Engineering Commons^™

Euler-Lagrange Optimal Control Of Indirect Fire Symmetric Projectiles, Austin L. Nash

Graduate Theses - Mechanical Engineering

An important aspect of controls engineering is the dynamic modeling and flight control of smart weapons. One division of this area involves the guidance, navigation, and control of smart projectiles. In recent decades, methods for controlling projectiles have become much more sophisticated. In this thesis, principles of optimal control are used to develop a controller for indirect fire symmetric projectiles, or high-launch projectiles. A plant model is created to simulate the flight of a 2.75-inch Hydra-70 rocket. Two pairs of forward-mounted controllable canards are used as actuators to modify the flight toward a downrange target. A linear optimal regulator is …

Ensc 110 (Energy In Perspective) Bibliography, Supplementary Reading, Adam Liska

Adam Liska Papers

Energy, Thermodynamics, Complexity, Evolution, & Astronomy
Energy & Technology
Energy: Petroleum & Coal
Bioenergy, Animals, & Food
Energy & Environment
Energy & Climate Change
Energy, Oil Security, & War
Energy & Societal Collapse

Bibliography of 47 monographs

Ensc 300 (Energy Seminar) Annotated Bibliography, Supplementary Reading, Adam Liska

Adam Liska Papers

Innovation
Sociology of Innovation, Business, & Work
Sustainable Business Strategy
Leadership
Science, Engineering, & Business History
Economics
Energy, Business, & Environmental Policy
Climate Change & Insurance
Education
Ethics

62 monographic resources

Titanium Dioxide Nanoparticles Trigger Loss Of Hepatic Function And Perturbation Of Mitochondrial Dynamics In Primary Hepatocytes, Vaishaali Natarajan

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

Titanium dioxide (TiO₂) nanoparticles are one of the most highly manufactured nanomaterials in the world with applications in copious industrial and consumer products. The liver is a major accumulation site for many nanoparticles, including TiO₂, directly through intentional ingestion or indirectly through increased environmental contamination and unintentional ingestion via water, food or animals. Growing concerns over the current usage of TiO₂ coupled with the lack of mechanistic understanding of its potential health risk is the motivation for this study. Here we determined the toxic effect of three different TiO₂ nanoparticles (commercially available rutile, anatase …

Engineering Of Lipid Nanoparticles For Advanced Drug Deilvery Applications, Stephen L. Hayward

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

‘Nanomedicine’, the application of nanotechnology principles to the field of medicine, has stimulated the development of nano-platforms for next generation drug delivery. By exploiting nanoscale properties of materials to selectively alter intrinsic characteristics of therapeutics, researchers have improved the efficacy and pharmacokinetic profiles for a variety of drug types. Despite preliminary commercial and clinical success, there still remains a need to develop an improved delivery platform that can provide high cargo entrapment, efficient intracellular delivery, evasion of intracellular degradation pathways, and provide cell population specific targeting.

In this study we engineered a nanocarrier system composed of a core bilayer structure …

Efficient Method To Cool The Data Center Using Solar Energy, Krishna Ketanbhai Desai

Mechanical and Aerospace Engineering Theses - Archive

Solar energy is the only source which is abundantly available and which can be used to power a cooling system that is based on absorption cycle. Solar cooling system can be used to provide refrigeration for food and medicines and comfort cooling also. Such systems are speci cally applicable to the large applications having large cooling loads for particularly big periods of a year. Peak demand for the cooling of a building and the highest availability of solar radiation are in similar phase, which makes solar cooling of any building a potential energy source and also a green solution. In …

Multiphase Flow Modeling And Analysis Of Filling Process For Pulsed Detonation Engines, Swati Chandran Thirumangalath

