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Articles 1 - 30 of 57
Full-Text Articles in Engineering
A-Posteriori Estimation Of Random Uncertainty For The Reflection Type Q-Factor Measurements, Darko Kajfez
A-Posteriori Estimation Of Random Uncertainty For The Reflection Type Q-Factor Measurements, Darko Kajfez
Engineering Software
No abstract provided.
The Critical Difference Seismic Design Can Make For A Reinforced Concrete Building Located In Oxford, Mississippi, Naim Daghmash
The Critical Difference Seismic Design Can Make For A Reinforced Concrete Building Located In Oxford, Mississippi, Naim Daghmash
Honors Theses
The Senior Design course at the University of Mississippi requires the completion of a capstone project. One part of the capstone project is a complete structural design of the NOLA, an ongoing construction in the city of Oxford in Mississippi. The course requires the NOLA to be designed according to gravity loads, meaning the forces act in the downward direction towards the earth’s surface. Some loading mechanisms that could occur in a different direction than gravity are seismic loads, which are earthquake-generated loads. I was not required by my instructors to consider the effect of an earthquake on the structural …
A Modular Data Acquisition Device And Biosignal Amplifier Design, Erin Bratu
A Modular Data Acquisition Device And Biosignal Amplifier Design, Erin Bratu
Honors Theses
The purpose of this research project is to revise a previous design of a modular data collection device and to develop a biosignal amplifier for use in EEG research. The primary goals of the device redesign were to address the challenges identified at the conclusion of the previous research and to either reaffirm or update various aspects of the implementation – primarily the main components that make up the device. The amplifier circuitry is designed to provide both amplification of the input signals and preliminary filtering of undesirable noise artifacts caused by common environmental sources. Both the collection device and …
Equivalent Annual Operating Cost Of Reactors In A Discrete Optimized Styrene Process, S Arizona Morgan-Harris
Equivalent Annual Operating Cost Of Reactors In A Discrete Optimized Styrene Process, S Arizona Morgan-Harris
Honors Theses
Beginning in the fall semester, I was a member of a team that simulated and optimized a styrene production process in Microsoft Excel. After the base case was simulated, parametric and topological optimizations were completed. The optimizations had to be completed in a certain order that starts with the reactor section, then move to the separation section, heat recovery section, heating/cooling utilities section, and ends with the water and effluent treatment section. During this project, the first three sections were explored. Optimizing the base case was completed by making these changes to see how they increased the net present value …
Methods Utilizing The Phenomena Of Light Scattering To Measure Microscopic Aluminum Oxide Particle Size In Both Solution And Turbulent Air Flow, Lawrence Edward Deese
Methods Utilizing The Phenomena Of Light Scattering To Measure Microscopic Aluminum Oxide Particle Size In Both Solution And Turbulent Air Flow, Lawrence Edward Deese
Honors Theses
Lawrence Deese: Methods Utilizing the Phenomena of Light Scattering to Measure Microscopic Aluminum Oxide Particle Size in Both Solution and Turbulent Air Flow The purpose of this research project was to measure microscopic aluminum oxide (alumina) particle size both in solution and in air flow. Experimentally, the process of sizing microscopic particles is technically challenging. Two methods were used for measuring the sizes of 4 different manufacturer labeled aluminum oxide particles sizes. The first method was using Dynamic Light Scattering analyzed by a LS Spectrometer to measure the alumina particle size while suspended in solution. The second method was using …
How Moisture Content Levels And Packing Density In Soil Affect Crude Oil Spreads, Shaylin N. Williams
How Moisture Content Levels And Packing Density In Soil Affect Crude Oil Spreads, Shaylin N. Williams
Venture: The University of Mississippi Undergraduate Research Journal
Crude oil spills are one of the most destructive disasters that can occur, and they are extremely difficult to recover from. Many studies focus on what can be done to clean these crude oil spills, but more research should be focused on means of prevention. Currently, very little is known about how the moisture content levels and the packing efficiency of soil can affect an oil spill. These two factors alone can offer a variety of information to environmental agencies, manufacturers, and refineries. Through utilization of a chemical engineering lab, a recording mechanism, and ImagePro software, data was collected and …
The Chevron Bunionectomy For Moderate To Severe Deformity: Effects Of Varying Procedural Factors In Hallux Valgus Correction, Hunter Reed Harrison
The Chevron Bunionectomy For Moderate To Severe Deformity: Effects Of Varying Procedural Factors In Hallux Valgus Correction, Hunter Reed Harrison
Honors Theses
