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1
Chapman, Jana Lynn. "BYU Vocal Performance Database." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2146.
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The vocal performance database is a tool by which BYU vocal performance faculty and students may practice, assess, and review vocal performances, including practice juries, recitals, and end-of-semester juries. This document describes the process and results of designing, developing, implementing, and evaluating the vocal performance database. By using this tool, vocal performance professors are able to give faster, more quality feedback to students following the jury. Students are able to receive legible feedback from their professors in a timely manner.
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Duncan, Jana Lynn. "Group Flow in the BYU Animation Studio." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6451.
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This dissertation encompasses three articles concerning Sawyer's (2007) theory of group flow in the context of higher education, including a literature review, and two interpretive studies. In the literature review and in the first interpretive research article, the results of the research illuminated the applicability of themes of group flow in collaborative settings in higher education in themes of vision, ownership and contribution, and communication. The final article provides a description of the roles of student lead and professor in this environment and the unique ways that they may have encouraged those themes in the studio. The context for this study was the BYU Animation Studio, using video footage of students working in the computer lab, in their Daily meetings, and video interviews with students and professors in the program. The footage focused on one year of the senior project, with a core group of students coordinating efforts to create an animated short. Students involved in the senior film were mostly juniors and seniors coming from different academic departments, including Fine Arts, Engineering, and Computer Science. In the descriptive article, we gained further insights into the experience of group flow in a higher education setting. Several of the themes from the data resonated with the literature on group flow. Students working on the project had both project and people-oriented goals. They took initiative to solve problems and work through personal conflicts with group decisions, and made efforts to share their knowledge with other students. As group members communicated, they often validated and built off of others' ideas, putting the interests of the group above personal interests. In the same context, using the same methods, we were able to observe ways that student leads and teachers tried to enhance the group experience. Student leads and teachers made different contributions in that respect. Student leads contributed the actual project vision, breaking up the project into tasks for which students could volunteer and take initiative. Student leads also promoted friendship and communication within the group. Professors taught collaboration skills, and supported student initiatives. Professors also provided opportunities for students to collaborate across departments, while practicing collaboration between faculty members.
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Dobronsky, Sayan. "Aerodynamic Improvement of the BYU Supermileage Vehicle." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5677.
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The purpose of this thesis work was to design a new shape for the BYU Supermileage vehicle in order to improve its fuel efficiency. Computational Fluid Dynamics (CFD) was used to obtain the coefficient of drag (CD) and drag area of the current baseline vehicle at a Reynolds number of 1.6x10^6 and 8.7x10^5. Then a new shape was developed using mesh morphing software. The new shape was imported into the CFD program and the drag figures and airflow plots from the modified design were compared with the baseline vehicle. Scale models of the vehicles were also printed using a 3D printer in order to perform wind tunnel testing. The models were installed in the wind tunnel and the coefficient of drag and drag area were compared at a Reynolds number around 8.7x10^5.It was found from the CFD results that the new vehicle shape (labelled Model C) caused a 10.8% reduction in CD and a 17.4% reduction in drag area under fully laminar flow. Smaller drag reductions were observed when the flow was fully turbulent. From the wind tunnel comparisons, it was found that Model C reduced CD by 5.3% and drag area by 11.4%, while the fully laminar CFD results at Re = 8.7x10^5 showed that Model C reduced CD by 9.8% and drag area by 15.9%. Smaller drag reductions were again observed for fully turbulent flow. Thus in order to improve the aerodynamic performance, the current vehicle shape should be changed to match that of Model C, and laminar flow should be encouraged over as much of the wetted area as possible.
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Long, David G., Bryan Jarrett, David V. Arnold, and Jorge Cano. "BYU SAR: A Low Cost Compact Synthetic Aperture Radar." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/611615.
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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, NevadaSynthetic Aperture Radar (SAR) systems are typically very complex and expensive. They generate enormous quantities of data, requiring very high capacity data storage, transmission, and processing systems. We have developed an experimental SAR system with a very simple design which includes near-real-time onboard processing. This system is based on recent developments in low-cost, high-rate analog-to-digital (A/D) and digital-to-analog (D/A) data conversion systems. Most of the system is based on off-the-shelf components. A very simple RF subsystem is used. The system has been successfully operated from a moving surface vehicle and exhibits a range resolution of 2.5 m though this could be improved to 1.5 m at the expense of higher sidelobes. The four look azimuth resolution is 0.4 m. This paper describes the system as well as our plans for upgrading the system for aircraft operation and improved resolution.
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Simmons, Diena L. "Motivations and Gratifications for Selecting a Niche Television Channel: BYU Television." BYU ScholarsArchive, 2002. https://scholarsarchive.byu.edu/etd/5110.
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The growth of direct broadcast satellite television distribution to the home as a viable competitor to cable and terrestrial broadcast has fostered the availability of special interest or niche channels and therefore provided greater choice to the viewer. This study, based on uses and gratifications theory, examined the relationships among ritual and instrumental viewing motivations and satisfactions, viewer religiosity, and viewing attentiveness as they related to the selection of a niche television channel, Brigham Young University Television. The uses and gratification approach provides an appropriate framework for studying "media consumption, the interrelated nature of television user motives, and the relationships among viewing motives and viewing patterns" (Abelman, 1989, p. 57). Data was gathered by way of an online survey of non-random, self-selected BYU Television viewers. Participants answered 67 questions about their motives for choosing to view BYU Television and the gratifications they received from their viewing. The 596 valid responses to the survey were analyzed. The study results are in harmony with previous uses and gratifications studies examining ritual and instrumental viewing patterns. The data found positive relationships between instrumental viewing motives and instrumental viewing satisfactions, as well as instrumental viewing motives and viewing selectivity. There was no support for those hypotheses that dealt with the level of viewing attention as it related to religiosity or instrumental viewing motives. Future topics of study are suggested including the opportunity an expanded media universe provides to increase the depth and breadth of uses and gratification theory, as well as to study the role of niche television services in community building.
