Physical Sciences and Mathematics Commons^™

Finding Higher Order Interactions Using Local Corex, Thomas Kerby

Student Research Symposium

In applications such as financial markets, social networks, and gene expression data, the variables often interact in complex ways. Yet accurately characterizing pairwise variable interactions can be a difficult task, let alone efficiently characterizing complex higher-order interactions, which is an unsolved problem. This difficulty is exacerbated when variable interactions change across the data. For example, gene interactions in single-cell RNA-sequencing (scRNA-seq) data will typically differ from one cell type to another. To solve these problems, we propose a new method called Local Correlation Explanation (CorEx). Local CorEx captures higher-order variable interactions at a local scale by first clustering data points …

The Connections Between Musculoskeletal Injury And Global Reaction, Keaton Reel

Student Research Symposium

The peripheral effects of severe musculoskeletal injury are a well-studied phenomenon, but less well studied are the neural deficits. Past research has demonstrated that such severe injuries, specifically torn and reconstructed anterior cruciate ligament (ACL), may increase cognitive burden due to lack of afferent feedback from damaged nerves. This has previously shown to lead to delayed voluntary reactions in the lower extremities, but global neural changes are currently unknown. The goal of the conducted research was to determine whether neuromuscular deficits due to ACL injury and reconstruction in one limb influences motor behavior on a global level. Simple reaction time, …

Modeling The Extended Low And Sudden High Periods Of Activity In Infectious Diseases, Dana Strong

Student Research Symposium

This research explores how the aggregation of individuals during disease spread may, in conjunction with noise, explain how some diseases’ trajectories spend some time at low numbers after which there is a sudden outbreak.

Gpu Accelerated Preconditioning Of The Plasma Kinetic Equation, D. Caleb Price

Student Research Symposium

Solving the plasma kinetic equation provides higher-order moments to better approximate an accurate time evolution of plasma behavior contained in a tokamak. NIMROD seeks to produce code to simulate and model these macroscopic dynamics. Essential to this code’s efficiency is the preconditioning of matrices. I studied how compiling a GPU-enabled third-party library, SuperLU, would improve this preconditioning time for a test version of NIMROD's code. We found that the time of preconditioning decreased significantly when GPUs were allocated versus when only CPUs were, which provides understanding for the future utilization of GPUs by the NIMROD code directly.

Application Of Acceleration Data To Inertial Navigation, Eric Eastham

Student Research Symposium

In many fields, there exists a need for knowing the precise location of an object. In many cases, the Global Positioning System can be used to determine the precise location of an object, and even its speed and acceleration, to an accuracy of within 10 to 30 feet. In some cases however, such as in applications in space exploration, this is unavailable. Without reference to exterior points, inertial navigation can be a useful tool to determine an object's current location based on the prior movement and rotational changes made. The position is determined by taking the accelerations throughout the course …

Detonation Of A White Dwarf Star: Simulations Of The Sub-Chandrasekhar Type 1a Supernovae, Melissa Rasmussen

Student Research Symposium

A type Ia supernova can result from the double detonation of a white dwarf star below the Chandrasekhar mass limit. Using the hydrodynamics code Castro, we simulate this detonation by perturbing a carbon/oxygen white dwarf with an accumulated shell of helium, with a small amount of nitrogen-14. In this work, we investigate the robustness of the model. Adjusting the location of the perturbation affects whether detonation occurs. Changing the composition of the helium shell affects the speed at which it burns. The size of the reaction network used affects whether the star's core burns immediately or from a shock wave …

Detecting Climate Change In Trilobite Time, Michelle Norman

Student Research Symposium

Trilobites are a signature marine fossil of the Cambrian explosion, which took place about 500 Ma (million years ago). By studying these fossiliferous rocks (limestone), we can get an understanding of ecological and environmental change. In fact, we can detect the ancient carbon cycle by measuring stable carbon isotopes in these limestone samples. By studying the carbon environment the trilobites lived in and which trilobite species evolve or go extinct, we can learn more about ancient climate events and constrain them to a certain period of time based off the age of radioactive zircons we find in sandy material around …

The Effects Of Moisture On The Conductivity Of M55j Carbon Fiber Composites, Crystal Tingle

Student Research Symposium

In this research, we studied the effects that humidity (moisture) can have on M55J Carbon Fiber Composite samples.

