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Full-Text Articles in Entire DC Network
Implementing The Final Ccr Legacy Rule, Robert Glazier, Martha Thomsen, John Seymour, Victor Modeer
Implementing The Final Ccr Legacy Rule, Robert Glazier, Martha Thomsen, John Seymour, Victor Modeer
World of Coal Ash Proceedings
Implementing the Final CCR Legacy Rule Authors Mr. Robert Glazier - United States - Geosyntec Consultants, Inc. Mrs. Martha Thomsen - United States - Baker Botts LLP Mr. John Seymour - United States - Geosyntec Consultants, Inc. Mr. Victor Modeer - United States - Vistra Abstract Inactive surface impoundments at inactive power stations (legacy units) were exempt from the 2015 Federal Coal Combustion Residuals (CCR) Rule. In August 2018, the U.S. Court of Appeals for the D.C. District vacated and remanded that exemption back to the U.S. Environmental Protection Agency (USEPA). On October 14, 2020, USEPA published an Advance Notice …
Impoundment Closure Using Discrete In-Situ Solidification Site Update, Tim Silar, John Magee
Impoundment Closure Using Discrete In-Situ Solidification Site Update, Tim Silar, John Magee
World of Coal Ash Proceedings
Impoundment Closure Using Discrete In-situ Solidification – Site Update Authors Mr. Tim Silar - United States - Silar Services Mr. John Magee - United States - Silar Services Abstract In accordance with USEPA guidance, the protection of groundwater and/or surface water is driving CCP impoundment closures. This presentation will describe an impoundment closure where discrete in-situ solidification is being implemented to achieve USEPA’s requirement of controlling the vertical and horizontal movement of groundwater. The technology, which has gained regulatory approval, will hydraulically isolate the ash from the groundwater by constructing a hydraulic barrier at the bottom of the impoundment using …
Paper_A Practical Approach To Manufacturing Sintered Lightweight Aggregates From Unrecycled Waste Coal Ash, Yousif Alqenai, Mo Balapour, Mohammadamin Zooyousefin, Thuy Nguyen
Paper_A Practical Approach To Manufacturing Sintered Lightweight Aggregates From Unrecycled Waste Coal Ash, Yousif Alqenai, Mo Balapour, Mohammadamin Zooyousefin, Thuy Nguyen
World of Coal Ash Proceedings
The focus of this study was to manufacture sintered lightweight aggregates (LWA) using unrecycled landfill condition waste coal ash (LC-WCA) that has been exposed to a harsh weathering and storage environment for 15-20 years. WCA under field conditions typically consists of an intricate blend of fly ash, bottom ash, boiler slag, flue gas desulfurization, cenosphere, sand, rocks, shells, twigs, and various land minerals. This complicated raw material blend obtained from a Pennsylvania landfill underwent characterization to understand its physical and chemical composition. Microscopy revealed LC-WCA composition consisted of 9% field debris (size ≥600 μm), 43% bottom ash (size 600-75 μm), …
Paper_Coal Combustion Residuals – Productive, Reliable, And Sustainable Approaches To Remediation, Dave Donahue, Faizan Chowdhury, Max Swoboda
Paper_Coal Combustion Residuals – Productive, Reliable, And Sustainable Approaches To Remediation, Dave Donahue, Faizan Chowdhury, Max Swoboda
World of Coal Ash Proceedings
Coal combustion residuals (CCRs) are the second-largest waste material in the U.S., behind household garbage. As such, it is vital that CCRs are correctly managed to prevent environmental damage and safeguard human and animal health. With almost 5 billion tons of coal ash stored by utilities at more than 1,000 sites across the U.S. – whether in ponds as a wet slurry or in landfills as dry powder – preventing leaks into waterways or the air is an industry priority. Every day, Xylem’s experts help power plant operators safely manage CCRs by combining decades of on-the-ground expertise with cutting-edge technology …
Planning & Implementation Of Closure-By-Removal Paired With Beneficial Use, Jay Mokotoff, Angela Casbon-Scheller