Mechanical and Aerospace Engineering Theses - Archive

The filling process of a pulsed detonation engine with fuel and oxidizer should be carried out quickly in order to maintain a high frequency of operation. The objectives of this research were to model an efficient inlet system for filling the detonation tube with fuel/air mixture in stoichiometric ratio and to evaluate various filling schemes. Numerical modeling of the filling process was done using PointwiseTM for meshing and FluentTM as the flow solver, solving the Reynolds-averaged Navier-Stokes equations with a k-? turbulence model. Five different filling configurations were studied, including endwall, normal and angled, opposing and staggered sidewall. The fuel …

Improving Queueing Implementation On High Speed Switches, Wendy Hernandez

Theses and Dissertations - UTB/UTPA

In this thesis two different conventional shared memory allocation schemes - Dynamic Threshold (DT) and Threshold-based Filtering (TF) - are evaluated under varied traffic conditions in order to determine the optimal configuration for each tested scenario. The effect that a changing ABL, load, and ratio between buffer size and ports have on the packet loss is observed for buffer sharing schemes DT and TF schemes. This allowed to easily determining the Alpha and Thresholds required by DT and TF schemes respectively to obtain an optimal configuration under each of the different tested scenarios. A new shared memory allocation scheme referred …

Proper Orthogonal Decomposition For Incompressible And Compressible Flows, Seyed Milad Rafieinaini

Theses and Dissertations - UTB/UTPA

In this project, reduced order modelling technique has been used to investigate incompressible and compressible flows. At first, Proper Orthogonal Decomposition (POD), Singular Value Decomposition (SVD) and Principal Component Analysis (PCA) have been used to analyze pulsed jet flow as an incompressible flow and supersonic impinging jet as a compressible flow. Then, two flows have been investigated from physics point of view and finally the link between physics of flows and modes have been studied. All investigations have been done based on the given data from Particle Image Velocimetry (PIV). These data have been analyzed by using MATLAB®. Finally, the …

Designing A Clarifier To Recover Wastewater Algae Biomass For Production Of Biofuels, Elizabeth Martinez

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The Logan Lagoons, Logan City’s Wastewater Treatment Facility ensures 15 million gallons of wastewater are cleaned and filtered each day. With the implementation of new and stricter wastewater effluent standards, the city of Logan now has to guarantee the phosphorous concentration in the effluent is also reduced. Algal biomass produced and harvested from the lagoons has been proven to affect the way nitrogen and phosphorous are removed, while having the potential to be converted to biofuels. Therefore, implementing a secondary type clarifier in the Logan Lagoons would produce treated water with a reduced phosphorous concentration, and algae feedstock for biofuel …

Micro-Policies: Formally Verified, Tag-Based Security Monitors, Arthur Azevedo De Amorim, Maxime Denes, Nick Giannarakis, Cătălin Hriţcu, Benjamin C. Pierce, Antal Spector-Zabusky, Andrew Tolmach

Computer Science Faculty Publications and Presentations

Recent advances in hardware design have demonstrated mechanisms allowing a wide range of low-level security policies (or micro-policies) to be expressed using rules on metadata tags. We propose a methodology for defining and reasoning about such tag-based reference monitors in terms of a high-level “symbolic machine,” and we use this methodology to define and formally verify micro-policies for dynamic sealing, compartmentalization, control-flow integrity, and memory safety; in addition, we show how to use the tagging mechanism to protect its own integrity. For each micro-policy, we prove by refinement that the symbolic machine instantiated with the policy’s rules embodies a high-level …

Phase-Control Of A Rising Sun Magnetron Using A Modulated, Addressable, Current Source, Sulmer Fernandez-Gutierrez, Jim Browning, Ming-Chieh Lin, David N. Smithe, Jack Watrous

Electrical and Computer Engineering Faculty Publications and Presentations

It has been proposed that the use of gated field emitters with a faceted cathode in place of the conventional thermionic cathode could be used to control the current injection in a magnetron, both temporally and spatially. In this work, this concept is studied using the particle-in-cell code VORPAL. The magnetron studied is a ten-cavity, rising sun magnetron, which can be modeled easily using a 2D simulation. The magnetron has a ten-sided faceted cathode. The electrons are injected from three emitter elements on each of the ten facets. Each emitter is turned ON and OFF in sequence at the oscillating …

