Engineering Commons^™

Ablamod: Advanced Ablation Characterization And Modelling European Project Description, Gregory Pinaud, A. Guelhan

Ablation Workshop

No abstract provided.

Overview Of Stmd’S Investments In Advanced Entry, Descent And Landing (Edl), Michael Wright

Ablation Workshop

No abstract provided.

Contractor Evaluations In The Contractor Selection Process, Timothy R. B. Taylor, Roy E. Sturgill, Maegan Mcdowell, Alexa Deep, Paul M. Goodrum

Kentucky Transportation Center Research Report

The current contractor evaluation system in use within the Kentucky Transportation Cabinet is based on the contractor evaluation system developed as part of SPR 212-00 “Quality Based Prequalification of Contractors.” This system relies on average performance ratings from the completion of the Contractor’s Performance Report at the conclusion of every project or annually for multi-year projects. The contractor’s average performance rating is weighted based on the dollar value of work performed across all projects for the year. The average performance rating is used in the computation of the Contractor’s Maximum Eligibility Amount in accordance with 603 KAR 2:015, Section 5. …

Co2 Recycling Using Microalgae For The Production Of Fuels, Michael H. Wilson, John Groppo, Andrew Placido, S. Graham, S. A. Morton Iii, Eduardo Santillan-Jimenez, Aubrey Shea, Mark Crocker, Czarena Crofcheck, Rodney Andrews

Center for Applied Energy Research Faculty and Staff Publications

CO₂ capture and recycle using microalgae was demonstrated at a coal-fired power plant (Duke Energy’s East Bend Station, Kentucky). Using an in-house designed closed loop, vertical tube photobioreactor, Scenedesmus acutus was cultured using flue gas as the CO₂ source. Algae productivity of 39 g/(m² day) in June–July was achieved at significant scale (18,000 L), while average daily productivity slightly in excess of 10 g/(m² day) was demonstrated in the month of December. A protocol for low-cost algae harvesting and dewatering was developed, and the conversion of algal lipids—extracted from the harvested biomass—to diesel-range hydrocarbons via catalytic …

Porous Nanocomposites With Integrated Internal Domains: Application To Separation Membranes, Wenle Li, John Y. Walz

Chemical and Materials Engineering Faculty Publications

Asymmetric membranes with layered structure have made significant achievements due to their balanced properties and multi-functionalities that come from a combination of multiple layers. However, issues such as delamination and substructure resistance are generated by the intrinsic layered structure. Here, we present a strategy to integrate the traditional layered structure into an asymmetric but continuous porous network. Through infiltrations of microparticles and nanoparticles to targeted regions, active domains are created inside the porous scaffold versus having them applied externally. The fabricated internal active domains are highly adjustable in terms of its dimensions, pore size, and materials. We demonstrate that it …

Influence Of Reduction Promoters On Stability Of Cobalt/Γ-Alumina Fischer-Tropsch Synthesis Catalysts, Gary Jacobs, Wenping Ma, Burtron H. Davis

Center for Applied Energy Research Faculty and Staff Publications

This focused review article underscores how metal reduction promoters can impact deactivation phenomena associated with cobalt Fischer-Tropsch synthesis catalysts. Promoters can exacerbate sintering if the additional cobalt metal clusters, formed as a result of the promoting effect, are in close proximity at the nanoscale to other cobalt particles on the surface. Recent efforts have shown that when promoters are used to facilitate the reduction of small crystallites with the aim of increasing surface Co⁰ site densities (e.g., in research catalysts), ultra-small crystallites (e.g., < 2–4.4 nm) formed are more susceptible to oxidation at high conversion relative to larger ones. The choice of promoter is important, as certain metals (e.g., Au) that promote cobalt oxide reduction can separate from cobalt during oxidation-reduction (regeneration) cycles. Finally, some elements have been identified to promote reduction but either poison the surface of Co⁰ (e.g., Cu), or produce excessive light gas selectivity (e.g., Cu and Pd, or Au at …

