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Articles 1 - 30 of 1088
Full-Text Articles in Engineering
Western Science And Eastern Zen To Seek The Origin Of Truth: Philosophical Background Of Scale Modeling, Kozo Saito
Western Science And Eastern Zen To Seek The Origin Of Truth: Philosophical Background Of Scale Modeling, Kozo Saito
Progress in Scale Modeling, an International Journal
This article was written to introduce philosophical background of scale modeling, where Zen philosophy was applied to overcome the limitation of logical thinking and hypotheses-driven deductive science. Three specific reasons are as follows. The first is related to the law approach in scale modeling; it uses the kufu principle, originated in Zen Buddhism, together with the other three scientific methods: experimental, theoretical, and computational. The second reason is because scale modeling seeks relativistic understanding by attempting to realize similarity; the concept is closer to Eastern philosophy rather than absolute understanding cultivated by deductive science. The third is in the educational …
Molecular Understanding And Design Of Deep Eutectic Solvents And Proteins Using Computer Simulations And Machine Learning, Usman Lame Abbas
Molecular Understanding And Design Of Deep Eutectic Solvents And Proteins Using Computer Simulations And Machine Learning, Usman Lame Abbas
Theses and Dissertations--Chemical and Materials Engineering
Hydrophobic deep eutectic solvents (DESs) have emerged as excellent extractants. A major challenge is the lack of an efficient tool to discover DES candidates. Currently, the search relies heavily on the researchers’ intuition or a trial-and-error process, which leads to a low success rate or bypassing of promising candidates. DES performance depends on the heterogeneous hydrogen bond environment formed by multiple hydrogen bond donors and acceptors. Understanding this heterogeneous hydrogen bond environment can help develop principles for designing high performance DESs for extraction and other separation applications. This work investigates the structure and dynamics of hydrogen bonds in hydrophobic DESs …
Nonuniform Sampling-Based Breast Cancer Classification, Santiago Posso
Nonuniform Sampling-Based Breast Cancer Classification, Santiago Posso
Theses and Dissertations--Electrical and Computer Engineering
The emergence of deep learning models and their success in visual object recognition have fueled the medical imaging community's interest in integrating these algorithms to improve medical diagnosis. However, natural images, which have been the main focus of deep learning models and mammograms, exhibit fundamental differences. First, breast tissue abnormalities are often smaller than salient objects in natural images. Second, breast images have significantly higher resolutions but are generally heavily downsampled to fit these images to deep learning models. Models that handle high-resolution mammograms require many exams and complex architectures. Additionally, spatially resizing mammograms leads to losing discriminative details essential …
Tricritical Point As A Crossover Between Type-Is And Type-Iis Bifurcations, Prabakaran Rajamanickam, Joel Daou
Tricritical Point As A Crossover Between Type-Is And Type-Iis Bifurcations, Prabakaran Rajamanickam, Joel Daou
Progress in Scale Modeling, an International Journal
A tricritical point as a crossover between (stationary finite-wavelength) type-Is and (stationary longwave) type-IIs bifurcations is identified in the study of diffusive-thermal (Turing) instability of flames propagating in a Hele-Shaw channel in a direction transverse to a shear flow. Three regimes exhibiting different scaling laws are identified in the neighbourhood of the tricritical point. For these three regimes, sixth-order partial differential equations are obtained governing the weakly nonlinear evolution of unstable solutions near the onset of instability. These sixth-order PDES may be regarded as the substitute for the classical fourth-order Kuramoto–Sivashinsky equation which is not applicable near the …
Methane Dynamics Of Kentucky Bottomland Hardwood Forested Systems, Marissa Miles, Jessica B. Moon, Skylar Ross, Jarred Asselta, Niklas Klauss, Rosie Carey, Kabi Raj Khatiwada, Bassil El Masri, Gary Stinchcomb, Benjamin R. K. Runkle
Methane Dynamics Of Kentucky Bottomland Hardwood Forested Systems, Marissa Miles, Jessica B. Moon, Skylar Ross, Jarred Asselta, Niklas Klauss, Rosie Carey, Kabi Raj Khatiwada, Bassil El Masri, Gary Stinchcomb, Benjamin R. K. Runkle
Kentucky Water Resources Annual Symposium
No abstract provided.
