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Articles 14521 - 14550 of 18208
Full-Text Articles in Entire DC Network
Carbon Supported Octahedral Ptni Nanoparticles (Oct-Ptni/C) As A Cathode Catalyst For Proton Exchange Membrane Fuel Cells (Pemfcs) With Improved Activity And Durability, Zi-Wei Feng, Hai-Zhong Chen, Xiao Duan, Ling Tang, Yun-Kun Zhao, Long Huang
Carbon Supported Octahedral Ptni Nanoparticles (Oct-Ptni/C) As A Cathode Catalyst For Proton Exchange Membrane Fuel Cells (Pemfcs) With Improved Activity And Durability, Zi-Wei Feng, Hai-Zhong Chen, Xiao Duan, Ling Tang, Yun-Kun Zhao, Long Huang
Journal of Electrochemistry
Proton exchange membrane fuel cells (PEMFCs) are considered as a promising renewable power source. However, the massive commercial application of PEMFCs has been greatly hindered by their high expense and less-satisfied performance mainly due to the sluggish oxygen reduction reaction (ORR) kinetics even on state-of-the-art Pt catalyst. Octahedral PtNi nanoparticles (oct-PtNi NPs) with excellent ORR activity in a half-cell have been widely studied, while their performance in membrane electrode assembly (MEA) has much less reported. Herein, we investigated the MEA performance using the carbon supported oct-PtNi NPs (oct-PtNi/C) as the cathode catalyst. Under the mild acid washing condition, the surface …
Study Of The Spatial Effect Of Geothermal On Surface Water Quality (Case Study Of Ci Pamatutan Watershed, Parakansalak Sub-District), Fauzan Abdurrahman Masykur, Prasetiawan Pras, M. Rafli Ariq Rianputra, Nesya Desfarivana Umaya, Vanesa Kelly Gabriela, Mangapul Parlindungan Tambunan, Supriatna Supriatna
Study Of The Spatial Effect Of Geothermal On Surface Water Quality (Case Study Of Ci Pamatutan Watershed, Parakansalak Sub-District), Fauzan Abdurrahman Masykur, Prasetiawan Pras, M. Rafli Ariq Rianputra, Nesya Desfarivana Umaya, Vanesa Kelly Gabriela, Mangapul Parlindungan Tambunan, Supriatna Supriatna
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments)
Geothermal plays an important role in affecting surface water quality with both positive and negative effects. It becomes an efficient renewable energy source in generating electricity without producing harmful gases. However, the presence of geothermal affects the quality of surface water in a watershed. This research is focused on the Mount Salak geothermal area which has volcanic and tectonic activity. Parameters such as electrical conductivity (measured in millisiemens/cm) were used to measure the content of minerals and dissolved compounds in the water. Total Dissolved Solids (TDS) measured in ppt is used to quantify dissolved solids, while water acidity (pH) indicates …
Searching For Value In The Wastelands Of Commodity Fetishism, Robert Goldman, Andrew Miller
Searching For Value In The Wastelands Of Commodity Fetishism, Robert Goldman, Andrew Miller
Fast Capitalism
No abstract provided.
Full Issue, Fast Capitalism Editorial Team
Imaginary Fathers, Jonathan Holden
Deletion Practices In The Era Of Permanent Digital Memory, Eric Kula
Deletion Practices In The Era Of Permanent Digital Memory, Eric Kula
Fast Capitalism
No abstract provided.
Needless Necessity: Sameness And Dynamic In Capitalist Society, Marcel Stoetzler
Needless Necessity: Sameness And Dynamic In Capitalist Society, Marcel Stoetzler
Fast Capitalism
No abstract provided.
Driving, Dashboards And Dromology: Analysing 1980s Videogames Using Paul Virilio’S Theory Of Speed, Alex Wade
Driving, Dashboards And Dromology: Analysing 1980s Videogames Using Paul Virilio’S Theory Of Speed, Alex Wade
Fast Capitalism
No abstract provided.
