Digital Commons Network^™

Cluster-Based Salient Object Detection Using K-Means Merging And Keypoint Separation With Rectangular Centers, Robert Buck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The explosion of internet traffic, advent of social media sites such as Facebook and Twitter, and increased availability of digital cameras has saturated life with images and videos. Never before has it been so important to sift quickly through large amounts of digital information. Salient Object Detection (SOD) is a computer vision topic that finds methods to locate important objects in pictures. SOD has proven to be helpful in numerous applications such as image forgery detection and traffic sign recognition. In this thesis, I outline a novel SOD technique to automatically isolate important objects from the background in images.

Visualization Of Three-Dimensional Models From Multiple Texel Images Created From Fused Ladar/Digital Imagery, Cody C. Killpack

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ability to create three-dimensional (3D) images offers a wide variety of solutions to meet ever increasing consumer demands. As popularity for 3D cinema and television continues to grow, 3D images will remain an important area of research and development. While there are a variety of ways to create a 3D model, textel images are quickly become the preferred solution that has been captured with a texel camera. The combination of multiple texel images taken around a scene can be used to form a texel model. Offering both visual and dimensional accuracy, texel models are becoming invaluable tools for disaster …

An Economic Analysis Of Factors Affecting Pre-Weaned Dairy Calf Growth And Profit Optimization In Dairy Calf Operations, Vincent T. Hess

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was an extension of a study submitted in April 2014 by Sheldon D. Holt entitled “Ambient Temperature, Calf Intakes, and Weight Gains on Preweaned Dairy Calves”.

A major component in a profitable dairy operation is the raising of female calves as replacement heifers; but since no direct income is generated by calf raising alone, it is often overlooked as a potential profit area on a dairy farm. Calf management practices that ultimately impact milk productivity and reproductive performance during a heifer’s lifetime begin at birth. This study examines the effect of calf starter intake on calf growth, measuring …

Efficient Device To Device Communications Underlaying Heterogeneous Networks, Xue Chen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Device-to-Device communications have the great potential to bring significant performance boost to the conventional heterogeneous network by reusing cellular resources. In cellular networks, Device-to-Device communication is defined as two user equipments in a close range communicating directly with each other without going through the base station, thus offloading cellular traffic from cellular networks. In addition to improve network spectral efficiency, D2D communication can also improve energy efficiency and user experience.

However, the co-existence of D2D communication on the same spectrum with cellular users can cause severe interference to the primary cellular users. Thus the performance of cellular users must be …

The Mh-2 Core From Project Hotspot: Description, Geologic Interpretation, And Significance To Geothermal Exploration In The Western Snake River Plain, Idaho, Jerome A. Varriale

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Harnessing the earth’s natural heat generation as an energy resource has seen increased interest in recent history. While geothermal energy is a sustainable, low-carbon emitting, and viable source of energy in certain regions, large upfront risks, including costs of exploration and deep well drilling, have kept private sector investment at bay. Lowering the risks to capital investment that are inherent to subsurface exploration can help to assuage investors and bring this well-known energy-generating technology to the masses.

A blind potential geothermal system was encountered while drilling the MH2 science drill hole, on Mountain Home Air Force Base, Idaho. The MH-2 …

Evapotranspiration Estimation: A Study Of Methods In The Western United States, Clayton S. Lewis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Theoretical water use of well-watered vegetation in the western United States was investigated by comparing a gridded dataset developed from satellite and ground instruments to weather stations representative of irrigated agricultural conditions. Since wetter environments are cooler and therefore subject to lower levels of evaporation than the same scenario with warmer temperatures, models derived from dryland and often populated areas overestimate potential plant needs in semi-arid or arid conditions. Evaluation of the model revealed an acceptable fit for air temperatures and solar radiation but with less confidence in humidity and wind speeds. Ultimately, the last two parameters were minor components …

