Physical Sciences and Mathematics Commons^™

Bi-Harmonic Maps' Existence And P-Balanced Energy And Connections To Harmonic Maps, Lina Wu

Publications and Research

We discover a bi-harmonic map’ existence, its energy growth, and its connections to a harmonic map. First, we prove the existence of a nontrivial bi-harmonic map in a unit sphere. Second, we investigate the p-balanced energy growth of biharmonic maps. As the most important energy technical breakthroughs, we propose an innovative energy algorithm called p-balanced energy technique to break the constraints of the existing L^q-energy technique in detecting L^q-energy growth towards boundlessness. The disadvantage of the finite L^q -energy technique in the L ^q spaces is not effective in dealing with infinite L^q- energy in Non-L^q spaces. Third, we study …

Deferred Grazing And Sheep At The Break Of Season In South West Western Australia, Department Of Primary Industries And Regional Development, Western Australia

Animal production and livestock factsheets

Grazing annual pastures in the first 12 days after germination can lower the productivity of pastures during winter by removing poorly rooted plants, and by reducing plant leaf area to sub-optimal levels. The Department of Primary Industries and Regional Development (DPIRD) recommends deferring grazing of pasture paddocks at the break-of-season until feed on offer is at least 500–800 kilograms of dry matter per hectare (kg DM/ha). At this level, pasture plants are likely to be firmly rooted and have sufficient leaf area to be productively grazed.

A Novel Method May Reveal Bulk Metallic Glass Compressive Ductility Trends In High Data Rate Nanoindentation, Jordan J. Sickle, Wesley H. Higgins, Wendelin Wright, George M. Pharr, Karin A. Dahmen

Faculty Journal Articles

Recent methods allow novel amorphous alloy compositions to be rapidly manufactured at small scale; however, obtaining materials properties such as compressive ductility from these smaller specimens has remained a challenge. Here, we suggest a potential high-throughput nanoindentation method that may be able to rapidly characterize the relative compressive ductility between these alloys based on their serration characteristics. The properties of emergent serrations, when interpreted in a simple micromechanical stress relaxation model, may order these materials by their compressive plastic strain to failure. These results are consistent with the ordering obtained from compressed specimens as well as with model simulations, suggesting …

Strong Edge Burst With Bipolar Non-Hermitian Skin Effect, Cem Yuce, Hamidreza Ramezani

Physics & Astronomy Faculty Publications

We consider a system exhibiting the bipolar non-Hermitian skin effect (NHSE), where bipolar skin states are localized at both edges, and discuss how the topological funneling effect can occur with a single focal point in this system. We explore a topological phase transition from bipolar NHSE to NHSE, which alters the localization characteristics of the eigenstates. After the transition, both the delocalized and bipolar skin states transform into skin states. The non-Hermitian edge burst is a novel and unexpected feature of non-Hermitian quantum dynamics, characterized by substantial particle loss at the boundary of a system. Using the model displaying bipolar …

High Resolution Assessment Of Commercial Fisheries Activity Along The Us West Coast Using Vessel Monitoring System Data With A Case Study Using California Groundfish Fisheries, Yi-Hui Wang, Benjamin Ruttenberg, Ryan K. Walter, Frank Pendleton, Jameal F. Samhouri, Owen R. Liu, Crow White

Physics

Commercial fisheries along the US West Coast are important components of local and regional economies. They use various fishing gear, target a high diversity of species, and are highly spatially heterogeneous, making it challenging to generate a synoptic picture of fisheries activity in the region. Still, understanding the spatial and temporal dynamics of US West Coast fisheries is critical to meet the US legal mandate to manage fisheries sustainably and to better coordinate activities among a growing number of users of ocean space, including offshore renewable energy, aquaculture, shipping, and interactions with habitats and key non-fishery species such as seabirds …

Exploring The Dynamics Of September Fish Spawning On The West Florida Shelf Through The Dna Barcoding Of Fish Eggs, Keith G. Keel

