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Articles 1 - 30 of 35
Full-Text Articles in Engineering
A Self-Powered Foot Mapping Trail Using Piezoelectric Effect, Shardul Harish Modi
A Self-Powered Foot Mapping Trail Using Piezoelectric Effect, Shardul Harish Modi
All ETDs from UAB
Piezoelectric sensors are made from piezo crystals. Some of these crystals are natural, some are synthetic. These crystals are made of quartz, topaz, Rochelle salt and lead titanate. Piezoelectric sensors run on an effect named as piezoelectric effect which occurs in sensor. When a piezoelectric material is placed exposed to mechanical stress, a shifting of the positive and negative charge centers in the material takes place, which then results in an external electrical field. The piezoelectric effect is very useful within many applications that involve the production and detection of sound, generation of high voltages, electronic frequency generation. In the …
Object Detection And Path Detection System For Autonomous Terrain Vehicles, Avinash Kumar Singh
Object Detection And Path Detection System For Autonomous Terrain Vehicles, Avinash Kumar Singh
All ETDs from UAB
Every year’s thousands of people died in road accidents worldwide. The autonomous vehicles provide a better solution for this kind of situations. The autonomous vehicles move freely in an outer environment and perform different types of tasks according to the condition. The moving object detection in real time and perform the action are always considering important part in autonomous vehicles. To demonstrate the concept of the autonomous vehicle, we design an autonomous all-terrain vehicle model. In this thesis, we used the two types of distance measurement sensors i.e. Ultrasonic and Sharp Infrared sensors. These sensors are connected to the Arduino …
Low-Cost Inkjet-Printed Flexible Circuit For Gas Sensing, Sm Mehedee Parvez
Low-Cost Inkjet-Printed Flexible Circuit For Gas Sensing, Sm Mehedee Parvez
All ETDs from UAB
ABSTRACT Logistics management is a major section of a stable business plan. It is responsible for planning, implementing, and controlling the production and distribution processes of the goods. Its function is even more crucial when goods, which are being handled, are perishable products like food and medicine. It is known in the food industry that a large amount of food is wasted during the transportation chain. More often than not, the main reason for foods going spoiled stems from the presence of unwanted gases around the area of storing. Accurate monitoring and controlling of the environmental conditions imposed on perishable …
Development Of A 3d Microphysiologic Liver For Drug Toxicity Testing, Maryrose Kammer
Development Of A 3d Microphysiologic Liver For Drug Toxicity Testing, Maryrose Kammer
All ETDs from UAB
Development of almost all novel effective drug compounds is immensely expensive and time consuming. The process is slowed by the ineffectiveness of current toxicity testing methods, with 80% of drugs undergoing late-stage failure in clinical trials or post-market withdrawal. The leading cause of these failures and withdrawals is due to drug-induced liver injury. Much of drug metabolism occurs in the liver, but there are incredible differences among the metabolic pathways in humans, animal models, and two-dimensional testing platforms. Thus, the current methods are limited to accurately predict in vivo metabolic response of a novel compound. Three dimensional (3D) in vitro …
Planning For Active Transportation At Urban University Campuses, Sunil Terdalkar
Planning For Active Transportation At Urban University Campuses, Sunil Terdalkar
All ETDs from UAB
There are 4,726 institutions for higher education in the United States. Many of these institutions are located in urban environments and often provide limited options for transportation using alternative modes such as transit, bicycling, and walking. As urban university campuses strive to provide high quality accommodations to their students, employees and visitors, a great need exists for the development of comprehensive strategic plans that promote sustainable transportation solutions. Such solutions encourage social interaction, foster healthy living and active commute choices, and reduce the ecological footprint of university campuses on the adjacent local environment. This thesis reviews and summarizes initiatives across …
Role Of Calmodulin In Death Receptor 5-Mediated Apoptosis In Breast Cancer, Romone Markel Fancy
Role Of Calmodulin In Death Receptor 5-Mediated Apoptosis In Breast Cancer, Romone Markel Fancy
All ETDs from UAB
Drug resistant estrogen receptor positive (ER-positive) and triple-negative (TN) breast cancers, are prolific breast cancers with poor clinical outcome. TRA-8 is a death receptor-5 (DR5) specific agonistic antibody with tumoricidal activity in vitro and in vivo, without inducing normal hepatocyte apoptosis. ER-positive and TN breast cancers have a range of sensitivity to TRA-8 mediated cytotoxicity. TRA-8 activation of DR5 leads to DR5 oligomerization that is critical for formation of the death inducing signaling complex (DISC) at the death domain of DR5 and initiation of apoptotic signaling. Calmodulin (CaM) is overexpressed in breast cancer and is involved in regulating breast cancer …