Separation Of Points And Interval Estimation In Mixed Dose-Response Curves With Selective Component Labeling, Darl D. Flake Ii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Dose-response experiments are those that involve giving subjects different amounts of a treatment and observing the outcome. For example, plants may be given fertilizer and their growth could be measured or cancer patients could be given different doses of chemotherapy and their response could be monitored. These experiments are used to understand the relationship between the amount of, and response to, the treatment. Logistic regression models are often used to summarize data from these types of experiments. The dose-response experiment that motivated this dissertation involved treating a grain-pest with a pesticide. Some of the beetles had genes that made them …

Investigating The Effect Of Carbon Nanotube Functionalization In A Polydimethylsiloxane Composite Through Use Of A Stepped Bar Apparatus, Matthew I. Ralphs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thermal interface materials (TIMs) are used in transporting heat away from a circuit or electronic module. Composite materials are a popular research area for TIMs because they allow the desired properties to be joined in a composite to take advantage of the best properties from all the constituents involved. The composite selected for this study uses carbon nanotubes (CNT) as the filler and an elastomeric polymer for the matrix, specifically a multiwalled carbon nanotube (MWCNT) / polydimethylsiloxane (PDMS) composite. This study looks at chemical modification (functionalization) of the CNTin an effort to produce a better bond between the CNT and …

Effects Of A Self-Management Procedure Using Student Feedback On Staff Members' Use Of Praise In An Out-Of-School Time Program, Cade T. Charlton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Out-of-school time (OST) programs are under increasing pressure to improve student achievement. However, OST program administrators face a number of challenges to improving program effectiveness including inconsistent student participation, inexperienced staff members, and a lack of high-quality professional development. OST program administrators can address these challenges by implementing staff development practices that encourage the use of effective instructional strategies.

Specific praise is a simple and effective instructional strategy that has been linked to improved student engagement, enhanced academic achievement, and stronger student-teacher relationships. Unfortunately, there have been very few studies examining the effects of interventions designed to increase OST staff …

Anaerobic Hydrogen And Methane Production From Dairy Processing Waste: Experiment And Modeling, Jianming Zhong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Dairy processing waste (DPW) is the waste produced from manufacturing dairy products: cheese, yogurt, ice cream, milk, butter, etc. DPW is high in chemical oxygen demand (COD) due to its lactose, fat and protein content, and therefore needs to be appropriately treated. An investigation was conducted to produce energy (hydrogen and methane) from DPW by anaerobic digestion. This project developed an effective engineering method for stable methane production from DPW without adding pH control chemicals. This study also explored the optimal operational condition for hydrogen production from DPW. We further built a mathematical model to help us monitor and predict …

Development Of A Three-Dimensional High-Order Strand-Grids Approach, Oisin Tong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The strand-Cartesian grid approach is a unique method of generating and computing fluid dynamic simulations. The strand-Cartesian approach provides highly desirable qualities of fully-automatic grid generation and high accuracy. This work focuses on development of a high-accuracy methodology (high-order scheme) on strand grids for two and three dimensions.

In this work, the high-order scheme is extended to high-Reynolds number computations in both two and three dimensions with the Spalart-Allmaras turbulence model and the Menter SST turbulence model. In addition, a simple limiter is explored to allow the high-order scheme to accurately predict discontinuous flows.

Extensive verification and validation is conducted …

A Spatiotemporal Mountain Pine Beetle Outbreak Model Predicting Severity, Cycle Period, And Invasion Speed, Jacob P. Duncan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mountain pine beetle (MPB, Dendroctonus ponderosae), a tree-killing bark beetle, has historically been part of the normal disturbance regime in lodgepole pine (Pinus contorta) forests. In recent years, warm winters and summers have allowed MPB populations to achieve synchronous emergence and successful attacks, resulting in widespread population outbreaks and resultant tree mortality across western North America. We develop an age-structured forest demographic model that incorporates temperature-dependent MPB infestations: the Susceptible-Infested-Juvenile (SIJ) model. Stability of equilibria is analyzed as a function of population growth rates, and indicates the existence of periodic outbreaks that intensify as growth rates …

