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Articles 961 - 990 of 4566

Full-Text Articles in Engineering

Comparison Of A Modified And Traditional Rapid Infiltration Basin For Treatment And Control Of Nutrients In Wastewater Effluent, Jessica Cormier Aug 2018

Comparison Of A Modified And Traditional Rapid Infiltration Basin For Treatment And Control Of Nutrients In Wastewater Effluent, Jessica Cormier

Electronic Theses and Dissertations

Rapid infiltration basins (RIB) have been historically used in Florida for groundwater recharge, effluent disposal, or a combination of both. However, this technique has proven ineffective in providing nitrogen control unless the RIB is modified in some manner. In this study, a traditional RIB was compared to a modified RIB constructed with manufactured biosorption activated media (BAM) to evaluate nitrate removal from reclaimed water. The RIBs are used for reclaimed and excess storm water disposal. Few, if any, studies have been published where BAM-modified RIBs have been used for this purpose. In this work, a mixture of clay, tire crumb, …

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Autonomous Discovery And Maintenance Of Mobile Frees-Space-Optical Links, Mahmudur Khan Aug 2018

Autonomous Discovery And Maintenance Of Mobile Frees-Space-Optical Links, Mahmudur Khan

Electronic Theses and Dissertations

Free-Space-Optical (FSO) communication has the potential to play a significant role in future generation wireless networks. It is advantageous in terms of improved spectrum utilization, higher data transfer rate, and lower probability of interception from unwanted sources. FSO communication can provide optical-level wireless communication speeds and can also help solve the wireless capacity problem experienced by the traditional RF-based technologies. Despite these advantages, communications using FSO transceivers require establishment and maintenance of line-of-sight (LOS). We consider autonomous mobile nodes (Unmanned Ground Vehicles or Unmanned Aerial Vehicles), each with one FSO transceiver mounted on a movable head capable of scanning in …

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A Framework For Assessing Sustainability Impacts Of Truck Routing Strategies, Haluk Laman Aug 2018

A Framework For Assessing Sustainability Impacts Of Truck Routing Strategies, Haluk Laman

Electronic Theses and Dissertations

The impact of freight on our transportation system is further accentuated by the fact that trucks consume greater roadway capacity and therefore cause more significant problems including traffic congestion, delay, crashes, air pollution, fuel consumption, and pavement damage. Assessing the actual effects of truck traffic is a growing need to support the ability to safely and efficiently move goods and people in areas where roadway expansion is not the best option. On one hand, trucks need to efficiently serve commerce and industry, while at the same time their activities need not contribute to a decline in the quality or public …

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Nanofiltration Of Perfluorinated Compounds As A Function Of Water Matrix Properties, Hadi Toure Aug 2018

Nanofiltration Of Perfluorinated Compounds As A Function Of Water Matrix Properties, Hadi Toure

Electronic Theses and Dissertations

Perfluorinated compounds (PFCs) have been manufactured and used in various industries including food packaging, paintings, and coating industries. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) are the most commonly investigated PFCs that have bioaccumulative properties and a strong persistence in environment. Despite the growing interest in using membrane technology to remove PFOA and PFOS from water, little information is available on the impact of natural water matrices on the removal of PFOA and PFOS when using nanofiltration (NF). The presence of natural organic matter (NOM) and cations (Ca2+ and Mg2+) in water matrices and their interactions with the PFCs …

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Intermodel Comparison Between Switch 2.0 And Ge Maps: Evaluating A New Tool For Integrated Modeling Of Electric Vehicles And High-Renewable Power Systems, Florida Solar Energy Center, Matthias Fripp Jul 2018

Intermodel Comparison Between Switch 2.0 And Ge Maps: Evaluating A New Tool For Integrated Modeling Of Electric Vehicles And High-Renewable Power Systems, Florida Solar Energy Center, Matthias Fripp