Planning & Implementation Of Closure-By-Removal Paired With Beneficial Use, Jay Mokotoff, Angela Casbon-Scheller
World of Coal Ash Proceedings
Planning and Implementation of Closure by Removal Paired with Beneficial Use Authors Mr. Jay Mokotoff - United States - AECOM Mrs. Angela Casbon-Scheller - United States - CenterPoint Energy Abstract While there are numerous ash ponds containing saturated mixed CCR that are closing by removal, few have attempted to beneficially use the mixed CCR materials from these ponds. To comply with the CCR Rule, a large midwestern utility is closing their 170-acre valley-fill ash pond by removal and is successfully recycling the majority of the 6M cubic yards of mixed CCR materials. This presentation will focus on the advance planning …
Removal Of Selenium From Difficult-To-Treat Wastewaters Using An Innovative Reductive-Adsorptive Media, Patrick Mckeown, Madan Tandukar, Steve Woodard, Mike Nickelsen
Removal Of Selenium From Difficult-To-Treat Wastewaters Using An Innovative Reductive-Adsorptive Media, Patrick Mckeown, Madan Tandukar, Steve Woodard, Mike Nickelsen
World of Coal Ash Proceedings
Removal of Selenium from Difficult-to-treat Wastewaters Using an Innovative Reductive-adsorptive Media Authors Mr. Patrick McKeown - United States - ECT2 Dr. Madan Tandukar - United States - ECT2 Dr. Steve Woodard - United States - ECT2 Mr. Mike Nickelsen - United States - ECT2 Abstract Selenium is one of the more difficult-to-treat emerged contaminants, and is mostly prevalent in mining and power wastewater. In water and wastewater, selenium generally exists as soluble oxyanions, selenite (SeO32−) and selenate (SeO42−). Out of these, selenate is the more mobile and prevalent species, which also is more difficult to remove. With increasing focus on …
Best Practices In Implementing, Mark Rokoff
Best Practices In Implementing, Mark Rokoff
World of Coal Ash Proceedings
CASE STUDY: BEST PRACTICES IN IMPLEMENTING THE FACILITY EVALUATION REPORT (PER THE LEGACY CCR SI RULE) Authors Mr. Mark Rokoff - United States - Burns & McDonnell Abstract Corresponding to the proposed Legacy CCR Surface Impoundment Rules (Legacy Rule) published on May 18, 2023, Owner/Operators must initiate the efforts for compliance by first understanding the areas where CCR has accumulated within a plant’s facility outside of a regulated CCR unit. More specifically, one of the first, new tasks to comply with the proposed rule is to develop a Facility Evaluation Report (FER) in which the presence/absence of a CCR management …
A Practical Approach To Manufacturing Sintered Lightweight Aggregates (Lwa) From Unrecycled Waste Coal Ash (Wca), Yousif Alqenai, Mohammadamin Zooyousefin, Thuy Nguyen, Mo Balapour
A Practical Approach To Manufacturing Sintered Lightweight Aggregates (Lwa) From Unrecycled Waste Coal Ash (Wca), Yousif Alqenai, Mohammadamin Zooyousefin, Thuy Nguyen, Mo Balapour
World of Coal Ash Proceedings
A Practical Approach to Manufacturing Sintered Lightweight Aggregates (LWA) from Unrecycled Coal Combustion Ash (CCA) Authors Mr. Yousif Alqenai - United States - Drexel University Mr. Mohammadamin Zooyousefin - United States - Drexel University Ms. Thuy Nguyen - United States - Drexel University Dr. Mo Balapour - United States - SusMaX LLC. Mr. Yaghoob (Amir) Farnam - United States - Drexel University Abstract The focus of this study is to manufacture sintered lightweight aggregates (LWA) using unrecycled landfill condition coal combustion ash (CCA) that has been exposed to a harsh weathering and storage environment for 15-20 years. CCA under field …
Back To Basics, Paul Schmall
Back To Basics, Paul Schmall
World of Coal Ash Proceedings
CCR Dewatering – Back to the Basics Authors Dr. Paul Schmall - United States - Keller Abstract The increase in CCR pond closure activity spurred by the EPA’s 2015 rule publication has created a tremendous opportunity to innovate with respect to traditional methods of safely working around and on saturated CCR material. The volume of work and the speed at which it must be completed requires that the industry adapt in order to meet regulatory timelines. One technique that has been successfully implemented is the use of conventional construction dewatering technology to stabilize CCR by reducing and controlling pore pressures. …
