102,536 research outputs found
A study and catalogue of French flute music written between 1945 and 2008
No full textIncludes bibliographical references (leaves 352-368).French contemporary flute works are seldom performed outside France, and most of the composers are relatively unknown to the rest of the world. These works often include new instrumental performance techniques, known as ‘extended techniques’ or avant-garde techniques, which were developed by prominent flute performers in collaboration with composers. The study and performance of works which include extended techniques remain daunting to most South African flautists. Extensive research reveals no existence of a catalogue which represents all French composers and their works for flute after 1945. There is also a great shortage of available literature which prevents flautists, especially outside of Europe, from studying these works. The main objective of this dissertation is to fill this void
Regret minimization under partial monitoring
No full textWe consider repeated games in which the player, instead of observing the action chosen by the opponent in each game round, receives a feedback generated by the combined choice of the two players. We study Hannan-consistent players for these games, that is, randomized playing strategies whose per-round regret vanishes with probability one as the number n of game rounds goes to infinity. We prove a general lower bound of (n–1/3) for the convergence rate of the regret, and exhibit a specific strategy that attains this rate for any game for which a Hannan-consistent player exists
Au Pays jaune ! Aventure chinoise, paroles de G. Guibourg et G. Delatray, musique de W. Stoltz
No full text
Multi-scale analysis of the swelling and shrinkage of a lime-treated expansive clayey soil
No full textMinimizing regret with label efficient prediction
No full textAbstract — We investigate label efficient prediction, a variant, proposed by Helmbold and Panizza, of the problem of prediction with expert advice. In this variant the forecaster, after guessing the next element of the sequence to be predicted, does not observe its true value unless he asks for it, which he cannot do too often. We determine matching upper and lower bounds for the best possible excess prediction error, with respect to the best possible constant predictor, when the number of allowed queries is fixed. We also prove that Hannan consistency, a fundamental property in game-theoretic prediction models, can be achieved by a forecaster issuing a number of queries growing to infinity at a rate just slightly faster than logarithmic in the number of prediction rounds. Index Terms — label efficient prediction, prediction with expert advice, individual sequences, on-line learning I
A reduced model for shock and detonation waves. II. The reactive case
No full textInternational audienceWe present a mesoscopic model for reactive shock waves, which extends a previous model proposed in [G. Stoltz, Europhys. Lett. 76 (2006), 849]. A complex molecule (or a group of molecules) is replaced by a single mesoparticle, evolving according to some Dissipative Particle Dynamics. Chemical reactions can be handled in a mean way by considering an additional variable per particle describing a rate of reaction. The evolution of this rate is governed by the kinetics of a reversible exothermic reaction. Numerical results give profiles in qualitative agreement with all-atom studies
Improved second-order bounds for prediction with expert advice
No full textThis work studies external regret in sequential prediction games with both positive and negative payoffs. External regret measures the difference between the payoff obtained by the forecasting strategy and the payoff of the best action. In this setting, we derive new and sharper regret bounds for the well-known exponentially weighted average forecaster and for a second forecaster with a different multiplicative update rule. Our analysis has two main advantages: first, no preliminary knowledge about the payoff sequence is needed, not even its range; second, our bounds are expressed in terms of sums of squared payoffs, replacing larger first-order quantities appearing in previous bounds. In addition, our most refined bounds have the natural and desirable property of being stable under rescalings and general translations of the payoff sequence
Do countries falsify economic data strategically? Some evidence that they might.
No full textUsing Benford's Law, we find evidence supporting the hypothesis that countries at times misreport their economic data strategically. We group countries with similar economic conditions and find that for countries with fixed exchange rate regimes, high negative net foreign asset positions, negative current account balances or more vulnerable to capital flow reversals we reject the first-digit law for the balance of payments data. This corroborates the intuition of a simple economic model. The main results do not seem to be driven by countries in Sub-Saharan Africa or those with low institutional quality ratings.capital flows; public information provision; misinformation; Benford's Law; transparency
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