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Articles 1 - 30 of 42
Full-Text Articles in Engineering
An Examination Of The Effects Of Psychological Stress And Anxiety On Physical Activity And Physical Fitness, Lydia Makepeace
An Examination Of The Effects Of Psychological Stress And Anxiety On Physical Activity And Physical Fitness, Lydia Makepeace
Honors Theses
In this study multiple measures of psychological stress, anxiety, physical fitness and physical activity were collected from 25 subjects in order to examine the relationships between stress, anxiety and fitness and between stress, anxiety and physical activity levels. It has long been hypothesized that levels of physical activity and physical fitness are moderators of psychological stress (Da Silva, et al., 2012). It has also been suggested that there is a bidirectional relationship between stress and physical activity and fitness levels (Da Silva, et al., 2012). This study intended to consider the ways that psychological stress may influence physical fitness and …
Optimization Of A Chemical Production Facility: A Study Of Operating Conditions, Equipment Sizing, And Economics Of An Ethylbenzene Production Plant., Xi Peng
Honors Theses
Economics of a chemical plant depend on multiple factors: grade of a feed, types of catalyst, operating temperature and pressure, cost of equipment, and many other factors could have influences on economics of the plant. In a previous study about an ethylbenzene facility, our team scrutinize two proposed changes. An optimization plan is recommended by our team in order to maximize the net present value (NPV) of the plant. This report focuses on demonstrating rationales of setting certain operating conditions, showcasing the details of optimization, and elucidating the reasons behind applying these modifications. The team used simulating software PRO/-II to …
Secondary Metabolites Isolated From Perovskia Atriplicifolia And Their In Vitro Binding Affinity For Human Opioid And Cannabinoid Receptors, Ashli Fitzpatrick
Secondary Metabolites Isolated From Perovskia Atriplicifolia And Their In Vitro Binding Affinity For Human Opioid And Cannabinoid Receptors, Ashli Fitzpatrick
Honors Theses
Plants and their natural products have been utilized for thousands of years in the treatment of many human diseases. Because of their structural diversity, natural products are ideal lead compounds for drug development. In this thesis, the natural products of the plant Perovskia atriplicifolia were investigated, specifically their in vitro binding affinity to receptors in opioid and cannabinoid classes. Extracts that demonstrated good selective opioid and cannabinoid receptor binding were subjected to bioassay-guided fractionation. Four active compounds were identified from the crude extract in Perovskia atriplicifolia: 1) 5-hydroxy-3',4',6,7-tetramethoxy flavone, 2) 5,7-dihydroxy-3',4',6,-trimethoxy flavone, 3) 5-hydroxy-4',6,7-trimethoxy flavone, and 4) 5,7-dihydroxy-4',6,-dimethoxy flavone. Each …
A Gpu Powered Mobile Ar Navigation System, Mengshen Zhao
A Gpu Powered Mobile Ar Navigation System, Mengshen Zhao
Electronic Theses and Dissertations
This thesis presents a real-time Augmented Reality Navigation System(ARNavi) on Android smartphone that leverages the parallel computing power of mobile GPUs. Unlike conventional navigation systems, our proposed ARNavi augments navigation information onto real scene video streaming from device camera in real-time. To achieve this goal, we implement and accelerate compute intensive part of applications using OpenCL on GPU integrated on mobile Application Processor (AP). The contributions of this thesis are three-fold. First, we propose new lane detection algorithm and prediction mechanism based on geometric coordinates. The result shows that these two algorithms are fast and accurate. Second, we port and …
The Investigation Of Okhissa Dam Using A Real-Time Monitoring System, Corey Alexander Hamil
The Investigation Of Okhissa Dam Using A Real-Time Monitoring System, Corey Alexander Hamil
Electronic Theses and Dissertations
According to the National Inventory of Dams (NID), the United States has approximately 87,000 dams. Many of these dams are more than 50 years old and need to be investigated to ensure their safety to the public. A real time monitoring system can obtain a more reliable evaluation of the dam’s performance as well as serve as an early warning system to inform officials of a dam’s condition. Okhissa Dam was selected for investigation using a real-time monitoring system. Okhissa Dam is located in a region that contains both a phreatic aquifer and a confined aquifer. Prior to this investigation …
Graphene Based Metamaterials For Terahertz Cloaking And Subwavelength Imaging, Seyedali Forouzmand
Graphene Based Metamaterials For Terahertz Cloaking And Subwavelength Imaging, Seyedali Forouzmand
Electronic Theses and Dissertations
