Physical Sciences and Mathematics Commons^™

Front Matter

Journal of Humanistic Mathematics

No abstract provided.

Seeing Mathematics In The World, Mark Huber, Gizem Karaali

Journal of Humanistic Mathematics

No abstract provided.

The Challenges For Alfalfa Hay Marketing In China, Z. M. Yang

IGC Proceedings (1993-2023)

No abstract provided.

Stimulating Market Led Livestock Production Through Information Communication Technologies: Experiences From Pastoral Areas Of Eastern Africa, R. Kaitho, G. Kariuki, E. Kebebe, J. Gutta, J. Ndungu, M. Kingamkono, P. Dyke

IGC Proceedings (1993-2023)

No abstract provided.

Seed Performance Of Three Interespecific Hybrids Of Elephant Grass × Pearl Millet Under Controlled Deterioration, M. Pozitano, R. Usberti

IGC Proceedings (1993-2023)

No abstract provided.

Marketing Of Seeds Of Stylosanthes — A Tropical Legume In India, Nagaratna Biradar, K. Sridhar, C. R. Ramesh

IGC Proceedings (1993-2023)

No abstract provided.

210po And 210pb As Tracers Of Particle Cycling And Export In The Western Arctic Ocean, Wokil Bam, Kanchan Maiti

Environmental Science and Geology Faculty Research Publications

The distribution and vertical fluxes of particulate organic carbon and other key elements in the Arctic Ocean are primarily governed by the spatial and seasonal changes in primary productivity, areal extent of ice cover, and lateral exchange between the shelves and interior basins. The Arctic Ocean has undergone rapid increase in primary productivity and drastic decrease in the areal extent of seasonal sea ice in the last two decades. These changes can greatly influence the biological pump as well as associated carbon export and key element fluxes. Here, we report the export of particulate organic and inorganic carbon, particulate nitrogen …

Group Actions On Hyperspaces, Manpreet Singh

Math Theses

In this thesis, we will look at the structure of two spaces associated with a topological space X, C(X) and P(X). Furthermore, from the group action of a topological group G on X, we get the induced group action of G on C(X) and P(X). We will also look at few properties for actions of G on a compact Hausdorff space X: proximality, strong proximality and extreme proximality followed by the main result to give parallel characterizations of proximality and extreme proximality.

Predictors Of Chronic Opioid Therapy In Medicaid Beneficiaries With Hiv Who Initiated Antiretroviral Therapy, Gyeon Oh, Emily S. Brouwer, Erin L. Abner, David W. Fardo, Patricia R. Freeman, Chris Delcher, Daniela C. Moga

Epidemiology and Environmental Health Faculty Publications

The factors associated with chronic opioid therapy (COT) in patients with HIV is understudied. Using Medicaid data (2002-2009), this retrospective cohort study examines COT in beneficiaries with HIV who initiated standard combination anti-retroviral therapy (cART). We used generalized estimating equations on logistic regression models with backward selection to identify significant predictors of COT initiation. COT was initiated among 1014 out of 9615 beneficiaries with HIV (male: 10.4%; female: 10.7%). Those with older age, any malignancy, Hepatitis C infection, back pain, arthritis, neuropathy pain, substance use disorder, polypharmacy, (use of) benzodiazepines, gabapentinoids, antidepressants, and prior opioid therapies were positively associated with …

Spatiotemporal Trends In Bacterial Diversity Across Three Watersheds Within The Platte River Basin, Nebraska, Esther Perisho

School of Natural Resources: Dissertations, Theses, and Student Research

River bacteria are understudied despite being critical components of river ecosystems. There are even fewer studies considering bacteria communities at large spatiotemporal scales, which may provide insight into drivers of community assembly. We investigated differences in bacterial diversity across environmental gradients within three sub-basins nested in the Platte River Basin, Nebraska. Surface water samples were collected weekly at 36 sites from May to September by the Nebraska Department of Environment and Energy (NDEE) in 2019. Bacterial communities were sequenced using the Illumina MiSeq platform. Sub-basins had similar counts of unique amplicon sequence variants (ASVs) but different community structures. These structural …