Poster Session, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

1. Grading a Watershed? Patrick Creager, Eastern Kentucky University, Richmond, KY
2. Permeability Heterogeneity and Its Effects on Hyporheic Zone Exchange, Timothy Pryshlak and Audrey Sawyer, Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY
3. Effects of Atrazine on the Chemical Alarm Cue Response in Longear Sunfish (Lepomis megalottis), Ben M. Adams and Ben F. Brammell, Natural Sciences Department, Asbury University, Wilmore, KY
4. New Features Available on the Kentucky Groundwater Data Repository, Bart Davidson and others, Kentucky Geological Survey, University of Kentucky, Lexington, KY
5. Removal of Persistent Organic Pollutants from Contaminated Water Sources Utilizing Polyphenol- Functionalized Magnetic …

Session 2c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Results of the Statewide Groundwater Pathogen Study, Susan L. Mallette, Kentucky Division of Water, Frankfort, KY
• Changes in Nutrients and E. coli During Two Storm Events in Hinkston Creek, KY, Tiffany Hunter and Brian Reeder, Institute for Regional Analysis and Public Policy, Morehead State University, Morehead, KY
• Engaging Partners in the Cane Run Watershed, Carol Hanley and others, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY
• The University of Kentucky Environmental Research and Training Lab is Available for Your Use, Tricia Coakley, Environmental Research Training Lab, University of Kentucky, Lexington, KY

Session 2b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Watershed-Scale Stable Isotope Simulation of the Fluvial Organic Carbon Budget Using the ISOFLOC Model, William Ford and Jimmy Fox, Department of Civil Engineering, University of Kentucky, Lexington, KY
• Time Average Velocity Characteristics of Decelerating Open Channel Flows, Robert Stewart and Jimmy Fox, Department of Civil Engineering, University of Kentucky, Lexington, KY
• Spatiotemporal Relevance of Soil Moisture's Interaction with Measured Soil-Terrain Parameters, Carla Landrum and others, Lexington, KY
• Transport of Agricultural Contaminants through a Karst Soil, Carl Bolster and others, Food Animal Environmental Research Unit, USDA-ARS, Bowling Green, KY

Session 2a: Panel Discussion: Developing Post-Incident Risk Communication Guidelines For Intentional Water Contamination Events, Chike Anyaegbunam, Charles B. Madinger, Pamela Cupp, Shari R. Veil, Timothy L. Sellnow, Anna Goodman Hoover

Kentucky Water Resources Annual Symposium

This panel will discuss emerging findings from a US EPA-funded research project intended to improve risk communication for post-incident decontamination and clearance activities associated with intentional contamination of a water system. The session will center around Phase II of the study, which focuses on extending the Phase I case study findings that were presented at last year’s KWRRI Symposium, to identify ways in which disparate stakeholder groups in metropolitan areas differentially perceive risk and subsequent risk communication efforts.

Session 1c, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Curry's Fork Watershed Plan: Data Pondering, Engaging Expert Advice, Cleaner Water Plans, Carolyn Cromer and others, Oldham County Fiscal Court, LaGrange, KY
• Overall Stream Function, Hydraulically and Ecologically (Opportunity Meets Necessity), Wanda Lawson and Oakes Routt, Stantec Consulting Services Inc., Louisville, KY
• Improving Urban Stream Water Quality through Stream Restoration at Montessori Middle School of Kentucky (MMSK), Pre-Restoration Water Quality and Bank Erosion Monitoring, Eric Dawalt and Arthur Parola, EcoGro/Ridgewater and the Stream Institute at the University of Louisville
• Improving Urban Stream Water Quality through Stream Restoration at Montessori Middle School of Kentucky (MMSK), Design and Construction …

Session 1b, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Improving Karst Sinkhole Mapping in Kentucky Using LiDAR, Junfeng Zhu and others, Kentucky Geological Survey, University of Kentucky, Lexington, KY
• "Dividing Ridges" in Light of LiDAR: A Closer Look at Some of Kentucky's Watershed Boundaries, Demetrio Zourarakis, Kentucky Division of Geographic Information, Frankfort, KY
• Horse Park Karst Water Instrumentation System (KWIS) Monitoring Station, Jim Currens and others, Kentucky Geological Survey, University of Kentucky, KY
• Formation Water Chemistry of Cambrian-Ordovician Knox Group Strata, KGS-Hansen Aggregates No. 1 Well, Carter County, Kentucky, T. M. Parris and others, Kentucky Geological Survey, University of Kentucky, Lexington, KY

