Results 91 to 100 of about 45,346 (288)

Pioneering the Future: Principles, Advances, and Challenges in Organic Electrodes for Aqueous Ammonium‐Ion Batteries

Advanced Materials, Volume 37, Issue 13, April 2, 2025.
Leveraging the numerous advantages of ammonium‐ion (NH₄⁺)—including cost‐effectiveness, low corrosiveness, preferential orientation, and rapid diffusion kinetics—aqueous NH₄⁺ batteries (AAIBs) have gained significant attention. This review highlights and evaluates the progress of AAIBs utilizing organic electrode materials such as small molecules ...
Mangmang Shi, Xiaoyan Zhang
wiley   +1 more source

Discretisations, Constraints and Diffeomorphisms in Quantum Gravity

Symmetry, 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, Rodolfo Gambini, Jorge Pullin   +2 more
doaj   +1 more source

Inorganic Dielectric Materials Coupling Micro‐/Nanoarchitectures for State‐of‐the‐Art Biomechanical‐to‐Electrical Energy Conversion Devices

Advanced Materials, EarlyView.
Biomechanical‐to‐electrical energy conversion devices are uniquely suited for self‐driven physiological information monitoring and powering human–computer interaction systems. These devices based on micro‐/nanoarchitectured inorganic dielectric materials (MNIDMs) have shown ultrahigh electromechanical performance and thus great potential for practical ...
Jia‐Han Zhang, Zhengtong Li, Zeng Liu, Mingxuan Li, Jiaxin Guo, Jinhua Du, Changkun Cai, Shaohui Zhang, Ningning Sun, Yong Li, Xingtao Xu, Xihong Hao, Yusuke Yamauchi   +12 more
wiley   +1 more source

Emergent Braided Matter of Quantum Geometry

Symmetry, 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, Jonathan Hackett, Louis Kauffman, Yidun Wan   +3 more
doaj   +1 more source

On knottings in the physical Hilbert space of LQG as given by the EPRL model

, 2010
We consider the EPRL spin foam amplitude for arbitrary embedded two-complexes. Choosing a definition of the face- and edge amplitudes which lead to spin foam amplitudes invariant under trivial subdivisions, we investigate invariance properties of the ...
Barrett J, Barrett J, Benjamin Bahr, Bianchi E Regoli D Rovelli C, Bojowald M Perez A, Edmonds A R, Freidel L, Freidel L Livine E, Freidel L Speziale S, Kaminski W, Kaminski W, Livine E, Noui K, Perez A, Rovelli C, Rovelli C, Rovelli C, Sahlmann H   +17 more
core   +1 more source

Hidden Quantum Gravity in 4d Feynman diagrams: Emergence of spin foams [PDF]

, 2006
We show how Feynman amplitudes of standard QFT on flat and homogeneous space can naturally be recast as the evaluation of observables for a specific spin foam model, which provides dynamics for the background geometry.
Aristide Baratin, Ashtekar A, Baez J C, Baez John C Baratin A Freidel L, Baratin A, Barrett J W, Barrett John W Mackaay M, Batalin I A, Bern Z, Bianchi E, Crane L Sheppeard M D, Freidel L, Freidel L, Freidel L, Freidel L Kowalski-Glikman J Starodubtsev A, Freidel L Noui K Roche P, Freidel L Starodubtsev A, Giesel K Thiemann T, Giesel K Thiemann T, Giesel K Thiemann T, Laurent Freidel, Livine Etera R, Oriti D, Perez A, Polyakov A M, Regge T, Schmidt M G Schubert C, Weinberg S   +27 more
core   +2 more sources

Materials Advances in Devices for Heart Disease Interventions

Advanced Materials, EarlyView.
This review examines the crucial role of materials in heart disease interventions, focusing on strategies for monitoring, managing, and repairing heart conditions. It discusses the material requirements for medical devices, highlighting recent innovations and their impact on cardiovascular health.
Gagan K. Jalandhra, Lauryn Srethbhakdi, James Davies, Chi Cong Nguyen, Phuoc Thien Phan, Zachary Och, Aditya Ashok, Khoon S. Lim, Hoang‐Phuong Phan, Thanh Nho Do, Nigel H. Lovell, Jelena Rnjak‐Kovacina   +11 more
wiley   +1 more source

Equivalent and Alternative Forms for BF Gravity with Immirzi Parameter

Symmetry, 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

Holonomy Spin Foam Models: Definition and Coarse Graining

, 2012
We propose a new holonomy formulation for spin foams, which naturally extends the theory space of lattice gauge theories. This allows current spin foam models to be defined on arbitrary two-complexes as well as to generalize current spin foam models to ...
Bahr, Benjamin, Dittrich, Bianca, Hellmann, Frank, Kaminski, Wojciech   +3 more
core   +1 more source

Electrospinning and Nanofiber Technology: Fundamentals, Innovations, and Applications

Advanced Materials, EarlyView.
This review explores electrospinning fundamentals, methods for synthesizing polymer, metal oxide, carbon, and composite nanofibers, and advancements in fiber architectures like porous, core–shell, and aligned structures. It highlights applications in functional membranes, sensors, energy systems, and catalyst design while addressing future ...
Yujang Cho, Jong Won Beak, Mingyu Sagong, Seongcheol Ahn, Jong Seok Nam, Il‐Doo Kim   +5 more
wiley   +1 more source