Results 71 to 80 of about 46,248 (301)
Design and Applications of Multi‐Frequency Programmable Metamaterials for Adaptive Stealth
Advanced Functional Materials, EarlyView.This article provides a comprehensive overview of metamaterials, including their fundamental principles, properties, synthesis techniques, and applications in stealth, as well as their challenges and future prospects. It covers topics that are more advanced than those typically discussed in existing review articles, while still being closely connected ...
Jonathan Tersur Orasugh +4 more
wiley +1 more source
Decorated tensor network renormalization for lattice gauge theories and spin foam models
New Journal of Physics, 2016 Tensor network techniques have proved to be powerful tools that can be employed to explore the large scale dynamics of lattice systems. Nonetheless, the redundancy of degrees of freedom in lattice gauge theories (and related models) poses a challenge for
Bianca Dittrich +2 more
doaj +1 more source
Gravity as BF theory plus potential
, 2009 Spin foam models of quantum gravity are based on Plebanski's formulation of general relativity as a constrained BF theory. We give an alternative formulation of gravity as BF theory plus a certain potential term for the B-field.
Krasnov, Kirill
core +1 more source
Coarse graining methods for spin net and spin foam models [PDF]
New Journal of Physics, 2012 We undertake first steps in making a class of discrete models of quantum gravity, spin foams, accessible to a large scale analysis by numerical and computational methods. In particular, we apply Migdal-Kadanoff and Tensor Network Renormalization schemes to spin net and spin foam models based on finite Abelian groups and introduce `cutoff models' to ...
Dittrich, B. +2 more
openaire +5 more sources
Advanced Healthcare Materials, EarlyView.Biomimetic, suturable, biodegradable fibrous scaffolds are engineered to mimic the tensile properties of LUT tissue using photocrosslinked 5:5% weight per volume elastin‐like peptide and methacrylated gelatin (5E5G). In vitro, urothelium, smooth muscle, and fibroblast 7 day cytocompatibility is demonstrated.
Renea M. Sturm +18 more
wiley +1 more source
Quantum group spin nets: refinement limit and relation to spin foams
, 2014 So far spin foam models are hardly understood beyond a few of their basic building blocks. To make progress on this question, we define analogue spin foam models, so called spin nets, for quantum groups $\text{SU}(2)_k$ and examine their effective ...
Dittrich, Bianca +2 more
core +1 more source
Spin foam models and the Duflo map
Classical and Quantum Gravity, 2019 Abstract We give a general definition of spin foam models, and then of models of 4d quantum gravity based on constraining BF theory. We highlight the construction and quantization ambiguities entering model building, among which the choice of quantization map applied to the B variables carrying metric information after imposing ...
Marco Finocchiaro +3 more
openaire +5 more sources
Advanced Healthcare Materials, EarlyView.Bacterial cellulose has undergone a transformative journey from early applications to its role in advanced regenerative medicine. The review has a pedagogical ambition, offering clear pathways for future research and clinical adoption. Harmonizing regulatory standards and conducting larger, well‐designed clinical trials with standardized endpoints will
Thomas Meslier +3 more
wiley +1 more source
Discrete Gravity Models and Loop Quantum Gravity: a Short Review
Symmetry, Integrability and Geometry: Methods and Applications, 2012 We review the relation between Loop Quantum Gravity on a fixed graph and discrete models of gravity. We compare Regge and twisted geometries, and discuss discrete actions based on twisted geometries and on the discretization of the Plebanski action.
Simone Speziale +2 more
doaj +1 more source
Demonstration of Focusing Wolter Mirrors for Neutron Phase and Magnetic Imaging
Journal of Imaging, 2018 Image-forming focusing mirrors were employed to demonstrate their applicability to two different modalities of neutron imaging, phase imaging with a far-field interferometer, and magnetic-field imaging through the manipulation of the neutron beam ...
Daniel S. Hussey +7 more
doaj +1 more source