FSEC Energy Research Center®

This report presents an inter-model comparison between the Switch and GE Energy Consulting, (GE) Multi Area Production Simulation (MAPS) power system models. This work was conducted as part of the project on the "Effect of Electric Vehicles on Power System Expansion and Operation" under a sub award to the Hawaii Natural Energy Institute, University of Hawaii at Manoa (UH), from the Electric Vehicle Transportation Center (EVTC) at the Florida Solar Energy Center, University of Central Florida. The EVTC is a University Transportation Center funded by the Research and Innovative Technology Administration of the US Department of Transportation. The EVTC is …

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Comparison Of The 6th Edition Florida Building Energy Conservation Code With Iecc 2018 & Ashrae 90.1-2016, Florida Solar Energy Center, Jeffrey Sonne Jun 2018

Comparison Of The 6th Edition Florida Building Energy Conservation Code With Iecc 2018 & Ashrae 90.1-2016, Florida Solar Energy Center, Jeffrey Sonne

FSEC Energy Research Center®

This study provides a comparison between the 6th Edition (2017) Florida Building Code, Energy Conservation and 2018 International Energy Conservation Code (IECC), based on approved 2015 to 2018 IECC changes included in the International Code document. And provides a stringency evaluation and cost-benefit analysis for those changes that impact energy use, to provide guidance for the upcoming 2017 to 2020 Florida Energy Code change cycle.

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Investigation Of Energy Impacts Of Whole-House Ducted Dehumidifier Location, Florida Solar Energy Center, Charles Withers, Jr. Jun 2018

Investigation Of Energy Impacts Of Whole-House Ducted Dehumidifier Location, Florida Solar Energy Center, Charles Withers, Jr.

FSEC Energy Research Center®

This report discusses energy impacts related to how ducted dehumidifier ducts are configured as well as where they are located. Lab controlled testing evaluated three different duct configurations. The three DHU lab test configurations were: 1) DHU air ducted directly from/to room, 2) DHU ducted from/to the central air return duct, and 3) DHU from/to the central air supply duct. Simulation effort evaluated conductive energy gains/losses through dehumidifier and its ducts for 1) conditioned space, 2) attic, and garage locations.

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Residential Air Leakage Testing And Mechanical Ventilation Verification, Florida Solar Energy Center, Jeffrey Sonne May 2018

Residential Air Leakage Testing And Mechanical Ventilation Verification, Florida Solar Energy Center, Jeffrey Sonne

FSEC Energy Research Center®

This project is intended to answer the following four questions regarding residential building air leakage testing and whole-house mechanical ventilation requirements as stated in the 2016 Supplement 1 changes to the 5th Edition (2014) Florida Energy Conservation Code, and now continued in the 6th Edition (2017) Code: - Is the new requirement to test residential air leakage being followed? - Who is providing the air leakage testing? - Are accurate air leakage rate test values being reported? - Is whole-house mechanical ventilation being installed in applicable cases?

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Analysis Of Differences Between 2018 Iecc R406 Code Compliance And Ansi/Resnet/Icc Standard 301, Florida Solar Energy Center, Philip W. Fairey May 2018

Analysis Of Differences Between 2018 Iecc R406 Code Compliance And Ansi/Resnet/Icc Standard 301, Florida Solar Energy Center, Philip W. Fairey

FSEC Energy Research Center®

EnergyGauge USA is used to study outdoor air ventilation rates in energy-efficient, one-story 2000 ft2, 3 bedroom, single-family homes in sixteen representative U.S. cities. Each of the 16 home archetypes is configured to be minimally compliant with the score requirements of Table R406.4 of the 2018 IECC as determined in accordance with ANSI/RESNET/ICC 301-2014. Each home is also configured to comply using two different compliance methods: the first with only high-efficiency options and the second utilizing on-site photovoltaic power generation. Each home configuration is evaluated using the ANSI/RESNET/ICC 301 Reference Home ventilation specification and again using the 2018 …

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Bio-Sorption Activated Media For Nitrogen Removal In A Rapid Infiltration Basin – Monitoring Project, Ni-Bin Chang, Martin Wanielista, Arvind Singh, Steven J. Duranceau, Dingbao Wang May 2018

