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Articles 88741 - 88770 of 197165

Full-Text Articles in Engineering

Evaluation Of Stability Of Unit Loads For Tilt And Shock Events During Distribution, Jay Singh, Koushik Saha, Tyler Sewell, Landon Newton Jan 2017

Evaluation Of Stability Of Unit Loads For Tilt And Shock Events During Distribution, Jay Singh, Koushik Saha, Tyler Sewell, Landon Newton

Industrial Technology and Packaging

Initiatives to lightweight and reduce packaging materials to achieve sustainability goals have created unit load stability challenges in the transportation and handling of palletized packaged goods. Consequently, an increased focus is being placed on evaluating how current pre-shipment performance tests evaluate load stability. This study was undertaken to address the current need for establishing test methodologies towards observing a unit load’s overall stability during transportation and handling related activities commonly experienced in the distribution environment. With this goal, this study developed two test methods as well as apparatus/measuring tool to observe a palletized load’s overall stability. The experimentation involved unit …

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Effect Of Liquid Contamination On Hermeticity And Seal Strength Of Flexible Pouches With Lldpe, Francesca Delle Cese, Koushik Saha, S. Roy, Jay Singh Jan 2017

Effect Of Liquid Contamination On Hermeticity And Seal Strength Of Flexible Pouches With Lldpe, Francesca Delle Cese, Koushik Saha, S. Roy, Jay Singh

Industrial Technology and Packaging

Flexible packaging is a growing successful market and the majority of flexible package applications are for the food industry. The demand for process optimization and reduced production costs, has led to an increase in flexible packaging. However, fast production lines can result in contamination in the seal area. For flexible food packaging, contamination is considered any food particle or substance trapped in the seal area. Current quality control processes can detect contamination in the seal area, but it is not determined if seal contamination affects seal quality. Oil-based and sodium based snack foods are two common categories that can be …

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Characterization Of Thermoplastics For Leaf Spring Application, Marvin Alejandro Munoz Jan 2017

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 …

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A Comparison Of The Bond Strength Of Spun And Static Cast Concrete Specimens, Kalyn Nicole Murray Jan 2017

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 …

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An Improved Contact Method For Multi-Material Eulerian Hydrocodes, Kenneth Cline Walls Jan 2017

An Improved Contact Method For Multi-Material Eulerian Hydrocodes, Kenneth Cline Walls

All ETDs from UAB

Realistic and accurate modeling of contact for problems involving large deformations and severe distortions presents a host of computational challenges. Due to their natural description of surfaces, Lagrangian finite element methods are traditionally used for problems involving sliding contact. However, problems such as those involving ballistic penetrations, blast-structure interactions, and vehicular crash dynamics, can result in elements developing large aspect ratios, twisting, or even inverting. For this reason, Eulerian, and by extension Arbitrary Lagrangian-Eulerian (ALE), methods have become popular. However, additional complexities arise when these methods permit multiple materials to occupy a single finite element. Multi-material Eulerian formulations in computational …

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Augmented Framework For Generating Domain-Specific Mobile Applications, Rama Krishna Raju Rudraraju Jan 2017

Augmented Framework For Generating Domain-Specific Mobile Applications, Rama Krishna Raju Rudraraju

All ETDs from UAB

In this research, we developed a new approach called Augmented Framework to mean the integration of existing frameworks with domain-specific knowledge. The resulting framework provides a productive development environment suitable for app-developers to generate customized mobile-applications in the domain chosen by the framework developer. This process requires the application developer to provide specifications about the domain for customizing the generated mobile-applications. With this approach, the entire process of developing a mobile-application becomes simplified since it will only need minimum design and development effort. The approach for developing an Augmented Framework consists of three stages. The first stage consists of the …

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Object Detection And Path Detection System For Autonomous Terrain Vehicles, Avinash Kumar Singh Jan 2017

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 …

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An Iterative Pricing Control Scheme For Renewable Integration In Residential Applications Using Inherent Thermal Energy Storage, Justin Michael Hill Jan 2017

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 …

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Constant Pv Output By Using Dual Converters For Dc Application, Abdullah Masoud Alghamdi Jan 2017

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 …

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Alpha Rhythm And The Default Mode Network: An Eeg/Fmri Study, Anthony Dean Bowman Jan 2017

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 …

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Compression Molded E-Glass And Epoxy Resin Composites For Light Automotive Leaf Spring Application, Reyes Andres Baeza Rubio Jan 2017

Compression Molded E-Glass And Epoxy Resin Composites For Light Automotive Leaf Spring Application, Reyes Andres Baeza Rubio

