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Articles 40021 - 40050 of 1103635
Full-Text Articles in Entire DC Network
Design And Assembly Of A Low-Cost Active Vacuum Insulation Automatic Control System, Micah Vanderhart
Design And Assembly Of A Low-Cost Active Vacuum Insulation Automatic Control System, Micah Vanderhart
Engineering
Vacuum insulated panels (VIPs) are a developing type of insulation that use an airtight volume evacuated of air to achieve thermal resistivity values as high as ten times that of traditional insulation. One of the areas of use for VIPs is the building industry, but adoption is slow due to issues such as air leaks causing panel degradation over time, panel fragility, and the inability to customize VIP dimensions on-site. These issues have the potential to be solved by utilizing active VIPs, which have a vacuum pump permanently connected to them, allowing them to be periodically evacuated. The purpose of …
Hazard Identification And Analysis For Equipment-Related Fatal Incidents In The Us Underground Coal Mining, Ebenezer Kofi Anthony
Hazard Identification And Analysis For Equipment-Related Fatal Incidents In The Us Underground Coal Mining, Ebenezer Kofi Anthony
Engineering
This study investigates equipment-related fatal incidents in U.S. underground coal mining from 1993 to 2023, analyzing trends, causes, and the effectiveness of safety measures. Using data from the Mine Safety and Health Administration (MSHA), this study examined 205 fatalities linked to continuous miners, shuttle cars, roof bolters, load-haul-dump (LHD) vehicles, longwall systems, and hoisting equipment. A mixed-methods approach combines the quantitative analysis of accident trends with qualitative models, such as Failure Mode and Effects Analysis (FMEA) and Bowtie Analysis. The findings revealed that powered haulage and machinery accidents were the leading causes of fatalities, with mechanical failures (40%), human errors …
Development Of Low-Profile Wideband Microstrip Antennas For Cubesat Phased-Array Applications, Mitchell R. Hay
Development Of Low-Profile Wideband Microstrip Antennas For Cubesat Phased-Array Applications, Mitchell R. Hay
Engineering
CubeSat missions rely heavily on effective communication systems in order to transmit and receive large amounts of data quickly and efficiently. The total throughput is limited by the capacity of the channel - a quantity dependent upon the signal quality and bandwidth of the link. Volume and power constraints on a CubeSat impede overall capacity in a fixed bandwidth channel. Phased-array antennas provide a more power efficient solution to improving signal quality by optimizing the spatial properties of the link, rather than broadcasting higher signal power over a broader area through power amplification alone. In order to take advantage of …
Geotechnical Investigation Of Sand Flow Slides, Haines, Alaska, Christopher Kalev
Geotechnical Investigation Of Sand Flow Slides, Haines, Alaska, Christopher Kalev
Engineering
The Lutak Spur (LS) - a prominent glacio-deltaic landform located near Haines, Alaska - formed during the retreat of the Cordilleran Ice Sheet during the Last Glacial Maximum. This study evaluates its geologic evolution, soil development, and hydrologic-slope stability response to a December 2020 atmospheric river (AR) event, which triggered multiple slope failures. Geologic mapping and interpretation of previous work suggest that the LS formed as an ice contact kame delta at the margin of a retreating valley glacier. Following deglaciation, post glacial isostatic adjustment and sea-level changes exposed the LS surface, allowing for the development of Spodosols with iron-cemented …
Effect Of Climate Change On Arctic Water Quality, Karki Sarthak
Effect Of Climate Change On Arctic Water Quality, Karki Sarthak
Engineering
Climate change is fundamentally altering Arctic hydrological systems, impacting water quality and posing challenges for communities dependent on these vulnerable sources. This study examines water quality trends across three distinct Arctic contexts: (1) Arctic glaciers, (2) the Yukon River Basin (YRB), encompassing a five-year dataset (2019-2023) of dissolved organic carbon (DOC), sulfate, and stable water isotopes (δ2H, δ18O, and d-excess) across varying permafrost regions and seasons, and (3) Shishmaref, Alaska, where a washeteria-based drinking water system is affected by environmental and seasonal changes triggered by climate change and coastal erosion. By addressing both regional hydrology and community-specific challenges, the study …
Developing A Deep Learning Model For Detection Of Spontaneous Combustion In Open Pit Coal Mines, Jatin Juneja
Developing A Deep Learning Model For Detection Of Spontaneous Combustion In Open Pit Coal Mines, Jatin Juneja
Engineering
Spontaneous combustion in coal mines have been a concern for miners all over the world, particularly in China, the USA and India. If allowed to establish over a large area it can become a serious environmental concern. It is important to detect it at initial stages and isolate affected coal seam to quench fire. Monitoring combustion in spoil piles of abandoned and artisanal coal mines is even more difficult due to lack of access to regulating authorities. By using Deep Learning Neural Networks, Convolutional Neural Network models can be trained to detect spontaneous combustion. These scans can be made more …