Floating Vegetation As A Driver Of Ch4 Emissions In Small Ponds Across Louisville, Ky, Mark Tierney, C. Jalink, J. H. Loughrin, S. W. Antle, Andrew S. Mehring
Floating Vegetation As A Driver Of Ch4 Emissions In Small Ponds Across Louisville, Ky, Mark Tierney, C. Jalink, J. H. Loughrin, S. W. Antle, Andrew S. Mehring
Kentucky Water Resources Annual Symposium
No abstract provided.
Measuring The Contribution Of Bald Cypress “Knees” To Greenhouse Gas Emissions During Climate Extremes, Skylar Ross, Jessica B. Moon, Niklas Klauss, Marissa Miles, Kabi Raj Khatiwada4, Bassil El Masri, Gary Stinchcomb, Benjamin R. K. Runkle
Measuring The Contribution Of Bald Cypress “Knees” To Greenhouse Gas Emissions During Climate Extremes, Skylar Ross, Jessica B. Moon, Niklas Klauss, Marissa Miles, Kabi Raj Khatiwada4, Bassil El Masri, Gary Stinchcomb, Benjamin R. K. Runkle
Kentucky Water Resources Annual Symposium
No abstract provided.
Characterizing Louisville Wetlands From Above And Below To Better Predict Wetland Carbon Sink-Source Status, Andrea E. Gaughan, Andrew S. Mehring, Mark Tierney, David Brown, Kassidy Haynes, Madison Cicha
Characterizing Louisville Wetlands From Above And Below To Better Predict Wetland Carbon Sink-Source Status, Andrea E. Gaughan, Andrew S. Mehring, Mark Tierney, David Brown, Kassidy Haynes, Madison Cicha
Kentucky Water Resources Annual Symposium
No abstract provided.
Scale Model Experiments Of Toxic Gas Production From The Combustion Of Polymers When Applied With Different Droplet Sizes Of Water Mist, Nicharee Thinnakornsutubutr, Masayuki Mizuno, Kazunori Kuwana
Scale Model Experiments Of Toxic Gas Production From The Combustion Of Polymers When Applied With Different Droplet Sizes Of Water Mist, Nicharee Thinnakornsutubutr, Masayuki Mizuno, Kazunori Kuwana
Progress in Scale Modeling, an International Journal
This research experimentally investigated the combustion of polymeric materials with water mist application in an enclosure, with an emphasis on the production of toxic gases. Two different diameters, ~100 and ~260 μm, were tested. The experimental conditions were determined based on Froude similarity laws for low drop Reynolds number conditions. Droplets and polymers’ physical and chemical properties influence the burning/extinguishing behavior and toxic-gas evolution. In general, larger droplets can extinguish a fire in a shorter time, and toxic gas concentrations in a test chamber decreased more rapidly. However, the large droplets tended to cause the flame expansion phenomenon for thermoplastics …
Soil Moisture And Geomorphologic Data For Use In Dynamic And Forecastable Landslide Hazard Analyses In Eastern Kentucky, Daniel M. Francis, L. Sebastian Bryson
Soil Moisture And Geomorphologic Data For Use In Dynamic And Forecastable Landslide Hazard Analyses In Eastern Kentucky, Daniel M. Francis, L. Sebastian Bryson
Civil Engineering Research Data
These data are the geomorphologic and land information system-based soil moisture estimates from assimilation of NASA SMAP satellite-based observations and NOAH 3.6 Land Surface Model estimates over known landslides in Eastern Kentucky. Additionally Long Short-Term Memory Recurrent Neural Network and logistic regression machine learning codes, as well as an Application programming interface code are included. Finally, in-situ data from Eastern Kentucky is included.
