Preprints

Filtering by Subject: Engineering

WITHDRAWN: Earthquakes and Other Seismic Processes as Part of Impact Theory

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: The Energy of Earthquakes. What's Wrong with the Elastic Recoil Theory?

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

WITHDRAWN: Thermonuclear Fusion as a Source of Seismic Phenomena?

serguei bytchkov

Published: 2023-11-01
Subjects: Education, Engineering, Physical Sciences and Mathematics

Abstract removed when submission was withdrawn.

Pacific shoreline erosion and accretion patterns controlled by El Niño/Southern Oscillation

Kilian Vos, Mitchell Dean Harley, Ian L Turner, et al.

Published: 2023-10-28
Subjects: Civil and Environmental Engineering, Climate, Earth Sciences, Engineering, Environmental Monitoring, Environmental Sciences, Geomorphology, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

In the Pacific Basin, the El Niño/Southern Oscillation (ENSO) is the dominant mode of interannual climate variability, driving substantial changes in oceanographic forcing and impacting Pacific coastlines. Yet, how sandy coasts respond to these basin-scale changes has to date been limited to a few long-term beach monitoring sites, predominantly on developed coasts. Here we use 38 years of Landsat [...]

Poroelastic Properties of Sierra White Granite

Ahmad Ghassemi, Xejun Zhou

Published: 2023-10-19
Subjects: Engineering

In this work, poroelastic properties of Sierra White granite are determined, including elastic moduli, Biot's effective stress coefficient, α, and Skempton’s pore pressure coefficient, B. The Biot’s coefficient of this rock was determined using two different approaches. It is found that overall, the Biot’s coefficient decreases from 0.77 at low effective stress (3~4 MPa) to 0.45~0.55 at high [...]

CASH Paradox, ReWASH, Bronze-2-Gold and JEDI AWAKENS: introduction of new concepts to enhance the sustainability of the water-energy nexus

Gabriel Marinho Silva, Pedro Gustavo Câmara da Silva, Mateo Hernández Sánchez, et al.

Published: 2023-10-04
Subjects: Education, Engineering, Social and Behavioral Sciences

Amidst the escalating impacts of climate change and extreme weather events, participatory decision-making in water management stands out as a sustainable approach for disaster risk reduction. Hydrological disasters, such as floods and droughts, are increasing globally due to anthropogenic activities, necessitating adaptation in water infrastructure. The OECD projects severe water stress for 2.3 [...]

Persistent Global Greening Over the Last Four Decades Using Novel Long-term Vegetation Index Data with Enhanced Temporal Consistency

Sungchan Jeong, Youngryel Ryu, Pierre Gentine, et al.

Published: 2023-10-02
Subjects: Engineering

Advanced Very High-Resolution Radiometer (AVHRR) satellite observations have provided the longest global daily records from the 1980s, but the remaining temporal inconsistency in vegetation index datasets has hindered reliable assessment of vegetation greenness trends. To tackle this, we generated novel global long-term Normalized Difference Vegetation Index (NDVI) and Near-Infrared Reflectance [...]

Thermo-hydraulic analysis of desiccation cracked soil strata considering ground temperature and moisture dynamics under the influence of soil-atmosphere interactions

Milad Jabbarzadeh, Hamed Sadeghi, Saeed Tourchi, et al.

Published: 2023-09-27
Subjects: Engineering

Global warming and climate change significantly affect ground temperature and flow patterns. Moreover, areas prone to cracking experience intensified temperature and moisture variations. Therefore, the aim of this study is to investigate ground temperature and moisture dynamics considering soil-atmosphere interaction through a coupled thermo-hydraulic analysis. Heat transfer, advective, and [...]

Space-time data-driven modeling of precipitation-induced shallow landslides in South Tyrol, Italy

Mateo Moreno, Luigi Lombardo, Alice Crespi, et al.

Published: 2023-09-25
Subjects: Engineering, Physical Sciences and Mathematics

Shallow landslides represent potentially damaging processes in mountain areas worldwide. These geomorphic processes are usually caused by a combination of predisposing, preparatory, and triggering environmental factors. At regional scales, data-driven methods have been used to model shallow landslides by addressing the spatial and temporal components separately. So far, few studies have explored [...]

FireSight: Utilizing Deep Learning for Wildfire Prediction And Determining Escape Routes

Aniket Mittal

Published: 2023-09-22
Subjects: Engineering, Physical Sciences and Mathematics

Since 2000, seven million acres have burned every year. Yet, since robust analytics are scarce, capitalizing on machine learning algorithms have the capability to bridge gaps in decision making and effective deployment. Despite this, a major limitation in current research is resolution and accuracy. Utilizing public data from NASA’s MODIS, LP DAAC, University of Idaho, and UC Irvine, 12 input [...]

Estimating Three-Dimensional Displacements with InSAR: the Strapdown Approach

Wietske S Brouwer, Ramon Hanssen

Published: 2023-09-08
Subjects: Engineering, Physical Sciences and Mathematics

Deformation phenomena on Earth are inherently three dimensional. With InSAR, in many practical situations the maximum number of observations is two (ascending and descending), resulting in an infinite number of possible displacement estimates. Here we propose a practical solution to this underdeterminancy problem in the form of the strapdown approach. With the strapdown approach it is possible to [...]

Independent estimates of net carbon uptake in croplands: UAV-LiDAR and machine learning vs. eddy-covariance

Jaime C Revenga, Katerina Trepekli, Rasmus Jensen, et al.

Published: 2023-08-30
Subjects: Engineering, Life Sciences, Physical Sciences and Mathematics

Understanding sequestration of organic carbon (C) in agroecosystems is of primary importance for greenhouse gas (GHG) accounting in managed ecosystems, reducing the environmental footprint of land use, and inform crediting programs. However, a broader application of precise C accounting is currently constrained by a limited number of direct flux measurements. Aside well-studied ecosystems via [...]

Quantifying salinity in heterogeneous coastal aquifers through ERT and IP: insights from laboratory and field investigations

Cong-Thi Diep, Pham Dieu Linh, David Caterina, et al.

Published: 2023-08-25
Subjects: Engineering

The lithological and stratigraphical heterogeneity of coastal aquifers has a great influence on saltwater intrusion (SI). This makes it difficult to predict SI pathways and their persistence in time. In this context, electrical resistivity tomography (ERT) and induced polarization (IP) methods are receiving increasing attention regarding the discrimination between saltwater-bearing and clayey [...]

Thermo-hydro-mechanical simulation of deep excavations in claystone

Saeed Tourchi, Miguel Angel Manica Malcom, Jean Vaunat, et al.

Published: 2023-08-17
Subjects: Engineering

Marine Cloud Brightening: an airborne concept

Christian Claudel, Andrew John Lockley, Fabian Hoffmann, et al.

Published: 2023-08-12
Subjects: Engineering

Marine cloud brightening (MCB) is a proposed solar radiation modification (SRM) geoengineering technique to enhance marine boundary layer (MBL) cloud albedo. Extant proposals consider 10,000-100,000 autonomous ships spraying seawater, generating and dispersing sea salt nanoparticles. Alternatively, this paper proposes industrially manufacturing NaCl nanoparticles using ethanol anti-solvent brine [...]

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