USF Tampa Graduate Theses and Dissertations

Identifying spawning areas for economically and ecologically important fishes is critical for fisheries conservation and ecosystem-based management. Additionally, monitoring the spawning dynamics of fishes is increasingly important as temperatures and oceanic conditions change. I used genetic barcoding to identify fish eggs collected across the West Florida Shelf (WFS) during September of 2013, 2014, and 2019. Fish eggs were collected on National Oceanic and Atmospheric Administration (NOAA) Southeast Area Monitoring and Assessment Program (SEAMAP) ichthyoplankton cruises using a Continuous Underway Fish Egg Sampler (CUFES). Analysis of 4,400 fish eggs from the three years resulted in the identification of 83 unique species …

Supplementary Files For: "Interactive Modeling Of Bear Lake Elevations In A Future Climate", Benjamin D. Shaw, Scout Jarman, Brennan Bean, Kevin R. Moon, Wei Zhang, Nathan Butler, Tommy Bolton, April Knight, Emeline Haroldsen, Abby Funk, Rebecca Higbee

Browse all Datasets

The water level, or elevation, of Bear Lake has a significant impact on agriculture, power, infrastructure, and recreation for communities around the lake. Climatological variables, such as precipitation, temperature, and snowfall, all have an impact on the elevation of Bear Lake. As the climate changes due to greenhouse gas emissions, the typical behaviors of these climate variables change, leading to new behaviors in Bear Lake elevation. Because of the importance of Bear Lake, it is vital to be able to model and understand how Bear Lake's elevation may change in the face of different climate scenarios and to gain further …

Ai's Ethical Frontier

DePaul Magazine

Artificial intelligence (AI) is affecting every aspect of the university and society. Experts from across DePaul share their insights on artificial intelligence's advantages and pitfalls. Learn about DePaul's new Artificial Intelligence Institute and research projects that use AI for societal benefit.

Class Notes

DePaul Magazine

DePaul alumni share news about their promotions, career moves, weddings, birth announcements, other accomplishments and more with the DePaul community. John Carruthers (CMN MA '09) makes pizzas to support nonprofits. Nyabweza Itaagi (LAS MA '18) helps grow a community-owned agro-eco district with a nature trail in a former rail corridor and conversions of vacant lots into urban farms.

Produced Water Management From Production Sites In The State Of Kuwait, Feras Adel Alsalem

Thesis/ Dissertation Defenses

Crude oil extraction leads to the production of produced water (PW). PW is by far the most significant by-product in the process of extracting hydrocarbons from the subsurface. Consequently, handling PW has become a great concern to oil and gas producers. The increasing amounts of PW and more stringent environmental and safety regulations in regard to PW make more efficient treatment methods necessary, where sustainable long-term solutions for PW management need to be provided. The focus of this study is on PW from onshore operations as the majority of the oil and gas extraction operations (upstream processes) are conducted onshore, …

Study On Law And Influencing Factors Of Air Leakage In Isolated Island Working Face With Large Burial Depth, Gang Wang, Mingze Xia, Shuliang Xie, Hao Xu, Shuxin Wang, Xintai Deng

Journal of Sustainable Mining

During the mining of a single coal seam isolated island work surface with large burial depth, the high mine pressures can crush and break the protective coal pillars, causing serious air leakages in the rear goaf. Herein, we use the analytic hierarchy process(AHP) to determine the main influencing factors of air leakage in island mining face. The air leakage source and sink in goaf were determined by measuring the differential pressures between the island mining face and the adjacent goaf using the energy level measurement method. The air volumes in the roadways were monitored on site to quantitatively analyze the …

Design, Synthesis And Characterization Of Zinc And Gold-Based Metal-Organic Frameworks And Complexes For The Detection And Treatment Of Cancer, May Reda Mohamed

Thesis/ Dissertation Defenses

The early detection of cancer plays a pivotal role in improving patient outcomes, emphasizing the urgent need for highly sensitive and selective biosensing platforms. Metal-Organic Frameworks (MOFs) have emerged as promising candidates in this domain due to their tunable properties, large surface area, and high porosity. Herein, the utilization of zinc-based MOF as a sophisticated biosensing platform tailored for the precise detection of the HER2 cancer biomarker is presented. HER2, a critical protein marker in breast cancer diagnostics and treatment, demands highly selective and accurate detection methods for effective patient management. Simple hydrothermal synthesis methodology has been adopted to synthetize …

