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Limits of the Allan Variance and Optimal Tuning of Wavelet Variance based Estimators

This article first demonstrates the inconsistency of the estimator based on the standard Allan Variance (AV) for composite stochastic processes. This result motivates the use of a recently developed estimator, called the Generalized Method of Wavelet Moments (GMWM) estimator. This estimator was previously shown to be consistent and asymptotically normally distributed under the...

Institution partenaire

Université de Genève

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English / 01/01/2013

N-acetylcysteine does not prevent contrast nephropathy in patients with renal impairment undergoing emergency CT: a randomized study

BACKGROUND: Patients admitted to the emergency room with renal impairment and undergoing a contrast computed tomography (CT) are at high risk of developing contrast nephropathy as emergency precludes sufficient hydration prior to contrast use. The value of an ultra-high dose of intravenous N-acetylcysteine in this setting is unknown. METHODS: From 2008 to 2010, we randomized 120...

Institution partenaire

Université de Genève

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English / 01/01/2013

An Algorithm for Automatic Inertial Sensors Calibration : Proceedings of the ION GNSS 2013

We present an algorithm for determining the nature of stochastic processes together with its parameters based on the analysis of time series of inertial errors. The algorithm is suitable mainly (but not only) for situations when several stochastic processes are superposed. In such cases, classical approaches based on the analysis of Allan variance or PSD are likely to fail due to the...

Institution partenaire

Université de Genève

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English / 01/01/2013

Robust Estimation of Bivariate Copulas

Copula functions are very convenient for modelling multivariate observations. Popular es- timation methods are the two-stage maximum likelihood and an alternative semi-parametric with empirical cumulative distribution functions (cdf) for the margins. Unfortunately, they can be hastily biased whenever relatively small model deviations occur at the marginal (empirical or parametric)...

Institution partenaire

Université de Genève

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English / 01/01/2013

Robust Estimation for Bivariate Distribution

Copula functions are very convenient for modelling multivariate observations. Popular estimation methods are the two-stage MLE and an alternative semi-parametric with empirical cdf for the margins. Unfortunately, they are hastily biased whenever relatively small model deviations occur at the marginal (empirical or parametric) and/or copula levels. In this master thesis we propose...

Institution partenaire

Université de Genève

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English / 01/01/2013

Economic Theory and Minority Language

Institution partenaire

Université de Genève

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English / 01/01/2013

Wavelet-Variance-Based Estimation for Composite Stochastic Processes

This article presents a new estimationmethod for the parameters of a times series model.We consider here composite Gaussian processes that are the sum of independent Gaussian processes which, in turn, explain an important aspect of the time series, as is the case in engineering and natural sciences. The proposed estimation method offers an alternative to classical estimation based on...

Institution partenaire

Université de Genève

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English / 01/01/2013

Les protections traditionnelles et le développement du système de sécurité social au Cameroun

Conçue comme contribution au projet de modernisation du système de sécurité sociale camerounais, cette thèse analyse l'état actuel de la législation en la matière tout en proposant des pistes de réflexion pour l'avenir. Alors que la première partie s'attache à décrire les mécanismes traditionnels d'entraide et de solidarité (tontines et mutuelles de santé)...

Institution partenaire

Université de Genève

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Français / 01/01/2013

Functional regulatory spaces

This article develops the concept of ‘‘Functional Regulatory Space'' (FRS) in order to analyze the new forms of State action addressing (super) wicked problems. A FRS simultaneously spans several policy sectors, institutional territories and levels of government. It suggests integrating previous policy theories that focused on ‘‘boundary-spanning regime,'' ‘‘...

Institution partenaire

Université de Genève

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English / 01/01/2013

Privacy, Democracy and Surveillance

How should we think about our claims to privacy and their relationship to security? Must we suppose that privacy should give way before the demands of security whenever the two cannot both be fully protected? This is the position presented by Sir David Omand on numerous occasions and, most recently, in his response to the revelations of Edward Snowden. However, this article shows,...

Institution partenaire

Université de Genève

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English / 01/01/2013

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