Coming Home After The Surge: Dissecting The Heart Of The Matter Report From The American Academy Of Arts & Sciences, Timothy W. Luke
Coming Home After The Surge: Dissecting The Heart Of The Matter Report From The American Academy Of Arts & Sciences, Timothy W. Luke
Fast Capitalism
No abstract provided.
Full Issue, Fast Capitalism Editorial Team
Algorithmic Capitalism In The Epoch Of Digital Reason, Michael A. Peters
Algorithmic Capitalism In The Epoch Of Digital Reason, Michael A. Peters
Fast Capitalism
No abstract provided.
(Auto)Biography And Social Theory: A Perspective On The Life And Work Of Ben Agger (1953-2015), Lukas Szrot
(Auto)Biography And Social Theory: A Perspective On The Life And Work Of Ben Agger (1953-2015), Lukas Szrot
Fast Capitalism
No abstract provided.
Land Use And Sovereignty Along The Catawba River, Thomas C. Brugh, Lucile C. Rencher
Land Use And Sovereignty Along The Catawba River, Thomas C. Brugh, Lucile C. Rencher
Student Scholarship
This document-based case study explains how land-use change along the Catawba River Corridor (Lancaster and York Counties, South Carolina) has been produced through the interaction of property rights (dominium) and rule-setting authority (imperium), showing why sovereignty continues to shape development even after land disputes appear “settled.” Through analyzing legal records (Treaty of Nation Ford, the 1959 Catawba Division of Assets Act, the 1986 Supreme Court timing decision, and the 1993 Settlement Act), planning documents, parcel records, and field observations, we trace how shifting jurisdiction and title certainty structured what kinds of land uses were possible and when. We argue that …
Analysis Of Activated Carbon Fiber (Acf) As Particulate Filtration And Volatile Organic Compound (Voc) Media For The Development Of A Dual-Air Purifying Facepiece Respirator, Brie Mcmahan
ETDs from 2020-2029
Exposure to particulate matter (PM) and volatile organic compounds (VOCs) in occupational or public settings poses adverse health outcomes such as respiratory, cardiovascular, reproductive, neurological, carcinogenic morbidity and mortality. Many occupational settings expose workers to PM and VOC concurrently, yet most commercially available respirators are designed to address either particulates or vapors alone. This includes air-purifying respirators (APRs), powered air-purifying respirators (PAPRs), and filtering facepiece respirators (FFRs) with nuisance-level vapor protection, often limited by bulk, discomfort, high pressure drop, and misuse. We identified a need for alternative dual-exposure media and a respiratory protection device that is lighter, and more comfortable …
Untold Journeys: A Case Study Of Attrition In Alabama’S Public School Teaching Workforce, Jessica Claborn Rose
Untold Journeys: A Case Study Of Attrition In Alabama’S Public School Teaching Workforce, Jessica Claborn Rose
ETDs from 2020-2029
This exploratory multiple-case study investigates the crisis of teacher attrition among early childhood and elementary education graduates from Alabama-based teacher education programs (TEPs) who either avoided public-school teaching or left the profession within three years. The research, guided by Bandura’s social cognitive theory (SCT) and Maslow’s human motivation theory, utilized a qualitative design involving individual interviews with ten teacher leavers (TLs), and five TEP faculty members. The findings reveal that attrition is a multi-faceted crisis rooted in systemic failures, coalescing around two overarching factors: effectiveness of support systems and a collection of barriers. Consistent with SCT, low self-efficacy, resulting from …
William Richter V. Duquesne University Of The Holy Spirit
William Richter V. Duquesne University Of The Holy Spirit
2026 Decisions
USDC for the Western District of Pennsylvania
Eyes Like Mine, Korey E. Crawford
Eyes Like Mine, Korey E. Crawford
Stimulus: A Medical Humanities Journal
No abstract provided.
