Digital Commons Network^™

Active And Retroactive Digital Newspaper Preservation, Andrew Mcdonnell

Library Faculty and Staff Publications

The University of Kentucky Libraries’ (UKL) long-running efforts to document and provide access to the state’s history via newspaper preservation have necessarily evolved over the last 80 years. As news formats and preservation technologies have changed, particularly in relation to born-digital media, the libraries’ efforts have had to keep pace. The race to preserve these materials before they disappear or are locked away on media inaccessible to modern computers is not always chronologically linear, though. Digital archivists and librarians must sometimes straddle multiple generations of technology to successfully migrate, capture, and otherwise preserve digital publications, and there is no single …

Limbic-Predominant Age-Related Tdp-43 Encephalopathy (Late-Nc): Co-Pathologies And Genetic Risk Factors Provide Clues About Pathogenesis, Peter T. Nelson, David Fardo, Xian Wu, Khine Zin Aung, Matthew D. Cykowski, Yuriko Katsumata

Neurology Faculty Publications

Limbic-predominant age-related TDP-43 encephalopathy neuropathologic change (LATE-NC) is detectable at autopsy in more than one- third of people beyond age 85 years and is robustly associated with dementia independent of other pathologies. Although LATE-NC has a large impact on public health, there remain uncertainties about the underlying biologic mechanisms. Here, we review the literature from human studies that may shed light on pathogenetic mechanisms. It is increasingly clear that certain combinations of pathologic changes tend to coexist in aging brains. Although “pure” LATE-NC is not rare, LATE-NC often coexists in the same brains with Alzheimer disease neuropathologic change, brain arteriolosclerosis, …

Coordinated Controls Of Residential Ev Chargers Considering High Power Appliances, Steven B. Poore, Rosemary E. Alden, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

In addition to electric vehicle (EV) adoption, the electricity demand of the modern grid is also under change from the replacement of resistive electric water heaters (EWHs) with high-efficiency heat pump electric water heaters (HPWH). Typical load of a HPWH has two parts: a low power compressor and a backup high power resistive boosting element. Within this paper, residential load from a large field demonstration for over one thousand homes is simulated in virtual power plant (VPP) operation with realistic HPWH and EV synthetic modules based on big data from the latest CBECC-Res and National Household Travel Survey (NHTS). Simultaneous …

Comparative Analysis Of Motors With Inner And Outer Reluctance Rotors And Pm Stators, Oluwaseun A. Badewa, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

This paper presents a comparison of special outer and inner reluctance rotor motor topologies with permanent magnet (PM) stators having toroidal AC windings. A systematic approach is taken to study and discuss the design geometries, the respective impact on performance, and adoption of technological advancements such as stator-only cooling and hair-pin winding for high slot fill factor. Parametric FEA models are developed for both topologies, and design of experiments (DoE)-based sensitivity analysis is used to study the effect of independent variables on specific performance metrics such as torque, motor loss, torque ripple, and power factor. Inner and outer rotor topologies …

Sensorless Control Of Low Inductance Coreless Afpm Machines For Fault-Tolerant Operation Of Propulsion Systems, Yaser Chulaee, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

In motor-drive systems utilized in safety-critical applications and demanding conditions like electric aircraft propulsion systems, the reliability of the system is greatly affected by position sensors, given their susceptibility within the motor drive system. Consequently, there is a need to eliminate sensors in vector-controlled motor drives to decrease overall hardware complexity and expenses, bolster the mechanical durability and dependability of the drive system. In this paper, a fault-tolerant sensorless control system for low inductance coreless axial flux PM (AFPM) machines, integrated into electric aircraft propulsion systems, is introduced. The proposed control system spans a wide operating range, from zero to …

Fault-Tolerant Axial Flux Coreless Pm Machines With Independent Phase Modules, Yaser Chulaee, Ali Mohammadi, Dan M. Ionel, Matin Vatani

Electrical and Computer Engineering Graduate Research

In this paper, a fault-tolerant two-phase high power coreless axial flux PM (AFPM) machine with a modular structure is introduced. The performance of this machine, in terms of torque, power density, and efficiency, is compared with its three-phase counterpart configuration based on finite element analysis (FEA) and experimental results. The fault tolerance of these two configurations, considering the control systems, is also compared. A detailed power loss breakdown for the prototype two-phase and three-phase printed circuit board (PCB) stator coreless AFPM machines derived from experiments is presented, showcasing that the introduced fault-tolerant two-phase machine has comparable performance and efficiency, while …