Intraocular Pressure Measurement In Eye By Using Disposable Solid State Pressure Sensor, Anvesh Loka Loka
Intraocular Pressure Measurement In Eye By Using Disposable Solid State Pressure Sensor, Anvesh Loka Loka
All ETDs from UAB
There are many eye infections and eye diseases like Diabetic Retinopathy, Glaucoma, Age-related Macular Degeneration, Cataract, etc., which cause eye blindness. Glaucoma is one of the major eye diseases that can cause complete blindness. According to National Eye Institute (NIH), there are 2.72 million people are suffering from Glaucoma in the U.S. The primary cause for Glaucoma is higher Intraocular Pressure (IOP), so detecting IOP in the early stages is a vital aspect in the assessment of patients at hazard from glaucoma. The instrument used to measure IOP is called Tonometer and usually used for clinical purposes. However, some part …
Characterization Of Thermoplastics For Leaf Spring Application, Marvin Alejandro Munoz
Characterization Of Thermoplastics For Leaf Spring Application, Marvin Alejandro Munoz
All ETDs from UAB
Composite materials, especially thermoplastics, are now used extensively in the automotive industry to replace metal components. Three different glass fiber reinforced thermoplastic composites were compared to obtain an equivalent performance of a steel leaf spring. Polyethylene Terephthalate Glycol (PETG), Polyamide 66 (PA 66) and Polyphenylene Sulfide (PPS) were the matrices considered for this research work. Mechanical testing (tensile, compressive, shear, flexural and moisture absorption) was performed to these three thermoplastic composites concluding that PPS is the best choice since it displayed the best overall properties. Once PPS was selected, a Design of Experiment (DOE), based on three level (3^k) factorial …
A Comparison Of The Bond Strength Of Spun And Static Cast Concrete Specimens, Kalyn Nicole Murray
A Comparison Of The Bond Strength Of Spun And Static Cast Concrete Specimens, Kalyn Nicole Murray
All ETDs from UAB
The purpose of this study is to determine the pullout bond strength of seven wire steel strand in two types of concrete: spun and static cast. It is perceived that the spinning process used in the manufacturing of concrete poles introduces compaction forces that densifies the concrete and hence, improves the steel to concrete bond. Studies have successfully been conducted determining the bond strength of steel and concrete using the pullout test method; however, there are not any studies known of that address centrifugally cast concrete. In order to obtain data for the research, an experimental program was designed to …
Testing And Simulation Of Reinforced Concrete Beams Under Impact Loading, Amin Pahlevannejad
Testing And Simulation Of Reinforced Concrete Beams Under Impact Loading, Amin Pahlevannejad
All ETDs from UAB
According to published data, three million human injuries and deaths occur annually because of motor vehicle crashes (National Highway Traffic Safety Administration). To help lessen the toll of this problem, the Federal Highway Administration (FHWA) has set a goal to improve the safety of roadways. One way to achieve this goal is increasing the use of the LS-DYNA finite element code in cash testing to model three-dimensional motor vehicle crashes. The objective is to protect the vehicle occupants from severe injury by making roadside safety structures more crashworthy. Reinforced concrete is one important part of bridges, barriers, and guardrail materials. …
Design Of An Engineering Stem Training Toolkit, Vamsi Penmetsa
Design Of An Engineering Stem Training Toolkit, Vamsi Penmetsa
All ETDs from UAB
Recent reports proclaim that more students should engage in enrolling in STEM programs at an early stage of schooling. Due to insufficient number of students pursuing in STEM programs, lot of them missing out too early in their educational career. Nine out of every ten adults had at least a high school or general education diploma, but when it comes to a higher degree only one out of every three adults held a higher degree. To overcome this problem, we need to attract more students by implementing scientific STEM projects where they can actively work on and give them a …
Acoustic Resonance Response Of Cast Iron, Siddhartha Biswas
Acoustic Resonance Response Of Cast Iron, Siddhartha Biswas
All ETDs from UAB
Cast iron is the most common as-cast materials used in present time. Various grades of cast iron have been developed by modifying process parameters to meet the property re-quirements. Destructive and nondestructive tests are routinely performed to maintain the integrity of the produced cast iron. Numerical and multiple linear regression models have also been developed to obtain mechanical properties from process variables such as chem-ical composition, cooling rate, liquid metal treatment. The applicability of property predic-tion models were studied by comparing predicted mechanical properties reported in pub-lished literature. Summary of the comparison is reported to guide cast iron producers to …
Alpha Rhythm And The Default Mode Network: An Eeg/Fmri Study, Anthony Dean Bowman
Alpha Rhythm And The Default Mode Network: An Eeg/Fmri Study, Anthony Dean Bowman
All ETDs from UAB
