Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Mechanical Engineering (5)
- Electrical and Computer Engineering (3)
- Energy Systems (3)
- Applied Mathematics (2)
- Civil Engineering (2)
-
- Civil and Environmental Engineering (2)
- Computer Engineering (2)
- Computer-Aided Engineering and Design (2)
- Construction Engineering and Management (2)
- Electrical and Electronics (2)
- Electro-Mechanical Systems (2)
- Heat Transfer, Combustion (2)
- Medicine and Health Sciences (2)
- Other Engineering (2)
- Physical Sciences and Mathematics (2)
- Power and Energy (2)
- Architectural Engineering (1)
- Architecture (1)
- Automotive Engineering (1)
- Bioimaging and Biomedical Optics (1)
- Biology and Biomimetic Materials (1)
- Biomedical Engineering and Bioengineering (1)
- Business (1)
- Business Analytics (1)
- Business Intelligence (1)
- Chemical Engineering (1)
- Computational Engineering (1)
- Computer and Systems Architecture (1)
- Construction Engineering (1)
- Keyword
-
- 3D printing (1)
- Alternative fuels (1)
- Android (1)
- Aqwa (1)
- Area Based (1)
-
- Autopsy (1)
- Azure (1)
- BIM (1)
- BIM-PSR (1)
- Bidirectional Buck-boost converter (1)
- Big Data (1)
- Building Information Modeling (1)
- Buoy geometry (1)
- CFD (1)
- CKPI (1)
- Case-Based Reasoning (1)
- Cellulose (1)
- Cloud (1)
- Cloud Computing (1)
- Coarse Grain Scalable Video (1)
- College of Graduate Studies (1)
- Combustion (1)
- Composite materials (1)
- Computed Tomography (1)
- Construction (1)
- DC micro-grid (1)
- Delivery optimization (1)
- Design (1)
- Diesel (1)
- Diesel combustion (1)
Articles 1 - 15 of 15
Full-Text Articles in Engineering
Employing H.264 Coarse And Medium Grain Scalable Video To Optimize Video Playback Over Passive Optical Networks, David Moore
Employing H.264 Coarse And Medium Grain Scalable Video To Optimize Video Playback Over Passive Optical Networks, David Moore
Honors College Theses
In this work, we propose the use of Coarse Grain Scalable (CGS) and Medium Grain Scalable (MGS) H.264/AVC video to optimize video playback on passive optical networks (PONs) by investigating network performance metrics such as data delay, video delay, and video delay jitter. Video playback is improved by sequentially dropping layers of scalable video. Dropping just a single CGS enhancement layer results in improvements of up to 57% for both data and video delay. However, video delay jitter benefits the most with an improvement ranging from 47% to 87%. Surprisingly, dropping subsequent CGS enhancement layers does not significantly improve the …
An Area Based Fan Beam Projection Model, Richard E. Steele, Jiehua Zhu
An Area Based Fan Beam Projection Model, Richard E. Steele, Jiehua Zhu
Honors College Theses
Area based projection models for computed tomography mitigate raw data errors by treating X-Rays as beams, whereas traditional line based projection models treat an X-Ray like a line, thus generating significant error. In an existing area based fan beam projection model, a rotation matrix, Q, simulates the rotation of the emitter detector pair to reduce computational load, but this introduces approximations by using an approximated rotation matrix. We eliminate approximations by deriving an exact formula for the entries of Q. Using a rotation of axes and by considering the neighboring cells' contributions to the area, the result has formulations for …
Nanoparticle Penetration Of Respirator Masks At Construction Sites, Jefferson W. Doehling
Nanoparticle Penetration Of Respirator Masks At Construction Sites, Jefferson W. Doehling
Honors College Theses
This experimental investigation studies the effectiveness of N95 respirators at blocking particles between 11.5 and 154 nm in diameter during 4 different construction activities. It is well known that large amounts of dust and debris are generated during construction activities. New research has found that significantly more nanoparticles are generated during construction activities than previously thought. Consequently, the N95 respirators commonly worn to protect against these particles are only rated to block 95% particles larger than 0.3 microns in size. In this investigation, two respirator models were tested, a NIOSH TC-84A-0007 pleated N95 respirator and a NIOSH 42CFR84 foldable N95 …