Performance Analysis Of Pem Fuel Cells Via Puma Optimizer With The Aid Of Practical Verifications, Hossamm Ashraf, Sameh O. Abdellatif, Mahmoud M. Elkholy \, Attia A. El-Fergany
Performance Analysis Of Pem Fuel Cells Via Puma Optimizer With The Aid Of Practical Verifications, Hossamm Ashraf, Sameh O. Abdellatif, Mahmoud M. Elkholy \, Attia A. El-Fergany
Electrical Engineering
This manuscript presents a novel application of the recently developed Puma Optimizer (PO) for identifying the unknown parameters in Mann’s model, which is widely used for characterizing the behavior of Polymer Electrolyte Membrane Fuel Cells (PEMFCs). The proposed PO-based methodology is rigorously evaluated using three test cases. One test case involves experimental I–V measurements under various operating conditions from a commercial PEMFC stack, the Horizon H-100 (100 W), which was assembled and tested in the laboratory. The other two cases are established benchmark PEMFC systems, the Ballard Mark V 5 kW and BCS 500 W units. Comprehensive statistical analyses over …
Unlocking Professional Success: The Power Of Workforce Resilience & Cooperative Extension, Rachel Brauner, Andrew Bronson Crocker, Lakshmi Mahadevan, L. Chris Plein
Unlocking Professional Success: The Power Of Workforce Resilience & Cooperative Extension, Rachel Brauner, Andrew Bronson Crocker, Lakshmi Mahadevan, L. Chris Plein
Journal of Extension
OneOp, a virtual professional development platform dedicated to bolstering the Department of Defense Military Family Readiness System, offers valuable insights into strategies that Cooperative Extension can adopt to enhance workforce resilience. Workforce resilience refers to the capacity of employees to effectively navigate challenging circumstances, cope with stress, adapt to new conditions, and sustain motivation within their work environment. An assessment based on the OneOp webinar series on resiliency delivered during the COVID-19 pandemic identifies best practices that Cooperative Extension can employ to impart essential resilience skills to both individuals and service providers, contributing to a more resilient and adaptable workforce.
Small Meat Processor Needs Are Similar Across Region, Jordan C. Wicks, Alexis Wivell, Thomas Archibald, David Gerrard
Small Meat Processor Needs Are Similar Across Region, Jordan C. Wicks, Alexis Wivell, Thomas Archibald, David Gerrard
Journal of Extension
This needs-based assessment provides insight into the challenges of small meat processors in two regions of the US. On-line surveys were provided to processors and despite regional differences, data show approximately 70% of processors in each state find retention of skilled labor the greatest challenge in maintaining current levels of operation and impede future growth. These findings suggest educational and certification programing may help improve small processor viability and mitigate local food security concerns. Given the disparity in animal production and livestock availability between these diverse states but similarity in responses, we posit this information is translatable across the US.
Transforming Text To Images: Prompt Engineering Principles For Generative Ai Use In Extension, Paul Hill, Xue A. Dong, Aubree L. Miller
Transforming Text To Images: Prompt Engineering Principles For Generative Ai Use In Extension, Paul Hill, Xue A. Dong, Aubree L. Miller
Journal of Extension
Generative AI (GenAI) systems facilitate the creation of visual images by utilizing extensive datasets to interpret text-based instructions. Effective prompt engineering is essential for optimizing the output of AI-generated images. This article examines various GenAI systems and their functionalities, explores text-to-image prompt engineering principles and their application in Extension work, aiming to enhance the effectiveness of visual content creation with respect to educational materials, data visualization, and promotional content. The article also provides guidance and examples to assist Extension professionals in leveraging GenAI for improved communication and engagement. Recommendations include crafting detailed prompts and continuously refining them for desired results, …
Facilitating Farmer-To-Farmer Elearning: An Evaluation Of Climate And Wildfires Online Courses In California, Natalia Pinzon, Caitlin Brimm
Facilitating Farmer-To-Farmer Elearning: An Evaluation Of Climate And Wildfires Online Courses In California, Natalia Pinzon, Caitlin Brimm
Journal of Extension
This study assesses the effectiveness of two online courses tailored for farmers and ranchers in California, with a particular focus on the role of farmer-to-farmer pedagogies. Utilizing live sessions, a social-learning platform, and multimedia content, we draw insights from engagement metrics, lesson and end-of-course survey evaluations, and course outcomes. Key findings highlight the pivotal role of peer interactions, featuring farmers and completion incentives. Based on the findings, we advocate for the integration of farmer-to-farmer education methods within online learning environments to cultivate regional learning networks, and promote the timely exchange and co-creation of agricultural knowledge amid environmental change.