Site Selection For Coral Reef Restoration Using Airborne Imaging Spectroscopy, Steven R. Schill, Gregory P. Asner, Valerie Pietsch Mcnulty, F. Joseph Pollock, Aldo Croquer, Nicholas R. Vaughn, Ximena Escovar-Fadul, George Raber, Elizabeth Shaver

Faculty Publications

Over the past decade, coral restoration efforts have increased as reefs continue to decline at unprecedented rates. Identifying suitable coral outplanting locations to maximize coral survival continues to be one of the biggest challenges for restoration practitioners. Here, we demonstrate methods of using derivatives from imaging spectroscopy from the Global Airborne Observatory (GAO) to identify suitable coral outplant sites and report on the survival rates of restored coral at those sites. Outplant sites for a community-based, citizen science outplant event in Bávaro, Dominican Republic, were identified using expert-defined criteria applied to a suitability model from data layers derived from airborne …

Spatial And Long-Term Temporal Changes In Water Quality Dynamics Of The Tonle Sap Ecosystem, Savoeurn Soum, Peng Bun Ngor, Thomas E. Dilts, Sapana Lohani, Suzanne Kelson, Sarah E. Null, Flavia Tramboni, Zeb S. Hogan, Bunyeth Chan, Sudeep Chandra

Watershed Sciences Faculty Publications

Tonle Sap lake-river floodplain ecosystem (TSE) is one of the world’s most productive freshwater systems. Changes in hydrology, climate, population density, and land use influence water quality in this system. We investigated long term water quality dynamics (22 years) in space and time and identified potential changes in nutrient limitation based on nutrient ratios of inorganic nitrogen and phosphorus. Water quality was assessed at five sites highlighting the dynamics in wet and dry seasons. Predictors of water quality included watershed land use, climate, population, and water level. Most water quality parameters varied across TSE, except pH and nitrate that remained …

The Is Social Continuance Model: Using Conversational Agents To Support Co-Creation, Naif Alawi

USF Tampa Graduate Theses and Dissertations

With the rise of Agentic IS Artifact and the increasing integration of this technology within organizations, our understanding of the impact of this technology on individuals remains limited. Although IS use literature provides important guidance for organization to increase employees’ willingness to work with new technology implementations, the utilitarian view of prior IS use limits its application in light of the new evolving social interaction between humans and Agentic IS Artifacts. To that end, we contribute to the IS use literature by implementing a social view to understand the impact of Agentic IS Artifacts on an individual’s perception and behavior. …

Boolean Logic Algebra Driven Similarity Measure For Text Based Applications, Hassan I. Abdalla, Ali A. Amer

All Works

In Information Retrieval (IR), Data Mining (DM), and Machine Learning (ML), similarity measures have been widely used for text clustering and classification. The similarity measure is the cornerstone upon which the performance of most DM and ML algorithms is completely dependent. Thus, till now, the endeavor in literature for an effective and efficient similarity measure is still immature. Some recently-proposed similarity measures were effective, but have a complex design and suffer from inefficiencies. This work, therefore, develops an effective and efficient similarity measure of a simplistic design for text-based applications. The measure developed in this work is driven by Boolean …

Final 2021 Residential Metals Abatement Program (Rmap) School Soil Sampling Field Sampling Plan (Fsp) Submittal #5 [Covering Mcglone Heights And Skating Rink], Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

2-Phosphinoimidazole Derived Monometallic And Bimetallic Catalysts, Erin Martinez

Theses and Dissertations

Transition metal catalysis is a necessary branch of organic synthesis. Both monometallic and bimetallic catalysts can reduce reaction times, improve regio- and enantioselectivity, and minimize byproducts. Additionally, bimetallic catalysts can cooperatively activate substrates, which can enable new reactions and mechanistic pathways. The first half of this work will describe the synthesis and catalytic ability of our novel Pd(I) and Pd(II) dimers. Both dimers use a 2-phosphinoimidazole ligand scaffold to bring the metal centers in close proximity. The Pd(II) dimer can catalyze the synthesis of 1,3-disubstituted naphthalene rings from commercially available aryl iodides and methyl ketones with high regioselectivity and yields. …

Invariant Lattices Of Several Elliptic K3 Surfaces, Joshua Joseph Fullwood

Theses and Dissertations

This work is concerned with computing the invariant lattices of purely non-symplectic automorphisms of special elliptic K3 surfaces. Brandhorst gave a collection of K3 surfaces admitting purely non-symplectic automorphisms that are uniquely determined up to isomorphism by certain invariants. For many of these surfaces, the automorphism is also unique or the automorphism group of the surface is finite and with a nice isomorphism class. Understanding the invariant lattices of these automorphisms and surfaces is interesting because of these uniqueness properties and because it is possible to give explicit generators for the Picard and invariant lattices. We use the methods given …

Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Pioneer Technical Services, Inc.