With growing popularity of minimally invasive surgery, the Chevron bunionectomy has been investigated for use in moderate to severe hallux valgus. This study investigates procedural components of lateral release, fixation, and 2nd digit procedures to evaluate effects on outcome. 109 out of 325 patients of a distal Chevron osteotomy with a minimum preoperative IMA of 15° completed the phone survey rating satisfaction and pain levels. Patients were contacted an average of 5.2 years postoperatively. 83% of patients reported being extremely to very satisfied with their outcome. Only 9 patients complained of current foot pain greater than or equal to 5 …
Investigation Of Fouling Mechanisms On Ion Exchange Membranes During Electrolytic Separations, Matthew James Edwards
Investigation Of Fouling Mechanisms On Ion Exchange Membranes During Electrolytic Separations, Matthew James Edwards
Honors Theses
The global water crisis is a major problem in our developing world due to the increasing growth of our global population, the depletion of natural water resources, and the continuing contamination of existing water resources as a result of industrialization. Membrane separation is a potential solution for these issues. Electrodialysis (ED) is a separation process which employs membranes to separate inorganic and organic substances. This study investigated how different fouling agents influenced membrane surface characteristic and separation efficiency within an electrodialysis system. While applicable for waste water, this study focuses on model salt water solutions with various fouling agents added …
Urea Functionalization Of Ultrasound-Treated Biochar: A Feasible Strategy For Enhancing Heavy Metal Adsorption Capacity, Baharak Sajjadi, James William Broome, Wei Yin Chen, Daniell L. Mattern, Nosa O. Egiebor, Nathan Hammer, Cameron L. Smith
Urea Functionalization Of Ultrasound-Treated Biochar: A Feasible Strategy For Enhancing Heavy Metal Adsorption Capacity, Baharak Sajjadi, James William Broome, Wei Yin Chen, Daniell L. Mattern, Nosa O. Egiebor, Nathan Hammer, Cameron L. Smith
Faculty and Student Publications
© 2018 Elsevier B.V. The main objective of a series of our researches is to develop a novel acoustic-based method for activation of biochar. This study investigates the capability of biochar in adsorbing Ni(II) as a hazardous contaminant and aims at enhancing its adsorption capacity by the addition of extra nitrogen and most probably phosphorous and oxygen containing sites using an ultrasono-chemical modification mechanism. To reach this objective, biochar physically modified by low-frequency ultrasound waves (USB) was chemically treated by phosphoric acid (H3PO4) and then functionalized by urea (CO(NH2)2). Cavitation induced by ultrasound waves exfoliates and breaks apart the regular …
Safety Considerations For The Design Of Modern Elevator Systems, Abhijaya Shrestha
Safety Considerations For The Design Of Modern Elevator Systems, Abhijaya Shrestha
Honors Theses
The main purpose of this work is to perform an analysis on elevator safety considerations in the United States. This report introduces the development of elevators through its history, definitions and commonly used concepts in the elevator industry. Elevators are already an important part of day-to-day life for thousands of people and have significant role to play in the future of urbanization due to increasing population density and decreasing real estate. Elevators not only make vertical transportation convenient, but also play an important role in providing accessibility for people with disabilities; so, its safe and reliable operation is very crucial. …
Analysis Of Crush Resistance And Mississippi-Sourced Sands To Determine Potential As Proppant Sands, Ryann C. Lam
Analysis Of Crush Resistance And Mississippi-Sourced Sands To Determine Potential As Proppant Sands, Ryann C. Lam
Honors Theses
Proppant is a media used in hydraulic fracturing to bear in-situ stresses in order to maintain fracture networks, which act as highly permeable pathways for hydrocarbon recovery. Proppant can be made from a variety of materials such as glass, ceramic beads, sand particles, and more. Proppants are characterized by their size, sorting, roundness, and sphericity. These properties help determine the compressive strength of the pack proppant. This study focuses on these properties for natural sand. The purpose of this study is to evaluate the viability of lower-quality sands as proppant sands by testing the affect these properties have on the …
Analysis And Optimization Of A Triple Notch Ultra-Wideband Antenna, Caleb D. Keathley
Analysis And Optimization Of A Triple Notch Ultra-Wideband Antenna, Caleb D. Keathley
Honors Theses
This paper analyzes a microstrip fed triple notch band Ultra-Wideband (UWB) antenna designed with an inverted pi slot and a Defected Microstrip Structure (DMS) Band-Stop Filter (BSF) from the design stage to the testing stage. This paper systematically steps through each phase of the antenna from simulation, to fabrication, and finally testing. The results of the simulation and testing phases are both compared to each other before comparing the entire project's results to the source paper's results. After determining the accuracy of the fabricated antenna, the paper discusses future avenues for optimization of an Ultra Wide-Band antenna.
