Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Nebraska - Lincoln (5346)
- China Coal Technology and Engineering Group (CCTEG) (1719)
- Utah State University (634)
- Department of Primary Industries and Regional Development, Western Australia (573)
- University of Nevada, Las Vegas (510)
-
- City University of New York (CUNY) (507)
- Portland State University (482)
- University of Arkansas, Fayetteville (437)
- International Centre of Insect Physiology and Ecology (351)
- Edith Cowan University (329)
- SIT Graduate Institute/SIT Study Abroad (319)
- University of Texas Rio Grande Valley (319)
- Old Dominion University (271)
- Chulalongkorn University (257)
- University of Colorado Law School (254)
- University of Kentucky (244)
- Clemson University (240)
- Chinese Academy of Sciences (237)
- Chapman University (224)
- Louisiana State University (210)
- Montclair State University (210)
- Central Mining Institute (198)
- University of South Florida (192)
- Walden University (189)
- Singapore Management University (179)
- South Dakota State University (162)
- Western Kentucky University (124)
- Cal Poly Humboldt (101)
- California Polytechnic State University, San Luis Obispo (99)
- Gettysburg College (92)
- Keyword
-
- Climate change (535)
- Sustainability (393)
- Western Australia (355)
- 2014 International Conference on Hydroinformatics HIC (293)
- Water quality (226)
-
- Conservation (211)
- United States (191)
- Remote sensing (177)
- Invasive species (173)
- Drought (171)
- California (152)
- Environment (152)
- Agriculture (135)
- Groundwater (129)
- Biodiversity (125)
- Water (116)
- Management (113)
- Ecology (112)
- Nebraska (112)
- Climate (103)
- GIS (101)
- Numerical simulation (93)
- Pollution (92)
- Outdoor education (83)
- Sustainable development (82)
- Energy (81)
- Hydrology (80)
- Restoration (80)
- Wetlands (80)
- Machine learning (79)
- Publication Year
- Publication
-
- Coal Geology & Exploration (1719)
- School of Natural Resources: Faculty Publications (1091)
- United States Department of Agriculture Wildlife Services: Staff Publications (1039)
- All Peer-Reviewed Publications (351)
- Journal of the Department of Agriculture, Western Australia, Series 4 (307)
-
- Independent Study Project (ISP) Collection (306)
- The Prairie Naturalist (303)
- United States Geological Survey: Staff Publications (296)
- International Conference on Hydroinformatics (293)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (248)
- United States Department of Commerce: Staff Publications (246)
- Bulletin of Chinese Academy of Sciences (Chinese Version) (237)
- Applied Environmental Research (209)
- Journal of Sustainable Mining (198)
- Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications (190)
- Walden Dissertations and Doctoral Studies (189)
- Department of Environmental Studies: Undergraduate Student Theses (172)
- Electronic Theses and Dissertations (161)
- Environmental Science and Management Faculty Publications and Presentations (161)
- Human–Wildlife Interactions (157)
- Research outputs 2022 to 2026 (148)
- Theses and Dissertations (142)
- Graduate Theses and Dissertations (138)
- School of Natural Resources: Dissertations, Theses, and Student Research (138)
- Publications and Research (135)
- Water Current Newsletter (131)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (125)
- LSU Master's Theses (116)
- Research outputs 2014 to 2021 (113)
- Joint Fire Science Program Research Project Reports (109)
- Publication Type
- File Type
Articles 331 - 360 of 19868
Full-Text Articles in Entire DC Network
Development Path And Prospects Of Technologies For Detecting Hidden Hazards In Coalfield Fire Zones, Deng Jun, Wang Jinrui, Ren Shuaijing, Song Zeyang, Wang Caiping, Li Yaqing, Lu Junhui, Qu Gaoyang
Development Path And Prospects Of Technologies For Detecting Hidden Hazards In Coalfield Fire Zones, Deng Jun, Wang Jinrui, Ren Shuaijing, Song Zeyang, Wang Caiping, Li Yaqing, Lu Junhui, Qu Gaoyang
Coal Geology & Exploration
Background Hidden hazards in coalfield fire zones are characterized by limited detectability, rapid evolution, and multi-hazard coupling, posing major challenges to the safe coal mining and related ecological restoration. Methods This study aims to achieve the fine-scale identification and risk control of hidden hazards in coalfield fire zones. Based on a systematic review of the genetic mechanisms and spatial distribution patterns of coalfield fire zones, this study summarizes the characteristics of three primary fire zone types: outcrop/surface fire zones, shallowly buried fire zones, and deeply buried underground burnt-out areas and fire zones within old coal pits. Multi-dimensional hazards caused by …
