Results 121 to 130 of about 44,630 (308)

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

Low-noise, high-strength, spiral-bevel gears for helicopter transmissions [PDF]

Improvements in spiral-bevel gear design were investigated to support the Army/NASA Advanced Rotorcraft Transmission program. Program objectives were to reduce weight by 25 percent, reduce noise by 10 dB, and increase life to 5000 hr mean-time-between ...
Handschuh, Robert F., Henry, Zachary S., Lewicki, David G., Litvin, Faydor L.   +3 more
core   +1 more source

Pure Chitosan Microfluidic Spinning Affords Modular Core‐Sheath Fibers and Hand‐Crafted Scaffolds with Enhanced Fibroblast Compatibility

Small, EarlyView.
Microfluidic Wet Spinning affords highly resilient and biocompatible microfibers of pure chitosan without the use of any crosslinker. We produced microfibers both sheath and core of made of chitosan and another version with a chitosan sheath and chitin nanocrystals in the core.
Ishneet Kaur, Alejandro Forigua, Hatem M. Titi, Yonatan Morocz, David Juncker, Christopher Moraes, Audrey Moores   +6 more
wiley   +1 more source

Loaded Tooth Contact Characteristic Analysis of Multi-gear for Planetary Transmission [PDF]

Journal of Mechanical Engineering, 2019
LIU Hongmei, FANG Zongde, JIANG Jinke
openaire   +1 more source

Conductive Hydrogel‐Enabled Electrode for Scalp Electroencephalography Monitoring

Small Methods, EarlyView.
Conductive hydrogels are emerging as effective EEG electrode‐scalp interfaces to overcome hair barriers. This review presents the demanding parameters for hair‐compatible hydrogel electrodes and summarizes their applications in healthcare and brain‐computer interfaces.
Zichong Ji, Leqi Li, Meiqiong Zheng, Xinyuan Ye, Wenqing Yan, Zonglei Wang, Yi Liu, Yuli Wang, Yujie Zhang, Pengcheng Zhou, Jiawei Yang, Mingzhe Wang, Shihong Lin, Hossam Haick, Yan Wang   +14 more
wiley   +1 more source

Research on the sliding friction associated spur-face gear meshing efficiency based on the loaded tooth contact analysis. [PDF]

PLoS One, 2018
Dong H, Liu ZY, Duan LL, Hu YH.
europepmc   +1 more source

Engineering analysis and test results of the pre-stage planetary gear trains for wrist rotation and pitch assembly and azimuth and elevation assembly of the extendable stiff arm manipulator kit assembly [PDF]

In order to improve the performance capability of the Extendable Stiff Arm Manipulator (ESAM) it was necessary to increase the overall gear ratio by a factor of approximately four.
Morris, R. N.
core   +1 more source

Unilateral mastication‐induced memory deficits linked to disrupted hippocampal cholesterol metabolism in rats

VIEW, EarlyView.
Unilateral mastication, a common oral habit, induces cognitive decline in rats by disrupting hippocampal cholesterol metabolism. It triggers astrocyte hyperplasia, enhances cholesterol synthesis, impairs transport/degradation, and reduces 24‐hydroxycholesterol (24‐OHC), ultimately damaging synaptic function.
Xiaoting Zhai, Yifan Hu, Rongchen Xu, Xinyu Xu, Bowen Ma, Dongzong Huang, Hongchen Liu, Hongbo Li, Yuan Hu, Hua Jiang   +9 more
wiley   +1 more source

Analysis of meshing performance of face gear with full tooth surface modification

Jixie chuandong
ObjectiveTo investigate the influence of a modified tooth surface on the meshing performance of face gear pair, a full tooth surface modification method for face gear was proposed to optimize their meshing performance.MethodsFirstly, the standard tooth ...
HE Kun, CHEN Yongquan, DU Yanbin, LI Ronghao   +3 more
doaj  

Quantitative micro‐XRF combined with X‐ray imaging reveals correlations between Zn concentration and dentin tubule porosity across entire teeth

VIEW, EarlyView.
The combination of calibrated micro‐CT and quantitative micro‐XRF measurement facilitates the correlation of density and composition in the 3D macro‐structure of teeth. Zn concentration in dentin increases by a factor of 10 toward the pulp. Incidentally, the overall density decreases, showing an association between Zn and the dentin tissue porosity ...
Ioanna Mantouvalou, Leona Johanna Bauer, Vinh‐Binh Truong, Yannick Wagener, Frank Förste, Oleksandra Marushchenko, Stephan Werner, Franco Lizzi, Frank Wieder, Timo Wolff, Birgit Kanngießer, Paul Zaslansky   +11 more
wiley   +1 more source