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Christensen, Kimberly Dawn Nielson. "Designing and Developing a Program to Promote the BYU Aims." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3418.
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This paper details the design and development of a self-directed character education program based on the Aims of a BYU Education. Specifically, the program was intended to meet the following objectives: (a) increase student awareness of the BYU Aims, (b) provide opportunities for students to recognize and understand principles of good character, (c) engage students in enriching application of character values, and (d) lay the foundation for lifelong learning, service, and good character. The design process followed a modified systematic approach and resulted with a pilot trial of the BYU Aims Program. The selection of design model, preliminary analyses, and formative evaluation appear to have particularly contributed to the success of the pilot. While participant feedback did suggest that involvement in the pilot helped participants meet the intended objectives, the program suffered a high participant attrition rate over the course of pilot. Participant feedback also suggested that modifications to program delivery, interface, and duration and requirements of challenge activities would be necessary to improve or maintain participant engagement in future iterations of the program.
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Ferrin, Thomas Lane. "Authentic Purposeful Design Within Moral Spaces of Teaching at BYU." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6748.
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This thesis is an exploration of the role of a new course design method in the teaching practice of faculty at Brigham Young University (BYU). This method, used by teaching and learning consultants at BYU, is termed authentic purposeful design. It encourages faculty to succinctly define what their course will help students become, use principles of backward design to align all course elements to that purpose, and teach the course with its core purpose in mind. The course design and teaching methods of 3 faculty members who used authentic purposeful design were studied using a qualitative research approach. Themes emerged regarding various values and forces involved as teachers strive for excellence, as well as the roles and dynamics that authentic purposeful design can have in relation to those efforts. The study also revealed ways that the formulation and use of authentic purposeful design could be altered for greater utility by consultants at BYU and other institutions of higher education.
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Bakker, Sarah C. "BYU students' beliefs about language learning and communicative language teaching activities /." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2202.pdf.
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Smith, Brandon L. "Evaluating the Feasibility of a Performance Improvement Initiative at BYU Broadcasting." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1763.pdf.
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Bakker, Sarah C. "BYU Students' Beliefs About Language Learning and Communicative Language Teaching Activities." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/1230.
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Learner beliefs, which contribute to attitude and motivation, may affect language learning. It is therefore valuable to investigate the malleability of learner beliefs, and to determine whether potentially detrimental beliefs can be ameliorated. This study examines how instruction of the principles of Second Language Acquisition (SLA) affects students' beliefs about classroom activities and their beliefs about language learning in general. The 68 first-year German students at Brigham Young University who participated in this study were asked to rate the effectiveness of three activities typical of communicative language teaching: Dialogue activities, Peer Interview activities, and Information-gap activities. They were also asked to respond to 11 statements about language learning, seven of which were taken from the Beliefs About Language Learning Inventory(Horwitz, 1988). Students responded to the survey three times: once during the first week of the semester, again during the fourth week, and again during the eighth week. During the four weeks between the second and third surveys, students in the experimental group received seven treatment lessons based on some of the basic principles of SLA. A Repeated Measures ANCOVA and a Logistical Regression were used to determine the effects of the treatment, time, and a number of demographic variables. Results of this study show that the treatment did not have a significant effect on any of the beliefs that were measured. However, one language learning belief was significantly affected by time. A majority of the students who participated in this study agreed with the statement, “The instructor should teach the class in German.” After three weeks of class instruction, however, they agreed with this statement significantly stronger. The results of this study also show that many of the demographic variables, such as gender and previous language learning experience, had a significant effect on a number of the students' beliefs.
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Larsen, Robert Brent. "A BitTorrent Proxy." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2284.pdf.
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David, Regis Agenor. "Modeling and Testing of DNA Motion for Nanoinjection." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2693.
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A new technique, called nanoinjection, is being developed to insert foreign DNA into a living cell. Such DNA transfection is commonly used to create transgenic organisms vital to the study of genetics, immunology, and many other biological sciences. In nanoinjection, DNA, which has a net negative charge, is electrically attracted to a micromachined lance. The lance then pierces the cell membranes, and the voltage on the lance is reversed, repelling the DNA into the cell. It is shown that DNA motion is strongly correlated to ion transport through a process called electrophoresis. Gel electrophoresis is used to move DNA using an electric field through a gel matrix (electrolytic solution). Understanding and using electrophoretic principals, a mathematical model was created to predict the motion (trajectory) of DNA particles as they are attracted to and repulsed from the nanoinjector lance. This work describes the protocol and presents the results for DNA motion experiments using fabricated gel electrophoresis devices. Electrophoretic systems commonly use metal electrodes in their construction. This work explores and reports the differences in electrophoretic motion of DNA (decomposition voltage, electrical field, etc.) when one electrode is constructed from a semiconductor, silicon rather than metal. Experimental results are used to update and validate the mathematical model to reflect the differences in material selection. Accurately predicting DNA motion is crucial for nanoinjection. The mathematical model allows investigation of the attraction/repulsion process by varying specific parameters. Result show that the ground electrode placement, lance orientation and lance penetration significantly affect attraction or repulsion efficiency while the gap, lance direction, lance tip width, lance tip half angle and lance tip height do not. It is also shown that the electric field around the lance is sufficient to cause localized electroporation of cell membranes, which may significantly improve the efficiency of transport.