Aligning Conservation Goals And Management Objectives For Bonneville Cutthroat Trout (Oncorhynchus Clarki Utah) In The Logan River, Utah, Harrison E. Mohn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rivers are often managed without informed knowledge of how sportfish use different areas of the river to reproduce, and rarely take into account the relationship between fish movement and how they are distributed within the river when making management decisions. The population of native Bonneville cutthroat trout (Oncorhynchus clarki utah) within the Logan River is the largest documented population remaining for this imperiled species, and still maintains extremely high numbers of fish in the upper river. Currently, fishing is not allowed in the upper 20 kilometers of the Logan River watershed during spawning, based on the assumption that …

Motionscan: Towards Brain Concussion Detection With A Mobile Tablet Device, Shantanu Saxena

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis reports on a study to determine the viability of using a mobile tablet device as a brain concussion detection tool. The research builds upon the results of a prior method of collecting data for measuring motion sensitivity, where a user presses and releases a force sensor to balance a rising and falling line on a computer display. The motion sensitivity data collected using this force sensor device was shown to have less irregularity in persons with concussion. The MotionScan application, developed for this research, uses the accelerometer of a tablet device to record motor movement of a user …

A Mixed-Method Study Of Mobile Devices And Student Self-Directed Learning And Achievement During A Middle School Stem Activity, Scott Bartholomew

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With the increasingly ubiquitous nature of mobile devices among K-12 students, many argue for and against the inclusion of these devices in K-12 classrooms. Arguments in favor cite instant access to information and collaboration with others as positive affordances made possible through mobile devices. Self-directed learning, a process where individuals take charge of their learning and decide what they will learn, how they learn it, and how they assess their learning, has been identified as an increasingly important trait for K-12 students. The relationship between mobile device access in K-12 education settings and student self-directed learning has not been explored. …

Rudder Augmented Trajectory Correction For Unmanned Aerial Vehicles To Decrease Lateral Image Errors Of Fixed Camera Payloads, Thomas M. Fisher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

When using small unmanned aerial vehicles (UAVs) with cameras onboard for ground surveying, two competing problems arise. First is the desire to keep the camera sensor parallel with the ground and second is to maintain the proper flight path. When the cameras are physically fixed to the UAV and as the plane banks to maintain the desired path, the camera sensor is no longer kept parallel with the ground. This thesis focuses on a method called rudder augmented trajectory correction that allows for flat turns instead of banking the aircraft. Because of this, the camera is able to stay parallel …

Atp Usage In The Dark-Operative Protochlorophyllide Oxidoreductase, Mark S. Soffe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Chlorophylls are essential pigment molecules that function in photosynthesis, and serve to aid in utilizing energy from sunlight to power cellular processes in plants, and other organisms. To make chlorophyll, photosynthetic organisms devote an abundance of resources and energy to ensure their appropriate construction. This process of making chlorophylls is highlighted by the penultimate step in the pathway—the conversion of protochlorophyllide (Pchlide) to chlorophyllide a (Chlide).

This conversion can be mediated in two different ways, depending on the type of organism. The first method incorporates the use of a light-activated system called the light-dependent protochlorophyllide oxidoreductase (LPOR). This system, as …

Teacher Attitudes And Perceptions Of Low And High Socioeconomic Status Students, Patty C. Norman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this qualitative study, the author explored the perceptions of 10 middle-class, teachers regarding the socioeconomic class of both impoverished and advantaged students with whom they worked. Teachers in two public elementary schools from one Intermountain West school district participated; one school generally served children living in poverty and the other generally served affluent children. Through analysis of surveys, interviews, teacher journals, and researcher journal, the complex and often times contradictory feelings these teachers had about the socioeconomic class of students were revealed.