Unmanned Aircraft Systems For Precision Meteorology: An Analysis Of Gnss Position Measurement Error And Embedded Sensor Development, Karla S. Ladino
Unmanned Aircraft Systems For Precision Meteorology: An Analysis Of Gnss Position Measurement Error And Embedded Sensor Development, Karla S. Ladino
Theses and Dissertations--Biosystems and Agricultural Engineering
The overarching objective of this research was to enhance our comprehension of the three-dimensional precision of meteorological measurements obtained using small unmanned aircraft systems (UAS). Two complimentary experiments were conducted to achieve this objective.
The first experiment entailed the development and implementation of a system to determine the global navigation satellite system (GNSS) position accuracy on a UAS platform. This system was utilized to assess the static and dynamic accuracy of L1 and L1/L2 GNSS receivers in real-time kinematic (RTK) and non-RTK fix modes. Adjusted two-sample t-tests revealed significant differences in horizontal and vertical error between RTK and non-RTK receivers …
Historical And Forecasted Kentucky Specific Slope Stability Analyses Using Remotely Retrieved Hydrologic And Geomorphologic Data, Daniel M. Francis
Historical And Forecasted Kentucky Specific Slope Stability Analyses Using Remotely Retrieved Hydrologic And Geomorphologic Data, Daniel M. Francis
Theses and Dissertations--Civil Engineering
Hazard analyses of rainfall-induced landslides have typically been observed to experience a lack of inclusion of measurements of soil moisture within a given soil layer at a site of interest. Soil moisture is a hydromechanical variable capable of both strength gains and reductions within soil systems. However, in situ monitoring of soil moisture at every site of interest is an unfeasible goal. Therefore, spatiotemporal estimates of soil moisture that are representative of in-situ conditions are required for use in subsequent landslide hazard analyses.
This study brings together various techniques for the acquisition, modeling, and forecasting of spatiotemporal retrievals of soil …
A Secure And Distributed Architecture For Vehicular Cloud And Protocols For Privacy-Preserving Message Dissemination In Vehicular Ad Hoc Networks, Hassan Mistareehi
A Secure And Distributed Architecture For Vehicular Cloud And Protocols For Privacy-Preserving Message Dissemination In Vehicular Ad Hoc Networks, Hassan Mistareehi
Theses and Dissertations--Computer Science
Given the enormous interest in self-driving cars, Vehicular Ad hoc NETworks (VANETs) are likely to be widely deployed in the near future. Cloud computing is also gaining widespread deployment. Marriage between cloud computing and VANETs would help solve many of the needs of drivers, law enforcement agencies, traffic management, etc. The contributions of this dissertation are summarized as follows: A Secure and Distributed Architecture for Vehicular Cloud: Ensuring security and privacy is an important issue in the vehicular cloud; if information exchanged between entities is modified by a malicious vehicle, serious consequences such as traffic congestion and accidents can …
Peer-To-Peer Energy Trading In Smart Residential Environment With User Behavioral Modeling, Ashutosh Timilsina
Peer-To-Peer Energy Trading In Smart Residential Environment With User Behavioral Modeling, Ashutosh Timilsina
Theses and Dissertations--Computer Science
Electric power systems are transforming from a centralized unidirectional market to a decentralized open market. With this shift, the end-users have the possibility to actively participate in local energy exchanges, with or without the involvement of the main grid. Rapidly reducing prices for Renewable Energy Technologies (RETs), supported by their ease of installation and operation, with the facilitation of Electric Vehicles (EV) and Smart Grid (SG) technologies to make bidirectional flow of energy possible, has contributed to this changing landscape in the distribution side of the traditional power grid.
