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Articles 1141 - 1170 of 4566
Full-Text Articles in Engineering
Electric Vehicle Energy Impacts, Florida Solar Energy Center, Katherine Mckenzie
Electric Vehicle Energy Impacts, Florida Solar Energy Center, Katherine Mckenzie
FSEC Energy Research Center®
The objective of this research project was to evaluate the impacts of electric vehicles (EVs) and renewable wind and solar photovoltaic (PV) power generation on reducing petroleum imports and greenhouse gas emissions to Hawaii. In 2015, the state of Hawaii mandated fossil fuel electric power displacement by imposing Renewable Portfolio Standards (RPS) that will reach 100% renewable electricity generation by 2045. With small, remote and isolated island electricity grids, utilities in Hawaii face unprecedented technical and economic challenges to meet these goals with exceedingly high levels of intermittent wind and PV power generation. To meet these RPS goals, EVs become …
Semi-Annual Program Progress Performance Report For University Transportation Systems Pppr#7, Florida Solar Energy Center, David L. Block
Semi-Annual Program Progress Performance Report For University Transportation Systems Pppr#7, Florida Solar Energy Center, David L. Block
FSEC Energy Research Center®
The Electric Vehicle Transportation Center (EVTC) supports the U.S. Department of Transportation's strategic goal of planning for near-term integration of alternative fuel vehicles as a means to build a sustainable transportation system. The project objectives are to evaluate technologies, standards, planning and policies to ensure seamless integration of electric vehicles (EVs) into a complex transportation network and electricity grid. The EVTC bridges the gap between deployment of electric vehicles and the traditional transportation system. This document is a summary of the activities until April 28, 2017.
Residential Code Review For The 2017 Florida Building Energy Code, Florida Solar Energy Center, Jeffrey Sonne
Residential Code Review For The 2017 Florida Building Energy Code, Florida Solar Energy Center, Jeffrey Sonne
FSEC Energy Research Center®
The project reviews provisions of the proposed 2017 residential Florida building energy code in order to make a determination if it meets or exceeds the 2015 IECC code.
Electric Bus Systems. A Case Study And Optimization Study, Florida Solar Energy Center, Nan Qin
Electric Bus Systems. A Case Study And Optimization Study, Florida Solar Energy Center, Nan Qin
FSEC Energy Research Center®
Pure electric buses (EBs) offer an alternative fuel for the nation's transit bus systems. To evaluate EBs in a transit setting, this project investigated the five electric bus fleet of the StarMetro transit system of the city of Tallahassee, FL. For the study, the implementing strategy, route distances and timings, charging times, fuel economies, impact of chargers, and maintenance and operational characteristics were analyzed. The results were compared to a baseline five diesel bus fleet. The results showed that even with a four-fold improvement in fuel efficiency, the operational costs of electric buses were only 10% lower than that for …
Fuel Cell Vehicle Technologies Final Report, Florida Solar Energy Center, Nan Qin
Fuel Cell Vehicle Technologies Final Report, Florida Solar Energy Center, Nan Qin
FSEC Energy Research Center®
Fuel cell electric vehicles (FCEVs) use hydrogen as fuel and exhaust only water and heat. They provide driving ranges and fueling times comparable to gasoline vehicles. Despite the advantages, FCEVs have been in and out of the spot light of the auto industry for the past several decades. As FCEVs finally moved from concept demonstration to commercialization in 2015, it is critical to analyze the opportunities and challenges this technology brings. This project placed emphasis on four areas: (1) Analysis of the development of FCEVs from a historic and technology point of view; (2) analysis of hydrogen fueling station infrastructure …
Assessing The Sunguide® And Steward Databases, Florida Solar Energy Center, Richard Raustad
Assessing The Sunguide® And Steward Databases, Florida Solar Energy Center, Richard Raustad
FSEC Energy Research Center®
This report is a final research report for Assessing the SunGuide® and STEWARD Databases project of the Electric Vehicle Transportation Center (EVTC) at the University of Central Florida (UCF). The Electric Vehicle Transportation Center is a University Transportation Center funded by the Research and Innovative Technology Administration of the U.S. Department of Transportation. The EVTC is a research and education center whose projects prepare the U.S. transportation system for the influx of electric vehicles into a sustainable transportation network and investigate the opportunity these vehicles present to enhance electric grid modernization efforts. The EVTC is led by UCF's Florida Solar …