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Erickson, Alyssa Jean. "Agile Development in Instructional Design: A Case Study at BYU Independent Study." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6780.
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Agile development is a software development methodology that originated in 2001 (Beck, et al.). It has since gained wide recognition and use in the software industry, and is characterized by iterative development cycles. Organizations outside of the software industry are also finding ways to adapt Agile development to their contexts. BYU Independent Study (BYUIS) is an online education program at Brigham Young University that provides online courses at the high school and university levels. In April 2016, BYUIS implemented the Agile development process to the design and development of online courses. This thesis is a case study that looks specifically at the adoption of Agile at BYUIS, from its implementation in April 2016 to the time of this study in summer of 2017. The question this qualitative study seeks to answer is as follows: how and why did the adoption of the Agile development methodology to instructional design practices at BYUIS reflect or differ from the 12 principles of Agile development? To answer this research question, the researcher used multiple data sources: semi-structured interviews with three administrators, two production team managers, and three instructional designers; surveys for BYUIS student employees (i.e., scrum team members) after each week of observation; and field note observations of three Agile scrum teams for two weeks each. The data from each of these sources was analyzed through a descriptive coding process and then organized into a thematic network analysis. The Results section analyzes evidence from the interviews, surveys, and observations that reflect or differ from each of the 12 principles of Agile. The Discussion addresses three main issues of implementing Agile at BYUIS: how to accommodate for part-time schedules, the complexity of working on different projects, and how to facilitate communication in scrum teams if co-location is not possible. It also looks at how these three issues could be manifest in other organizations and introduces potential solutions. The researcher then presents suggestions for future research on Agile in instructional design or other contexts.
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Gneiting, Scott Alexander. "Improved Leaky-Mode Waveguide Spatial Light Modulators for Three Dimensional Displays." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6561.
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This thesis improves on the design of the leaky-mode spatial light modulator, LMW-SLM, presented by Dr. Smalley[1]. Improvements include: input coupling gratings, a pulsed laser input, output coupling gratings, and a 3D printed adjustable module for the stabilization of critical alignments. First, input coupling gratings reduce the cost of the LMW-SLM from $500 to around $2, a drop in cost of over two orders of magnitude. This enables multiple modulators to be used in a single display and allows for an inexpensive modular design to be created. Second, a pulsed laser input allows for image creation without the use of a polygon for derotation. Removal of the polygon allows for direct viewing of the LMW-SLM output enabling near-eye and flat panel displays. Third, output coupling gratings allow for bottom exit devices that are essential for thin substrates and flat panel displays. Fourth, the 3D printed module allows for the critical alignments of the LMW-SLM to become permanent. This in turns allows for transportation of the created displays without a trained technician by abstracting away the complexities of the device. The resulting changes simplify hardware, reduce cost, and enable the LMW-SLM to be modularized and the resulting 3D displays to be transportable. These improvements are made possible by the addition of a one new mask step during fabrication, a simple circuit design, and a 3D printed module designed in SOLIDWORKS. Included in this thesis as attachments are the MATLab, Eagle, and SOLIDWORKS files used to create the improved LMW-SLM.
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Schmidt, Andrew D. "The Use of an Interactive Online Tutorial for Camera Operators at BYU Broadcasting." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1502.pdf.
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Duersch, Michael Israel. "BYU micro-SAR: A very small, low-power LFM-CW Synthetic Aperture Radar." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/728.
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Brigham Young University has developed a low-cost, light-weight, and low power consumption SAR for flight on a small unmanned aerial vehicle (UAV) at low altitudes. This micro-SAR, or uSAR, consumes only 18 watts of power, ideal for application on a small UAV. To meet these constraints, a linear frequency modulation-continuous wave (LFM-CW) transmit signal is utilized. Use of an LFM-CW signal introduces some differences from the typical strip map SAR processing model that must be addressed in signal processing algorithms. This thesis presents a derivation of the LFM-CW signal model and the associated image processing algorithms used for the uSAR developed at BYU. A data simulator for the BYU LFM-CW SAR is detailed and results are provided for the case when the simulated data are processed using the uSAR algorithms. Data processing schemes are discussed, including compression, receive signal phase detection, interference filtering and auto-focusing. Finally, data collected from the instrument itself are processed and presented.
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Mooney, Adrien Carole. "An Analysis of the Archaeological Work of the Provo River Delta, Utah." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/3974.
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Throughout the 20th century, a significant amount of work was conducted at archaeological sites in Utah Valley dating to the Archaic, Fremont, and Late Prehistoric periods. Despite the amount of work conducted, very little has actually been reported in the past. As a result, very little has previously been known about either the prehistoric archaeology of the Provo River Delta area or the historic archaeological work that has taken place. This thesis presents a synthesis of historical work, a reanalysis of artifacts from previous excavations, and a review of extant documentation (including field notes, maps, and student reports) of several sites in the Provo River Delta, including the Hinckley Mounds, Seamons Mound, and the Bee Sites.
