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Articles 31 - 57 of 57
Full-Text Articles in Engineering
Investigative Study Of Poly(Ionic) Liquid Incorporation In Resin Wafer Electrodeionization For Improved Specific Energy Consumption, Angela Fasuyi
Investigative Study Of Poly(Ionic) Liquid Incorporation In Resin Wafer Electrodeionization For Improved Specific Energy Consumption, Angela Fasuyi
Electronic Theses and Dissertations
An electrokinetic separation method known as Resin Wafer Electrodeionization (RW-EDI) is recognized as a promising technology for energy efficient desalination of brackish water. However RW-EDI is limited by an inherent drawback of its ion exchange media that prevents the largescale deployment of this technology. This research was undertaken to optimize the conventional resin wafer used in RW-EDI through the incorporation of high conducting polyionic liquids (PILs). It was hypothesized that by the changing non-conducting polyethylene binder with a PIL binder in conventional resin wafer configurations ion conductivity within the resin bed would be enhanced and could lead to an improvement …
Automation Of Data Collection From An Anechoic Chamber, Thomas S. Garner
Automation Of Data Collection From An Anechoic Chamber, Thomas S. Garner
Electronic Theses and Dissertations
This paper describes the calibration methods and the process that is used on the Ole Miss electrical engineering anechoic chamber. Furthermore the MATLAB code that operates the anechoic chamber has been updated to collect sweep data. The GUI also now includes a tab for calibration giving the user the ability to calibrate for their desired frequency range for when there is not sufficient calibration data already available.
Investigating The Use Of Passive Acoustics As A Surrogate Method Of Monitoring Coarse Bedload Transport In Rivers And Streams Via Laboratory Experiments And Field Studies, Bradley Goodwiller
Investigating The Use Of Passive Acoustics As A Surrogate Method Of Monitoring Coarse Bedload Transport In Rivers And Streams Via Laboratory Experiments And Field Studies, Bradley Goodwiller
Electronic Theses and Dissertations
The movement of coarse gravel in rivers in streams is important for many applications including wildlife habitation, river morphology, infrastructure maintenance and marine navigation. Physical sampling remains the most accurate method of determining coarse bedload transport but it can be expensive, dangerous and flow intrusive. Surrogate methods of monitoring bedload transport is an active area of research worldwide. One such method is the use of passive acoustics to record the sound generated when gravel particles in motion impact each other or the particles on the bed. This dissertation presents research and development that has been conducted on three key areas …
Raptor Codes For Biawgn Channel: Snr Mismatch And The Optimality Of The Inner And Outer Rates, Hussein Fadhel
Raptor Codes For Biawgn Channel: Snr Mismatch And The Optimality Of The Inner And Outer Rates, Hussein Fadhel
Electronic Theses and Dissertations
Fountain codes are a class of rateless codes with two interesting properties, first, they can generate potentially limitless numbers of encoded symbols given a finite set of source symbols, and second, the source symbols can be recovered from any subset of encoded symbols with cardinality greater than the number of source symbols. Raptor codes are the first implementation of fountain codes with linear complexity and vanishing error floors on noisy channels. Raptor codes are designed by the serial concatenation of an inner Luby trans-form (LT) code, the first practical realization of fountain codes, and an outer low-density parity-check (LDPC) code. …
Studies Related To Chemical Changes In Biochar. I. Polyacrylonitrile Internal Standard To Assess Chemical Changes In Graphene Oxide. Ii. Ultrasonic Effects On Polycyclic Aromatic Hydrocarbons As Models For Biochar, Kaci B. Crawford
Honors Theses
Biochar has become an increasing area of research due to its reactive edges from stacks of graphene clusters. One particular area of interest in biochar is because it is a potent soil amendment which reduces soil acidity and can reduce greenhouse gas emissions from plants. Also, chemically-modified biochar is being studied as a carbon storage method to potentially mitigate climate change. In order to understand the chemistry that takes place on biochar’s reactive edges during modification, a standard is essential. This research attempted to identify an internal standard that could be added to biochar samples to quantify chemical changes by …
The Nola Development: Stormwater Management And Green Alternative Designs, Davis P. Odle
The Nola Development: Stormwater Management And Green Alternative Designs, Davis P. Odle
