Results 101 to 110 of about 67,595 (279)

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

Advanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert, Johannes Krug, Gudrun Lotze, Imke A.K. Fiedler, Diana Freund, Ezgi Deniz Türkoğlu, Christine Plumeyer, Felix N. von Brackel, Anton Davydok, Manfred Burghammer, Thomas Beikler, Thomas F. Keller, Katrin Bekes, Elizabeth A. Zimmermann, Björn Busse   +14 more
wiley   +1 more source

Exterior integrability: Yang–Baxter form of non-equilibrium steady-state density operator

New Journal of Physics, 2013
A new type of quantum transfer matrix, arising as a Cholesky factor for the steady-state density matrix of a dissipative Markovian process associated with the boundary-driven Lindblad equation for the isotropic spin-1/2 Heisenberg ( XXX ) chain, is ...
Tomaž Prosen, Enej Ilievski, Vladislav Popkov   +2 more
doaj   +1 more source

Dissipative operators on Banach spaces

Journal of Functional Analysis, 2007
A bounded linear operator \(T\) on a Banach space \(X\) is said to be dissipative if \(\| \exp(tT)\| \leq 1\) for all \(t \geq 0\), and is said to be Hermitian if \(\| \exp(itT)\| = 1\) for all \(t \in \mathbb R\). For a dissipative operator, it is proved that \[ \lim_{t \to \infty}\| \exp(tT)T\| = \sup\{| \lambda| : \lambda\in\sigma(T)\cap i\mathbb R \
openaire   +3 more sources

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures

Advanced Functional Materials, EarlyView.
This study demonstrates that femtosecond laser‐induced periodic surface structures (fs‐LIPSS) can function as phononic metasurfaces, reducing thermal conductivity below the plain thin‐film limit. Phonon Monte Carlo analysis reveals that the periodic structures restrict phonon mean free paths.
Hiroki Hamma, Roman Anufriev, Kazuyoshi Fushinobu, Masahiro Nomura, Byunggi Kim   +4 more
wiley   +1 more source

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

Well-posedness and exponential stability for a wave equation with nonlocal time-delay condition

Electronic Journal of Differential Equations, 2017
Well-posedness and exponential stability of nonlocal time-delayed of a wave equation with a integral conditions of the 1st kind forms the center of this work.
Carlos Alberto Raposo, Huy Hoang Nguyen, Joilson Oliveira Ribeiro, Vanessa Barros de Oliveira   +3 more
doaj  

On Dissipative Quadratic Stochastic Operators

, 2007
In present paper we introduce the notion of dissipative quadratic stochastic operator and cubic stochastic operator. We prove necessary conditions for dissipativity of quadratic stochastic operators. Besides, it is studied certain limit behavior of such operators. Finally we prove ergodic theorem for dissipative operators.
openaire   +2 more sources

Dissipative Boundary Conditions for Ordinary Differential Operators

Mathematical Notes, 2005
In this paper two theorems which describe dissipative boundary conditions for ordinary differential operators on a closed interval are proved. We also show that all these boundary conditions are Birkhoff regular in even case. In odd case this is not true and we bring an example which demonstrates it.
openaire   +2 more sources

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

Advanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan, Joe Sunny, Tamer Karaman, Reshma Peremadathil‐Pradeep, Emily Darwin, Felix Büttner, Dieter Suess, Hans Josef Hug, Manfred Albrecht   +8 more
wiley   +1 more source