Results 81 to 90 of about 148,429 (293)

Superfast front propagation in reactive systems with anomalous diffusion

, 2002
We study a reaction diffusion system where we consider a non-gaussian process instead of a standard diffusion. If the process increments follow a probability distribution with tails approaching to zero faster than a power law, the usual qualitative ...
A Vulpiani, Audoly B., D Vergni, Fischer R. A., Gnedenko B., Klafter J., Kolmogorov A. N., Montroll E., Murray J. D., Okubo A., Paladin G., Peters N., R Mancinelli, Torcini A., Yakhot V.   +14 more
core   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Anomalous diffusion and ergodicity breaking in heterogeneous diffusion processes

New Journal of Physics, 2013
We demonstrate the non-ergodicity of a simple Markovian stochastic process with space-dependent diffusion coefficient D ( x ). For power-law forms D ( x ) ≃ | x | ^α , this process yields anomalous diffusion of the form 〈 x ^2 ( t )〉 ≃  t ^2/(2− ^α ...
Andrey G Cherstvy, Aleksei V Chechkin, Ralf Metzler   +2 more
doaj   +1 more source

Diffusion on random site percolation clusters. Theory and NMR microscopy experiments with model objects

, 2001
Quasi two-dimensional random site percolation model objects were fabricate based on computer generated templates. Samples consisting of two compartments, a reservoir of H$_2$O gel attached to a percolation model object which was initially filled with D ...
A. Kapitulnik, A. Klemm, A. Klemm, A. Klemm, Andreas Klemm, B. M. Fung, D. C. Hong, D. O. Kuethe, E. Barkai, E. Barkai, F. Amblard, F. Amblard, F. Klammler, H.-P. Müller, H.-P. Müller, J. G. Zabolitzky, J. Klafter, J. Klafter, J. Klafter, J.-P. Bouchaud, M. Holz, M. J. Lizak, N. Jan, O. J. Poole, P. Levitz, P. M. Adler, R. Kimmich, R. Kimmich, R. Kimmich, R. Metzler, R. Metzler, R. Metzler, R. Metzler, R. Mills, R. Orbach, R. W. Mair, Rainer Kimmich, Ralf Metzler, S. Alexander, S. Havlin, V. Pasquier, W. Heink, W. R. Schneider   +42 more
core   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Gaussian Processes in Complex Media: New Vistas on Anomalous Diffusion

Frontiers in Physics, 2019
Normal or Brownian diffusion is historically identified by the linear growth in time of the variance and by a Gaussian shape of the displacement distribution.
Francesco Di Tullio, Francesco Di Tullio, Paolo Paradisi, Paolo Paradisi, Renato Spigler, Gianni Pagnini, Gianni Pagnini   +6 more
doaj   +1 more source

Effective numerical treatment of sub-diffusion equation with non-smooth solution

, 2018
In this paper we investigate a sub-diffusion equation for simulating the anomalous diffusion phenomenon in real physical environment. Based on an equivalent transformation of the original sub-diffusion equation followed by the use of a smooth operator ...
Li, Yan, Nie, Yufeng, Wang, Jungang, Yang, Zongze   +3 more
core   +1 more source

Analysis of negative magnetoresistance. Statistics of closed paths. I. Theory [PDF]

, 1999
Statistics of closed paths in two-dimensional (2D) systems, which just determines the interference quantum correction to conductivity and anomalous magnetoconductance, has been studied by computer simulation of a particle motion over the plane with ...
A. V. Germanenko, D. Rainer, G. M. Minkov, H.-P. Wittman, I. V. Gornyi, I. V. Gornyi, K. V. Samokhin, L. P. Gorkov, M. I. Dyakonov, S. A. Negashev, S. Chakravarty, S. Hikami, V. A. Larionova   +12 more
core   +2 more sources

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Turing instability of anomalous reaction–anomalous diffusion systems

European Journal of Applied Mathematics, 2008
Linear stability theory is developed for an activator–inhibitor model where fractional derivative operators of generally different exponents act both on diffusion and reaction terms. It is shown that in the short wave limit the growth rate is a power law of the wave number with decoupled time scales for distinct anomaly exponents of the different ...
Nec, Y., Nepomnyashchy, A. A.
openaire   +1 more source