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

An Economic Assessment Of Cattle Raising Enterprises In The Red Soils Region Of China, Neil D. Macleod, Shilin Wen

IGC Proceedings (1993-2023)

No abstract provided.

Market Trends For Organic Or Low Input Foods From Marginal Pastures, F. Longhi, Andrea Pardini

IGC Proceedings (1993-2023)

No abstract provided.

Comparison Of Production And Cost Between Conventional And Organic Forage Crops, Jong-Duk Kim, C. H. Kwon, S. H. Chae, C. H. Kim

IGC Proceedings (1993-2023)

No abstract provided.

Right Side Up: Payment For Ecosystem Services On Privately Owned Grasslands In Nebraska, Kyle Martens

School of Natural Resources: Dissertations, Theses, and Student Research

Grasslands are an important ecological and economic resource in the United States. As part of a natural system, these landscapes can provide income for ranching operations and employment in rural communities; habitat for grassland plants, animals, and migratory species; and offer other services not always readily observed such as improved soil health, clean water, and carbon sequestration. Despite the overarching benefits, the conversion of grasslands to other uses remains widespread throughout much of the remaining Great Plains ecosystem.

Shifting from livestock ranching to another land use often reflects a tipping point. This occurs when the alternative land use is perceived …

Biomaterials With Structural Hierarchy And Controlled 3d Nanotopography Guide Endogenous Bone Regeneration, Shixuan Chen, Hongjun Wang, Valerio Luca Mainardi, Giuseppe Talò, Alec Mccarthy, Johnson V. John, Matthew J. Teusink, Liu Hong, Jingwei Xie

Chemistry Department: Faculty Publications

Biomaterials without exogenous cells or therapeutic agents often fail to achieve rapid endogenous bone regeneration with high quality. Here, we reported a class of three-dimensional (3D) nanofiber scaffolds with hierarchical structure and controlled alignment for effective endogenous cranial bone regeneration. 3D scaffolds consisting of radially aligned nanofibers guided and promoted the migration of bone marrow stem cells from the surrounding region to the center in vitro. These scaffolds showed the highest new bone volume, surface coverage, and mineral density among the tested groups in vivo. The regenerated bone exhibited a radially aligned fashion, closely recapitulating the scaffold’s architecture. The organic …

Pt-Containing Conjugated Polymers And Small Molecules For Bhj Photovoltaic Devices, Yunjeong Kwon

Chemistry and Chemical Biology ETDs

The current state of organic photovoltaic (OPV) devices involve series of small molecular or polymeric systems that can absorb light from the solar spectrum in concert with another material that acts as an acceptor material. Together these materials serve to generate and split bound excitation species then transport the separate charges to their respected electrode. Several limitations have restricted the widescale use of these materials. Since these devices have their genesis in organic materials the OPV devices inherit short exitonic lifetimes, narrow absorption window and a lack of precise control over the morphology. To overcome these limitations, additional molecular engineering …

Fully Coupled Internal Radiative Heat Transfer For The 3d Material Response Of Heat Shield, Raghava S. C. Davuluri, Rui Fu, Kaveh A. Tagavi, Alexandre Martin

Mechanical Engineering Faculty Publications

The radiative transfer equation (RTE) is strongly coupled to the material response code KATS. A P-1 approximation model of RTE is used to account for radiation heat transfer within the material. First, the verification of the RTE model is performed by comparing the numerical and analytical solutions. Next, the coupling scheme is validated by comparing the temperature profiles of pure conduction and conduction coupled with radiative emission. The validation study is conducted on Marschall et al. cases (radiant heating, arc-jet heating, and space shuttle entry), 3D Block, 2D IsoQ sample, and Stardust Return Capsule. The validation results agree well for …

A Comparison Study Among The High School Students In The Us: Obesity And Overweight Rates Among Racial Minorities—Stress, Dietary Behavior, Sports And Physical Activity Participation, Animesh Dali '24, Naima Shifa

Student Research

Background: The Youth Risk Behavior Surveillance System (YRBSS) collects data on American youth primarily for assessing various health risk factors. This study aims to examine the relationship between demographic, and behavioral variables that we have considered as risk factors and obesity in American youth in 2015 and 2019.