Paper_Dry Fgd Byproduct Characteristics And Utilization In China – Development And Trends, Qingfa Su, Muh-Cheng Wu, Jianchun Wang, Cangeng Xu
Paper_Dry Fgd Byproduct Characteristics And Utilization In China – Development And Trends, Qingfa Su, Muh-Cheng Wu, Jianchun Wang, Cangeng Xu
World of Coal Ash Proceedings
Dry FGD process is a major FGD technology other than wet FGD process and has been widely used in China. In the last decade, it has been successfully applied not only to coal-fired power plants, but also to iron and steel sintering and pelleting plants, glass kilns, carbon black, aluminum, catalytic cracking, coking and other industry installations. In contrast to gypsum produced from wet FGD process, characteristics of dry FGD byproducts are often site-specific, depending on source flue gas compositions, unit operations, operating conditions, and other factors. These could affect dry FGD byproduct performance in utilization applications and generated products. …
Planning For The Future Of Beneficial Use, Gabe Lang, Don Fuller Ii, Nortey Yeboah
Planning For The Future Of Beneficial Use, Gabe Lang, Don Fuller Ii, Nortey Yeboah
World of Coal Ash Proceedings
Planning for the Future of Beneficial Use Authors Mr. Gabe Lang - United States - Watershed Geo Mr. Don Fuller II - United States - Stantec Mr. Nortey Yeboah - United States - Southern Company Abstract The future need for fly ash and other CCR’s for beneficial use purposes, following the decommissioning of fossil plants, has been well documented within the industry. Plant shutdowns will result in a market shortage for the ready-mix concrete and other industries that support key infrastructure within the U.S. In addition, CCR units are closing under the EPA CCR Rule, a process that will continue …
Pvc Liner Interface Friction & Slope Stability, John Klamut, Ron Harris, James Shields
Pvc Liner Interface Friction & Slope Stability, John Klamut, Ron Harris, James Shields
World of Coal Ash Proceedings
PVC LINER INTERFACE FRICTION AND SLOPE STABILITY Authors Mr. John Klamut - United States - GAI Consultants, Inc. Mr. Ron Harris - United States - GAI Consultants, Inc. Mr. James Shields - United States - GAI Consultants, Inc. Abstract PVC liners have been used for numerous CCR landfill liner systems. In general, the industry has moved away from the use of PVC liners in favor of HDPE or LLDPE geomembranes. An important reason for this shift is due to the veneer stability of PVC liner systems when compared to HDPE or LLPE geomembrane liner systems. The results of stability analyses …
Ccr Landfills – Part 2: Using A Graphical Interpretation With Model Simulations To Predict Groundwater Elevations During And After Ccr Landfill Construction, Jerry Wylie, Rong Yu
Ccr Landfills – Part 2: Using A Graphical Interpretation With Model Simulations To Predict Groundwater Elevations During And After Ccr Landfill Construction, Jerry Wylie, Rong Yu
World of Coal Ash Proceedings
State solid waste regulations require the post-settlement bottom elevation of the base liner system of a CCR landfill to be a minimum of 4 feet above the long-term seasonal high (LTSH) groundwater table prior to operation. During landfill sump construction, standing water was observed outside of and within the sump footprint. Because the landfill base liner had been placed, direct groundwater measurements were not feasible by installing piezometers within the sump. Using groundwater elevation data from piezometers outside of the landfill, historical measurements within the landfill near the sump, data from surveys and photogrammetry, and previous groundwater flow model simulations, …
The Legacy Ash Rule- Can Beneficial Reuse Be A Solution, Tom Kierspe
The Legacy Ash Rule- Can Beneficial Reuse Be A Solution, Tom Kierspe
World of Coal Ash Proceedings