Stoker-Fired Laboratory Boiler As A Tool For Optimising The Solid Fuel Combustion Process, Przemysław Rompalski, Justyna Guzy-Proc, Mariusz Kieczek
Stoker-Fired Laboratory Boiler As A Tool For Optimising The Solid Fuel Combustion Process, Przemysław Rompalski, Justyna Guzy-Proc, Mariusz Kieczek
Journal of Sustainable Mining
This paper presents the results of quality testing performed on a stoker-fired laboratory boiler to present the technical potential of the boiler as a tool for optimising the combustion process of prepared solid fuels (granulate, energy blend) in the context of current demands related to the decarbonisation policy. The comprehensive testing of such fuels at a laboratory scale makes it possible to gain deep insights into the quality parameters of the fuel, flue gas and combustion waste, as well as to determine the combustion process parameters before the fuel is introduced for combustion in broader power engineering and household boilers. …
Productive Armature, Gabriel Ofem Peter
Productive Armature, Gabriel Ofem Peter
Masters Theses
What if water was all you had, what if your only source of survival was a body of water? I shudder to think that some people get to be put in this situation in the world we live in. As I understand the importance of water to survival, it is obvious that water can be the only lifeline of survival for a community. This is the experience for residents of Makoko, Lagos. Their survival depends on the Lagos Lagoon, a large body of water flowing in from the Atlantic Ocean. This research looks beyond the surface of what this community …
Innovation Strategies For Small And Medium-Sized Construction Companies In Nigeria, Olabode Akinkunmi Akindele
Innovation Strategies For Small And Medium-Sized Construction Companies In Nigeria, Olabode Akinkunmi Akindele
Walden Dissertations and Doctoral Studies
No abstract provided.
Do Cover Crops Influence Beneficial And Herbivorous Arthropod Communities Across Growing Seasons?, Adegboyega Fajemisin, Satinderpal Kaur, Alejandro Vasquez, Alexis Racelis, Rupesh R. Kariyat
Do Cover Crops Influence Beneficial And Herbivorous Arthropod Communities Across Growing Seasons?, Adegboyega Fajemisin, Satinderpal Kaur, Alejandro Vasquez, Alexis Racelis, Rupesh R. Kariyat
School of Earth, Environmental, & Marine Sciences Faculty Publications
Cover crops provide multiple ecosystem services in agriculture, yet their influence on arthropod communities remains poorly understood, especially in commercial farming. Despite their potential benefits, it remains unexplored how cover crops affect arthropod community dynamics across multiple growing seasons. We conducted a two-year study across three commercial farms in the Lower Rio Grande Valley, Texas, to examine how cover crops influence arthropod community composition and abundance, whether beneficial arthropods (natural enemies and pollinators) persist into cash-crop phases, and how cover crops affect natural enemy–herbivore relationships. We compared arthropod communities between cover-crop treatments and control plots and tracked responses through subsequent …
Unquaint Pigs’ Stakeholder Perspectives On Wild Swine In Central Western Florida, Tyler Koerner
Unquaint Pigs’ Stakeholder Perspectives On Wild Swine In Central Western Florida, Tyler Koerner
USF Tampa Graduate Theses and Dissertations
The Anthropocene presents important questions for how to address the continuous transferal of new species into new spaces and the cascading impacts of environmental transformations. Novel ecosystems present one such outline for conservation that acknowledges the modification of historic ecosystems and the social entanglements that arrive with new species. I argue that novel ecosystems can benefit from further anthropological integrations that aid in describing the entanglements of introduced species and the pursuit of best managerial outcomes. For wild swine in Florida, the adoption of a novel approach is especially relevant because of entanglements with historic and modern Floridian stakeholders and …
Shelters In Motion, Erin Nicole Vallido Trasmano
Shelters In Motion, Erin Nicole Vallido Trasmano
Hospitality Design Graduate Student Capstones
Shelters in Motion is a modular temporary shelter system for festival and outdoor events that replaces disposable tents with reusable, durable design. Overall reducing environmental impact while significantly improving comfort and user experience.
