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Articles 1 - 30 of 84
Full-Text Articles in Engineering
Design And Testing Of A Nanosatellite Simulator Reaction Wheel Attitude Control System, Fredric William Long
Design And Testing Of A Nanosatellite Simulator Reaction Wheel Attitude Control System, Fredric William Long
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Attitude control of a satellite is required for the pointing of communications antennas and other instruments. For this reason, a control algorithm capable of precision pointing is important. Because the process of sending a satellite into space is time consuming and costly, ground-based methods of testing are paramount. A simulator is a low-cost, groundbased system made to mimic the conditions of a weightless satellite in space. The simulator used in this project controls attitude through applying torque to reaction wheels. The objective of this project is to derive and test a control algorithm for the attitude control of a satellite …
Targeted Drug Delivery System For Kidney And/Or Liver Failure Patients Using Human Serum Albumin, Sean Bedingfield
Targeted Drug Delivery System For Kidney And/Or Liver Failure Patients Using Human Serum Albumin, Sean Bedingfield
Undergraduate Honors Capstone Projects
Compromised liver and/or kidney function reduces the acceptable dosage of a variety of medications that can be administered to patients. These patients still have a need for drugs such as nonsteroidal anti-inflammatory drugs (NSAIDs), antivirals, and antibiotics. The project goal is to provide a drug delivery system to accommodate these reduced dosage limits with added therapeutic benefits to address symptoms of liver or kidney failure. Localized drug delivery allows for a smaller, concentrated dose rather than inundating the patient's system with the drug of interest. Human serum albumin (HSA) is a researched candidate for drug delivery with therapeutic properties. HSA …
A Study Of The Variability Versus The Assumed Constancy Of Manning's N, Tyler G. Allen
A Study Of The Variability Versus The Assumed Constancy Of Manning's N, Tyler G. Allen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Culverts have traditionally been designed to a minimal size to pass a specific design flood. The traditional culvert designs may result in a localized increase in velocity which can result in a blockage of animal or fish movement across a barrier effectively changing the ecosystem surrounding a number of affected species. While hydraulic loss coefficients are relatively well defined for such traditional culverts, the National Cooperative Highway Research Program (NCHRP) identified a need for further study of these coefficients for culverts more conducive to fish and animal passage.
A research team headed by Dr. Blake Tullis of Utah State University …
A Review Of Steel Content Taught In U.S. University Construction Management Programs, Jeremy Miles Thompson
A Review Of Steel Content Taught In U.S. University Construction Management Programs, Jeremy Miles Thompson
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Throughout the rocky mountain region there are 18 universities that offer a bachelor’s degree in Construction Management (CM). Only two of those universities, Colorado State University and Brigham Young University Idaho, offer an in-depth course on the application of steel in the construction industry. The other universities offer structures courses that teach only the basics of steel in the construction industry, like how to calculate loads using steel beams and columns.
The Development And Validation Of An Isokinetic Calibration System For Multiple Aerosol Instruments, Wendy Michelle Merkley
The Development And Validation Of An Isokinetic Calibration System For Multiple Aerosol Instruments, Wendy Michelle Merkley
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
A multi-port calibration xture for the cross calibration of aerosol point sensors has been developed. The system was designed for comparative calibrations of instruments using differing measurement methods such as optical particle counters, aerodynamic impactors, etc. Four isokinetic sampling ports are attached to a laminar ow plenum such that all four sampling ports sample identical aerosol concentrations under identical ow conditions. Correlation and correction factors are applied to each instrument creating a standard method. This standard method can be applied to inter-compare and calibrate aerosol sensing instrumentation and/or to characterize the microphysical properties of a test aerosol. The performance of …
The Space Plug-And-Play Architecture Services Manager And Its Relevance In Diverse Plug-And-Play Software Systems, Brandon Holdaway
The Space Plug-And-Play Architecture Services Manager And Its Relevance In Diverse Plug-And-Play Software Systems, Brandon Holdaway
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The Space Plug-and-Play Archichecture System Manager (SSM) is a system of Space Plug-and-Play Architecture (SPA) hardware, software components, and services for rapid integration of satellite systems. It was originally designed to help decrease the amount of time and money required to integrate payloads onto a satellite. The features of the SSM make it useful in non-satellite systems. In this report, I demonstrate diverse uses of the SSM in a multi-use payload manage- ment and underwater vehicle software solution which was designed and implemented using the SSM. Further I give a detailed explanation of the successes and failures of the software …
Reliability Analysis For Shear In Lightweight Reinforced Concrete Bridges Using Shear Beam Database, Danile F. Jensen
Reliability Analysis For Shear In Lightweight Reinforced Concrete Bridges Using Shear Beam Database, Danile F. Jensen
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The objective of this report is to analyze and calibrate the reliability indices for shear in reinforced concrete bridge girders. Existing statistical models are based on limited experimental data from only a few research tests. These existing models show that our current procedures for analysis are about 10-15% less conservative for lightweight concrete compared to an analysis for normal weight concrete. Accurate load models are used to find shear and moment envelopes of loads applied to bridges. Analysis is based on different span lengths, span number and girder dimensions. Design calculations are performed using design values and loads calculated from …
Exploiting Sparsity And Dictionary Learning To Efficiently Classify Materials In Hyperspectral Imagery, Andrew E. Pound
Exploiting Sparsity And Dictionary Learning To Efficiently Classify Materials In Hyperspectral Imagery, Andrew E. Pound
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Hyperspectral imaging (HSI) produces spatial images with pixels that, instead of consisting of three colors, consist of hundreds of spectral measurements. Because there are so many measurements for each pixel, analysis of HSI is difficult. Frequently, standard techniques are used to help make analysis more tractable by representing the HSI data in a different manner.