Iterative Data Augmentation For Enhancing Deep Learning Performance With Limited Training Data, Avinash Singh
Iterative Data Augmentation For Enhancing Deep Learning Performance With Limited Training Data, Avinash Singh
ETDs from 2020-2029
Deep learning models have demonstrated impressive performance across different domains; however, their effectiveness heavily depends on large, well annotated datasets. In practice, data are often limited in size, leading to overfitting, poor generalization, and degraded model robustness and performance. Moreover, conventional augmentation techniques are typically static in nature, lack adaptability during training, and can produce geometrically inconsistent or unrealistic mixed images. This dissertation addresses three major challenges in data augmentation and model generalization: (1) the scarcity of labeled data and limited dataset size, (2) the absence of adaptive mechanisms for dynamically adjusting learning parameters during training, and (3) the creation …
Handling Missing Data In Copd Research, Chia-Ying Chiu
Handling Missing Data In Copd Research, Chia-Ying Chiu
ETDs from 2020-2029
Chronic Obstructive Pulmonary Disease (COPD) remains a major global health concern and one of the leading causes of death in the United States, affecting approximately 4.6% of adults and reaching a prevalence of 9.4% in Alabama according to 2024 National Health Interview Survey. The disease imposes a substantial burden on quality of life and healthcare costs and contributes to increased disability-adjusted life years and years of life lost, as highlighted by the 2022 Lancet Commission report. Despite its im-pact, COPD is frequently diagnosed only after irreversible lung damage has occurred, largely due to under-recognized symptoms and limited diagnostic tools. Early …
Development Of Salinomycin Analogs As Potential Anti-Cancer Agents, Pavan Goud Juluri
Development Of Salinomycin Analogs As Potential Anti-Cancer Agents, Pavan Goud Juluri
Theses and Dissertations
Salinomycin, a poly-ionophore antibiotic originally isolated from Streptomyces albus, exhibits antimicrobial activity against Gram-positive bacteria. Over the years Salinomycin has been studied in the effects it has on cancer, specifically cancer stem cells. Poly(ADP-ribose) polymerase (PARP) is an enzyme involved in DNA repair. Inhibiting PARP has been explored as a strategy in cancer treatment, particularly in cancers with defective DNA repair mechanisms, such as those with BRCA mutations. The benzo-thiazoles, and -imidazoles are identified as inhibitor scaffolds, which compete with nicotinamide in the binding pocket of human poly- and mono-ADP-ribosylating enzymes. Benzothiazole, and benzimidazole based compounds particularly with modification at …
Ultrafast Terahertz Spectroscopy And The Suppression Of Superconductivity In Strained Iron Selenide Below 1 Kelvin, Tracy Glen Hastings
Ultrafast Terahertz Spectroscopy And The Suppression Of Superconductivity In Strained Iron Selenide Below 1 Kelvin, Tracy Glen Hastings
ETDs from 2020-2029
We report on terahertz time-domain spectroscopy measurements of iron selenide thin films of various thicknesses grown on a magnesium oxide substrate, focusing on the frequency-dependent complex conductivity in the range of 0.25 - 7 THz. By an- alyzing films with and without an approximately 100 nm thick Se capping layer, we examined the role of oxidation in the suppression of superconductivity. X-ray photo- electron spectroscopy data confirmed that oxidation was effectively mitigated, yet the films exhibited insulating behavior down to 200 mK, a temperature range that has not been extensively studied in this system. Our results indicate that the suppression …
Recurrence Of Locally Perturbed Random Walks With Long Jumps, Tamer Oraby, András Telcs
Recurrence Of Locally Perturbed Random Walks With Long Jumps, Tamer Oraby, András Telcs
School of Mathematical & Statistical Sciences Faculty Publications
We study the effect of local perturbations on the recurrence of random walks with long jumps. Such walks serve as discrete models for infinite-horizon Lorentz processes, in which a particle can take arbitrarily long steps in specific directions. Motivated by a question of Sinai in the finite-horizon case and its extension by Szász to the infinite-horizon setting, we give recurrence and transience criteria for long-jump walks on Z2 and certain classes of graphs, and we prove that local perturbations in a bounded region do not change the recurrence property. Our proofs combine the Markov chain approach with the electrical network …