Assessment Of Local Ecological Knowledge, Oyster Predation, And Habitat Function To Improve Management Of Nearshore Habitats, Cynthia Evelyn Marie Lupton
Assessment Of Local Ecological Knowledge, Oyster Predation, And Habitat Function To Improve Management Of Nearshore Habitats, Cynthia Evelyn Marie Lupton
Theses and Dissertations
Coastal ecosystems along the northern Gulf of Mexico are ecologically and economically vital yet increasingly threatened by environmental change, habitat degradation, and knowledge gaps that complicate restoration and management efforts. This dissertation integrates social and ecological approaches to improve understanding of predator dynamics, stakeholder perceptions, and habitat function related to nearshore habitats. Thereby, providing information that can inform adaptive management and restoration in the region through addressing three overarching objectives: 1) evaluate stakeholder perceptions of oyster (Crassostrea virginica) predation and management practices; 2) quantify environmental and habitat factors influencing oyster drill (Stramonita haemastoma complex) abundance; and, 3) assess the influence …
Thermal Physiological Ecology Of The Relict Leopard Frog At Hot And Cold Springs, Robert P. Pelletier Iii
Thermal Physiological Ecology Of The Relict Leopard Frog At Hot And Cold Springs, Robert P. Pelletier Iii
UNLV Theses, Dissertations, Professional Papers, and Capstones
The relict leopard frog (Rana onca) once ranged across drainages in southern Nevada, northwestern Arizona, and southwestern Utah. Following a decline, the species only persisted in a few geothermally influenced hot springs, which led to the perspective that hot springs were high-quality habitat. Rana onca has been under intensive, multiagency management and the species has been translocated to establish additional populations, including at cold-water sites. Three research studies are presented into the thermal physiological ecology of R. onca with the aim of informing conservation strategy. The research was focused at a thermally influenced hot spring and a cold-water spring to …
Unknowing Sacrifices: Public Health And Radiation Illness In New Mexico And Nevada, 1940s-1960s, Beatriz Avila-Marquez
Unknowing Sacrifices: Public Health And Radiation Illness In New Mexico And Nevada, 1940s-1960s, Beatriz Avila-Marquez
UNLV Theses, Dissertations, Professional Papers, and Capstones
The detonation of the first atomic bomb in the early morning of July 16, 1945, in New Mexico welcomed the atomic age that forever changed the world. After that day, thousands of lives were lost due to nuclear weapons, and hundreds of thousands more continued to suffer from the effects of atomic testing. The Atomic Energy Commission, fueled by the arms race of the Cold War, chose Nevada to continue the United States’ nuclear weapons testing. Knowledge of the dangers of radiation exposure, the effects of radiation, and techniques to prevent exposure are now available in part due to the …
Local And Indigenous Knowledge, Innovation, And Sustainable Development: Creating Sustainable Futures Amidst Crisis Conditions At The Community Level, Carlos Andrés Arias
Local And Indigenous Knowledge, Innovation, And Sustainable Development: Creating Sustainable Futures Amidst Crisis Conditions At The Community Level, Carlos Andrés Arias
Dissertations and Theses
In 1987, the Brundtland Commission's Our Common Future (1987) made clear the need to reject longstanding development processes and focus on sustainable development. The Commission stressed that actual sustainable development integrates three elements: social development, economic development, and environmental protection. Though developed nations have achieved economic growth through conventional and extractive development practices, these practices have intensified natural disasters driven by climate change, increased food insecurity, and deepened poverty. This has acutely impacted Indigenous and local communities, many of whom face crisis conditions, such as war, terrorism, civil disorder, and their aftermath. Even so, many of these communities successfully implement …
Urban Conflagrations: Structural Ash And Soil Metal(Loid) Contamination After California’S Eaton And Palisades Fires, S. Anselme Dossou, Leon Kelly, P. Louis Lu, Robin Jones, Oliver O'Donnell, Justin St. P. Walsh, Daniel D. Richter
Urban Conflagrations: Structural Ash And Soil Metal(Loid) Contamination After California’S Eaton And Palisades Fires, S. Anselme Dossou, Leon Kelly, P. Louis Lu, Robin Jones, Oliver O'Donnell, Justin St. P. Walsh, Daniel D. Richter
Art Faculty Articles and Research
In the weeks after California’s Eaton-Palisades wildfires, structural ash of burned homes and soils from yards and curbsides were sampled for analysis of Pb, As, and eight metals from 32 burned residences. About six months after fires and after US Army Corps of Engineers’ Phase 2 cleanups removed 15 cm from structural ash footprints, 17 properties were resampled within about a meter of original sampling sites. Concentrations of metal(oid)s in structural ash and residential soils varied between and within properties with significant spatial and temporal patterns. Lead concentrations were highest in structural ash and soil of yards of select pre-1970s …
Oregon State Rank Assessment For Wiens' Dwarf Mistletoe (Arceuthobium Abietinum Ssp. Wiensii), Lindsey K. Wise
Oregon State Rank Assessment For Wiens' Dwarf Mistletoe (Arceuthobium Abietinum Ssp. Wiensii), Lindsey K. Wise
Institute for Natural Resources Publications
Oregon state conservation status assessment for Wiens' dwarf mistletoe (Arceuthobium abietinum ssp. wiensii) using NatureServe methodology, 2026.
