Results 21 to 30 of about 1,991 (161)
Advances in Civil Engineering, Volume 2018, Issue 1, 2018., 2018 Tunnelling processes lead to stress changes surrounding an underground opening resulting in the disturbance and potential damage of the surrounding ground. Especially, when it comes to hard rocks at great depths, the rockmass is more likely to respond in a brittle manner during the excavation.
Nicholas Vlachopoulos +2 more
wiley +1 more source
Revista de Estudios Latinoamericanos sobre Reducción del Riesgo de DesastresSe analizan los discursos relativos a casos específicos de actividad volcánica en Costa Rica publicados en la prensa entre los siglos XIX y XXI, con el propósito de identificar cambios en la percepción hacia el volcanismo. Se constató cómo, a finales del
Mauricio M. Mora +2 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 18, Issue 12, Page 4437-4468, December 2017., 2017 Abstract This work presents a new database of SO2 and CO2 fluxes from the Southern Central American Volcanic Arc (SCAVA) for the period 2015–2016. We report ∼300 SO2 flux measurements from 10 volcanoes and gas ratios from 11 volcanoes in Costa Rica and Nicaragua representing the most extensive available assessment of this ∼500 km arc segment.
J. M. de Moor +9 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 121, Issue 8, Page 5761-5775, August 2016., 2016 Abstract Eruptive activity at Turrialba Volcano (Costa Rica) has escalated significantly since 2014, causing airport and school closures in the capital city of San José. Whether or not new magma is involved in the current unrest seems probable but remains a matter of debate as ash deposits are dominated by hydrothermal material.
J. Maarten de Moor +11 more
wiley +1 more source
How assumed composition affects the interpretation of satellite observations of volcanic ash
Meteorological Applications, Volume 21, Issue 1, Page 20-29, January 2014., 2014 ABSTRACT The monitoring of volcanic ash in the atmosphere by satellite‐borne instruments is highly important for generation of warnings of potential ash hazards to aviation, and to constraining model predictions of an ash cloud's anticipated evolution. The high economic cost of flight restrictions creates a demand for precise monitoring and forecasting;
Shona Mackie +2 more
wiley +1 more source
FEM-DEM simulation of Brazilian Tensile Strength (BTS) laboratory tests
REM: International Engineering Journal, 2021 A Brazilian Tensile Strength (BTS) laboratory test for meta-andesite was modeled using a Finite/Discrete Element Method (FDEM or FEM-DEM). These hybrid methodologies allow modeling the transition from continuous to discontinuous that happens on ...
Michel Melo Oliveira +2 more
doaj +1 more source
Multicompare Tests of the Performance of Different Metaheuristics in EEG Dipole Source Localization
The Scientific World Journal, Volume 2014, Issue 1, 2014., 2014 We study the use of nonparametric multicompare statistical tests on the performance of simulated annealing (SA), genetic algorithm (GA), particle swarm optimization (PSO), and differential evolution (DE), when used for electroencephalographic (EEG) source localization.
Diana Irazú Escalona-Vargas +5 more
wiley +1 more source
FEM-DEM simulation of Uniaxial Compressive Strength (UCS) laboratory tests
REM: International Engineering Journal, 2020 Finite/discrete element methods (FDEM) are hybrid numerical models that use algorithms to analyze the transition from continuous to discontinuous. This type of formulation allows modeling physical laboratory tests with greater proximity to reality.
Michel Melo Oliveira +2 more
doaj +1 more source
Host Cell Signalling and Leishmania Mechanisms of Evasion
Journal of Tropical Medicine, Volume 2012, Issue 1, 2012., 2012 Leishmania parasites are able to secure their survival and propagation within their host by altering signalling pathways involved in the ability of macrophages to kill pathogens or to engage adaptive immune system. An important step in this immune evasion process is the activation of host protein tyrosine phosphatase SHP‐1 by Leishmania. SHP‐1 has been
Marina Tiemi Shio +8 more
wiley +1 more source
EROSIÓN POR LABRANZA CON ARADO DE DISCO EN SUELOS VOLCÁNICOS DE LADERA EN COSTA RICA
Agronomía Costarricense, 2009 Este trabajo midió el movimiento de suelo por labranza y erosión al utilizar el arado de disco, el implemento de labranza primaria más común en la región cultivada en las faldas del volcán Irazú.
Guy R. Mehuys +4 more
doaj +3 more sources