Methods: Data pertaining to obesity risk factors and BMI measurements were obtained from the YRBSS. Cross Tables and linear regression models were constructed and subsequent analyses were used to examine the correlation between risk factors and BMI. Two-sample t-tests were used to explore the difference between the 2015 and 2019 datasets.

Results: …

Assessing The Impact Of Organic Versus Conventional Agricultural Management On Soil Hydraulic Properties In A Long-Term Experiment, Abdelrahman Alfahham, Matthew T. Amato, Emmanuel Omondi, Daniel Giménez, Alain F. Plante

Agricultural and Environmental Sciences Faculty Research

Investigating the effects of various agricultural management systems on soil hydraulic properties in long-term field experiments allows farmers to evaluate their efficacy in mitigating the effects of droughts and floods, which are expected to intensify in the coming decades. This study's main objective was to quantify soil structural and hydraulic properties in plots under organic manure, organic leguminous, and conventional agricultural management and related tillage practices at Rodale Institute's Farming Systems Trial. Soil cores were collected at depths of 0–10, 10–20, and 20–30 cm and analyzed for soil water retention, saturated hydraulic conductivity (Ksat), soil organic C (SOC), bulk density, …

A Wireguard Exploration, Alexander Master, Christina Garman

CERIAS Technical Reports

Internet users require secure means of communication. Virtual Private Networks (VPNs) often serve this purpose, for consumers and businesses. The research aims of this paper were an analysis and implementation of the new VPN protocol WireGuard. The authors explain the cryptographic primitives used, build server and client code implementations of WireGuard peers, and present the benefits and drawbacks of this new technology. The outcome was a functional WireGuard client and server implementation, capable of tunneling all Internet traffic through a cloud-based virtual private server (VPS), with minimal manual configuration necessary from the end user. The code is publicly available.

Absolute Triple Differential Cross Sections For Low-Energy Electron Impact Ionization Of Biochemically Relevant Systems: Water, Tetrahydrofuran, And Hydrated Tetrahydrofuran, Jiaqi Zhou, Esam Ali, Maomao Gong, Shaokui Jia, Yutian Li, Yingying Wang, Zhen Zhang, Xiaorui Xue, Dmitry V. Fursa, Igor Bray, Xiangjun Chen, Don H. Madison, Alexander Dorn, Xueguang Ren

Physics Faculty Research & Creative Works

An experimental procedure is reported, which provides the absolute triple differential cross sections (ATDCSs) for electron-impact ionization of large (bio)molecules. This type of measurements represents the most stringent tests for new or existing theoretical models. We will use this procedure to test the accuracy of the best currently available theoretical models for the problems of electron-impact (65 eV) ionization of the molecules water (H₂O), tetrahydrofuran (C₄H₈O), and their hydrogen-bonded dimer H₂O · C₄H₈O. The cross sections were calculated using the molecular three-body distorted-wave (M3DW) model, the multicenter three-distorted-wave …

Exploring Linkages Between Landscape Patterns And Freshwater And Estuarine Bivalves In The Coast Range Of Oregon, Kaegan Michael Scully-Engelmeyer

Dissertations and Theses

Spatial configurations of landscape variables (biotic, abiotic, and socio-ecological) affect and are affected by ecological processes and species in watersheds. This dissertation explores relationships among landscape patterns, ecosystem processes and bivalve species dynamics in coastal watersheds in Oregon, USA. I approached this broad topic through two primary avenues of research: investigating cross-ecosystem threats from pesticide use in forestland management to downstream aquatic environments, and the landscape ecology of an at-risk freshwater mussel species.

Terrestrial land use activities present cross-ecosystem threats to riverine and marine species and processes. Specifically, pesticide runoff can disrupt hormonal, reproductive, and developmental processes in aquatic organisms, …