Methods are investigated in order to partition in k groups a set of n multivariate observation vectors located at neighboring geographic sites; applications include image segmentation, ecological or soil data cartography. In this perspective, the deterministic variant of the EM procedure described in Zhang (1992) for hidden Markov random fields is shown to be equivalent to the optimization of a...

INTRODUCTION Poorly reversible airflow obstruction may or may not be related to smoking. OBJECTIVES To describe patients with severe obstructive lung disease including etiology, imaging, functional aspects, systemic manifestations, and the pattern of bronchodilator response. METHODS Sixty-eight patients (age 55.9±13.7 years, FEV(1) [forced expiratory volume in one second] 31.9±10.2% predict...

Some nineteenth-century hypnosis researchers did not limit their interest to the study of the conventional psychological and behavioral aspects of hypnosis, but also studied and wrote about psychic phenomena such as mental suggestion and clairvoyance. One example, and the topic of this paper, was French physician Ambroise August Liébeault (1823-1904), who influenced the Nancy school of hypnosis...

Cell polarity in vivo PAR proteins play conserved roles in cell polarization in diverse animal systems. Daniel Dickinson (Bob Goldstein laboratory, University of North Carolina at Chapel Hill) developed a method for analyzing biochemical interactions in single cells and used it to show that PAR proteins transiently form oligomeric complexes in Caenorhabditis elegans zygotes. Formation of these ...