Topological Indices And Their Applications In Designing Drugs, Fedaa Ismail Abunawa

Thesis/ Dissertation Defenses

This research delves into the use of indices, in the field of drug design with a specific focus on anticancer medications. Topological indices, values derived from representations of chemical structures provide meaningful connections to the physical and chemical characteristics of molecules. These indices act as tools for predicting behavior playing a vital role in crafting therapeutic drugs. The study primarily delves into topological indices like the Sombor index, Randić index, and Atom Bond Connectivity (ABC) index. These indices are calculated for structures and their relationships with physical properties such as molar volume, refractive index, and flash point are explored using …

What's In A Social Computing Course: Analyzing Computer And Information Science Syllabi, C. G. Delcourt, Sukrit Venkatagiri, E. Chandrasekharan

Computer Science Faculty Works

Social computing systems—such as social media and e-commerce platforms as well as search engines and collaboration software—not only drive vast economic value and societal impact, but are also becoming prominent topics in policy discourse. Although social technology companies heavily recruit students from Computer and Information Science (CS and IS) programs, and social computing is a well-established scholarly field within human-computer interaction (HCI) focused on the social interactions between people mediated through computational systems, little is known about social computing education. Consequently, in this paper we analyzed 25 undergraduate and graduate level courses titled “social computing.” First, as a fast-paced discipline …

Easy-Ai: Semantic And Composable Glyphs For Representing Ai Systems, Alexis Ellis, Brandon Dave, Hugh Salehi, Subhashini Ganapathy, Cogan Shimizu

Computer Science and Engineering Faculty Publications

Despite the rapid integration of artificial intelligence (AI) into various research domains and the lives of everyday people, challenges with communicating and understanding these AI systems arise. The lack of a consistent method of communication highlights the need for a transdisciplinary approach to explain the inner workings of AI systems in a cohesive and accessible manner. We thus propose an ontological visual framework using semantically-enhanced, symbols, providing a symbolic language for conveying the structure, purpose, and characteristics of AI systems. The framework encompasses a generalizable glyph set of various AI system components, ensuring both common and obscure architectures can be …

Wildfire Smoke Impacts Lake Ecosystems, Mary Jade Farruggia, Janice Brahney, Andrew J. Tanentzap, Jennifer A. Bentrup, Ludmila S. Brighenti, Sudeep Chandra, Alicia Cortés, Rocio L. Fernandez, Janet M. Fischer, Alexander L. Forrest, Yufang Jin, Kenneth Larrieu, Ian M. Mccullough, Isabella A. Oleksy, Rachel M. Pilla, James A. Rusak, Facundo Scordo, Adrianne P. Smits, Celia C. Symons, Minmeng Tang, Samuel G. Woodman, Steven Sadro

Watershed Sciences Faculty Publications

Wildfire activity is increasing globally. The resulting smoke plumes can travel hundreds to thousands of kilometers, reflecting or scattering sunlight and depositing particles within ecosystems. Several key physical, chemical, and biological processes in lakes are controlled by factors affected by smoke. The spatial and temporal scales of lake exposure to smoke are extensive and under-recognized. We introduce the concept of the lake smoke-day, or the number of days any given lake is exposed to smoke in any given fire season, and quantify the total lake smoke-day exposure in North America from 2019 to 2021. Because smoke can be transported at …

Demystifying The "Social Media Algorithm": The Legacy Of Surveillance Advertising And Platformization, Garrett Crites

Honors Projects

Recently, more individuals are becoming aware that they are being served content on social media platforms by automated means. Due to the lack of transparency, a colloquial understanding of the “social media algorithm” has emerged in popular discourse. To shed light on the real–world phenomena that these ideas surround, I look at the rise of surveillance advertising and the platformization of the internet in conjunction with the automated platform operations employed by large social media platforms like Facebook, YouTube, TikTok, and X. In doing so I provide a clearer idea of the colloquial “social media algorithm” to encourage the reader …

Investigating The Instagram Comments Of Professional Soccer Players: The Impact Of Social Media On Athletic Performance, Samuel Carlson Winchester