Trading energy among users in a decentralized fashion has been referred …
Spatiotemporal Retrievals Of Soil Moisture And Geomorphologic Data For Landslide Sites In Eastern Kentucky, Lindsey Sebastian Bryson, Daniel M. Francis
Spatiotemporal Retrievals Of Soil Moisture And Geomorphologic Data For Landslide Sites In Eastern Kentucky, Lindsey Sebastian Bryson, Daniel M. Francis
Civil Engineering Research Data
These data are the soil texture, land information system-based soil moisture estimates from assimilation of NASA SMAP satellite-based observations and NOAH 3.6 Land Surface Model estimates, artificial neural network machine learning code, and in-situ soil moisture measurements.
Molecular Understanding Of Zwitterions And Quantum Computing For Sustainability, Manh Tien Nguyen
Molecular Understanding Of Zwitterions And Quantum Computing For Sustainability, Manh Tien Nguyen
Theses and Dissertations--Chemical and Materials Engineering
The sustainable development of society needs sustainable energy solutions and the mitigation of greenhouse gas emissions. One key subject in this area is the development of safe and efficient ion-based batteries. Moreover, CO2 capture is a crucial pathway in mitigating emissions from the combustion of fossil fuels. Ongoing efforts are to improve both technologies' safety and efficiency. This thesis presents our efforts to conduct computational research on understanding advanced zwitterionic electrolytes and CO2 capture. Chapters 2-4 illustrate the computational research to understand ionic solvation in zwitterionic electrolytes. Solid-state electrolytes are essential for safer batteries. While solid polymer electrolytes …
Stratospheric Glider Measurements Of Atmospheric Parameters, Anisa Haghighi
Stratospheric Glider Measurements Of Atmospheric Parameters, Anisa Haghighi
Theses and Dissertations--Mechanical Engineering
In June 2021 a series of high altitude flights were conducted in Spaceport America, NM, using a balloon launched Uncrewed Aircraft System (UAS) to assess its capability to conduct measurements of various atmospheric properties and study turbulence in the troposphere and lower stratosphere. This UAS descends using an automated flight trajectory. The instruments aboard included a NASA-developed infrasonic microphone to evaluate its remote turbulence detection capabilities and a five-hole probe capable of measuring the in situ wind vector. Also on board were temperature, humidity and wind profile sensors. This document focuses on the atmospheric properties measured at high altitudes, the …
Impact Of Spallation And Internal Radiation On Fibrous Ablative Materials, Raghava Sai Chaitanya Davuluri
Impact Of Spallation And Internal Radiation On Fibrous Ablative Materials, Raghava Sai Chaitanya Davuluri
Theses and Dissertations--Mechanical Engineering
Space vehicles are equipped with Thermal Protection Systems (TPS) that encounter high heat rates and protect the payload while entering a planetary atmosphere. For most missions that interest NASA, ablative materials are used as TPS. These materials undergo several mass and energy transfer mechanisms to absorb intense heat. The size and construction of the TPS are based on the composition of the planetary atmosphere and the impact of various ablative mechanisms on the flow field and the material. Therefore, it is essential to quantify the rates of different ablative phenomena to model TPS accurately. In this work, the impact of …
Scale Modeling Of An Appearance Of Downwash Pattern Of Hot Smoke Ejected From Chimney In The Turbulent Cross Flow, Xangpheuak Inthavideth, Nobumasa Sekishita, Sounthisack Phommachanh, Yuji Nakamura
Scale Modeling Of An Appearance Of Downwash Pattern Of Hot Smoke Ejected From Chimney In The Turbulent Cross Flow, Xangpheuak Inthavideth, Nobumasa Sekishita, Sounthisack Phommachanh, Yuji Nakamura
Progress in Scale Modeling, an International Journal