Reports of the relationship between the default mode network (DMN) and alpha power are conflicting in the literature. Our goal for this study was to assess this relationship by analyzing concurrently obtained EEG/fMRI data using hypothesis-independent methods. To accomplish this, we collected fMRI and EEG data during eyes-closed rest in 20 participants aged 19-37 (10 females) and performed independent component analysis on the fMRI data and a Hamming windowed Fast Fourier Transform on the EEG data. We correlated fMRI fluctuations in the DMN with alpha power. Of the six independent components (ICs) found to have significant relationships with alpha, four …
Low Trade-Off Security Schemes To Detect And Neutralize Malicious Modifications In Nano-Cmos Based Integrated Circuits, Nagendra Gunti
Low Trade-Off Security Schemes To Detect And Neutralize Malicious Modifications In Nano-Cmos Based Integrated Circuits, Nagendra Gunti
All ETDs from UAB
Security of Integrated electronics is threatened by the vulnerabilities such as the globalization of the Integrated Circuits (ICs) industry, where a computing chip can be manufactured anywhere in the world. Without trusted foundries, the systems they de- velop cannot necessarily be expected to perform as specified due to the susceptibility to attack by a malicious adversary. The threats which arise from malicious modifica- tions to the IC based computing hardware, can disable the system, leak information or produce malfunctions and also provide a back door entry to embedded systems like Cy- ber Physical System (CPS) or can even deny providing …
An Iterative Pricing Control Scheme For Renewable Integration In Residential Applications Using Inherent Thermal Energy Storage, Justin Michael Hill
An Iterative Pricing Control Scheme For Renewable Integration In Residential Applications Using Inherent Thermal Energy Storage, Justin Michael Hill
All ETDs from UAB
Renewable energy continues to proliferate throughout the world as costs decrease and the public desire for clean energy rises. These sources are intermittent by nature, providing added complexity to its integration with existing grid infrastructure. This paper proposes an iterative pricing and energy consumption strategy between a utility and home energy management (HEM) system, acting on behalf of homeowners, with the goal of easing this integration while also decreasing homeowner energy costs, increasing utility profit and minimizing utility energy storage requirements. The strategy begins with a day-ahead energy cost profile developed by the utility using a mix of traditional and …
A Framework For Social Network Sentiment Analysis Using Big Data Analytics, Bharat Sri Harsha Karpurapu
A Framework For Social Network Sentiment Analysis Using Big Data Analytics, Bharat Sri Harsha Karpurapu
All ETDs from UAB
The primary research of this thesis focused on the development of a Big Data framework for performing sentiment analysis on social networking sites. Over the last decade, social media has been gaining lots of popularity for sharing thoughts and feelings with a user base of over two billion users. Social networking sites such as Twitter, Facebook, and Instagram are increasingly becoming huge repositories of thoughts and opinions on a wide variety of topics. Several public and private organizations, such as Government and companies are attempting to exploit the expressed preferences, opinions, and attitudes regarding politics, commercial products and other matters …
Microporosity Formation Analysis Of Low-Lead And Leaded Copper Alloys, Aaron Kelley
Microporosity Formation Analysis Of Low-Lead And Leaded Copper Alloys, Aaron Kelley
All ETDs from UAB
The theory of predicting the formation of microporosity in specific alloy fami-lies—steel, aluminum, nickel, and magnesium— is particularly well developed, and it has become a common practice over the past several years. Combining a long solidification range, low thermal gradient, high cooling rate, and dissolved gases can lead to significant amounts of microporosity formation in these alloys. The use of the Niyama criterion has become a common tool for predicting the formation of microporosity in these alloy families. While the use of the Niyama criterion to predict microporosity formation has become routine for the alloys stated above, it is still …
Fpga Implementation And Study Of Hardware Trojan In A Closed Loop Control System, Ranveer Kumar
Fpga Implementation And Study Of Hardware Trojan In A Closed Loop Control System, Ranveer Kumar
All ETDs from UAB
A closed-loop system is a primary technology used to automate our critical infrastructure and major industries to improve their efficiency. Their dependability is challenged by probable vulnerabilities in the core computing system. These vulnerabilities can appear on both front (software) and back (hardware) ends of the computing system. While the software vulnerabilities are well researched and documented, the hardware ones are normally overlooked. However, with hardware-inclusive technological evolutions like Cyber-Physical Systems and Internet-of-Things, hardware vulnerabilities should be addressed appropriately. In this work, we present a study of one such vulnerability, called hardware Trojan (HT), on a closed-loop control system. Since …
