US National Report to International Union of Geodosy and Geophysics 1987–1990, Review of Geophysics, Supplement, pp. 1143–1165. Hedin AE and Carignan GR (1985)Morphology of thermospheric composition variations in the quiet polar mesosphere from Dynamics Explorer measurements. Journal of Geophysical Research 90: 5269–5277. Killeen TL (1987) Energetics of the Earth’s thermosphere. Reviews of Geop...

Many techniques have been developed to measure the difficulty of forecasting data from an observed time series. This paper introduces a measure which we call the "forecast entropy" designed to measure the predictability of a time series. We use attractors reconstructed from the time series and the distributions in the regular and tangent spaces of the data which comprise the attractor. We then ...

The scientific objectives of the effort are to apply several techniques developed within the program, including Monte Carlo ensemble approaches, techniques adapted from non-linear systems analysis and optimal combinations of forecasting approaches to estimating the intrinsic limits to predictability for (i) tropical cyclone mean forecast position errors in the first instance, and (ii) to tropic...

Objectives. Operative clinical trials are often small and open-label. Randomization is therefore very important. Stratification and minimization are two randomization options in such trials. The first aim of this study was to compare stratification and minimization in terms of predictability and balance in order to help investigators choose the most appropriate allocation method. Our second aim...

We consider a two-period portfolio problem with predictable assets returns. First-order (second-order) predictability means that an increase in the first period return yields a first-order (second-order) stochastically dominated shift in the distribution of the second period state prices. Mean reversion in stock returns, Bayesian learning, stochastic volatilities and stochastic interest rates (...

This paper describes a detailed study of aggregated network traffic using time series analysis techniques. The study is based on three sets of packet traces: 175 short-period WAN traces from the NLANR PMA archive (NLANR), 34 long-period WAN traces from NLANR archive (AUCKLAND), and the four Bellcore LAN and WAN traces (BC). We binned the packets with different bin sizes to produce a set of time...

BACKGROUND The aim of this study was to evaluate the predictability of F22 aligners (Sweden & Martina, Due Carrare, Italy) in guiding teeth into the positions planned using digital orthodontic setup. METHODS Sixteen adult patients (6 males and 10 females, mean age 28 years 7 months) were selected, and a total of 345 teeth were analysed. Pre-treatment, ideal post-treatment-as planned on digita...

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Sources of predictability in the basic laws of physics are described in the most general theoretical context — the quantum theory of the universe as a