Mauris G.,University of Savoy
International Journal of Approximate Reasoning | Year: 2011
The paper presents a possibility theory based formulation of one-parameter estimation that unifies some usual direct probability formulations. Point and confidence interval estimation are expressed in a single theoretical formulation and incorporated into estimators of a generic form: a possibility distribution. New relationships between continuous possibility distribution and probability concepts are established. The notion of specificity ordering of a possibility distribution, corresponding to fuzzy subsets inclusion, is then used for comparing the efficiency of different estimators for the case of data points coming from a symmetric probability distribution. The usefulness of the approach is illustrated on common mean and median estimators from identical independent data sample of different size and of different common symmetric continuous probability distributions. © 2011 Elsevier Ltd. All rights reserved.
Revil A.,Colorado School of Mines |
Revil A.,University of Savoy
Water Resources Research | Year: 2012
I developed a new model named POLARIS describing the complex conductivity of (pyrite-free) shaly poorly sorted sands. This model is based on the solution given by the effective medium theory for grains coated by an electrical double layer and immersed in a background electrolyte. The electrical double layer comprises the Stern layer and the diffuse layer. Both layers play very distinct roles in the in-phase and quadrature conductivities. The polarization of the shaly sands is mainly controlled by the polarization of the Stern layer (except at very high salinities) with a very small mobility of the counterions contained in this layer. The in-phase component of the conductivity is controlled by the conductivity of the pore water with a contribution associated with the diffuse layer (the contribution of the Stern layer seems negligible). The fraction of counterions in the Stern layer is computed from a simple sorption isotherm and is used to infer the quadrature conductivity. The quadrature conductivity is assumed to be frequency independent, which is a reasonable approximation in clayey sands and sandstones, in agreement with observations. The polarization model is also based on the assumption that the Stern layer is discontinuous between grains, an assumption that is consistent with recent models of ionic transport in clayey sands. POLARIS explains the dependence of the quadrature conductivity on the salinity, cation exchange capacity, specific surface area (or specific surface per unit pore volume), and temperature. It can be used to predict the saturation and the permeability (inside 1 order of magnitude). Copyright 2012 by the American Geophysical Union.
Buskulic D.,University of Savoy
Classical and Quantum Gravity | Year: 2010
A very low latency search pipeline has been developed for the LIGO S6 and Virgo VSR2 science runs, targeting signals from coalescing compact binary systems with total mass from 2 to 35 solar masses. The goal of this search is to provide both single-detector triggers and multi-detector coincident triggers with a latency of a few minutes, the former for online detector monitoring and the latter to allow searching for electromagnetic counterparts to possible gravitational wave candidates. The features and current performance of this low latency search pipeline are presented. © 2010 IOP Publishing Ltd.
Glashow S.L.,Boston University |
Guadagnoli D.,University of Savoy |
Lane K.,Boston University
Physical Review Letters | Year: 2015
The LHCb Collaboration's measurement of RK=B(B+→K+μ+μ-)/B(B+→K+e+e-) lies 2.6σ below the Standard Model prediction. Several groups suggest this deficit to result from new lepton nonuniversal interactions of muons. But nonuniversal leptonic interactions imply lepton flavor violation in B decays at rates much larger than are expected in the Standard Model. A simple model shows that these rates could lie just below current limits. An interesting consequence of our model, that B(Bs→μ+μ-)exp/B(Bs→μ+μ-)SM≅RK≅0.75, is compatible with recent measurements of these rates. We stress the importance of searches for lepton flavor violations, especially for B→Kμe, Kμτ, and Bs→μe, μτ. © 2015 American Physical Society.
Bell E.,University of Savoy
Theoretical Criminology | Year: 2014
This article seeks to sketch out alternatives to neoliberal penality by seeking to undermine the four institutional logics of neoliberalism as identified by Loïc Wacquant (2009). It begins by critically analysing the potential value of public criminology as an exit strategy, suggesting that whilst this approach has much value, popular versions of it are in fact rather limited on account of their exclusion of offenders themselves from the debate and their optimism about the capacity of existing institutions to challenge the current punitive consensus. It suggests that a genuinely ‘public’ criminology should be informed by an abolitionist stance to both current penal policies and the neoliberal system as a whole. This may be the best means of truly democratizing penal politics. © The Author(s) 2014.