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Distributionally Robust Optimization Through The Lens Of Submodularity, Karthik Natarajan, Divya Padmanabhan, Arjun Ramachandra

Working Papers

Distributionally robust optimization is used to solve decision making problems under adversarial uncertainty where the distribution of the uncertainty is itself ambiguous. In this paper, we identify a class of these instances that is solvable in polynomial time by viewing it through the lens of sub modularity. We show that the sharpest upper bound on the expectation of the maximum of affine functions of a random vector is computable in polynomial time if each random variable is discrete with finite support and upper bounds (respectively lower bounds) on the expected values of a finite set of submodular (respectively supermodular) functions …

Changes In Physico-Chemical Properties Of A Sandy Loam Soil Depending On The Particle Size Of Hazelnut Shell-Derived Biochar, Damla Bender Özenç, Ceyhan Tarakçioğlu, Funda Irmak Yilmaz, Selahattin AygüN

The Philippine Agricultural Scientist

This study evaluated the effects of hazelnut shell-derived biochar particle sizes on the soil’s physical and chemical properties, and on various nutrient contents present in the sandy loamy soils. For this purpose, an incubation experiment in the plastic high tunnel has been performed under sixteen treatments (control-only soil), and at four incubation times (30, 60, 90, and 120 d), by using three different biochar sizes (≤ 1, 1 - 2, and 2 - 4 mm). The addition of 1 - 2 and 2 - 4 mm biochar during the incubation time decreased the bulk density in the soil by 26%. …

The Effect Of Amf-Cacao Association On Varying Physicochemical, Nutrient, And Biological Soil Parameters In An Agroforest System, Diana P. Paguntalan, Nelly S. Aggangan, Inocencio E. Buot Jr.

The Philippine Agricultural Scientist

The increasing interest in sustainable methods in agroforestry directs the attention of many to arbuscular mycorrhizal fungi (AMF) for their role in maintaining or improving overall plant health and nutrition of many plants including cacao (Theobroma cacao L.) trees. The effects of different treatments of AMF and other soil amendments applied singly or in combination on physicochemical properties, nutrient levels, spore count, and rhizosphere microbial counts, were investigated and compared across different sampling periods of varying climatological conditions in an agroforest system. Results showed that there was a significant effect on the N content using the different treatments. The …

The Comprehensive Archive Of Substellar And Planetary Accretion Rates, S. K. Betti, K. B. Follette, K. Ward-Duong, A. E. Peck, Y. Aoyama, J. Bary, B. Dacus, S. Edwards, G. D. Marleau, K. Mohamed, J. Palmo, C. Plunkett, C. Robinson, H. Wang

Astronomy: Faculty Publications

Accretion rates ( M ̇ ) of young stars show a strong correlation with object mass (M); however, extension of the M ̇ - M relation into the substellar regime is less certain. Here, we present the Comprehensive Archive of Substellar and Planetary Accretion Rates (CASPAR), the largest compilation to date of substellar accretion diagnostics. CASPAR includes: 658 stars, 130 brown dwarfs, and 10 bound planetary mass companions. In this work, we investigate the contribution of methodological systematics to scatter in the M ̇ - M relation and compare brown dwarfs to stars. In our analysis, we rederive all quantities …

First Vlti/Gravity Observations Of Hip 65426 B: Evidence For A Low Or Moderate Orbital Eccentricity, Sarah Blunt, W. O. Balmer, J. J. Wang, S. Lacour, S. Petrus, G. Bourdarot, J. Kammerer, N. Pourré, E. Rickman, J. Shangguan, T. Winterhalder, R. Abuter, A. Amorim, R. Asensio-Torres, M. Benisty, J. P. Berger, H. Beust, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, A. Chavez, E. Choquet, V. Christiaens, Y. Clénet, Et Al, Kimberly Ward-Duong

Astronomy: Faculty Publications

Giant exoplanets have been directly imaged over orders of magnitude of orbital separations, prompting theoretical and observational investigations of their formation pathways. In this paper, we present new VLTI/GRAVITY astrometric data of HIP 65426 b, a cold, giant exoplanet which is a particular challenge for most formation theories at a projected separation of 92 au from its primary. Leveraging GRAVITY’s astrometric precision, we present an updated eccentricity posterior that disfavors large eccentricities. The eccentricity posterior is still prior dependent, and we extensively interpret and discuss the limits of the posterior constraints presented here. We also perform updated spectral comparisons with …

Who's Afraid Of Being Woke? – Critical Theory As Awakening To Erascism And Other Injustices, Berta E. Hernández-Truyol

UF Law Faculty Publications

This Essay critically analyzes the “anti-woke” message deployed by the Conservative Political Action Conference’s (CPAC) 2023 annual meeting’s poster—the suggestion that awake is good and its synonym woke is bad—with the goal of establishing the importance of CRT in general and in education more specifically. This work shows how critical theories are key to deconstructing disingenuous messaging about the meaning of words, theoretical constructs, and historical realities.

