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Acute Stressors Do Not Impair Short-Term Memory Or Attention In An Aged Mouse Model Of Amyloidosis, Giuliana M. Dimarco, Breanna N. Harris, Alena V. Savonenko, Paul L. Soto Jan 2023

Acute Stressors Do Not Impair Short-Term Memory Or Attention In An Aged Mouse Model Of Amyloidosis, Giuliana M. Dimarco, Breanna N. Harris, Alena V. Savonenko, Paul L. Soto

Faculty Publications

Memory impairment in Alzheimer’s disease patients is thought to be associated with the accumulation of amyloid-beta peptides and tau proteins. However, inconsistent reports of cognitive deficits in pre-clinical studies have raised questions about the link between amyloid-beta and cognitive decline. One possible explanation may be that studies reporting memory deficits often involve behavioral assessments that entail a high stress component. In contrast, in tasks without a high stress component transgenic mice do not consistently show declines in memory. The glucocorticoid cascade hypothesis of aging and the vicious cycle of stress framework suggest that stress exacerbates dementia progression by initiating a …

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A Review Of The Fundamental Concepts Of Cfd For Novice Users In Building Research And Design, Soo Jeong Jo, James R. Jones Jan 2023

A Review Of The Fundamental Concepts Of Cfd For Novice Users In Building Research And Design, Soo Jeong Jo, James R. Jones

Faculty Publications

Computational Fluid Dynamics (CFD) has been known as the most effective method for airflow analyses, but its complexity has been a barrier to dissemination in the building industry. Although, there have been continuous efforts to simplify the simulation process and develop more user-friendly CFD tools for novice users with reduced complexity, utilizing the tools without understanding the fundamental knowledge may bring about misleading results. The purpose of the present study is to help novice users understand the configuration process of building simulations using CFD by reviewing the fundamental concepts and proposing a framework for a simulation process in interaction with …

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Horizon Scanning For Potentially Invasive Non-Native Marine Species To Inform Trans-Boundary Conservation Management – Example Of The Northern Gulf Of Mexico, Kathryn A. O’Shaughnessy, Lorenzo Vilizzi, Wesley Daniel, Monica E. Mcgarrity, Hanna Bauer, Leslie Hartman, Stephen Geiger, Paul Sammarco, Steve Kolian, Scott Porter, Jessica Dutton, Matthew R. Mcclure, Michael Norberg, Alex Fogg, Timothy J. Lyons, Justin Procopio, Lauren Bantista, Wayne Bennett, Mary Wicksten, David Reeves, Julie Lively, Elizabeth Robinson, Jorge Brenner, Joseph Goy, Ashley Morgan-Olvera, Anna L.E. Yunnie, Gordon H. Copp Jan 2023

Horizon Scanning For Potentially Invasive Non-Native Marine Species To Inform Trans-Boundary Conservation Management – Example Of The Northern Gulf Of Mexico, Kathryn A. O’Shaughnessy, Lorenzo Vilizzi, Wesley Daniel, Monica E. Mcgarrity, Hanna Bauer, Leslie Hartman, Stephen Geiger, Paul Sammarco, Steve Kolian, Scott Porter, Jessica Dutton, Matthew R. Mcclure, Michael Norberg, Alex Fogg, Timothy J. Lyons, Justin Procopio, Lauren Bantista, Wayne Bennett, Mary Wicksten, David Reeves, Julie Lively, Elizabeth Robinson, Jorge Brenner, Joseph Goy, Ashley Morgan-Olvera, Anna L.E. Yunnie, Gordon H. Copp

Faculty Publications

Prevention of non-native species introductions and establishment is essential to avoid adverse impacts of invasive species in marine environments. To identify potential new invasive species and inform non-native species management options for the northern Gulf of Mexico (Alabama, Mississippi, Louisiana, Texas), 138 marine species were risk screened for current and future climate conditions using the Aquatic Species Invasiveness Screening Kit. Species were risk-ranked as low, medium, high, and very high risk based on separate (calibrated) thresholds for fishes, tunicates, and inverte-brates. In the basic screening, 15 fishes, two tunicates, and 26 invertebrates were classified as high or very high risk …

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Mapping High Marsh And Salt Pannes/Flats Along The Northern Gulf Of Mexico Coast, Nicholas M. Enwright, Wyatt C. Cheney, Kristine O. Evans, Hana R. Thurman, Mark S. Woodrey, Auriel M.V. Fournier, Jena A. Moon, Heather E. Levy, James A. Cox, Peter J. Kappes, John A. Nyman, Jonathan L. Pitchford Jan 2023