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Smith, Tracey. "Agitators in the Land of Zion: The Anti-Vietnam War Movements at Brigham Young University, University of Utah, and Utah State University." DigitalCommons@USU, 1995. https://digitalcommons.usu.edu/etd/7116.
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Through the vantage point of institutions of higher learning, Utah's distinction as a politically conservative state dominated by the Church of Jesus Christ of Latter-day Saints is examined during the Vietnam War era. The three universities in the study-Brigham Young University, University of Utah, and Utah State University- are the three oldest and most populous universities in the state. This thesis concentrates on these three institutions and less on the politics of the state at the time. Studies showed that the universities, to varying degrees, exhibited antiwar sentiment Still, the campuses were less active in opposing the war, drawing only a very small percentage of students to demonstrations.
Brigham Young University's President, Ernest L. Wilkinson (1951-1971), vigorously guarded against signs of antiwar activity. He was involved in the 1966 spy ring, which organized students for surveillance of supposedly liberal faculty. Students who appeared to be antiwar were also scrutinized. Despite the negative sanctions on such students, a minority of pupils did oppose the war and Wilkinson's tactics.
The University of Utah produced the highest number of protesters, largely because of its more diverse and urban population. Many of the demonstrators at the U of U continued as activists in the Salt Lake Valley into the 1990s. Utah State University echoed the U of U, but to a lesser extent. Still, underground newspapers and an organized antiwar political party showed that USU also had a movement against the war. The administrations of the two schools figure into the text less powerfully than BYU's Wilkinson because they failed to become as involved in the debate.
Oral interviews dominate this thesis. Subjects were chosen according to their involvement in particular events or movements. Student newspapers and underground newspapers were also utilized.
This thesis attempted to recreate a tumultuous and turbulent time in American history. Utah's unique cultural slant showed that the Beehive State could not isolate itself from international events but also responded in its own way.
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Katz, Ana. "Fact or Fiction: Comparing BYU Library's Decision Based Learning and YSearch Source Evaluation Modules." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8545.
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Current First Year Writing research seeks to address the need to help students meet the Council of Writing Program Administrators objectives on source evaluation while also changing current pedagogy methods (Meola, 2004; Ostenson 2014; SHEG, 2016; Wineburg & McGrew, 2017). This paper seeks to compare two different source evaluation pedagogies, YSearch and Decision Based Learning, taught by Brigham Young University’s library to determine which module is more effective at teaching students source evaluation skills. To answer these questions, this study uses both quantitative and qualitative methods utilizing a quasi-experimental design by conducting an open comparison between the two pedagogy modules.
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Halverson, Peter Andrew. "Multi-stable Compliant Rolling-contact Elements." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1832.pdf.
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Canyon, Sam. "Reasons American Indian Students Do Not Typically Choose Industrial Education as a Major at BYU." CLICK HERE for online access, 1986. http://contentdm.lib.byu.edu/u?/MTAF,24790.
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Miller, Zachary Anderson. "Like and Shout: Brand Loyalty, Framing, and Fan Interactions on the BYU Football Facebook Page." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6922.
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This research is intended to provide the stewards of social media for Brigham Young University's football program with information that will allow them to make better decisions on what kind of content will maximize engagement and enhance brand loyalty among fans and consumers on Facebook. Using several variables, including the type or theme of content, post frequency, and sponsorship, content was compared against that from the University of Oregon's football program for the 2017 season. The results, found using quantitative data analysis, reveal that some variables have a significant impact on the quantity of engagement from viewers for both programs and provide valuable insights that will allow the universities to improve how and what they deliver on their Facebook pages.
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Teichert, Kendall B. "Multi-physics Modeling and Calibration for Self-sensing of Thermomechanical In-plane Microactuators." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2463.pdf.
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Ripplinger, David C. "Modeling Wireless Networks for Rate Control." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2827.
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Congestion control algorithms for wireless networks are often designed based on a model of the wireless network and its corresponding network utility maximization (NUM) problem. The NUM problem is important to researchers and industry because the wireless medium is a scarce resource, and currently operating protocols such as 802.11 often result in extremely unfair allocation of data rates. The NUM approach offers a systematic framework to build rate control protocols that guarantee fair, optimal rates. However, classical models used with the NUM approach do not incorporate partial carrier sensing and interference, which can lead to significantly suboptimal performance when actually deployed. We quantify the potential performance loss of the classical controllers by developing a new model for wireless networks, called the first-principles model, that accounts for partial carrier sensing and interference. The first-principles model reduces to the classical models precisely when these partial effects are ignored. Because the classical models can only describe a subset of the topologies described by the first-principles model, the score for the first-principles model gives an upper bound on the performance of the others. This gives us a systematic tool to determine when the classical controllers perform well and when they do not. We construct several representative topologies and report numerical results on the scores obtained by each controller and the first-principles optimal score.
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Qudisat, Rasha Mohsen. "Effect of Gender, Guilt, and Shame on BYU Business School Students' Innovation: Structural Equation Modeling Approach." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5790.