Designing And Testing 3-D Printed Wafer-Box With Embedded Pzt Sensors To Identify The Shape Effect On Energy Harvesting, Ahmad Jami Safayet
Designing And Testing 3-D Printed Wafer-Box With Embedded Pzt Sensors To Identify The Shape Effect On Energy Harvesting, Ahmad Jami Safayet
Electronic Theses and Dissertations
Piezoelectric energy has been recently paid attention in the field of alternative energy. Day by day the traditional energy sources including Coal tar and oils are becoming scarce. People are heading to an alternative energy source to meet the future energy demand. Piezoelectric energy is one of the competitive energy sources compared to the conventional renewable energy sources including solar, wind, and geothermal power and so on. This energy production method bears enormous research potential because it can be used as the roadway for a new method of power generation. This research project aimed to identify which shaped wafer-box produced …
Digital Forensic Tools & Cloud-Based Machine Learning For Analyzing Crime Data, Majeed Kayode Raji
Digital Forensic Tools & Cloud-Based Machine Learning For Analyzing Crime Data, Majeed Kayode Raji
Electronic Theses and Dissertations
Digital forensics is a branch of forensic science in which we can recreate past events using forensic tools for legal measure. Also, the increase in the availability of mobile devices has led to their use in criminal activities. Moreover, the rate at which data is being generated has been on the increase which has led to big data problems. With cloud computing, data can now be stored, processed and analyzed as they are generated. This thesis documents consists of three studies related to data analysis. The first study involves analyzing data from an android smartphone while making a comparison between …
Structural And Aerodynamic Design, Procedure And Analysis Of A Small V-Shaped Vertical Axis Wind Turbine, Odari J. Whyte
Structural And Aerodynamic Design, Procedure And Analysis Of A Small V-Shaped Vertical Axis Wind Turbine, Odari J. Whyte
Electronic Theses and Dissertations
Over the last two decades there has been a renewed interest in Vertical Axis Wind Turbines. This turbine configuration though unpopular for large-scale generation has found a niche market in the way of offshore energy harvesting. However, offshore wind has its challenges. In this thesis a detailed comprehensive study of a proposed V-shaped vertical axis turbine rotor is performed in order to examine its structural and aerodynamic characteristics. The design met and exceeded the safety parameters establish for test bed operation, showing a factor of safety of 1.87 with regard to fatigue stress response. A satisfactory fatigue stress design life …
Building Information Modeling (Bim) Impact On Construction Performance, David D. John
Building Information Modeling (Bim) Impact On Construction Performance, David D. John
Electronic Theses and Dissertations
This study is designed to address the need for having a measure for Construction Performance on BIM-assisted construction projects. Through this study a new Construction Key Performance Indicator (CKPI) matrix is identified and created by the author. The CKPI could be used to assess BIM-assisted projects. Utilizing a sequential mixed methodology approach, academic and practitioner perspectives are assessed. A qualitative content analysis and quantitative descriptive analysis based on demographics are conducted to establish a better understanding of BIM and Construction Performance. The academic perspective is used to assess the relevance of BIMM and CKPI indicators, and the practitioner perspective is …
Establishing A Need For A Protocol For The Interoperability Of Heterogeneous Iot Home Devices, Jenna Bayto
Establishing A Need For A Protocol For The Interoperability Of Heterogeneous Iot Home Devices, Jenna Bayto
Electronic Theses and Dissertations
The Internet of Things (IoT) refers to the field of connecting devices consumers use every day to the internet. As the world relies on more and more internet-driven technological devices to control functions within the home, issues with compatibility of those devices are surfacing. This research was created to establish the need for standardization of IoT devices within the home.
