Digital Commons Network^™

"Touch&Play" Wood Typification By The Masspec Pen, Felipe R P Mansoldo, Alane Beatriz Vermelho, Rosineide Costa Simas, Livia S Eberlin, Marcos N Eberlin

Faculty, Staff and Students Publications

We have investigated the ability of a MasSpec Pen (MSPen) "three-in-one" (extraction, transfer, and ionization) device coupled to a mass spectrometer to provide instantaneous chemical profiles that could promptly characterize wood samples from the mahogany (Meliaceae) family. For that, we selected a set of five representative wood species, that is, Brazilian mahogany (Swietenia macrophylla, also known as Honduran mahogany), two African mahoganies (Khaya ivorensis and Khaya senegalensis), and two "nongenuine" ("fake") mahogany woods: cedar (Cedrela odorata) and andiroba (Carapa guianensis). By simply touching the superficially polished wood surface and after 3 s of automatic extraction, profiles of highly characteristic markers …

Biomolecular Condensates In Immune Cell Fate, Yun Huang, Bruno Di Stefano

Faculty, Staff and Students Publications

Fate decisions during immune cell development require temporally precise changes in gene expression. Evidence suggests that the dynamic modulation of these changes is associated with the formation of diverse, membrane-less nucleoprotein assemblies that are termed biomolecular condensates. These condensates are thought to orchestrate fate-determining transcriptional and post-transcriptional processes by locally and transiently concentrating DNA or RNA molecules alongside their regulatory proteins. Findings have established a link between condensate formation and the gene regulatory networks that ensure the proper development of immune cells. Conversely, condensate dysregulation has been linked to impaired immune cell fates, including ageing and malignant transformation. This Review …

Ophthalmology Examinations In Children With Skull Fractures And Underlying Focal Hemorrhage, Gil Binenbaum, Daniel M Lindberg, Angela Bachim, Colleen J Bressler, Lori Frasier, Terra Frazier, Nicole R Johnson, Natalie Laub, Megan M Letson, Tagrid Ruiz-Maldonado, Matthew Valente, Jenna Kiely, Jan Leonard, M Katherine Henry

Faculty, Staff and Students Publications

Objectives: To assess the frequency and yield of retinal examination in children below 2 years old undergoing abuse evaluations in the setting of skull fracture(s) and small underlying intracranial hemorrhage.

Methods: This cross-sectional study used CAPNET, a multicenter child physical abuse network, to identify children below 2 years with a skull fracture(s) and intracranial injury limited to an underlying small focal intracranial hemorrhage undergoing subspeciality child abuse evaluations. Our outcomes of interest were (1) the performance of a retinal examination, (2) the identification of retinal hemorrhages, and (3) associations of clinical factors and CAPNET site with the performance of retinal …

On The Sensitivity Of Short Design Waves For Semi-Submersible Wind Platforms, S.A. Brown, T. Tosdevin, M. Hann, D.M. Greaves

School of Engineering, Computing and Mathematics

Determining ultimate loads and platform motions is essential for both survivability and cost-effectiveness in the development of floating offshore wind. Current design standards utilise time-consuming methodologies that rely on irregular sea state simulations to determine design loads. Design waves offer the potential to accelerate the design process through the simulation of shorter wave profiles that specifically target extreme responses. However, it is not well understood how reliable design waves are for floating devices. Using a mid-fidelity numerical tool, this paper explores the characteristic loads produced by four design wave methods for a semi-submersible floating wind device over a wide range …

Ccp-Wsi Blind Test Series 5: Numerical Investigation Of Isothermal Sloshing In A Circular Tank Using Openfoam, Scott Brown, Vivek Francis, Stuart Colville, Deborah Greaves, Ignacio Pregnan Johanessen

School of Engineering, Computing and Mathematics

Sloshing dynamics in partially filled tanks is a critical concern across various engineering disciplines, including maritime, aerospace, automotive, and industrial applications. This work concerns a series of sloshing test cases using computational fluid dynamics and represents an individual contribution to the CCP-WSI Blind Test Series 5, in which the submitted results are compared against both physical and alternative numerical solutions. Free surface and centre of gravity measurements are presented and the sensitivity to crucial numerical techniques such as turbulence modelling are assessed. Results suggest that capturing the onset of excitation is particularly sensitive to the choice of turbulence model and …