Investigation Of The Phase Space Of Tungsten Oxides Nanostructures Via Resistive Hot Wire Oxidation For Efficient Electrochemical Energy Storage And Conversion Applications., Krishna Kc
Theses and Dissertations
The synthesis of tungsten oxide (WO3−δ, 0 ≤ δ ≤ 1) nanostructures with controlled phase and morphology remains a significant challenge, particularly for applications in energy conversion and storage. This dissertation presents an eco-friendly and time-efficient method for synthesizing tungsten oxide nanostructures with tailored stoichiometry and crystal phases through the Resistive Hot Wire Oxidation (RHWO) technique. In this method, a tungsten wire is heated via resistive heating in an oxygen environment, and by precisely controlling the growth conditions, we successfully synthesized WO2.72, WO2.76, WO2.80, WO2.83, WO2.90, and WO2.98 phases with controlled morphologies using simple instrumentation. This approach eliminates the need …
Hybrid Quantum-Classical Optimization Of The Resource Scheduling Problem, Tyler Christeson, Md Habib Ullah, Ali Arabnya, Amin Khodaei, Rui Fan
Hybrid Quantum-Classical Optimization Of The Resource Scheduling Problem, Tyler Christeson, Md Habib Ullah, Ali Arabnya, Amin Khodaei, Rui Fan
Electrical and Computer Engineering: Faculty Scholarship
Resource scheduling is critical in many industries, especially in power systems where the Unit Commitment (UC) problem determines the on/off status and output levels of generators under physical and economic constraints. Traditional exact methods, such as Branch-and-Bound, Branch-and-Cut, dynamic programming and mixed-integer linear programming (MILP), remain the backbone of UC solution techniques, but they often rely on linear approximations or exhaustive search, leading to high computational burdens as system size grows. Metaheuristic approaches, such as genetic algorithms, particle swarm optimization, and other evolutionary methods, have been explored to mitigate this complexity; however, they typically lack optimality guarantees, exhibit sensitivity to …
Differentiation In The Human Urothelia Is Defined By Distinct Alternative Polyadenylation, Ninh B Le, Surbhi Sona, Briana Santo, Yi Zhang, Rosie Ou, R Allen Schweickart, Veena Kochat, William I Padron, Kunal Rai, Shih-Han Lee, Joo Mi Yi, Oliver Wessely, Byron H Lee, Angela H Ting
Differentiation In The Human Urothelia Is Defined By Distinct Alternative Polyadenylation, Ninh B Le, Surbhi Sona, Briana Santo, Yi Zhang, Rosie Ou, R Allen Schweickart, Veena Kochat, William I Padron, Kunal Rai, Shih-Han Lee, Joo Mi Yi, Oliver Wessely, Byron H Lee, Angela H Ting
Faculty, Staff and Student Publications
Distinct epithelial cell states arise during differentiation, but mechanisms generating transcriptomic diversity among them remain poorly defined. The human ureter urothelium contains basal progenitor, intermediate cells, and terminally differentiated umbrella cells. Prior single-cell RNA sequencing revealed similar global gene expression profiles across these states, raising the question of how distinct identities emerge. Here, we show that alternative cleavage and polyadenylation (APA) introduces a major layer of transcriptomic diversity during urothelial differentiation, largely independent of changes in mRNA levels. Analysis of 13,544 urothelial cells identified hundreds of differentiation-associated APA events. Single-cell imaging revealed spatially specific APA patterns, and reporter assays demonstrated …
Differentiation In The Human Urothelia Is Defined By Distinct Alternative Polyadenylation, Ninh B Le, Surbhi Sona, Briana Santo, Yi Zhang, Rosie Ou, R Allen Schweickart, Veena Kochat, William I Padron, Kunal Rai, Shih-Han Lee, Joo Mi Yi, Oliver Wessely, Byron H Lee, Angela H Ting
Differentiation In The Human Urothelia Is Defined By Distinct Alternative Polyadenylation, Ninh B Le, Surbhi Sona, Briana Santo, Yi Zhang, Rosie Ou, R Allen Schweickart, Veena Kochat, William I Padron, Kunal Rai, Shih-Han Lee, Joo Mi Yi, Oliver Wessely, Byron H Lee, Angela H Ting
Faculty, Staff and Student Publications