This research explores the utility of representing the HSI data in a learned dictionary basis for the express purpose of material identification and classification. Multiclass classification is performed on the transformed data using the RandomForests algorithm. Performance results are reported.
In addition to classification, single …
Parasitic Layer-Based Reconfigurable Antenna And Array For Wireless Applications, Zhouyuan Li
Parasitic Layer-Based Reconfigurable Antenna And Array For Wireless Applications, Zhouyuan Li
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Antenna is one of the most important components in wireless systems since signal transmission and reception are conducted through the antenna interface. Therefore, the signal quality is highly affected by the properties of the antenna. Traditional antennas integrated in devices such as laptops or cell phones have fixed radiation properties and can not be changed to adapt to different environments. Thus the performance of thefwhole system will be negatively affected since the antenna will not operate in the optimum status in different environments. To solve this problem, reconfigurable antenna, which can dynamically change its operation frequency, radiation pattern, and polarization, …
Sustainable Production Of Novel Biomaterials In Escherichia Coli, Asif Rahman
Sustainable Production Of Novel Biomaterials In Escherichia Coli, Asif Rahman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The biotechnology revenues in the United States exceeded $100 billion in 2010 and the potential impact of synthetic biological engineering has been identified nationally as an emerging technology to further expand the national bioeconomy. Synthetic biological engineering approaches biology from an engineering perspective to make biology easier to engineer. The potential to engineer microorganisms for novel applications can have far-reaching implications and benefits for society. Some of the potential applications range from biosensors, biofuels, therapeutics, and biomaterials.
In this study two biomaterials were produced in genetically engineered Escherichia coli: polyhydroxybutyrates (PHBs) and spider silk. PHBs are bioplastics that have …
Flexural, Shear, And Punching Shear Capacity Of Three 48-Year-Old Prestressed Lightweight Concrete Double-Tee Bridge Girders, Christopher S. Pettigrew
Flexural, Shear, And Punching Shear Capacity Of Three 48-Year-Old Prestressed Lightweight Concrete Double-Tee Bridge Girders, Christopher S. Pettigrew
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Icy Springs Bridge in Coalville, Utah carries 2nd South Street over the Weber River west of Interstate 80. The bridge is owned by Coalville City and was originally constructed in 1965 as a single-span 51-foot long bridge using prestressed concrete double-tee girders. In the fall of 2013 the original bridge was replaced with a new 80-foot long single span bridge using prestressed concrete decked bulb-tee girders. The original girders were salvaged and transported to the Systems, Materials, and Structural Health Lab (SMASH Lab) where a series of tests were performed to determine the total losses in the prestressing …
Metabolic Modeling Of Spider Silk Production In E. Coli, Sarah Allred
Metabolic Modeling Of Spider Silk Production In E. Coli, Sarah Allred
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Spider silk has the potential to be a useful biomaterial due to its high tensile strength and elasticity. It is also biocompatible and biodegradable, making it useful for wound dressings and sutures, tissue and bone scaffolds, vessels for drug delivery, and ligament and tendon replacements. In some studies where spider silk has been used to grow cells, the silk has promoted more cell growth than the control. However, it is difficult to obtain the high volume of silk needed for these undertakings on a large scale. Spiders are territorial and cannibalistic, so they cannot be easily farmed. Therefore, spider silk …
Numerical Examination Of Flux Correction For Solving The Navier-Stokes Equations On Unstructured Meshes, Dalon G. Work
Numerical Examination Of Flux Correction For Solving The Navier-Stokes Equations On Unstructured Meshes, Dalon G. Work