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Innovative people seize the opportunity to make lives better and more comfortable, which contribute to economy growth and financial gain. Stakeholders study innovativeness of business students, in depth, to understand gender differences, and the factors affecting students' innovativeness. Literature explains how males and females differ in their proneness to guilt and shame. However, a model that explains the dynamic of guilt, shame, and gender on innovativeness will help make policies to improve students' innovativeness. This study describes factor analysis approach to examine the TOSCA-3 subscales guilt, shame, and the DNA instrument of innovativeness. It also describes the measurement invariance across gender for each construct, and for the full measurement model to identify the differences between genders. Moreover, this study examines the total effect of gender on innovativeness, which includes the direct effect, and indirect effect via guilt and shame. The results indicated that guilt is positively associated with innovativeness, and shame and gender are negatively associated with innovativeness. This dissertation can be freely accessed and downloaded from (http://etd.byu.edu/).
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Bledsoe, Jordan Ray. "Tolerance of Ambiguity and Inductive vs. Deductive Preference Across Languages and Proficiency Levels at BYU: A Correlational Study." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2657.
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This study explored the relationships between roughly 330 participants' tolerance of ambiguity and their preference for either an inductive or deductive presentation of grammar by means of an online survey. Most participants were college students. Other variables examined included years of study, in-country experience, proficiency, age, year in school, and language of choice. A new instrument for measuring inductive vs. deductive preference was also created based on Cohen, Oxford, and Chi's (2001) Learning Style Survey (LSS). Results showed weak correlations between: tolerance of ambiguity and inductive preference (.25), tolerance of ambiguity and proficiency (.25), and inductive preference and proficiency (.20). Additional findings include: a correlation (.62) between proficiency and years of instruction received, a slight correlation (.22) between age and tolerance of ambiguity, no correlation between years of language instruction and tolerance of ambiguity, no correlation between studying abroad and ambiguity tolerance or inductive/deductive preference, and no correlation between age and inductive vs. deductive preference. Lastly, data was analyzed to determine whether language was a contributing factor or not, and only the participants learning Japanese were significantly different (p = .004), with a higher preference for inductive learning.
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Scofield, Daniel N. "Hop-by-Hop Transport Control for Multi-Hop Wireless Networks." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/889.
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TCP can perform poorly in multi-hop wireless networks due to problems with contention and poor feedback from end-to-end control algorithms. This thesis explores the design of a hop-by-hop transport protocol (HxH). By allowing intermediate nodes to actively participate, the protocol can respond more quickly to changing network conditions and exploit the unique characteristics of wireless networks. Results indicate that hop-by-hop transport can achieve throughput rates that are double those of TCP, depending on the speed of the wireless links.
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Draper, Joshua Benjamin. "Mexico Engineering Study Abroad: Assessing the Effectiveness of International Experiences on Teaching Global Engineering Skills." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2184.pdf.
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Burton, David Ray. "Preparing a Surpassing Moral Force: The Dynamics of the Brigham University Singers." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1802.pdf.
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Ellsworth, Kevin M. "Understanding Design Requirements for Building Reliable, Space-Based FPGA MGT Systems Based on Radiation Test Results." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3159.
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Space-based computing applications often demand reliable, high-bandwidth communication systems. FPGAs with Mulit-Gigabit Transceivers (MGTs) provide an effective platform for such systems, but it is important that system designers understand the possible susceptibilities MGTs present to the system. Previous work has provided a foundation for understanding the susceptibility of raw FPGA MGTs but has fallen short of testing MGTs as part of a larger system. This work focuses on answering the questions MGT system designers need to know in order to build a reliable space-based MGT system. Two radiation tests were performed with a test architecture built on the Aurora protocol. These tests were specifically designed to discover system susceptibilities, and effective mechanisms for upset detection, recovery, and recovery detection. Test results reveal that the Aurora protocol serves as an effective basis for simple point-to-point communication for space-based systems but that some additional logic is necessary for high reliability. Particularly, additional upset detection and recovery mechanisms are necessary as well as additional status indicators. These additions are minimal, however, and not all are necessary depending on system requirements. The most susceptible part of the MGT system is the MGT tile components on the RX data path. Upsets to these components most often results in data corruption only and do not affect system operation or disrupt the communication link. Most other upsets which do disrupt normal system operation can be recovered automatically by the Aurora protocol with built-in mechanisms. Only 1% of observed events in testing required additional recovery mechanisms not supplied by Aurora. In addition to test data results, this work also provides suggestions for system designers based on various system requirements and a proposed MGT system design based on the Aurora protocol. The proposed system serves as an example to illustrate how test data can be used to guide the system design and determine system availability. With this knowledge designers are able to build reliable MGT systems for a variety of space-based systems.
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Harding, Alexander Stanley. "Single Event Mitigation for Aurora Protocol Based MGT FPGA Designs in Space Environments." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4117.
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This work has extended an existing Aurora protocol for high-speed serial I/O between FPGAs to provide greater fault recovery in the presence of high-energy radiation. To improve on the Aurora protocol, additional resets that affect larger portions of the system were used. Detection for additional error modes that occurred but were not detected by the Aurora protocol was designed. Radiation testing was performed on the Aurora protocol with the additional mitigation hardware. The test gathered large amounts of data on the various error modes of the Aurora protocol and how the additional mitigation circuitry affected the system. The test results showed that the addition of the recovery circuitry greatly enhanced the Aurora protocol's ability to recover from errors. The recovery circuit recovered from all but 0.01% of errors that the Aurora protocol could not. The recovery circuit further increased the availability of the transmission link by proactively applying resets at much shorter intervals than used in previous testing. This quick recovery caused the recovery mechanism to fix some errors that may have recovered automatically with enough time. However, the system still showed an increase in performance, and unrecoverable errors were reduced 100x. The estimated unrecoverable error rate of the system is 5.9E-07 in geosynchronous orbit. The bit error rate of the enhanced system was 8.47754E-015, an order of magnitude improvement.