The Work first elucidates that the meaning of awake, as utilized in myriad fields, addresses the concept of consciousness—awareness of injustices in society. Second, the Essay historicizes the origins and uses of the …

Co2 Storage Capacity And Injectivity Of Stacked Carbonates Of The Pennsylvanian And Permian In Western Nebraska, Lateef Lawal

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Geological carbon storage (GCS) is a critical aspect of carbon capture and storage (CCS) in which captured CO₂ from power plants and industrial processes is injected and stored securely underground. Potential subsurface rock formations include saline aquifers, depleted oil and gas reservoirs, unmineable coal seams and volcanic rocks. GCS technology has been proven in the United States and many other parts of the world as a net-zero carbon emission strategy to mitigate the current climate crisis of our planet. Unlike other states such as Wyoming, GCS projects are still in the early phases in Nebraska. The goal of this …

Embedding The Scientists: Civic Issues As Context For Teaching And Learning, Heather Lettner-Rust, Alix Dowling Kink, Edward Kinman, Joellen Pederson, Phillip Poplin

The Journal of the Assembly for Expanded Perspectives on Learning

We teach science as a path to meaningful civic engagement in a participatory democracy and as a path that should be open to all; our concern lies in how the next generation of young citizens1 address challenging civic issues both by applying science to other contexts—public and civic—as well as communicating science to others—peers and the public. To that end, our article seeks to explain an interdisciplinary capstone course for our general education program that we developed to promote and support science learning and science communication by teaching in the context of important civic issues.

Coastal Communications: Teaching Civic Scientific Literacy In English And Environmental Science And Resource Management Classes, Stacey Anderson, Kiki Patsch

The Journal of the Assembly for Expanded Perspectives on Learning

Named after the national park that lies just off of our Ventura County shores, California State University Channel Islands draws faculty who are committed to integrating the coast into their teaching and research. This context has inspired our interdisciplinary collaboration as teacher-scholars who hail from separate departments (English and Environmental Science and Resource Management). Our work together is designed to amplify civic scientific literacy in our classrooms as a means of elevating discourse on the growing challenges that threaten our coastal communities.

Contributors To Jaepl, Vol. 28, Wendy Ryden

The Journal of the Assembly for Expanded Perspectives on Learning

List of contributors and biographies for JAEPL, Volume 28.

Stream Restoration Effectiveness In Mullins Creek In Fayetteville, Arkansas, Amadeo Scott

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Lotic waterways are vital for habitat, food, water, and flood protection, but urbanization poses a major threat to their integrity. Runoff from urban surfaces leads to pollution, flashiness, loss of biodiversity, and other symptoms, also known as Urban Stream Syndrome (USS). To combat USS, streams can be restored, but most restorations are not monitored so their long-term effectiveness is unknown. This study quantitatively evaluated a decade-old stream restoration in Fayetteville, Arkansas, to assess its effectiveness in combating USS and achieving set restoration goals, and to gain insights for future restoration projects. Restoration goals included decreasing erosion and sedimentation, increasing pool …

Energy Extraction, Or Lack Thereof, Nishanth Gudapati

Mathematics

The problem of stability of rotating black holes is the subject of a long standing research program since the 1960s and remains an unresolved problem in general relativity. A major obstacle in the black hole stability problem is that the energy of waves propagating through rotating black holes spacetimes is not necessarily positive-definite, due to the so called ergo-region. This is a serious complication that limits the efficacy of most mathematical techniques. In this expository article, we report that, despite the ergo-region, there exists a positive-definite total energy for axisymmetric Maxwell, gravitational and electrovacuum perturbations of Kerr and Kerr–Newman black …

Applications Of Diels-Alder Cycloadditions And Transition Metals As Catalysts To Recent Total Syntheses, Alexander H.C. Evans

Legacy Theses & Dissertations (2009 - 2024)

This thesis examines the recent advances in the applications of Diels-Alder cycloaddition reaction and Suzuki-Miyaura coupling to total syntheses of antibiotic and anti-cancer drugs. Attention is also given to intramolecular Diels-Alder cycloadditions and the use of Kinetic vs. Thermodynamic conditions. The results of the Diels-Alder cycloadditions that are discussed oftentimes result in high stereospecificity, regioselectivity, and stereoselectivity. The applications of Suzuki-Miyaura coupling and transition metal catalysts to total syntheses problems are also discussed along a similar narrative. Attention is given specifically to the use of several different gold catalysts as well as Grubb’s Catalyst. The use of the Diels-Alder cycloaddition …