This study aims to elucidate the scaling law to provide the critical condition on appearance of the downwash pattern of the hot smoke ejected from a chimney in a turbulent cross flow. A specially designed wind tunnel with an active turbulence generator developed by Makita was adopted to offer a quasi-isotropic turbulence field in a lab-scale test facility. A heated jet with smoke is issued into the cross flow from the vertically oriented chimney placed in the test section of the wind tunnel. In this study, the experimental parameters considered are temperature of the heated jet (smoke), jet ejected velocity, …
A Cfd-Based Scaling Analysis On Liquid And Paint Droplets Moving Through A Weak Concurrent Airflow Stream, Masoud Arabghahestani, Nelson Akafuah, Tianxiang Li, Kozo Saito
A Cfd-Based Scaling Analysis On Liquid And Paint Droplets Moving Through A Weak Concurrent Airflow Stream, Masoud Arabghahestani, Nelson Akafuah, Tianxiang Li, Kozo Saito
Progress in Scale Modeling, an International Journal
We conducted volume of fluids (VOF) multiphase model numerical simulations to obtain the interaction among all the major governing forces identified in our previous paper. Our numerical experiments are intended to assess the droplet generation process and the jetting behavior by providing specific input conditions, offering CFD as a tool to study scaling correlations instead of physical experiments. Water droplets that can represent waterborne paints were generated by piezo-generated sinusoidal waveforms at the inlet of the nozzle. The governing forces included the external piezo-based wave-generation force, the inertial force of droplets, the inertial force of air, the viscose force of …
Session 3a: Karst And Groundwater, Kentucky Water Research Institute
Session 3a: Karst And Groundwater, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Examining the Utility of Tryptophan-Like Fluorescence As a Proxy for Fecal Contamination in Karst Basins, Inner Bluegrass Region, Kentucky
- A Predictive Flood Model for Urban Karst Environments
- Improving Best Management Practices for the Siting, Maintenance, and Design of Urban Karst Groundwater Injection Wells
Session 3b: Sediments, Kentucky Water Research Institute
Session 3b: Sediments, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Sediment Degradation Experiments for a Low Gradient Stream Suggest the Watershed’s Connectivity Regime Exhibits Control on Stream Biogeochemistry
- Does Sediment Organic Matter Content Mediate the Effects of Chironomid Larvae on Benthic Nitrous Oxide Flux
- Drivers of Variability in Annual Sediment Accretion Rates Within Wetland Easements of Western Kentucky
Poster Session, Kentucky Water Research Institute
Poster Session, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Evaluating the Effects of Beaver Dam Removal on the Hydrology, Water Quality, and Bioindicators of a Restored Wetland
- Predictive Sediment Flux Modeling of a Karst Spring Using High Resolution Sensors and Stable Carbon and Nitrogen Isotopes
- Development and Validation of qPCR Assays for Use in eDNA Detection of Four Species of Semiaquatic Salamanders .
- Analyzing Recent Spatio-Temporal Rainfall Erosivity Patterns and Trends Across Kentucky
- Development of eDNA Protocols for Detection of Four Darter (Percidae: Etheostomatinae) Species in Central Kentucky Streams
- Assessing Change in the Seasonality of Stable Isotopes δ18O and δ2H for Meteoric and Terrestrial Waters of Central Kentucky
- Coupling …
Session 2: Water And The Community, Kentucky Water Research Institute
Session 2: Water And The Community, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Development of Human Health Criteria for Surface Waters of the Commonwealth of Kentucky
- Kentucky Workforce Survey Results
- Modeling, Managing, and Mitigating Stormwater Flooding using a Real-time Monitoring Network and Environmental Equity Approach
Session 1a: Watershed Management, Kentucky Water Research Institute
Session 1a: Watershed Management, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Motivations and Barriers to the Implementation of Riparian Buffer Zones on Central Kentucky Horse Farms
- Engaging Urban Watershed Stewards in Stormwater Management
- Efficacy Examination of Urban Reforestation Efforts on Streams in Lexington, KY: Macroinvertebrates and Water Quality Assessments
- Over a Decade of Monitoring Water Quality at McConnell Springs – What Have We Learned?
