Steering Between Extremes

Between Two Extremes: Examining Decompositions of the Ensemble Objective Function

We study how the error of an ensemble regression estimator can be decomposed into two components: one accounting for the individual errors and the other accounting for the correlations within the ensemble. This is the well known Ambiguity decomposition; we show an alternative way to decompose the error, and show how both decompositions have been exploited in a learning scheme. Using a scaling p...

Leptonic CP violation: zero, maximal or between the two extremes

Discovery of the CP-violation in the lepton sector is one of the challenges of the particle physics. We search for possible principles, symmetries and phenomenological relations that can lead to particular values of the CP-violating Dirac phase, δ. In this connection we discuss two extreme cases: the zero phase, δ = 0, and the maximal CP-violation, δ = ±π/2, and relate them to the peculiar patt...

Between Extremes: Health Effects of Heat and Cold

Although heat waves and cold snaps pose major health risks and grab headlines when they occur, recent studies have uncovered a more complex and perhaps unexpected relationship between temperature and public health. News | Focus C limate change is expected to have profound effects on weather patterns and temperatures worldwide in the coming decades, with serious implications for public health. f...

Meteorological Extremes

Extremes in Economics and the Economics of Extremes

Within econometrics, probability theory and statistics, an enormous literature exists on the topic of Extremes in Economics. See for instance Mikosch [47] and Klüppelberg [36] in this volume, and the numerous references listed in those contributions. For a long time, econometric research has shown that, for instance logarithmic returns of financial data are non–normal. Extremal moves up or down...