Results 71 to 80 of about 194,053 (216)

Sedimentology and geochemistry of the recent sediments of the river system on Hurd Peninsula, Livingston Island, Antarctica

open access: yesThe Depositional Record, Volume 12, Issue 4, September 2026.
This study investigates the sedimentology and geochemistry of recent sediments from ephemeral river systems on Hurd Peninsula, Livingston Island, Antarctica. These systems are important for understanding sedimentary and geochemical processes in unique polar environments.
Yakup Çelik   +2 more
wiley   +1 more source

(Un)threading Rhythms: On Affect and Vibe in a Rave

open access: yesAnthropology of Consciousness, Volume 37, Issue 2, Fall 2026.
ABSTRACT In Toronto, raves arise across large nightclubs, DIY venues and outdoors, despite changing regulations that have further arranged and narrowed their possibility in the past 4 years. Following a rave in Toronto, this work explores ways that potentialities and affects emerge in a single night, through my entry of taking part in dancing and ...
Tatiana Yunadi
wiley   +1 more source

Structural Design and Motion Behavior Analysis of Composite Percussion Drilling Tool

open access: yesShiyou jixie, 2019
The high strength, poor drillability and strong breaking-resistance of deep complex hard formation rocks often result in stick-slip vibration and premature wear of the PDC bit.
Wang Wei   +4 more
doaj  

Effect of defocused plane on entrance and exit hole geometry of high grade steel 18CrNi8 during percussion drilling by Nd:YAG millisecond laser system

open access: yesMaterials Research Express, 2020
Modern manufacturing industries prefer laser drilling processes owing to the adequate controlled drilling in comparison with existing alternatives. The presented experimental study mainly accounts defocusing impact along with other technical parameters ...
Saad Nawaz   +7 more
doaj   +1 more source

Implementing Automation: The Shopfloor Politics of Technological Change in the Canadian Aerospace Sector

open access: yesBritish Journal of Industrial Relations, Volume 64, Issue 3, Page 467-479, September 2026.
ABSTRACT What are the social processes of integrating new production technologies into existing work processes? How do management and trade union approaches shape the implementation and debugging of new technologies on the shopfloor? Drawing on the industrial relations literature on debugging and four cases of technological change at a major Canadian ...
Daniel Nicholson
wiley   +1 more source

Study of the local forces along a drill edge – comparison of two methodologies [PDF]

open access: yes, 2013
In aerospace applications, drilling is one of the most common operations. However, this machining stays complex and expensive, especially in hard to cut materials. Because of the closed aspect of the operation, the measure or evaluation of the phenomenon
M'SAOUBI, Rachid   +4 more
core  

Improving gas bubbles’ half life in foam drilling fluid [PDF]

open access: yes, 2013
An underbalanced drilling using foam drilling fluid is one of the most effective solutions which are capable of preventing formation damage, differential sticking, or circulation lost.
Ismail, Ahmad Shamsulizwan   +6 more
core   +1 more source

Effective Geothermal Utilisation close to the surface by the TT-Geothermal Radial Drilling (GRD-)Method [PDF]

open access: yesActa Montanistica Slovaca, 2007
In the late 1970-Years, Tracto-Technik developped a very effective radial-shaped percussion system for a geothermal heating, the ECOtherm-System, which was very well accepted by customers.
Hans-Joachim Bayer
doaj  

Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling

open access: yesPetroleum Science, 2019
For improving the hole-enlarging capability, roundness and rock-breaking efficiency of the nozzle in radial jet drilling, a new structure of self-rotating nozzle was put forward.
Hua-Lin Liao   +5 more
doaj   +1 more source

University Percussion Ensemble, December 4, 1974

open access: yes, 2017
Recorded during a live performance at Oakland Recital Hall, Western Michigan University, Kalamazoo, Michigan, December 4, 1974, as part of the Festival of new music, Department of Music’s 1974-1975 season.University Percussion Ensemble, Don Baker ...
Western Michigan University. Percussion Ensemble
core  

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