Observation Of B0 →Ψ(2s)K0SΠ+Π− And B0S→Ψ(2s)K0S Decays, A. Tumasyan

Department of Physics and Astronomy: Faculty Publications

Using a data sample of √ s = 13 TeV proton-proton collisions collected by the CMS experiment at the LHC in 2017 and 2018 with an integrated luminosity of 103 fb⁻¹, the B⁰_s → ψ(2S)K⁰_S and B⁰ → ψ(2S)K⁰_Sπ ⁺ π ⁻ decays are observed with significances exceeding 5 standard deviations. The resulting branching fraction ratios, measured for the first time, correspond to B(B⁰_s → ψ(2S)K⁰_S)/B(B⁰ → ψ(2S)K⁰_S) = (3.33 ± 0.69(stat) ± 0.11 (syst) ± 0.34 ( …

Rayleigh Scattering Is The Reason The Sky Is Blue, Samuel Monson

Student Research Symposium

In this experiment what is examined is light scattering. What was done was taking a spectrometer and taking in the sunlight over long periods of time. The goal here is to both identify and determine when Rayleigh or Mie Scattering is taking place. In Rayleigh scattering what should appear is blue light, and in Mie other kinds of light should be observed.

The Effects Of Absorbed Water On Electrostatic Breakdown Testing, Megan Loveland Dewaal

Student Research Symposium

A critical property of electrical insulators is the breakdown voltage. When exposed to a high enough voltage, the insulator will be permanently damaged and unable to block significant current flow which can lead to the compromise of important electrical equipment. This becomes a concern for applications like spacecraft missions, high voltage direct current power, and microelectronics, as well as many others. Recent preliminary tests suggested that water vapor on the surface of insulators may increase their breakdown voltage and influence phenomena observed during breakdown testing, such as partial discharges, partial breakdowns, and surface flashovers. In this study, thin film PEEK …

Simultaneous Simulation Of Microgravity And Ionizing Radiation In A Laboratory Environment, Achal Duhoon

Student Research Symposium

A novel system was developed to simulate the combined effects of reduced gravity and ionizing radiation present during spaceflight on biological and particulate samples. The miniature rotary cell culture system (mRCCS) was designed to synchronously rotate up to five independent vessels containing particulate samples suspended in fluid media, constructed using radiation tolerant, biocompatible, and vacuum compatible materials. Reduced gravity conditions were achieved when suspended particles (e.g., 200 μm polystyrene microcarrier beads with or without adhered cell clusters) were suspended inside the vessels moving near terminal velocity in viscous neutral-buoyant fluid media with densities matched to the suspended particles to achieve …

Preparation And Characterization Of Highly Insulating Granular Samples For Electron Yield Measurement, Heather Allen

Student Research Symposium

This experiment focuses primarily on the preparation and characterization of granular samples for the eventual purpose of electron yield measurements. Highly insulating granular samples are notoriously difficult to prepare and present a myriad ofcomplications from both experimental and practical frameworks. A famous example of this was during the 1969 Apollo 11 mission when electrostatically adhered lunar dust damaged the equipment and astronauts suits and led to purported health effects. The electrical properties of this dust for charging and discharge is essential to preventing these effects. In this study, particles of varying size, shape, and composition are used to create multilayered …

Measuring Sustainable Development Through Tax Increment Financed Brownfield Redevelopment Statutes: A Florida Case Study, Jeff Burton

USF Tampa Graduate Theses and Dissertations

This research measures the theoretically sustainable development synergy of United States’ redevelopment, tax increment, and brownfield statutes and questions local redevelopment professionals on this combination’s implementation. This policy’s integration and application measurements guide increased knowledge and best practice methods in the path of America’s population migration into urbanized areas, thus managing the economic, environmental, and social impacts for future generations.

