Results 81 to 90 of about 141,212 (290)

Push-and-Twist Drillstring Assemblies [PDF]

, 2017
Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Firstbrook, David G., Harkness, Patrick, Li, Xuan, Lucas, Margaret, Timoney, Ryan, Worrall, Kevin   +5 more
core  

In Situ Characterisation of Hydrogels via Dynamic Interface Printing

Advanced Science, EarlyView.
ABSTRACT Hydrogels have become pivotal materials for tissue engineering, robotics, biomedical devices, and sensing applications due to their diverse material compositions and tunable mechanical properties. While significant effort has focused on developing novel manufacturing approaches such as extrusion bioprinting and light‐based fabrication methods,
Callum Vidler, Michael Halwes, David J. Collins   +2 more
wiley   +1 more source

The influence of flushing fluids rheological properties on rock breaking efficiency when drilling wells by pellet impact drilling method [PDF]

Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, 2021
Introduction. Pellet impact drilling method which is basically the destruction of rocks by blows of pellets, has been studied by many researchers. Despite this, the rheological properties of the drilling fluid used in pellet impact drilling have not been investigated yet. All bench and field tests were carried out using service water.
openaire   +1 more source

Bioerosion on shore platforms developed in the Waitemata Formation, Auckland [PDF]

, 1968
Bioerosion - the removal of lithic substrate by the erosive activities of living organisms- has not previously been discussed for New Zealand shore platforms.
Healy, T.R.
core   +1 more source

GPCRs in CAR‐T Cell Immunotherapy: Expanding the Target Landscape and Enhancing Therapeutic Efficacy

Advanced Science, EarlyView.
Chimeric antigen receptor T cell therapy faces dual challenges of target scarcity and an immunosuppressive microenvironment in solid tumors. This review highlights how G protein‐coupled receptors can serve as both novel targets to expand the therapeutic scope and functional modules to enhance CAR‐T cell efficacy.
Zhuoqun Liu, Yuchen Xiao, Yamin Zhao, Lihe Dai, David J.H. Shih, Shikang Liang, Honglei Tian, Liu Liu, Feng Tian, Bing Liu, Lei Chang, Chao Zhang   +11 more
wiley   +1 more source

Using Concept Maps to Plan an Introductory Structural Geology Course [PDF]

, 2004
This report presents the results of incorporating constructivist methods, including concept maps, into an undergraduate structural geology curriculum. A concept map is a visual representation of concepts and their relationship to each other in a body of ...

core   +1 more source

Discovery of an Adaptive Neuroimmune Response Driving Itch and Fast Tick Removal with Implications for Preventing Pathogen Transmission

Advanced Science, EarlyView.
Itch‐induced tick removal (IITR): An acquired neuroimmune mechanism, itch‐induced tick removal, develops after repeated tick exposure, mobilizing T cells and macrophages at the tick bite site to trigger a rapid scratching response that facilitates timely tick removal within a critical window that precedes the transmission of many tick‐borne pathogens ...
Johannes S. P. Doehl, Tiago D. Serafim, Serena Doh, Charles S. Grugan, Eva Iniguez, Luana Rogerio, Ronja Frigard, Ranadhir Dey, Pedro Cecilio, Xinglong Gu, Pang‐Yen Tseng, Aline da Silva Moreira, Mahnaz Minai, James Oristian, Hans Ackerman, Steven Brooks, Caroline Percopo, Siu‐Ping Ng, Derron A. Alves, Lucas Tirloni, Jennifer M. Anderson, Adriana Marques, Fabiano Oliveira, Shaden Kamhawi, Daniel E. Sonenshine, José M. C. Ribeiro, Mark Hoon, Jesus G. Valenzuela   +27 more
wiley   +1 more source

Laboratory Experimental Study on Rock Breaking Efficiency and Stability of PDC Bit

Shiyou jixie, 2020
In order to evaluate the rock breaking efficiency and stability of the newly developed PDC bit in the target lithologic formation, and guide the optimization, improvement and efficient use of the newly developed PDC bit, full scale laboratory rock ...
Zhang Jiawei, Meng Zhao, Ji Guodong, Cui Meng, Wang Haige, Yang Xiongwen, Yu Lianjie   +6 more
doaj  

Enhancing CO2 Injection Efficiency: Rock-Breaking Characteristics of Particle Jet Impact in Bottom Hole

Atmosphere
Storing CO2 in oil and gas reservoirs offers a dual benefit: it reduces atmospheric CO2 concentration while simultaneously enhancing oil displacement efficiency and increasing crude oil production. This is achieved by injecting CO2 into producing oil and gas wells.
Yi Wang, Jian Zhao
openaire   +2 more sources

IMPACT OF A COSMIC BODY INTO EARTH'S OCEAN AND THE GENERATION OF LARGE TSUNAMI WAVES: INSIGHT FROM NUMERICAL MODELING

, 2010
17/06/13 meb. .
Anderson, Artemieva, Artemieva, Bahlburg, Baldwin, Baldwin, Benson, Bland, Bland, Century Dynamics, Inc., Chyba, Collins, Collins, Collins, Crawford, Davison, Dence, Dienes, Elbeshausen, Engel, Engel, French, G. S. Collins, Gault, Gault, Gault, Gersonde, Giorgini, Gisler, Gisler, Gisler, Gittings, Glasstone, Glimsdal, Hills, Hills, Holsapple, Holsapple, Holsapple, Housen, Ivanov, Ivanov, K. Wünnemann, Kenkmann, Korycansky, Korycansky, Kyte, Landau, Lindström, Lindström, Lynett, Lynett, Lynett, Lyon, Mader, McGlaun, McKinnon, Melosh, Melosh, Melosh, Milner, Milner, Near-Earth Object Science Definition Team, Neukum, O'Keefe, O'Keefe, Okal, Olevson, Ormö, Ormö, Ormö, Peregrine, Pierazzo, Pierazzo, R. Weiss, Schmidt, Schmidt, Shuvalov, Shuvalov, Shuvalov, Shuvalov, Shuvalov, Stöffler, Synolakis, Thompson, Tillotson, Titov, Toon, van Dorn, von Dalwigk, Ward, Ward, Ward, Weiss, Weiss, Worthington, Worthington, Wünnemann, Wünnemann, Wünnemann, Wünnemann   +100 more
core   +1 more source