Quantitative Social Science Undergraduate Senior Theses

Since the rise of social media platforms like Facebook, Instagram, and Twitter, many celebrities have spoken out about the influence social media has on their mental health. Among the most vocal have been professional athletes, who have highlighted the hateful comments and direct messages they receive from fans on social media platforms. In some cases, athletes have even chosen to step away from social media to avoid the toxicity of their timeline. Accordingly, researchers have studied the impact social media has on professional athletes’ mental health, in some cases focusing on how social media can negatively impact professional athletes’ athletic …

Machines Of The Absurd: Leveraging Generative Ai For Creativity, Humor, And Playfulness, Tyler Sanders

College of Computing and Digital Media Dissertations

Machines of The Absurd is a collection of four projects exploring how generative AI can be leveraged for creativity, humor and playfulness.

1. neverOS — A node-based visual playground for interacting with large language models.

2. Other Calc — An iOS app with a calculator interface, where players can “calculate” text instead of numbers.

3. What Must Burn — An experiment where players type in text that can be dragged into a campfire to produce contextually appropriate sound effects.

4. Jazz vs Waffles — A turn-based comedy game, where players battle anything they type in.

Together, these projects make the …

Oscillations In Neuronal Activity: A Neuron-Centered Spatiotemporal Model Of The Unfolded Protein Response In Prion Diseases, Elliot M. Miller, Tat Chung D. Chan, Carlos Montes-Matamoros, Omar Sharif, Laurent Pujo-Menjouet, Michael R. Lindstrom

School of Mathematical & Statistical Sciences Faculty Publications

Many neurodegenerative diseases (NDs) are characterized by the slow spatial spread of toxic protein species in the brain. The toxic proteins can induce neuronal stress, triggering the Unfolded Protein Response (UPR), which slows or stops protein translation and can indirectly reduce the toxic load. However, the UPR may also trigger processes leading to apoptotic cell death and the UPR is implicated in the progression of several NDs. In this paper, we develop a novel mathematical model to describe the spatiotemporal dynamics of the UPR mechanism for prion diseases. Our model is centered around a single neuron, with representative proteins P …

Yang-Baxter Equations, David Lovitz

Dissertations and Theses

Multiple equations in math, physics, quantum information, and elsewhere are referred to as "the" Yang-Baxter equation, in spite of being a broad family of equations. Most of the equations are nonlinear matrix equations, where the unknown variable is a matrix. This is the case for the so called braided, algebraic, and generalized forms of "the" equation, which are the primary focus of this dissertation. Finding solutions to the various forms of these equations has been the subject of much research. The equations in all their forms are largely considered intractable in high dimensions, and only in dimension 2 have the …

Residential Metals Abatement Program Investigation Summary Report Kennedy Elementary School Post- Remedial Action Surface Dust Sampling, Christopher Berg, Elsie King

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Evaluating The Basement Design Of Low-Rise Building With Two-Stage Analysis Using Bim Integration: Hangar Study Case, Given Tohho, Jessica Sjah, Ayomi Dita Rarasati, Bambang Trigunarsyah

Smart City

Building Information Modelling (BIM) has revolutionized the way the construction industry designs, constructs, and manages buildings. Certainly, the utilization of BIM can optimize the usage of materials in a construction project, considering the high level of concrete consumption globally and its significant environmental impact. The implementation of BIM is intended to calculate the volume of concrete and steel material usage in the design process of low-rise buildings with basements, exemplified in this case by a 5-story laboratory hangar with a 1-story basement. The building design is carried out through a two-stage analysis, which involves separating the upper portion from the …

The Role Of Digital Citizenship Using Modern Communication And Media Tools In Enhancing Social Responsibility Among Students Of The Middle East University, Ramzi Mubarak Al Tarawneh, Sahar Mohammad Al Tarawneh

Middle East Journal of Communication Studies

The study aims to explore the role of digital citizenship using modern communication and media tools in enhancing social responsibility among MEU students. A descriptive-analytical approach was used. The study employed a simple random sampling method, with a sample size of 421 students. The findings indicated a statistically significant impact of digital citizenship using modern communication and media tools on social responsibility in its various dimensions. Both digital citizenship using modern communication and media tools and social responsibility were practiced at a high level. Furthermore, a strong correlation was found between digital citizenship using modern communication and media tools and …