Honors Theses
In the design for any development, the management of storm and wastewater is crucial in creating a viable product. The NOLA complex is a development in Oxford, MS that consists of residential as well as commercial units. The stormwater management systems designed for this facility include: an underground storage device, separate ductile iron pipes for the stormwater and wastewater outflows, a rain garden for green alternative storage. The underground storage system is designed for the 500-year storm and to fit under the southwest parking lot on the site. The stormwater outflow pipe will be designed for the 100-year storm, while …
Hydrogen Production By His Mutants Of Artificial Hydrogenase, Emory Elizabeth Wills
Hydrogen Production By His Mutants Of Artificial Hydrogenase, Emory Elizabeth Wills
Honors Theses
Nickel enzymes are relatively new to be studied, but they have been found to be useful in creating artificial hydrogenases. Nickel alone can be harmful, but when combined with proteins to create an enzyme, the hope is that through catalysts, hydrogen can be produced for viable energy. The proteins used in the experiments had respective mutations at points 113 and 26. The cysteine at both of these points was replaced by a histidine to hopefully enhance metal binding. To create artificial hydrogenases and produce energy, the proteins were induced by various metals including nickel, copper, and cobalt. After experimentation and …
Dynamic Code Selection Method For Content Transfer In Deep Space Network, Rojina Adhikary
Dynamic Code Selection Method For Content Transfer In Deep Space Network, Rojina Adhikary
Electronic Theses and Dissertations
Space communications feature large round-trip time delays (for example, between 6.5 and 44 minutes for Mars to Earth and return, depending on the actual distance between the two planets) and highly variable data error rates, for example, bit error rate (BER) of 10−5 is very comand even higher BERs on the order of 10−1 is observed in the deep- space environment. We develop a new content transfer protocol based on RaptorQ codes and turbo codes together with a real-time channel prediction model to maximize file transfer from space vehicles to the Earth stations. While turbo codes are used to correct …
Optimization And Cost Comparison Of Reactor Types In A Styrene Production Process, Claire Lenore Cozadd
Optimization And Cost Comparison Of Reactor Types In A Styrene Production Process, Claire Lenore Cozadd
Honors Theses
The focus of this thesis is to use the equivalent annual operating costs of isothermal, adiabatic, and packed bed reactors in order to determine which reactor is most cost effective in a styrene production process. In order to understand the steps leading up to this comparison, background information is first given regarding chemical engineering design, optimization, and process simulation. This information was necessary for completing the ChE 451 design project, which was to analyze the base case styrene process before optimizing it, in fall 2018. The results of this project are briefly outlined in the second section. The third section …
Discrete Optimization Of A Styrene Production Process, Seth Gray
Discrete Optimization Of A Styrene Production Process, Seth Gray
Honors Theses
This thesis will outline the two phases of my capstone design project for Chemical Engineering. The first goal was to simulate a styrene production process in Excel alongside my group members in ChE 451. During this phase, we looked at startup of the process and the first 12 years of operation. After the base case which included an isothermal reactor, the decision was made to switch to an adiabatic reactor based on net present value evaluations. Discrete optimization took place on the adiabatic reactor and the subsequent process. The second phase of my capstone project was the portion assigned to …
Determination Of Shrinkage Of Fine-Grained Soils Using 3d Scanning Technology, Hemant R. Joshi
Determination Of Shrinkage Of Fine-Grained Soils Using 3d Scanning Technology, Hemant R. Joshi
Honors Theses
Shrinkage Limit is the moisture content parameter in fine grained soil which is related to the volume stability of the soil. The conventional method, ASTM Standard D427-04 that uses mercury has been replaced by wax method, ASTM Standard D4943-02 that uses wax and water or MT-92 that uses spray coating. This modification has certainly minimized safety concerns of the laboratory technicians by avoiding the use of the health hazardous substance, mercury (Hg) but it is not really an economic and convenient method. This thesis proposes a 3D scanning method of determining the shrinkage limit of fine grained soils. The 3D …