Developing Human-Autonomy Teaming Strategies For Maritime Cyber Security Resilience In Uncrewed Autonomous And Remote Surface Vessel Operations, Juan Palbar Misas, Kimberly Tam, Kevin Jones

School of Engineering, Computing and Mathematics

The development of new technologies and digital capabilities for Uncrewed Autonomous and Remote Surface Vessel Operations (UARSVO) is driven by various industry stakeholders. This evolution impacts the maritime industry's human role, transforming from Human-Autonomy Hybrid (HAH) to Human-Autonomy Teaming (HAT). Human-Autonomy Collaboration (HAC) is vital for maritime safety, security, and sustainability, particularly in light of increasing cyber incidents in remote operations, which necessitates greater cyber resilience due to technology at sea and ashore. This paper aims to provide a holistic socio-technical approach to investigate and present an overview of the current state-of-the-art research, focusing on the human perspective in maritime …

Eye Catching, Ann Marie Kumfer, Stephanie V Sherman

Faculty, Staff and Students Publications

A 55 year-old man with type 2 diabetes mellitus presented to the emergency department with subacute nausea, vomiting, and abdominal pain. He was found to have epididymitis and hyperglycemia that improved with antibiotics and supportive care. However, he was also discovered to have significant acute kidney injury and chronic, relapsing-remitting bouts of eye pain and redness, confirmed to be uveitis on ophthalmologic evaluation. Despite completing an appropriate course of antibiotics, his pyuria and kidney injury persisted. An extensive infectious, autoimmune, and malignancy work-up was negative. As such, renal biopsy was pursued and revealed findings consistent with tubulointerstitial nephritis. With a …

Analytical Modelling Of Chloride Diffusion In Circular Section Concrete Columns With Binding Effects, Zaiwei Li, Long-Yuan Li

School of Engineering, Computing and Mathematics

– Reinforced concrete structures in marine environments face significant durability challenges due to chloride-induced corrosion of the steel reinforcement. Understanding and modelling chloride ingress are critical for the prediction of the service life of these structures. This study presents an analytical model for chloride diffusion in circular section concrete columns, addressing a critical gap in existing research by incorporating the effects of chloride binding. The model employs a bilinear chloride binding isotherm to derive an analytical solution in cylindrical coordinates, which captures the nonlinear interaction between free and bound chlorides. Validation is performed by comparing the model's predictions with numerical …

After Notice And Choice: Reinvigorating “Unfairness” To Rein In Data Abuses, Lina M. Khan, Samuel A.A. Levine, Stephanie T. Nguyen

Faculty Scholarship

The Federal Trade Commission (FTC) has long served as America’s default privacy enforcer. Yet for much of its history, the agency relied on self-regulation through a “notice and choice” framework that left the public vulnerable in an era of rampant data collection and digital surveillance. Businesses overwhelmed users with dense privacy notices while amassing and exploiting vast troves of personal data. The agency’s historical approach, rooted in outdated assumptions about self-correcting markets and an ideologically cramped view of the FTC’s authorities and mandate, helped usher in a digital economy where data abuses became routine.

During the Biden Administration, the FTC …

Biomarkers Of Cellular Senescence And Major Health Outcomes In Older Adults, Theresa Mau, Roger A Fielding, Elizabeth J Atkinson, Sheena Patel, Nathan Lebrasseur

Faculty, Staff and Students Publications

The geroscience hypothesis proposes that underlying biological processes, such as the accumulation of senescent cells, have deleterious effects on multiple tissues and increase the risk of many chronic conditions with aging. Senescent cells produce heterogenous biomarkers, also called senescence-associated secretory phenotype (SASP). Circulating concentrations of senescence biomarkers may reflect an underlying burden of senescent cells in various tissues. Plasma levels of these proteins have been associated with increased mortality and poorer physical function. The associations of them with the incidence of major age-related conditions including heart failure, cardiovascular disease, stroke, and dementia, have not been studied. We measured 35 senescence …

