To adapt users’ input and tasks an interactive system must be able to establish a set of assumptions about users’ profiles and task characteristics, which is often referred as user models. However, to develop a user model an interactive system needs to analyze users’ input and recognize the tasks and the ultimate goals users trying to achieve, which may involve a great deal of uncertainties. In...

Correspondence: R.P. Baughman, Pulmonary and Critical Care Medicine, University of Cincinnati Medical Center, PO Box 670564, Cincinnati, OH, USA Heisenberg noted that a more accurate determination of one quantity will result in a less precise measurement of another. He proposed this principle to describe the difficulties encountered in quantum mechanics, but it has been encountered in all branc...

seemed possible, applied only to embryos created by fusion of egg and sperm – and not those made by cloning techniques. But after an appeal court overturned that ruling, the House of Lords gave the go-ahead to a government panel to issue licenses for therapeutic cloning research. Now the Judicial Office of the House of Lords has ruled that the anti-embryo research group ProLife Alliance can cha...

Many studies have shown that industrial products can exhibit a great variability in their vibratory and acoustical behaviour; but the influence of this physical variability on the perception of sound emitted by these products has not yet been investigated. The aim of this study was to evaluate that influence in the case of a computed system, including a force source linked to a plate through th...

R.S. Thorne Cavendish Laboratory, University of Cambridge, UK Abstract I discuss the issue of uncertainties in parton distributions and in the physical quantities which are determined in terms of them. While there has been significant progress on the uncertainties associated with errors on experimental data, there are still outstanding questions. Also, I demonstrate that in many circumstances t...

Luc Demortier The Rockefeller University, New York, NY 10021, U.S.A. Abstract The standard Bayesian treatment of systematic uncertainties is to integrate out the corresponding nuisance parameters from the joint posterior density for all parameters. We apply this formalism to measurements in which the data cannot distinguish between nuisance parameters and parameters of interest, and show that i...

The CATRASYS (Cassino Tracking System) measuring system is a wire tracking system used for determination of poses of objects in the space. It is well modeled as a 3-2-1 parallel manipulator. Pose determination is done by solving the Direct Kinematics, which relies on geometric parameters and measurements, both subject to uncertainties. In this paper an uncertainty model based on intervals is co...

The differences are discussed between various next-to-leading order prescriptions for the QCD evolution of parton densities and structure functions. Their quantitative impact is understood to an accuracy of 0.02%. The uncertainties due to the freedom to choose the renormalization and factorization scales are studied. The quantitative consequences of the different uncertainties on the extraction...

In this chapter, we focus on those functionalities of multimedia databases that are not present in traditional databases but are needed when dealing with multimedia information. Multimedia data are inherently subjective; for example, the association of a meaning and the corresponding content description of an image as well as the evaluation of the differences between two images or two pieces of...

In this paper, we investigate two stochastic perturbations of the metamorphosis equations of image analysis, in the geometrical context of the EulerPoincaré theory. In the metamorphosis of images, the Lie group of diffeomorphisms deforms a template image that is undergoing its own internal dynamics as it deforms. This type of deformation allows more freedom for image matching and has analogies ...