Tracking Using Fusion Of Multiple Inertial Measurement Units, Jacob Reed Mccall
Tracking Using Fusion Of Multiple Inertial Measurement Units, Jacob Reed Mccall
Honors Theses
The objective of this thesis is to determine the effectiveness of fusing data from multiple inertial measurement units (IMU) to reduce bias and noise with an overall goal of achieving accurate tracking, which is the process of locating a body as it moves in a fixed environment. Every sensor is subject to noise, and each sensor has its own unique set of biases. The thesis presents a systematic overview of the sensors used in this research, which feature linear acceleration, angular acceleration, and a directional sensor, to form an inertial navigation system (INS). Sources of noise and bias that affect …
Damage Detection Using Destructive Testing Of A Reinforced Concrete Slab, Michael Edward Daves
Damage Detection Using Destructive Testing Of A Reinforced Concrete Slab, Michael Edward Daves
Electronic Theses and Dissertations
Visual inspection is one of the primary tools for evaluating the health of bridges as more reach or exceed their intended lifespan. Bridge deterioration must be monitored to ensure continued safety, so owners need maintenance reports to decide on corrective actions. Strategic repair can offer asset managers the benefit of saving money and time; thus, knowing where to locate and what type of repairs can be challenging when relying on visual techniques alone. A tool designed to aid bridge inspectors is the SHE^tm program, which quantitatively measures damage location and severity for any set of time data.
Molecular Simulation Of Graphene Oxide (Go) Nanocarriers For Doxorubicin: Effects Of Ph And Go Pegylation On The Drug Loading, Retention, And Release, Mina Mahdavi
Electronic Theses and Dissertations
Molecular dynamics (MD) simulation as a powerful tool is used to investigate the graphene oxide (GO) based drug delivery system in the process of drug loading, drug carrying and drug release. Doxorubicin (DOX), a widely used anticancer drug, is used as a drug model. The effect of different parameters including pH levels and the oxidation level of GO sheets on the drug loading mechanism is broadly discussed in this study. The drug release from the GO sheet using pH stimulus is explored and results confirmed that GO can release DOX molecules at acidic pH level.
A Study On The Comparison Of Sample Location Of Pultruded Composites Exposed To Corrosive Environment, Md Mahmudul Hasan
A Study On The Comparison Of Sample Location Of Pultruded Composites Exposed To Corrosive Environment, Md Mahmudul Hasan
Electronic Theses and Dissertations
Composite structures may experience different environments during their prolonged service life. These environments may include corrosive, acidic or both or many others that can adversely affect the mechanical properties of the structural composites. Various studies have been done on the environmental effects on the composites but only a few are on structural shaped pultruded composites. More specifically, none of the studies tell anything about the effects of corrosive media on the locations of the structural shaped pultruded composites coupon samples. Hence, this current study focused on two primary objectives, 1) the durability characterization of structural shaped pultruded composites after an …
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 …
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. …
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 …
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 …
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 …
Design And Investigation Of Genetic Algorithmic And Reinforcement Learning Approaches To Wire Crossing Reductions For Pnml Devices, Alexander Keith Gunter
Design And Investigation Of Genetic Algorithmic And Reinforcement Learning Approaches To Wire Crossing Reductions For Pnml Devices, Alexander Keith Gunter
Electronic Theses and Dissertations
Perpendicular nanomagnet logic (pNML) is an emerging post-CMOS technology which encodes binary data in the polarization of single-domain nanomagnets and performs operations via fringing field interactions. Currently, there is no complete top-down workflow for pNML. Researchers must instead simultaneously handle place-and-route, timing, and logic minimization by hand. These tasks include multiple NP-Hard subproblems, and the lack of automated tools for solving them for pNML precludes the design of large-scale pNML circuits.
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.
Evaluating The Use Of Suas-Derived Imagery For Monitoring Flood Protection Infrastructure, Eleanor Mei Dietz
Evaluating The Use Of Suas-Derived Imagery For Monitoring Flood Protection Infrastructure, Eleanor Mei Dietz
Electronic Theses and Dissertations
In the US there are approximately 33,000 miles of levees. This includes 14,500 miles of levee systems associated with US Army Corps of Engineers programs and approximately 15,000 miles from other state and federal agencies. More than 14 million people live behind levees and associated flood prevention infrastructure. Monitoring and risk assessment are an on-going process, especially during times of flood conditions. The city of New Orleans was heavily impacted by Hurricane Katrina in 2005 by storm surges and intense rainfall. The impact of the hurricane was substantial enough to cause levee failure and I-wall toppling where many of the …
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.
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 …
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. …
Mac-Phy Frameworks For Lte And Wifi Networks' Coexistence Over The Unlicensed Band, Hadi Ahmad Kasasbeh
Mac-Phy Frameworks For Lte And Wifi Networks' Coexistence Over The Unlicensed Band, Hadi Ahmad Kasasbeh
Electronic Theses and Dissertations
The main focus of this dissertation is to address these issues and to analyze the interactions between LTE and WiFi coexisting on the unlicensed spectrum. This can be done by providing some improvements in the first two communication layers in both technologies. Regarding the physical (PHY) layer, efficient spectrum sensing and data fusion techniques that consider correlated spectrum sensing readings at the LTE/WiFi users (sensors) are needed. Failure to consider such correlation has been a major shortcoming of the literature. This resulted in poorly performing spectrum sensing systems if such correlation is not considered in correlated-measurements environments.