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This work examines the feasibility of a novel high-order numerical method, which has been termed Flux Correction. This is accomplished by comparing it against another high-order method called Flux Reconstruction. These numerical methods are used to solve the Navier-Stokes equations, which govern the motion of fluid flow. High-order numerical methods, or those that demonstrate a third-order and higher solution error convergence rate, are rarely used on unstructured meshes when solving fluid problems. Flux Correction intends to make high-order accuracy available to the larger world of Computational Fluid Dynamics in a simple and effective manner. The advantages and disadvantages of the …
The Effects Of Laser Etching On Biocompatability And Mechanical Properties Of Polyetheretherketone, Andrew I. Deceuster
The Effects Of Laser Etching On Biocompatability And Mechanical Properties Of Polyetheretherketone, Andrew I. Deceuster
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Polyetheretherketone (PEEK) is a Federal and Drug Administration (FDA) approved biomaterial that has been used as an orthopedic implant material due to its inherent properties. Laser etching has become a popular means to create identification markers on the individual implants as required by the FDA. The interaction of laser energy with polymeric materials could potentially cause changes in the material's biocompatibility and mechanical properties. The objective of this study was to determine the effect of laser energy on the biocompatibility and mechanical properties of implantable PEEK by measuring contact angle, micro-tensile testing, nite-element modeling (FEM), and biocompatibility testing according to …
Models And Solution Algorithms For Asymmetric Traffic And Transit Assignment Problems, Donghyung Yook
Models And Solution Algorithms For Asymmetric Traffic And Transit Assignment Problems, Donghyung Yook
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Generally, modeling is a simplified representation of the real world; however, this research adds value to the modeling practice by investigating the asymmetric interactions observed in the real world in order to explore potential improvements of the transportation modeling. The enhanced representation of the transportation system by the asymmetric transportation equilibrium problem is promising because there are various asymmetric interactions in real transportation such as intersections, highway ramps, toll roads and in the structure of the transit fares.
The dissertation considers the asymmetric interactions of flows in the traffic and transit assignment problems with an efficient solution algorithm. The study …
Occurrence And Removal Of Ultra-Low Level Hexavalent Chromium In Drinking Water, Christel Olsen
Occurrence And Removal Of Ultra-Low Level Hexavalent Chromium In Drinking Water, Christel Olsen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This project provides insight for drinking water utilities to better understand chromium behavior in their own waters. Seven full-scale treatment plants developed a snapshot profile of chromium behavior and treatability. If ultra-low level Cr6 is to be controlled, the key treatment processes in need of further investigation are lime softening, oxidation by chlorine, chloramines, or permanganate, and reduction-coupled coagulation using ferrous iron.
Chlorine was shown to oxidize ultra-low levels of Cr3 to Cr6 in less than seven hours. The distribution system investigations showed the concentration of Cr6 could change between the point of entry and the tap. It is therefore …
A Survey Of Utah's Public Secondary Education Science Teachers To Determine Their Feelings Of Preparedness To Teach Engineering Design, Roland Tyler Ames
A Survey Of Utah's Public Secondary Education Science Teachers To Determine Their Feelings Of Preparedness To Teach Engineering Design, Roland Tyler Ames
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Education is always changing and science education is no exception, with many influential publications passing through science education over the years. The latest wave in science standards is called the Next Generation Science Standards. The Next Generation Science Standards are anticipated to have a significant effect on state science standards around the entire country. One thing about these new standards is very different from all previous science standards—they include the principle of engineering design in them.