Pv-Driven Heat Pump Water Heater Final Report, Florida Solar Energy Center, Carlos Colon
Pv-Driven Heat Pump Water Heater Final Report, Florida Solar Energy Center, Carlos Colon
FSEC Energy Research Center®
As part of the effort towards zero energy buildings and high efficiency water heating systems, the Florida Solar Energy Center (FSEC) working under contract with the National Renewable Energy laboratories (NREL) has successfully completed a demonstration of a photovoltaic heat pump water heater (PV-HPWH) concept. The system integrates two 310Wp solar photovoltaics (PV) modules and grid tied micro-inverters with a commercially available 50-gallon HPWH. The project showcases innovative strategies for distributed PV thermal systems that limit grid interaction and provide increased thermal energy storage. The system utilizes a custom appliance control module (ACM) interface to vary thermostat settings (115 °F …
Electric Vehicle Charging Technologies Analysis And Standards, Florida Solar Energy Center, J. Doug Kettles
Electric Vehicle Charging Technologies Analysis And Standards, Florida Solar Energy Center, J. Doug Kettles
FSEC Energy Research Center®
This project has evaluated the technologies and standards associated with Electric Vehicle Service Equipment (EVSE) and the related infrastructure, and the major cost issue related to electric vehicle (EV) charging -- the cost of utility power. The technology assessment report evaluated safety standards for infrastructure, highway and vehicles and the barriers and challenges of deploying an expanded network of EV charging stations. The report also made recommendations to help standardize and expedite EVSE infrastructure and charging network deployment.
Cost Effectiveness Of Energy Efficiency And On-Site Photovoltaic Power For 2015 International Energy Conservation Code Eri (Energy Rating Index) Compliance, Florida Solar Energy Center, Philip W. Fairey
Cost Effectiveness Of Energy Efficiency And On-Site Photovoltaic Power For 2015 International Energy Conservation Code Eri (Energy Rating Index) Compliance, Florida Solar Energy Center, Philip W. Fairey
FSEC Energy Research Center®
EnergyGauge® USA v.5.1 is used to simulate the energy use of one-story, three bedroom, 2000 ft², single-family, frame homes in sixteen representative U.S. climates comprising all eight IECC climate zones. The energy use of the Section R406.2 minimum efficiency home (the Baseline Home) is compared against the energy use of homes complying with the prescriptive requirements of Section R402 of the 2015 IECC and against homes complying with the Section R406 Energy Rating Index (ERI) Compliance Alternative. The improvement cost and energy savings of the improved homes relative to the Baseline Home are then used to determine the cost effectiveness …
Implications Of Electric Vehicle Penetration On State And Federal Highway Revenues, Florida Solar Energy Center, Kevin Schleith
Implications Of Electric Vehicle Penetration On State And Federal Highway Revenues, Florida Solar Energy Center, Kevin Schleith
FSEC Energy Research Center®
This report summarizes the results of research conducted to determine if current and near future electric vehicle (EV) sales will have an impact on motor fuel tax revenues as part of the Federal Highway Trust Fund (HTF). Gasoline and diesel fuel taxes account for $31.1 billion or about 87% of the HTF. The project results were accomplished by conducting a review of existing industry and government reports that detail fuel tax revenues and an analysis of EV sales from 2010 through 2016. Results show, that as of January 2017, the lost fuel tax revenue from EV sales of 560,000 vehicles …
Electric Vehicle Life Cycle Cost Analysis, Florida Solar Energy Center, Richard Raustad
Electric Vehicle Life Cycle Cost Analysis, Florida Solar Energy Center, Richard Raustad
FSEC Energy Research Center®
This project compared total life cycle costs of battery electric vehicles (BEV), plug-in hybrid electric vehicles (PHEV), hybrid electric vehicles (HEV), and vehicles with internal combustion engines (ICE). The analysis considered capital and operating costs in order to present an equal comparison of differing vehicles. The analysis also included photovoltaic (PV) and workplace charging options. The overall goal was to define the total vehicle cost of ownership over 5, 10, 15, and 20 year life expectancies. The developed life cycle cost computer program will allow any individual to compare life cycle costs of any vehicle.