Mapping High Marsh And Salt Pannes/Flats Along The Northern Gulf Of Mexico Coast, Nicholas M. Enwright, Wyatt C. Cheney, Kristine O. Evans, Hana R. Thurman, Mark S. Woodrey, Auriel M.V. Fournier, Jena A. Moon, Heather E. Levy, James A. Cox, Peter J. Kappes, John A. Nyman, Jonathan L. Pitchford

Faculty Publications

Coastal wetlands are predicted to undergo extensive transformation due to climate and land use change. Baseline maps of coastal wetlands can be used to help assess changes. Found in the upper portion of the estuarine zone, high marsh and salt pannes/flats provide ecosystem goods and services and are particularly important to fish and wildlife. We developed the first map of high marsh and salt pannes/flats along the northern Gulf of Mexico using regional models that included spectral indices related to greenness and wetness from optical satellite imagery, elevation data, irregularly flooded wetland probability information, and synthetic aperture radar backscatter. We …

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Rbp4-Gal4, A Germline Driver That Activates In Meiosis, Reveals Functions For Vcp In Spermatid Development, Tyler J. Butsch, Alyssa E. Johnson, K. Adam Bohnert Jan 2023

Rbp4-Gal4, A Germline Driver That Activates In Meiosis, Reveals Functions For Vcp In Spermatid Development, Tyler J. Butsch, Alyssa E. Johnson, K. Adam Bohnert

Faculty Publications

Valosin-containing protein (VCP) is a versatile and ubiquitously expressed AAA+ ATPase that regulates multiple stages of Drosophila spermatogenesis. While VCP has documented roles in mitotic spermatogonia and meiotic spermatocytes, it is also highly expressed in post-meiotic spermatids, suggesting potential late-stage developmental functions as well. However, tools to assess late-stage activities of pleiotropic spermatogenesis genes such as VCP are lacking. Available germline-specific Gal4 drivers activate in stem cells or spermatogonia; consequently, knocking down VCP using one of these drivers disrupts or blocks early germ-cell development, precluding analysis of VCP in later stages. A Gal4 driver that activates later in development, such …

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Identification Of Oral Therapeutics Using An Ai Platform Against The Virus Responsible For Covid-19, Sars-Cov-2, Adam Bess, Frej Berglind, Supratik Mukhopadhyay, Michal Brylinski, Chris Alvin, Fanan Fattah, Kishor M. Wasan Jan 2023

Identification Of Oral Therapeutics Using An Ai Platform Against The Virus Responsible For Covid-19, Sars-Cov-2, Adam Bess, Frej Berglind, Supratik Mukhopadhyay, Michal Brylinski, Chris Alvin, Fanan Fattah, Kishor M. Wasan

Faculty Publications

Purpose: This study introduces a sophisticated computational pipeline, eVir, designed for the discovery of antiviral drugs based on their interactions within the human protein network. There is a pressing need for cost-effective therapeutics for infectious diseases (e.g., COVID-19), particularly in resource-limited countries. Therefore, our team devised an Artificial Intelligence (AI) system to explore repurposing opportunities for currently used oral therapies. The eVir system operates by identifying pharmaceutical compounds that mirror the effects of antiviral peptides (AVPs)—fragments of human proteins known to interfere with fundamental phases of the viral life cycle: entry, fusion, and replication. eVir extrapolates the probable antiviral efficacy …

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Wooing “Willing Dupes”: The Bush Administration’S Use Of Emotional Language In The Drive Toward War With Iraq, Michael F. Russo Jan 2023

Wooing “Willing Dupes”: The Bush Administration’S Use Of Emotional Language In The Drive Toward War With Iraq, Michael F. Russo

Faculty Publications

The publicly available texts of the George W. Bush administration from September 11, 2001, to March 19, 2003, as presented in The Public Papers of the Presidents of the United States, were analyzed for word frequency and the words themselves analyzed for emotional weight using the NRC Emotion Intensity Lexicon. Transcripts of six television news agencies (ABC, CBS, NBC, CNN, FOX, and PBS) were also analyzed for word frequency to determine the extent to which these agencies may have repeated and consequently amplified the rhetoric of the administration. Public opinion polling for this same period was examined in an …

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Black:White Health Inequalities, Genes Versus Environment—A New Chapter?, Richard Cooper Jan 2023

Black:White Health Inequalities, Genes Versus Environment—A New Chapter?, Richard Cooper

Faculty Publications

No abstract provided.