Enhanced Market Timing: Long Short-Term Memory Neural Network For Optimal Entry And Exit In Stock Market, Jerome Chinua Hall

Legacy Theses & Dissertations (2009 - 2024)

This thesis investigates applying a Long Short-Term Memory (LSTM) Neural Network for forecasting optimal times to enter and exit the stock market. Given the inherent imbalance in the dataset, where most days are not opportune for market actions, and the challenge of predicting such infrequent occurrences, we will employ a five-day window before and after the identified optimal market entry or exit time. A prediction is considered correct if it is within this five-day interval. The model was trained on historical S&P 500 data, using features such as exponential and simple moving averages of the closing price, the ten-day percentage …

Solubility, Reactivity And Diffusion In Polymeric Bilayer Thin Films, Jacob Sitterly

Legacy Theses & Dissertations (2009 - 2024)

Microelectronics manufacturing of modern devices has required the use of polymer photoresists in several essential steps. The traditional limitation in device capability has been dependent on the minimum feature size attainable by the wavelength of light and materials used in photolithography. In this thesis the study of polymer thin films in single and bilayer stacks is described. Three scientific concepts are fundamental to this study: (1) the diffusion and (2) reaction of acid and small molecules that change polymer (3) solubility. In this thesis, two chemical systems are designed and used to study these three scientific concepts.

The Effects Of Aggregation Of Tetrafluoro(Trifluoromethyl-Λ6-Sulfanyl) Ethanes On The Secondary Structure Stabilization Of Melittin: A Molecular Dynamics Simulation Study, Samadrita Biswas

Legacy Theses & Dissertations (2009 - 2024)

Introduction of novel tetrafluoro(trifluoromethyl-λ6-sulfanyl) (CF3SF4) functional group has garnered substantial interest because of its increased hydrophobicity. This super fluorinated group attributed to increased lipophilicity, decreased heat of vaporization, and lowered dielectric constants. The highly electronegative nature of this group can profoundly influence the reactivity of compounds containing the CF3SF4 moiety. The hypervalency associated with this new group presents an exciting platform to explore the fundamental understanding of molecular interactions, reactivity patterns, and electronic behaviors. This dissertation investigates the molecular properties and behaviors of tetrafluoro(trifluoromethyl-λ6-sulfanyl) ethanes (CF3SF4-ethanes), with a specific emphasis on 2-tetrafluoro(trifluoromethyl)-λ6-sulfanylethan-1-ol (CF3SF4-ethanol) and 2-tetrafluoro(trifluoromethyl)-λ6-sulfanylethanamine (CF3SF4-ethanamine). Utilizing ab initio calculations …

An Investigation Into Past And Future Freezing Level Height And Equilibrium Line Altitude In The Tropical Andes Using Cmip6, Shelby Turner

Legacy Theses & Dissertations (2009 - 2024)

The freezing level height (FLH) in the tropical Andes has increased over the past several decades, as is evident with the receding of alpine glaciers in this region. The accuracy of Global Climate Models (GCMs)—specifically previous generations of the Coupled Model Intercomparison Project (CMIP)—in this region remains an issue, as the complex terrain and climate characteristics are difficult to simulate realistically. The changes seen in these tropical alpine glaciers in the past few decades are a clear indicator of the effects climate change is having in this tropical mountain region, making it important to better understand current and projected future …

Photosensitized Chemically Amplified Resist (Pscar) For Extreme Ultraviolet Lithography (Euvl), Israt Hossain

Legacy Theses & Dissertations (2009 - 2024)

As Deep Ultraviolet (DUV) Photolithography has hit the limit in further shrinking semiconductor devices' critical dimension (CD) down to below 10 nm, using Extreme Ultraviolet (EUV) 13.5 nm wavelength is under intense development. EUV has higher resolution (R) as a consequence of the shorter wavelength, but EUV sources have much lower light intensity than DUV light sources, leading to sensitivity challenges. While light source intensity and photoresist sensitivity (S) have a complementary relationship, and high intensity EUV light source development only progresses slowly, this paper discusses other novel approaches to improve photoresist sensitivity with low intensity EUV light. Photosensitization chemistry …

Characterizing And Understanding Orographic Precipitation Over The Mountains Of Extratropical South America, Yazmina Rojas Beltran

Legacy Theses & Dissertations (2009 - 2024)

