory in West Virginia. A performance analysis of this cancellation system in the radio astronomy radio frequency interference (RFI) mitigation regime …

The United States In El Salvador: 1979-1992 Success Through The Eyes Of The Diplomats, David Jeffrey Mouritsen

Theses and Dissertations

The United States made El Salvador one of its top priorities in the 1980s as the communist threat from the Soviet Union made its way to El Salvador. The Marxist-Leninist guerrilla group, the Farabundo Martí­ National Liberation Front (FMLN), was supported by the Soviet Union via Cuba and became the target of the hard line politicians that ruled in El Salvador.

In order to combat the guerrilla movement, the United States structured its policy around national security to justify intervention in El Salvador. The three main points of the policy were to prevent a left-wing takeover by the communist-backed FMLN, …

Multienergetic External-Beam Pixe As A Means Of Stydying The Surface Enrichment Effect In Coins, Scott Evans Perry

Theses and Dissertations

This thesis paper examines the feasibility of using external-beam PIXE to study the surface enrichment effect in metal artifacts. By varying the energy of the incident proton beam, we penetrated the artifact's surface to different levels and were able to produce a depth profile of the elemental composition of the sample. In this study, the sample set we chose to examine consisted of ancient and modern coins. This paper first describes the surface enrichment effect and theoretically how PIXE can be used to study it. It then details the construction of the components of the external-beam setup. Many of the …

Ruling Powers, Scot A. Hanson

Theses and Dissertations

While the fantasy genre is one of the most widely read modes of writing, literary criticism and academic discussion of the genre takes place at a much lower level. This imbalance has developed in part because of a misconception that fantasy genre writings cannot accomplish significant, literary purposes. This thesis first offers an argument for why the fantasy genre should receive more attention in scholarly circles, then presents an excerpt of a fantasy novel. The argument draws from the limited amount of existing criticism to highlight the strengths of the fantasy genre, building a case that, in most respects, works …

Reducing Learning Object Inspection/Evaluation Costs In Instructional Design, Larry Lynn Seawright

Theses and Dissertations

A widely employed instructional design approach, the ADDIE (Analysis, Design, Development, Implementation, Evaluation) model, has been one of the most popular and well documented instructional design models (Wilson, Jonassen, and Cole, 1993) for decades. Despite its widespread use, Thiagarajan, a leading instructional technologist, asserts that ADDIE, as an instructional design approach, is comparable to an outdated 1950's manufacturing model (Zemke, 2002). Since the 1950's, manufacturing has evolved, focusing initially on reducing inspection or evaluation costs and later on shifting these cost improvements throughout the organization. Just as manufacturing models and their application have evolved, service operations models such as instructional …

Development Of An Advanced Stem Heating Model, Joshua L. Jones

Theses and Dissertations

A new one-dimensional heat conduction model for predicting stem heating during fires is presented. The model makes use of moisture and temperature dependent thermal properties for bark and wood. Also, the thermal aspects of the processes of bark swelling, desiccation, and devolatilization are treated in an approximate fashion. Simulation with a surface flux boundary condition requires that these phenomena be accounted for. Previous models have used temperature-time boundary conditions, which prevents them from being directly coupled to fire behavior models. This model uses a flux-time profile for its boundary condition, making it possible to eventually couple it to fire behavior …

Efficacy Of Speed Monitoring Displays In Increasing Speed Limit Compliance In Highway Work Zones, Jeanne Marie Bowie

Theses and Dissertations

Safety in highway work zones has become a concern among Departments of Transportation (DOTs) throughout the country as the highway network has begun to age and more maintenance and construction work has been necessary. Safety in highway work zones is more compromised than in other areas for two reasons. First, the construction workers are near traveling vehicles as they perform their already dangerous work, increasing the risk of an accident. Second, the highway user is at increased risk because of the increase in roadside obstacles, because other vehicles are more likely to act in unpredictable ways (such as sudden braking …

A Long-Awaited Visit: President Heber J. Grant In Switzerland And Germany, 1937, Richard Neitzel Holzapfel, Marc Alain Bohn

BYU Studies

In 1937, just two years before Hitler invaded Poland, President Heber J. Grant made a memorable journey from Salt Lake City to Europe (fig. 1). President Grant had served as president of the European and British Missions from 1903 to 1906 and was now returning to Europe as prophet of the Church. He was the second Church president to visit Europe while serving in that capacity. His predecessor, Joseph F. Smith, visited Europe in 1906 and again in 1910.

Mormons And The Media, 1898-2003: A Selected, Annotated, And Indexed Bibliography (With Suggestions For Future Research), Sherry Baker, Daniel Stout

BYU Studies

Print, electronic, and other forms of communications media have been consistently perceived and characterized by leaders of The Church of Jesus Christ of Latter-day Saints as tools to assist in spreading and gospel message throughout the world. President Spencer W. Kimball said, "Technology will help spread the gospel.... We shall use the inventions the Lord has given us to awaken interest and acquaint people of the world with [gospel] truths." More recently, President Gordon B. Hinckley said, "The Lord has inspired skilled men and women in developing new technologies which we can use to our great advantage in …

Front Matter, Byu Studies

BYU Studies

No abstract provided.

Index, Byu Studies, Volume 42, Byu Studies

BYU Studies

No abstract provided.

Identification Of Macro- And Micro-Compliant Mechanism Configurations Resulting In Bistable Behavior, Brian D. Jensen

Theses and Dissertations

The purpose of this research is to identify the configurations of several mechanism classes which result in bistable behavior. Bistable mechanisms have use in many applications, such as switches, clasps, closures, hinges, and so on. A powerful method for the design of such mechanisms would allow the realization of working designs much more easily than has been possible in the past. A method for the design of bistable mechanisms is especially needed for micro-electro-mechanical systems (MEMS) because fabrication and material constraints often prevent the use of simple, well-known bistable mechanism configurations. In addition, this knowledge allows designers to take advantage …

A Self-Retracting Fully-Compliant Bistable Micromechanism, Nathan D. Masters

Theses and Dissertations

The purpose of this research is to present a class of Self-Retracting Fully-compliant Bistable Micromechanisms (SRFBM). Fully-compliant mechanisms are needed to overcome the inherent limitations of microfabricated pin joints, especially in bistable mechanisms. The elimination of the clearances associated with pin joints will allow more efficient bistable mechanisms with smaller travel. Small travel, in a linear path facilitates integration with efficient on-chip actuators. Tensural pivots are developed and used to deal with the compressive loading to which the mechanism is subject. SRFBM are modeled using the Pseudo-Rigid-Body Model and finite element analysis. Suitable configurations of the SRFBM concept have been …

Iteration Methods For Approximating The Lowest Order Energy Eigenstate Of A Given Symmetry For One- And Two-Dimensional Systems, Chad Everett Junkermeier

Theses and Dissertations

Using the idea that a quantum mechanical system drops to its ground state as its temperature goes to absolute zero several operators are devised to enable the approximation of the lowest order energy eigenstate of a given symmetry; as well as an approximation to the energy eigenvalue of the same order.