Comparative Performance Of Two Ventilation Strategies In A Hot-Humid Climate, Florida Solar Energy Center, Sarah Widder
Comparative Performance Of Two Ventilation Strategies In A Hot-Humid Climate, Florida Solar Energy Center, Sarah Widder
FSEC Energy Research Center®
ASHRAE Standard 62.2, 'Ventilation and Indoor Air Quality in Low-Rise Buildings,' is the most commonly referenced residential ventilation standard in the United States. It is currently required by ENERGY STAR Version 3 (V3), the 2012 International Energy Conservation Code, the U.S. Department of Energy's Zero Energy Ready Home Program, many state weatherization programs, and many other home performance programs. The standard calls for ventilation levels that are perceived by some builders and contractors to cause indoor moisture issues in hot-humid climates unless mitigated by supplemental dehumidification systems, which increase overall energy consumption. Therefore, many high-performance home builders in a hot-humid …
Economic Impacts Of Electric Vehicle Adoption, Florida Solar Energy Center, Makena Coffman
Economic Impacts Of Electric Vehicle Adoption, Florida Solar Energy Center, Makena Coffman
FSEC Energy Research Center®
The objective of the Economic Impacts of Electric Vehicle Adoption research project was to examine the predicted levels of electric vehicle (EV) adoption, to analyze the life cycle costs of EVs compared to internal combustion engine vehicles and to evaluate EV impacts on GHG emissions for Hawaii. The results were presented in three publications. The first report evaluated EV penetration rates and provided an assessment of expected EV penetration over time. The research also assessed factors that affect EVs adoption, including regulatory mechanisms. The results estimated there will be 140,000 EVs on the road in Hawaii by the year 2040 …
Fluorescence Lifetime Imaging And Spectroscopy Aided Tracking Of Zno And Cds:Mn/Zns/ N-Acetyl Cysteine (Nac) Quantum Dots In Citrus Plants, Torus Washington
Fluorescence Lifetime Imaging And Spectroscopy Aided Tracking Of Zno And Cds:Mn/Zns/ N-Acetyl Cysteine (Nac) Quantum Dots In Citrus Plants, Torus Washington
Electronic Theses and Dissertations
In this thesis, we present an efficacious way of tracking nanoparticle movement in plant tissue through the use of fluorescence lifetime imaging (FLIM) and spectroscopy as well as a review of nanoparticle uptake in plants and the proposed mechanisms governing them. Given the increasing number of nanomaterials in agriculture and society as a whole, proper imaging tools and proactive measures must be taken to track nanoparticle movement in plant tissues and create infrastructure and products to keep things sustainable and safe. Herein we report a ZnO comparable nanoparticle— a CdS:Mn/ZnS/ N-acetyl cysteine (NAC) quantum dot— which boasts longer lifetimes and …
High Power Continuous Wave Quantum Cascade Lasers With Increased Ridge Width, Ankesh Todi
High Power Continuous Wave Quantum Cascade Lasers With Increased Ridge Width, Ankesh Todi
Electronic Theses and Dissertations
Quantum Cascade Lasers have recently gained considerable attention for their capability to emit infrared radiation in a broad infrared spectral region, very compact dimensions, and high optical power/efficiency. Increasing continuous wave optical power is one of the main research directions in the field. A straightforward approach to increasing optical power in the pulsed regime is to increase number of stages in the cascade structure. However, due to a low active region thermal conductivity, the increase in number of stages leads to active region overheating in continuous wave operation. In this work, an alternative approach to power scaling with device dimensions …
Freestanding Holey Thin Films For Renewable Energy Storage, Kyle Marcus
Freestanding Holey Thin Films For Renewable Energy Storage, Kyle Marcus
Electronic Theses and Dissertations
The rapid advancement of portable and wearable technologies has challenged research to improve upon current renewable battery energy storage systems. By using nanotechnology, it is now possible to access more of the energy storage theoretical values that have been unattainable thus far. We have developed a method to create freestanding holey thin films through combinations of electrochemical and chemical vapor deposition (CVD) techniques to be used in renewable energy storage systems. Freestanding thin films promote excellent contact between the residual conductive framework and any functionalized active component specific to the designed material. Without requiring any other additives, the as-prepared freestanding …