Advanced Design And Manufacturing Of Composite High-Powered Rockets, Matthew Whitfield
Advanced Design And Manufacturing Of Composite High-Powered Rockets, Matthew Whitfield
Honors Theses
This thesis covers aspects related to the design and manufacturing of high-powered composite competition rockets. Research related to the project was performed over the course of three years of participation on the University of Mississippi Rocket Rebels competition team. Areas of the project covered include project definition, rocket design, and rocket manufacturing. Project definition covers how to build a team, select a competition, and establish communication, among others. The rocket design portion discusses the work that goes into meeting competition performance requirements, and includes simulations from the 2018-19 Rocket Rebels rocket. The rocket manufacturing portion includes a summary of manufacturing …
Effects Of The America Invents Act And Recent Supreme Court Decisions On Patent Law, Bridgett Roal
Effects Of The America Invents Act And Recent Supreme Court Decisions On Patent Law, Bridgett Roal
Honors Theses
Due to an interest in pursuing a career in patent law with an electrical engineering background, this thesis describes the 2012 America Invents Act (AIA), which made major changes to patent law in the United States including the switch from “first-to-invent” to “first-to-file” and the creation of the Patent Trial and Appeals Board (PTAB), as well as several relevant key Supreme Court decisions, and explains the impact that these events have caused. Through interviews with attorneys and others in the patent law community, personal research and investigation, and data from the United States Patent and Trademark Office (USPTO), it has …
An Exploration Into The Evolution Of Tutoring, A Comprehensive Business Plan For Launching The Online Tutoring Company Shortwork Llc, And A Post-Operative Analysis Of Shortwork's Business Model, William L. Tribble
Honors Theses
This thesis consists of a review of the history of tutoring and homework up to the modern day; the original business plan used to launch Shortwork LLC, an online tutoring company, in the Spring of 2018; and a post-operative analysis of its business model and executive decision-making, as well as discussion about the future of education. The business plan includes a competitive analysis of the online tutoring market, an overview of Shortwork’s management structure, an explanation of its product model and technology, and both the financial and strategic details of its Spring 2018 plans for 3-year growth. The concluding section …
Decentralized Detection With Correlated Gaussian Observations: Parallel And Tandem Networks With Two Sensors, Shailee Yagnik
Decentralized Detection With Correlated Gaussian Observations: Parallel And Tandem Networks With Two Sensors, Shailee Yagnik
Electronic Theses and Dissertations
Signal detection in cognitive radio involves the determination of presence or absence of a primary user signal so that the secondary user may opportunistically gain access when the spectrum is unoccupied. In decentralized sensing scheme, two or more secondary users sense the spectrum, process individual observation and then pass the quantized data to a fusion center where a decision with regard to which hypothesis being true, that is, a signal being present or absent, is made. In the second part of the thesis, we study Bayes error performance of two-sensor tandem network designed to detect the presence or absence of …
An Improved 3d Complex-Envelope Four-Stage Adi-Fdtd Using The Fundamental Scheme, Qi Liu
An Improved 3d Complex-Envelope Four-Stage Adi-Fdtd Using The Fundamental Scheme, Qi Liu
Electronic Theses and Dissertations
Three corresponding reference methods are developed. The CE explicit FDTD method is used to solve the problem with a point source and perfect electric conductor (PEC) boundaries. The problem with a point source and absorbing boundary conditions (ABC) is solved by the 3D free-space Green's function in the frequency domain, and then transformed to the time domain using the inverse fast Fourier transform (IFFT). For the problem with a plane wave and ABC, the frequency-domain solution is obtained using the volume integral equations and method of moments (VIE-MOM), and is then transformed into the time-domain solution using the IFFT. Comparison …
Magnetic Amphiphiles And Their Potential Applications For Low Energy Separations Processes, Alexander Fortenberry
Magnetic Amphiphiles And Their Potential Applications For Low Energy Separations Processes, Alexander Fortenberry
Electronic Theses and Dissertations