Evaluation Of South Carolina’S Extension And Outreach Agents’ Knowledge Of Harmful Algal Bloom Management And The Impacts Of One-Day Training, George Strickland, Debabrata Sahoo, Michael Vassalos, Heather Nix, Sarah White
Evaluation Of South Carolina’S Extension And Outreach Agents’ Knowledge Of Harmful Algal Bloom Management And The Impacts Of One-Day Training, George Strickland, Debabrata Sahoo, Michael Vassalos, Heather Nix, Sarah White
Journal of Extension
Harmful algal blooms (HABs) impact livestock producers. Most Extension agents have limited knowledge about HAB management. Our study goal was to assess agent readiness and training on HABs. We used data from in-person surveys of South Carolina (SC) Extension personnel. We examined how training influenced HAB knowledge using pre/post-tests. Training improved agent knowledge of HAB management, but water resource agents learned more. The results of this study can be used to identify Extension training shortfalls and drive policy to better prepare agents throughout the state. Further research should involve prioritizing additional extension topics and assessing knowledge in a similar manner.
Using Economic Data To Understand Local Childcare Challenges, Andrew J. Van Leuven, Tessa Conroy
Using Economic Data To Understand Local Childcare Challenges, Andrew J. Van Leuven, Tessa Conroy
Journal of Extension
The childcare sector holds vital implications for community development. Overcoming barriers to access and affordability requires a nuanced understanding of this complex sector, a requirement which is further complicated by limited data availability. This paper reviews key data sources and uses historical business data to explore and analyze trends in childcare establishment availability by region. Supplementing the analysis is a discussion of the implications for community economic development Extension professionals, including the importance of data literacy and the need to support local childcare providers.
The Future Intensification Of Hydrological Extremes And Whiplashes In The Contiguous United States Increase Community Vulnerability, Surendra Maharjan, Wenzhao Li, John D. Bolten, Hesham El-Askary
The Future Intensification Of Hydrological Extremes And Whiplashes In The Contiguous United States Increase Community Vulnerability, Surendra Maharjan, Wenzhao Li, John D. Bolten, Hesham El-Askary
Mathematics, Physics, and Computer Science Faculty Articles and Research
Hydroclimatic whiplash rapid shifts between drought and flood poses growing risks to U.S. communities. Here, we assess historical extremes and future projections using a normalized streamflow metric: the annual mean flow’s deviation from the 1981–2020 average, expressed as a fraction of that average. This metric is applied to United States Geological Survey records and Localized Constructed Analogs downscaled projections under Representative Concentration Pathways 4.5 and 8.5. Results reveal sharp regional disparities, with drought deficits exceeding 300% of normal flow during multi-year droughts. By linking hydrologic outcomes with the Federal Emergency Management Agency’s National Risk Index, we find that counties facing …
Multi-Layered Framework For Llm Hallucination Mitigation In High-Stakes Applications: A Tutorial, Sachin Hiriyanna, Wenbing Zhao
Multi-Layered Framework For Llm Hallucination Mitigation In High-Stakes Applications: A Tutorial, Sachin Hiriyanna, Wenbing Zhao
Electrical and Computer Engineering Faculty Publications
Large language models (LLMs) now match or exceed human performance on many open-ended language tasks, yet they continue to produce fluent but incorrect statements, which is a failure mode widely referred to as hallucination. In low-stakes settings this may be tolerable; in regulated or safety-critical domains such as financial services, compliance review, and client decision support, it is not. Motivated by these realities, we develop an integrated mitigation framework that layers complementary controls rather than relying on any single technique. The framework combines structured prompt design, retrieval-augmented generation (RAG) with verifiable evidence sources, and targeted fine-tuning aligned with domain truth …
The Silent Epidemic: Equipment Maintenance Failures And Patient Outcomes In Ghana's Healthcare System, Ramseyer Adekorang Asamoah, Celene Dzreke, Evans Dzreke, David Kanzin
The Silent Epidemic: Equipment Maintenance Failures And Patient Outcomes In Ghana's Healthcare System, Ramseyer Adekorang Asamoah, Celene Dzreke, Evans Dzreke, David Kanzin
Health & Biomedical Sciences Faculty Publications