High-Power Polyphase Pcb-Type Inductive Coupler For Wireless Electric Vehicle Charging, Donovin D. Lewis, Omer Onar, Lucas Gastineau, John F. Eastham, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

The cost and manufacturing difficulty of traditionally wound coils for wireless charging of electric vehicles has led to the exploration of alternative manufacturing for scalable deployment at a range of rated powers. A rotating-field polyphase wireless coupler is developed with balanced fully pitched coils which are not possible with conventional Litz wire. The usage of printed circuit board (PCB) technology is proposed for the innovative construction at large dimensions due to reduced cost, increased ease of manufacturability, and potential geometric customization compared to would coils. Design considerations specific to PCBs are detailed for wireless power transfer coils including advantages such …

Comparative Analysis Of Vernier Machines With Spoke, Surface Mounted, And Halbach Pm Rotors For In-Wheel Traction, Ali Mohammadi, Aaron M. Cramer, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

Axial-flux Permanent Magnet (AFPM) machines are well-suited for in-wheel traction in electric vehicles due to their compact structure and higher torque density. This paper presents a large-scale design optimization of an axial-flux permanent magnet vernier machine (PMVM) of the MAGNUS type with a double stator configuration. The active stator features double layer wound coils, while the passive stator is unwound but has a similar profile. The reference design employs a rotor with permanent magnets (PMs) arranged in a spoke-type field intensifying pattern, providing high flux concentration. Design optimization was performed using 3-D electromagnetic Finite Element Analysis (FEA) and the Differential …

On The Optimal Design Of Coreless Afpm Machines With Halbach Array Rotors For Electric Aircraft Propulsion, Matin Vatani, Yaser Chulaee, Ali Mohammadi, David R. Stewart, John F. Eastham, Dan M. Ionel

Electrical and Computer Engineering Graduate Research

This paper presents and evaluates the optimal design of a coreless axial flux permanent magnet (AFPM) motor for electric aircraft propulsion. Ferromagnetic cores are entirely removed from the machine’s structure to improve the specific power density and efficiency. An approach for envelope design optimization of the proposed motor is introduced, considering the polarity as an independent variable and employing an evolutionary algorithm and 3D Finite Element Analysis (FEA). In addition to the proposed electric motor’s electromagnetic performance, fault-tolerant capability and thermal management are considered in the optimization procedure. The optimization results and similar studies from power electronic and thermal management …

Evaluation Of Ten Alternative Treatments For The Management Of Harlequin Bug (Murgantia Histrionica) On Brassica Crops, Sarah Clark, Ricardo Bessin, David J. Gonthier, Jonathan L. Larson

Entomology Faculty Publications

Harlequin bug (Murgantia histrionica) poses a significant threat to cruciferous vegetable crops, leading to economic losses and challenges in sustainable agriculture. This 2-year field study evaluated the efficacy of exclusion netting and selected biopesticides in controlling harlequin bug populations in a field-grown broccoli crop. Treatments included an untreated control, industry standards Azera and Entrust, and ProtekNet mesh netting. Additionally, three commercial essential oil treatments including Essentria IC-3, Nature-Cide, and Zero Tolerance were tested along with two bokashi fermented composting products BrewKashi and Oriental Herbal Nutrient (OHN). During both the first and second year of the study, none of the commercially …

Androgen Aggravates Aortic Aneurysms Via Suppression Of Pd-1 In Mice, Xufang Mu, Shu Liu, Zhuoran Wang, Kai Jiang, Timothy S. Mcclintock, Arnold Stromberg, Alejandro V. Tezanos, Eugene S. Lee, John A. Curci, Ming C. Gong, Zhenheng Guo

Markey Cancer Center Faculty Publications

Androgen has long been recognized for its pivotal role in the sexual dimorphism of cardiovascular diseases, including aortic aneurysms (AAs), a devastating vascular disease with a higher prevalence and fatality rate in men than in women. However, the mechanism by which androgen mediates AAs is largely unknown. Here, we found that male, not female, mice developed AAs when exposed to aldosterone and high salt (Aldo-salt). We revealed that androgen and androgen receptors (ARs) were crucial for this sexually dimorphic response to Aldo-salt. We identified programmed cell death protein 1 (PD-1), an immune checkpoint, as a key link between androgen and …

Active And Retroactive Digital Newspaper Preservation, Andrew Mcdonnell

Library Presentations

This presentation was given at the 2024 International Federation of Library Associations and Institutions News Media Conference in Aarhus, Denmark on May 31, 2024. It illustrates a brief glimpse of the University of Kentucky's Digital Newspaper Preservation program, highlighting challenges presented by two new born-digital additions to the collection.