THE LEGACY ASH RULE: CAN BENEFICIAL REUSE BE A SOLUTION? Authors Mr. Tom Kierspe - United States - The SEFA Group, LLC Abstract Tom Kierspe, P.E.1 1The SEFA Group, 219 Cedar Road, Lexington, SC 29073 KEYWORDS: Coal Ash Beneficiation, Beneficial Reuse, Encapsulated Reuse, Coal Ash Recycling, Thermal Beneficiation, Pond Reclamation, STAR Process, Stakeholders, CCP Impoundments, Characterization ABSTRACT On May 18, 2023, EPA proposed changes to the CCR regulations for inactive surface impoundments at inactive electric utilities, referred to as “legacy CCR surface impoundments”. With the final rule currently proposed to be issued April 2024, utilities are reevaluating these sites. Much …
Constructing A Landfill In A Former Ccr Basin, Kory Anstead
Constructing A Landfill In A Former Ccr Basin, Kory Anstead
World of Coal Ash Proceedings
Design and Construction Challenges with Construction of a Landfill in a Former CCR Basin Authors Mr. Kory Anstead - United States - AECOM Abstract Utilizing best engineering practices and discussing lessons learned associated with challenges encountered during construction of a landfill for CCR materials in a former CCR basin. Challenges encountered included higher than anticipated groundwater conditions, presence of rock at higher elevations, not feasible to construct one of the sediment basins due to ash excavation sequence, softer subgrade conditions, and storm water management. These challenges were mainly the result of limitations in access to investigate future landfill area located …
Implementing Automation And Smart Pumping Systems In Ccr Projects, Dave Donahue, Faizan Chowdhury
Implementing Automation And Smart Pumping Systems In Ccr Projects, Dave Donahue, Faizan Chowdhury
World of Coal Ash Proceedings
Implementing automation and SMART pumping systems in CCR projects for improved water collection, treatment, and discharge Authors Mr. Dave Donahue - United States - Xylem Mr. Faizan Chowdhury - United States - Xylem Abstract Smart Technology, Sustainability, Discharge Regulations Safe, sustainable management of spent coal combustion products remains a critical priority for the power generation and coal ash industries. Companies must implement reliable, efficient recycling and remediation programs that minimize environmental impact and operational costs, while protecting people and equipment. Today’s pumps conduct real-time monitoring of site conditions providing information to the user, such as rainfall amounts, well levels, flow …
Paper_Modeling In Support Of Dewatering And Closure Construction Of An Upstream Raise Ccr Surface Impoundment, Craig Schuettpelz, Tanya Walkenbach, Todd Stong, Shane Stockdill
Paper_Modeling In Support Of Dewatering And Closure Construction Of An Upstream Raise Ccr Surface Impoundment, Craig Schuettpelz, Tanya Walkenbach, Todd Stong, Shane Stockdill
World of Coal Ash Proceedings
Modeling in Support of Dewatering and Closure Construction of an Upstream Raise CCR Surface Impoundment Authors Mr. Craig Schuettpelz - United States - WSP USA Dr. Tanya Walkenbach - United States - WSP USA Mr. Todd Stong - United States - WSP USA Mr. Shane Stockdill - United States - Rainbow Energy Center Abstract A composite-lined upstream raise coal combustion residual (CCR) surface impoundment at Rainbow Energy Center’s (REC’s) Coal Creek Station ceased receipt of CCR in 2021. During operation, flue gas desulfurization (FGD) material was sluiced into the middle of the facility, which was ringed by drainage and structural …
Wwccpn- On The Stretch From Suitability To Sustainability, Craig Heidrich, Jinder Jow, Thomas Adams, Hans-Joachim Feuerborn
Wwccpn- On The Stretch From Suitability To Sustainability, Craig Heidrich, Jinder Jow, Thomas Adams, Hans-Joachim Feuerborn
World of Coal Ash Proceedings
