Results 21 to 30 of about 4,108 (201)

Space decomposition based parallelization solutions for the combined finite–discrete element method in 2D

Journal of Rock Mechanics and Geotechnical Engineering, 2014
The combined finite–discrete element method (FDEM) belongs to a family of methods of computational mechanics of discontinua. The method is suitable for problems of discontinua, where particles are deformable and can fracture or fragment. The applications
T. Lukas, G.G. Schiava D'Albano, A. Munjiza   +2 more
doaj   +1 more source

A Comparison of Frequency Domain Electro-Magnetometry, Electrical Resistivity Tomography and Borehole Temperatures to Assess the Presence of Ice in a Rock Glacier

Frontiers in Earth Science, 2020
Alpine permafrost is currently warming, leading to changes such as active layer deepening and talik formation. Frequency domain electro-magnetometry (FDEM) measurements were tested as a simple and efficient method to investigate ground characteristics ...
Jacopo Boaga, Jacopo Boaga, Marcia Phillips, Jeannette Noetzli, Anna Haberkorn, Robert Kenner, Alexander Bast   +6 more
doaj   +1 more source

Evaluating the Seismic Capacity of Dry-Joint Masonry Arch Structures via the Combined Finite-Discrete Element Method

Applied Sciences, 2021
The behaviour of dry-joint masonry arch structures is highly nonlinear and discontinuous since they are composed of individual discrete blocks. These structures are vulnerable to seismic excitations.
Wangpeng Li, Xudong Chen, Hongfan Wang, Andrew H. C. Chan, Yingyao Cheng   +4 more
doaj   +1 more source

A variational non-linear constrained model for the inversion of FDEM data* [PDF]

Inverse Problems, 2021
Abstract Reconstructing the structure of the soil using non-invasive techniques is a very relevant problem in many scientific fields, like geophysics and archaeology. This can be done, for instance, with the aid of frequency domain electromagnetic (FDEM) induction devices. Inverting FDEM data is a very challenging inverse problem, as the
Buccini, A, Díaz de Alba, P
openaire   +4 more sources

FDEMtools: a MATLAB package for FDEM data inversion

Numerical Algorithms, 2019
Electromagnetic induction surveys are among the most popular techniques for non-destructive investigation of soil properties in order to detect the presence of either ground inhomogeneities or of particular substances. This work introduces a MATLAB package for the inversion of electromagnetic data collected by a ground conductivity meter.
Gian Piero Deidda, Patricia Diaz de Alba, Caterina Fenu, Gabriele Lovicu, Giuseppe Rodriguez   +4 more
openaire   +4 more sources

GPGPU-parallelised hybrid finite-discrete element modelling of rock chipping and fragmentation process in mechanical cutting

Journal of Rock Mechanics and Geotechnical Engineering, 2020
Mechanical cutting provides one of the most flexible and environmentally friendly excavation methods. It has attracted numerous efforts to model the rock chipping and fragmentation process, especially using the explicit finite element method (FEM) and ...
Mojtaba Mohammadnejad, Sevda Dehkhoda, Daisuke Fukuda, Hongyuan Liu, Andrew Chan   +4 more
doaj   +1 more source

Social media and protest mobilization: evidence from the Tunisian revolution [PDF]

, 2014
This article explores how social media acted as a catalyst for protest mobilization during the Tunisian revolution in late 2010 and early 2011.
Aday Sean, Anita Breuer, Aouragh Miriyam, Berger Jonah, Chowdhury Mridul, Colomer Josep, Dalton Russell J., Dorothea Farquhar, Eckstein Harry, Eltantawy Nahed, Esseghaier Mariam, Foweraker Joe, Friedman Debra, Geddes Barbara, Goldstein Joshua, Goldstein Joshua, Howard Philip N., Kelly John, Kuebler Johanne, Landman Todd, Lichbach Mark, Lynch Daniel C., Lynch Marc, Noueihed Lin, Putnam Robert D., Rahimi Babak, Tarrow Sidney, Tilly Charles, Todd Landman, Tullock Gordon, van Laer Jeroen   +30 more
core   +2 more sources

Quantitative soil characterization using the frequency domain electromagnetic induction method in heterogeneous fields [PDF]

Hydrology and Earth System Sciences
The frequency domain electromagnetic induction (FDEM) method is a widely used tool for geophysical soil exploration. Field surveys using FDEM provide apparent electrical conductivity (ECa), which is typically used for qualitative interpretations ...
G. Mendoza, G. Blanchy, G. Blanchy, E. Van De Vijver, J. Verhegge, J. Verhegge, W. Cornelis, P. De Smedt, P. De Smedt   +8 more
doaj   +1 more source

Combining resistivity and frequency domain electromagnetic methods to investigate submarine groundwater discharge in the littoral zone [PDF]

Hydrology and Earth System Sciences, 2020
Submarine groundwater discharge (SGD) is an important gateway for nutrients and pollutants from land to sea. While understanding SGD is crucial for managing nearshore ecosystems and coastal freshwater reserves, studying this discharge is complicated by ...
M. Paepen, D. Hanssens, P. De Smedt, K. Walraevens, T. Hermans   +4 more
doaj   +1 more source

Modeling Simultaneous Multiple Fracturing Using the Combined Finite-Discrete Element Method

Geofluids, 2018
Simultaneous multiple fracturing is a key technology to facilitate the production of shale oil/gas. When multiple hydraulic fractures propagate simultaneously, there is an interaction effect among these propagating hydraulic fractures, known as the ...
Quansheng Liu, Lei Sun, Pingli Liu, Lei Chen   +3 more
doaj   +1 more source