Results 11 to 20 of about 124,564 (297)

Crater formation during raindrop impact on sand [PDF]

open access: yes, 2017
After a raindrop impacts on a granular bed, a crater is formed as both drop and target deform. After an initial, transient, phase in which the maximum crater depth is reached, the crater broadens outwards until a final steady shape is attained.
de Jong, Rianne   +2 more
core   +4 more sources

Updates to Concepts on Phreatomagmatic Maar-Diatremes and Their Pyroclastic Deposits

open access: yesFrontiers in Earth Science, 2017
Recent work is changing our understanding of phreatomagmatic maar-diatreme eruptions and resulting deposits. In previous models, explosions were often inferred to take place only at the base of a diatreme, with progressive downward migration due to a ...
Greg A. Valentine   +4 more
doaj   +1 more source

Complex of Geophysical Studies of the Seyakha Catastrophic Gas Blowout Crater on the Yamal Peninsula, Russian Arctic

open access: yesGeosciences, 2020
This article describes the main results of two Arctic expeditions in 2017–2018 to study the Seyakha Crater in the north of Western Siberia, Yamal Peninsula.
Vasily Bogoyavlensky   +3 more
doaj   +1 more source

Surrogate-based optimization of a cratered cylindrical hole to enhance film-cooling effectiveness

open access: yesJournal of Thermal Science and Technology, 2016
A cratered film-cooling hole was investigated to determine the effect of shape parameters on film-cooling performance, and shape of the hole was optimized to improve film-cooling effectiveness.
Jun-Hee KIM, Kwang-Yong KIM
doaj   +1 more source

Two gamma quarkonium and positronium decays with Two-Body Dirac equations of constraint dynamics [PDF]

open access: yes, 2007
Two-Body Dirac equations of constraint dynamics provide a covariant framework to investigate the problem of highly relativistic quarks in meson bound states.
Cheuk-Yin Wong   +3 more
core   +2 more sources

Peningkatan kegiatan Gunung Api Tangkubanparahu Jawa Barat pada bulan April 2005

open access: yesIndonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol1no4.20063Tangkubanparahu is an active strato volcano located in West Java lying about 30 km to the north of Bandung City. Its crest is 2084 m above the sea level.
Isya Nurrahmat Dana   +4 more
doaj   +1 more source

Steam and plasma bubble evolution on laser treating of a sample being in liquid

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2021
An object of investigation is pointed - the metal articles being in water and exposed to pulse laser treating. The purpose of research was the investigation of the processes occurring near the metal target treated by pulse laser radiation with flux ...
S. V. Vasiliev   +3 more
doaj   +1 more source

Vision‐based crater and rock detection using a cascade decision forest

open access: yesIET Computer Vision, 2019
Both crater and rock detection are components of the autonomous landing and hazard avoidance technology (ALHAT) sensor suite, as craters and rocks represent the majority of landing hazards.
Yunfeng Yan, Donglian Qi, Chaoyong Li
doaj   +1 more source

Modeling of Material Removal Rate and Surface Roughness Generated during Electro-Discharge Machining

open access: yesMachines, 2019
This study reports on the numerical model development for the prediction of the material removal rate and surface roughness generated during electrical discharge machining (EDM).
Amin Razeghiyadaki   +3 more
doaj   +1 more source

Relativistic Generalization of the Post-Prior Equivalence for Reaction of Composite Particles [PDF]

open access: yes, 2001
In the non-relativistic description of the reaction of composite particles, the reaction matrix is independent of the choice of post or prior forms for the interaction.
Crater, Horace W., Wong, Cheuk-Yin
core   +2 more sources

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