Distinct epithelial cell states arise during differentiation, but mechanisms generating transcriptomic diversity among them remain poorly defined. The human ureter urothelium contains basal progenitor, intermediate cells, and terminally differentiated umbrella cells. Prior single-cell RNA sequencing revealed similar global gene expression profiles across these states, raising the question of how distinct identities emerge. Here, we show that alternative cleavage and polyadenylation (APA) introduces a major layer of transcriptomic diversity during urothelial differentiation, largely independent of changes in mRNA levels. Analysis of 13,544 urothelial cells identified hundreds of differentiation-associated APA events. Single-cell imaging revealed spatially specific APA patterns, and reporter assays demonstrated …
Clustering Of Temporal And Visual Data: Recent Advancements, Priyanka Mudgal
Clustering Of Temporal And Visual Data: Recent Advancements, Priyanka Mudgal
Computer Science Faculty Publications and Presentations
Clustering plays a central role in uncovering latent structure within both temporal and visual data. It enables critical insights in various domains including healthcare, finance, surveillance, autonomous systems, and many more. With the growing volume and complexity of time-series and image-based datasets, there is an increasing demand for robust, flexible, and scalable clustering algorithms. Although these modalities differ—time-series being inherently sequential and vision data being spatial—they exhibit common challenges such as high dimensionality, noise, variability in alignment and scale, and the need for interpretable groupings. This survey presents a comprehensive review of recent advancements in clustering methods that are adaptable …
Mapping Post-Rainfall Recovery In Arid Regions Using A Hierarchical U-Net, Xin Hong
Mapping Post-Rainfall Recovery In Arid Regions Using A Hierarchical U-Net, Xin Hong
All Works
The United Arab Emirates (UAE) experienced an extreme rainfall event between April 15 and 17, 2024, and that resulted in severe flooding in its coastal regions. Dubai was among the most affected regions. This study applies a hierarchical deep learning model on PlanetScope imagery to detect flood inundation, quantify flood extent by land cover, and examine short-term recovery dynamics. While earlier work detailed the methodological development of a hierarchical U-Net model (Hong et al., in press), here we emphasize its application for monitoring resilience trajectories in an arid urban environment. Results show that approximately 22 km2 of land was …
Mapping Urban Vegetation Changes Using Planetscope Imagery And Gis: A Case Study Of The 2024 Dubai Flood, Sumayya Almansoori, Xin Hong
Mapping Urban Vegetation Changes Using Planetscope Imagery And Gis: A Case Study Of The 2024 Dubai Flood, Sumayya Almansoori, Xin Hong
All Works
In April 2024, unexpected heavy rainfall triggered one of the most severe flooding events in Dubai’s recent history, causing widespread concern for urban infrastructure and green spaces. This study evaluates the flood’s impact on urban vegetation in South Dubai using high-resolution PlanetScope satellite imagery and the Normalized Difference Vegetation Index (NDVI). Vegetation conditions before and after the flood (April 14 and April 18–19, 2024) were quantified and compared using NDVI analysis within QGIS to assess changes in vegetation health and coverage. Results indicate significant declines in vegetation health in areas dominated by intensive turf management, such as Damac Hills and …
Generative Ai Use And Self-Learning In Higher Education: The Role Of Learning Difficulties, Dana Saleh, Areej Elsayary
Generative Ai Use And Self-Learning In Higher Education: The Role Of Learning Difficulties, Dana Saleh, Areej Elsayary
All Works
The rapid development of GenAI tools and their adoption in education have shown promising potential to personalize learning experiences. However, their effectiveness is influenced by factors such as familiarity, frequency of use, and the impact on self-learning. This study investigates the undergraduate students' familiarity with Generative AI (GenAI) tools, their frequency of use, and the perceived impact of GenAI on self-learning, with particular consideration of differences between students with and without learning difficulties. Prompt engineering is also included as a secondary aspect of students' GenAI experience. The research employed a quantitative survey design, utilizing validated scales to measure familiarity, usage …