Preprints
Filtering by Subject: Engineering
Examining copper supply feasibility in decarbonization pathways: a mine-level dynamic approach
Published: 2025-04-01
Subjects: Engineering, Physical Sciences and Mathematics
Primary copper production capacity is a major concern in light of estimates of future demand. This issue is not sufficiently taken into account in models providing decarbonization pathways. Our study assesses the feasibility of SSPs basic drivers for primary copper requirements derived from the DyMEMDS model, alongside our projections of primary copper production capacities. We introduce a [...]
Total Phosphorus trends in Mississippi and Atchafalaya River Basin Watersheds: Exploring the roles of streamflow and watershed features 2000-2020
Published: 2025-03-29
Subjects: Engineering
A consistent method of analyzing riverine phosphorus concentrations and load trends across subbasins of the Mississippi Atchafalaya River Basin (MARB) can indicate whether and where nutrient loads and concentrations have increased or decreased over the long-term. This can help evaluate the success of federal and state nutrient reduction plans being implemented across the landscape and inform [...]
Geomorphology of Meso-Yardang Formation and Evolution in Fahraj Plain, SE Iran: The Role of Stream Incision, Sandblasting, and Nebkha Transformation
Published: 2025-03-29
Subjects: Education, Engineering
The purpose of this study is to investigate on meso - yardags of Fahraj Plain in SE Iran. The playa on which the yardangs have taken shape has been divided into northern and southern parts as a result of incision by Nesa ephemeral stream . Detailed field investigations were performed and samples were taken to determine the texture, mineralogy and chemical characteristics of mudrocks comprising [...]
Multivariate Regression Analysis for Identifying Key Drivers of Harmful Algal Bloom in Lake Erie
Published: 2025-03-28
Subjects: Engineering, Environmental Engineering, Environmental Indicators and Impact Assessment, Multivariate Analysis
Harmful Algal Blooms (HABs), predominantly driven by cyanobacteria, pose significant risks to water quality, public health, and aquatic ecosystems. Lake Erie, particularly its western basin, has been severely impacted by HABs, largely due to nutrient pollution and climatic changes. This study aims to identify key physical, chemical, and biological drivers influencing HABs using a multivariate [...]
Calibration of Permeability Models from Sandstones to Carbonates Using Capillary Pressure: Applicable to U.S. Shallow Marine Reservoirs
Published: 2025-03-26
Subjects: Engineering
Permeability estimation plays a crucial role in reservoir characterization and is commonly determined through core analysis. Additionally, permeability can be inferred from mercury injection test data. Several models have been developed for this purpose, with their parameters influenced by factors such as pore structure, rock heterogeneity, and pore throat distribution. The widely recognized [...]
Nanogeios Nanoliquid CO₂ – Performance Evaluation of Hybrid Nanofluid-Enhanced Liquid CO₂ for Advanced District and Data Center Cooling Applications
Published: 2025-03-22
Subjects: Chemical Engineering, Ecology and Evolutionary Biology, Engineering, Engineering Science and Materials, Mechanical Engineering, Neuroscience and Neurobiology, Other Engineering, Physical Sciences and Mathematics, Physics
This study presents a comprehensive evaluation of a novel hybrid nanofluid-enhanced liquid CO₂, engineered to address cooling challenges in water-scarce environments. Developed by NanoGEIOS, the fluid combines graphene oxide (GO) and carbon nanotubes (CNTs) in a 1:1 ratio (2 vol%) and is optimized using AI-powered NanoFusion dispersion technology. The nanofluid exhibits a 77% increase in thermal [...]
Generative Prior Transformation model for mineral resources evaluation and prediction (MineralGPT): A case study of prospective target area selection for the Xiaoshan-Xiongershan area gold polymetallic deposit
Published: 2025-03-21
Subjects: Engineering
Mineral resources are an important material foundation for economic and social development. The mineral resources evaluation and prediction will provide scientific basis for the development, utilization, and protection of mineral resources. The existing traditional artificial mineral resource comprehensive evaluation methods are costly, time-consuming, and have limited data processing and [...]
Paddy Segmentation Using Google Earth Engine: A Remote Sensing Approach Abstract
Published: 2025-03-20
Subjects: Education, Engineering, Life Sciences
Paddy field segmentation using remote sensing is crucial for agricultural monitoring, yield prediction, and resource allocation. In this research, we employ Google Earth Engine (GEE) for paddy segmentation using Sentinel-2 satellite imagery. Our method leverages Normalized Difference Vegetation Index (NDVI) and Land Surface Water Index (LSWI) to mask paddy fields efficiently. We collected 2000 [...]
Impact of Urbanisation On Surface Temperature of Bangalore City
Published: 2025-03-20
Subjects: Engineering
The city of Bangalore in India is well known for its IT industries and has certain geographical advantages that help maintain a pleasant climate throughout the year. At the same time, it is a rapidly growing city, with a decadal population growth rate of 47\% between 2001 and 2011. Bangalore is also recognised for its greenery, lakes, and focus on sustainable development. In this study, we [...]
Physically consistent sectoral pathways for phasing out fossil fuels
Published: 2025-03-18
Subjects: Engineering, Physical Sciences and Mathematics
The transition away from fossil fuels relies on electricity-producing renewable energy sources. To understand how much electricity is needed to substitute fossil fuels, sectors of the economy being electrified must be analysed discretely, as their suitability for electrification varies significantly. Constructing, operating, and maintaining these renewable power plants requires substantial [...]
A Data-Driven Method for Improving Historical Maps' Positional Accuracy
Published: 2025-03-16
Subjects: Engineering, Geographic Information Sciences, Geography, Other Engineering
Positional accuracy improvement (PAI) of historical maps involves correcting their inherent geometric distortions, which often limit their usability in modern applications. Although resurveying an entire map provides the most accurate solution for PAI, it is costly, time-consuming, and often impossible. This study proposes a cost-effective, alternative data-driven method, using Generalized [...]
Understanding Flood Risk in Public Transit Systems: Insights from Accessibility and Vulnerability Analysis in Iowa
Published: 2025-03-14
Subjects: Civil and Environmental Engineering, Civil Engineering, Engineering, Geographic Information Sciences, Geography, Operations Research, Systems Engineering and Industrial Engineering, Risk Analysis, Spatial Science, Transportation Engineering
Flooding is a major challenge for urban transportation systems, hindering access to essential services and jobs, especially for vulnerable populations. This study examines the impact of large flood extents on public transportation in Johnson and Linn counties, Iowa, United States, focusing on flood-prone bus routes, reduced service frequency, and access to job locations. Using Geographic [...]
Collaborative Assessment of a Large-Scale Integrated Landscape Restoration Project in the Steep-Slope Regions of Central Africa
Published: 2025-03-14
Subjects: Engineering, Life Sciences
Landscape restoration projects are among the most extensive conservation actions at the global level that have been promoted in the last three decades. Such projects, however, cannot exclusively be based on the restoration of natural and semi-natural ecosystems, but should focus on a cultural landscape approach balancing environmental and socio-economic needs. One of the largest restoration [...]
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 [...]