Results 91 to 100 of about 9,176,618 (297)

A Crystallographic Shear Driven by Oxygen Insertion in (LuFeO3)nLuFe2O4

ChemistryEurope, EarlyView.
Layered structures (LuFeO3)nLuFe2O4 exhibit a common structural transformation upon oxygen uptake. Although the LuFeO3 units do not directly participate in oxygen insertion, these inactive layers nevertheless influence the temperature at which oxygen absorption occurs.
Tianyu Li, Stephanie J. Hong, Sz‐Chian Liou, Emily Foley, Hadas Elazar‐Mittelman, Xiuquan Zhou, H. Cein Mandujano, Efrain E. Rodriguez   +7 more
wiley   +1 more source

Stress distribution and the fragility of supercooled melts

, 2010
We formulate a minimal ansatz for local stress distribution in a solid that includes the possibility of strongly anharmonic short-length motions. We discover a broken-symmetry metastable phase that exhibits an aperiodic, frozen-in stress distribution ...
Abramowitz A., Angell C. A., Bales G. S., Casalini R., Cochran W., Grannan E. R., Hall R., Hall R. W., Johari G. P., Kirkpatrick T. R., Kirkpatrick T. R., Kirkpatrick T. R., Landau L. D., Lindemann F. A., Loidl A., Lookman T., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Lubchenko V., Luttinger J. M., Mandel J., Martinez L.-M., Mehrabadi M. M., Monasson R., Nobre F. D., Novikov V. N., Novikov V. N., Rowlinson J. S., Schmalian J., Singh Y., Sokolov A. P., Stevenson J., Stevenson J. D., Torchinsky D. H., Turnbull D., Usatenko Z. E., Xia X., Yannopoulos N., Yu C. C.   +41 more
core   +1 more source

Aperiodic Order and Singular Spectra

, 2022
This work focuses on several models of aperiodic order and their applications in different areas of mathematics and mathematical physics. After a short introduction to the theory of dynamicals systems, we present random substitutions as a stochastic variant of substitutions which create symbolic dynamical systems that combine long-range order with a ...
openaire   +2 more sources

Nonlinear Active Site Dynamic Behavior Over In Situ Generated Working Zeolites

Chemie Ingenieur Technik, EarlyView.
The methoxymethyl mechanism over α, β, and γ site ensembles and the dynamic site‐interconversion mechanism reduce the induction period of propylene formation. The methoxymethyl mechanism acts on site ensemble α generating surface methoxy species (SMS), which, through the dynamic site‐interconversion mechanism, lead to SMS on site ensembles β and γ that
Toyin Omojola
wiley   +1 more source

Quasicrystals and Other Aperiodic Structures in Mineralogy

Crystals, 2016
In this article, we first present and discuss eighteenth-century descriptions of minerals that contributed decisively to the development of crystallography.
Carlos M. Pina, Victoria López-Acevedo
doaj   +1 more source

Dynamics of Periodic Waves in a Neural Field Model

Mathematics, 2020
Periodic traveling waves are observed in various brain activities, including visual, motor, language, sleep, and so on. There are several neural field models describing periodic waves assuming nonlocal interaction, and possibly, inhibition, time delay or
Nikolai Bessonov, Anne Beuter, Sergei Trofimchuk, Vitaly Volpert   +3 more
doaj   +1 more source

Log-periodic corrections to scaling: exact results for aperiodic Ising quantum chains

, 1996
Log-periodic amplitudes of the surface magnetization are calculated analytically for two Ising quantum chains with aperiodic modulations of the couplings. The oscillating behaviour is linked to the discrete scale invariance of the perturbations.
Abramowitz M, Anifrani J C, Bessis D, Collet P, Coullet P, Coullet P, Dekking M, Derrida B, Dragi Karevski, Dumont J M, Feigenbaum M J, Feigenbaum M J, Harris A B, Iglói F, Jona-Lasinio G, Karevski D, Loïc Turban, Luck J M, Nauenberg M, Niemeijer T, Queffélec M, Saleur H, Sornette D   +22 more
core   +1 more source

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

Optimized Multilayer Structures With Ultrabroadband Near-Perfect Absorption

IEEE Photonics Journal, 2020
We present aperiodic multilayer structures with ultrabroadband near-perfect absorption in the visible and near-infrared wavelength range. We use a hybrid optimization algorithm coupled with the transfer-matrix method, to optimize both the material ...
Chenglong You, Corey T. Matyas, Yin Huang, Jonathan P. Dowling, Georgios Veronis   +4 more
doaj   +1 more source

A Deep Neural Network Based on Two‐Stage Training for Estimating Heart Rate Variability From Camera Videos

Health Care Science, EarlyView.
Heart Rate Variability Estimation from Camera Videos ABSTRACT Background Studies have shown that heart rate variability (HRV) is a predictor of the prognosis of cardiovascular diseases. Contact heartbeat monitoring equipment is widely used, especially in hospitals, and benefits from the rapidity and accuracy of the detection of physiological health ...
Lan Lan, Jin Yin, Haohan Zhang, Hua Jiang, Rui Qin, Xia Zhao, Yu Zhang, Yilong Wang, Jiajun Qiu   +8 more
wiley   +1 more source