All ETDs from UAB

Unidirectional and woven carbon or glass fibers are the most common reinforcements used in these automotive composites. To take full advantage of these materials, it is of importance to evaluate the different processes to manufacture them. The purpose of this research work is to characterize, optimize and manufacture fiber reinforced thermoset composites using the compression molding process for the application of producing improved automotive leaf springs. An epoxy resin matrix that is reinforced with E-glass fiber is the material of interest. These thermoset-based composites are evaluated to substitute the currently used steel parts in order to reduce the weight and …

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Acoustic Resonance Response Of Cast Iron, Siddhartha Biswas Jan 2017

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 …

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Low-Cost Inkjet-Printed Flexible Circuit For Gas Sensing, Sm Mehedee Parvez Jan 2017

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 …

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Design Of An Engineering Stem Training Toolkit, Vamsi Penmetsa Jan 2017

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 …

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Smart Home Automation Using Face Recognition For Personalization And Micro-Controller For Interfacing With Devices, Mohsine Taarji Jan 2017

Smart Home Automation Using Face Recognition For Personalization And Micro-Controller For Interfacing With Devices, Mohsine Taarji

All ETDs from UAB

Face recognition is the use of technology to recognize specific facial features using camera hardware and detection software. Face recognition has been used in many fields, both industrial and personal for such tasks as security and controlling home appliances. We define a smart home as a living space that can be equipped with wireless control systems and devices, for instance, uses radio frequency or infrared communication, to automate or simplify the operation of devices. In this Thesis, we investigate the development of a system that controls appliances around the house based on particular individuals using face recognition. The system will …

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Design, Testing, And Implementation Of Controls And Interface For An Adaptable Exercise Device For People With Physical Disabilities, John Hoyle Jan 2017

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 …

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Data Analysis And Modeling To Optimize Thermal Treatment Cost And Performance, Jack C. Parker, Ungtae Kim, Alyson Fortune, Steffen Griepke, James P. Galligan, Amber Bonarrigo Jan 2017

Data Analysis And Modeling To Optimize Thermal Treatment Cost And Performance, Jack C. Parker, Ungtae Kim, Alyson Fortune, Steffen Griepke, James P. Galligan, Amber Bonarrigo

Civil and Environmental Engineering Faculty Publications

The objective of in situ thermal treatment is typically to reduce the contaminant mass or average soil concentration below a specified value. Evaluation of whether the objective has been met is usually made by averaging soil concentrations from a limited number of soil samples.Results from several field sites indicate large performance uncertainty using this approach, even when the number of samples is large. We propose a method to estimate average soil concentration by fi tting a log normal probability model to thermal mass recovery data. A statistical approach is presented for making termination decisions from mass recovery data, soil sample …

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A Pore Water Pressure Diffusion Model To Predict Formwork Pressure Exerted By Freshly Mixed Concrete, Chan Kyu Park, Jae Hong Kim, Seong Ho Han Jan 2017

A Pore Water Pressure Diffusion Model To Predict Formwork Pressure Exerted By Freshly Mixed Concrete, Chan Kyu Park, Jae Hong Kim, Seong Ho Han

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The formwork pressure exerted by freshly mixed concrete is one of the most important considerations in ensuring the safety of construction in the field. The formwork pressure also affects the quality of concrete structures, determining the final shape of concrete members. Previous studies on the form pressure mostly investigated the intrinsic material effect. For example, the use of self-consolidating concrete increases the maximum pressure on the formwork. The extrinsic factor of a formwork system itself has rarely been considered. In the mockup tests and theoretical evaluations, it is identified that the bleed water-out controlled by the formwork tightness is critical. …

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Evaluating The Interactive Effects Of Traffic Volumes And Access Density On Crash Frequency, Ali Mohammed Alsubeai Jan 2017

Evaluating The Interactive Effects Of Traffic Volumes And Access Density On Crash Frequency, Ali Mohammed Alsubeai

Electronic Theses and Dissertations

Control of access points (e.g., driveway density) is an important consideration in roadway access management. Research has shown that by limiting the number of access points, there is a reduction in the number of conflict points along a roadway, resulting in improved safety. The effects of managing access points on crash frequency are documented as Crash Modification Factors/Functions (CMF) in the Highway Safety Manual (HSM) and the federal Highway Administration’s CMF Clearinghouse. The CMFs from the HSM indicate that the impacts of Access Density (AD) on crash frequency are a function of both AD and traffic volume (for rural roads). …