Graphene is a two-dimensional carbon crystal that became one of the most controversial topics of research in the last few years. The intense interest in graphene stems from recent demonstrations of their potentially revolutionary electromagnetic applications – including negative refraction, subdiffraction imaging, and even invisibility – which have suggested a wide range of new devices for communications, sensing, and biomedicine. In addition, it has been shown that graphene is amenable to unique patterning schemes such as cutting, bending, folding, and fusion that are predicted to lead to interesting properties. A recent proposed application of graphene is in engineering the scattering …
Carbon Dioxide Capture With Amine Functionlized Graphene Oxide, Renee Zeleszki
Carbon Dioxide Capture With Amine Functionlized Graphene Oxide, Renee Zeleszki
Electronic Theses and Dissertations
Abstract: amine functionalized graphene oxide was used as sorbent in order to achieve carbon dioxide capture. In this study, micro size graphite flakes was prepared according to modified hummers method and "hummers' method with additional kmno4." Graphene oxide was then functionalized with ethylenediamine (eda). Different purification methods for graphene oxide were studied as well as different functionalization method times. Graphite oxide and functionalized graphene oxide has been analyzed with fourier transform infrared spectroscopy (ftir) for chemical structure. Thermal gravimetric analysis (tga) was used to test co2 capture capacity. Functionalized graphene oxide that has been purified with 30 washes via centrifuge …
Economic Viability And Societal Benefits Of Integrated Multimodal Freight Corridors And Sustainable Passenger Transportation, Seth Austin Cobb
Economic Viability And Societal Benefits Of Integrated Multimodal Freight Corridors And Sustainable Passenger Transportation, Seth Austin Cobb
Electronic Theses and Dissertations
No abstract provided.
Mcmc- Based Optimization And Application, Xiaobin Wu
Mcmc- Based Optimization And Application, Xiaobin Wu
Electronic Theses and Dissertations
In the thesis, we study the theory of Markov Chain Monte Carlo (MCMC) and its application in statistical optimization. The MCMC method is a class of evolutionary algorithms for generating samples from given probability distributions. In the thesis, we first focus on the methods of slice sampling and simulated annealing. While slice sampling has a merit to generate samples based on the underlying distribution with adjustable step size, simulated annealing can facilitate samples to jump out of local optima and converge quickly to the global optimum. With this MCMC method, we then solve two practical optimization problems. The first problem …
Synthetic Materials With Redox-Triggers For Imaging And Drug Delivery, Jungeun Bae
Synthetic Materials With Redox-Triggers For Imaging And Drug Delivery, Jungeun Bae
Electronic Theses and Dissertations
Synthetic materials embedded with stimuli-responsive cleavable bonds have been extensively utilized for the development of site-targeted drug delivery system and selective imaging reporters. We developed stimuli-sensitive materials with two different redox switches including trimethyl-locked quinone propionic acid and nitrobenzyl moieties. Novel redox-sensitive polymeric nanoparticles and micelles were prepared from a synthesized monomer containing trimethyl-locked quinone propionic acid as a redox trigger. A hydrophobic cancer drug, Paclitaxel, was incorporated into the redox-responsive polymeric nanoparticles and micelles prepared from the synthesize polymers. The effect of redox stress on the nanoparticles and micelles was evaluated with a chemical reductant, sodium dithionite demonstrating that …
Implementation Of A Raptorq-Based Protocol For Peer To Peer Network, Yuzhu Bai
Implementation Of A Raptorq-Based Protocol For Peer To Peer Network, Yuzhu Bai
Electronic Theses and Dissertations
The object of this thesis is to develop and test a Ruby based implementation of the RaptorQP2P protocol. The RaptorQP2P protocol is a novel peer-to-peer protocol based on RaptorQ forward error correction. This protocol facilitates delivery of a single file to a large number of peers. It applies two levels of RaptorQ encoding to the source file before packet transmission. Download completion time using RaptorQP2P was found to be significantly improved comparing to BitTorrent. We developed a Ruby interface to the Qualcomm proprietary RaptorQ software development kit library. Then we achieved the two levels of RaptorQ encoding and decoding with …
Analysis Of Pervious Concrete As A Stormwater Management Tool Using Swmm Modeling, Liya Eshetu Abera
Analysis Of Pervious Concrete As A Stormwater Management Tool Using Swmm Modeling, Liya Eshetu Abera
Electronic Theses and Dissertations