Coal Combustion Products Worldwide - On the Stretch from Suitability to Sustainability Authors Mr. Craig Heidrich - Australia - Ash Development Association of Australia Dr. Jinder Jow - China - China Coal Ash Professional Committee Mr. Thomas Adams - United States - American Coal Ash Association (ACAA) Dr. Hans-Joachim Feuerborn - Germany - ECOBA Abstract Coal is used worldwide for energy and heat production with pros and cons and restrictions or phase-out decision in parts of the world for environmental reasons. At the COP28 conference in December 2023 in Dubai more than 200 parties confirmed the 1.5 degree Celsius limit …
Dewatering Optimization Strategies In Support Of Closure By Removal (Cbr) To Accelerate Groundwater Cleanup At Coal Combustion Residual Sites (Ccr) With Case Study, Sean Larkin, Jacob Chu
Dewatering Optimization Strategies In Support Of Closure By Removal (Cbr) To Accelerate Groundwater Cleanup At Coal Combustion Residual Sites (Ccr) With Case Study, Sean Larkin, Jacob Chu
World of Coal Ash Proceedings
Dewatering Optimization Strategies in Support of Closure by Removal (CBR) to Accelerate Groundwater Cleanup at CCR Sites with Case Study Authors Mr. Sean Larkin - United States - Haley & Aldrich Inc. Dr. Jacob Chu - United States - Haley & Aldrich Inc. Abstract This presentation is focused on coal combustion residual (CCR) sites in corrective action that are performing closure-by-removal (CBR) in support of an overall groundwater remedy. CBR is often coupled with a variety of groundwater treatment options, including (but not limited to), monitored natural attenuation and/or contingent active or passive treatment of areas within the plume where …
Potential Failure Mode Analysis For Groundwater Collection Trench Between A Ccr Landfill Dike And A River, John Seymour, Onur Tastan, Paul Sabatini, Victor Modeer
Potential Failure Mode Analysis For Groundwater Collection Trench Between A Ccr Landfill Dike And A River, John Seymour, Onur Tastan, Paul Sabatini, Victor Modeer
World of Coal Ash Proceedings
Potential Failure Mode Analysis for Groundwater Collection Trench Between a CCR Landfill Berm and a River Authors Mr. John Seymour - United States - Geosyntec Consultants, Inc. Dr. Onur Tastan - United States - Geosyntec Consultants, Inc. Dr. Paul Sabatini - United States - Geosyntec Consultants, Inc. Mr. Victor Modeer - United States - Vistra Mr. Isaiah Vaught - United States - Geosyntec Consultants, Inc. Abstract A potential failure mode analysis (PFMA) was conducted to assess the risks of failure for the construction of a groundwater collection trench located between the containment berm of a CCR landfill and a river. …
Integrated Approach Of Plant D&D And Ccr Closure, Cassie Dumoulin, Mark Rokoff
Integrated Approach Of Plant D&D And Ccr Closure, Cassie Dumoulin, Mark Rokoff
World of Coal Ash Proceedings
With the impending finalization of the proposed legacy CCR SI Rule, several changes are expected to the definition and requirements for legacy CCR sites including CCRMUs. As utilities prepare to conduct the CCRMU Facility Evaluation Reports for legacy CCR sites, the challenge is now knowing where to look and anticipate where CCR may be. This presentation provides a description of the CCR that has been located/discovered as part of the demolition and decommissioning (D&D) of former coal-fired power plants and based on these historical locations the anticipated challenges as utilities address requirements within the proposed legacy CCR SI Rule. Case …
Beneficial Use Of Harvested Ponded Fly Ash And Landfilled Fgd Materials For High-Volume Surface Mine Reclamation, Tarunjit Butalia
Beneficial Use Of Harvested Ponded Fly Ash And Landfilled Fgd Materials For High-Volume Surface Mine Reclamation, Tarunjit Butalia
World of Coal Ash Proceedings
Use of Harvested Fly Ash and LandfilledFGD Materials for Mine Reclamation Authors Dr. Tarunjit Butalia - United States - The Ohio State University Abstract In this work, The Ohio State University will present a full-scale demonstration project at the now-defunct Conesville power plant in Ohio, at which fly ash was harvested from a closed-out ash pond and stabilized FGD material recovered from a closed-out landfill to reclaim an abandoned surface mine. Site monitoring results will be presented.