Disasters And Impacts In Appalachian Kentucky: A Behavioral Health Analysis, Walter David Mathews Phd, Joseph M. Clark, Amy S. Potts

Journal of Appalachian Health

Introduction: Major disasters continue to occur in Appalachian Kentucky with devastating consequences. A major disaster, defined by the Federal Emergency Management Agency (FEMA) as an event too large for a community to manage without outside help, involves emergency responders from the local, state, and federal disaster agencies, plus national volunteers.

Purpose: This paper reports on recent disasters in eight southeast Kentucky counties, the changing nature of these disasters, and the behavioral health impact on the people affected.

Methods: In this large-scale disaster survey in the Appalachian counties in Southeast Kentucky, over 3,500 people were asked about their recent disaster experiences …

Community Needs Assessment Collaboration Following The July 2022 Flooding In Eastern Kentucky, Melissa Slone Dsw, Frances Feltner Dnp, William M. Baker Rn, Anthony S. Lockard Msw, Csw, Angela Raleigh Rd

Journal of Appalachian Health

Rapidly rising waters due to flash floods and thunderstorms on the night of July 27, 2022, resulted in hundreds of water rescues throughout 14 rural Appalachian Kentucky counties. Lives were lost, thousands were injured, homes and property were damaged or destroyed, and many roadways were unpassable. Community partners serving these counties collaborated to design and conduct an assessment to gain a better understanding of the needs of individuals residing in certain remote sections within the communities. The assessment, conducted three months after the flood, collected information regarding flooding impact on housing, physical and behavioral health, transportation, work, and finances.

Paper_Strategic Workforce Solutions In The Coal Ash Industry- Navigating Talent Challenges For Consultants, Civil Companies, And Utilities, Stuart Keeter

World of Coal Ash Proceedings

"Strategic Workforce Solutions in the Coal Ash Industry: Navigating Talent Challenges for Consultants, Civil Companies, and Utilities" Authors Mr. Stuart Keeter - United States - MRI Raleigh Abstract The pervasive shortage of technical and engineering workers has emerged as a pressing concern for companies grappling with extensive infrastructure projects in the United States. In the September/October 2022 issue of Civil Engineering, ASCE’s 2022 president, Dennis Truax, highlights the urgency, noting the need for approximately 25,000 new civil engineers annually according to the US Bureau of Labor Statistics. As an experienced recruiter specializing in heavy civil, consulting, and utility sectors, I …

High Dimensional Data Analysis And Visualization To Demonstrate Compliance, Alex Eklund

World of Coal Ash Proceedings

High Dimensional Data Analysis and Visualization to Demonstrate Compliance Authors Ms. Alex Eklund - United States - TRC Abstract Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) are powerful statistical techniques that can be used to evaluate high dimensional groundwater data generated throughout coal combustion residual (CCR) monitoring programs. These techniques are particularly useful in assessing unanticipated changes in groundwater quality and distinguishing sources of CCR impacts. These methods offer several benefits in the analysis and interpretation of data through: 1) dimensionality reduction and visualization, reducing the dimensionality of the dataset to more easily visualize and make correlations in …

Epa’S Updated Toxicity Criteria For Arsenic-Implications On Coal Ash Sites, Todd Bernhardt, Jay Peters

World of Coal Ash Proceedings

EPA’s Updated Toxicity Criteria for Arsenic: Implications on Coal Ash Sites Authors Mr. Todd Bernhardt - United States - Haley & Aldrich Inc. Mr. Jay Peters - United States - Haley & Aldrich Inc. Abstract In October 2023, the United States Environmental Protection Agency (EPA) released a draft Integrated Risk Information System (IRIS) Toxicological Review of Inorganic Arsenic in which updated toxicity criteria were proposed that are significantly more conservative than the current values. Adoption of the proposed toxicity criteria could have significant implications on risk-based levels for arsenic. Although the Coal Combustion Residuals (CCR) Rule relies on EPA Maximum …

Paper_From Farm To Ash- Deploying An Existing Economical Boron Solution To Ccr Groundwater, Ben Amos, Hariprasad Parthasarathy, Paul Wegner, Peter Schratz

World of Coal Ash Proceedings

From Farm to Ash: Deploying an Existing Economical Boron Solution to CCR Groundwater Authors Dr. Ben Amos - United States - Geosyntec Consultants, Inc. Dr. Hariprasad Parthasarathy - United States - Geosyntec Consultants, Inc. Mr. Paul Wegner - United States - Calcon Mr. Peter Schratz - United States - Calcon Abstract Boron is detected frequently at relatively high concentrations at CCR sites. Boron is currently regulated at CCR sites in several states, with the potential for regulation by USEPA at levels that would trigger corrective action. Due to its (geo)chemical properties, boron is not readily amenable to natural attenuation or …

