Results 71 to 80 of about 7,360 (301)

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

Phenomenological 2D and 3D Models of Ductile Fracture for Girth Weld of X80 Pipeline

Buildings, 2023
Welding is the main method for oil/gas steel pipeline connection, and a large number of girth welds are a weak part of the pipeline. Under extremely complex loads, a steel pipeline undergoes significant plastic deformations and eventually leads to ...
Naixian Li, Bin Jia, Junhong Chen, Ying Sheng, Songwen Deng   +4 more
doaj   +1 more source

Rigid‐Flexible Coupling Units Enable Robust Large Birefringence

Advanced Science, EarlyView.
A rigid–flexible coupling strategy, combining flexible (S3)2− linear units with rigid (VO4)3− tetrahedra, yields Sr4(VO4)2S3—a robust crystal exhibiting large birefringence (Δn = 0.52@550 nm) and remarkable thermal, air, and water stability. ABSTRACT Birefringent crystals are central to polarization control in laser technologies (e.g., wave plates and ...
Jie Zhou, Yanqiang Li, Ji Qi, Weiqi Huang, Liangmeng Zhu, Zhiyong Bai, Yang Zhou, Junhua Luo, Sangen Zhao   +8 more
wiley   +1 more source

Light‑Driven Propulsion of Graphene Aerogels in Microgravity

Advanced Science, EarlyView.
Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab, Rami Elkaffas, Basel Altawil, Omar Alsuwaidi, Afnan Almubashir, Claire Perfetti, Shanavas Shajahan, Marco Braibanti, Sean Swei, Carlo Saverio Iorio, Yarjan Abdul Samad   +10 more
wiley   +1 more source

A Degradation Function Consistent with Cocks–Ashby Porosity Kinetics [PDF]

, 2018
The load carrying capacity of ductile materials degrades as a function of porosity, stress state and strain-rate. The effect of these variables on porosity kinetics is captured by the Cocks–Ashby model; however, the Cocks–Ashby model does not account for
Moore, John A.
core   +1 more source

Smart Flexible Tactile Sensors: Recent Progress in Device Designs, Intelligent Algorithms, and Multidisciplinary Applications

Advanced Intelligent Discovery, EarlyView.
Flexible tactile sensors have considerable potential for broad application in healthcare monitoring, human–machine interfaces, and bioinspired robotics. This review explores recent progress in device design, performance optimization, and intelligent applications. It highlights how AI algorithms enhance environmental adaptability and perception accuracy
Siyuan Wang, Ming Dong, Rongrong Bao, Caofeng Pan   +3 more
wiley   +1 more source

Loss of halo triaxiality due to bar formation [PDF]

, 2010
Cosmological N-body simulations indicate that the dark matter haloes of galaxies should be generally triaxial. Yet, the presence of a baryonic disc is believed to alter the shape of the haloes.
Allgood, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Bailin, Bailin, Bailin, Bellovary, Berentzen, Berentzen, Binney, Cole, Colín, Combes, Combes, Curir, Debattista, Debattista, Debattista, Dehnen, Dehnen, Dubinski, E. Athanassoula, Fasano, Franx, Frenk, Gadotti, Gerhard, Hayashi, Heller, Hernquist, Holley-Bockelmann, Jing, Jog, Kazantzidis, Lambas, Maciejewski, Maciejewski, Martinez-Valpuesta, Martinez-Valpuesta, Novak, O'Neill, Raha, Rix, Rodionov, Rubens E. G. Machado, Ryden, Ryden, Sellwood, Tissera, Trachternach, Valluri, Villa-Vargas, Warren, Widrow   +60 more
core   +2 more sources

New opportunities for bioscaffold‐enabled spinal cord injury repair

BMEMat, EarlyView.
Schematic illustration of bioscaffolds for spinal cord injury repair. We summarize the effects of bioscaffold properties on SCI repair, highlight different types of bioscaffolds, various fabrication strategies, and in vivo transformations for the clinical development of SCI‐repairing bioscaffolds.
Xiaoqing Qi, Yicheng Fu, Zhaoliang Su, Li Li, Subrata Chakrabarti, Peng Li, Yilun Wu, Fang Liu, Teng Gao, Zhifeng Dong, Lei Liu, Pei Cao   +11 more
wiley   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

Dynamical evolution and spin-orbit resonances of potentially habitable exoplanets. The case of GJ 581d [PDF]

, 2012
GJ 581d is a potentially habitable super-Earth in the multiple system of exoplanets orbiting a nearby M dwarf. We investigate this planet's long-term dynamics, with an emphasis on its probable final rotation states acquired via tidal interaction with the
Berghea, Ciprian, Efroimsky, Michael, Makarov, Valeri V.   +2 more
core   +1 more source