Electrophysiological Dynamics And Underlying Mechanisms Of Long Duration Ventricular Fibrillation, Ashleigh R. Hood
Electrophysiological Dynamics And Underlying Mechanisms Of Long Duration Ventricular Fibrillation, Ashleigh R. Hood
All ETDs from UAB
Sudden cardiac death claims more than 300,000 lives per year in the US alone. Because it frequently goes unwitnessed, the underlying ventricular fibrillation (VF) may persist for well over 5 minutes (long duration VF, or LDVF) before attempts at defibrillation, and successful defibrillation is often followed by post-shock arrhythmias and refibrillation. The development of novel and effective therapies for LDVF, which represents a significant unmet medical need, remains largely hindered by a relatively poor understanding of the arrhythmogenic onset and maintenance of LDVF, as well as its deleterious sequelae in the context of the whole heart. Prolonged VF has been …
Design, Testing, And Implementation Of Controls And Interface For An Adaptable Exercise Device For People With Physical Disabilities, John Hoyle
All ETDs from UAB
It has been widely noted that physical activity rates have become extremely low, while rates of sedentary life style and obesity have risen. An emerging strategy for improving healthy living has been to convert sedentary screen time into an opportunity for physical activity through active video games (AVGs). People with physical disabilities have consistently shown high incidence of physical inactivity, obesity, and other secondary conditions, and the majority of current exercise devices were not designed to accommodate those with physical disabilities. The current project worked to develop the controls and display interface for a highly adaptable exercise device for those …
Viscosity And Morphology Modification Of Length Sorted Single Walled Carbon Nanotubes In Pib Matrices, Hanxiao Huang
Viscosity And Morphology Modification Of Length Sorted Single Walled Carbon Nanotubes In Pib Matrices, Hanxiao Huang
All ETDs from UAB
ABSTRACT In this work, Single Walled Carbon Nanotubes (SWNT) were separated by length and chirality using an ultracentrifuge technique. The influence of length-separation on the composites’ viscosity and crystallinity behavior was studied. We found that the compo-sites’ viscosity does not increase monotonously with weight fractions. Specifically, in rel-atively small nanotube weight fractions, the dynamic viscosity of the composites was found to be smaller than that of the pure Polyisotublyene (PIB) matrix. The dimension of nanotube bundles and polymer radius of gyration were compared to further study the mechanism of such a viscosity change. It was observed that nanotubes with shorter …
A Mobile App Development Framework For Database Connectivity And High-Level Services, Venkatadri Raparla
A Mobile App Development Framework For Database Connectivity And High-Level Services, Venkatadri Raparla
All ETDs from UAB
Frameworks have been successfully implemented in order to simplify, in part, the software development process. There are many frameworks developed for android platforms, normally targeted towards specific tasks such as login, database connectivity etc. While various frameworks provide developers with the ability to include services into the app during development, the difficulty of doing so increases as the number of frameworks grows larger. Each framework provides one or more services, however integrating those services into the app requires intimate knowledge of all the details present in the framework. When developers include services from more than one framework, the inherent difficulty …
Congestion Quantification Using The National Performance Management Research Data Set, Shaghayegh Rostami Hosuri
Congestion Quantification Using The National Performance Management Research Data Set, Shaghayegh Rostami Hosuri
All ETDs from UAB
Traffic congestion is a serious urban transportation problem, compounded by the fact that demand for travel grows all the time. Monitoring of transportation system performance is a key part of any transportation operation and planning strategy and depends on the estimation of performance measures generated from analysis of large amounts of traffic data. This thesis focused on analyses of travel time data using the Regional Planning Commission of Greater Birmingham travel time database. The goal of this research was to develop an automated process to utilize the National Performance Management Research Data Set (NPMRDS) for generating performance measures for congestion …
Nanoindentation Properties Of Newly Formed Bone Surrounding Dental Implants Treated With E7-Modified Rbmp-2 Peptides, Ryan Doud
All ETDs from UAB
Statement of Purpose: Use of titanium dental implants for treatment of partial or total edentulism has been well documented since the 1980s with consistent long term results. Osseointegration of these implants can be complicated by insufficient bone after healing of extraction sockets or systemic conditions such as osteoporosis or diabetes. Surface modifications, such as grit blasting (mechanical abrasion) or calcium phosphate (CaP) (chemical treatment) can improve healing time and bone quality around an implant. Our study combined a CaP coating with recombinant bone morphogenetic protein-2 (rBMP-2) mimetic peptide and the polyglutamate domain E7. We used nanoindentation to compare the elastic …