Session 1a, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Water Quality Studies in the Kentucky Coalfields: The Trend Station Program, Richard J. Wahrer, Kentucky Department for Natural Resources, Frankfort, KY
• Water Quality Studies in the Kentucky Coalfields: A Closer Look at Pigeonroost Fork, Martin County, KY, Richard J. Wahrer, Kentucky Department for Natural Resources, Frankfort, KY
• Water Quality Monitoring of the McConnell Springs Stormwater Quality Wetland Pond and Gainesway Pond Retrofit Project, 2010-2013, David Price and Susan Pluegar, Lexington-Fayette County Government, Division of Water Quality, Lexington, KY
• Water Quality Monitoring of McConnell Springs, Lexington, KY, David Price, Lexington-Fayette County Government, Division of Water Quality, Lexington, …

Plenary Session, Kentucky Water Resources Research Institute, University Of Kentucky

Kentucky Water Resources Annual Symposium

• Using Microbial-Source Tracking to Investigate Sources of Fecal Contamination in the South Fork Little River Basin, Hopkinsville, Kentucky, Angie Crain and Mac Cherry, USGS Kentucky Water Science Center, Louisville, KY
• Application of Nitrogen and Oxygen Isotopes in Tracing Nitrate Sources in the South Fork Little River Basin, Hopkinsville, Kentucky, Angie Crain and Mac Cherry, USGS Kentucky Water Science Center, Louisville, KY
• Kentucky StreamStats Water-Resources Web Application: Enhancements and Implementation of Selected Low- and Mean-Flow Estimating Equations, Gary Martin, USGS Kentucky Water Science Center, Louisville, KY
• Kentucky Division of Water's Risk Communication Toolbox, Annemarie Cason and Kristen …

Proceedings Of 2014 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 G11AP20081 from the United States Geological Survey. 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 necessarily 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.

Phanerochaete Chrysosporium Pretreatment Of Biomass To Enhance Solvent Production In Subsequent Bacterial Solid-Substrate Cultivation, Wanying Yao, Sue E. Nokes

Biosystems and Agricultural Engineering Faculty Publications

This study investigated pretreatment of corn stover using solid substrate cultivation (SSC) of Phanerochaete chrysosporium (P. chrysosporium) to improve subsequent accessibility to cellulose. Thereafter, Clostridium thermocellum (C. thermocellum) was directly inoculated onto the pretreated biomass to accomplish hydrolysis, followed by solventogenesis by introducing Clostridium beijerinckii (C. beijerinckii).

An enzyme suite containing laccase, lignin peroxidase and manganese peroxidase activity was detected during the cultivation of P. chrysosporium on corn stover within 288 h at an initial moisture content 𝓌_H2O = 80% (mass of water/total mass). Incubation factors, such as substrate moisture content and cultivation …

Tunneling Into The Mott Insulator Sr2Iro4, John A. Nichols, Noah Bray-Ali, Armin Ansary, Gang Cao, Kwok-Wai Ng

Center for Advanced Materials Faculty Publications

We studied the single-layered iridate Sr₂IrO₄ with a scanning tunneling microscope. The finite low temperature conductance enables the electronic structure of this antiferromagnetic Mott insulator to be measured by tunneling spectroscopy. We imaged the topography of freshly cleaved surfaces and measured differential tunneling conductance at cryogenic temperatures. We found the Mott gap in the tunneling density of states to be 2Δ=615 meV. Within the Mott gap, additional shoulders are observed which are interpreted as inelastic loss features due to magnons.

Compounds And Methods For Reducing Oxidative Stress, Thomas Dziubla, J. Zach Hilt, Dipti Biswal, David B. Cochran, Paritosh Wattamwar

Chemical and Materials Engineering Faculty Patents

Antioxidant polymeric compounds are provided that comprise a plurality of monomeric portions, where each monomeric portion includes an antioxidant molecule interposed between at least two acrylate molecules, and where at least one acrylate molecule of each monomeric portion is linked by a diamine molecule to an acrylate molecule of an adjacent monomeric portion to thereby form the polymer. Methods of synthesizing polymeric compounds and methods of using the antioxidant polymeric compounds to reduce oxidative stress are also provided.