Channel Estimation And Optimal Training Design For Correlated Mimo Two-Way Relay Systems In Colored Environment, Rui Wang, Meixia Tao, Hani Mehrpouyan, Yingbo Hua

Electrical and Computer Engineering Faculty Publications and Presentations

In this paper, while considering the impact of antenna correlation and the interference from neighboring users, we analyze channel estimation and training sequence design for multi-input multi-output (MIMO) two-way relay (TWR) systems. To this end, we propose to decompose the bidirectional transmission links into two phases, i.e., the multiple access (MAC) phase and the broadcasting (BC) phase. By considering the Kronecker-structured channel model, we derive the optimal linear minimum mean-square-error (LMMSE) channel estimators. The corresponding training designs for the MAC and BC phases are then formulated and solved to improve channel estimation accuracy. For the general scenario of training sequence …

Pdms Microchannel Scaffolds For The Isolation Of Individual Axon Regeneration, Bong Kyun Kim

Theses and Dissertations - UTB/UTPA

Injuries to the peripheral nervous system often result in the loss of sensory or motor function within the effected nerve. Nerve scaffolds provide the mechanical support and topographical cues to axon regeneration such that the gap within the injured nerve is bridged and functional recovery is restored. The Microchannel Peripheral Nerve Scaffold, µPNS, was fabricated from PDMS using micromachining techniques that allow for the unprecedented control of microchannel dimensions and paths and therefore, the production of highly customizable Nerve scaffolds for peripheral nerve regeneration applications. The device was then implanted within the sciatic nerves of a series of Lewis rats, …

Weak Magnetic Field Accelerates Chromate Removal By Zero-Valent Iron, Pian Feng, Xiaohong Guan, Yuankui Sun, Wonyong Choi, Hejie Qin, Jianmin Wang, Junlian Qiao, Lina Li

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Weak magnetic field (WMF) was employed to improve the removal of Cr(VI) by zero-valent iron (ZVI) for the first time. The removal rate of Cr(VI) was elevated by a factor of 1.12-5.89 due to the application of a WMF, and the WMF-induced improvement was more remarkable at higher Cr(VI) concentration and higher pH. Fe2+ was not detected until Cr(VI) was exhausted, and there was a positive correlation between the WMF-induced promotion factor of Cr(VI) removal rate and that of Fe²⁺ release rate in the absence of Cr(VI) at pH 4.0-5.5. These phenomena imply that ZVI corrosion with Fe^{2+ …}

Hiding Private Locations By Anonymizing Data, Kelly J. Clifton, Steven R. Gehrke

TREC Project Briefs

Researchers explore ways of masking private locations in the interest of making useful data publicly available.

Community Engagement, Environmental Education, And Public Outreach In Sustainable Engineering : A Collaborative Demonstration Project For Water Treatment Using Natural Processes And Sustainable Materials., Venkata Durga Prasad Gullapalli

Electronic Theses and Dissertations

Community engagement through environmental education for the public is an important component in the link between individual citizens, their community, and local government agencies responsible for maintaining urban recreation and park areas. Streams and waterways passing through urban areas are often misunderstood by the public in terms of whether the waterway is natural, constructed, or a combination of both. Additionally, aspects of water quality or water pollution are often obscure to the community and there are limited means to provide direct information to the public. In any case, the public are often drawn to interact with urban streams through recreation …

Development Of A Surrogate Bruising Detection System To Describe Potential Bruising Patterns Associated With Common Childhood Falls., Raymond Dsouza

Electronic Theses and Dissertations

Child abuse is a leading cause of fatality in children aged 0-4 years. An estimated 1,700 children die annually as a result of child abuse of which threequarters (75.7%) of the children were younger than 4 years old1. Infants (younger than 1 year) had the highest rate of fatalities among the group. Many of the serious injuries and fatalities could have potentially been prevented if clinicians and child protective services were able to better distinguish between injuries associated with abuse versus those caused by accidents. Missed cases of child abuse have been shown to be as high as 71% of …