Bio-Sorption Activated Media For Nitrogen Removal In A Rapid Infiltration Basin – Monitoring Project, Ni-Bin Chang, Martin Wanielista, Arvind Singh, Steven J. Duranceau, Dingbao Wang

BMP Trains Research and Publications

The Bent Oak City of DeLand pond (see Appendix A for the Environmental Resource Permit #76187-5) was increased in size and permitted in March of 2016 so that it could function to discharge both excess reclaimed water and excess stormwater to the ground. It was called in the permit a reclaimed water storage and recovery modification. Because of the discharge of treated sewage, it can be referred to as a rapid infiltration basin (RIB). However, it is used for the disposal of both reclaimed water and excess stormwater. The RIB was again modified in the fall of 2016 for additional …

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An Agent Based Model To Assess Crew Temporal Variability During U.S. Navy Shipboard Operations, Kevin Muhs May 2018

An Agent Based Model To Assess Crew Temporal Variability During U.S. Navy Shipboard Operations, Kevin Muhs

Electronic Theses and Dissertations

Understanding the factors that affect human performance variability as well as their temporal impacts is an essential element in fully integrating and designing complex, adaptive environments. This understanding is particularly necessary for high stakes, time-critical routines such as those performed during nuclear reactor, air traffic control, and military operations. Over the last three decades significant efforts have emerged to demonstrate and apply a host of techniques to include Discrete Event Simulation, Bayesian Belief Networks, Neural Networks, and a multitude of existing software applications to provide relevant assessments of human task performance and temporal variability. The objective of this research was …

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Semi-Annual Program Progress Performance Report For University Transportation Systems Pppr#9, Florida Solar Energy Center, Richard Raustad Apr 2018

Semi-Annual Program Progress Performance Report For University Transportation Systems Pppr#9, Florida Solar Energy Center, Richard Raustad

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.

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Battery Technologies For Mass Deployment Of Electric Vehicles, Florida Solar Energy Center, R. Paul Brooker Apr 2018

Battery Technologies For Mass Deployment Of Electric Vehicles, Florida Solar Energy Center, R. Paul Brooker

FSEC Energy Research Center®

Electric vehicle (EV) batteries have significantly improved since their inception. However, lifetime of these batteries is still strongly dependent on the usage profiles. This report describes aspects of EV battery utilization, and their impact on battery lifetime. Additionally, this report will describe potential future uses of EV batteries, particularly in vehicle-to-grid applications.

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Data On Cost-Optimal Nearly Zero Energy Buildings (Nzebs) Across Europe, Florida Solar Energy Center, Delia D'Agostino Apr 2018

Data On Cost-Optimal Nearly Zero Energy Buildings (Nzebs) Across Europe, Florida Solar Energy Center, Delia D'Agostino

FSEC Energy Research Center®

This data article refers to the research paper A model for the cost-optimal design of Nearly Zero Energy Buildings (NZEBs) in representative climates across Europe [1]. The reported data deal with the design optimization of a residential building prototype located in representative European locations. The study focus on the research of cost-optimal choices and efficiency measures in new buildings depending on the climate. The data linked within this article relate to the modeled building energy consumption, renewable production, potential energy savings, and costs. Data allow to visualize energy consumption before and after the optimization, selected efficiency measures, costs and renewable …

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The Subject Librarian Newsletter, Engineering And Computer Science, Spring 2018, Buenaventura "Ven" Basco Mar 2018

The Subject Librarian Newsletter, Engineering And Computer Science, Spring 2018, Buenaventura "Ven" Basco

Libraries' Newsletters

No abstract provided.