Preliminary Geologic Assessment And Pfas Occurrence In Western Cheney, Washington, Sydney Frandsen
Preliminary Geologic Assessment And Pfas Occurrence In Western Cheney, Washington, Sydney Frandsen
2026 Symposium
In 2021 Cheney Water Well #5 was closed due to toxic per- and polyfluoroalkyl substances (PFAS) levels above the current State Action Limits and the National Drinking Water Protection Act (https://www.cityofcheney.org/207/Water), which is a concern since PFAS has been associated to types of cancer, birth defects, and other negative human and environmental health concerns (https://doh.wa.gov/communityand-environment/contaminants/pfas). The City of Cheney also tested two downgradient deep-groundwater-wells (Cheney wells #6 and 7) and halted investigation due to the wells being below state and federal drinking water standards. However, a local resident’s shallow groundwater well tested to be above federal and state levels of …
Karstic Cavities Underground Investigation: Gpr And Geotechnical Data Correlation, Mehrez Jamei, Mabrouk Abdelkader, Anwar Ahmed, Yahya Alassaf
Karstic Cavities Underground Investigation: Gpr And Geotechnical Data Correlation, Mehrez Jamei, Mabrouk Abdelkader, Anwar Ahmed, Yahya Alassaf
Journal of Sustainable Mining
This paper focuses on the methodology involving ground penetration radar (GPR) for detecting and localizing random cavities in underground limestone soil, in conjunction with geotechnical data. A GPR survey was conducted alongside field and laboratory geotechnical tests at a field where mining activities are now promoted (Saudi Arabia Northern Borders Province). The paper presents correlations between the instantaneous amplitude of the reflected electromagnetic (EM) waves and rock quantification distributed (RQD), recovery rock parameter (REC), and uniaxial compressive strength (UCS). The GPR investigation proved to be an efficient nondestructive geophysical method for determining: 1) the …
Climate Impacts Apple Pollination, Yield And Economic Outcomes Of Farmers, Clémence Riva, Stella Gachoki, Noureddine Adjlane, Danilo Bevk, Yamina Haider, Fani Hatjina, Šimun Kolega, Marin Kovačić, Ioannis Manthos, Zlatko Puškadija, Thomas Sotiropoulos, Bojan Stipešević, Fabrice Requier
Climate Impacts Apple Pollination, Yield And Economic Outcomes Of Farmers, Clémence Riva, Stella Gachoki, Noureddine Adjlane, Danilo Bevk, Yamina Haider, Fani Hatjina, Šimun Kolega, Marin Kovačić, Ioannis Manthos, Zlatko Puškadija, Thomas Sotiropoulos, Bojan Stipešević, Fabrice Requier
All Peer-Reviewed Publications
Animal-mediated pollination is crucial to global food production but is increasingly threatened by environmental degradation, habitat loss and climate change. The extent to which temperature affects pollination services and crop yields is poorly understood. Using standardised monitoring in 33 apple orchards across Europe and Northern Africa over two years, this study assessed how ambient temperature affects flower visitors, fruit set, fruit quality and economic outcomes. Observation-time warm temperatures increased pollinator abundance, particularly of honey bees, while long-term mean annual temperatures enhanced pollination services for apple weight. Apple yield and the economic benefits to farmers increase with temperature, while the role …
Determining Cave Presence And Diet Variation Of The Ozark Big-Eared Bat (Corynorhinus Townsendii Ingens) From Guano Dna, Lark E. Sybrant
Determining Cave Presence And Diet Variation Of The Ozark Big-Eared Bat (Corynorhinus Townsendii Ingens) From Guano Dna, Lark E. Sybrant
ATU Theses and Dissertations 2021 - Present
The Ozark big-eared bat (Corynorhinus townsendii ingens; OBEB) is federally endangered in Arkansas, where it persists in a few small, geographically restricted populations within the Ozark National Forest. Although the region contains many caves that appear suitable for OBEB, expanded survey efforts are needed to locate additional roost sites for monitoring and protection. Effective conservation also requires a clear understanding of their distribution and diet. Traditional cave surveys can be disruptive and often miss cryptic species, and earlier diet studies based on manually sorting prey remains provided only coarse taxonomic resolution and overlooked soft‑bodied insects. To address these …