Stormwater runoff occurs when precipitation flows over the ground. Increase in impervious land cover due to urbanization causes excess stormwater runoff and affects the quantity and quality of water bodies. The use of low impact development (lid) controls is highly recommended to reduce the excess volume of stormwater runoff. Lid controls include infiltration techniques such as pervious pavements, evaporation, and storage techniques to reduce the volume of runoff. In this study, an analysis is done for the performance of pervious concrete pavement located at the University of Mississippi Law School parking area. The law school was constructed in 2010 and …
Fiber Compaction And Wetout In Tapered Resin Injection Pultrusion Manufacturing, Naveen Babu Masuram
Fiber Compaction And Wetout In Tapered Resin Injection Pultrusion Manufacturing, Naveen Babu Masuram
Electronic Theses and Dissertations
Pultrusion is a continuous process for manufacturing composite materials with constant cross section. Reinforced fibers are pulled through a resin, possibly folloby a separate injection chamber preforming system, and into a heated die, where the resin undergoes complete wetout. Thus the required pultruded composite is obtained in the desired profile. The main objective of this research is to present a numerical model employing the finite volume technique to simulate the resin flow in a tapered injection chamber through the fiber reinforcement when compaction of the fiber reinforcement is taken into account. The numerical model predicts the impact of design and …
Divergence And Bayes Error Based Soft Decision For Decentralized Signal Detection Of Correlated Sensor Data, Roopa Shree Rajanna
Divergence And Bayes Error Based Soft Decision For Decentralized Signal Detection Of Correlated Sensor Data, Roopa Shree Rajanna
Electronic Theses and Dissertations
No abstract provided.
Design And Synthesis Of Sigma-1 Probe For Positron Emission Tomography (Pet) Imaging, May Ly
Design And Synthesis Of Sigma-1 Probe For Positron Emission Tomography (Pet) Imaging, May Ly
Honors Theses
Sigma-1 receptor radioligands have the potential to detect and monitor various neurological diseases. Because sigma-1 receptors are believed to be associated with numerous psychiatric conditions and neurodegenerative diseases, radioligands for sigma-1 receptors have the potential to serve as novel diagnostic tools and may be useful in assessing treatment effectiveness. A benzothiazolone 18F-labeled sigma-1 receptor ligand, CM304, has demonstrated promise as a specific positron emission tomography radiotracer for visualizing sigma-1 receptors in living subjects. Based on CM304, backup molecules were created to improve the overall drug profile, including half- life and bioavailability.
Delivery Of A Fatty Acid Signal Via Rtil For Biofilm Dispersion, Rachaud M. Keyes
Delivery Of A Fatty Acid Signal Via Rtil For Biofilm Dispersion, Rachaud M. Keyes
Honors Theses
A number of proposed applications for ionic liquids involve ionic liquid/water interfaces, such as, chemical separations or drug delivery systems. Therefore, an understanding of the solubility and micellar behavior of ionic liquids in an aqueous environment is critical fundamental knowledge. The long term goal of our study was ionic liquids for delivery of biological active agents; therefore, we chose the anion, bis(trifluoromethanesulfonyl)imide (Tf2N) since it promotes water stability and forms water immiscible RTILs. The study then paired the Tf2N-anion with three different classes of cations. By adding apolar substituents (-CH2-) to the cation, the size of the molecule increases in …
Targeting G-Quadruplexes Within The Adam-15 Promoter: A Novel Therapeutic Approach For Breast Cancer, Rachel L. Jenkins
Targeting G-Quadruplexes Within The Adam-15 Promoter: A Novel Therapeutic Approach For Breast Cancer, Rachel L. Jenkins
Honors Theses
ADAM-15 is a protein that is up-regulated in many diseases, particularly breast cancer; its over-expression is correlated with more aggressive and invasive phenotypes. The critical core promoter region of ADAM-15 is capable of forming a secondary DNA structure known as a G-quadruplex. The stabilization of this G-quadruplex has the potential to decrease the transcription of the over-expressed ADAM-15 protein. Six hundred forty compounds were screened for their ability to cause a shift in the melting temperature of an ADAM-15 oligonucleotide using FRET melt. Two compounds, NSC 146771 and NSC 260594, produced a significant shift in the melting temperature; further experimentation, …
A Guide To Process Optimization, Shannon Leeann Kynerd
A Guide To Process Optimization, Shannon Leeann Kynerd
Honors Theses