Ccr Landfills – Part 1: Groundwater Considerations During Design And Construction, Johnathan Ebenhack, Jerry Wylie
Ccr Landfills – Part 1: Groundwater Considerations During Design And Construction, Johnathan Ebenhack, Jerry Wylie
World of Coal Ash Proceedings
The Environmental Protection Agency (EPA) Coal Combustion Residuals Rule (CCR Rule) and state regulations have resulted in the closure of unlined CCR units throughout the United States. Placing CCR material in newly constructed on-site landfills is a common approach to disposing of CCR material. Landfills constructed in or near unlined units during basin closure activities may be constructed under transient groundwater conditions that should be accounted for during landfill design and construction. Understating historical, current, and future groundwater conditions during design and construction can have major impacts on the success of new CCR landfill construction projects. Unforeseen transient high groundwater …
Path Forward To Ccr Conveyor Solutions, Mike Peden, Don Fuller Ii
Path Forward To Ccr Conveyor Solutions, Mike Peden, Don Fuller Ii
World of Coal Ash Proceedings
CCR Unit closures and related beneficial use operations are centric to moving large volumes of material, predominantly, synthetic gypsum, fly ash and bottom ash. While trucking is the core haulage solution, site specific conditions do shift to conveyors as the optimal solution in many cases. While today many CCR closure plans and material handling processes are tentatively established, changes in anticipated material volumes cause increased focus on CCR harvesting, and the pending Legacy Rule or other regulatory action(s) may warrant reevaluation of the material transport alternatives. This presentation provides an overview of large scale CCR transport options, core strategies for …
Chemically Induced Cone Degeneration In The 13-Lined Ground Squirrel, Hannah M. Follett, Emma Warr, Jenna Grieshop, Ching Tzu Yu, Mina Gaffney, Owen R. Bowie, Jong Won Lee, Sergey Tarima, Dana K. Merriman, Joseph Carroll
Chemically Induced Cone Degeneration In The 13-Lined Ground Squirrel, Hannah M. Follett, Emma Warr, Jenna Grieshop, Ching Tzu Yu, Mina Gaffney, Owen R. Bowie, Jong Won Lee, Sergey Tarima, Dana K. Merriman, Joseph Carroll
Biostatistics Faculty Publications
Animal models of retinal degeneration are critical for understanding disease and testing potential therapies. Inducing degeneration commonly involves the administration of chemicals that kill photoreceptors by disrupting metabolic pathways, signaling pathways, or protein synthesis. While chemically induced degeneration has been demonstrated in a variety of animals (mice, rats, rabbits, felines, 13-lined ground squirrels (13-LGS), pigs, chicks), few studies have used noninvasive high-resolution retinal imaging to monitor the in vivo cellular effects. Here, we used longitudinal scanning light ophthalmoscopy (SLO), optical coherence tomography, and adaptive optics SLO imaging in the euthermic, cone-dominant 13-LGS (46 animals, 52 eyes) to examine retinal structure …
Ultra‐Fast Finite Element Analysis Of Coreless Axial Flux Permanent Magnet Synchronous Machines, Yaser Chulaee, Dan Ionel
Ultra‐Fast Finite Element Analysis Of Coreless Axial Flux Permanent Magnet Synchronous Machines, Yaser Chulaee, Dan Ionel
Power and Energy Institute of Kentucky Faculty Publications
Large‐scale design optimisation techniques enable the design of high‐performance electric machines. Electromagnetic 3D finite element analysis (FEA) is typically employed in optimisation studies for accurate analysis of axial flux permanent magnet(AFPM) machines, which require extensive computational resources. To reduce the computational burden, a FEA‐based mathematical method relying on the geometric and magnetic symmetry of coreless AFPM machines is proposed to estimate the machine performance indicators using the least number of FEA solutions, thereby significantly lowering the running time. This method is generally applicable to AFPM machines with low saturation effects and cogging torque as exemplified for a printed circuit board …
Predicting The Pathway Involvement Of Metabolites Based On Combined Metabolite And Pathway Features, Erik D. Huckvale, Hunter N. B. Moseley
Predicting The Pathway Involvement Of Metabolites Based On Combined Metabolite And Pathway Features, Erik D. Huckvale, Hunter N. B. Moseley