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Biochemical Alterations In The Follicular Fluid Of Bovine Peri-Ovulatory Follicles And Their Association With Final Oocyte Maturation, Noof Abdulrahman Alrabiah, Constantine A. Simintiras, Alexander C.O. Evans, Patrick Lonergan, Trudee Fair Jan 2023

Biochemical Alterations In The Follicular Fluid Of Bovine Peri-Ovulatory Follicles And Their Association With Final Oocyte Maturation, Noof Abdulrahman Alrabiah, Constantine A. Simintiras, Alexander C.O. Evans, Patrick Lonergan, Trudee Fair

Faculty Publications

Follicular fluid (FF), a product of vascular transudate and granulosa and thecal cell secretions, is the milieu that has evolved to support oocyte growth and maturation which plays a central role in oocyte quality determination. Therefore, a suboptimal FF composition may be reflected in compromised oocyte progression through maturation, fertilization, or embryo development. To date, the composition of bovine FF remains understudied. To address this, we comprehensively characterized the metabolomic constituency of bovine FF in the period during which the oocyte undergoes meiotic maturation. More specifically, FF from pre (-24 h) and peri (-2 h)-ovulatory follicles was profiled by high-throughput …

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Optimization Of Lycopene Extraction From Tomato Pomace And Effect Of Extract On Oxidative Stability Of Peanut Oil, Dinh Thi Tran, Lan Thi Hoang Nguyen, Cuong Ngoc Nguyen, Maarten L.A.T.M. Hertog, Bart Nicolaï, David Picha Jan 2023

Optimization Of Lycopene Extraction From Tomato Pomace And Effect Of Extract On Oxidative Stability Of Peanut Oil, Dinh Thi Tran, Lan Thi Hoang Nguyen, Cuong Ngoc Nguyen, Maarten L.A.T.M. Hertog, Bart Nicolaï, David Picha

Faculty Publications

Lycopene, the pigment principally responsible for the red colour of tomatoes, is well-known for its strong antioxidant property and substantial health benefits. In this study, the optimal combination of factors for lycopene extraction from tomato pomace was identified using response surface methodology. The best practically feasible results maximising both lycopene yield and antioxidant activity of the extract were obtained by applying a ratio of ethyl acetate to tomato waste of 35:1 (v/w), at a temperature of 55°C for 100 min of extraction. The extract was then added to the peanut oil to evaluate its oxidative stability during 60 days of …

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Comprehensive Meta-Analysis Of Qtl And Gene Expression Studies Identify Candidate Genes Associated With Aspergillus Flavus Resistance In Maize, Niranjan Baisakh, Eduardo A. Da Silva, Anjan K. Pradhan, Kanniah Rajasekaran Jan 2023

Comprehensive Meta-Analysis Of Qtl And Gene Expression Studies Identify Candidate Genes Associated With Aspergillus Flavus Resistance In Maize, Niranjan Baisakh, Eduardo A. Da Silva, Anjan K. Pradhan, Kanniah Rajasekaran

Faculty Publications

Aflatoxin (AF) contamination, caused by Aspergillus flavus, compromises the food safety and marketability of commodities, such as maize, cotton, peanuts, and tree nuts. Multigenic inheritance of AF resistance impedes conventional introgression of resistance traits into high-yielding commercial maize varieties. Several AF resistance-associated quantitative trait loci (QTLs) and markers have been reported from multiple biparental mapping and genome-wide association studies (GWAS) in maize. However, QTLs with large confidence intervals (CI) explaining inconsistent phenotypic variance limit their use in marker-assisted selection. Meta-analysis of published QTLs can identify significant meta-QTLs (MQTLs) with a narrower CI for reliable identification of genes and linked markers …

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The Inheritance Of Energy And The Evolution Of Unsustainability, Brian Snyder Jan 2023