Test Case Series 3, Tom Van Eekelen, Alexandre Martin, Jean Lachaud, Daniele Bianchi

Ablation Workshop: Code Comparison

Numerical simulation of ablative-material response: code and model comparisons

Intercounty Commuter Public Transit Services And Opportunities In The Central Bluegrass, Ted H. Grossardt, Benjamin L. Blandford, Mei Chen

Kentucky Transportation Center Research Report

This report reviews the current state of available public transportation services in central Kentucky, with a focus on the Lexington-Fayette County commutershed. Within the region, this report identifies the major public transportation providers, describes the transit services available through them, and examines the potential opportunities of intercounty commuter public transportation services. Using intercounty commuting data obtained from the 2006-2008 Census Transportation Planning Products (CTPP), this report estimates the potential need and opportunity for additional transit services. Lastly, this report argues for the viability of vanpools as an efficient and cost-effective strategy for addressing the shortage of intercounty commuter transit services.

Lightweight Thermal Management Material For Enhancement Of Through-Thickness Thermal Conductivity, Matthew Collins Weisenberger

Center for Applied Energy Research Faculty Patents

A flexible sheet of aligned carbon nanotubes includes an array of aligned nanotubes held in a polymer matrix material. The carbon nanotubes have an average length of between about 50 microns and about 500 microns. The polymer matrix has an average thickness of between about 10 microns and about 500 microns. The flexible sheet has a density of about 0.2 to about 1.0 g/cc and includes between about 98 to about 60 weight percent aligned carbon nanotubes and between about 2 and about 40 weight percent polymer. A tape of aligned carbon nanotubes, a method for producing a tape of …

High Resolution Cine Displacement Encoding With Stimulated Echoes (Dense) At 3t With Navigator Feedback For Quantification Of Cardiac Mechanics, Gregory J. Wehner, Jonathan D. Suever, Christopher M. Haggerty, Linyuan Jing, David Powell, Xiaodong Zhong, Frederick H. Epstein, Brandon K. Fornwalt

Biomedical Engineering Presentations

Background: Measures of cardiac mechanics such as myocardial wall strain are better predictors of outcomes in patients with heart disease compared to traditional clinical measures and ejection fraction. Cine displacement encoding with stimulated echoes (DENSE) is an ideal method for quantifying cardiac motion which encodes tissue displacement in the phase of the MR signal and provides pixel-level resolution for quantifying cardiac mechanics. To date, DENSE has been implemented with resolution limited to 2-3 pixels across the myocardium. While this resolution is higher than most other techniques for quantifying cardiac mechanics, it may limit the ability of DENSE to quantify finer …

Experimental And Numerical Study Of Carbon Fiber Oxidation, Francesco Panerai, Nagi N. Mansour, Jean Lachaud, Alexandre Martin

Mechanical Engineering Faculty Publications

The oxidation at high Knudsen number of FiberForm® , the matrix material of NASA's Phenolic Impregnated Carbon Ablator, is investigated both experimentally and numerically. The experimental setup consists of a quartz tube through a clamshell heater. Mass loss and recession of carbon preform samples are measured at temperatures between 700 and 1300 K and pressures around 2000 Pa. A volume average fiber-scale oxidation model is used to model the setup and extract the effective reactivity of the material. New values for carbon fiber reactivity are suggested and discussed.

From Cardiac Optical Imaging Data To Body Surface Ecg: A Three Dimensional Ventricle Model, Yihua Zhao

Theses and Dissertations--Biomedical Engineering

Understanding the mechanisms behind unexplained abnormal heart rhythms is important for diagnosis and prevention of arrhythmias. Many studies have investigated the mechanisms at organ, tissue, cellular and molecular levels. There is considerable information available from tissue level experiments that investigate local action potential properties and from optical imaging to observe activity propagation properties at an organ level. By combining those electrophysiological properties together, in the present study we developed a simulation model that can help in estimation of the resulting body surface potentials from a specific electrical activity pattern within the myocardium. Some of the potential uses of our model …

Synthesis And Characterization Of High-Iron Alite-Calcium Sulfoaluminate-Ferrite Cements Produced From Industrial By-Products, Tristana Y. Duvallet, Youngmin Zhou, Thomas L. Robl, Rodney Andrews

