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A one step prediction error approach to the identification of viscoplastic material models

A new approach to the problem of estimating parameter in material models is presented. The approach is based on a state space representation of the constitutive equations and one step predictions. The differences between one-step predictions and the corresponding measurements are used to design generic one-step prediction error estimators, and in particular, the maximum likelihood method is presen

Flexible Force Control for Accurate Low-Cost Robot Drilling

The problem of robot drilling presents a significant challenge, due to the comparatively low mechanical stiffness of typical serial industrial robots. This compliance makes the robot deflect due to the cutting forces, resulting in poor hole quality. Recently, functionality for high-bandwidth force control has found its way into industrial robot control systems. This could potentially open up the p

Knowledge-based reconfiguration of automation systems

This article describes the work in progress on knowledge-based reconfiguration of a class of automation systems. The knowledge about manufacturing is represented in a number of formalisms and gathered around an ontology expressed in OWL, that allows¨generic reasoning in Description Logic. In the same time multiple representations facilitate efficient processing by a number of special-purpose reaso

Binary Statistics from Hipparcos

Book abstract: The book reviews recent observations of non-evolved and evolved binary populations in clusters and the field with special emphasis on statistical biases, incompleteness and distribution functions. Different binary types are considered: cataclysmic variables, super-soft X-ray sources, double degenerate binaries, Algol-type binaries, Be binaries, X-ray binaries, and Wolf-Rayet binarie

Directional Analysis of Vehicle-to-Vehicle Propagation in Different Traffic Environments

This paper presents a double directional analysis of vehicle-to-vehicle channel measurements conducted in two different traffic environments. Using a high-resolution algorithm, we derive channel parameters like angle-of- arrival, angle-of-departure, propagation delay and Doppler’s spread and identify underlying propagation mechanisms by combining these estimates with maps of the measurement sites.

On the evaluation of layer potentials close to their sources

When solving elliptic boundary value problems using integral equation methods one may need to evaluate potentials represented by a convolution of discretized layer density sources against a kernel. Standard quadrature accelerated with a fast hierarchical method for potential field evaluation gives accurate results far away from the sources. Close to the sources this is not so. Cancellation and nea

Fantastiska fröknar. Studier av lärarinnegestalter i svensk skönlitteratur

Popular Abstract in Swedish Giftaslystna guvernanter, profitinriktade pensionföreståndarinnor, flickskolelärarinnor som arbetar för rösträtt, småskollärarinnor som blir överfallna i ensliga skolor på landet, folkskollärarinnor som blir med barn och gymnasielärarinnor som älskar sina elever - i Fantastiska fröknar presenteras en rad olika kvinnoöden, alltifrån Emma Rönnqvist i Fredrika Bremers PresThis dissertation deals with women teachers in Swedish fiction by both male and female authors in the period from 1830 to 2003. It presents and discusses life narratives of individual fictional teachers in 127 texts. The study is organised chronologically and thematically and includes the historical and cultural framework. It should be seen as a contribution to the debate about the value of using