Results 101 to 110 of about 47,494 (299)

Ponzano-Regge model revisited III: Feynman diagrams and Effective field theory

, 2005
We study the no gravity limit G_{N}-> 0 of the Ponzano-Regge amplitudes with massive particles and show that we recover in this limit Feynman graph amplitudes (with Hadamard propagator) expressed as an abelian spin foam model.
Akhmedov E T, Barrett J W, Barrett J W, Barrett J W Garcia-Islas J M Martins J F, Davids S, Etera R Livine, Freidel L, Freidel L, Freidel L, Freidel L, Freidel L Louapre D, Freidel L Noui K Roche P, Freidel L Starodubtsev A, Kosinski P Maslanka P Lukierski J Sitarz A, Kowalski-Glikman J, Laurent Freidel, Madore J, Majid S, Meusburger C, Noui K, Oriti D, Perez A, Ponzano G, Reisenberger M P, Rovelli C, Smolin L, Weinberg S   +26 more
core   +2 more sources

Co‐Electrospinning Extracellular Matrix with Polycaprolactone Enables a Modular Approach to Balance Bioactivity and Mechanics of a Multifunctional Bone Wrap

Advanced Healthcare Materials, EarlyView.
The incorporation of nondigested ECM and synthetic polymers into a co‐electrospinning system enables the decoupling of bioactivity and mechanical properties within a single wrap. This technique is used to develop a multifunctional bone wrap that achieves augmented membrane durability, sustained infection control, and enhanced vascularity for use in ...
Sarah Jones, Madeline Laude, Zeenat Oyebanji, Ruchi Birur, Andres Luengo Martinez, Isabelle Gilbert, Phillip Baek, Nichole Longbottom, Nicole McCullough, Staci J. Horn, Chien‐Yu Lin, Matthew J. Lohr, Fred Clubb, Manuel K. Rausch, Elizabeth Cosgriff‐Hernandez   +14 more
wiley   +1 more source

Quantum Gravity as a Broken Symmetry Phase of a BF Theory

Symmetry, Integrability and Geometry: Methods and Applications, 2006
We explain how General Relativity with a cosmological constant arises as a broken symmetry phase of a BF theory. In particular we show how to treat de Sitter and anti-de Sitter cases simultaneously.
Aleksandar Miković
doaj  

On background-independent renormalization of spin foam models [PDF]

Classical and Quantum Gravity, 2016
23 pages, 12 figures, updated ...
openaire   +3 more sources

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

Extracellular‐Matrix‐Based Materials from Decellularized Tissue: Opportunities, Challenges, and Future Directions in Regenerative Medicine

Advanced Healthcare Materials, EarlyView.
Extracellular matrix‐based materials derived from decellularized tissue (dECM) harness the tissue's native bioactivity to guide repair and regeneration across diverse clinical applications. This perspective highlights clinical uses of dECM biomaterials and advances in fabrication methods such as electrospinning and 3D printing.
Madeline Laude, Vasiliki Kolliopoulos, Antonios G. Mikos, Lisa J. White, Elizabeth Cosgriff‐Hernandez   +4 more
wiley   +1 more source

Local gauge theory and coarse graining

, 2012
Within the discrete gauge theory which is the basis of spin foam models, the problem of macroscopically faithful coarse graining is studied. Macroscopic data is identified; it contains the holonomy evaluation along a discrete set of loops and the ...
José A Zapata, Kobayashi S, Oriti D
core   +1 more source

Hydrocolloid‐Based Multiwavelength Stretchable QD‐OLED Patch for Simultaneous Neonatal Jaundice and Dermatitis Treatment with Biosignal Monitoring

Advanced Healthcare Materials, EarlyView.
Comparison of therapeutic and diagnostic applications of a surface‐emitting light source with multiwavelength emission characteristics. Abstract Conventional light‐emitting‐diode‐based light sources suffer from rigidity, localized heating, and poor adaptability to skin deformation, limiting their use in skin‐attached medical devices.
In Ho Kim, Young Woo Kim, Jae‐Young Jeong, Ye Ji Shin, Chaeyeong Lee, Jae Gyun Choi, Oh Kwan Kwon, Kyoung Hwa Kim, Sang Jik Kwon, Eou‐Sik Cho, Yongmin Jeon   +10 more
wiley   +1 more source

Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction

Carbon Energy
Transition‐metal oxyhydroxides are attractive catalysts for oxygen evolution reactions (OERs). Further studies for developing transition‐metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the ...
Zhichao Jia, Yang Yuan, Yanxing Zhang, Xiang Lyu, Chenhong Liu, Xiaoli Yang, Zhengyu Bai, Haijiang Wang, Lin Yang   +8 more
doaj   +1 more source

Geometric spin foams, Yang-Mills theory and background-independent models

, 2005
We review the dual transformation from pure lattice gauge theory to spin foam models with an emphasis on a geometric viewpoint. This allows us to give a simple dual formulation of SU(N) Yang-Mills theory, where spin foam surfaces are weighted with the ...
Conrady, Florian
core   +2 more sources