This examination used a pragmatic, qualitative, and quantitative mixed-method approach to identify, collect, code, and analyze redevelopment, tax increment, and state brownfields laws. An exhaustive literature review of the laws’ histories explained when and why they exist. In addition, a …

Pro-Inflammatory Diet Pictured In Children With Atopic Dermatitis Or Food Allergy: Nutritional Data Of The Lina Cohort, Olivia Schütte, Larissa Bachmann, Nitin Shivappa Mbbs, Mph, Ph.D., James R. Hébert Scd, Janine F. Felix, Stefan Röder, Ulrich Sack, Michaek Borte, Wieland Kiess, Ana C. Zenclussen, Gabriele I. Stangl

Faculty Publications

Background: Lifestyle and environmental factors are known to contribute to allergic disease development, especially very early in life. However, the link between diet composition and allergic outcomes remains unclear. Methods: In the present population-based cohort study we evaluated the dietary intake of 10-year-old children and analyses were performed with particular focus on atopic dermatitis or food allergy, allergic diseases known to be affected by dietary allergens. Dietary intake was assessed via semi-quantitative food frequency questionnaires. Based on these data, individual nutrient intake as well as children’s Dietary Inflammatory Index (C-DII™) scores were calculated. Information about atopic manifestations during the first …

Improving Negation Detection With Negation-Focused Pre-Training, Hung Thinh Truong, Timothy Baldwin, Trevor Cohn, Karin Verspoor

Natural Language Processing Faculty Publications

Negation is a common linguistic feature that is crucial in many language understanding tasks, yet it remains a hard problem due to diversity in its expression in different types of text. Recent work has shown that state-of-the-art NLP models underperform on samples containing negation in various tasks, and that negation detection models do not transfer well across domains. We propose a new negation-focused pre-training strategy, involving targeted data augmentation and negation masking, to better incorporate negation information into language models. Extensive experiments on common benchmarks show that our proposed approach improves negation detection performance and generalizability over the strong baseline …

Atlantic Richfield Response To Agency Comments On The Draft Butte Priority Soils Operable Unit (Bpsou) 2021 Groundwater Monitoring Data Summary Report, January 2021 – December 2021; Dated April 8, 2022, Atlantic Richfield Company

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: 2021 Butte Priority Soils Operable Unit (Bpsou) Draft Groundwater Monitoring Data Summary Report. Consent Decree- Civil Action No. Cv 89-039-Bu-She, Adrian Kien

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Butte Priority Soils Operable Unit (Bpsou) Draft 2021 Site-Wide Surface Water Monitoring Data Summary Report. Consent Decree- Civil Action No. Cv 89-039-Bu-She, Adrian Kien

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Butte Priority Soils Operable Unit (Bpsou) Silver Bow Creek/Butte Area Npl Site, Atlantic Richfield Company

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Pre-Growth Environmental Stresses Affect Foodborne Pathogens Response To Subsequent Chemical Treatments, Amandeep Singh, Veerachandra K. Yemmireddy

School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Foodborne pathogens such as Salmonella, E. coli O157:H7, and Listeria monocytogenes are known to survive under different environmental stresses with an effect on their physiological properties. The purpose of this study was to determine the effect of different environmental stresses on the foodborne pathogens response to subsequent chemical treatments. Three types of pathogens Salmonella, E. coli O157:H7, and Listeria monocytogenes were subjected to different environmental stresses: (i) Desiccation (ii) high salt (iii) low pH, and (iv) temperatures (14, 23, and 37 °C) during their growth. The cells harvested at their early stationary growth phase were subsequently subjected to chlorine (100 …

Spatial And Temporal Variations Of Microplastic Concentrations In Portland's Freshwater Ecosystems, Rebecca Talbot, Elise F. Granek, Heejun Chang, Rosemary Wood, Susanne Brander

Geography Faculty Publications and Presentations

While microplastics are a pollutant of growing concern in various environmental compartments, less is known regarding the sources and delivery pathways of microplastics in urban rivers. We investigated the relationship between microplastic concentrations and various spatiotemporal factors (e.g., land use, arterial road length, water velocity, precipitation) in two watersheds along an urban-rural gradient in the Portland metropolitan area. Samples were collected in August, September, and February and were analyzed for total microplastic count and type. Nonparametric statistics were used to evaluate potential relationships with the explanatory variables, derived at both the subwatershed and near stream scales. In August, microplastic concentrations …

Measurement Of Two-Particle Correlations Of Hadrons In E+E-Collisions At Belle, Y. C. Chen, Y. J. Lee, P. Chang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Bodrov, J. Borah, M. Bračko, P. Branchini