- Glenns Creek Watershed Characterization Efforts
Session 1b: Contaminant Exposure And Treatment, Kentucky Water Research Institute
Session 1b: Contaminant Exposure And Treatment, Kentucky Water Research Institute
Kentucky Water Resources Annual Symposium
- Cyanobacteria, Cyanotoxin Synthetase Genes, and Cyanotoxin Occurrence Among Selected Large River Sites in the Lower Ohio River Basin, 2020–21
- Emerging Contaminant Exposure Following WWTP Processes to Surface Waters
- Reactive Membrane Synthesis for Capture and Degradation of Toxic Water Contaminants
- Implications to Tap and Stream Water Chemistry Due to Variations in Sampling Location and Watershed Land Use
- Examining Toxicity of 2D Nanomaterial Phosphorene, Free-Standing and Embedded onto Membranes, and Its Application for Removal of Per-and Polyfluoroalkyl Substances (PFAS)
Proceedings Of 2022 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky
Proceedings Of 2022 Kentucky Water Resources Annual Symposium, Kentucky Water Resources Research Institute, University Of Kentucky
Kentucky Water Resources Annual Symposium
This symposium was planned and conducted as a part of the state water resources research institute annual program that is supported by Grant/Cooperative Agreement Number G21AP10631-00 from the United States Geological Survey (USGS). The contents of this proceedings document and the views and conclusions presented at the symposium are solely the responsibility of the individual authors and presenters and do not represent the official views of the USGS or of the symposium organizers and sponsors. This publication is produced with the understanding that the United States Government is authorized to reproduce and distribute reprints for government purposes. Mention of trade …
Removal Of Selenium And Heavy Metals From Coal Combustion Residuals Wastewater Using Surface Modified Iron Based Media, Madan Tandukar, Alex Korff, Andrew Vincent, Chris Hardin
Removal Of Selenium And Heavy Metals From Coal Combustion Residuals Wastewater Using Surface Modified Iron Based Media, Madan Tandukar, Alex Korff, Andrew Vincent, Chris Hardin
World of Coal Ash Proceedings
No abstract provided.
A Simplified Model For The Intermediate Structure Of Strong Fire Whirls, Forman A. Williams
A Simplified Model For The Intermediate Structure Of Strong Fire Whirls, Forman A. Williams
Progress in Scale Modeling, an International Journal
A model is described for the overall structure of intense fire whirls, based on a spatially evolving vortex, with circulation enhancement driven by the axial acceleration of low-density gas in the core through the axial pressure gradient. The axial acceleration increases the entrainment rate into the core which, through mass conservation, increases the circulation if the angle between the tangential and radial velocity components remains fixed. The two-zone model employs general balance equations for regions inside and outside a cylinder of fixed radius, each inviscid, the inside region being presumed to have a constant density small compared with the (constant) …
Reduced-Scale Experiments And Numerical Simulations Of Informal Settlement Dwelling Fires, Vigneshwaran Narayanan, Antonio Cicicone, Ayden D. Botha, Richard Shaun Walls
Reduced-Scale Experiments And Numerical Simulations Of Informal Settlement Dwelling Fires, Vigneshwaran Narayanan, Antonio Cicicone, Ayden D. Botha, Richard Shaun Walls
Progress in Scale Modeling, an International Journal
Informal settlement dwellings (ISDs) house approximately one billion people in the developing world and this number is expected to double by the year 2030. Contemporary research on ISD fires has focused on understanding the fire dynamics within individual dwellings (micro-scale) and fire spread in settlements consisting of multiple dwellings (macro-scale). This paper aims to do two primary things: investigate if scaling methods that were derived for compartments with thermally thick boundaries can be applied to ISDs (compartments with thermally thin boundaries), and if they can adequately represent the most important phenomena associated with full-scale ISD fires; and demonstrate Fire Dynamics …