Externally Validated Digital Decision Support Tool For Time-To-Osteoradionecrosis Risk-Stratification Using Right-Censored Multi-Institutional Observational Cohorts, Laia Humbert-Vidan, Serageldin Kamel, Andrew Wentzel, Zaphanlene Kaffey, Moamen Abdelaal, Natalie A West, Guadalupe Canahuate, Xinhua Zhang, Melissa M Chen, Kareem A Wahid, Jillian Rigert, Seyedmohammadhossein Hosseinian, Andrew J Schaefer, Kristy K Brock, Mark Chambers, Adegbenga O Otun, Ruth Aponte-Wesson, Vinod Patel, Andrew Hope, Jack Phan, Adam S Garden, Steven J Frank, William H Morrison, Michael T Spiotto, David Rosenthal, Anna Lee, Renjie He, Mohamed A Naser, Erin Watson, Katherine A Hutcheson, Abdallah S R Mohamed, Vlad C Sandulache, Lisanne V Van Dijk, Amy C Moreno, Teresa Guerrero Urbano, Clifton D Fuller, Stephen Y Lai

Faculty, Staff and Student Publications

Background: Existing studies on osteoradionecrosis of the jaw (ORNJ) have primarily used cross-sectional data, assessing risk factors at a single time point. Determining the time-to-event profile of ORNJ has important implications to monitor oral health in head and neck cancer (HNC) long-term survivors.

Methods: Data were retrospectively obtained for a clinical observational cohort of 1129 patients (198 ORNJ cases) with HNC treated with radiotherapy (RT) at The University of Texas MD Anderson Cancer Center. A Weibull Accelerated Failure Time model was trained on previously identified dosimetric, clinical and demographic predictors. External validation was performed using an independent cohort of 265 …

Functional Mobility And Pain Are Improved For 6 Years After Adolescent Bariatric Surgery, Changchun Xie, Anita P Courcoulas, Carroll M Harmon, Michael A Helmrath, Stephanie Sisley, Marc P Michalsky, Justin R Ryder, Teen‐Longitudinal Assessment Of Bariatric Surgery (Teen‐Labs) Consortium

Faculty, Staff and Students Publications

Objective: The long-term durability of improvements in functional mobility and musculoskeletal pain for adolescents after metabolic and bariatric surgery (MBS) is unknown.

Methods: We used the Teen-Longitudinal Assessment of Bariatric Surgery (Teen-LABS) study to determine the change in mobility and pain among adolescents who underwent MBS. From standardized 400-m walk tests, we analyzed walk time, heart rate (HR) parameters, and musculoskeletal pain.

Results: The mean walk time improved from 383 s (95% CI: 368-399) prior to surgery to 351 s (95% CI: 330-372) by 6 years. The mean resting HR was 90 beats per minute (bpm; 95% CI: 87-93) preoperatively …

Identifying Perceived Barriers In Special Education, Alexus K. Wilson

Electronic Theses and Dissertations

This study explored the lived experiences of teachers and administrators supporting students with disabilities transitioning from special education to general education settings. Grounded in a phenomenological approach within a qualitative research paradigm, the research aimed to uncover how educators perceive and navigate the challenges, barriers, and successes associated with this complex transition process. Data were collected through semistructured interviews with a purposive sample of special education teachers, general education teachers, and school administrators from a small urban district in Texas. The study followed a qualitative methodology that focused on transition theory, and data were analyzed using thematic analysis.The research procedures …

Exploring Effective Institutional Strategies To Retain Adult Learners In Undergraduate Online Programs At A Faith-Based Institution, Fernando Rodriguez-Ramos

Electronic Theses and Dissertations

The aim of this qualitative research study was to identify dynamic advising and high-impact educational practices employed by advisors and faculty that prevent dropout and improve online adult learners’ performance and retention in undergraduate courses at a 4-year private, faith-based institution in the southwestern United States. This study explored the impact of these practices from the students’, faculty’s, and advisors’ perspectives to provide suggestions for improvement that would help retain these students in the classroom and the institution. The problem this study explored was that adult learner dropout from online higher education institutions is a persistent and increasing issue faced …

Leadership And Peer Support Of Surgeons Post-Adverse Event: A Phenomenological Study, Maxine E. Trent

Electronic Theses and Dissertations

Abstract Surgeons are leaving the active practice of surgery and fewer physicians are pursuing surgical training, as a result the United States is predicted to have a shortage of surgeons until 2050. Surgery hosts a multitude of occupational stressors, one of which is interoperative adverse events and the subsequent experience of second victims. The literature indicates surgeons prefer psychological/emotional support from peers after interoperative adverse events. However, best practices for how to deliver peer and leadership support responses when surgeons experience second victims have not been established. This was a phenomenological qualitative study targeting practicing surgeons across the United States. …