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Pretreatment, Enzymatic Hydrolysis, And Fermentation To Ethanol Using A Lignocellulosic Feedstock And Subsequent Recovery Of A Value Added Co-Product: Pure Crystalline Cellulose, Ryan J. Bouza Jan 2017

Pretreatment, Enzymatic Hydrolysis, And Fermentation To Ethanol Using A Lignocellulosic Feedstock And Subsequent Recovery Of A Value Added Co-Product: Pure Crystalline Cellulose, Ryan J. Bouza

Electronic Theses and Dissertations

As more demand for alternatives to petroleum and the industrial world’s love of cars increase, cellulosic ethanol will become more important. The ethanol can, of course, be used in the transportation fuel sector, but there is also a potential for co-products to be developed out of the cellulose to ethanol process. Some of these co-products have the potential to replace current petrol products. These co-products may provide the extra revenue generation needed for further investment and development of this industry. This would not only provide better energy independence, but in the United States, it would better satisfy the cellulosic ethanol …

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Efficient Energy Optimization For Smart Grid And Smart Community, Avijit Das Jan 2017

Efficient Energy Optimization For Smart Grid And Smart Community, Avijit Das

Electronic Theses and Dissertations

The electric power industry has undergone significant changes in response to the environmental concerns during the past decades. Nowadays, due to the integration of different distributed energy systems in the smart grid, the balancing between power generation and load demand becomes a critical problem. Specifically, due to the intermittent nature of renewable energy sources (RESs) , power system optimization becomes significantly complicated. Due to the uncertain nature of RESs, the system may fail to ensure the power quality which may cause increased operating costs for committing costly reserve units or penalty costs for curtailing load demands. This dissertation presents three …

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Effects Of Mechanical Bar Splices On Seismic Performance Of Reinforced Concrete Buildings, Abdullah Al Hashib Jan 2017

Effects Of Mechanical Bar Splices On Seismic Performance Of Reinforced Concrete Buildings, Abdullah Al Hashib

Electronic Theses and Dissertations

Mechanical bar splices, which are commonly referred to as couplers, are currently used in reinforced concrete structures to directly connect steel bars in lieu of conventional lap splicing. With proper detailing, couplers can be utilized to connect precast beams and columns to accelerate the construction. However, the experimental and analytical studies regarding their effect on the performance of RC moment-resisting frames (MRFs) are scarce. Current ACI 318 restricts the use of couplers in plastic hinge regions of special moment-resisting frames (SMRFs). Nevertheless, they can be incorporated at any location of the intermediate and ordinary MRFs. The seismic performance of RC …

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Modeling Of The Solid-Electrolyte Interface Layer Of Lithium Ion Batteries For Capacity Fade Using Kinetic Monte Carlo, Bigyan Khanal Jan 2017

Modeling Of The Solid-Electrolyte Interface Layer Of Lithium Ion Batteries For Capacity Fade Using Kinetic Monte Carlo, Bigyan Khanal

Electronic Theses and Dissertations

The accurate model on the growth of Solid-Electrolyte Interface (SEI) layer of Lithiumion batteries is used to study the capacity fade, ageing, and cycling life and provides significant information to ensure the battery safety. In this work, the model for SEI layer dynamics is developed using the Kinetic Monte Carlo approach, in which four major dynamical processes including adsorption, absorption, diffusion, and passivation are described by their individual rates, and determined from chemical and physical properties of materials used in the battery. Total cycle numbers to be simulated determine the number of Kinetic Monte Carlo steps. The formation of a …

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Glulam Timber Bridges For Local Roads, Zachary Charles Carnahan Jan 2017

Glulam Timber Bridges For Local Roads, Zachary Charles Carnahan

Electronic Theses and Dissertations

The most common type of bridges on South Dakota (SD) local roads are prestressed precast double-tee bridges. Currently, there is only one double-tee girder manufacturer in South Dakota (SD). In an attempt to provide more bridge type selection options for local governments, a study was performed at South Dakota State University to investigate the feasibility and performance of new types of single-span bridges suitable for local loads with low traffic. In one part of the study, Mingo (2016) developed a fully precast bridge incorporating full-depth deck-panels and prestressed inverted bulb-tee girders. The study presented in this thesis was performed to …

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Evaluation Of Woodchip Bioreactor Denitrification Kinetics, Abdoul Aziz Kouanda Jan 2017

