Results 41 to 50 of about 194,053 (216)
Shock and Vibration, 2017 Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the ...
Peng Li +3 more
doaj +1 more source
Journal of Civil Engineering and Management, 2011 In underground works, the continual consciousness of geological and geomechanical properties of rock mass during drilling, is of major importance to optimize the works and the equipment used.
Susana Torno +4 more
doaj +1 more source
Picosecond laser microvia drilling of ABF material using MHz burst mode
Materials Research Express, 2023 We report on a comprehensive study of laser percussion microvia drilling of Ajinomoto build-up film (ABF) material using an ultrashort pulsed laser in MHz burst mode.
Daniel Franz +7 more
doaj +1 more source
Mercury cycling during the last glacial period in Arctic Lake El'gygytgyn, NE Russia
Journal of Quaternary Science, EarlyView.ABSTRACT Tectonic processes play a key role in the global mercury (Hg) cycle on geological timescales, by mobilising Hg from deep Earth reservoirs to the surface. These natural fluxes also introduce a dynamic component to the terrestrial Hg cycle that can interact with other environmental signals and influence Hg delivery to sedimentary records.
Alice R. Paine +7 more
wiley +1 more source
External Electric Field-Assisted Laser Percussion Drilling for Highly Reflective Metals
Advances in Mechanical Engineering, 2013 In this study, an external electric field was employed during the laser percussion drilling on highly reflective materials. The laser-produced plasma was sputtered substantially, and the charged ions in the plasma plume were drawn by the electrodes ...
Chao-Ching Ho +4 more
doaj +1 more source
Energy Reports, 2021 In the present study, a 3D FEM of compound percussive system considering a loading–unloading cycle was employed to simulate the dynamic single-cutter-rock interaction.
Yumei Li +4 more
doaj +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello +2 more
wiley +1 more source
Dynamic Analysis of Percussion Drilling System under Harmonic Impact
Shock and Vibration, 2021 As a new efficient rock-breaking technology, harmonic impact drilling technology has received great attention, but the research on its rock-breaking mechanism is insufficient, which limits its development.
Yijin Zeng +4 more
doaj +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Can a good death occur for those who balance on the edges of grievability? In Bali, where death marks a transition within the cycles of reincarnation, a good death depends on the mortuary care performed by intimate others – care that may be foreclosed to those whose lives are shaped by stigma.
Sylvia Tidey
wiley +1 more source