Literature in class, socioeconomic class, deficit thinking, race and whiteness, and identity and multiple identities situated the …

Fear-Based Policymaking: How Government Agencies Exploit Mortality Risk Perceptions, Alecia M. Hunter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this thesis is to explore how government policymakers use distorted Value of a Statistical Life (VSL) calculations for their personal benefit. The VSL estimates how much a large group of citizens would jointly pay to save the life a one random person from a fatal disease. The VSL is used by government agencies like the Environmental Protection Agency. Agencies use the VSL in benefit-cost analyses to help determine potentially favorable life-saving policy from wasteful policy. Despite the well-intentioned objectiveness and decisiveness of the VSL, the political framework incentivizes miscalculated and exaggerated VSL estimates. Public choice theory addresses …

The Influence Of Small Displacement Faults On Seal Integrity And Lateral Movement Of Fluids, Eric A. Rasmusson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As groundwater, liquid and gas hydrocarbons, or CO₂ fluids move through the subsurface, faults can act as pathways or barriers to flow. Recent studies also show that when a fault juxtaposes high permeability sandstone against a low permeability shale, the corner at the sandstone-shale interface and the fault can become a site of high pressure that may fracture the seal and allow fluids to escape. This can have negative implications for industries dependent on the quality of that seal, for example, petroleum, CO₂ sequestration, waste fluid injection, and nuclear waste storage industries.

We examined five small-scale faults in …

Toward A General Parametric Model For Assessing The Impact Of Video Transcoding On Objective Video Quality, Nawaf Omar N. Alsrehin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ultimate goal of any video delivery system is to allow any user to watch any video of any kind on any display device over any type of network with a desired output, i.e., viewing codec with preferred quality of service. This could theoretically require 1032 video transcoding functions that convert any original video to any desired output. Guaranteeing a required format and preferred quality of service of the perceived video requires selecting or composing a set of transcoding functions that satisfy the requested format and preferred quality of service. An effective way to accomplish this is by allowing the …

The Application Of Unmanned Aerial Vehicle To Precision Agriculture: Chlorophyll, Nitrogen, And Evapotranspiration Estimation, Manal Elarab

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Precision agriculture (PA) is an integration of a set of technologies aiming to improve productivity and profitability while sustaining the quality of the surrounding environment. It is a process that vastly relies on high-resolution information to enable greater precision in the management of inputs to production. This dissertation explores the usage of multispectral high resolution aerial imagery acquired by an unmanned aerial systems (UAS) platform to estimate three fundamental crop parameters (plant chlorophyll, leaf nitrogen and crop water demand). The UAS acquired imagery in the visual, near infrared and thermal infrared spectra with a resolution of less than a meter …

Structural Insights Into The Regulation Of Electron Transfer In Nitrogenase, And Modulating The Reactivity Of The Isolated Iron Molybdenum Cofactor, Andrew J. Rasmussen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One of the most important scientific advances in the last century was the Haber-Bosch process, the industrial process of fixing nitrogen from the atmosphere to ammonia. This allowed for the commercial production and sale of nitrogen for important uses such as fertilizer for farming. The Haber-Bosch process is partially credited with the population boom that has been seen in the last century and has greatly increased the standard of living in the developed world today. While this was a great scientific breakthrough, the cost of producing the required ammonia is high, and roughly 2% of worldwide energy is used annually …

Exploiting Self-Organization In Bioengineered Systems: A Computational Approach, Delin Davis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bio-reactors, also known as microbial factories are used extensively to produce various industrially valuable products. However, scalability and stability of these factories are limited as it is difficult to deliver nutrients and extract product and waste from a large system. Current solution approaches explore changes in the physical configuration of the bio-reactors. Inspired from the nutrient delivery mechanisms of large organisms in nature, this work studies the possibilities of exploiting self-organizing bio-engineered cells which are capable of organizing into a vessel network to support the producer cells in the factory.

