Results 131 to 140 of about 168,341 (157)

Integrating resource utilization and bioregenerative life support systems for sustainable space exploration. [PDF]

open access: yesFront Microbiol
Esposito M   +10 more
europepmc   +1 more source

First stage in technological production of Stone Age animal teeth pendants: evidence from Zvejnieki (Latvia) and wider social implications. [PDF]

open access: yesArchaeol Anthropol Sci
Macāne A   +8 more
europepmc   +1 more source

Ground characterization using breaking-action-based zoning analysis of rotary-percussive instrumented drilling

open access: yesInternational Journal of Rock Mechanics and Minings Sciences, 2015
In this article, we conducted in-situ rotary-percussive instrumented drilling monitoring and associated data analysis in parallel to determine weathering grades of rock mass and their corresponding spatial distribution. The influence of the mechanism of
Z Q Yue
exaly   +2 more sources

Numerical simulation of percussive drilling [PDF]

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, 2015
peer reviewedThis paper presents a novel dynamical model to analyze the long-term response of a percussive drilling system. This departs from existing approaches that usually consider a single activation and bit/rock interaction cycle for the analysis of
Vincent Denoël   +2 more
exaly   +2 more sources

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