Coal Ash Landfill Leachate Systems – Design And Treatment, Christine Harris, Rob Orlando

World of Coal Ash Proceedings

Coal Ash Landfill Leachate Systems – Design and Treatment Authors Mrs. Christine Harris - United States - Groundwater Treatment and Technology, LLC (GWTT) Mr. Rob Orlando - United States - Groundwater Treatment and Technology, LLC (GWTT) Abstract Leachate from a coal ash landfill is a highly variable solution which could contain a myriad of constituents as well as varying pH values. The proposed Effluent Limits Guideline limit the discharge of coal ash leachate. This presentation will provide an overview of the design and treatment methods that can be employed to manage this leachate. The first part of the presentation will …

Subtle Geochemical Adjustments In Native Aquifer Soils – In Situ Groundwater Treatment Strategies For Cobalt At Coal Combustion Residual Sites, David Collins, Jim Finley

World of Coal Ash Proceedings

Subtle Geochemical Adjustments in Native Aquifer Soils – In Situ Groundwater Treatment Strategies for Cobalt at Coal Combustion Residual Sites Authors Mr. David Collins - United States - Stantec Mr. Jim Finley - United States - Stantec Abstract Cobalt is frequently observed above the groundwater protection standard (GWPS) downgradient of CCR units. Native aquifer soils have the capacity to influence groundwater geochemistry and play an important role in attenuation of cobalt and other CCR constituents. Geochemical modeling confirmed by bench-scale treatability testing has shown cobalt responds favorably to enhanced attenuation by relatively minor in situ adjustments of geochemical conditions in …

Chimney Drain Construction Lessons Learned, Jason Thaxton

World of Coal Ash Proceedings

WM offers a unique perspective after building and operating several Coal Combustion Residual (CCR) landfills for clients as well as operating CCR monofills at several WM landfills. One feature that has been consistently incorporated into landfill design for our clients is chimney drains. While intended to collect water from exposed CCR surfaces and channel it to the leachate management system, their use requires precise installation and CCR placement to ensure functionality. In working with chimney drains during the construction and closure phases, WM has identified best practices in managing the effectiveness of chimney drains. In sharing our experience for managing …

Paper_Chimney Drain Construction Lessons Learned, Jason Thaxton

World of Coal Ash Proceedings

Chimney Drain Construction Lessons Learned Authors Mr. Jason Thaxton - United States - WM Abstract WM offers a unique perspective after building and operating several Coal Combustion Residual (CCR) landfills for clients as well as operating CCR monofills at several WM landfills. One feature that has been consistently incorporated into landfill design for our clients is chimney drains. While intended to collect water from exposed CCR surfaces and channel it to the leachate management system, their use requires precise installation and CCR placement to ensure functionality. In working with chimney drains during the construction and closure phases, WM has identified …

Beneficially Using Bottom Ash As Landfill Protective Cover, Ryan Doyle

World of Coal Ash Proceedings

The Overall Process of Beneficially Using Bottom Ash as Landfill Protective Cover, an Engineer’s Perspective Authors Mr. Ryan Doyle - United States - AECOM Abstract Using bottom ash as protective cover along the base of a landfill is one way to beneficially use coal combustion residuals (CCR). The bottom ash serves as a filter to prevent finer particles (e.g. fly ash) from clogging the geocomposite liner which transports leachate to the sump of the landfill cell. Understanding the gradation of the bottom ash and the material properties of the geocomposite are imperative to finding the right combination for an effective …

Cutoff Walls For Groundwater Containment And Corrective Action, Dale Evans, Paul Schmall, Jeff Bean

World of Coal Ash Proceedings

Cutoff Walls for Groundwater Containment and Corrective Action Authors Mr. Dale Evans - United States - RECON Dr. Paul Schmall - United States - Keller Mr. Jeff Bean - United States - Keller Abstract With years of pond closure work already completed, there is a recent shift of focus that has been drawing significant attention to perimeter groundwater barriers for corrective action or for containing deep saturated ash below historic groundwater levels. The implementation of perimeter cut-offs is particularly challenging for CCR ponds because of the lack of space outside of these sites, the sensitive environment in which this work …

Example Application Of A Holistic Decision Support Tool Used For Selecting Corrective Actions At Coal Combustion Product Sites, Ari Lewis, John Kondziolka, Matt Biega, Egidio Tentori