The Inheritance Of Energy And The Evolution Of Unsustainability, Brian Snyder

Faculty Publications

Across contemporary and historical human groups, there is variation in how cultures interact with the environment and this variation is inherited through culture. Some human-environment relationships maximize group fitness relative to other relationships. Thus, there is heritable, fitness-associated variation in human-environment interactions and so human-environment interactions may be understood to be an evolved trait. However, one fitness-maximizing human-environment relationship could be unsustainable resource extraction. Anthroecological theory proposes that human cultures and genotypes have been selected for unsustainability, although several mechanisms have been proposed for how this selection may have worked. Here, I extend anthroecological theory and argue that energy inheritances …

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Charting The Course To Advance Dei In The Ocean Sciences A Case Study, Christopher F. D’Elia, Katherine Falls, Sibel Bargu, Linda Hooper-Bùi Jan 2023

Charting The Course To Advance Dei In The Ocean Sciences A Case Study, Christopher F. D’Elia, Katherine Falls, Sibel Bargu, Linda Hooper-Bùi

Faculty Publications

The Louisiana State University College of the Coast & Environment (LSU CC&E) developed a multi-faceted strategic initiative to increase its diversity, equity, and inclusion. Elements of this initiative began one-by-one over the last decade and were aggregated into a comprehensive implementation plan—the 2020 CC&E Diversity, Equity, and Inclusion Action Plan. Based on best practices in the “physical sciences” (i.e., geosciences, including oceanography), the plan aims to augment recruitment and retention using limited resources and personnel. The long-range goal is to increase the number of PhD graduates from underrepresented groups by employing strategies that start at the 6–12th grade level. The …

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Simulating Grain Shape Effects And Damage In Granular Media Using Peridem, Debdeep Bhattacharya, Robert P. Lipton Jan 2023

Simulating Grain Shape Effects And Damage In Granular Media Using Peridem, Debdeep Bhattacharya, Robert P. Lipton

Faculty Publications

We provide a numerical platform for the analysis of particle shape and topology effect on the macroscopic behavior of granular media. We work within a discrete element method (DEM) framework and apply a peridynamic model for deformable particles accounting for deformation and damage of individual particles. To accommodate arbitrary particle shapes including nonconvex ones as well as particle topology, an efficient method is developed to keep intraparticle peridynamic interaction within particle boundaries. Particle contact with the rigid boundary wall is computed analytically to improve accuracy. To speed up simulations with particles of different shapes and sizes the initial configuration is …

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Local Observer For Parameters And For State Variables Of Nonlinear Systems, Frederic Mazenc, Michael Malisoff Jan 2023

Local Observer For Parameters And For State Variables Of Nonlinear Systems, Frederic Mazenc, Michael Malisoff

Faculty Publications

We provide new observer designs to simultaneously identify parameters and states of systems whose nonlinearities have order two near the origin, which include cubic terms arising in the study of jump phenomena, process control, and bistable models of aerospace systems. This yields local exponential convergence of the state estimation error to zero, basin of attraction estimates, and fixed time parameter identification. We illustrate our result using Duffing's equation, whose cubic term puts it outside the scope of prior methods.

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Reference Governor Design In The Presence Of Uncertain Polynomial Constraints, Rick Schieni, Chengwei Zhao, Michael Malisoff, Laurent Burlion Jan 2023

Reference Governor Design In The Presence Of Uncertain Polynomial Constraints, Rick Schieni, Chengwei Zhao, Michael Malisoff, Laurent Burlion

Faculty Publications

Reference governors are add-on schemes that are used to modify trajectories to prevent controlled dynamical systems from violating input or state constraints, and so are playing an increasingly important role in aerospace, robotic, and other applications. Here we present a novel reference governor design for systems whose polynomial constraints depend on unknown bounded parameters. This is a significant departure from earlier treatments of reference governors, where the constraints were linear or known, because here we transfer the uncertainties into the constraints instead of having them in the closed loop dynamics, which greatly simplifies the task of determining future evolution of …

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Almost Fixed Time Observers For Parameters And For State Variables Of Nonlinear Systems, Frederic Mazenc, Michael Malisoff, Laurent Burlion Jan 2023

Almost Fixed Time Observers For Parameters And For State Variables Of Nonlinear Systems, Frederic Mazenc, Michael Malisoff, Laurent Burlion

Faculty Publications

We provide new finite-time and fast-converging observers for continuous-time nonlinear systems that contain unknown constant parameters and measurement delays. When the dynamics are affine in the unmeasured state, we obtain fixed time observers that identify unknown states and unknown model parameters. When the dynamics contain a nonlinearity that depends on the unmeasured state, we instead obtain asymptotic convergence of our observers, whose rate of convergence converges to infinity as the growth rate of this nonlinearity converges to zero, so in this case we call the observers almost fixed time observers. Our examples illustrate how our assumptions can be easily checked.

