Results 71 to 80 of about 1,753,793 (305)

Linear perturbations of the Bloch type of space-periodic magnetohydrodynamic steady states. I. Mathematical preliminaries

open access: yesRussian Journal of Earth Sciences, 2023
We consider Bloch eigenmodes in three linear stability problems: the kinematic dynamo problem, the hydrodynamic and MHD stability problem for steady space-periodic flows and MHD states. A Bloch mode is a product of a field of the same periodicity, as the
Chertovskih R, Zheligovsky V
doaj   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

open access: yesDeep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang   +4 more
wiley   +1 more source

Earthquake Prediction [PDF]

open access: yes, 2017
Every new earthquake disaster revives the idea of earthquake prediction, the idea which was considered a few decades ago as a fantasy scientific endeavor.
Karnik, Vit, Khaled Ghaedi
openaire   +3 more sources

Applying the Coulomb Failure Function with an optimally oriented plane to the 2008 Mw 7.9 Wenchuan earthquake triggering [PDF]

open access: yes, 2010
The Coulomb failure function (CFF) quantitatively describes static stress changes in secondary faults near the source fault of an earthquake. CFF can be employed to monitor how static stress transfers and then shed some light on the probability of ...
Xu, C., Li, Z., Wang, J., Drummond, J.
core   +1 more source

Failure characteristics analysis of the inclined interlayer during water‐soluble cavity construction of underground salt caverns for large‐scale energy storage

open access: yesDeep Underground Science and Engineering, EarlyView.
In the process of water‐soluble cavern construction of salt cavern energy storage, since the interlayer does not dissolve in water easily, sudden collapse will cause engineering accidents such as bending and damage of the inner tube of the cavern.
Zenghui Zhao   +5 more
wiley   +1 more source

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

open access: yesDeep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand   +5 more
wiley   +1 more source

Earthquake prediction

open access: yesBulletin of the New Zealand Society for Earthquake Engineering, 1978
The study of precursory phenomena shows increasing promise as a basis for earthquake prediction. Long-range forecasting can be expected to reduce by a large factor the uncertainty of estimates based on the historical record, and also to facilitate the development of short-range forecasting.
openaire   +3 more sources

Stationarity of aftershock activities of the 2016 Central Tottori Prefecture earthquake revealed by dense seismic observation

open access: yesEarth, Planets and Space, 2020
To clarify the relationship between earthquake occurrence and fluid, we analyzed data from a dense aftershock-observation network with 69 high-gain short-period seismographs installed immediately after the mainshock occurrence (October 21) in the ...
Yoshihisa Iio   +14 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

open access: yesDeep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li   +7 more
wiley   +1 more source

Russian Scientific Experience of Using Web-based Geoinformation Systems in Seismology

open access: yesRussian Journal of Earth Sciences
Web GIS technologies are widely used to present the results of scientific geospatial projects in a range of thematic areas. Monitoring of tectonic processes and seismic activity, construction and updating of seismic hazard maps and seismic risk maps at ...
Podolskaia Ekaterina   +3 more
doaj   +1 more source

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