Primary goal of this dissertation is to design a proof-of-concept …

Modified Trajectory Shaping Guidance For Autonomous Path Following Control Of Platooning Ground Vehicles, Ishmaal T. Erekson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis proposes a modification of trajectory shaping guidance to provide more accurate path convergence in curved paths. The object of this thesis is to apply this simple guidance law to platooning control to ensure all vehicles in the platoon converge to a desired constant radius path at a desired vehicle separation distance. To show the viability of this new guidance law, it is shown mathematically to be exponentially stable. It is also confirmed through simulations and on ground robots.

Synthesis, Structure-Activity Relationship Study, And Mode Of Action Study Of 1,4-Naphthoquinone Based Anticancer And Antimicrobial Agents, Jaya P. Shrestha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The first three projects involve the synthesis and the mode of action study of 1,4-naphthoquinone based anticancer agents. These anticancer agents are highly potent against a wide range of cancer cell lines. These compounds showed ~8-fold selectivity towards the lung cancer cell line than the normal cell line. We also studied the mode of action and observed that generation of reactive oxygen species is the primary mode of action.

The final project involves the synthesis of multi-cationic antimicrobial agents. These compounds are active against both bacteria and fungi. These compounds are very easy to synthesize and can be scaled up …

Anaerobic Digestion Process Stability And The Extension Of The Adm1 For Municipal Sludge Co-Digested With Bakery Waste, Morris Elya Demitry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The anaerobic digestion process is used to treat and convert waste organic matter to biogas (principally methane and carbon dioxide) through biological, chemical and physical reactions. The biogas can be used as a source of energy recovery. In order to increase the biogas production rate, two different kinds of waste (municipal wastewater treatment sludge and bakery waste) were mixed together to enhance the anaerobic process and increase the biogas production in pilot scale reactors. The process succeeded in increasing biogas production and at the same time kept the process of treatment effective when high rates of organics were fed to …

Computational Studies Of Microscopic Superfluidity In 4he Clusters, Angeline R. Wairegi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The onset of microscopic superfluidity has been reported in ultracold droplets of bosons (⁴He atoms or para-H₂ molecules) containing a variety of molecular dopants. The physics of these droplets involve both Bose-Einstein condensation (BEC) and superfluidity. The two phenomena, while closely related, are not exactly the same. Superfluidity is fundamentally a microscopic effect and thermodynamic limit is necessary; it is still remarkable, though, that the signature of superfluidity has been reported in doped droplets consisting of as few as 4 ⁴He atoms. The studies presented here adopt a molecular vantage point to investigate the quantum mechanics …

Bayesian Models For Repeated Measures Data Using Markov Chain Monte Carlo Methods, Yuanzhi Li

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bayesian models for repeated measures data are fitted to three different data an analysis projects. Markov Chain Monte Carlo (MCMC) methodology is applied to each case with Gibbs sampling and/or an adaptive Metropolis-Hastings (MH) algorithm used to simulate the posterior distribution of parameters. We implement a Bayesian model with different variance-covariance structures to an audit fee data set. Block structures and linear models for variances are used to examine the linear trend and different behaviors before and after regulatory change during year 2004-2005. We proposed a Bayesian hierarchical model with latent teacher effects, to determine whether teacher professional development (PD) …

Refugee And Employer Perceptions Of The Effects Of Capital On Refugee Employability In Utah, Christian L. Fritz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Sociology, Social Work, and Anthropology Department at Utah State University conducted a state-wide needs assessment of refugees in Utah for the Utah
Department of Workforce Services. Using the data collected for this project, I analyzed the interview transcripts of twenty-four participants in the study including eight employers of refugees, eight Iraqi refugees, and eight Burmese refugees. I looked at the skills, education, finances, personal connections, personal attitudes, and cultural knowledge of the refugees and compared those to the desires of the employers of
refugees.

I found that the employers favored refugee employees because they work hard and do not …