The association of statistical models and multiresolution data analysis in a consistent and tractable mathematical framework remains and intricate theoretical and practical issue. Several consistent approaches have been proposed recently to combine Markov Random Field (MRF) models and multiresolution algorithms in image analysis: renormalization group, subsampling of stochastic processes, MRFs ...

This paper describes a method to automatically generate the mapping between a completely labeled reference image and the 3D medical image of a patient. To a c hieve this, we combined three techniques: the extraction of 3D feature lines, their matching using 3D deformable line models, the extension of the deformation to the whole image space using warping techniques. We present experimental resu...

One of the most widely used technique to obtain transient measures is the uni-formization method. However, although uniformization have many advantages, the computational cost required to calculate transient probabilities are very large for stii models. We study eecient solutions that can be applied to an approximate method developed for calculating transient state probabilities of Markov model...

A investigação química das plantas Phyllanthus cochinchinensis (Euphorbiaceae) levou ao isolamento de três novos glicosídeos fenólicos, filantuosídeos A-C, juntamente com 12 compostos conhecidos. Suas estruturas foram determinadas com base em extensivas análises espectroscópicas e métodos químicos. Dentre eles, filantuosídeos A e B são dois glicosídeos fenólicos raros, com um esqueleto C6-C3-C6...

We present and evaluate a web-based architecture for monitoring student-system interaction indicators in Exploratory Learning Environments (ELEs), using as our case study a microworld for secondary school algebra. We discuss the challenging role of teachers in exploratory learning settings and motivate the need for visualisation and notification tools that can assist teachers in focusing their ...

Artigo recebido em 24 de setembro de 2012 Artigo aprovado em 1 de outubro de 2012 Descritores: Revascularização miocárdica. Ponte de artéria coronária. Procedimentos Cirúrgicos cardíacos/História. História. Descriptors: Myocardial revascularization. Coronary artery bypass. Cardiac Surgical Procedures/History. History. Sempre preocupada com o resgate histórico da cirurgia cardiovascular, a Revis...