Extratropical South-America (30-40°S) varies significantly in topography, including a coastal mountain range with elevation from 700-1300 m, a central valley, and the Andes, with elevation from 1000-2500 m on the western side of the continent. The topography of the area can disrupt frontal systems approaching from the Pacific Ocean, leading to enhanced orographic precipitation over the windward slope of the Andes and a sharp rain shadow, with less precipitation in the leeside. These phenomena are also observed over the coastal mountains of south-central Chile. The main goals of this study are to characterize and understand orographic precipitation and rain shadow …

Planar, Twisted, And Macrocyclic Polyarenes: Structures, Reduction Limits, And Reactivity, Matthew John Pennachio

Legacy Theses & Dissertations (2009 - 2024)

Molecular nanocarbons, which can be considered as fragments of fullerenes, carbon nanotubes, or graphene have invigorated the rapid development of carbon chemistry at the nanoscale in recent decades. Not only do molecular nanocarbons possess extraordinary chemical and physical properties, but they also exhibit such unique features as controllable and scalable molecular compositions, atomically uniform precision, and good stability. The advance of nanocarbon chemistry give rise to unique applications such as electron transfer, semiconductors, superconductors, and lithium-ion batteries. However, an in-depth understanding of controlled doping, charge transfer effects, and structure–property correlations has been limited in nanocarbon chemistry due to the lack …

Mrs. Dalloway As A Window For Understanding Life, Kristen Venegas

English (MA) Theses

Virginia Woolf’s Mrs. Dalloway may be dismissed as fiction, and fiction consequently is dismissed as fantasy. However, the novel enables readers to practice an intellectual exercise of meta-awareness that extends beyond the pages and onto real world phenomena. Under a cognitive neuroscience perspective, Mrs. Dalloway is a literary masterpiece due to its hyper- realistic execution of the intimacies of life. Through the narrative style of free-indirect discourse, Woolf illustrates what occurs in the minds of characters as they develop their own perceptions of reality and identity, exposes the fear and inadequacies of mankind’s distress in times of chaos and disorder …

Factors Influencing The Delivery Of Preconception Care Services Among Nursing And Midwifery Students At Aga Khan University, Kenya, Levy Mukolwe

MSc in Advanced Practice Midwifery

Preconception care (PCC) encompasses a range of biomedical, behavioural, and social interventions to improve pregnancy outcomes. However, the effective implementation of PCC services, particularly in developing countries, faces multifaceted challenges. This cross-sectional quantitative descriptive study was conducted among 104 nursing and midwifery students at Aga Khan University and selected through simple random sampling. Data was collected using semi-structured self-administered questionnaires and analyzed using SPSS version 25.0. 69.9% of the respondents were nurses, while 30.1% were midwives. 28.8% of participants knew the definition of PCC. The importance of various PCC components, such as nutritional deficiency screening, genetic risk assessment, environmental hazard …

Brain Dance And Brain Power: Impact Of Movement On Problem-Solving Skills For Exceptional Learners, Kristin Crain

Master's Theses

The goal of this research was to answer the question: Q1 In what ways do Brain Dance type movements impact problem-solving skills for exceptional learners? The research was completed within the public education setting with a group of volunteer participants including one cooperating teacher and six student participants identified as exceptional learners. The researcher focused on problem-solving skills including identifying a problem, showing work, implementing a solution, and identifying a solution. Research instruments were created based on these skills including a pretest, posttest, and teacher rubric. Student participants completed the pretest prior to being introduced to movement exercises. The researcher …

Leveraging Generative Agents: Autonomous Ai With Simulated Personas For Interactive Simulacra And Collaborative Research, James Hutson, Jay Ratican

Faculty Scholarship

The advent of large language models (LLMs) and AI learning have fundamentally reshaped the research landscape, paving the way for novel problem-solving approaches. This paper introduces a unique framework that leverages the capabilities of autonomous AI agents with simulated personas to drive collaborative research in groundbreaking ways. Inspired by a recent study of autonomous agents mirroring human behavior, this concept encourages the use of a cadre of AI agents, each possessing specialized expertise for collective endeavors. By replicating human diversity in teamwork, this approach targets complex and hitherto unsolvable issues. The key to this strategy is persona and emotional simulation, …

Leading With Shared Values: Developing A Charter Of Principles For Philanthropic Partnerships, Cheryl A. Maurana, John R. Raymond, Christopher Stawski, Joseph E. Kerschner, James C. Rahn

The Foundation Review

The rise of greater individuality in giving — in diversity of beliefs and donor preferences — has resulted in a need to ensure alignment of values and expectations between those entering into funding relationships, and therefore a need to return to giving that recognizes the importance of conditions and considerations that undergird the partnership between the philanthropic organization and awardee.