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Uniqueness Of Entire Solutions To Quasilinear Equations Of P-Laplace Type, Nguyen Cong Phuc, Igor E. Verbitsky Jan 2023

Uniqueness Of Entire Solutions To Quasilinear Equations Of P-Laplace Type, Nguyen Cong Phuc, Igor E. Verbitsky

Faculty Publications

We prove the uniqueness property for a class of entire solutions to the equation (Formula presented) where σ is a nonnegative locally finite measure in Rn, absolutely continuous with respect to the p-capacity, and div A(x, ∇u) is the A-Laplace operator, under standard growth and monotonicity assumptions of order p (1 < p < ∞) on A(x, ξ) (x, ξ ∈ Rn); the model case A(x, ξ) = ξ|ξ|p−2 corresponds to the p-Laplace operator ∆p on Rn. Our main results establish uniqueness of solutions to a similar problem,(Formula presented) in the sub-natural growth case 0 < q < p − 1, where µ, σ are nonnegative locally finite measures in Rn, absolutely continuous with respect to the …

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Seepage-Induced Pore Pressure Variations Beneath An Earthen Levee Measured With A Novel Seismic Tool, Daniel Locci-Lopez, Juan M. Lorenzo Jan 2023

Seepage-Induced Pore Pressure Variations Beneath An Earthen Levee Measured With A Novel Seismic Tool, Daniel Locci-Lopez, Juan M. Lorenzo

Faculty Publications

Shear-wave seismic reflection velocity-versus-depth models can complement our understanding of seepage pore pressure variations beneath earthen levees at locations between geotechnical sites. The seasonal variations of water level in the Mississippi River create pore pressure changes in the adjacent hydraulically connected aquifer on the protected side of artificial levees. Time-lapse shear-wave velocity analysis or repetition of seismic acquisition over an area is a non-invasive method that can detect seasonal pore pressure variations in shallow (< 40 m) aquifers. The seismic reflection patterns during the seasonal pore pressure variations of the river show a distinctive change in the velocity semblance analysis, which is translated as a change in the average stress carried by the grain-to-grain contact, or simply the effective pressure. The seismic data show a greater variation of up to +140/−40 m/s or +700/−150 kPa in the confined aquifer zone, compared with the leaky confined aquifer zone of up to +46/−48 m/s or +140/−80 kPa. These relative effective pressure characteristics allow us to distinguish between confined and leaky aquifers and can be an optional approach for pressure prediction in floodplains along levees without the need to drill borings in the area to measure piezometric data.

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Climate And Atlantic Sea-Level Recorded In Southwestern Spain From 6.3 To 5.2 Ma. Inferences On The Messinian Crisis In The Mediterranean, Jean Pierre Suc, Séverine Fauquette, Sophie Warny, Gonzalo Jiménez-Moreno, Damien Do Couto Jan 2023

Climate And Atlantic Sea-Level Recorded In Southwestern Spain From 6.3 To 5.2 Ma. Inferences On The Messinian Crisis In The Mediterranean, Jean Pierre Suc, Séverine Fauquette, Sophie Warny, Gonzalo Jiménez-Moreno, Damien Do Couto

Faculty Publications

The Mio-Pliocene succession of Andalusia on the Atlantic coast (Guadalquivir Basin) is known as one of the former stratotype candidate for the Andalusian Stage, proposed during the seventies as the last stage of the Miocene. Its type section is located in Carmona, east of Seville. Our investigation includes the drilling of three cored boreholes, which provide bio- and magnetic-stratigraphic data in complement to pre-existing industrial information, and a high-resolution palynological analysis (pollen grains, spores and dinoflagellate cysts). The pollen flora and its climatic quantification provide the mean to correlate the section to the oxygen isotope curve from the Montemayor-1 borehole, …

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The Link Between Marine Thermal Discharges And Nemopilema Nomurai Blooms Around Nuclear Power Plants, Jiawei Wu, Jie Kong, Edward A. Laws, Xin Liu, Changyun Wang, Jixin Chen, Mianrun Chen, Qingzhen Yao, Yantao Wang, Yu Zhen, Chaolun Li, Bangqin Huang Jan 2023

