Results 101 to 110 of about 332,036 (332)

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Outils pour l’identification des paramètres de raideur des robots à l’aide d’un logiciel de CAO [PDF]

, 2014
This report proposes a CAD-based approach for identification of the elasto-static parameters of the robotic manipulators. The main contributions are in the areas of virtual experiment planning and algorithmic data processing, which allows to obtain the ...
KLIMCHIK, Alexandr, PASHKEVICH, Anatol
core   +1 more source

Momentum Control of Humanoid Robots with Series Elastic Actuators

, 2017
Humanoid robots may require a degree of compliance at the joint level for improving efficiency, shock tolerance, and safe interaction with humans. The presence of joint elasticity, however, complexifies the design of balancing and walking controllers ...
Nava, Gabriele, Nori, Francesco, Pucci, Daniele   +2 more
core   +1 more source

Differential Spiral Joint Mechanism for Coupled Variable Stiffness Actuation

, 2023
In this study, we present the Differential Spiral Joint (DSJ) mechanism for variable stiffness actuation in tendon-driven robots. The DSJ mechanism semi-decouples the modulation of position and mechanical stiffness, allowing independent trajectory tracking in different parameter space. Past studies show that increasing the mechanical stiffness achieves
Kim, Mincheol, Deshpande, Ashish
openaire   +2 more sources

Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s

Advanced Functional Materials, EarlyView.
Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu, Xiaofeng Zheng, Shaoxia Zhang, Long Xu, Meng Liu, Jeremy Baribeault St‐Germain, Yue Zhao   +6 more
wiley   +1 more source

Entropic forces generated by grafted semiflexible polymers [PDF]

, 2005
The entropic force exerted by the Brownian fluctuations of a grafted semiflexible polymer upon a rigid smooth wall are calculated both analytically and by Monte Carlo simulations.
A. Abramowitz, Azam Gholami, D. Bray, E. Frey, Erwin Frey, J. F. Marko, Jan Wilhelm, L. D. Landau, N. Saito, O. Kratky, R. Hansen, W. Helfrich   +11 more
core   +3 more sources

In Situ 3D Bioprinting: Impact of Cross‐Linking on the Adhesive Properties of Hydrogels

Advanced Functional Materials, EarlyView.
In situ 3D bioprinting enables the direct deposition of cell‐laden, adhesive biomaterials for on‐site tissue regeneration. This review provides a comprehensive overview of how cross‐linking influences the bioadhesive properties of hydrogels used in 3D bioprinting, highlighting cross‐linking triggers, bioadhesion mechanisms, polymer interpenetration ...
Odile Romero Fernandez, Mulazim Hussain Asim, Shumaila Arshad, Gergely Kali, Andreas Bernkop‐Schnürch   +4 more
wiley   +1 more source

Tough Injectable Hydrogels Enabled by Integrating Rigid Homogeneous Framework With Flexible Chains

Advanced Functional Materials, EarlyView.
Tough injectable hydrogels are constructed by integrating a rigid, homogeneous hyaluronic acid framework with flexible long‐chain connectors. This framework–flexible structure simultaneously enhances network uniformity and promotes effective energy dissipation by enlarging plastic deformation zones under compression.
Rijian Song, Runqi Zhu, Cameron Milne, Melissa Johnson, Chunyu Zhao, Qiang Geng, Yinghao Li, Jing Lyu, Qiang Li, Sigen A, Wenxin Wang   +10 more
wiley   +1 more source

Highly Conductive and Stretchable Photothermal CuSe Fiber for Wearable Electronics and Implantable Drug Release Systems

Advanced Functional Materials, EarlyView.
The conductive and stretchable photothermal CuSe fiber is fabricated for versatile biomedical applications. This CuSe fiber functions as a reliable wearable strain sensor and heater due to its high conductivity, stretchability and photothermal efficiency.
Kukro Yoon, Yukye Lee, Sang Ki Rhee, Hyeonjoo Park, Kyowon Kang, Mingyu Sang, Byeonggwan Kim, Jung Seung Lee, Jaehong Lee, Taeyoon Lee   +9 more
wiley   +1 more source

The 3D version of the finite element program FESTER [PDF]

, 1992
In this report, a detailed description of the 3-D version finite element pro-gram FESTER is given. This includes: 1. A brief introduction to the package FESTER; 2. Preparing an input data file for the 3D version of FESTER; 3.
Qu, R, Reed, M B
core