Dynamics-Award Reward Balancing And Waypoint Navigation Using Deep Reinforcement Learning, Justin D. Merrick

Theses and Dissertations

The return of Great Power Competition to United States national security strategy necessitates renewed focus on a modern and more lethal military force. The United States Air Force has identified artificial intelligence and autonomy as key to delivering transformational strategic capabilities. This need, paired with the rapid advancement of machine learning, especially deep reinforcement learning (RL), led to questions concerning the optimality of reinforcement learning policies, the use of vehicle dynamics information in the creation of reinforcement learning rewards, and whether research conducted using environments with simple dynamics can be quickly and successfully scaled to more complex, more accurate dynamics, …

Do Resiliency And Coping Skills Moderate The Relationship Between Mood Disorders And Parenting Styles Due To Parental Relationship Distress?, Tiffany Burks

Electronic Theses and Dissertations

Parental relationship dynamics such as intimate partner violence (IPV), interpersonal distress (IPD), and parental alienation (PA) can significantly affect both mental health and parenting practices. This study examined whether personal strengths, specifically resilience and problem-focused coping, could help buffer these negative outcomes. Correlational analyses showed that IPV, IPD, and PA were positively associated with symptoms of depression and anxiety. IPV and PA were also negatively associated with the use of an authoritative parenting style. In contrast, resilience and problem-focused coping were linked to fewer mood-related symptoms and greater use of authoritative parenting. Multiple regression analyses revealed that IPV significantly predicted …

The Ownership Of Mine Tailings, Barry Barton

UBC Law Review

No abstract provided.

Hybrid Computing For Real-Time Model Predictive Control Of A Buck Converter, Grace Paladichuk

Master's Theses

Advancements in power electronics require high switching frequencies which the digital control routines of the systems cannot keep up with. Analog computing is added to digital control systems to prevent bottlenecks and allow real-time implementation. This paper proposes a hybrid computing model predictive control system for a buck converter. The control system implements the gradient dynamics of the optimization function using digital computing, and the gradient dynamics for the penalty function and integrator using analog computing. For the full simulations of the entire system, the PLECS RT Box is used to simulate the controller in real time with a 1 …

Bentonite Erosion And Cation Exchange Effects On Hydraulic Conductivity Of Geosynthetic Clay Liners, Grace Paananen

Master's Theses

Geosynthetic clay liners (GCLs) are used in municipal solid waste landfill (MSW) liner and cover systems as an alternative to thick compacted clay layers. Previous field studies have revealed potential for bentonite erosion in GCLs when subjected to wet-dry cycles that occur when GCLs are placed on slopes, covered with a geomembrane, and left exposed without additional soil cover. A laboratory test program was conducted to quantify the effects of bentonite erosion on hydraulic conductivity of sodium-bentonite geosynthetic clay liners and samples subjected to cation exchange treatment in addition to bentonite erosion. This test program determined what level of bentonite …

International Abolitionist Advocacy: The Rise Of Global Networks To Advance Human Rights And The Promise Of The Worldwide Campaign To Abolish Capital Punishment, John D. Bessler

All Faculty Scholarship

The modern international human rights movement began with the U.N. Charter and the U.N. General Assembly's adoption of the Universal Declaration of Human Rights. Although the movement to abolish the death penalty is rooted in the Enlightenment, global advocacy to halt executions and to abolish capital punishment has accelerated exponentially in recent decades. This Article discusses the origins of global networks to advance human rights and highlights the growing international advocacy, including by nation-states and nongovernmental organizations ("NGOs"), for a worldwide moratorium on executions and to abolish capital punishment altogether. The total number of countries conducting executions in the past …

The Missed Connection: Why Some Travelers Choose Not To Visit Montana, Kika Bradford, Glenna Hartman, Matthew Pettigrew, Melissa Weddell

Institute for Tourism and Recreation Research Publications

Montana attracts millions of visitors drawn by its natural beauty, outdoor recreation, and cultural heritage. A significant portion of these travelers are repeat visitors; however, some travelers visit only once and choose not to return. This study explores what drives that disengagement.