Shape Analysis Of The Human Brain., Matthew Joseph Nitzken 1987-

Electronic Theses and Dissertations

Autism is a complex developmental disability that has dramatically increased in prevalence, having a decisive impact on the health and behavior of children. Methods used to detect and recommend therapies have been much debated in the medical community because of the subjective nature of diagnosing autism. In order to provide an alternative method for understanding autism, the current work has developed a 3-dimensional state-of-the-art shape based analysis of the human brain to aid in creating more accurate diagnostic assessments and guided risk analyses for individuals with neurological conditions, such as autism. Methods: The aim of this work was to assess …

Simulation-Based Optimization Of Mitigation Strategies For Pandemic Influenza., Arsalan Paleshi

Electronic Theses and Dissertations

Millions of people have been infected and died as results of influenza pandemics in human history. In order to prepare for these disasters, it is important to know how the disease spreads. Further, intervention strategies should be implemented during the pandemics to mitigate their ill effects. Knowledge of how these interventions will affect the pandemic course is paramount for decision makers. This study develops a simulation-based optimization model which aims at finding a combination of strategies that result in the best value for an objective function of defined metrics under a set of constraints. Also, a procedure is presented to …

Face Modeling For Face Recognition In The Wild., Eslam Abdelfattah Mostafa

Electronic Theses and Dissertations

Face understanding is considered one of the most important topics in computer vision field since the face is a rich source of information in social interaction. Not only does the face provide information about the identity of people, but also of their membership in broad demographic categories (including sex, race, and age), and about their current emotional state. Facial landmarks extraction is the corner stone in the success of different facial analyses and understanding applications. In this dissertation, a novel facial modeling is designed for facial landmarks detection in unconstrained real life environment from different image modalities including infra-red and …

Bi-Stable Buckled Energy Harvesters Actuated Via Torque Arms., Daniel Allen Porter

Electronic Theses and Dissertations

Vibrational energy harvesters (VEH) are one way to generate electricity. Though the energy quantities are not enough to run desktop computers, they can power remote devices such as temperature, pressure, and accelerometer sensors or power biological implants. New versions of the Bluetooth protocol can even be used with VEH technology to send wireless data. An important aspect of VEH devices is the power output, operating frequency, and bandwidth. This dissertation investigates a novel method of actuating the primary buckled energy harvesting structure using torque arms as a force amplification mechanism. Buckled structures can exhibit snap-through and has the potential to …

Computational Methods To Predict And Enhance Decision-Making With Biomedical Data., Behnaz Abdollahi

Electronic Theses and Dissertations

The proposed research applies machine learning techniques to healthcare applications. The core ideas were using intelligent techniques to find automatic methods to analyze healthcare applications. Different classification and feature extraction techniques on various clinical datasets are applied. The datasets include: brain MR images, breathing curves from vessels around tumor cells during in time, breathing curves extracted from patients with successful or rejected lung transplants, and lung cancer patients diagnosed in US from in 2004-2009 extracted from SEER database. The novel idea on brain MR images segmentation is to develop a multi-scale technique to segment blood vessel tissues from similar tissues …

Speech Data Analysis For Semantic Indexing Of Video Of Simulated Medical Crises., Shuangshuang Jiang

Electronic Theses and Dissertations

The Simulation for Pediatric Assessment, Resuscitation, and Communication (SPARC) group within the Department of Pediatrics at the University of Louisville, was established to enhance the care of children by using simulation based educational methodologies to improve patient safety and strengthen clinician-patient interactions. After each simulation session, the physician must manually review and annotate the recordings and then debrief the trainees. The physician responsible for the simulation has recorded 100s of videos, and is seeking solutions that can automate the process. This dissertation introduces our developed system for efficient segmentation and semantic indexing of videos of medical simulations using machine learning …

An Island-Based Approach For Rna-Seq Differential Expression Analysis., Abdallah Eteleeb

