Results 51 to 60 of about 58,184 (331)

A finite-temperature liquid-quasicrystal transition in a lattice model

, 2010
We consider a tiling model of the two-dimensional square-lattice, where each site is tiled with one of the sixteen Wang tiles. The ground states of this model are all quasi-periodic.
B. Grünbaum, C. Janot, E. Eisenberg, J. B. Suck, Z. Rotman   +4 more
core   +1 more source

An Algebraic Invariant for Substitution Tiling Systems

Geometriae Dedicata, 1998
We consider tilings of Euclidean spaces by polygons or polyhedra, in particular, tilings made by a substitution process, such as the Penrose tilings of the plane. We define an isomorphism invariant related to a subgroup of rotations and compute it for various examples. We also extend our analysis to more general dynamical systems.
Radin, Charles, Sadun, Lorenzo
openaire   +3 more sources

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source

Tilings, tiling spaces and topology

, 2018
To understand an aperiodic tiling (or a quasicrystal modeled on an aperiodic tiling), we construct a space of similar tilings, on which the group of translations acts naturally. This space is then an (abstract) dynamical system.
Anderson JE, Baake M, Bellissard J, Bellissard J, Benedetti R, Buczek P, Dworkin S, Forrest A, Gouere J-B, Hof A, L. Sadun, Lee J-Y, Ormes N, Priebe NM, Sadun L, Sadun L   +15 more
core   +1 more source

On the Behavior of Tile Assembly System at High Temperatures [PDF]

Computability, 2012
Behavior of Winfree's tile assembly system (TAS) at high temperatures is investigated in combination with integer programming of a specific form called threshold programming. First, we propose a way to build bridges from the Boolean satisfiability problem (SAT) to threshold programming, and further to TAS's behavior, in order to prove the NP-hardness ...
Shinnosuke Seki 0001, Yasushi Okuno
openaire   +2 more sources

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Dual-band topological Bott insulators in Ammann–Beenker-tiling square photonic quasicrystals

JPhys Photonics
In this work, we study topological states in Ammann–Beenker-tiling photonic quasicrystals made of magneto-optical materials. While conventional topological states in photonic systems with crystalline symmetry are characterized by topological invariants ...
Yingfang Zhang, Zhihao Lan, Weicheng Chen, Jianqing Li   +3 more
doaj   +1 more source

Structural transitions in vortex systems with anisotropic interactions

New Journal of Physics, 2018
We introduce a model of vortices in type-II superconductors with a four-fold anisotropy in the vortex–vortex interaction potential. Using numerical simulations we show that the vortex lattice undergoes structural transitions as the anisotropy is ...
M W Olszewski, M R Eskildsen, C Reichhardt, C J O Reichhardt   +3 more
doaj   +1 more source

The dawning era of comprehensive transcriptome analysis in cellular microbiology

Frontiers in Cellular and Infection Microbiology, 2010
Bacteria rapidly change their transcriptional patterns during infection in order to adapt to the host environment. To investigate host-bacteria interactions, various strategies including the use of animal infection models, in vitro assay systems and ...
Chihiro eAikawa, Chihiro eAikawa, Fumito eMaruyama, Ichiro eNakagawa   +3 more
doaj   +1 more source

All‐in‐One Analog AI Hardware: On‐Chip Training and Inference with Conductive‐Metal‐Oxide/HfOx ReRAM Devices

Advanced Functional Materials, EarlyView.
An all‐in‐one analog AI accelerator is presented, enabling on‐chip training, weight retention, and long‐term inference acceleration. It leverages a BEOL‐integrated CMO/HfOx ReRAM array with low‐voltage operation (<1.5 V), multi‐bit capability over 32 states, low programming noise (10 nS), and near‐ideal weight transfer.
Donato Francesco Falcone, Victoria Clerico, Wooseok Choi, Tommaso Stecconi, Folkert Horst, Laura Bégon‐Lours, Matteo Galetta, Antonio La Porta, Nikhil Garg, Fabien Alibart, Bert Jan Offrein, Valeria Bragaglia   +11 more
wiley   +1 more source