Biomechanical Evaluation Of A Novel Sacroiliac Fusion Technique, Douglas Mackenzie Doud
Biomechanical Evaluation Of A Novel Sacroiliac Fusion Technique, Douglas Mackenzie Doud
All ETDs from UAB
Chronic low back pain affects an estimated 70% of adults at some point in their lives, causing lost work time and reducing quality of life [1]. It is believed that sacroiliac joint dysfunction is responsible for persistent low back pain in 10-25% of these cases, and a review of literature by Hansen et al. (2012) found that many current treatment options, both surgical and nonsurgical, do not definitively demonstrate successful pain relief [2]. Surgical fusion is highly invasive, but is a viable option when more conservative treatments do not relieve pain; therefore, there is a need for techniques that will …
Ultra Wideband For High Density Data Communications, Mohammad Awad
Ultra Wideband For High Density Data Communications, Mohammad Awad
All ETDs from UAB
The increase of data collected every second requires a high data transfer system. Every day, 2.5 quintillion bytes of data are created [1]. This huge amount of data is col-lected from different devices and sensors. We proposed a new and novel scheme for a huge data transfer system. Our system introduces a new modulation and demodulations scheme for Ultra Wideband (UWB) communications systems. The main motivation for our scheme is to increase the amount of data collected from biosensors and medical data collections. This novel scheme is based on the Modified Hermite Pulses (MHP). The modulated signal is composed of …
The Effects Of Different Spinal Fusion Instrumentation On Thoracic Vertebrae: A Parametric Finite Element Study, Thomas Henry Ballard
The Effects Of Different Spinal Fusion Instrumentation On Thoracic Vertebrae: A Parametric Finite Element Study, Thomas Henry Ballard
All ETDs from UAB
Proximal junction kyphosis is a condition that can occur after a long spinal fusion, typically seen in deformity correction surgery. Patients are said to exhibit proximal junc-tion kyphosis when the angle between the uppermost instrumented vertebra and two ver-tebra above that is greater than 10°. Proximal junction kyphosis does not always lead to another surgery but can progress and become symptomatic causing pain and discomfort. Symptomatic proximal junction kyphosis is referred to as proximal junction failure, char-acterized by degradation of the adjacent intervertebral disc or collapse of the proximal vertebral body. It is believed that proximal junction kyphosis/failure arises from …
Wet-Lay Process - A Novel Approach To Scalable Fabrication Of Tissue Scaffolds And Reinforcement Membranes, Andrew Thomas Wood
Wet-Lay Process - A Novel Approach To Scalable Fabrication Of Tissue Scaffolds And Reinforcement Membranes, Andrew Thomas Wood
All ETDs from UAB
Fibrous materials received a great deal of interest in the fields of tissue engineering and regenerative medicine due to the beneficial cell-interactions and tunable properties for various biomedical applications. These materials are highly advantageous as they provide a large surface area for cellular attachment, proliferation, high porosity values for cellular in-growth, and the ability to modify the membrane to achieve desired responses to both mechanical loading as well as environmental stimuli. A prominent method currently used to fabricate such membranes is electrospinning which uses electrostatic forces to produce fibers on the range of nanometers giving them high morphological saliency to …
Constant Pv Output By Using Dual Converters For Dc Application, Abdullah Masoud Alghamdi
Constant Pv Output By Using Dual Converters For Dc Application, Abdullah Masoud Alghamdi
All ETDs from UAB
The energy from solar panels can be improved to extract more power by using DC-DC converters operating in continuous mode. DC-DC converters which generate fixed DC voltage were selected to observe the photovoltaic operation at maximum power point (MPP). In this thesis, a boost converter and a buck converter are cascaded to step-up then step down voltage from a photovoltaic (PV) array with changeable voltage, irradiance, and temperature, to a 24 V DC. The filtering parameters of the converter were computed and the means which is used as a switch is a metal oxide semiconductor field effect transistor (MOSFET) with …
Simulation Of An Energy Conservation Approach For Modification Of Air Conditioning System Employing Preheat Tanks And A Chilled Water Storage System, Zhuo Li
All ETDs from UAB
Energy conservation has been a hot topic worldwide since the energy crisis occurred in the 1970s that the realization natural energy resources will be consumed in the future. With the rapid growth of population and urbanization, the energy demand is increasing annually. Due to the increasing energy demand, the cost of energy will likely continue to increase and fluctuate at higher prices, leading to large financial pressure, not only to the industry, but also to educational institutions and households. The air conditioning system is an important component for domestic and nondomestic buildings that requires a large amount of energy and …