Electronic Theses and Dissertations

High-throughput mRNA sequencing (also known as RNA-Seq) promises to be the technique of choice for studying transcriptome profiles, offering several advantages over old techniques such as microarrays. This technique provides the ability to develop precise methodologies for a variety of RNA-Seq applications including gene expression quantification, novel transcript and exon discovery, differential expression (DE) and splice variant detection. The detection of significantly changing features (e.g. genes, transcript isoforms, exons) in expression across biological samples is a primary application of RNA-Seq. Uncovering which features are significantly differentially expressed between samples can provide insight into their functions. One major limitation with the …

Nanoscale Electrode Architectures For Electrochemical Energy Conversion And Storage., Venkat Kalyan Vendra

Electronic Theses and Dissertations

Nanoscale electrode architectures are at the heart of photoelectrochemical devices converting sunlight into electricity and electrochemical devices that store energy. Advanced nanomaterials encompassing 1-D architectures such as single crystalline metal oxide nanowires, 2-D architectures such graphene nanosheets and nanoparticle-nanowire hybrids have garnered significant interest as promising materials for fabricating thicker electrodes due their unique electronic, phase transformation and strain relaxation properties. However, electrode architectures incorporating these advanced nanomaterials will have a transformational impact on large scale electrode manufacturing only if the challenges associated with the electrode durability are addressed. At a fundamental level, the reactions happening at the electrode-electrolyte interface …

A Forensics Software Toolkit For Dna Steganalysis., Marc Bjoern Beck

Electronic Theses and Dissertations

Recent advances in genetic engineering have allowed the insertion of artificial DNA strands into the living cells of organisms. Several methods have been developed to insert information into a DNA sequence for the purpose of data storage, watermarking, or communication of secret messages. The ability to detect, extract, and decode messages from DNA is important for forensic data collection and for data security. We have developed a software toolkit that is able to detect the presence of a hidden message within a DNA sequence, extract that message, and then decode it. The toolkit is able to detect, extract, and decode …

3d-Reconstruction Of Human Jaw From A Single Image : Integration Between Statistical Shape From Shading And Shape From Shading., Mohamad Ghanoum 1990-

Electronic Theses and Dissertations

Object modeling is a fundamental problem in engineering, involving talents from computer-aided design, computational geometry, computer vision and advanced manufacturing. The process of object modeling takes three stages: sensing, representation, and analysis. Various sensors may be used to capture information about objects; optical cam- eras and laser scanners are common with rigid objects, while X-ray, CT and MRI are common with biological organs. These sensors may provide a direct or indirect inference about the object, requiring a geometric representation in the computer that is suitable for subsequent usage. Geometric representations that are compact, i.e., capture the main features of the …

Alkali-Silica Reaction Mitigation Using High Volume Class C Fly Ash, Sydney Marie Dickson

Civil Engineering Undergraduate Honors Theses

Fly ash is the residue produced from coal combustion in electric generating plants. There are two types of fly ash, Class C and Class F. Approximately 40 percent of fly ash generated from coal combustion can be used as a partial replacement of cement in concrete. Incorporating fly ash improves concrete properties and extends its service life. Alkali-silica reaction (ASR) is an expansive reaction between reactive silica typically found in aggregates (rock and sand) and alkalis in cement. This reaction results in the formation of a gel that absorbs water and swells, which exerts an internal pressure in concrete. This …

Analyzing Stochastically Generated Material Properties For The Use In Mumerical Simulations Of Advanced Laboratory Tests Of Asphalt Concrete, Ken K. Rutabana

Civil Engineering Undergraduate Honors Theses

For such a large country as the US, adequate road transportation is a vital necessity that ensures the safety, prosperity, and development of the people. Covering 94% of the two million miles of paved roads and highways, asphalt concrete is essential to this country. This is one reason why it is crucial to understand the potential and limitations of asphalt concrete. Unfortunately, material testing is a costly and time consuming ordeal. Consequently, numerical modeling of asphalt testing using computer software has been successfully developed in the last decades. These models corroborate those obtained in the lab but are intended as …