Asking science teachers to teach engineering design is asking them to teach a principle for which their teaching licensure would not have formally prepared …
Bridge Failure Rates, Consequences, And Predictive Trends, Wesley Cook
Bridge Failure Rates, Consequences, And Predictive Trends, Wesley Cook
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The intent of this investigation is to assess the number of bridge collapses in the United States, describe, in a numerical form, negative impacts resulting from collapsed bridges, and, last, analyze conditions of bridges prior to collapse and note similarities. Bridge collapse data is scarcely recorded, as such; an isolated region (New York State) over a period of time (25 years), wherein data has been collected of this nature, was used to determine the number of bridge collapses in the region annually. Probability and statistics were used to estimate the average number of bridge collapses throughout the United States and …
An Efficiency-Motivated Attack Against Vehicles In A Platoon: Local Vehicle Control, Platoon Control Strategies, And Drive Train Technologies Considerations, David A. Cornelio Sosa
An Efficiency-Motivated Attack Against Vehicles In A Platoon: Local Vehicle Control, Platoon Control Strategies, And Drive Train Technologies Considerations, David A. Cornelio Sosa
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Automated Electric Transportation Group (AET) at Utah State University proposes to demonstrate the benefits and feasibility of vehicle platooning. A platoon is a transportation system, formed by vehicles that are controlled automatically by computers (the driver does not operate the vehicle while cruising). Platoons are interesting in view of the future because they present many advantages: increase highway capacity and safety, reduce travel time, save energy, and reduce stress for human drivers. There are many problems to solve in order to make vehicle platooning a reality. In this work, the focus is not on making it feasible, but rather …
Spacecraft Guidance Techniques For Maximizing Mission Success, Shane B. Robinson
Spacecraft Guidance Techniques For Maximizing Mission Success, Shane B. Robinson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Traditional spacecraft guidance techniques have the objective of deterministically minimizing fuel consumption. These traditional approaches to guidance are developed independently of the navigation system, and without regard to stochastic effects. This work presents and demonstrates a new approach to guidance design. This new approach seeks to maximize the probability of mission success by minimizing the variance of trajectory dispersions subject to a fuel consumption constraint. The fuel consumption constraint is imposed by formulating the dynamics in terms of a steering command, and placing a constraint on the final time. Stochastic quadratic synthesis is then used to solve for the nominal …
Experimental Studies Of Delta Wing Parameters In Open Channel Raceway Determined Via Validated Computational Fluid Dynamics, Cole David Blakely
Experimental Studies Of Delta Wing Parameters In Open Channel Raceway Determined Via Validated Computational Fluid Dynamics, Cole David Blakely
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A promising feedstock for biofuels is microalgae. The most economical means of cultivating microalgae is via open raceway ponds. However, a large gap in economic feasibility exists between algae-based biofuels and traditional petroleum fuels. Recent research at Utah State University has focused on increasing biomass growth by implementing Delta Wings (DWs). DWs are placed facing the incoming flow, with a 40 degree angle of attack to create large vortices which travel downstream. The trailing vortices increase vertical mixing, which in turn increases algal growth.
Past researchers at USU quantified vertical mixing with new metrics, optimized various raceway operating conditions, and …
Causes And Countermeasures For Nappe Oscillation: An Experimental Approach, Aaron Allan Anderson
Causes And Countermeasures For Nappe Oscillation: An Experimental Approach, Aaron Allan Anderson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Weirs are commonly used as spillways to release flows from a reservoir. The freefalling jet on the downstream side of the weir is called the nappe. Under certain hydraulic conditions, determined mainly by the size, design, and construction of the weir, nappe oscillation, otherwise known as nappe vibration, can occur. Characteristics of this dynamic behavior include excessive acoustic energy manifested as sound pressure waves and lowfrequency noise accompanied by horizontal waves or banding on the nappe. Mitigation of this process may be required, especially if the weir operates in close proximity to occupied structures. Instability of water jets moving through …
Optimization Of Wastewater Microalgae Pretreatment For Acetone, Butanol, And Ethanol Fermentation, Yessica A. Castro
Optimization Of Wastewater Microalgae Pretreatment For Acetone, Butanol, And Ethanol Fermentation, Yessica A. Castro
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Acetone-butanol-ethanol (ABE) fermentation from wastewater microalgae by Clostridium saccharoperbutylacetonicum N1-4 is a novel bioprocess that utilizes waste substrate to generate valuable solvents. Butanol, the most abundant product resulting from ABE fermentation, is an environmentally safe and high performing fuel that can be utilized as a drop-in-fuel; however, high operational costs and low ABE yield present challenge in scale-up of the process. The utilization of algae as a substrate requires pretreatment prior to fermentation to increase the bioavailability of the algal fermentable sugars and to improve the conditions of the pre-fermentation medium. The purpose of this thesis was to optimize wastewater …
Comparison Of Selected Differential Producing, Ultrasonic, And Magnetic Flow Meters, Johnny B. Prettyman