Secondhand Or Second-Class? Environmental Injustice In Global Textile Waste Trade, Wendy S. Escalante
Secondhand Or Second-Class? Environmental Injustice In Global Textile Waste Trade, Wendy S. Escalante
Student Theses 2015-Present
This paper addresses the issue of textile waste dumping, specifically how secondhand clothing exports from the Global North create environmental, social, and public health burdens in the Global South. The study focuses on case studies in Chile’s Atacama Desert, where shipments of used clothing overwhelm local waste infrastructures and worsen patterns of environmental injustice. Chapter 1 describes the global flows of textile waste, including trade volumes, landfill accumulation, and the impacts of discarded clothing on ecosystem services such as clean water, fertile soils, and breathable air, alongside health risks from microplastic pollution, toxic runoff, and respiratory hazards from textile fires. …
Identifying The Cultural Significance Behind Local Study Sites Used By Marine Scientists, Mackenzie Anonick
Identifying The Cultural Significance Behind Local Study Sites Used By Marine Scientists, Mackenzie Anonick
Honors Theses
This project brings awareness to the cultural significance of places that scientists (specifically marine scientists associated with CCU) study and do field work at. It is important to be respectful of places you work in and understand what environment and land you are working with. It is also important to know your privilege when working in areas of less privilege. For example, CCU students travel to Bucksport on field trips, and the majority of them are not aware of the fact that Bucksport is a largely Black and lower income town that has extreme flooding issues that impact the residents …
Impacts Of Organic Matter On Laser Particle-Size Analysis Of Marsh Sediments, Alexander Powell
Impacts Of Organic Matter On Laser Particle-Size Analysis Of Marsh Sediments, Alexander Powell
Honors Theses
Grain size analysis (GSA) is widely used in sedimentology and paleoenvironmental reconstruction; however, its utility can be constrained by the presence of organic matter. This study assesses the impact of organic matter through the analysis and comparison of untreated and hydrogen peroxide-treated samples. Organic-rich samples from the Thousand Acre marsh in Georgetown, SC, were subjected to three treatments: untreated, standard, and enhanced. Grain size distribution was measured for each of these treatments using a CILAS 1190 laser diffraction particle analyzer, and organic matter was quantified by loss-on-ignition (LOI). Results show that untreated samples are significantly coarser than treated samples, demonstrating …
Hormonal Seed Priming As A Sustainable Alternative To Pesticides, Oyekemi Oyetoro, Swayamjit Ray
Hormonal Seed Priming As A Sustainable Alternative To Pesticides, Oyekemi Oyetoro, Swayamjit Ray
Research and Creative Works Expo
This study investigates the use of hormonal seed priming with Methyl Jasmonate (MeJA) and Methyl Salicylic Acid (MeSA) as a sustainable alternative to synthetic pesticides. By inducing Systemic Acquired Resistance (SAR) and Induced Systemic Resistance (ISR), these treatments aim to prepare plant defenses for rapid response to future herbivory with reduced reliance on chemical applications. The research specifically explores the growth-defense trade off, evaluating how various hormonal concentrations impact both pest resistance and seedling vigor. The findings identify optimal priming protocols that balance robust protection against herbivores with the maintenance of primary vegetative growth
Inconsistencies Emerge Between Regional And Local-Scale Water Security Metrics At Military Installations, Abigail Birnbaum, Michael L. Berg, Caitlin Grady, Daniel J. Weeks, Christopher M. Chini
Inconsistencies Emerge Between Regional And Local-Scale Water Security Metrics At Military Installations, Abigail Birnbaum, Michael L. Berg, Caitlin Grady, Daniel J. Weeks, Christopher M. Chini
Faculty Publications
