Results 21 to 30 of about 102,518 (199)

A Review of Advancements in Inspection, Manufacturing and Repair, and Robots for On-Orbit Servicing, Assembly, and Manufacturing (OSAM) of Spacecraft

Aerospace
Since the first successful on-orbit repair mission in 1984 to the Solar Maximum Mission (SMM) satellite, considerable progress has been made in the field of On-orbit Servicing, Assembly, and Manufacturing (OSAM) of spacecraft using either human-guided or
Kayla Dremann, Motaz Hassan, Isabelle Davis, Ashton Vicente Orosa, Natasha Ninan, Ajay Mahajan, Xiaosheng Gao, Siamak Farhad   +7 more
doaj   +1 more source

Design and Dynamic Control: A Free-Flying Space Robot Inspired by Water Striders

Biomimetics, 2023
This work designed a free-flying space robot (FFSR) that simulates the on-orbit assembly of large space telescopes, drawing inspiration from the flexible movement of water striders on water surfaces.
Huayang Sai, Chengkai Xia, Zhenbang Xu, Hang Li   +3 more
doaj   +1 more source

Improved Uncalibrated Visual Servo Strategy for Hyper-Redundant Manipulators in On-Orbit Automatic Assembly

Applied Sciences, 2020
Aiming at on-orbit automatic assembly, an improved uncalibrated visual servo strategy for hyper-redundant manipulators based on projective homography is proposed.
Jinlin Gu, Mingchao Zhu, Lihua Cao, Ang Li, Wenrui Wang, Zhenbang Xu   +5 more
doaj   +1 more source

Manufacturing Space Homogeneity in Additive Manufacturing – Electron Beam Melting Case

Strojniški vestnik - Journal of Mechanical Engineering, 2017
This paper focuses on the manufacturing space homogeneity of the electron beam melting (EBM) technology. An Arcam AB A1 machine is used as tool for experimentations, with titanium (Ti-6Al-4V) as material. The objective of this study is to show the correlation between workpieces geometrical deformations and their position in the manufacturing space ...
Piaget, Alexandre, Museau, Matthieu, Paris, Henri   +2 more
openaire   +3 more sources

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

Novel Pointing and Stabilizing Manipulator for Optical Space Payloads

Applied Sciences, 2023
Considering that the Line-Of-Sight (LOS) of a small optical payload is mainly connected with the angular motions while insensitive to linear motion, a novel pointing and stabilizing manipulator was proposed for small payloads on a large spacecraft.
Hui Zhang, Zhenbang Xu, Anpeng Xu, Enyang Zhang   +3 more
doaj   +1 more source

Export of miRNAs from activated macrophages is cooperative and HuR‐dependent

FEBS Letters, EarlyView.
This study uncovers a new mechanism for miRNA export regulation in mammalian cells, driven by the RNA‐binding protein HuR. In macrophages, HuR cooperatively binds with miRNAs to export both low‐ and high‐affinity substrates, thereby influencing macrophage activation.
Syamantak Ghosh, Kamalika Mukherjee, Suvendra N. Bhattacharyya   +2 more
wiley   +1 more source

Manufacturing process of water-soluble salt-based ceramic cores based on vat photopolymerization

Journal of Advanced Ceramics
Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical stability. In this work, vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for the first time.
Yuzhen Zhang, Wenyan Duan, Yue Gu, Xingyao Sun, Shan Li, Bingshan Liu, Gong Wang   +6 more
doaj   +1 more source

Contact-Free Support Structures for Part Overhangs in Powder-Bed Metal Additive Manufacturing

Inventions, 2017
This study investigates the feasibility of a novel concept, contact-free support structures, for part overhangs in powder-bed metal additive manufacturing.
Kenneth Cooper, Phillip Steele, Bo Cheng, Kevin Chou   +3 more
doaj   +1 more source

Modeling of grinding chip thickness distribution based on material removel mode in grinding of SiC ceramics

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2020
Grinding chip thickness is an important parameter to reflect the grinding efficiency and investigate the grinding mechanism. Modeling of the chip thickness is generally based on a certain stochastic distribution model, like Uniform, Gaussian or Rayleigh ...
Chongjun WU, Wanjiao DONG, Lijian ZHU, Jian ZHANG, Lijun XU, Steven Y LIANG   +5 more
doaj   +1 more source