Results 161 to 170 of about 161,873 (336)

Acquisition and Retaining Granular Samples via a Rotating Coring Bit [PDF]

This device takes advantage of the centrifugal forces that are generated when a coring bit is rotated, and a granular sample is entered into the bit while it is spinning, making it adhere to the internal wall of the bit, where it compacts itself into the
Badescu, Mircea, Bar-Cohen, Yoseph, Sherrit, Stewart   +2 more
core   +1 more source

Construction of a Multitissue Cell Atlas Reveals Cell‐Type‐Specific Regulation of Molecular and Complex Phenotypes in Pigs

Advanced Science, EarlyView.
This research conducts an in‐depth investigation of cell‐type‐specific regulatory mechanisms underlying molecular and complex phenotypes through integrative analysis of multitissue single‐nucleus RNA sequencing, bulk RNA‐seq, and genome‐wide association study (GWAS) data in pigs.
Lijuan Chen, Houcheng Li, Jinyan Teng, Zhen Wang, Xiaolu Qu, Zhe Chen, Xiaodian Cai, Haonan Zeng, Zhonghao Bai, Jinghui Li, Xiangchun Pan, Leyan Yan, Fei Wang, Lin Lin, Yonglun Luo, Goutam Sahana, Mogens Sandø Lund, Maria Ballester, Daniel Crespo‐Piazuelo, Peter Karlskov‐Mortensen, Merete Fredholm, Alex Clop, Marcel Amills, Crystal Loving, Christopher K. Tuggle, Ole Madsen, Jiaqi Li, Zhe Zhang, George E. Liu, Jicai Jiang, Lingzhao Fang, Guoqiang Yi   +31 more
wiley   +1 more source

Hyperviscous Diabetic Bone Marrow Niche Impairs BMSCs Osteogenesis via TRPV2‐Mediated Cytoskeletal‐Nuclear Mechanotransduction

Advanced Science, EarlyView.
Diabetic bone marrow exhibits pathological ECM hyperviscosity that activates TRPV2‐mediated Ca2⁺ influx, leading to perinuclear F‐actin disassembly, nuclear deformation, and chromatin condensation. This cytoskeletal‐nuclear decoupling suppresses osteogenic differentiation of BMSCs.
Yao Wen, Xinhui Zheng, Jieliu Li, Minyu He, Dongqi Fan, Xingyu Zhu, Qiming Zhai, Liangjing Xin, Tao Chen   +8 more
wiley   +1 more source

Performance evaluation and selection of the core drill bits for lunar rock

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
The objective of this study is to systematically examine the drilling efficiency and performance of various core drill bits in lunar rock formation using the discrete element method (DEM) and drilling experiments conducted in a lunar vacuum environment ...
Xuan Wang, Yan Wu, Zheng Gao, Haichun Hao, Lang Zhou, Jiahua Li, Mingzhong Gao   +6 more
doaj   +1 more source

A novel neural-evolutionary framework for predicting weight on the bit in drilling operations [PDF]

, 2023
Masrour Dowlatabadi, Saeed Azizi, Mohsen Dehbashi, Hamed Sadeqi   +3 more
openalex   +1 more source

Single‐Field Evolution Rule Governs the Dynamics of Representational Drift in Mouse Hippocampal Dorsal CA1 Region

Advanced Science, EarlyView.
Long‐term hippocampal place‐code dynamics are investigated using calcium imaging across weeks of maze navigation. Analyses reveal a novelty‐irrelevant Single‐Field Evolution Rule (SFER), where active fields promote persistence and inactive fields decline.
Cong Chen, Shuyang Yao, Sihui Cheng, Jiayi Tian, Ang Li, Yusen Yan, Xiang Zhang, Yuanjing Liu, Yumeng Wang, Qichen Cao, Chenglin Miao   +10 more
wiley   +1 more source

Effect of Bit Type on Reactive Torque and Consequent Tool-face-control Anomalies

Shiyou jixie, 2017
In sliding drilling with bend house mud motor, given the same WOB, the reactive torque is greater and the directional drilling is more difficult if the drill bit is more aggressive.
Xu Lihui
doaj  

Optimizing Drill Bits Performance in Highly Unconfined Compressive Strength Formation, Sinai Oil Field, Egypt

, 2020
Ahmed Yasin, Prof. Shohdy El-Maghraby Shalby, Prof. Mohamed Shehata Farahat, Adel Mohamed Salem   +3 more
openalex   +1 more source

Numerical simulation study on the optimization design of the crown shape of PDC drill bit [PDF]

, 2013
Pei Ju, Zhenquan Wang, Zhai Ying-hu, Dongyu Su, Yunchi Zhang, Zhaohui Cao   +5 more
openalex   +1 more source

ROPEC - ROtary PErcussive Coring Drill for Mars Sample Return [PDF]

The ROtary Percussive Coring Drill is a light weight, flight-like, five-actuator drilling system prototype designed to acquire core material from rock targets for the purposes of Mars Sample Return. In addition to producing rock cores for sample caching,
Chu, Philip, Spring, Justin, Zacny, Kris
core   +1 more source