Results 81 to 90 of about 36,677 (300)

Swelling‐Programmed Topographical Guidance for Dynamic Spheroid Self‐Assembly via a Mechanochemical Hydrogel Niche

Advanced Functional Materials, EarlyView.
A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam, Seon Yeong Chae, Young Woo Kwon, Hye Jin Heo, Hye Rin Lee, Ji Hyeok Lee, Dong‐Wook Han, Yun Hak Kim, Suck Won Hong   +8 more
wiley   +1 more source

Compliance error compensation technique for parallel robots composed of non-perfect serial chains [PDF]

, 2012
The paper presents the compliance errors compensation technique for over-constrained parallel manipulators under external and internal loadings. This technique is based on the non-linear stiffness modeling which is able to take into account the influence
Chablat, Damien, Hovland, Geir, Klimchik, Alexandr, Pashkevich, Anatol   +3 more
core   +4 more sources

Robust Polymer Hydrogels Improve Electric‐Fish‐Inspired Batteries

Advanced Functional Materials, EarlyView.
ABSTRACT Electric‐fish‐inspired hydrogel batteries based on ion‐concentration gradients offer an attractive route to soft power sources; however, the poor mechanical properties of existing hydrogels limit device assembly and performance. Here, we report poly(ethylene glycol) methyl ether acrylate hydrogels that enable ion‐gradient batteries composed of
Nick Zahnd, Satyajit Das, John Marc C. Puguan, Carolina Pierucci, Michael Mayer, Christoph Weder   +5 more
wiley   +1 more source

A robust subspace based approach to feedforward control of broadband disturbances on a six-degrees-of-freedom vibration isolation set-up [PDF]

, 2005
The contribution of this paper is twofold. First, the paper introduces a novel hybrid vibration isolation approach which uses a combination of passive and active vibration control techniques to provide additional design freedom.
Dijk, J. van, Jonker, J.B., Nijsse, G., Super, H.   +3 more
core   +2 more sources

Multi‐Scale Interface Engineering of MXenes for Multifunctional Sensory Systems

Advanced Functional Materials, EarlyView.
MXenes, as two‐dimensional transition metal carbides and nitrides, demonstrate remarkable capabilities for multifunctional sensing applications. This review systematically examines multi‐scale interface engineering approaches that enhance sensing performance, enable diverse detection functionalities, and improve system‐level compatibility in MXene ...
Jiaying Liao, Sin‐Yi Pang, Jianhua Hao
wiley   +1 more source

A pneumatic particle-blocking variable-stiffness bending actuator

AIP Advances
This study introduces a variable-stiffness pneumatic bending actuator to enhance the stiffness of flexible robots. The bending actuator combines the working principles of a pneumatic drive, a wedge structure, and particle blockage.
He Peng, Xia Wang, Dexu Geng
doaj   +1 more source

Design and Characterization of Twisted and Coiled Polymers and Their Applications as Soft Actuators

IEEE Access
This study is an experimental investigation of twisted and coiled polymer actuators, focusing on characterization of the effects of design and operating parameters on the actuator performance. Using nylon-6 monofilaments, a custom fabrication and testing
Jacob Martin, Marc Doumit
doaj   +1 more source

Walking with a powered ankle-foot orthosis: the effects of actuation timing and stiffness level on healthy users

Journal of NeuroEngineering and Rehabilitation, 2020
Background In the last decades, several powered ankle-foot orthoses have been developed to assist the ankle joint of their users during walking. Recent studies have shown that the effects of the assistance provided by powered ankle-foot orthoses depend ...
Marta Moltedo, Tomislav Baček, Ben Serrien, Kevin Langlois, Bram Vanderborght, Dirk Lefeber, Carlos Rodriguez-Guerrero   +6 more
doaj   +1 more source

Compensated Current Injection circuit, theory and applications [PDF]

, 2002
This paper presents a detailed description, analysis and example of practical application of a wide frequency band voltage-to-current converter. The converter is characterized by a combination of positive and negative feedback loops.
Giorgio Fontana, Jafry Y., Lafargue L., Touboul P.   +3 more
core   +2 more sources

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

Advanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo, Artur Ciesielski, Paolo Samorì   +2 more
wiley   +1 more source