Preprints
There are 7999 Preprints listed.
STUDY OF THERMOLUMINESCENCE CHARACTERISTICS OF QUARTZ FOR HIGH RADIATION DOSES (>1KGY): IMPLICATIONS FOR EXTENDING THE LUMINESCENCE DATING RANGE
Published: 2024-05-30
Subjects: Life Sciences, Physical Sciences and Mathematics
Quartz is an omnipresent abundant natural mineral, used for luminescence dating. Lately, quartz optically stimulated luminescence (OSL) technique is widely used to estimate the equivalent doses (De) for dating geological events (up to 250 Gy, limited by saturation). Some works report thermoluminescence (TL) saturation around ~ (10-40) kGy. Still dose estimates for such high radiation dose (HRD) [...]
Linking petrographic and geochemical indicators of melt reactions in pelitic migmatites and leucogranites
Published: 2024-05-31
Subjects: Earth Sciences
Anatexis in orogenic systems has wide-reaching implications for the structure, mechanical strength, and later exhumation of the middle crust during orogeny. Previous studies of melt reactions in metapelitic rocks have identified three major melt-producing reactions: fluid-present incongruent melting, fluid-absent muscovite dehydration melting, and fluid-absent biotite dehydration melting. Due to [...]
Unique composition and evolutionary histories of large low velocity provinces
Published: 2024-05-30
Subjects: Earth Sciences, Geophysics and Seismology, Other Earth Sciences, Physical Sciences and Mathematics
The two ``large low velocity provinces'' (LLVPs) are broad, low seismic wave speed anomalies in Earth's lower mantle beneath Africa and the Pacific Ocean. Recent research suggests they contain relatively dense subducted oceanic crust (SOC), but the relative concentration of this recycled material within them is an open question. Using simulations of 3-D global mantle circulation over the past 1 [...]
Ensemble Kalman, Adaptive Gaussian Mixture, and Particle Flow Filters for Optimized Earthquake Forecasting
Published: 2024-06-01
Subjects: Dynamical Systems, Geophysics and Seismology, Other Statistics and Probability
Probabilistic forecasts are regarded as the highest achievable goal when predicting earthquakes, but limited information on stress, strength, and governing parameters of the seismogenic sources affects their accuracy. Ensemble data-assimilation methods, such as the Ensemble Kalman Filter (EnKF), estimate these variables by combining physics-based models and observations.While the EnKF has [...]
Integrating Conversational AI Agents for Enhanced Water Quality Analytics: Development of a Novel Data Expert System
Published: 2024-06-01
Subjects: Artificial Intelligence and Robotics, Civil Engineering, Databases and Information Systems, Environmental Engineering, Hydrology, Software Engineering
Despite advancements in environmental monitoring, the gap between data collection and user-friendly data interpretation remains a significant challenge, especially in the domain of water quality management. This paper introduces the Artificial Intelligence Data Expert (AI-DE), a novel data analytics system that is designed to facilitate on-demand analysis of time-series sensor data related to [...]
Understanding the Importance of Stellar Birth and Evolution for a Comprehensive Understanding of the Sun and Other Stars
Published: 2024-09-02
Subjects: Physical Sciences and Mathematics
Stars are massive, luminous celestial bodies that are primarily composed of hydrogen and helium gas, as well as other trace elements. Considered as the building blocks of galaxies, including our own Milky Way, and play a crucial role in the formation and evolution of the universe. In the context of the solar system, the Sun is the most important star. It is the center of the solar system, around [...]
A myriad of melt inclusions: a 3D view into the volcanic time capsules of Colli Albani Volcano (Italy)
Published: 2024-06-05
Subjects: Geology, Volcanology
Melt inclusions are small parcels of magma trapped in crystals, which hold key information about pre-eruptive magmatic conditions including volatile content and melt chemistry. We focus here on melt inclusions for a nuanced view of the magmatic pre-eruptive state of Colli Albani, a mafic-alkaline ignimbrite forming system in central Italy. Recent years have seen an increased amount of research [...]