Optimization is improving upon an existing process. Generally, the motivation behind optimization is economical. Companies are always looking for ways to improve their process in order to maximize their profit. There are several key steps and strategies that need to be followed in order to guarantee an optimized process and ultimately the maximum profit. An analysis of the base case is essential to optimization. If the starting point is not fully known, then the amount of progress is not known. The top-down and bottom-up strategies determine the overall procedure for optimization. Top-down begins with the big picture while bottom-up starts …
Optimization: A Perspective On Improving An Ethylbenzene Production Design, Derrick C. Marchant
Optimization: A Perspective On Improving An Ethylbenzene Production Design, Derrick C. Marchant
Honors Theses
The goal of optimization in a chemical process or system involves improving an existing design or a combination of devices. In the case of an established process such as the ethylbenzene production process investigated here, the optimization involves improving an established process and choosing the best available case within a set of constraints that also considers maximizing the economic bottom line. An objective function must be selected for an optimization problem which defines the achievable goal. The objective function of the optimization process presented here is to minimize the estimated annual operating cost (EAOC). An EAOC takes in to account …
Economic Optimization Of An Ethylbenzene Process, Erin L. Dyer
Economic Optimization Of An Ethylbenzene Process, Erin L. Dyer
Honors Theses
This report describes the process of optimizing an existing design for a chemical plant that produces the chemical intermediate ethylbenzene. For an engineer, economic optimization involves manipulating the design variables of a chemical process in order to improve the economic outcome of the project. In this case, the objective of the optimization was to maximize the net present value of the ethylbenzene plant. After analyzing the net present value of the existing design, the team conducted subsequent analyses on the operation of the process, adjusting variables such as temperature, pressure, and flow rate in order to minimize the costs of …
We All Go Home! The Evolution Of Firefighter Accountability Systems, Jeremy Roy
We All Go Home! The Evolution Of Firefighter Accountability Systems, Jeremy Roy
Honors Theses
Accountability is arguably the single most important tool that a fire department has at its disposal. Although accountability systems have been used throughout history, one thing is proven: when there is no accountability system in place, it is only a matter of time before firefighters will get injured, or worse, lose their lives. This work will discuss the history of fire department methodology dealing with the creation of incident management accountability systems. In order to provide historical evidence that lack of an accountability system can cause injury or death, case studies of multiple fire departments that have reported line of …
A Look Into Process Optimization, Joshua Hunter Lambert
A Look Into Process Optimization, Joshua Hunter Lambert
Honors Theses
The goal for this paper is to inform the reader on the optimization process in chemical engineering design. The reader will gain knowledge about the step-by-step process as well as terminology of the optimization journey. Optimization takes a great amount of work, and it can be a daunting task if one gets caught up in the minute details. However, I will show that looking at the big picture will drastically ease the process and make optimizing much simpler. A base case will first be presented. The base case should be modeled using a process simulator, and then an economic analysis …
Chemical Process Optimization For Dummies, Troy Mannino
Chemical Process Optimization For Dummies, Troy Mannino
Honors Theses
Chemical process optimization is a daunting task. The purpose of this work is to summarize and organize successful approaches which may be employed by the chemical process engineer when confronted with optimization problems. In general, optimization is making any process better; common goals are to increase the efficiency or maximize the economic potential of a process. The improvements made to a process during optimization are generally measured in terms of an objective function. Since the purpose of any industrial chemical process is to be profitable, objective functions most often have units of dollars. The objective function is dependent upon changes …
Pervious Vs. Impervious Pavement: An Engineering Approach To Cost Efficiency, William Vanlandeghem
Pervious Vs. Impervious Pavement: An Engineering Approach To Cost Efficiency, William Vanlandeghem
Honors Theses
This research attempts to make a comprehensive comparison between the relatively new breed of pavement, pervious concrete, and asphalt, a more popular and accepted pavement type. Pervious concrete is mainly used as a pavement surface for green purposes; however, this thesis delves into the possibility that pervious concrete may be able to offer benefits that allow the green alternative to be cost efficient as well. The comparison will be made over the entirety of the surface life including each pavement design and the materials used, the surface drainage, and the maintenance of each. The pavements were analyzed from a real …
