Results 131 to 140 of about 818,954 (398)

A New Spin Foam Model for 4d Gravity

, 2008
Starting from Plebanski formulation of gravity as a constrained BF theory we propose a new spin foam model for 4d Riemannian quantum gravity that generalises the well-known Barrett-Crane model and resolves the inherent to it ultra-locality problem.
Alexandrov S, Ashtekar A, Baez J C, Baez J C, Baratin A, Barrett J W, Barrett J W, Buffenoir E, Capovilla R, De Pietri R, Engle J Livine E Pereira R Rovelli C, Engle J Pereira R Rovelli C, Freidel L, Freidel L, Freidel L, Gelfand I M, Kirill Krasnov, Laurent Freidel, Livine E R Speziale S, Perelomov A, Ponzano G, Reisenberger M P, Reisenberger M P   +22 more
core   +1 more source

Tailoring the Properties of Functional Materials With N‐Oxides

Advanced Functional Materials, EarlyView.
The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich, Michelle Kobus, Shirin Mesgarha, Erica Moretto, Laurens Grosche, Wolfgang Maison   +5 more
wiley   +1 more source

Corrigendum: Hyperspectral Measurements, Parameterizations, and Atmospheric Correction of Whitecaps and Foam From Visible to Shortwave Infrared for Ocean Color Remote Sensing

Frontiers in Earth Science, 2021
Heidi M. Dierssen
doaj   +1 more source

Chemical Foaming of Carbon Fiber-Polylactic Acid (CF-PLA) Porous Structures and Their Feasibility as EMI Shields in the X-Band

IEEE Access
The massive increase in telecommunications infrastructure and devices has recently exacerbated the necessity of developing advanced electromagnetic interference (EMI) shielding solutions.
Valeria Marrocco, Rossella Surace, Giovanna Calo, Elisabetta Brandonisio, Ilaria Marasco, Francesca Filograno, Irene Fassi   +6 more
doaj   +1 more source

Metallized polymeric foam material [PDF]

, 1974
Open-celled polyurethane foams can be coated uniformly with thin film of metal by vapor deposition of aluminum or by sensitization of foam followed by electroless deposition of nickel or copper.
Bilow, N., Birnbaum, B. A.
core   +1 more source

Designing Thermally Compatible Template‐Coating Pairs Toward Dimensionally Stable 3D Porous Carbons with Tunable Density

Advanced Functional Materials, EarlyView.
3D porous carbons with tunable density are crucial for energy storage, separations, and load‐bearing applications; however, their fabrication is often constrained by shrinkage during pyrolysis. This study optimizes and demonstrates the versatility of a template–coating pair strategy, producing materials that largely retain their shape and hierarchical ...
Adarsh Suresh, Manuela Campos, Kendrick Xie, Elektra Makris, Jonah Lovejoy, Maya El Shamsy, Chong Liu, Stuart J Rowan   +7 more
wiley   +1 more source

Hidden Quantum Gravity in 3d Feynman diagrams

, 2006
In this work we show that 3d Feynman amplitudes of standard QFT in flat and homogeneous space can be naturally expressed as expectation values of a specific topological spin foam model.
Aristide Baratin, Baez J C, Baratin A, Barrett J W, Barrett J W Garcia-Islas J M Martins J F, Freidel L, Freidel L, Freidel L, Freidel L, Freidel L Livine E R, Freidel L Livine E R, Freidel L Louapre D, Freidel L Majid S, Freidel L Starodubtsev A, Laurent Freidel, Noui K, Oriti D, Perez A, Polyakov A M, Ponzano G, Regge T, Singer I M, Taylor Y U Woodward C T   +22 more
core   +1 more source

A Termite‐Inspired Alternative to Cement

Advanced Functional Materials, EarlyView.
A termite‐inspired composite of clay, cellulose, and lignin forms a dense fibrous network with concrete‐like strength (32 MPa) and superior elasticity, processed at ambient temperature. Abstract Clay combined with organic materials is used by termites as a strong and durable construction material for their mounds with minimal environmental impact. Here,
Oren Regev, Peter Fratzl, Emeline Raguin, Markus Antonietti   +3 more
wiley   +1 more source

THE AN ELABORATE ASSORTMENT OF BISCUIT SEMI-FINISHED PRODUCTS WITH A HIGH CONTENT OF DIETARY FIBER

Современная наука и инновации, 2022
In the article devotes to the possibility of production of biscuit semi-finished products by using Jerusalem artichoke flour and fiber wheat that will enrich the biscuits dietary fiber, to improve performance and optimize the technological process.
Julia Evgenievna Dmitrieva, Larisa Georgievna Ermosh   +1 more
doaj  

Influence of the plantar cutaneous information in postural regulation depending on the age and the physical activity status

Frontiers in Human Neuroscience, 2016
The aim was to compare the balance control adaptation to different supporting surfaces depending on the age and the physical activity status. The balance control of two groups of young (n=17) and old (n=17) participants who practised regular physical ...
Julien Maitre, Thierry Pascal Paillard
doaj   +1 more source