Preprints
Filtering by Subject: Engineering
Performance and Stability Analysis of a GEIOS Proprietary Ionic Nanofluid for Medium to High-Temperature Geothermal Applications
Published: 2025-03-03
Subjects: Chemical Engineering, Engineering, Engineering Science and Materials, Environmental Sciences, Mechanical Engineering, Other Engineering, Physical Sciences and Mathematics, Physics
This study investigates the performance and stability of a proprietary ionic nanofluid developed by GEIOS Technologies for medium to high-temperature geothermal applications. The nanofluid integrates boron nitride nanoparticles, proprietary surface modifiers, and quantum-optimized additives to enhance thermal conductivity, heat transfer efficiency, and operational stability in closed-loop [...]
Novel Nitrogen Hybrid Gas-Based Nanofoam System for Enhanced Geothermal Applications: Nanogeios and GEIOS Geothermal EQG
Published: 2025-03-03
Subjects: Chemical Engineering, Engineering, Materials Science and Engineering, Physical Sciences and Mathematics, Physics
This study presents a novel nitrogen hybrid gas nanofoam system designed for enhanced geothermal applications, validated through comprehensive laboratory testing. The system integrates a nitrogen gas matrix (95% by volume) infused with engineered aluminum oxide (0.6–0.8% vol) and silica (0.3–0.5% vol) nanoparticles, achieving superior thermal conductivity and fracture stability under simulated [...]
Floods, Facts, and Fictions: Numbers and Narratives Behind Bangladesh’s 2024 Regional Floods
Published: 2025-02-27
Subjects: Engineering, Social and Behavioral Sciences
The August 2024 regional floods in Bangladesh, occurring shortly after a major political upheaval, were among the most severe in recent history, displacing millions and causing extensive damage. This paper examines both the scientific and social dimensions of this disaster by exploring the natural drivers that led to the flooding and the sociopolitical context that caused rumors to spread that [...]
A composite index-based insurance instrument for managing the financial risk of variable hydrometeorology for electric utilities
Published: 2025-02-27
Subjects: Civil and Environmental Engineering, Engineering
Variable hydrometeorological conditions can impact electric utilities' financial stability. Extreme temperatures often increase electricity demand, raising utility costs, while drought reduces hydropower generation and often reduces revenues, with financial impacts potentially exacerbated by spikes in fuel prices, particularly natural gas. In this study, a model of the U.S. West Coast power [...]
Thirty Years of the Open Geospatial Consortium - History, Present, and Future
Published: 2025-02-22
Subjects: Engineering, Physical Sciences and Mathematics, Social and Behavioral Sciences
For 30 years, the Open Geospatial Consortium (OGC) has advanced geospatial interoperability through continuous innovation. The OGC provides strategies and Standards that promote adoption, increase efficiencies, create new opportunities, and transform our relationship with the dynamic planet we inhabit. It has fostered global collaborations among companies, governments, academic institutions, and [...]
The Role of Geospatial Intelligence in Modern Military Operations
Published: 2025-02-21
Subjects: Engineering, Physical Sciences and Mathematics
Geospatial intelligence (GEOINT) has become an indispensable tool in modern military operations since it considerably increases situational awareness, strategic decision-making, and operational success. Advanced geospatial technologies have changed military force collecting, analysis, and spatial data interpretation, including satellite imagery, remote sensing, geographic information systems [...]
Using fracture-scarp lineations as kinematic indicators on active normal fault scarps
Published: 2025-02-21
Subjects: Engineering, Physical Sciences and Mathematics
Reliable kinematic (slip vector) data collected from offset piercing points, corrugations or striations, is a key input for fault based seismic hazard assessments. However, it can be difficult to interpret kinematic indicators on degraded fault scarps. In this work, we investigate the orientations and growth history of on-fault fracture networks, which extend into the footwall and have greater [...]
The Importance of Geospatial Technology in Monitoring Plant Health
Published: 2025-02-20
Subjects: Engineering, Life Sciences, Physical Sciences and Mathematics
Solving the problems presented by climate change depends on geospatial technology in great measure. Through shifting pest and disease dynamics, increasing frequency of extreme weather events, and modifying growth circumstances, climate change aggravates problems with plant health. For example, remote sensing data and satellite-based climate models help one to forecast how variations in [...]
Geochemical Dynamics in Organic-Rich Mudstone Reservoirs: Interactions and Implications
Published: 2025-02-16
Subjects: Engineering
This paper explores the intricate geochemical characteristics of organic-rich mudstone reservoirs, focusing on key factors such as thermal maturity, wettability, and adsorption properties. These reservoirs, often referred to as unconventional hydrocarbon systems, are composed of complex organic and inorganic phases that interact dynamically over geological timescales. Understanding these [...]
A Systems-Level Approach to Extracting Oxygen from Lunar Regolith via Molten Regolith Electrolysis
Published: 2025-02-11
Subjects: Aerospace Engineering, Engineering, Other Planetary Sciences, Planetary Sciences
We present a top-level architecture for extracting up to 10 metric tonnes per year of oxygen from lunar regolith by means of Molten Regolith Electrolysis (MRE) using less than 30 kW from vertical solar arrays and a regolith excavator. This System Integration Study identifies specific technology which could be engineered together in the near term into a single system and lander provided focused [...]
Integration of Different Permeability Model Parameters for Permeability Prediction from Capillary Pressure Curves in Carbonate Reservoirs
Published: 2025-02-11
Subjects: Engineering
Permeability prediction is essential for reservoir characterization, commonly derived from core analysis and mercury injection capillary pressure (MICP) data. Many conventional models, often calibrated for sandstones, are based on parameters such as porosity or specific mercury saturation points, which limits their accuracy in carbonate reservoirs due to differing rock properties. This study [...]
Managing Smoke Risk from Wildland Fires: Northern California as a Case Study
Published: 2025-02-10
Subjects: Engineering, Physical Sciences and Mathematics, Social and Behavioral Sciences
Smoke fine particulate matter (PM2.5) from increasing wildfires in the western United States threatens public health. While land managers often prioritize reducing wildfire risk in the wildland-urban interface, the impact on regional air quality from mitigating wildfire spread is less explored. We develop a framework to quantify wildfire contributions to smoke exposure and assess targeted land [...]
Quantifying interfacial interactions between kerogen, water, and hydrocarbons across thermal maturity levels and their impact on fluid mobility
Published: 2025-02-06
Subjects: Engineering
Wettability of organic-rich mudrocks has significant impacts on multiphase fluid flow and hydrocarbon recovery. Since kerogen can constitute a significant volumetric fraction of mudrocks, the wettability of kerogen can considerably affect the wettability of organic-rich mudrocks. In a recent project, we showed using a combination of experimental methods and molecular simulation studies that [...]
A Comprehensive Bibliometric Analysis of Large Language Models in Hydrology and Environmental Sciences
Published: 2025-02-05
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering
The application of large language models (LLMs) in hydrology and environmental sciences is expanding rapidly, but a comprehensive understanding of their potential, best practices and application areas are studied extensively. This study conducts a bibliometric analysis of recent scientific literature to evaluate publication trends, citation impact, and the key contributors in LLM-related research [...]
Most Landfill Methane Emissions Escape Detection in EPA21 Surface Emission Monitoring Surveys
Published: 2025-02-05
Subjects: Engineering, Life Sciences
We measured emissions from ten landfills using mobile surveys and Surface Emission Monitoring (SEM) to determine what fraction of emissions that be identified by SEM surveys. Using mobile methane measurements and a back-trajectory attribution and rate estimation method, we measured overall site emissions and those of individual landfill components (active face, closed cells, leachate, etc). We [...]