World of Coal Ash Proceedings

Example Application of a Holistic Decision Support Tool Used for Selecting Corrective Actions at Coal Combustion Product Sites Authors Ms. Ari Lewis - United States - Gradient Mr. John Kondziolka - United States - Gradient Mr. Matt Biega - United States - Gradient Dr. Egidio Tentori - United States - Gradient Dr. Qian Zhang - United States - Gradient Dr. Ishita Shrivastava - United States - Gradient Mr. Bruce Hensel - United States - Electric Power Research Institute Abstract Gradient developed a holistic decision support tool (HDST) for EPRI to support corrective action alternative assessments at coal combustion product (CCP) …

Paper_Functionality Of Coal Fly Ash In Mortars After Rare Earth Element Recovery, Rahima Tufail, Sai Praneeth, Sarah Brownlee, Timothy Dittrich

World of Coal Ash Proceedings

Rare earth elements (REEs) are a set of 17 elements (lanthanides plus scandium and yttrium) that are not found concentrated in large ore deposits in nature. There has been huge growth in the amount of technology that uses REEs due to their diverse properties, but REEs are difficult to mine and expensive to separate. The global supply of REEs is largely controlled by a single country (China; >95%), and the lack of a domestic supply has been identified as a vulnerability to U.S. economic security. To alleviate this vulnerability, economical extraction methods from traditionally overlooked domestic feedstocks, such coal fly …

Feasibility Of Concurrent Treatment Of Arsenic And Molybdenum Through Co-Precipitation And Adsorption With Case Study And Cost Analysis, Prachi Jain, Brian Colonnese, Jacob Chu

World of Coal Ash Proceedings

Feasibility of Concurrent Treatment of Arsenic and Molybdenum through Co-Precipitation and Adsorption with Case Study and Cost Analysis Authors Mrs. Prachi Jain - United States - Haley & Aldrich, Inc. Mr. Brian Colonnese - United States - Haley & Aldrich, Inc. Dr. Jacob Chu - United States - Haley & Aldrich Inc. Abstract Molybdenum and arsenic are among the Appendix IV constituents required to be monitored under the coal combustion residuals (CCR) Rule. At some CCR sites, arsenic and molybdenum in CCR-impacted groundwater were found concurrently at a level above their groundwater protection standards. In the environment, molybdenum is highly …

Paper_Chemical-Free, High-Volume Leachate Pond Filtration: Commercial Success, Gerard Simon, Jennie Henthorn

World of Coal Ash Proceedings

Several constituents of concern (COC) are problematic for coal ash leachate pond waste management, and even more so with the effluent limitation guidelines continuing to become more stringent. Filtration management of leachate ponds continues to have difficulty with effective removal of metals such as selenium, arsenic and boron to the wastewater discharge allowances. A novel technology has proven success in providing a chemical-free, high-volume alternative to traditional filtration in the coal ash and energy space. The technology meets or exceeds permitted allowances for discharge and is rapidly deployable as a mobile technology in addition to the ability to scale for …

Basewood- ​ Boron Remediation Technology, Allison Kreinberg, Rob Ferree, Duane Graves

World of Coal Ash Proceedings

An Innovative and Cost-Effective Boron Adsorbent Media Authors Ms. Allison Kreinberg - United States - Geosyntec Consultants, Inc. Mr. Rob Ferree - United States - Geosyntec Consultants, Inc. Dr. Duane Graves - United States - Geosyntec Consultants, Inc. Abstract Boron can be an indicator of coal combustion residual (CCR) impacts to groundwater due to its elevated concentration within CCR materials and highly mobile (conservative) geochemical behavior. Groundwater remedial alternatives for boron may be necessary if it is added to the list of assessment monitoring constituents under the Federal CCR Rule (40 CFR 257 Subpart D) or if States elect to …

Coal Ash & The Public – Tell Your Story Before Someone Else Does!, Tim Hancock, Melissa Hedgecoth

World of Coal Ash Proceedings

Coal Ash & the Public – Tell your story before someone else does! Authors Mr. Tim Hancock - United States - Stantec Ms. Melissa Hedgecoth - United States - Tennessee Valley Authority Abstract Nothing travels quite as fast as bad news, and our industry is a convenient target. Technical reports containing 99% good news can become grist for the mill due to a single line or paragraph that feeds a headline, particularly where human health is concerned. Despite data to the contrary, the industry continues to suffer from headlines like: Toxic coal ash: EPA says Alabama doesn't protect public or …