Mechanism Of Actin Bundle Assembly, Mechanics And Structure By Ion Interaction, Nicholas Castaneda
Mechanism Of Actin Bundle Assembly, Mechanics And Structure By Ion Interaction, Nicholas Castaneda
Electronic Theses and Dissertations
The assembly of actin filaments into bundles plays an essential role in mechanical strength and dynamic reorganization of cytoskeleton. Divalent counterions at high concentrations promote bundle formation through electrostatic attraction between charged filaments. Although it has been hypothesized that specific cation interactions may contribute to salt-induced bundling, molecular mechanisms of how salt modulates bundle assembly and mechanics are not well established. Here we determine the mechanical and dynamic properties of actin bundles with physiologically relevant cations. Using total internal reflection fluorescence (TIRF) microscopy, we measure the bending stiffness of actin bundles determined by persistence length analysis. We characterize real-time formation …
Six Degree Of Freedom Dynamic Modeling Of A High Altitude Airship And Its Trajectory Optimization Using Direct Collocation Method, Pradens Pierre-Louis
Six Degree Of Freedom Dynamic Modeling Of A High Altitude Airship And Its Trajectory Optimization Using Direct Collocation Method, Pradens Pierre-Louis
Electronic Theses and Dissertations
The long duration airborne feature of airships makes them an attractive solution for many military and civil applications such as long-endurance surveillance, reconnaissance, environment monitoring, communication utilities, and energy harvesting. To achieve a minimum energy periodic motion in the air, an optimal trajectory problem is solved using basic direct collocation methods. In the direct approach, the optimal control problem is converted into a nonlinear programming (NLP). Pseudo-inverse and several discretization methods such as Trapezoidal and Hermite-Simpson are used to obtain a numerical approximated solution by discretizing the states and controls into a set of equal nodes. These nodes are approximated …
Electrode Integration Of Nanostructured Metal And Metal Oxide Materials Based On In-Situ Growth Methods For Environmental Sensors, Xiaochen Wang
Electrode Integration Of Nanostructured Metal And Metal Oxide Materials Based On In-Situ Growth Methods For Environmental Sensors, Xiaochen Wang
Electronic Theses and Dissertations
In the past decades, increased human population and activities have introduced a large amount of pollutants into the environment. Various types of conventional analytical instruments were used for monitoring the emitted chemicals with low detection limit, high accuracy, and discrimination power. However, many of these methods are laboratory-based owing to sample collection, transportation, extraction, and purification steps. To make real-time on-site monitoring possible, miniaturized sensors with various integrated elements were developed. One of the most well-known strategies is to utilize nanostructured materials with enhanced sensing properties for those devices. For a majority of the current state of art devices, the …
Groundwater Modeling For Assessing The Impacts Of Natural Hazards In East-Central Florida, Han Xiao
Groundwater Modeling For Assessing The Impacts Of Natural Hazards In East-Central Florida, Han Xiao
Electronic Theses and Dissertations
In coastal east-central Florida (ECF) , the low-lying coastal alluvial plains and barrier islands have a high risk of being inundated by seawater due to climate change effects such as sea-level rise, changing rainfall patterns, and intensified storm surge from hurricanes., This will produce saltwater intrusion into the coastal aquifer from infiltration of overtopping saltwater. In the inland ECF region, sinkhole occurrence is recognized as the primary geologic hazard causing massive financial losses to society in the past several decades. The objectives of this dissertation are to: (1) evaluate the impacts of sea-level rise and intensified storm surge on the …
Load-Balancing In Local And Metro-Area Networks With Mptcp And Openflow, Austin Jerome
Load-Balancing In Local And Metro-Area Networks With Mptcp And Openflow, Austin Jerome
Electronic Theses and Dissertations