Modeling Roughness Of Rock Discontinuity Surfaces, Christopher Pickering
Modeling Roughness Of Rock Discontinuity Surfaces, Christopher Pickering
Electronic Theses and Dissertations
The aim of this thesis is to propose a new methodology of quantifying the rock discontinuity condition of roughness through the physically based modeling approach of signal analysis. The development of this method came about after investigation into the use of qualitative categorizations of roughness from the RMR rating system within rock engineering system matrices. In an attempt to assign significant values to these generalized qualitative descriptions, the standard joint roughness coefficient (JRC) profiles were initially examined through basic measurements, such as aperture and ramp angle. Following these initial measurements and identification of inconsistencies in the wave parameters of the …
Computational Finite Element Analysis Of Extreme Loading Response Of Structural Insulated Panel (Sip) Building Subsystems, Kimberly Anne Tanner
Computational Finite Element Analysis Of Extreme Loading Response Of Structural Insulated Panel (Sip) Building Subsystems, Kimberly Anne Tanner
Electronic Theses and Dissertations
In the reconstruction after Hurricane Katrina, the Mississippi Emergency Management Agency (mema) investigated of the possibility of utilizing structural insulated panel (sip) construction for hurricane "cottages" that would be resistant to a category 3 hurricane through a joint project with a local architect, Bruce Tolar, and FMS Engineering, LLC, Mobile, Alabama. The connections between the sip panels, including a cam-locking device comto sip panel construction, were identified as vulnerable under high velocity wind loads. At that time, there were no published guidelines for performing a computational finite element analysis of the sip system, and thus it was not possible to …
Raptorq-Based Multihop File Broadcast Protocol, Roya Lotfi
Raptorq-Based Multihop File Broadcast Protocol, Roya Lotfi
Electronic Theses and Dissertations
The objective of this thesis is to describe and implement a RaptorQ broadcast protocol application layer designed for use in a wireless multihop network. The RaptorQ broadcast protocol is a novel application layer broadcast protocol based on RaptorQ forward error correction. This protocol can deliver a file reliably to a large number of nodes in a wireless multihop network even if the links have high loss rates. We use mixed integer programming with power balance constraints to construct broadcast trees that are suitable for implementing the RaptorQ-based broadcast protocol. The resulting broadcast tree facilitates deployment of mechanisms for verifying successful …
Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies, Corey Isaac Garner
Experimental Validation Of Metasurface Cloak For Dielectric Cylinder At Mircowave Frequencies, Corey Isaac Garner
Electronic Theses and Dissertations
No abstract provided.
Localization Of Sensors In Presence Of Fading And Mobility, Hamzeh Hussain Omari
Localization Of Sensors In Presence Of Fading And Mobility, Hamzeh Hussain Omari
Electronic Theses and Dissertations
The objective of this dissertation is to estimate the location of a sensor through analysis of signal strengths of messages received from a collection of mobile anchors. In particular, a sensor node determines its location from distance measurements to mobile anchors of known locations. We take into account the uncertainty and fluctuation of the RSS as a result of fading and take into account the decay of the RSS which is proportional to the transmitter-receiver distance power raised to the PLE. The objective is to characterize the channel in order to derive accurate distance estimates from RSS measurements and then …
Chemical Process Analysis And Modeling Case Studies: Liquid Diffusion And Thermodynamic Considerations, Connor Redwine
Chemical Process Analysis And Modeling Case Studies: Liquid Diffusion And Thermodynamic Considerations, Connor Redwine
Honors Theses
Two case studies completed under the direction of Jacobs Engineering are presented and discussed. In the first case study, the economics of the installation of an oil cooler are examined. A vapor recovery unit (VRU) for an enhanced oil recovery (EOR) facility in Grieve, WY, will be installed to capture the vapors from an oil tank. With the installation of the VRU, a question arose: would an oil cooler proposed to be installed before the oil tank be necessary? A simulation and economic analysis of the process suggests that oil cooler installation is still economically favorable. When the low pressure …