Results 31 to 40 of about 729,138 (319)

Thallium Isotopes Reveal Brine Activity During Carbonatite Magmatism

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Carbonatite volcanism remains poorly understood compared to silicic volcanism due to the scarcity of carbonatite volcanoes worldwide and because volcanic H2O and CO2—major components in carbonatite volcanic systems—are not well preserved in the rock ...
Forrest Horton   +4 more
doaj   +1 more source

Oceanographic and underwater acoustics research conducted during the period 1 May 1961-31 October 1961 [PDF]

open access: yes, 1962
Research during this six month period was performed during cruises of the CHAIN to the Romanche Trench, to the Puerto Rico Trench, and to the Mediterranean Sea, and during a cruise of the BEAR to the Gulf of Maine.
Woods Hole Oceanographic Institution, /
core   +1 more source

Giant holes [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2010
We study the semiclassical spectrum of excitations around a long spinning string in AdS_3. In addition to the usual small fluctuations, we find the spectrum contains a branch of solitonic excitations of finite energy. We determine the dispersion relation for these excitations. This has a relativistic form at low energies but also matches the dispersion
Nick Dorey, Manuel Losi
openaire   +2 more sources

Experimental study on Brazilian splitting of phyllite under the coupling effects of water, pore and bedding

open access: yesRock and Soil Mechanics, 2021
Phylite is widely distributed in southwest of China. Factors such as groundwater, bedding, micro-pores and micro-cracks will weaken its mechanical properties to some extent, thus posing severe challenges to the stability of the related projects ...
ZHANG Chuang   +3 more
doaj   +1 more source

Image of Shamanic Cosmos in Cyprus Turkish Folktales / Kıbrıs Türk Masallarında Şamanistik Evren Tasavvuru [PDF]

open access: yesFolklor/Edebiyat, 2016
From mythology to celestial religions, cosmos is conceived of three parts. These are the sky where good gods are in, the earth where people live in and the underworld where bad gods and spirits are in. The sky is made up seven, nine or seventeen layers
Kadriye Türkan*
doaj  

Mechanisms formation of electron-hole trap centers in LiKSO4 crystall

open access: yesEurasian Journal of Physics and Functional Materials, 2021
The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy.
T.N. Nurakhmetov   +9 more
doaj   +1 more source

Optimal Hole Shapes in Composite Structural Elements Considering Their Mechanical and Strength Anisotropy

open access: yesApplied Sciences
A method for selecting the optimal shape of holes, taking into account the strength anisotropy of composites, is proposed. The methodology includes the following: an algorithm for stress determination based on singular integral equations and Green’s ...
Wojciech Skarka   +3 more
doaj   +1 more source

Energy transfer of intrinsic electronic excitation to impurities in the CaSO4 − Mn crystal

open access: yesEurasian Journal of Physics and Functional Materials, 2021
The nature of the impurity emission center and the energy transfer mechanisms from intrinsic electronic excitations to the Mn2+ impurity centers in the CaSO4 − Mn crystal have been investigated.
T.N. Nurakhmetov   +11 more
doaj   +1 more source

Determination the residual stresses in the surface layer of gas turbine engine parts by small hole drilling [PDF]

open access: yesМеталознавство та обробка металів, 2020
A methodology for measuring residual stresses based on drilling small diameter holes with subsequent fixation of deformation using a strain gauge as applied to thin-walled complex parts of gas turbine engines has been presented. It is known that the bulk
E.V. Vyshnepolskyi   +3 more
doaj   +1 more source

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