In this thesis, a novel load-balancing technique for local or metro-area traffic is proposed in mesh-style topologies. The technique uses Software Defined Networking (SDN) architecture with virtual local area network (VLAN) setups typically seen in a campus or small-to-medium enterprise environment. This was done to provide a possible solution or at least a platform to expand on for the load-balancing dilemma that network administrators face today. The transport layer protocol Multi-Path TCP (MPTCP) coupled with IP aliasing is also used. The trait of MPTCP of forming multiple subflows from sender to receiver depending on the availability of IP addresses at …
Shifted Plastic Hinge Column Connections Using Grouted Sleeves For Accelerated Bridge Construction, Haider Al-Jelawy
Shifted Plastic Hinge Column Connections Using Grouted Sleeves For Accelerated Bridge Construction, Haider Al-Jelawy
Electronic Theses and Dissertations
Accelerated bridge construction (ABC) is being increasingly used in new bridge construction and repair. ABC typically requires prefabricated elements joined with mechanical couplers. Grouted sleeves (GSs) offer good construction tolerances and load transfer between precast elements. However, previous research identified some performance issues with precast columns employing GS connections for seismic regions. Therefore, there is a need to develop improved connection details. This research consists of three components; testing of six large-scale precast reinforced concrete column models, a series of individual component tests on GS bar splices, and analytical studies. Large-scale, precast column models were designed and experimentally tested using …
Reliable Spectrum Hole Detection In Spectrum-Heterogeneous Mobile Cognitive Radio Networks Via Sequential Bayesian Non-Parametric Clustering, Alireza Zaeemzadeh
Reliable Spectrum Hole Detection In Spectrum-Heterogeneous Mobile Cognitive Radio Networks Via Sequential Bayesian Non-Parametric Clustering, Alireza Zaeemzadeh
Electronic Theses and Dissertations
In this work, the problem of detecting radio spectrum opportunities in spectrum-heterogeneous cognitive radio networks is addressed. Spectrum opportunities are the frequency channels that are underutilized by the primary licensed users. Thus, by enabling the unlicensed users to detect and utilize them, we can improve the efficiency, reliability, and the flexibility of the radio spectrum usage. The main objective of this work is to discover the spectrum opportunities in time, space, and frequency domains, by proposing a low-cost and practical framework. Spectrum-heterogeneous networks are the networks in which different sensors experience different spectrum opportunities. Thus, the sensing data from sensors …
Analysis Of Pedestrian Crash Characteristics And Contributing Causes In Central Florida, Zainb Bianco
Analysis Of Pedestrian Crash Characteristics And Contributing Causes In Central Florida, Zainb Bianco
Electronic Theses and Dissertations
This research investigates the main reasons leading the State of Florida to be ranked among the worst states in terms of pedestrian safety with four metro areas considered the most dangerous for pedestrians among all the United States as reported in the Dangerous by Design report. The study analyzes the characteristics and contributing causes of pedestrian crashes that occurred in Central Florida over a 5 year-period (2011-2015) at intersections and along roadway segments at mid-block locations using the data obtained from the Signal 4 Analytics database. All pedestrian related crashes were compiled and all the 6,789 crash reports were studied …
Wearable Passive Wireless Mems Respiration Sensor, Sina Moradian
Wearable Passive Wireless Mems Respiration Sensor, Sina Moradian
Electronic Theses and Dissertations
In this study a passive sensor that wirelessly monitors the profile of the human respiratory system is presented. The sensor was designed to be wearable, weighs less than 10 grams and is durable. The sensor is made of a RF piezoelectric MEMS resonator and an ultra-high frequency antenna made of a thin metal film formed on a flexible substrate . The resonance frequency of the TPoS resonator shifts as a function of condensation and evaporation of water vapor on the surface of the resonator and changes in resonator's temperature. These parameters change in each in response to inspiration and expiration …