Markey Cancer Center Faculty Publications
A major limitation of most metabolomics datasets is the sparsity of pathway annotations for detected metabolites. It is common for less than half of the identified metabolites in these datasets to have a known metabolic pathway involvement. Trying to address this limitation, machine learning models have been developed to predict the association of a metabolite with a “pathway category”, as defined by a metabolic knowledge base like KEGG. Past models were implemented as a single binary classifier specific to a single pathway category, requiring a set of binary classifiers for generating the predictions for multiple pathway categories. This past approach …
Design Optimization Of A Direct-Drive Wind Generator With A Reluctance Rotor And A Flux Intensifying Stator Using Different Pm Types, Ali Mohammadi, Oluwaseun A. Badewa, Yaser Chulaee, Donovin D. Lewis, Somasundaram Essakiappan, Madhav Manjrekar, Dan M. Ionel
Design Optimization Of A Direct-Drive Wind Generator With A Reluctance Rotor And A Flux Intensifying Stator Using Different Pm Types, Ali Mohammadi, Oluwaseun A. Badewa, Yaser Chulaee, Donovin D. Lewis, Somasundaram Essakiappan, Madhav Manjrekar, Dan M. Ionel
Power and Energy Institute of Kentucky Faculty Publications
This paper presents a large-scale multi-objective design optimization for a direct-drive wind turbine generator concept that is based upon an experimentally validated computational model for a small-scale prototype motor of the same type. By integrating an outer reluctance-type rotor and a segmented stator with toroidally wound single-coil modules containing spoke-type PMs, the design optimization aims to minimize losses, active mass, and torque ripple while adhering to a power factor constraint. The AC windings and PMs are positioned in the stator and this concept enhances flux concentration, enabling the use of more affordable high energy non-rare-earth (special type) magnets. The exterior …
Optimization, Characterization, And Comparison Of Two Luciferase-Expressing Mouse Glioblastoma Models, Louis Rodgers, Julia A. Schulz Pauly, Bryan J. Maloney, Anika M. S. Hartz, Bjoern Bauer
Optimization, Characterization, And Comparison Of Two Luciferase-Expressing Mouse Glioblastoma Models, Louis Rodgers, Julia A. Schulz Pauly, Bryan J. Maloney, Anika M. S. Hartz, Bjoern Bauer
UK CARES Faculty Publications
Glioblastoma (GBM) is the most aggressive brain cancer. To model GBM in research, orthotopic brain tumor models, including syngeneic models like GL261 and genetically engineered mouse models like TRP, are used. In longitudinal studies, tumor growth and the treatment response are typically tracked with in vivo imaging, including bioluminescence imaging (BLI), which is quick, cost-effective, and easily quantifiable. However, BLI requires luciferase-tagged cells, and recent studies indicate that the luciferase gene can elicit an immune response, leading to tumor rejection and experimental variation. We sought to optimize the engraftment of two luciferase-expressing GBM models, GL261 Red-FLuc and TRP-mCherry-FLuc, showing differences …
Influence Of Four Veterinary Antibiotics On Constructed Treatment Wetland Nitrogen Transformation, Matthew Russell, Tiffany L. Messer, Deborah A. Report, Richard L. Smith, Shannon L. Bartelt-Hunt, Daniel D. Snow, Ariel P. Reed
Influence Of Four Veterinary Antibiotics On Constructed Treatment Wetland Nitrogen Transformation, Matthew Russell, Tiffany L. Messer, Deborah A. Report, Richard L. Smith, Shannon L. Bartelt-Hunt, Daniel D. Snow, Ariel P. Reed
UK CARES Faculty Publications
The use of wetlands as a treatment approach for nitrogen in runoff is a common practice in agroecosystems. However, nitrate is not the sole constituent present in agricultural runoff and other biologically active contaminants have the potential to affect nitrate removal efficiency. In this study, the impacts of the combined effects of four common veterinary antibiotics (chlortetracycline, sulfamethazine, lincomycin, monensin) on nitrate-N treatment efficiency in saturated sediments and wetlands were evaluated in a coupled microcosm/mesocosm scale experiment. Veterinary antibiotics were hypothesized to significantly impact nitrogen speciation (e.g., nitrate and ammonium) and nitrogen uptake and transformation processes (e.g., plant uptake and …