Results 61 to 70 of about 13,259 (186)

Scaling collapse and structure functions: identifying self-affinity in finite length time series [PDF]

open access: yes, 2005
Empirical determination of the scaling properties and exponents of time series presents a formidable challenge in testing, and developing, a theoretical understanding of turbulence and other out-of-equilibrium phenomena.
Chapman, Sandra C.   +3 more
core   +5 more sources

Guest Editorial: Unfolding the potential of 5G technologies for future wireless networks

open access: yesIET Networks, EarlyView.
Abstract With the rapid advancements in mobile Internet and smartphones, data traffic in current mobile communication systems is growing exponentially. At the same time, demands for lower latency, increased robustness, and higher energy efficiency are becoming more stringent.
Gwanggil Jeon   +3 more
wiley   +1 more source

Why Should we Worry about Nigeria's Fragile Security?

open access: yesThe Political Quarterly, EarlyView.
Abstract This paper explores the multifaceted implications of Nigeria's persistent security crisis, highlighting its domestic, regional and global consequences. It examines the humanitarian toll, economic disruption, poverty, food insecurity and the erosion of social cohesion within Nigeria. Regionally, it analyses how Nigeria's instability exacerbates
Onyedikachi Madueke
wiley   +1 more source

Experimental modeling of PEM fuel cells using a new improved seagull optimization algorithm

open access: yesEnergy Reports, 2019
This study proposes an optimal model to design and simulate the proton exchange membrane fuel cell (PEMFC) systems. The purpose of this paper is to present an improved version of seagull optimization algorithm for optimal parameter identification of the ...
Yan Cao   +4 more
doaj   +1 more source

Lévy flight of superdiffusive light in coupled waveguide lattices

open access: yesPhysical Review Research, 2020
Exotic light behavior in certain disordered one-dimensional optical waveguide lattices with selectively doped gain/loss operating away from the PT symmetry regime is reported.
Sayan Bhattacherjee   +2 more
doaj   +1 more source

Levy Flight of Photoexcited Minority Carriers in Moderately Doped Semiconductors: Theory and Observation

open access: yes, 2012
Spatial spread of minority carriers produced by optical excitation in semiconductors is usually well described by a diffusion equation. The classical diffusion process can be viewed as a result of a random walk of particles in which every step has the ...
Foss   +19 more
core   +1 more source

BaYaka forager and Bantu fisher‐farmer adolescent engagement with intensifying market integration in the Republic of the Congo Participation des adolescents BaYaka chasseurs‐cueilleurs et Bantous pêcheurs‐agriculteurs à l'intégration croissante au marché en République du Congo

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
A substantial body of anthropological research has investigated how subsistence communities engage with market‐based economies. In this study, we contribute to this body of work by examining adolescent orientations towards intensifying market integration in the Congo Basin.
Sheina Lew‐Levy   +12 more
wiley   +1 more source

Lévy Distribution Meta-Heuristic Fuzzy-Based Optimization Algorithm for Optimal Framework Design of Type-2 Fuzzy Controller: Subject to Perturbations

open access: yesProceedings
New metaheuristic algorithms have recently been created based on Lévy Flight (LF), drawing inspiration from biological and natural events [...]
Himanshukumar Rajendrabhai Patel
doaj   +1 more source

Idősorok analízise és sztochasztikus fraktál modellek tanulmányozása alkalmazásokkal = Time series analysis and fractal models with applications [PDF]

open access: yes, 2008
Frakcionális Ornstein-Uhlenbeck lepedő tulajdonságait vizsgáltuk abból a szempontból, hogy olyan modellt konstruáljunk, aminek spektruma az origó környezetében nem izotróp módon viselkedik.
Fazekas, István   +4 more
core  

Levy Flights in Inhomogeneous Media

open access: yes, 2003
We investigate the impact of external periodic potentials on superdiffusive random walks known as Levy flights and show that even strongly superdiffusive transport is substantially affected by the external field.
C. W. Gardiner   +6 more
core   +1 more source

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