The Link Between Marine Thermal Discharges And Nemopilema Nomurai Blooms Around Nuclear Power Plants, Jiawei Wu, Jie Kong, Edward A. Laws, Xin Liu, Changyun Wang, Jixin Chen, Mianrun Chen, Qingzhen Yao, Yantao Wang, Yu Zhen, Chaolun Li, Bangqin Huang

Faculty Publications

Recent research has shown that jellyfish blooms occur more frequently near nuclear power plants (NPPs), and a relationship between thermal discharges from the NPPs and the blooms has been hypothesized. There is, however, no direct evidence that links the thermal discharges with jellyfish blooms. In this study, we conducted 3 cruises (pre-bloom, bloom, and post-bloom) during July to September 2017 in the area surrounding the largest NPP in northern China. The water temperature near the cooling water outfall rose by 2 °C. Although we found no significant impact on phytoplankton abundance or community composition near the outfall, a broader analysis …

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Phylogenomics Of Trans-Andean Tetras Of The Genus Hyphessobrycon Durbin 1908 (Stethaprioninae: Characidae) And Colonization Patterns Of Middle America, Diego J. Elías, Caleb D. Mcmahan, Fernando Alda, Carlos García-Alzate, Pamela B. Hart, Prosanta Chakrabarty Jan 2023

Phylogenomics Of Trans-Andean Tetras Of The Genus Hyphessobrycon Durbin 1908 (Stethaprioninae: Characidae) And Colonization Patterns Of Middle America, Diego J. Elías, Caleb D. Mcmahan, Fernando Alda, Carlos García-Alzate, Pamela B. Hart, Prosanta Chakrabarty

Faculty Publications

Hyphessobrycon is one of the most species rich and widely distributed genera in the family Characidae, with more than 160 species ranging from Veracruz, Mexico to Mar Chiquita Lagoon in Buenos Aires, Argentina. The majority of Hyphessobrycon diversity shows a cis- Andean distribution; only nine species are trans-Andean including H. compressus (Meek 1908). It is well established that Hyphessobrycon is not monophyletic but it has been suggested that natural groups can be identified within the larger Hyphessobrycon species group. In this study, we tested the monophyly of trans-Andean species of Hyphessobrycon and investigated the placement of H. compressus. We inferred …

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A Finite Element Method For A Two-Dimensional Pucci Equation, Susanne C. Brenner, Li Yeng Sung, Zhiyu Tan Jan 2023

A Finite Element Method For A Two-Dimensional Pucci Equation, Susanne C. Brenner, Li Yeng Sung, Zhiyu Tan

Faculty Publications

A nonlinear least-squares finite element method for strong solutions of the Dirichlet boundary value problem of a two-dimensional Pucci equation on convex polygonal domains is investigated in this paper. We obtain a priori and a posteriori error estimates and present corroborating numerical results, where the discrete nonsmooth and nonlinear optimization problems are solved by an active set method and an alternating direction method with multipliers.

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Key Parameters Linking Cyber-Physical Trust Anchors With Embedded Internet Of Things Systems, Michele Maasberg, Leslie G. Butler, Ian Taylor Jan 2023

Key Parameters Linking Cyber-Physical Trust Anchors With Embedded Internet Of Things Systems, Michele Maasberg, Leslie G. Butler, Ian Taylor

Faculty Publications

Integration of the Internet of Things (IoT) in the automotive industry has brought benefits as well as security challenges. Significant benefits include enhanced passenger safety and more comprehensive vehicle performance diagnostics. However, current onboard and remote vehicle diagnostics do not include the ability to detect counterfeit parts. A method is needed to verify authentic parts along the automotive supply chain from manufacture through installation and to coordinate part authentication with a secure database. In this study, we develop an architecture for anti-counterfeiting in automotive supply chains. The core of the architecture consists of a cyber-physical trust anchor and authentication mechanisms …

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What Comes Next?, Neil Fulton Jan 2023

What Comes Next?, Neil Fulton

Faculty Publications

The United States stands at an important crossroads. Polarization and paralysis are the political norm. Social divisions are deep and seemingly intractable. Concerted action is disappointingly rare. Social and political pressures continue to build like tectonic plates waiting to release. What will come next? This Article begins with a description of the current situation before turning to a consideration of five possible paths forward. First, stasis. There may be more of the same with limited systemic shocks releasing small amounts of pressure without a fundamental change of circumstances. Second, rupture. Building pressure may tear the current political and social system …