Broken tools indicate a broken system. This new study reveals how medical equipment failures destroy Ghana's public hospitals, turning life-saving technologies into silent murderers that disproportionately affect rural areas. Moving beyond technical diagnostics, we study the cascading systemic failures, chronic underfunding, critical staff shortages, and fragmented supply chains that leave 40% of vital equipment, such as ventilators, MRI scanners, and dialysis machines, inoperable at any given time. We quantify the devastating human toll through rigorous mixed-methods analysis of equipment downtime records across ten regional hospitals (2018-2023) and profound narratives from 50 frontline stakeholders, doctors forced to improvise without working incubators, …
Modeling The Effects Of Cyclical Masticatory Forces In A 3d Oral Mucosal Model In Vitro, Samantha Robins, Vehid Salih, Alastair Lomax, Sian Crow, Zoe Brookes, Andrew Foey, Simon A. Whawell
Modeling The Effects Of Cyclical Masticatory Forces In A 3d Oral Mucosal Model In Vitro, Samantha Robins, Vehid Salih, Alastair Lomax, Sian Crow, Zoe Brookes, Andrew Foey, Simon A. Whawell
Peninsula Dental School
This study describes the development of a three-dimensional (3D) oral mucosal model (OMM) to investigate how oral tissues respond to masticatory forces. The OMMs replicated key features of human oral mucosa, such as stratified keratinocyte telomerase-immortalized gingival keratinocytes (TIGK) layers and fibroblast-populated collagen matrices. Cyclical mechanical forces (0-10 N) for 2 h applied to the model caused force-dependent changes in the histological structure, including thinning of the epithelium and collagen matrix and cell displacement at higher forces. Lactate dehydrogenase (LDH) cytotoxicity assays revealed that 10 N forces led to significant cell damage (about 50% cell death) in TIGK monolayers, whereas …
Receiver Function Imaging Of The Mantle Transition Zone Beneath The East Sayan Mountains And Adjacent Area In Central Asia: Implications For Lithospheric Drip And Intraplate Cenozoic Volcanism, Yangyang Liao, Kelly H. Liu, Stephen S. Gao
Receiver Function Imaging Of The Mantle Transition Zone Beneath The East Sayan Mountains And Adjacent Area In Central Asia: Implications For Lithospheric Drip And Intraplate Cenozoic Volcanism, Yangyang Liao, Kelly H. Liu, Stephen S. Gao
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
To provide constraints on the formation mechanisms of intracontinental volcanisms and intriguing lithospheric thickness variations in the East Sayan Mountains and surrounding areas, we stack P-to-s receiver functions to image the 410-km and 660-km discontinuities. Mantle transition zone (MTZ) thickening observed in a continuous area is attributable to ancient slab remnants, and Cenozoic volcanisms in the peripheral area can be explained by slab dehydration. The thinning of the MTZ in the Tuva-Mongolian Massif can be explained by mantle upwelling branches induced by slab subduction. Our results reveal an approximately circular area in the MTZ that is significantly thicker than usual, …
Understanding Salt Stress In Watermelon: Impacts On Plant Performance, Adaptive Solutions, And Future Prospects, Sukhmanjot Kaur, Milena Maria Tomaz De Oliveira, Amita Kaundal
Understanding Salt Stress In Watermelon: Impacts On Plant Performance, Adaptive Solutions, And Future Prospects, Sukhmanjot Kaur, Milena Maria Tomaz De Oliveira, Amita Kaundal
Plants, Soils and Climate Student Research
Soil salinity stress, intensified by extreme weather patterns, significantly threatens global watermelon [Citrullus lanatus (Thunb.) Matsum & Nakai] production. Watermelon, a moderately salt-sensitive crop, exhibits reduced germination, stunted growth, and impaired fruit yield and quality under saline conditions. As freshwater resources decline and agriculture’s dependency on irrigation leads to soil salinization, we need sustainable mitigation strategies for food security. Recent advances highlight the potential of using salt-tolerant rootstocks and breeding salt-resistant watermelon varieties as long-term genetic solutions for salinity. Conversely, agronomic interventions such as drip irrigation and soil amendments provide practical, short-term strategies to mitigate the impact of salt …
The Shorthorn: August 14, 1970
The Shorthorn: August 14, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: July 31, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: June 19, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: July 3, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: May 8, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: May 1, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: April 24, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: April 10, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: March 20, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: April 3, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.
The Shorthorn: March 13, 1970
The Shorthorn Newspaper Collection: 1970s
No abstract provided.