Results 101 to 110 of about 907,541 (362)
From Ancient Techniques to Modern Solutions: In Situ Synthesis of C‐S‐H for Sandstone Conservation
Advanced Science, EarlyView.Herein, this work presents a paleo‐inspired approach to synthesizing and optimizing C‐S‐H‐based grouting mortars for conserving the sandstone of Beishan Grottoes, Dazu Rock Carvings, China. By achieving an optimal recipe compatible with natural sandstone, this work demonstrates the pivotal role of hydrogen bonding in the adhesion between C‐S‐H mortars ...
Mengjun Jia +9 more
wiley +1 more source
One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36 [PDF]
, 2004 Measurements of 81Kr/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser-based atom-counting method. 81Kr ages range from \~2x10^5 to ~1x10^6 yr, correlate with 36Cl/Cl ratios, and are consistent with lateral flow of groundwater from a recharge area near the Uweinat Uplift in SW Egypt.
arxiv +1 more source
Understanding the Efficacy of U-Net & Vision Transformer for Groundwater Numerical Modelling [PDF]
arXiv, 2023 This paper presents a comprehensive comparison of various machine learning models, namely U-Net, U-Net integrated with Vision Transformers (ViT), and Fourier Neural Operator (FNO), for time-dependent forward modelling in groundwater systems. Through testing on synthetic datasets, it is demonstrated that U-Net and U-Net + ViT models outperform FNO in ...
arxiv
Electronic Nanomaterials for Plants: A Review on Current Advances and Future Prospects
Advanced Electronic Materials, EarlyView.Global food security faces mounting challenges from climate change and rapid population growth. This review highlights the pivotal role of electronic nanomaterials–including metals, metal oxides, and carbon‐based structures–in enhancing plant photosynthesis, nutrient uptake, and stress resilience. Furthermore, it explores how emerging platforms such as
Ciro Allará +8 more
wiley +1 more source
Geofluids, 2017 The multistage and discontinuous nature of the injection process used in the geological storage of CO2 causes reservoirs to experience repeated loading and unloading.
Fugang Wang +6 more
doaj +1 more source
Groundwater pumping to increase food production causes persistent groundwater drought in India [PDF]
arXiv, 2019 Rapid groundwater depletion in India is a sustainability challenge. However, the crucial role of climate and groundwater pumping on persisting groundwater drought remains unrecognized. Using the data from Gravity recovery climate experiment (GRACE) satellites and more than 5000 observational wells, here we show that the increase in precipitation in ...
arxiv
Impacts of geopolitics and policy on Latin American biodiversity and water resources
Agribusiness, EarlyView.Abstract Latin America is a major agricultural producer with important natural resources. Efforts have been made to protect sensitive areas but are hindered by agricultural trade disruptions outside the control of individual countries due to globally integrated crop markets.
Jerome Dumortier +2 more
wiley +1 more source
Numerical Modeling of Gas Migration and Hydrate Formation in Heterogeneous Marine Sediments
Journal of Marine Science and Engineering, 2019 The formation of marine gas hydrates is controlled by gas migration and accumulation from lower sediments and by the conditions of the hydrate stability zone.
Keqi Bei +5 more
doaj +1 more source
Surrogate Optimization of Deep Neural Networks for Groundwater Predictions [PDF]
arXiv, 2019 Sustainable management of groundwater resources under changing climatic conditions require an application of reliable and accurate predictions of groundwater levels. Mechanistic multi-scale, multi-physics simulation models are often too hard to use for this purpose, especially for groundwater managers who do not have access to the complex compute ...
arxiv
SARGDV: Efficient identification of groundwater-dependent vegetation using synthetic aperture radar [PDF]
arXiv, 2020 Groundwater depletion impacts the sustainability of numerous groundwater-dependent vegetation (GDV) globally, placing significant stress on their capacity to provide environmental and ecological support for flora, fauna, and anthropic benefits. Industries such as mining, agriculture, and plantations are heavily reliant on groundwater, the over ...
arxiv