The Kern Family Foundation’s nearly $88 million investment in the Medical College of Wisconsin represents one example where creating a charter was pivotal to a partnership’s effectiveness. Their charter describes a commitment to shared values, including character, caring, and practical …

The Surface Atmosphere Integrated Field Laboratory (Sail) Campaign, D. R. Feldman, A. C. Aiken, W. R. Boos, R. W. H. Carroll, V. Chandrasekar, S. Collis, J. M. Creamean, G. De Boer, J. Deems, P. J. Demott, J. Fan, A. N. Flores, D. Gochis, M. Grover, T. C. J. Hill, A. Hodshire, E. Hulm, C. C. Hume, R. Jackson, F. Junyent, A. Kennedy, M. Kumjian, E. J. T. Levin, J. D. Lundquist, J. O'Brien, M. S. Raleigh, J. Reithel, A. Rhoades, K. Rittger, W. Rudisill, Z. Sherman, E. Siirila-Woodburn, S. M. Skiles, J. N. Smith, R. C. Sullivan, A. Theisen, M. Tuftedal, A. C. Varble, A. Wiedlea, S. Wielandt, K. Williams, Z. Xu

Geosciences Faculty Publications and Presentations

The science of mountainous hydrology spans the atmosphere through the bedrock and inherently crosses physical and disciplinary boundaries: land–atmosphere interactions in complex terrain enhance clouds and precipitation, while watersheds retain and release water over a large range of spatial and temporal scales. Limited observations in complex terrain challenge efforts to improve predictive models of the hydrology in the face of rapid changes. The Upper Colorado River exemplifies these challenges, especially with ongoing mismatches between precipitation, snowpack, and discharge. Consequently, the U.S. Department of Energy’s (DOE) Atmospheric Radiation Measurement (ARM) user facility has deployed an observatory to the East River Watershed …

The Influence Of Subhaloes On Host Halo Properties, Lorena Mezini, Catherine E. Fielder, Andrew R. Zentner, Yao-Yuan Mao, Kuan Wang, Hao-Yi Wu

Physics Faculty Publications and Presentations

Within the ΛCDM cosmology, dark matter haloes are composed of both a smooth component and a population of smaller gravitationally bound subhaloes. These components are often treated as a single halo when properties, such as density profiles, are extracted from simulations. Recent work has shown that density profiles change substantially when subhalo mass is excluded. In this paper, we expand on this result by analysing three specific host halo properties – concentration (c_NFW), spin (λ_B), and shape (c/a) – when calculated only from the smooth component of the halo. This analysis …

Nchc Bibliography Of Journals And Monographs (December 1, 2023), National Collegiate Honors Council

National Collegiate Honors Council Monographs

National Collegiate Honors Council (NCHC) Bibliography of Journals and Monographs (1 December 2023), 108 pages, alphabetical by author.

African Bovid Tribe Classification Using Transfer Learning And Computer Vision, Manuel Domínguez-Rodrigo, Juliet Brophy, Gregory J. Mathews, Marcos Pizarro-Monzo, Enrique Baquedano

Faculty Publications

Objective analytical identification methods are still a minority in the praxis of paleobiological sciences. Subjective interpretation of fossils and their modifications remains a nonreplicable expert endeavor. Identification of African bovids is a crucial element in the reconstruction of paleo-landscapes, ungulate paleoecology, and, eventually, hominin adaptation and ecosystemic reconstruction. Recent analytical efforts drawing on Fourier functional analysis and discrimination methods applied to occlusal surfaces of teeth have provided a highly accurate framework to correctly classify African bovid tribes and taxa. Artificial intelligence tools, like computer vision, have also shown their potential to be objectively more accurate in the identification of taphonomic …

Stress-Sensing In Flexible Epoxy Adhesives, Christine Rukeyser

Honors Theses

In mechanochemistry, mechanical force causes a chemical change using small molecules, called mechanophores, by covalently connecting them into polymer materials. Stress-sensing mechanophores give a visual signal of mechanical force on the molecular level within a material. To our knowledge, stress-sensing mechanophores have never been incorporated into a commercially available epoxy kit. In this work, the characterization of two 3MTM Scotch-Weld TM Epoxy Adhesive kits: DP100 Plus Clear and DP190 Translucent have been completed through FT-IR Spectroscopy. The addition of the mechanophore spiropyran to the 3M kits will be discussed; as well as preparation and characterization of three dimerized anthracene derivatives. …