Recent United States federal policy for military installations has emphasized the importance of developing a standardized approach for water security assessment to monitor changes in water resources and the ability for an installation to meet both its civilian and mission needs. For military installations in the United States, these assessments must consider demands both inside and outside the installation’s fence line, as regional resources are required to meet mission readiness. Focusing on physical water scarcity, this study compares four water security metrics with unique formulations and spatial resolutions, including an installation-scale metric and multiple regional metrics defined for either baseline …
From Ash Pond To Concrete: A Two-Step Treatment For Enhancing Reactivity Of Reclaimed Ashes, Aysan Farajnia
From Ash Pond To Concrete: A Two-Step Treatment For Enhancing Reactivity Of Reclaimed Ashes, Aysan Farajnia
World of Coal Ash Proceedings
The closure of coal-fired power plants has led to a shortage of fly ash for concrete, increasing interest in alternative Supplementary Cementitious Materials (SCMs). Reclaimed or harvested fly ash represents a promising SCM, but often fails to meet ASTM specifications due to impurities, variable composition, and low reactivity. This study highlights a two-phase evaluation of harvested coal ash from a local ash pond in Illinois. The first phase characterized ashes from different depths and locations based on chemical composition and pozzolanic reactivity. The second phase focused on a novel two-step treatment consisting of magnetic separation and mechanical grinding. On average, …
Narrative Power: Strengthening Coal Ash Communications In A Shifting Policy And Media Environment, Tamara Hinton
Narrative Power: Strengthening Coal Ash Communications In A Shifting Policy And Media Environment, Tamara Hinton
World of Coal Ash Proceedings
As coal ash management and beneficial use practices continue to advance and regulatory frameworks evolve, the industry still faces a persistent challenge: sharing its story clearly, credibly, and proactively to audiences beyond engineers and regulators. Public perception, media narratives, and stakeholder understanding increasingly influence policy decisions, project timelines, and market opportunities. This session focuses on how strategic communications can serve as a critical tool to support responsible coal ash management and beneficial use. This presentation explores how utilities and industry partners can move from reactive communications to a more deliberate, strategic approach that strengthens trust, mitigates risk, and reinforces the …
Liquefaction Susceptibility And Brittleness Of Coal Ash - A State Parameter Approach, Suafa'i Manson, Benoit Wentzinger, Scott Lines
Liquefaction Susceptibility And Brittleness Of Coal Ash - A State Parameter Approach, Suafa'i Manson, Benoit Wentzinger, Scott Lines
World of Coal Ash Proceedings
Limited data exists on the liquefaction susceptibility of combined fly ash and bottom ash deposits. Their low plasticity and settling density pose a risk of liquefaction under certain triggers. The liquefaction potential is linked to the in-situ state, defining its shearing behaviour as dilative or contractive based on relative density and effective confining stress. This can be assessed using the state parameter (Ψ) concept from critical state soil mechanics theory. This paper presents findings from a follow-up to our 2021 study, which used cone penetration test (CPT) based methods to estimate the in-situ state parameter and perform liquefaction susceptibility screening. …
Riki&Dolphin: Real Time Data Transmission From The Bottom Of A Cave To A Website, Luca Tringali, Giacomo Canciani Dr., Tecla Tripari, Alexander Debenjak, Caterina Bearzotti
Riki&Dolphin: Real Time Data Transmission From The Bottom Of A Cave To A Website, Luca Tringali, Giacomo Canciani Dr., Tecla Tripari, Alexander Debenjak, Caterina Bearzotti
International Journal of Speleology
Coming from over 10 years of experience in cave monitoring in northeast Italy, Gruppo Speleologico Talpe del Carso, has designed Riki and Dolphin: customizable, low cost, and easy to assemble tools for getting real time data transmission from the bottom of a cave, even underwater, to a webserver. Their use has been tested to monitor air temperature inside the Abisso Bonetti Cave (Classical Karst, Italy), proving for the first time that a cave in Gorizian Karst can systematically be colder than the outdoor temperature even in winter, recording an internal temperature even lower than 0°C. The Dolphin device can be …
