Results 91 to 100 of about 46,248 (301)

Mussel‐Inspired Molecular Strategies for Fabricating Functional Materials With Underwater Adhesion and Self‐Healing Properties

open access: yesAdvanced Materials, EarlyView.
This review systematically examines the nanomechanical mechanisms of mussel‐inspired molecular interactions, primarily investigated by direct force measurement techniques such as surface forces apparatus and atomic force microscopy. The macroscopic adhesive and self‐healing performances of mussel‐inspired functional materials, including coacervates ...
Pan Huang, Hongjian Zhang, Hongbo Zeng
wiley   +1 more source

Discretisations, Constraints and Diffeomorphisms in Quantum Gravity

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
In this review we discuss the interplay between discretization, constraint implementation, and diffeomorphism symmetry in Loop Quantum Gravity and Spin Foam models. To this end we review the Consistent Discretizations approach, which is an application of
Benjamin Bahr   +2 more
doaj   +1 more source

Toward Zero‐Excess Alkali Metal Batteries: Bridging Experimental and Computational Insights

open access: yesAdvanced Materials, EarlyView.
This review explores zero‐excess alkali metal batteries, highlighting anode–electrolyte interfaces, metal nucleation, dendrite growth, and SEI formation while comparing Li, Na, and K metals. It critically examines electrolyte and separator roles, emphasizing substrate design, electrolyte modifications, interfacial engineering, and solid‐state ...
Pan He   +6 more
wiley   +1 more source

Emergent Braided Matter of Quantum Geometry

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
We review and present a few new results of the program of emergent matter as braid excitations of quantum geometry that is represented by braided ribbon networks.
Sundance Bilson-Thompson   +3 more
doaj   +1 more source

Active Fabric Origami Enabled by Digital Embroidery of Magnetic Yarns

open access: yesAdvanced Materials, EarlyView.
This study demonstrates a scalable textile manufacturing process that fabricates active origami fabrics (AFO) via digital embroidery of magnetic yarns. The programmable AFO exhibits reversible 2D and 3D transformations under magnetic fields, enabling functionalities such as altering surface roughness and linear actuation.
Haiqiong Li   +3 more
wiley   +1 more source

Equivalent and Alternative Forms for BF Gravity with Immirzi Parameter

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
A detailed analysis of the BF formulation for general relativity given by Capovilla, Montesinos, Prieto, and Rojas is performed. The action principle of this formulation is written in an equivalent form by doing a transformation of the fields of which ...
Merced Montesinos, Mercedes Velázquez
doaj   +1 more source

Spin foam model from canonical quantization

open access: yes, 2007
We suggest a modification of the Barrett-Crane spin foam model of 4-dimensional Lorentzian general relativity motivated by the canonical quantization. The starting point is Lorentz covariant loop quantum gravity. Its kinematical Hilbert space is found as
C. Rovelli   +6 more
core   +3 more sources

Thermally Actuated Soft Robotics

open access: yesAdvanced Materials, EarlyView.
This review focuses on the recent development of thermally actuated soft robotics, highlighting the four major heating mechanisms, as well as structural designs, thermal management, material innovations, and emerging applications. A summary and outlook section present the current challenges of thermally actuated soft robots and the future directions to
Shuang Wu   +2 more
wiley   +1 more source

Triboelectric Nanogenerators Enable Multifunctional Ice Accretion, Melting, and Interfacial Fracture Detection

open access: yesAdvanced Materials, EarlyView.
Water impacting, freezing, melting, and being mechanically removed from the designed dielectric surfaces generates a triboeletric signal that can be used to detect various icing and de‐icing scenarios. The charge transferred directly scales with the interfacial fracture mechanism, further validating triboelectricity as an excellent ice‐detection ...
Kamran Alasvand Zarasvand   +12 more
wiley   +1 more source

Some Considerations on Discrete Quantum Gravity

open access: yes, 2012
Recent results in Local Regge Calculus are confronted with Spin Foam Formalism. Introducing Barrett-Crane Quantization in Local Regge Calculus makes it possible to associate a unique Spin $j_{h}$ with an hinge $h$, fulfilling one of the requirements of ...
Gionti, Gabriele, J, S.
core   +1 more source

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