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Electric Vehicle And Wireless Charging Laboratory, Florida Solar Energy Center, Richard Raustad Mar 2018

Electric Vehicle And Wireless Charging Laboratory, Florida Solar Energy Center, Richard Raustad

FSEC Energy Research Center®

Wireless charging tests of electric vehicles (EV) have been conducted at the EVTC Wireless Laboratory located at the Florida Solar Energy Center, Cocoa, FL. These tests were performed to document testing protocols, evaluate standards and evaluate operational related wireless charging characteristics. The presented results give the charging efficiency of a Plugless wireless charger of 3.3 kW rated input power operating at 20 kHz resonant frequency. The results show a maximum charging efficiency of 94% at about 19 cm (7.5 in) of vertical separation. The electric and magnetic fields emanating from the transmitter were measured with and without the unit installed …

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Electric Vehicle Grid Experiments And Analysis, Florida Solar Energy Center, Richard Raustad Feb 2018

Electric Vehicle Grid Experiments And Analysis, Florida Solar Energy Center, Richard Raustad

FSEC Energy Research Center®

This project developed a low cost building energy management system (EMS) and conducted vehicle-to-grid (V2G) experiments on a commercial office building. The V2G effort included the installation and operation of a Princeton Power System CA-30 bi-directional power system. These experiments targeted the reduction of utility peak electrical demand for a commercial office building. In each case, total building peak demand was managed through a computer algorithm to limit the charging rate of electric vehicles or used the vehicle's on-board traction battery as a storage device to minimize peak electrical loads.

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Electric Vehicle Interaction At The Electrical Circuit Level, Florida Solar Energy Center, Shawyun Sariri Jan 2018

Electric Vehicle Interaction At The Electrical Circuit Level, Florida Solar Energy Center, Shawyun Sariri

FSEC Energy Research Center®

A large growth in energy demand has increased renewable energy penetration into existing power grid infrastructures, as well as spurring increased research into demand response programs. But before implementing an efficient demand response program, it is first necessary to understand the power usage behaviors of a consumer. This paper presents a real-time data acquisition system for the collection and storage of power data that will allow the study of demand response in an urban area, which can be applied to the efficient use of electric vehicle supply equipment (EVSE). Demand response programs are an ideal alternative to costly energy storage …

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Design Improvements And Construction Of An Electric Fish Finder, Jeffrey C. Lambert Jan 2018

Design Improvements And Construction Of An Electric Fish Finder, Jeffrey C. Lambert

The Pegasus Review: UCF Undergraduate Research Journal

We provide notes on the design and construction of an 'Electric Fish Finder – a self contained, portable bioamplifier for the detection and monitoring of the electric organ discharges generated by electric fish. Here we describe several improvements on a previous design, including: improved performance in waters of extremely low conductivity, extended battery life, and better waterproofing.

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Field And Laboratory Testing Of Approaches To Smart Whole-House Mechanical Ventilation Control, Florida Solar Energy Center, Eric Martin Jan 2018

Field And Laboratory Testing Of Approaches To Smart Whole-House Mechanical Ventilation Control, Florida Solar Energy Center, Eric Martin

FSEC Energy Research Center®

Whole-house mechanical ventilation is a critical component to a comprehensive strategy for good indoor air quality (IAQ). However, due to lack of integration with standard heating and cooling systems, and perceptions from a portion of the homebuilding industry about risks related to increased energy use, increased cost, and decreased comfort, voluntary and code-required adoption varies amongst regions. Smart ventilation controls (SVC) balance energy consumption, comfort, and IAQ by optimizing mechanical ventilation operation to reduce the heating and/or cooling loads, improve management of indoor moisture, and maintain IAQ equivalence according to ASHRAE 62.2.Suggested Citation:Martin, E.; Fernaughty, K.; Parker, D.; Lubliner, M.; …

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Interplay Of Molecular And Nanoscale Behaviors In Biological Soft Matter, Nicholas Ciaffone Jan 2018

Interplay Of Molecular And Nanoscale Behaviors In Biological Soft Matter, Nicholas Ciaffone

Electronic Theses and Dissertations

The complexity of biological soft matter at the sub-micrometer level is fundamentally correlated to the functionalities at the larger scale. Reflecting the level of heterogeneities in the properties of systems remains challenging when probing small scales, due to the mismatch between the area surveyed with the tools offering nanoscale resolution, such as atomic force microscopy (AFM), and the scale of natural variations inherent to biology. Hence, to understand the physiological and mechanical alterations that occur within a single cell relative to a cell population, a multiscale approach is necessary. In this work we show that it is possible to observe …

