Results 81 to 90 of about 10,141,921 (243)

A Markov approach to credit rating migration conditional on economic states

Canadian Journal of Statistics, EarlyView.
Abstract We develop a model for credit rating migration that accounts for the impact of economic state fluctuations on default probabilities. The joint process for the economic state and the rating is modelled as a time‐homogeneous Markov chain. While the rating process itself possesses the Markov property only under restrictive conditions, methods ...
Michael Kalkbrener, Natalie Packham
wiley   +1 more source

Homogeneous holographic viscoelastic models and quasicrystals

Physical Review Research, 2020
We show that the field theories dual to the homogeneous holographic models with spontaneously broken translations display several distinctive properties of quasicrystals, aperiodic crystals with long-range order (e.g., incommensurate charge density waves)
Matteo Baggioli
doaj   +1 more source

Molten Zinc Coordination Polymer Glass as a Host for Stable and Processable Optical Dye Composites

EcoEnergy, EarlyView.
Zinc‐based coordination polymer glass is employed to suppress aggregation‐caused quenching (ACQ) and enhance molecular stability, enabling improved luminescence performance in the solid state. The emission color of the hybrid composites can be tuned by varying the incorporated guest molecules, while the glass matrix effectively prevents aggregation and
Jaeho Lee, Wengang Huang, Yoshiki Sugai, Xiangyi Zha, Yuelei Chen, Joshua A. Powell, Yi‐Chen Hsu, Zixi Xie, Vicki Chen, Lianzhou Wang, Jingwei Hou   +10 more
wiley   +1 more source

Rhythms in longitudinal thalamic recordings are linked to seizure risk

Epilepsia, EarlyView.
Abstract Objective Seizure unpredictability remains a major clinical challenge for people with epilepsy. Previous works have shown that seizure risk is associated with circadian and multi‐day cycles in both brain and physiological signals. However, it remains unclear whether neural activity from deep brain structures such as the anterior nucleus of the
Xinbing Zhang, Zachary T. Sanger, Thomas Lisko, Steffen Ventz, Robert A. McGovern, Theoden I. Netoff   +5 more
wiley   +1 more source

Aperiodic Linear Networked Control Considering Variable Channel Delays: Application to Robots Coordination

Sensors, 2015
One of the main challenges in wireless cyber-physical systems is to reduce the load of the communication channel while preserving the control performance.
Carlos Santos, Felipe Espinosa, Enrique Santiso, Manuel Mazo   +3 more
doaj   +1 more source

Reduced occurrence of alpha waves during resting state predicts high attention‐deficit/hyperactivity disorder traits in young adults

JCPP Advances, EarlyView.
Abstract Background Attention‐deficit/hyperactivity disorder (ADHD) is a neurodevelopmental condition with significant cognitive and social impacts. Identifying reliable biomarkers for ADHD is crucial for developing personalised therapies. Electroencephalography (EEG) alpha oscillations (8–12 Hz) have been suggested as a potential biomarker, but ...
Julio Rodriguez‐Larios, Ümit Aydin, Gráinne McLoughlin   +2 more
wiley   +1 more source

Exploring aperiodic order in photonic time crystals

Physical Review Applied
We present a theoretical framework for analyzing aperiodically ordered photonic time quasicrystals (PTQCs), which are the temporal analogs of spatial photonic quasicrystals. Using a general two-symbol substitutional sequence to model temporal modulations, we extend the trace and anti-trace map formalism used for spatial photonic quasicrystals to the ...
Marino Coppolaro, Massimo Moccia, Giuseppe Castaldi, Vincenzo Galdi   +3 more
openaire   +2 more sources

Observation of Linear and Nonlinear Light Trapping on Topological Dislocations

Laser &Photonics Reviews, EarlyView.
Topological dislocations are global lattice defects found in various systems ranging from crystals to photonic lattices. This work reports the first observation at optical frequencies of linear modes with tunable localization bound to edge dislocations and their nonlinear counterparts ‐ dislocation solitons. These results reveal an intriguing interplay
S. K. Ivanov, A. V. Kireev, K. Sabour, N. S. Kostyuchenko, S. A. Zhuravitskii, N. N. Skryabin, I. V. Dyakonov, A. A. Kalinkin, V. O. Kompanets, S. P. Kulik, S. V. Chekalin, A. Ferrando, V. N. Zadkov, Y. V. Kartashov   +13 more
wiley   +1 more source

THE PROCESS OF GETTING STABLE SELF-EXCITED OSCILLATIONS IN SYSTEM OF LOW-VOLTAGE CIRCUITS OF REGULATION WITH ELECTRIC POTENTIAL OF LOCOMOTIVE VL8

Nauka ta progres transportu, 2011
The possibility of construction of a steady natural vibration system by introduction of successive correction link as an aperiodic link of the first-order is considered.
D. S. Bilukhin
doaj  

INVERSE CORRECTION OF FOURIER TRANSFORMS FOR ONE-DIMENSIONAL STRONGLY SCATTERING APERIODIC LATTICES

Journal of Fundamental and Applied Sciences, 2016
The accuracy of the Fourier transform (FT), advantageous for the aperiodic lattice (AL) design, is significantly improved for strongly scattering periodic lattices (PLs) and ALs.
Y. F. Hsin
doaj   +1 more source