Motivation for learning a new language is both self and time-oriented. The language learner’s motivation experiences gradual fluctuation over time and the view of oneself is different on each timescale of the study. Interaction among different timescales throughout the Second Language Development (SLD) is a novel area of investigation (de Bot, 2015). In order to probe this interactive nature, t...

In this paper we propose a new approach to estimating the systematic risk (the beta of an asset) in a capital asset pricing model (CAPM). The proposed method is based on a wavelet multiscaling approach that decomposes a given time series on a scale-by-scale basis. At each scale, the wavelet variance of the market return and the wavelet covariance between the market return and a portfolio are ca...

Constraining tropospheric mixing timescales using airborne observations and numerical models P. Good, C. Giannakopoulos, F. M. O’Connor, S. R. Arnold, M. de Reus, and H. Schlager National Observatory of Athens, Greece Centre for Atmospheric Science, Cambridge, UK School of the Environment, University of Leeds, UK Max-Planck-Institute for Chemistry, Atmospheric Chemistry Department, Mainz, Germa...

The method of multiple timescales is widely used in engineering and mathematical physics. In this article we draw attention to the literature on the comparison of various perturbation methods. We indicate where we can obtain an advantage from the concept of timescales, and we present examples where the anticipation of timescales makes sense and cases where, because of resonances or bifurcations...