Characteristics Of Hydrogel-Wetted Thin Films, James Owens
Characteristics Of Hydrogel-Wetted Thin Films, James Owens
Electronic Theses and Dissertations
The meniscus region of a thin film is known to have high heat transfer properties due to high evaporation rates and activation of latent heat. The region known as the thin film meniscus (δfilm lt& 2 µm ) can account for more than half of the total heat transfer of a droplet or film. This study focuses on the potential elongation and curvature amplification of the thin film meniscus region by the implementation of a layer of high hydrogen bonding (hydrogel) film on which the liquid meniscus is built. Forced wetting via liquid propagation though this hydrogel layer in the …
Mid-Infrared Absorption Spectrometer For Multi-Species Detection Using Leds For Space Applications: Development And Flight Testing, Michael Villar
Mid-Infrared Absorption Spectrometer For Multi-Species Detection Using Leds For Space Applications: Development And Flight Testing, Michael Villar
Electronic Theses and Dissertations
As commercial space travel expands, the need for specialized instrumentation to ensure the safety of crew and cargo becomes increasingly necessary. Both the Federal Aviation Administration (FAA) and pioneers in the space tourism industry have expressed an interest in a robust, low cost, and low power consumption sensor to measure atmospheric composition aboard spacecraft. To achieve this goal a time-resolved NDIR absorption sensor that measures transient levels of gaseous carbon dioxide (CO2) and carbon monoxide (CO) was developed. The developed sensor has a wide range of applications applicable to the growing needs of industry, from monitoring CO and CO2 levels …
High Performance Techniques For Face Recognition, Ahmed Aldhahab
High Performance Techniques For Face Recognition, Ahmed Aldhahab
Electronic Theses and Dissertations
The identification of individuals using face recognition techniques is a challenging task. This is due to the variations resulting from facial expressions, makeup, rotations, illuminations, gestures, etc. Also, facial images contain a great deal of redundant information, which negatively affects the performance of the recognition system. The dimensionality and the redundancy of the facial features have a direct effect on the face recognition accuracy. Not all the features in the feature vector space are useful. For example, non-discriminating features in the feature vector space not only degrade the recognition accuracy but also increase the computational complexity. In the field of …
Precision Metrology Of Laser Plasmas In The Xuv Band, John Szilagyi
Precision Metrology Of Laser Plasmas In The Xuv Band, John Szilagyi
Electronic Theses and Dissertations
The XUV band, a region of light spanning the wavelength range of 5 - 200 nm, is located between the Ultraviolet and X-ray regions of the electromagnetic spectrum. It is further divided into a 100 - 200 nm region called the Vacuum Ultraviolet (VUV), and a 5 – 100 nm region called the Extreme Ultraviolet (EUV). Applications of this light have been slow to develop due to the lack of suitable sources, efficient optics, and sensitive detectors. Recently, many industries such as the semiconductor manufacturing industry, medical surgery, micromachining, microscopy, and spectroscopy have begun to benefit from the short wavelengths …
Field Evaluation Of Insync Adaptive Traffic Signal Control System In Multiple Environments Using Multiple Approaches, Md Shafikul Islam Shafik
Field Evaluation Of Insync Adaptive Traffic Signal Control System In Multiple Environments Using Multiple Approaches, Md Shafikul Islam Shafik
Electronic Theses and Dissertations
Since the beginning of signalization of intersections, the management of traffic congestion is one of most critical challenges specifically for the city and urbanized area. Almost all the municipal agencies struggle to manage the perplexities associated with traffic congestion or signal control. The Adaptive Traffic Control System (ATCS), an advanced and major technological component of the Intelligent Transportation Systems (ITS) is considered the most dynamic and real-time traffic management technology and has potential to effectively manage rapidly varying traffic flow relative to the current state-of-the-art traffic management practices. InSync ATCS is deployed in multiple states throughout the US and expanding …