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Trotter, Michael Robert. "Reevaluating the New Testament Text of Didymus the Blind: An Examination of the New Testament References in P. BYU 1." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5853.
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In 1941 a large cache of papyri preserving the writings of Origen and Didymus the Blind were discovered in Tura, Egypt. 43 years later 22 signatures from the Tura papryi containing Ps. 26:10–29:2, 36:1–3 from Didymus the Blinds' commentary on Psalms were acquired by Brigham Young University. These signatures remain unpublished at present. This paper examines Didymus' use of the New Testament in this hitherto unpublished section of his commentary and seeks to reevaluate past scholarship on the New Testament text of Didymus in light of this new data. In addition to providing an inventory of all the New Testament references and significant textual variants used by Didymus in this section of his commentary, this paper will also analyze the consistency, or lack thereof, with which Didymus referenced the New Testament throughout his five Tura commentaries. This analysis will show that previous conclusions on the New Testament text of Didymus the Blind need to be reevaluated in a manner that takes into account the significant lack of consistency with which he referenced the New Testament in his classroom lectures as opposed to his published works that were intended for circulation.
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Jessup, Eric Ashton. "BYU Diesel Engine Lab Setup and Parasitic Losses of the Water Pump and Vacuum Pump on a Cummins 2.8L Engine." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8446.
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The need to minimize carbon dioxide (CO2) emissions is becoming increasingly important with the total number of vehicles throughout the world exceeding one billion. Carbon dioxide emissions can be reduced by improving vehicle fuel efficiency. While electric transportation is gaining popularity, most passenger vehicles are still powered by gasoline or diesel engines. The main objective of this work was to provide opportunities for studying and improving the fuel efficiency of internal combustion engines (ICE). This was achieved by 1) Designing, building and testing auxiliary systems necessary to run a Cummins 2.8 L engine in a an engine test cell; 2) Creating educational labs for the ICE class; and 3) Measuring the parasitic losses of the vacuum pump and water pump on the installed Cummins 2.8 L diesel engine. All auxiliary systems were completed at a hardware cost of $8100 and are rated to support an engine with the power output capacity of 233 kW (312 hp). The educational laboratories enable future engineers to measure and assess the efficiency of internal combustions engines. The parasitic losses of the vacuum pump and water pump were found to impact the relative brake fuel conversion efficiency by 1.3% and 1.5% respectively over the Federal Test Procedure (FTP) cycle.
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Johansen, Justin K. "The Impact of OpenCourseWare on Paid Enrollment in Distance Learning Courses." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3317.pdf.
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Matthews, Mark Thurgood. "Impact of Large Gravity Loads on Buckling Restrained Braced Frame Performance." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3286.pdf.
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Dehdari, Jonathan M. "Crossing Dependencies in Persian." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1441.pdf.
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Pendleton, Tyler M. "Design and Fabrication of Rotationally Tristable Compliant Mechanisms." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1552.pdf.
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Soper, Shannon Bryn. "Evidences of Critical Thinking in the Writing of First-Year College Students." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6171.
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A healthy civil society depends on citizens who have mature critical thinking skills and a willingness to entertain opposing points of view. The development of critical thinking in young adults has long been studied, but there has been little agreement on what the attributes of critical thinking are and how to reliably assess them. While many studies have attempted to assess the critical thinking abilities of college students, none have yet measured critical thinking through using the Critical Thinking Analytic Rubric (CTAR) to assess first-year college students' writing. This study used a modified version of the CTAR rubric to investigate students' critical thinking in writing completed for an American Heritage course. Four hypotheses were tested: (1) that raters would use the rubric with high inter-rater reliability estimates; (2) that there would be a significant relationship between the scores from the earlier holistic rubric used in the 2015 Hansen et al. study and the scores from the analytic rubric used in this study; (3) that there would be a significant relationship between analytic scores and ACT and GPA scores; (4) that there would be a significant relationship between essay score and gender. Findings included the following: (1) The inter-rater reliability for the overall scores of the papers was 0.898, which exceeds the 0.70 acceptable level. However, the inter-rater reliability for sub-scores was negative and required further investigation. (2) There was no significant relationship between the scores of the Hansen et al. study and this study. (3) There was no significant relationship between essay scores and ACT and GPA scores. (4) There was a significant relationship between essay scores and gender, with female students scoring higher than male students.
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Hawks, Jeffrey C. "A Variable-Stiffness Compliant Mechanism for Stiffness-Controlled Haptic Interfaces." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4356.
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In this research a variable-stiffness compliant mechanism was developed to generate variable force-displacement profiles at the mechanisms coupler point. The mechanism is based on a compliant Roberts straight-line mechanism, and the stiffness is varied by changing the effective length of the compliant links with an actuated slider. The variable-stiffness mechanism was used in a one-degree-of-freedom haptic interface to demonstrate the effectiveness of varying the stiffness of a compliant mechanism. Unlike traditional haptic interfaces, in which the force is controlled using motors and rigid links, the haptic interface developed in this work displays haptic stiffness via the variable-stiffness compliant mechanism. The force-deflection behavior of the mechanismwas analyzed using the Pseudo-Rigid Body Model (PRBM), and two key parameters, KQ and g,were optimized using finite element analysis (FEA) to match the model with the behavior of the device. One of the key features of the mechanism is that the inherent return-to-zero behavior of the compliant mechanism was used to provide the stiffness feedback felt by the user. A prototype haptic interface was developed capable of simulating the force-displacement profile of Lachmans Test performed on an injured ACL knee. The compliant haptic interface was capable of displaying stiffnesses between 4200 N/m and 7200 N/m.
