Results 61 to 70 of about 9,176,618 (297)

What is Aperiodic Order?

open access: yes, 2002
27 pages, many colour ...
Baake, Michael   +2 more
openaire   +2 more sources

High-Impedance Surfaces with Aperiodically-Ordered Textures [PDF]

open access: yes2007 International Conference on Electromagnetics in Advanced Applications, 2007
This paper deals with a study of textured (mushroom-type) high-impedance substrates based on aperiodic-tiling geometries. In this connection, preliminary results from full-wave simulations are presented in order to explore possible applications as artificial-magnetic-conductor ground-planes for low-profile directive antennas.
Gallina, Ilaria   +6 more
openaire   +3 more sources

Néel Tensor Torque in Polycrystalline Antiferromagnets

open access: yesAdvanced Materials, EarlyView.
This work introduces a Néel tensor torque based on a rank‐two symmetric tensor capturing spin correlations in a polycrystalline antiferromagnet. It shows the Néel tensor can be shaped and reshaped through the spin‐orbit torque (SOT) technique, enabling field‐free SOT switching with a specific polarity of the adjacent ferromagnet. This discovery opens a
Chao‐Yao Yang   +4 more
wiley   +1 more source

Crystal nucleation of colloidal hard dumbbells

open access: yes, 2010
Using computer simulations we investigate the homogeneous crystal nucleation in suspensions of colloidal hard dumbbells. The free energy barriers are determined by Monte Carlo simulations using the umbrella sampling technique. We calculate the nucleation
Dijkstra, Marjolein, Ni, Ran
core   +2 more sources

Improved Disorder Resilience in Small‐Footprint Photonic Cavities with Periodicity Breaking

open access: yesAdvanced Optical Materials, EarlyView.
Compact photonic crystal cavities with engineered aperiodicity are demonstrated to sustain high quality factormodes and enhanced reproducibility within a minimal footprint. Combining numerical optimization and near‐field measurements, the study reveals how controlled periodicity breaking improves disorder resilience, offering a robust and scalable ...
Nicoletta Granchi   +7 more
wiley   +1 more source

Logics with rigidly guarded data tests [PDF]

open access: yesLogical Methods in Computer Science, 2015
The notion of orbit finite data monoid was recently introduced by Bojanczyk as an algebraic object for defining recognizable languages of data words.
Gabriele Puppis   +2 more
doaj   +1 more source

The descriptive complexity approach to LOGCFL

open access: yes, 1998
Building upon the known generalized-quantifier-based first-order characterization of LOGCFL, we lay the groundwork for a deeper investigation. Specifically, we examine subclasses of LOGCFL arising from varying the arity and nesting of groupoidal ...
Lautemann, Clemens   +3 more
core   +4 more sources

Exciton Optical Absorption in Self-Similar Aperiodic Lattices [PDF]

open access: yes, 1994
Exciton optical absorption in self-similar aperiodic one-dimensional systems is considered, focusing our attention on Thue-Morse and Fibonacci lattices as canonical examples.
C. L. Roy   +24 more
core   +3 more sources

Reliable AI Platform for Monitoring BCI Caused Brain Injury and Providing Real‐Time Protection

open access: yesAdvanced Science, EarlyView.
BrainGuard enables real‐time and interpretable assessment of brain injury caused by brain computer interface (BCI). Using feature‐based Gaussian process (GP) emulators trained on limited biomechanical data, it efficiently predicts full‐field strain and constructs patient‐specific digital brain twins to support clinical diagnosis and long‐term BCI ...
Chufan He   +3 more
wiley   +1 more source

Local symmetries and perfect transmission in aperiodic photonic multilayers [PDF]

open access: yes, 2013
We develop a classification of perfectly transmitting resonances occuring in effectively one-dimensional optical media which are decomposable into locally reflection symmetric parts.
Diakonos, F. K.   +4 more
core   +2 more sources

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