Reduced Exhaust Emissions Through Blending N-Butanol With Ultra Low Sulfur Diesel And Synthetic Paraffinic Kerosene In Reactivity Controlled Compression Ignition Combustion, Remi Gaubert
Electronic Theses and Dissertations
Increasing restrictions on the emitted exhaust emissions in diesel engines are becoming a more challenging task than in previous years. An electronic common rail fuel injection system and a port fuel injection (PFI) system were developed for an experimental engine to research dual fuel combustion. The experimental research was conducted at 1500 rpm and 4, 5, and 6 bar indicated mean effective pressure (IMEP). n-Butanol was port fuel injected at a 60% by mass fraction coupled with direct injection (DI) of three fuels, including ultra-low sulfur diesel (ULSD RCCI), a 50-50 wt-% blend of ULSD and butanol (ULSD-Bu RCCI), and …
Synthesis And Behavior Characterization Of Multi-Scale Hierarchical Structured Composites, Jacob M. Mayfield
Synthesis And Behavior Characterization Of Multi-Scale Hierarchical Structured Composites, Jacob M. Mayfield
Electronic Theses and Dissertations
The purpose of the synthesis of a multi-scale hierarchical composite material was to create a material with a high specific strength, a low mass, and high strength material. To achieve this the material categorization of the Formlabs Tough V2 resin was conducted. The resin was used in the construction of a bio-mimicry diamond lattice structure. The structure was subjected to compression testing to characterize the material properties. The Tough V2 resin structure combined with cellulose created a multi-scaled material on Macro and Micro levels to show the bio-inspired design to increase the material properties in a favorable manor. The Tough …
Optimal Supply Delivery Under Military Specific Constraints, Talena Fletcher
Optimal Supply Delivery Under Military Specific Constraints, Talena Fletcher
Electronic Theses and Dissertations
Through-out military history, the need to safely and effectively allocate resources to various military operations was a task of extreme importance. Satisfying the needs of multiple consumers by optimally pairing with appropriate suppliers falls into the category of vehicle routing problems (VRP), which has been intensively studied over the years. In general, finding the optimal solution to VRP is known to be NP-hard. The proposed solutions rely on mathematical programming and the size of the problems that can be optimally solved is typically limited. In military settings, balancing the needs of multiple consumers with the current operational environment has always …
Modeling, Designing And Analysis Of A Standalone Pv Dc Microgrid System, Sharaf Sumaiya
Modeling, Designing And Analysis Of A Standalone Pv Dc Microgrid System, Sharaf Sumaiya
Electronic Theses and Dissertations
The increasing concern about global warming, the upsurge of oil prices, and pollution of petroleum energy has led scientists to search for cost-effective energy sources, for example, photovoltaics. Recently DC microgrids have also drawn more consideration because of the expanding use of direct current (DC) energy sources, energy storages and loads in power systems. First, as a groundwork, the 1D organic solar cell has been investigated that leads to design 3D organic solar cell. Then design and analysis of a standalone solar PV system with dc microgrid has been proposed to supply power for both DC and AC loads. The …
Investigation Of The Performance And Emissions Characteristics Of Dual Fuel Combustion In A Single Cylinder Idi Diesel Engine, Johnnie L. Williams Jr
Investigation Of The Performance And Emissions Characteristics Of Dual Fuel Combustion In A Single Cylinder Idi Diesel Engine, Johnnie L. Williams Jr
Electronic Theses and Dissertations
Restrictions in the allowable exhaust gas emissions of diesel engines has become a driving factor in the design, development, and implementation of internal combustion (IC) engines. A dual fuel research engine concept was developed and implemented in an indirect injected engine in order to research combustion characteristics and emissions for non-road applications. The experimental engine was operated at a constant speed and load 2400 rpm and 5.5 bar indicated mean effective pressure (IMEP). n-Butanol was port fuel injected at 10%, 20%, 30%, and 40% by mass fraction with neat ultra-low sulfur diesel (ULSD#2). Peak pressure, maximum pressure rise rates, and …
Geometric Optimization Of A Heaving Point Absorber Wave Energy Converter, Ian Riley
Geometric Optimization Of A Heaving Point Absorber Wave Energy Converter, Ian Riley
Electronic Theses and Dissertations
Wave energy shows significant potential for development into a competitive renewable energy source. Non-renewable resources are finite and contribute to adverse effects on the environment. Development of wave energy conversion devices that use heave motion as the primary driver for converting wave energy into electrical potential is explored through optimizing the geometry of an axisymmetric partially submerged buoy in deep water. The governing equations of motion and hydrodynamic forces are solved for in one degree of freedom using ANSYS Aqwa. An external PTO device is simulated to induce power capture in the system. Four different geometric shapes are tested and …
Mazetec: A Scenario-Based Learning Platform, Daniel Bietz
Mazetec: A Scenario-Based Learning Platform, Daniel Bietz
Electronic Theses and Dissertations
This work presents Mazetec, a scenario-based learning platform for delivering non-linear scenarios format asynchronously. It enables subject matter experts to create interactive, state-dependent case studies or courses with branching logic for online learning and knowledge testing. Mazetec is a complex web application designed to deliver decision-based or case-based educational scenarios and simulations in a time-limited, non-linear format. There are many e-learning systems in the open source and commercial markets, but while these systems may have similar functions, we have found none that are both domain independent and able to deliver state-dependent content asynchronous and non-linearly. Mazetec can serve as …