Coal Combustion and Gasification Products Journal Archive

Ordinary Portland cement (OPC) and calcium sulfoaluminate cement (CSAC) are well-known and commonly used construction materials. The clinker phases mainly responsible for their strength development are C3S (alite) in OPC, which hydrates to form a calcium silicate gel phase; and C4A3S ´ (calcium sulfoaluminate) in CSAC, which hydrates to rapidly form ettringite. The purpose of this work was to produce high-iron alite-calcium sulfoaluminate-ferrite cements, by combining C4AF (ferrite), from 5% to 50% by weight, to the C3S and C4A3S ´ clinker phases. Producing this alite-calcium sulfoaluminate-ferrite cement would decrease the requirement of bauxite in the raw materials, which would consequently …

Microsphere Spray System For Wound Coverage, Nicholas J. Andersen

Theses and Dissertations--Biomedical Engineering

Spinal fusion is used to treat diseases or disorders of the spine by fusing together two or more vertebrae. Two associated risks with spinal fusion are infection and blood loss. Administration of tranexamic acid is used to prevent blood loss, and transfusions are given following blood loss. Surgical site infections are prevented with vancomycin powder spread into the surgical wound, while established infections are treated by debridement and delivery of antibiotics for 4 to 6 weeks. The present research explored an alternate method to prevent and treat blood loss or infection in spinal fusion. Poly(lactic-co-glycolic acid) (PLGA) microspheres was used …

Measuring Undergraduate Students’ Engineering Self-Efficacy: A Scale Validation Study, Natasha Johanna A. Mamaril

Theses and Dissertations--Educational, School, and Counseling Psychology

The purpose of this study was to develop and evaluate engineering self-efficacy measures for undergraduate students (N = 321) and to examine whether students' engineering self-efficacy differed by gender, year level, and major. The relationships between engineering self-efficacy and academic achievement and intent to persist in engineering were also investigated. Data from engineering students from two southeastern universities were collected in spring 2013. Exploratory factor analyses resulted in a unidimensional general engineering self-efficacy scale and a three-factor (i.e., research skills, tinkering skills, and engineering design) engineering skills self-efficacy scale. Multivariate analyses of variance revealed that self-efficacy did not differ by …

Computational Multimedia For Video Self Modeling, Ju Shen

Theses and Dissertations--Computer Science

Video self modeling (VSM) is a behavioral intervention technique in which a learner models a target behavior by watching a video of oneself. This is the idea behind the psychological theory of self-efficacy - you can learn or model to perform certain tasks because you see yourself doing it, which provides the most ideal form of behavior modeling. The effectiveness of VSM has been demonstrated for many different types of disabilities and behavioral problems ranging from stuttering, inappropriate social behaviors, autism, selective mutism to sports training. However, there is an inherent difficulty associated with the production of VSM material. Prolonged …

Double-Electrode Arc Welding Process: Principle, Variants, Control And Developments, Yi Lu, Shujun Chen, Yu Shi, Xiangrong Li, Jinsong Chen, Lee Kvidahl, Yu Ming Zhang

Electrical and Computer Engineering Faculty Publications

Double-electrode gas metal arc welding (DE-GMAW) is a novel welding process in which a second electrode, non-consumable or consumable, is added to bypass part of the wire current. The bypass current reduces the heat input in non-consumable DE-GMAW or increases the deposition rate in consumable DE-GMAW. The fixed correlation of the heat input with the deposition in conventional GMAW and its variants is thus changed and becomes controllable. At the University of Kentucky, DE-GMAW has been tested/developed by adding a plasma arc welding torch, a GTAW (gas tungsten arc welding) torch, a pair of GTAW torches, and a GMAW torch. …

Efficient Anonymous Biometric Matching In Privacy-Aware Environments, Ying Luo

Theses and Dissertations--Electrical and Computer Engineering

Video surveillance is an important tool used in security and environmental monitoring, however, the widespread deployment of surveillance cameras has raised serious privacy concerns. Many privacy-enhancing schemes have been recently proposed to automatically redact images of selected individuals in the surveillance video for protection. To identify these individuals for protection, the most reliable approach is to use biometric signals as they are immutable and highly discriminative. If misused, these characteristics of biometrics can seriously defeat the goal of privacy protection. In this dissertation, an Anonymous Biometric Access Control (ABAC) procedure is proposed based on biometric signals for privacy-aware video surveillance. …