Topological Regression As An Interpretable And Efficient Tool For Quantitative Structureactivity Relationship Modeling, Ruibo Zhang, Daniel Nolte, Cesar Sanchez-Villalobos, Souparno Ghosh, Ranadip Pal

Department of Statistics: Faculty Publications

Quantitative structure-activity relationship (QSAR)modeling is a powerful tool for drug discovery, yet the lack of interpretability of commonly used QSAR models hinders their application inmolecular design.We propose a similaritybased regression framework, topological regression (TR), that offers a statistically grounded, computationally fast, and interpretable technique to predict drug responses. We compare the predictive performance of TR on 530 ChEMBL human target activity datasets against the predictive performance of deep-learning-based QSAR models. Our results suggest that our sparse TR model can achieve equal, if not better, performance than the deep learningbased QSAR models and provide better intuitive interpretation by extracting an approximate …

Experimental Methods In Predicting Market Drift And Other Portfolio Optimization Factors Using Graph Theory, Perry Harrison Zhang

Computer Science Senior Theses

No abstract provided.

What Is The Nature Of Little Red Dots And What Is Not, Miri Smiles Edition, Pablo G. Pérez-González, Guillermo Barro, George H. Rieke, Jianwei Lyu, Marcia Rieke, Stacey Alberts, Christina C. Williams, Kevin Hainline, Fengwu Sun, Dávid Puskás, Marianna Annunziatella, William M. Baker, Andrew J. Bunker, Eiichi Egami, Zhiyuan Ji, Benjamin D. Johnson, Brant Robertson, Bruno Rodríguez Del Pino, Wiphu Rujopakarn, Irene Shivaei, Sandro Tacchella

Pacific Faculty Work

We study 31 little red dots (LRD) detected by JADES/NIRCam and covered by the SMILES/MIRI survey, of which ∼70% are detected in the two bluest MIRI bands and 40% in redder MIRI filters. The median/quartiles redshifts are z = 6.9 5.9 7.7 (55% spectroscopic). The spectral slopes flatten in the rest-frame near-infrared, consistent with a 1.6 μm stellar bump but bluer than direct pure emission from active galactic nuclei (AGN) tori. The apparent dominance of stellar emission at these wavelengths for many LRDs expedites stellar mass estimation: the median/quartiles are log M ⋆ / M ⊙ = 9.4 9.1 9.7 …

2024 Spring Term Sls261/Phy206 Syllabus, Gustavo Machado Monteiro

Open Educational Resources

No abstract provided.

Access To Prostate-Specific Antigen Testing And Mortality Among Men With Prostate Cancer, Hari S. Iyer, Benjamin V. Stone, Charlotte Roscoe, Mei Chin Hsieh, Antoinette M. Stroup, Charles L. Wiggins, Fredrick R. Schumacher, Scarlett L. Gomez, Timothy R. Rebbeck, Quoc Dien Trinh

School of Public Health Faculty Publications

Importance: Prostate-specific antigen (PSA) screening for prostate cancer is controversial but may be associated with benefit for certain high-risk groups. Objectives: To evaluate associations of county-level PSA screening prevalence with prostate cancer outcomes, as well as variation by sociodemographic and clinical factors. Design, Setting, and Participants: This cohort study used data from cancer registries based in 8 US states on Hispanic, non-Hispanic Black, and non-Hispanic White men aged 40 to 99 years who received a diagnosis of prostate cancer between January 1, 2000, and December 31, 2015. Participants were followed up until death or censored after 10 years or December …

Back To The Future: A Case For The Resurgence Of Approximation Theory For Enabling Data Driven “Intelligence”, Michael Dominic Ciocco

Theses and Dissertations

Artificial Intelligence (AI) has exploded into mainstream consciousness with commercial investments exceeding $90 billion in the last year alone. Inasmuch as consumer-facing applications such ChatGPT offer astounding access to algorithms that were hitherto restricted to academic research labs, public focus of attention on AI has created an avalanche of misinformation. The nexus of investor-driven hype, “surprising” inaccuracies in the answers provided by AI models – now anthropomorphically labeled as “hallucinations”, and impending legislation by well-meaning and concerned governments has resulted in a crisis of confidence in the science of AI. The primary driver for AI’s recent growth is the convergence …