Comparison Of Selected Differential Producing, Ultrasonic, And Magnetic Flow Meters, Johnny B. Prettyman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Flow meters are used to measure flow accurately. There are many different flow meters and it is necessary to know which will function best for specific situations. A wide variety of flow meters were selected for the study to assist in showing that each flow meter has its tradeoffs. The selected meters include: three types of Venturi meters, a wedge meter, a V-cone meter, an electromagnetic flow meter, and an ultrasonic flow meter. The characteristics researched in this study are discharge coefficient (Cd) over a range of Reynolds numbers (Re), head loss across each flow meter, life, and cost of …
Reconfigurable Antennas For Public Safety And Wireless Gigabit Alliance Applications, Hema Swaroop Mopidevi
Reconfigurable Antennas For Public Safety And Wireless Gigabit Alliance Applications, Hema Swaroop Mopidevi
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The main goal of this research is to develop a new type of antenna, called reconfigurable antenna, which can replace multiple antennas required to enhance the effectiveness of a robust communication system. A reconfigurable antenna integrated with switching elements can dynamically change its properties, namely, frequency of operation, radiation pattern (the three-dimensional coverage of antenna), and polarization (the electrical orientation of the antenna). Depending on the requirement, a single antenna can function as multiple antennas, therefore, the name Multi-functional Reconfigurable Antenna (MRA). United States (US) Public Safety (PS) responders (police, fire-fighters, emergency medical services, etc.) can effectively respond to human-made …
Laboratory Modeling Of Erosion Potential Of Earthen Embankments In Contact With Open Bedrock Joints, Joseph T. Zaleski
Laboratory Modeling Of Erosion Potential Of Earthen Embankments In Contact With Open Bedrock Joints, Joseph T. Zaleski
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Earthen dams are often built into bedrock abutments and on bedrock foundations. Bedrock joints naturally occur in bedrock materials. These bedrock joints create voids for ground water to pass through. Historically earthen dams were sometimes built in direct contact with the bedrock joints, causing a contact point between the soil of the dam and the flowing water. It has been engineering practice to place grout into exposed bedrock joints for some time now. However, soil is not always cleaned out of bedrock joints before they are grouted, which leaves a weakness for water to push through.
The purpose of this …
Effect Of Poultry Litter Biochar On Saccharomyces Cerevisiae Growth And Ethanol Production From Steam-Exploded Poplar And Corn Stover, Oumou Diallo
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The use of ethanol produced from lignocellulosic biomass for transportation fuel offers solutions in reducing environmental emission and the use of non-renewable fuels. However, lignocellulosic ethanol production is still hampered by economic and technical obstacles. For instance, the inhibitory effect of toxic compounds produced during biomass pretreatment was reported to inhibit the fermenting microorganisms, hence there was a decrease in ethanol yield and productivity. Thus, there is a need to improve the bioconversion of lignocellulosic biomass to ethanol in order to promote its commercialization. The research reported here investigated the use of poultry litter biochar to improve the ethanol production …
Weir-Baffled Culvert Hydrodynamics Evaluation For Fish Passage Using Particle Image Velocimetry And Computational Fluid Dynamic Techniques, Mohanad A. Khodier
Weir-Baffled Culvert Hydrodynamics Evaluation For Fish Passage Using Particle Image Velocimetry And Computational Fluid Dynamic Techniques, Mohanad A. Khodier
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Due to a recent increase in environmental awareness regarding fish passage through hydraulic structures, including culverts, an evaluation of passage of wild brown trout through a weir-baffled, prototype-scale culvert, was conducted under a variety of culvert slopes and discharge conditions. The influence of the fish sample population and the lengths of the individual fish on passage rates were investigated. The data showed that the fish sample size of 25 per test was sufficiently large to minimize sample size dependency. Fish behavior, including resting/staging zone locations, while traversing the culvert was observed and reported. Two preferable resting zones for the fish …
Bridging The Nano- And Macro-Worlds: Thermal Property Measurement Using Thermal Microscopy And Photothermal Radiometry – Application To Particle-Irradiation Damage Profile In Zirconium Carbide, Colby Bruce Jensen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Multiscaled experimental investigations of heat transfer from nanoscales to macroscales are requisite to progress in energy technologies. In nuclear applications, material properties can undergo significant alteration due to destructive interaction with irradiating particles at microstructural levels that affect bulk properties. This study expands the current knowledge base regarding thermal transport in ion-irradiated materials through the use of a multiscaled experimental approach using four complementary thermal wave methods. For the first time, the in-depth thermal conductivity profile of an ion-irradiated sample is measured directly.
Innovative Payloads For Small Unmanned Aerial System-Based Personal Remote Sensing And Applications, Austin M. Jensen
Innovative Payloads For Small Unmanned Aerial System-Based Personal Remote Sensing And Applications, Austin M. Jensen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Remote sensing enables the acquisition of large amounts of data, over a small period of time, in support of many ecological applications (i.e. precision agriculture, vegetation mapping, etc.) commonly from satellite or manned aircraft platforms. This dissertation focuses on using small unmanned aerial systems (UAS) as a remote sensing platform to collect aerial imagery from commercial-grade cameras and as a platform to track radio-tagged fish. The small, low-cost nature of small UAS enable remotely sensed data to be captured at a lower cost, higher spatial and temporal resolution, and in a more timely manner than conventional platforms. However, these same …