Faculty and Student Publications

The measurement of two-particle angular correlation functions in high-multiplicity e+e-collisions at s=10.52 GeV is reported. In this study, the 89.5 fb-1 of hadronic e+e-annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δφ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. …

Thickness Of Fluvial Deposits Records Climate Oscillations, Xiaoping Yuan, Laure Guerit, Jean Braun, Delphine Rouby, Charles Shobe

Faculty & Staff Scholarship

Fluvial deposits offer Earth’s best-preserved geomorphic record of past climate change over geological timescales. However, quantitatively extracting this information remains challenging in part due to the complexity of erosion, sediment transport and deposition processes and how each of them responds to climate. Furthermore, sedimentary basins have the potential to temporarily store sediments, and rivers subsequently rework those sediments. This may introduce time lags into sedimentary signals and obscure any direct correlation with climate forcing. Here, using a numerical model that combines all three processes—and a new analytical solution—we show that the thickness of fluvial deposits at the outlet of a …

Representing And Analyzing The Dynamics Of An Agent-Based Adaptive Social Network Model With Partial Integro-Differential Equations, Hiroki Sayama

Northeast Journal of Complex Systems (NEJCS)

We formulated and analyzed a set of partial integro-differential equations that capture the dynamics of our adaptive network model of social fragmentation involving behavioral diversity of agents. Previous results showed that, if the agents’ cultural tolerance levels were diversified, the social network could remain connected while maintaining cultural diversity. Here we converted the original agent-based model into a continuous equation-based one so we can gain more theoretical insight into the model dynamics. We restricted the node states to 1-D continuous values and assumed the network size was very large. As a result, we represented the whole system as a set …

Azo-Dye-Functionalized Polycarbonate Membranes For Textile Dye And Nitrate Ion Removal, Carrie Cockerham, Ashton Caruthers, Jeremy Mccloud, Laura Fortner, Sungmin Youn, Sean P. Mcbride

Physics Faculty Research

Challenges exist in the wastewater treatment of dyes produced by the world’s growing textiles industry. Common problems facing traditional wastewater treatments include low retention values and breaking the chemical bonds of some dye molecules, which in some cases can release byproducts that can be more harmful than the original dye. This research illustrates that track-etched polycarbonate filtration membranes with 100-nanometer diameter holes can be functionalized with azo dye direct red 80 at 1000 µM, creating a filter that can then be used to remove the entire negatively charged azo dye molecule for a 50 µM solution of the same dye, …

On Solvability Of The Integro-Differential Equations, Faez N. Ghaffoori

Al-Qadisiyah Journal of Pure Science

In this paper, we study the existence of solution to integro-differential equations in the space of Lebesgue-integrable on un-bounded interval after transformed to nonlinear integral functional equation, the used tool is the fixed point theorem due to Schauder with weak measure of non compactness, due to De-Blasi. In addition, we give an example which satisfies the conditions of our existence theorem.

The Cyclic Decomposition Of Cf(Q_14×C_2p)/ R ̅(Q_14×C_2p), Naseer Rasool Albakaa, Habeeb Kareem Al-Bdairi, Neeran Tahir Abd Alameer

Al-Qadisiyah Journal of Pure Science

In this paper, we propose the cyclic decomposition of the factor group , and the group is Z-valued class functions of the direct product group under the operation of addition, and is the subgroup of the generalized characters of the group .Then is an abelian factor group denoted by where is the quaternion group of order and is the cyclic group of order . Also, we find the rational valued characters table of the group when and prime numbers and is given as follows

Blow Up Of Solutions For Viscoelastic Wave Equations Of Kirchhoff Type With Variable Exponents, Erhan Pişkin, Veysel Butakın

Al-Qadisiyah Journal of Pure Science

In this paper, we consider a viscoelastic wave equation of Kirchhoff type with variable exponents. We show that under suitable conditions on the initial data and initial energy, the energy of solutions blow up in finite time with negative initial energy.

About Some Numerical Semigroupswith Embedding Dimension Three, Ahmet Çelik, Mehmet Sait Alakuş, Sedat İlhan

Al-Qadisiyah Journal of Pure Science

we will examine a family of numerical semigroups embedding dimension three, such that S_u=< 8,8u+2,8u+9> where u >=1, u is integer . Also, we will give some relations between these semigroups and their Arf closure.