Results 121 to 130 of about 45,346 (288)

Gluing 4-simplices: A derivation of the Barrett-Crane spin foam model for Euclidean quantum gravity [PDF]

, 2000
Daniele Oriti, Ruth M. Williams
openalex   +1 more source

Artificially Weaved Textile‐like Surface Micromachined Graphene‐Polymer Flexible Bioelectrodes

Advanced Materials Technologies, EarlyView.
This study reports on the engineering of microscale textured surfaces of SU‐8/PMMA polymer composites much like a “weft‐warp” pattern to resemble “artificially‐weaved” textiles. These microstructured surfaces enable conformal layering of functional reduced graphene oxide (rGO), all‐in‐all offering favorable features including remarkable self ...
Seba Nur Alhasan, S. Sajjad Mirbakht, Saygun Guler, Osman Sahin, Muhammad Umar, Burcu Arman Kuzubasoglu, Murat Kaya Yapici   +6 more
wiley   +1 more source

One‐Pot Hydrothermal Synthesis of Vanadium Oxide‐Decorated Carbon Nanotube Hybrid Composite Electrodes for Superior Supercapacitor Applications

Advanced Materials Technologies, EarlyView.
Graphical representation of the one‐pot hydrothermal synthesis of V2O5‐CNT hybrid composite electrode, illustrating its morphological characteristics and electrochemical performance. Abstract We demonstrate the one‐pot hydrothermal synthesis of vanadium oxide (V₂O₅)‐multi‐walled carbon nanotube (CNT) hybrid composites for advanced energy storage ...
Rahul S. Ingole, Kwangjun Kim, Minwook Kim, Yong Tae Kim, Snehal L. Kadam, Jae Young Seok, Jong G. Ok   +6 more
wiley   +1 more source

From Local Regge Calculus towards Spin Foam Formalism?

, 2006
We introduce the basic elements of SO(n)-local theory of Regge Calculus. A first order formalism, in the sense of Palatini, is defined on the metric-dual Voronoi complex of a simplicial complex.
J, Gabriele Gionti S.
core   +1 more source

Spin foam model for Lorentzian general relativity [PDF]

, 2001
Alejandro Pérez, Carlo Rovelli
openalex   +1 more source

Spin foam model from canonical quantization

, 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, G. Ponzano, J. C. Baez, L. Freidel, L. Freidel, M. Gaul, Sergei Alexandrov   +6 more
core   +3 more sources

RENORMALIZATION FOR SPIN FOAM MODELS OF QUANTUM GRAVITY [PDF]

The Tenth Marcel Grossmann Meeting, 2006
5 pages, talk given at the 10th Marcel Grossmann meeting, Rio de Janeiro, July ...
openaire   +4 more sources

Electrochemical‐Doping of Tungsten on Nickel‐Boron‐Phosphide Microspheres for Accelerated Industrial‐Scale Water Electrolysis at High Current Density

Advanced Materials Technologies, EarlyView.
The bifunctional W/NiBP (+) || W/NiBP (−) demonstrates superior overall water splitting (OWS) performance as compared to the benchmark of Pt/C (+) || RuO2 (−). Notably, the W/NiBP (+, −) exhibits an ultra‐low cell voltage of 2.68 V at 2000 mA cm−2 high current density as compared to the benchmark value of 3.29 V.
Md Ahasan Habib, Sumiya Akter Dristy, Shusen Lin, Mehedi Hasan Joni, Md Najibullah, Rutuja Mandavkar, Jihoon Lee   +6 more
wiley   +1 more source

(3+1)-dimensional spin foam model of quantum gravity with spacelike and timelike components [PDF]

, 2001
Alejandro Pérez, Carlo Rovelli
openalex   +1 more source

N=2 supersymmetric spin foams in three dimensions

, 2007
We construct the spin foam model for N=2 supergravity in three dimensions. Classically, it is a BF theory with gauge algebra osp(2|2). This algebra has representations which are not completely reducible.
Bianchi E, Etera R Livine, Freidel L, Freidel L, Freidel L, Freidel L Louapre D, Girelli F, James P Ryan, Livine E R, Livine E R Ryan J P, Ponzano G, Speziale S   +11 more
core   +2 more sources