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Tunable Effect Of Metal Ions On Polyelectrolyte Mechanics, Angie Diaz Jan 2018

Tunable Effect Of Metal Ions On Polyelectrolyte Mechanics, Angie Diaz

Electronic Theses and Dissertations

Polyelectrolyte based hydrogel fibers can mimic extracellular matrix and have applications such as drug delivery and tissue scaffolding. Metal ions play a critical role in hydrogel fiber stability via electrostatic interactions, but knowledge of how they modulate mechanical properties of individual polyelectrolyte polymers is lacking. In this study, electrospun polyacrylic acid with chitosan is used as a model system to evaluate ferric ion effect on nanofiber mechanics. Using dark field microscopy imaging and persistence length analysis, we demonstrate that ferric ions modulate the bending stiffness of nanofibers. Young's modulus of individual nanofibers is estimated at values of a few kilopascals, …

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Size, Charge And Dose Dependent In-Vitro Kinetics Of Polystyrene Nanoparticles, Yasmine Abdellatif Jan 2018

Size, Charge And Dose Dependent In-Vitro Kinetics Of Polystyrene Nanoparticles, Yasmine Abdellatif

Electronic Theses and Dissertations

The aim of the study described herein is to quantify the in-vitro kinetics of internalization of polystyrene nanoparticles (PS NPs) by cells. We used different charges, sizes and doses of fluorescently labelled PS NPs. Nanoparticles were characterized with UV-Vis, Fluorescence emission Dynamic Light Scattering (DLS) and Zeta potential for knowing their absorption, fluorescence spectra, size, charge, respectively. Additionally, cell viability was tested to know the toxicity of PS NPs. The quantitative uptake, the kinetics profile and rate of uptake were studied by using a new in-vitro fluorescence assay. This was achieved quantitatively and qualitatively by fluorescent plate reader and confocal …

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Creating A Consistent Oceanic Multi-Decadal Intercalibrated Tmi-Gmi Constellation Data Record, Ruiyao Chen Jan 2018

Creating A Consistent Oceanic Multi-Decadal Intercalibrated Tmi-Gmi Constellation Data Record, Ruiyao Chen

Electronic Theses and Dissertations

The Tropical Rainfall Measuring Mission (TRMM), launched in late November 1997 into a low earth orbit, produced the longest microwave radiometric data time series of 17-plus years from the TRMM Microwave Imager (TMI). The Global Precipitation Measuring (GPM) mission is the follow-on to TRMM, designed to provide data continuity and advance precipitation measurement capabilities. The GPM Microwave Imager (GMI) performs as a brightness temperature (Tb) calibration standard for the intersatellite radiometric calibration (XCAL) for the other constellation members; and before GPM was launched, TMI was the XCAL standard. This dissertation aims at creating a consistent oceanic multi-decadal Tb data record …

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Structured Light-Field Focusing 3d Density Measurements Of A Supersonic Cone, Ryonosuke Ozawa Jan 2018

Structured Light-Field Focusing 3d Density Measurements Of A Supersonic Cone, Ryonosuke Ozawa

Electronic Theses and Dissertations

This study describes three-dimensional (3D) quantitative visualization of density field in a supersonic flow around a cone spike. A measurement of the density gradient is conducted within a supersonic wind tunnel facility at the Propulsion and Energy Research Laboratory at the University of Central Florida utilizing Structured Light-Field Focusing Schlieren (SLLF). In conventional schlieren and Shadowgraph techniques, it is widely known that a complicated optical system is needed and yet visualizable area depends on an effective diameter of lenses and mirrors. Unlike these techniques, SLLF is yet one of the same family as schlieren photography, it is capable of non-intrusive …

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Generation And Characterization Of Isolated Attosecond Pulse In The Soft X-Ray Regime, Jie Li Jan 2018

Generation And Characterization Of Isolated Attosecond Pulse In The Soft X-Ray Regime, Jie Li