A Remote Sensing Approach To Identifying Zones Of Instability In Mine Tailings Impoundments Using Multi-Sensor Satellite Data, Arden K. Pierce
A Remote Sensing Approach To Identifying Zones Of Instability In Mine Tailings Impoundments Using Multi-Sensor Satellite Data, Arden K. Pierce
Honors Theses
Mine tailings impoundments are structures built to contain the chemical and sedimentary byproducts generated by ore extraction activities. In this common method of mining waste storage, the tailings can be pumped into containment ponds and held behind earthen embankments to prevent the release of hazardous substances into the surrounding environment. Monitoring environmental factors that influence the structural integrity of these impoundments is essential for identifying areas vulnerable to instability and failure. Soil moisture is a factor that can affect the stability of mine tailings impoundment structures. This study evaluates the relationship between satellite-derived soil moisture and surface deformation at mine …
Coal Ash-Derived Aluminosilicate Precursors: A Chemical Engineering Approach To Geopolymer Characterization, Hafiz Abdul Basit, Abdullah Bashir, Abdur Raafey
Coal Ash-Derived Aluminosilicate Precursors: A Chemical Engineering Approach To Geopolymer Characterization, Hafiz Abdul Basit, Abdullah Bashir, Abdur Raafey
World of Coal Ash Proceedings
The chemical and microstructural evaluation of coal-derived aluminosilicate precursors is critical for understanding their suitability in advanced construction material systems. In this study, a characterization of Class F fly ash, ground granulated blast furnace slag (GGBFS), and Silica Fumes (SF) was conducted to elucidate their morphological and elemental features. Scanning Electron Microscopy (SEM) was used to assess particle morphology and surface characteristics (porosity, particle diameter, particle geometry), and Energy-Dispersive X-ray Spectroscopy (EDS) to determine elemental composition and distribution. The analysis revealed distinct morphological and compositional differences among the precursors, including spherical fly ash particles, calcium-rich slag phases, and ultra-fine silica …
Plasma Coal Ash Processing For Enhanced Recovery Of Rare Earth Elements & Precious Metals: Proven From R&D To Commercial Plants, George Paskalov, Victoria Campbell, Jason Honigberg
Plasma Coal Ash Processing For Enhanced Recovery Of Rare Earth Elements & Precious Metals: Proven From R&D To Commercial Plants, George Paskalov, Victoria Campbell, Jason Honigberg
World of Coal Ash Proceedings
Our Radio-frequency Plasma System is an ash pretreatment before the application of extractive metallurgy and addresses current elemental, methodological, and technological limitations of complex and refractory coal ash. Our system data shows from 10-20% improved recovery, to 9x-100x. RFP can access all metals contained in coal ash. Our focus is not on the alteration of established methodologies, such as cyanidation for non-refractory ore, which has a proven return and capacity to achieve target revenue at-scale. Using the RFP systems, no waste is created, overburden can be more easily dealt with, and no metal content will be left behind. We assert …
Comparison Of Residuals From Neighboring Power Stations With Different Coal Combustion Technologies, Allan Kolker, Denise Levitan, Brett Valentine
Comparison Of Residuals From Neighboring Power Stations With Different Coal Combustion Technologies, Allan Kolker, Denise Levitan, Brett Valentine
World of Coal Ash Proceedings
Due to the ongoing need for critical minerals, coal combustion residuals (CCR), like fly ash, have been evaluated as a potential source of critical minerals, particularly rare earth elements (REEs). Previous studies have found that REEs in fly ash are largely contained within aluminosilicate glass from which they are difficult to extract. However, these studies have predominantly studied CCR from conventional pulverized coal fired (PCF) plants. PCF plants use higher temperatures (≥1300°C) than do circulating fluidized-bed (CFB) plants (~900-950°C). Samples of feed coal, fly ash, and bottom ash were collected from two adjacent Vietnamese coal-fired power stations, one with a …