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Briggs, Jared Calvin. "Developing an Architecture Framework for Cloud-Based, Multi-User, Finite Element Pre-Processing." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3813.
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This research proposes an architecture for a cloud-based, multi-user FEA pre-processing system, where multiple engineers can access and operate on the same model in a parallel environment. A prototype is discussed and tested, the results of which show that a multi-user preprocessor, where all computing is done on a central server that is hosted on a high performance system, provides significant benefits to the analysis team. These benefits include a shortened preprocessing time, and potentially higher-quality models.
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Boulter, Trent R. "Interactive TV News: A New Delivery Method for Broadcast Television News." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3751.
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This project looks at the development and use of a new delivery system for broadcast television news and its relation to the Uses and Gratifications and Push/Pull Theories. An in-home study of interactive news was conducted for two weeks, allowing people access to three local and 5 national newscasts via one interactive newscast. Users were able to access the interactive newscast whenever and however they wanted via their television or computer, as long as they had an internet connection. The results of this study show how the system was used,what specific actions were taken, and where the potential lies for further research.
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Broderick, Rick Davon. "Statnamic Lateral Loading Testing of Full-Scale 15 and 9 Group Piles in Clay." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/861.
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Studies of seismic and impact loading on foundation piles is an important and a focused interest in the engineering world today. Because of seismic and other natural events are unpredictable, uncontrollable and potentially unsafe it is a vital study to understand the behavior and relationship structures in motion have on there foundation. Statnamic Loading has become a popular method of studying this relationship in a controlled environment. Two groups of 9 and 15 driven hollow pipe piles were tested in saturated clay at the Salt Lake City Airport in July of 2002. The 9-pile group (3x3 configuration) was separated at 5.65 pile diameters and the 15-pile group (3x5 configuration) was separated at 3.92 pile diameters. The testing consisted of five target deflections. Each target deflection consisted of 15 cyclic lateral static loadings and a 16th lateral statnamic load. This study focuses on the statnamic loading. Damping ratios ranged from 23 to 50 percent for the 15-pile group and 29 to 49 percent for the 9-pile group. Both pile groups increased in damping as the deflections increased. The optimized mass in motion for the entire system was found to be roughly 21,000kg for the 15-pile group and 14,000 kg for the 9-pile group. Stiffness for the 15-pile group started at 50kN/mm and ended at 21kN/mm. The 9-pile group ranged from 28kN/mm to 12kN/mm.
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Edwards, Barrett Bruce. "An Onboard Vision System for Unmanned Aerial Vehicle Guidance." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2381.
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The viability of small Unmanned Aerial Vehicles (UAVs) as a stable platform for specific application use has been significantly advanced in recent years. Initial focus of lightweight UAV development was to create a craft capable of stable and controllable flight. This is largely a solved problem. Currently, the field has progressed to the point that unmanned aircraft can be carried in a backpack, launched by hand, weigh only a few pounds and be capable of navigating through unrestricted airspace. The most basic use of a UAV is to visually observe the environment and use that information to influence decision making. Previous attempts at using visual information to control a small UAV used an off-board approach where the video stream from an onboard camera was transmitted down to a ground station for processing and decision making. These attempts achieved limited results as the two-way transmission time introduced unacceptable amounts of latency into time-sensitive control algorithms. Onboard image processing offers a low-latency solution that will avoid the negative effects of two-way communication to a ground station. The first part of this thesis will show that onboard visual processing is capable of meeting the real-time control demands of an autonomous vehicle, which will also include the evaluation of potential onboard computing platforms. FPGA-based image processing will be shown to be the ideal technology for lightweight unmanned aircraft. The second part of this thesis will focus on the exact onboard vision system implementation for two proof-of-concept applications. The first application describes the use of machine vision algorithms to locate and track a target landing site for a UAV. GPS guidance was insufficient for this task. A vision system was utilized to localize the target site during approach and provide course correction updates to the UAV. The second application describes a feature detection and tracking sub-system that can be used in higher level application algorithms.
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Rushton, Brian Craig. "Subdivision Rules, 3-Manifolds, and Circle Packings." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/2985.
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We study the relationship between subdivision rules, 3-dimensional manifolds, and circle packings. We find explicit subdivision rules for closed right-angled hyperbolic manifolds, a large family of hyperbolic manifolds with boundary, and all 3-manifolds of the E^3,H^2 x R, S^2 x R, SL_2(R), and S^3 geometries (up to finite covers). We define subdivision rules in all dimensions and find explicit subdivision rules for the n-dimensional torus as an example in each dimension. We define a graph and space at infinity for all subdivision rules, and use that to show that all subdivision rules for non-hyperbolic manifolds have mesh not going to 0. We provide an alternate proof of the Combinatorial Riemann Mapping Theorem using circle packings (although this has been done before). We provide a new definition of conformal for subdivision rules of unbounded valence, show that the subdivision rules for the Borromean rings complement are conformal and show that barycentric subdivision is almost conformal. Finally, we show that subdivision rules can be degenerate on a dense set, while still having convergent circle packings.