Electronic Theses and Dissertations

The observation of any atomic and molecular dynamics requires a probe that has a timescale comparable to the dynamics itself. Ever since the invention of laser, the temporal duration of the laser pulse has been incrementally reduced from several nanoseconds to just attoseconds. Picosecond and femtosecond laser pulses have been widely used to study molecular rotation and vibration. In 2001, the first single isolated attosecond pulse (1 attosecond = 10^-18 seconds.) was demonstrated. Since this breakthrough, "attoscience" has become a hot topic in ultrafast physics. Attosecond pulses typically have span between EUV to X-ray photon energies and sub-femtosecond pulse duration. …

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Graphene Induced Formation Of Nanostructures In Composites, Chen Shen Jan 2018

Graphene Induced Formation Of Nanostructures In Composites, Chen Shen

Electronic Theses and Dissertations

Graphene induced nanostructures in graphene-based composites and the performance of these composites have been explored in this study. For the metallic nanoparticles decorated graphene aerogels composites, the fabrication of hierarchically structured, reduced graphene oxide (rGO) aerogels with heavily metallic nanoparticles was realized. Higher loading of palladium nanoparticles in graphene aerogels leads to improved hydrogen gas sensing performance. For polymer derived ceramics (PDCs) composites with anisotropic electrical properties, the fabrication of composites was realized by embedding anisotropic reduced graphene oxide aerogels (rGOAs) into the PDCs matrix. Raman spectroscopy and X-ray diffraction studies of PDCs composites with and without graphene indicate that …

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Effect Of Nonclassical Optical Turbulence On A Propagating Laser Beam, Melissa Beason Jan 2018

Effect Of Nonclassical Optical Turbulence On A Propagating Laser Beam, Melissa Beason

Electronic Theses and Dissertations

Theory developed for the propagation of a laser beam through optical turbulence generally assumes that the turbulence is both homogeneous and isotropic and that the associated spectrum follows the classical Kolmogorov spectral power law of κ-11/3. If the atmosphere deviates from these assumptions, beam statistics such as mean intensity, correlation, and scintillation index could vary significantly from mathematical predictions. This work considers the effect of nonclassical turbulence on a propagated beam. Namely, anisotropy of the turbulence and a power law that deviates from κ-11/3. A mathematical model is developed for the scintillation index of a Gaussian beam propagated through nonclassical …

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Assessment Of Microstructure And Mechanical Behavior Of Materials And Phases Observed In Low-Enriched Uranium Monolithic Fuel Plates After Fabrication, Ryan Newell Jan 2018

Assessment Of Microstructure And Mechanical Behavior Of Materials And Phases Observed In Low-Enriched Uranium Monolithic Fuel Plates After Fabrication, Ryan Newell

Electronic Theses and Dissertations

Low enriched uranium (LEU) fuels are being developed to reduce the use of highly enriched uranium in power generation to reduce proliferation risks. Challenges arise in providing sufficient fissile U in LEU without reactor redesign. As such, a novel monolithic fuel plate design employs LEU alloyed with 10 wt. % Mo. Throughout fabrication of these fuel plates, metallurgical transformations and reactions take place as a result of elevated temperatures during processing. The transformations include decomposition of the metastable body-centered cubic γ phase in the fuel and metallurgical interactions at interfaces between fuel plate components. This work aims to provide further …

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Probing The Effects Of Substrate Stiffness On Astrocytes Mechanics, Ariege Bizanti Jan 2018

Probing The Effects Of Substrate Stiffness On Astrocytes Mechanics, Ariege Bizanti

Electronic Theses and Dissertations

Astrocytes are among the most functionally diverse population of cells in the central nervous system (CNS) as they are essential to many important neurological functions including maintaining brain homeostasis, regulating the blood brain barrier, and preventing build-up of toxic substances within the brain, for example. Astrocyte importance to brain physiology and pathology has inspired a host of studies focused on understanding astrocyte behavior primarily from a biological and chemical perspective. However, a clear understanding of astrocyte dysfunction and their link to disease has been hampered by a lack of knowledge of astrocyte behavior from a biomechanical perspective. Furthermore, astrocytes (and …

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