Evaluation Of Woodchip Bioreactor Denitrification Kinetics, Abdoul Aziz Kouanda

Electronic Theses and Dissertations

Agricultural subsurface drainage is a water management practice used to remove excess water in poorly drained soil. The use of fertilizers combined with subsurface drainage practice affects negatively surface water quality due to nutrient loss. Woodchip bioreactors have previously been used as a technology for removing nitrate from agricultural subsurface drainage. Understanding the mechanism that governs nitrate removal in woodchip bioreactors is crucial for field bioreactor design and application. The objective of this project is to determine woodchip bioreactor denitrification kinetics parameters under different operating conditions including hydraulic retention time, temperature and influent nitrate concentrations. Laboratory column experiments were conducted …

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Mechanical Property Characterization Of Discontinuous Fiber Reinforced Composites By Computer Modeling, Amrit Bhusal Jan 2017

Mechanical Property Characterization Of Discontinuous Fiber Reinforced Composites By Computer Modeling, Amrit Bhusal

Electronic Theses and Dissertations

The desire to make high strength, lightweight, less corrosive, high fatigue resistance materials in auto industries, aero industries, biomedical industries have given a chance for in-depth study of composite materials. To get the profound knowledge of composites, different experiments are conducted which often take huge resources, cost and time. Computer modeling and analysis have gained popularity in Finite Element Analysis (FEA) because it can be used to predict the mechanical property of different materials. In this thesis, FEA technique has been used to predict mechanical property of discontinuous fiber reinforced composites (FRC). If we are able to foretell the mechanical …

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Evaluation Of Woodchip Bioreactors And Phosphorus Adsorption Media For Nutrient Removal From Subsurface Drainage Water, Utsav Thapa Jan 2017

Evaluation Of Woodchip Bioreactors And Phosphorus Adsorption Media For Nutrient Removal From Subsurface Drainage Water, Utsav Thapa

Electronic Theses and Dissertations

Increased subsurface drainage over the past few decades in eastern South Dakota contributed to agricultural water quality problems. Nutrient losses, primarily nitrate-N and dissolved P, from subsurface drainage, have been identified as major contributors to eutrophication in the Great Lakes and Gulf of Mexico. Denitrifying bioreactors and P adsorption structures are edge-of field practices that can be used to protect water quality in waters downstream of subsurface drainage systems. The objectives of this study were to evaluate the effectiveness of woodchip bioreactors and a P adsorption structure in removing nitrate-N and dissolved P from subsurface drainage water. Four woodchip bioreactors …

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Compact Facility For Testing Steady And Transient Thermal Performance Of Building Walls, Aimee Byrne, Gerard Byrne, Anthony Robinson Jan 2017

Compact Facility For Testing Steady And Transient Thermal Performance Of Building Walls, Aimee Byrne, Gerard Byrne, Anthony Robinson

Articles

Energy efficiency retrofit of buildings represents a key effort in reducing EU energy demand by 20% by 2020. However, predictions tend to overestimate savings by large percentages. The shortfall in savings can be attributed to incorrect predictive techniques, comfort takeback along with other behavioural and workmanship variables. Common predictive techniques related to heat loss tend to be based on the U-value of the building envelope. This paper presents the design of a more straightforward and compact version of the traditional Hot-Box apparatus (measures U-value) which instead determines the thermal resistance of samples of building envelope. U-value includes the need to …

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Can Phishing Education Enable Users To Recognize Phishing Attacks?, Hanaa Alghamdi Jan 2017

Can Phishing Education Enable Users To Recognize Phishing Attacks?, Hanaa Alghamdi

Dissertations

Phishing attacks have increased rapidly and caused many drastic damages and losses for internet users‟ .The purpose of this research is to investigate on effectiveness of phishing education and training to help users identify different forms of phishing threats. The study has been conducted through developing a phishing quiz mobile application which includes four kinds of phishing threats. It tested the ability of users to recognize spoofed emails, SMS phishing (SMshing), scam phone calls (Vishing), and phishing through social media networks. A comprehensive literature review was discussed to investigate on the research area, understand the research problem, support the proposed …

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Evaluating The Effectiveness Of The Gestalt Principles Of Perceptual Observation For Virtual Reality User Interface Design, William Macnamara Jan 2017

Evaluating The Effectiveness Of The Gestalt Principles Of Perceptual Observation For Virtual Reality User Interface Design, William Macnamara

Dissertations

There is a lot of interest and excitement surrounding the areas of Virtual Reality and Head-Mounted Displays with the recent releases of devices such as the Oculus Rift, Sony PSVR and the HTC Vive. While much of the focus for these devices has been related to sectors of the entertainment industries, namely the cinema and video game industries, there are many more practical applications for these technologies, with potential benefits in educational, training/simulation, therapeutic and modelling/design software. Developing a set of reliable guidelines for Virtual Reality User Interface Design could play a crucial role in whether the medium successfully integrates …

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