Analysis Study Of Antibacterial Efficacy And Cytotoxicity Of Prepared Metal-Based Nanoparticles Against Streptococcus Mutans: Focus On Gold Nanoparticles, Fattin Fadhil, Azhar Haleem, Abdulrahman Ali, Ahlam Mohammed

Journal of Applied Sciences and Nanotechnology

New approaches have been developed to combat bacterial infections because of the growing threat of antibiotic-resistant bacteria. Gold colloidal nanoparticles and their applications as antibacterial agents have shown promising strategies due to these properties. The properties of nanoparticles, including size, shape, and surface charge, play an essential role in determining antibacterial activity. Pulsed laser ablation in a liquid medium was utilized to produce gold nanoparticles, an environmentally friendly method. Gold NPs were produced in ultrapure water. Experimental research was done to determine the impact of the number of laser pulses on the nanoparticles' size, shape, and concentration. Surface plasmon resonance …

Performance Comparison Of Plasmonic Sensors Via Ion Reduction And Koh Methods, Ruqaya Shlaga, Alwan Alwan, Mohammed Mohammed

Journal of Applied Sciences and Nanotechnology

In this work, several types of plasmonic sensors were prepared by different methods (ion reduction method and wet-chemical KOH route) to detect the ultralow anti-CIPRO concentration using AgNPs/PSi SERS-active substrate with AgNPs concentration. The process was optimized to be very effective in detecting CIPRO and to have a high amplification factor (EF). For the deposition of AgNPs with a concentration of 5×10-3 M and the maximum density of hotspot areas, a nanocrystalline silicon sample prepared by the KOH method and an ion reduction technique before etching was used. We tested an AgNPs/PSi SERS substrate, which showed better performance in detecting …

Antibacterial Performance Of Fe₂O₃ Nanoparticles Synthesized Via Biosynthesis From Chitosan, Faisal Kadhim, Mohamed Bedoui, Ali Aldalawi

Journal of Applied Sciences and Nanotechnology

In this study, Fe₂O₃ nanoparticles were synthesized by a hydrothermal method using chitosan extract and ferric chloride (FeCl₃) as precursor at 150 °C. The hydrothermal approach provides precise control over the size and morphology of the nanoparticles by promoting the decomposition and crystallization of the precursors near their evaporation temperatures. The aim of this study was to quantify the antibacterial activity of the nanoparticles to regulate the production of Fe₂O₃ NPs. The optical and structural properties of Fe₂O₃ nanoparticles (NPs) were investigated and tested using various techniques, including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet-visible (UV-vis) spectroscopy …

Characterization And Water Uptake Of Reinforced Polymer Blend Using Nanoclay And Rock Wool, Rana Salih, Shanaz Ahmad

Journal of Applied Sciences and Nanotechnology

The current work focuses on assessing flexural properties, and water uptake of polymeric composites prepared using various reinforcements. These additives consist of kaolinite nano clays and rock wool (RW). In addition to a polymer blend that consists of epoxy and polyester resins as the matrix. The castings were made using a hand lay-up approach. Nanoclay (NC) was added in weight fractions of 5% and 7%, together with RW added in a volume fraction of 10% as reinforcement. The impact test was employed to decide the optimum mixing ratio of the polymer blend that used as a matrix. From the results …

Analyzing The Dihedral Scattering Component Of P-Band Sar Signals For Trunk Permittivity Estimation – A Concept Study, Anke Fluhrer, Hamed Alemohammad, Thomas Jagdhuber

Geography

A new retrieval method, based on a hybrid decomposition technique and the extended (x-) Fresnel model, is proposed for estimating trunk permittivity from polarimetric P-band SAR observations. P-band SAR observations of NASA's Airborne Microwave Observatory of Subcanopy and Subsurface (AirMOSS) mission campaign are employed to test the proposed retrieval method at individual measuring stations across the U.S. between 2013 and 2015. In order to test the feasibility of the x-Fresnel model for such analyses and its sensitivity to required input parameters, a detailed sensitivity study revealed that at P-band frequencies there is a need to account for scattering losses, phase …

A Concise Formalization Of Partial Falsifiability, Water Logic, And Neither Nor Logic With Neutrosophic Logic, Takaaki Fujita, Florentin Smarandache, Victor Christianto

Neutrosophic Sets and Systems

No abstract provided.

Interval Valued Fermatean Neutrosophic For Analysis Risk Management Of Practical Teaching Quality In University Art And Design Programs, Yu Cai

Neutrosophic Sets and Systems

No abstract provided.

Decomposition Of Neutrosophic Zero-Divisor Graph, Balakrishnan A, Kanchana M, Said Broumi, Thirugnanasambandam K

Neutrosophic Sets and Systems

No abstract provided.