Investigating the Dynamic History of a Promontory Ice Rise using Radar Data
Published: 2024-06-07
Subjects: Geophysics and Seismology, Glaciology
Ice rises hold valuable records revealing the ice dynamics and climatic history of Antarctic coastal areas from the Last Glacial Maximum to today. This history is often reconstructed from isochrone radar stratigraphy and simulations focusing on Raymond arch evolution beneath the divides. However, this relies on complex ice-flow models where many parameters are unconstrained by observations. Our [...]
Multicomponent and multiphase CO2-brine system in microfluidic characterised in situ by Raman spectroscopy
Published: 2024-06-06
Subjects: Chemical Engineering, Complex Fluids, Mining Engineering, Petroleum Engineering
Deep-saline aquifers could be instrumental in the geological storage of carbon dioxide due to their relatively good reservoir properties, high volume, and prevalence. However, there are a few difficulties which should be overcome to obtain effective stores in such reservoirs. Most problems are related to formation damage caused by salt precipitation. Due to the complexity of such systems, it is [...]
Do large earthquakes start with a precursory phase of slow slip?
Published: 2024-06-06
Subjects: Geophysics and Seismology
In a recent publication, we showed that a stack of all GPS time series recorded before Magnitude ≥ 7.0 earthquakes suggests that large earthquakes start with a precursory phase of accelerating slow slip (Bletery and Nocquet, 2023). While no peer-reviewed comment or publication has formally contradicted this result, informal discussion has emerged on various platforms. We present here the [...]
Exploring coastal climate adaptation through storylines: Insights from Cyclone Idai in Beira, Mozambique
Published: 2024-06-10
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Environmental Engineering, Environmental Sciences, Hydraulic Engineering, Hydrology, Meteorology, Natural Resources Management and Policy, Water Resource Management
Coastal settlements, facing increasing flood risk from Tropical Cyclones (TCs) under climate change, need local and detailed climate information for effective adaptation. Analysis of historical events and their impacts provides such information. This study uses storylines to evaluate adaptation strategies, focusing on Cyclone Idai’s impact on Beira, Mozambique, under different climate conditions [...]
Marketing Aspects for IMACS
Published: 2024-06-10
Subjects: Physical Sciences and Mathematics
A series of papers was pre-printed explaining the prior published patent application for a first-principals-based sustainability measurement system. In addition to measuring environmental and human condition impacts, the Impact Measurement And Conservation System (IMACS) automatically applies conservation to participating products sold by participating retailers and purchased by participating [...]
Impact Measurement and Application of Conservation System (IMACS)
Published: 2024-06-10
Subjects: Physical Sciences and Mathematics
This article describes the first “first principals’ based” system of methods for the calculation of environmental (E) and human condition (H) impacts and sustainabilities for all products, services and individuals as a set of universally standardized methods, earlier published as a patent application (1). The overall system allows buyers to select more sustainable products and services, and [...]
Calculation of Individual Sustainable Absorption for IMACS
Published: 2024-06-10
Subjects: Physical Sciences and Mathematics
This article describes the first universally standardized and first-principals-based method to calculate the amounts of environmental and human resources an individual can use sustainably. The sustainable available resource amount calculated for each resource type used, must be deducted from the individual’s resource consumption to calculate the net resource use of the individual’s labor output. [...]
The environmental impact of a malaria clinical trial in Mali: Life cycle assessment reveals high emissions due to international travel and local electricity use and identifies opportunities for sustainable improvement
Published: 2024-09-13
Subjects: Pharmacology, Toxicology and Environmental Health
Climate change may be the single largest threat facing humanity and ecosystems, necessitating decarbonization across all sectors, including healthcare and academia. With the aim of informing and supporting sustainable research practices, we performed a life cycle assessment of a clinical trial conducted in Mali. The trial involved 80 malaria-infected participants in Ouélessébougou who were [...]