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How Cost-Effective Are Electric Vehicle Subsidies In Reducing Tailpipe-Co2 Emissions? An Analysis Of Major Electric Vehicle Markets, Tamara L. Sheldon, Rubal Dua, Omar Abdullah Alharbi Jan 2023

How Cost-Effective Are Electric Vehicle Subsidies In Reducing Tailpipe-Co2 Emissions? An Analysis Of Major Electric Vehicle Markets, Tamara L. Sheldon, Rubal Dua, Omar Abdullah Alharbi

Faculty Publications

We estimate the cost-effectiveness of plug-in electric vehicle (PEV) subsidies in reducing tailpipe-CO2 emissions in China, the U.S., and nine European countries. We find that the per-tonne cost of tailpipe-CO2 avoided increases linearly with the government-subsidized percentage of the PEV price. Costs are relatively higher in the Netherlands and Denmark, which subsidized high-priced PEVs including plug-in hybrids, and lower in the U.S., where PEVs replaced higher-emissions cars. Chinese PEV subsidies have a short-run static cost of up to $1,600 per tonne, far exceeding the social cost of carbon, suggesting that subsidies are more a part of China’s industrial policy than …

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Low-Fidelity Design Optimization And Parameter Sensitivity Analysis Of Tilt-Rotor Evtol Electric Propulsion Systems, Tyler Critchfield, Andrew Ning Jan 2023

Low-Fidelity Design Optimization And Parameter Sensitivity Analysis Of Tilt-Rotor Evtol Electric Propulsion Systems, Tyler Critchfield, Andrew Ning

Faculty Publications

Urban air mobility requires a multidisciplinary approach to tackle the important chal- lenges facing the design of these aircraft. This work uses low-to-mid fidelity tools to model rotor aerodynamics, blade structures, vehicle aerodynamics, and electric propulsion for a tilt-rotor electric vertical takeoff and landing (eVTOL) aircraft. We use gradient-based design optimization and extensive parameter sensitivity analysis to explore the design space and complex tradeoffs of tilt-rotor distributed electric propulsion systems.

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Isogeometric Boundary-Conforming Body-In-White Crash Model Construction, Analysis, And Comparison With Fem Model, Kendrick M. Shepherd Jan 2023

Isogeometric Boundary-Conforming Body-In-White Crash Model Construction, Analysis, And Comparison With Fem Model, Kendrick M. Shepherd

Faculty Publications

In this paper, we discuss model generation to rebuild the body-in-white of a 1996 Dodge Neon finite element model into a isogeometric conforming analysis-suitable crash model. We then perform the first known boundary-fit isogeometric body-in-white crash analysis of the vehicle and compare results achieved by traditional finite element methods. Results indicate the value and potential of high-order meshes in analysis.

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Anyone Can Make A Religious Object: Undoing Spirituality And Contemporary Art, Mark Graham, Clark Goldsberry, Isaac Calvert Jan 2023

Anyone Can Make A Religious Object: Undoing Spirituality And Contemporary Art, Mark Graham, Clark Goldsberry, Isaac Calvert

Faculty Publications

The spiritual dimensions of art and education have been explored for their potential to offer different ways of understanding or representing knowledge and their potential to inspire transcendence or cultivate wholeness. This article examines connections between transcendent or sacred territories of human existence, teaching, and contemporary art. Experiences of walking in the Himalayan mountains with Tibetan Buddhist monks, conversing with rabbis in Jerusalem, and teaching in state school classrooms are used to illustrate connections between education, spirituality, religion, and contemporary art. We seek to understand how the spiritual dimensions of education and contemporary art could be understood through the lenses …

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Land Prices And The Development Process, Henry J. Munneke, C. F. Sirmans, Barrett Slade Jan 2023

Land Prices And The Development Process, Henry J. Munneke, C. F. Sirmans, Barrett Slade

Faculty Publications

As lot area increases, it is commonly believed that land prices will increase at a nonconstant rate. In the case where the land price-area curve increases at a decreasing rate with respect to parcel area, it is believed the cost of subdividing land is the driving factor behind the concavity. This paper uses a unique data set to explore how the area elasticity of price changes over the development cycle as land moves from raw land to finished lots. The results show the area elasticity of price increases as parcels of land move through the phases of development. The results …

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