Predicting the behavior of magnetic surfactants in magnetic fields is critical for designing magnetically driven processes such as chemical separations or the tuning of surface tensions. Our work supports the hypothesis that the ability of magnetic fields to alter the interfacial properties of magnetic surfactant solutions depends on the strength of association between the magnetic and surfactant moieties of the surfactant molecules. Our research shows that the stability of a magnetic surfactant in an aqueous environment is dependent upon the type of complex that contains the paramagnetic element and these findings provide valuable insight for the design of magnetic surfactants …
Groundwater Transfer And Injection Pilot Project: Construction Of A Three Dimensional Groundwater Flow Model, Wesley Bluvstein
Groundwater Transfer And Injection Pilot Project: Construction Of A Three Dimensional Groundwater Flow Model, Wesley Bluvstein
Electronic Theses and Dissertations
The Mississippi River Valley Alluvial Aquifer has experienced substantial groundwater declines in eastern Arkansas and northwest Mississippi due largely to irrigation for rice corn soybeans and other water intensive crops. To alleviate groundwater decline and ensure future sustainability of water resources the U.S. Department of Agriculture has in conjunction with the U.S. Geological Survey and the University of Mississippi initiated studies to determine potential avenues of remediation. Options include improved irrigation efficiency installation of surface weirs inter-basin transfers and groundwater transfer and injection. This study develops a three-dimensional groundwater flow model of a withdrawal well adjacent to a river for …
Evaluation Of Wireless Router Antennas And 3d-Printed Simulated Antenna Designs, Bibek Kattel
Evaluation Of Wireless Router Antennas And 3d-Printed Simulated Antenna Designs, Bibek Kattel
Electronic Theses and Dissertations
As the size of the electronics devices is decreasing the overall size of the antenna inside them is also decreasing. As the antenna size becomes smaller it is more difficult to manufacture them with the process of traditional manufacturing that uses the subtractive method to manufacture a structure. This is where additive manufacturing has an edge on traditional manufacturing. The use of this method to manufacture antennas has been discussed in this thesis. Five antennas from a wireless router are evaluated by modeling them in CST Microwave Studio and are modified so that they can be manufactured with 3D printing. …
Hydrophobization Of Cellulose-Based Fibers For Packaging Applications With Alkyl Ketene Dimers (Akd) And Food-Grade Waxes Via Supercritical Impregnation With Carbon Dioxide – Experimental And Thermodynamic Modeling Approaches, Kolawole Adenekan
Electronic Theses and Dissertations
This modified material has applications in food packaging, where frequently water-repellant surfaces are required. This method is preferable to traditional coating methods because it sizes across the entire thickness of the substrate rather than just the surface and can be used for non-planar surfaces; uses significantly less material than traditional methods and will be an excellent technique for multilayered and intelligent coating.
Decoding And Optimizing Magnesium Phosphate Binders For Additive Construction Applications, Hashem Khaled Almashaqbeh
Decoding And Optimizing Magnesium Phosphate Binders For Additive Construction Applications, Hashem Khaled Almashaqbeh
Electronic Theses and Dissertations
This work aims to give more insight about the physical, mechanical, thermal, and chemical performance of the MPC paste composites. Our primary outcome from this research is to improve the MPC composites with different additives, including boric acid, GnP, and acetic acid for potential utilization in 3DcP applications. Furthermore, Martian and Lunar regolith simulants can be mixed with the MPC composites to create mortars as a possible extraterrestrial 3DP in-situ construction material mainly to support the NASA habitation exploration mission.
Utilizing Of Magnesium Oxysulfate Binders For Additive Construction Applications, Hatem Hashem Al-Masaeid
Utilizing Of Magnesium Oxysulfate Binders For Additive Construction Applications, Hatem Hashem Al-Masaeid
Electronic Theses and Dissertations
This dissertation is serving multiple transdisciplinary top-notch material design and technological topics. It is a proof of concept of the feasibility of 3D printing using Magnesium Oxysulfate (MOS) binder as an alternative to the ordinary Portland cement (OPC) to be utilized in terrestrial and extraterrestrial additive construction (AC) fields. MOS paste and mortar are characterized physically, chemically, and mechanically. The characterization results conducted in this research show how MOS’s properties can be controlled to match the 3D printing requirements by manipulating the MOS’s ingredients proportions.