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Lewis, Velda Gale Davis. "From Womanhood to Sisterhood: The Evolution of the Brigham Young University Women's Conference." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1242.pdf.
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Hogge, Jeffrey V. "Development of a Miniature VTOL Tail-Sitter Unmanned Aerial Vehicle." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2372.pdf.
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Hoopes, Stacey Lea. "An Overview of Instructional Activities Used Before, During, and After Reading to Scaffold Guided Reading and Shared Reading Instruction." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1708.
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The purpose of this study was to investigate the use of instructional activities that take place before reading, during reading, and after reading in guided reading and shared reading routines in elementary school classrooms in Utah school districts. This project used extant data from classroom observations to answer questions about how the observed activities were used as part of guided and shared reading routines in second and third grades within the five school districts of the Brigham Young University-Public School Partnership. The results of this study showed that there were differences in how teachers implemented the before reading, during reading, and after reading activities for guided and shared reading. The average teacher devoted more time to instructional activities during the reading portion of guided or shared reading than to instructional activities used before reading or after reading as part of the guided reading or shared reading routines. Differences between frequencies for instructional activities done after reading in guided reading differed significantly between second and third grade classrooms in the study. This study determined that school districts in the study had significantly different frequencies for instructional activities implemented before, during, and after reading in guided reading. These significant results and the results of other comparisons were used to provide insights about the possible implications of this study.
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Stoddard, Aaron Gerald. "Configuration Scrubbing Architectures for High-Reliability FPGA Systems." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5704.
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Field Programmable Gate Arrays (FPGAs) are being used more frequently in space applications because of their reconfigurability and intensive processing capabilities. FPGAs in environments like space are susceptible to ionizing radiation which can cause Single Event Upsets (SEUs) in the FPGA's configuration memory. These upsets may cause the programmed user design on the FPGA to deviate from its normal behavior. Space missions cannot afford to allow important data processing applications to become corrupted due to these radiation upsets.Configuration scrubbing is an upset mitigation technique that detects and corrects upsets in an FPGA's configuration memory. Configuration scrubbing periodically monitors an FPGA's configuration memory utilizing mechanisms such as Error Correction Codes (ECCs), Cyclic Redundancy Checks (CRCs), a protected golden file, and partial reconfiguration to detect and correct upset memory bits. This work presents improved Xilinx 7-Series configuration scrubbing architectures that achieve minimal hardware footprints, competitive performance metrics, and robust detection and correction capabilities. The two principal scrubbing architectures presented in this work are the readback and hybrid scrubbers which detect and correct Single Bit Upsets (SBUs) and Multi-Bit Upsets (MBUs). Harnessing the performance advantages granted by the 7-Series internal Readback CRC scan, a hybrid scrubber built in software for the Zynq XZC07020 FPGA has been measured to correct SBUs in 8.024 ms, even-numbered MBUs in 13.38 ms, and odd-numbered MBUs in 21.40 ms. It can also perform a full readback scrub of the entire device in under two seconds. These scrubbing architectures were validated in radiation beam tests, where one of the architectures corrected MBUs as large as sixteen bits in a single frame.
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Nelson, Hans J. "A Two-level Engine for Tagalog Morphology and a Structured XML Output for PC-Kimmo." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd465.pdf.
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Jensen, Jared Wilfred. "The Development of an Accelerated Testing Facility for the Study of Deposits in Land-Based Gas Turbine Engines." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/148.
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Turbine engine efficiency modeling depends on many parameters related to fluid dynamics and heat transfer. Many of these parameters change dynamically once the engine enters service and begins to experience surface degradation. This thesis presents a validation of the design and operation of an accelerated testing facility for the study of foreign deposit layers typical to the operation of land-based gas turbines. It also reports on the use of this facility in an effort to characterize the change in thermal resistance on the surface of turbine blades as deposits accumulate. The facility was designed to produce turbine deposits in a 4-hour test that would simulate 10,000 hours of turbine operation. This is accomplished by matching the net foreign particulate throughput of an actual gas turbine. Flow Mach number, temperature and particulate impingement angle are also matched. Validation tests were conducted to model the ingestion of foreign particulate typically found in the urban environment. The majority of this particulate is ceramic in nature and smaller than 10µm in size, but varies in size up to 80µm. Deposits were formed for flow Mach number and temperature of 0.3 and 1150°C respectively, using air plasma sprayed (APS) thermal barrier coat (TBC) material coupons donated from industry. These conditions are typical of a modern, first stage nozzle. Investigations over a range of impingement angles yielded samples with deposit thicknesses from 50 to 200µm in 4-hour, accelerated-service simulations. Above a threshold temperature, deposit thickness was dependent primarily upon particle concentration. Test validation was achieved using direct comparison with deposits from service hardware. Deposit characteristics affecting blade heat transfer via convection and conduction were assessed. Surface topography analysis indicated that the surface structure of the generated deposits were similar to those found on actual turbine blades. Scanning electron microscope (SEM) and x-ray spectroscopy analyses indicated that the deposit microstructures and chemical compositions were comparable to turbine blade deposit samples obtained from industry. A roadmap for the development of a theoretical model of thermal resistance using the SEM scan is presented. Thermal resistance experiments conducted with deposit samples indicate that a general decrease in thermal resistance occurs as the samples are exposed to operating conditions in the accelerated testing facility. This is likely due to sintering effects within the TBC dominating any thermal resistance increase arising from deposition. Recommendations for future research into the interaction between TBC sintering and deposit evolution are presented.