Geothermal Resource Assessment Of Mississippi, Adam Blake Goodwin
Geothermal Resource Assessment Of Mississippi, Adam Blake Goodwin
Electronic Theses and Dissertations
Geothermal energy is exploited through the process of using hot water or steam extracted from reservoirs of geothermal heat in Earth's crust which is derived from the upward convection and conduction of heat from Earth’s mantle and core. This energy can be harnessed to power geothermal heat pumps, heat water, or to generate electricity. Previous geothermal assessments of Mississippi have been locally focused, either in the southern Mississippi River flood plains or in eastern north central Mississippi at an active lignite coal mine. The focus of this project was to calculate and map heat flow estimates within the entire state …
A Numerical Study Of Granular Dam-Break Flows, Nuttita Pophet
A Numerical Study Of Granular Dam-Break Flows, Nuttita Pophet
Electronic Theses and Dissertations
Granular flows are mass movements of mixtures of solid particles and interstitial fluid. Examples include landslides, debris flows and tailings dam-break flows. These types of flows are often catastrophic events, and cover a wide range of phenomena of interest to both scientists and engineers. The mechanical properties of granular materials and the hydraulic behavior of the flows originate from solid and fluid phases, their distribution and interaction. Understanding the behavior of these types of flows and developing reliable predictive models are important.
Design And Analysis Of Efficient Parallel Bayesian Model Comparison Algorithms, Robert Wesley Henderson
Design And Analysis Of Efficient Parallel Bayesian Model Comparison Algorithms, Robert Wesley Henderson
Electronic Theses and Dissertations
Bayesian model comparison provides a rational and consistent method for applying logic and probability to the problem of evaluating models. Model comparison requires numerical techniques that are usually very time consuming to run. This dissertation proposes extensions to several existing numerical model comparison techniques, including nested sampling and thermodynamic integration, that incorporate parallel algorithm design to achieve significant speed-ups. Serial computer performance gains have sloin recent years, and most processing speed improvements are seen in the area of parallel architectures. This work discusses the design, theoretical analysis, and empirical analysis of these algorithms, focusing on the performance of these algorithms …
Molecular Dynamics Study Of Sintering Behavior Of Single-Crystal, Bimetallic Core/Shell Alloy, And Intermetallic Alloy Nanoparticles, Jungmin Jeon
Electronic Theses and Dissertations
There has been rapidly growing interest in the sintering process of nanoparticles (NPs) among academia and modern industry due to their promising applications in additive manufacturing (AM) based on the overall improved properties at nanoscale. In the past decade a lot of experimental and computational work has been conducted to study the sintering process of powder materials. However there is still a significant knowledge gap in a fundamental understanding of the thermodynamics and nanostructural evolution of NPs undergoing additive manufacturing. This thesis aims to gain fundamental insights into melting behavior of different materials including single-crystal bimetallic core/shell alloy and intermetallic …
Developing A Calibrated Seepage Meter To Measure Stream-Aquifer Interaction In The Mississippi Delta, Wesley J. Bolton
Developing A Calibrated Seepage Meter To Measure Stream-Aquifer Interaction In The Mississippi Delta, Wesley J. Bolton
Electronic Theses and Dissertations
The Mississippi Alluvial Plain (MAP) is a premier region for irrigated agriculture in the United States producing approximately 9 billion dollars in annual revenues. The region receives around 138 cm of precipitation annually; however irrigation is necessary to maximize crop yields as most of the precipitation does not occur during the growing season. There are 8 million irrigated acres within the Mississippi Alluvial Plain. The source of most of the irrigated water is the surficial aquifer in the Mississippi Embayment the Mississippi River Valley Alluvial Aquifer (MRVAA) and due to the reliance on irrigation for maximum crop yields recent potentiometric …