Identification and one-pass coding objects by image analysis

This paper describes the coding phase that precedes a pattern recognition in a system of automatical object detection . The shapes to be analysed are modelled by simple geometrical figures (rectangle, ellipse) ; this identification is made by a one pass calculation of the smaller number of geometrical characteristics (moment order 0, 1 and 2) . This method gives automatically a classification of all the objects present in the field and defines the zero level of coding. When the objects contain points of ramification, their shape are modelled with several primary figures, a higher level of coding is then defined. This procedure leads to a more or less precise representation of the object to be recognized ; the choice of the level representation depends on the current application . All the steps, computation of geometrical properties, identification of parameters and construction of an arborescent pattern of structure are obtained in one pass mode. This method is particularly well suited when the image analysis is sequential (Une by line) and avoids a storage of the total image.On présente le module de codage précédant la phase de reconnaissance des formes dans un système de détection automatique d'objet

A coustical contribution to automatic identification of moving objects

This paper sets out an automatic identification system-based on an acoustic principle-with regard to animals . The animal carries a resonant object which produces a sound when it moves . Thus, the animal is identified by the emitted sound. First a probability then frequential model leads to an algorithm of identification involving a system eliminating interférence . Front these results, we have developped a prototype which permits the testing of the efficiency on the spot . Finally, we have tested the reliability of this new type of identificator .Description d'un dispositif d'identification automatique d'animaux fondé sur un principe acoustiqu

Integration of safety starting at the production system design stage Modelling of the human/machine interaction in product operation at the design stage

Translated from FrenchAvailable from British Library Document Supply Centre-DSC:9022.381(no 16306(C))T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Power deposition studies for betatron halo losses in HL-LHC

The Large Hadron Collider (LHC) is equipped with a betatron halo collimation system designed to prevent magnet quenches during periods of reduced beam lifetime. Protons subject to single diffractive scattering in collimators can nevertheless leak into the adjacent dispersion suppressors (DS). In view of the future high-luminosity (HL) upgrade of the LHC, a better understanding of the quench margin in these DS magnets is needed, considering the increased beam current and the resulting higher beam losses of up to 1 MW of power within a few seconds, which the collimation system is designed to withstand. In this contribution, we present FLUKA power deposition simulations for a controlled beam loss experiment at 6.8 TeV, probing the quench level of the superconducting magnets most exposed to collimation losses. The results are compared with the expected power deposition in HL-LHC operation, considering different collimator settings. In particular, we studied the power deposition for relaxed collimator gaps, which are considered as the baseline configuration for initial operation in Run 4

Evaluation of Short-Term Pacing Effect to Predict Long-Term Response to Cardiac Resynchronization Therapy: The TRAJECTORIES Study

Cardiac resynchronization therapy (CRT) is an effective treatment for chronic symptomatic systolic heart failure with cardiac dyssynchrony, but about 1/3 of patients do not respond favorably to the therapy. We hypothesized that acute modifications of the coronary sinus (CS) pacing cathode movements induced by biventricular pacing may be related to resynchronization process and consequently may carry predictive power on CRT response. A method for the 3D reconstruction of CS lead's pacing cathode trajectory (3DTJ) throughout a cardiac cycle showed that trajectory's geometry suddenly changed in responders (R) upon starting of biventricular pacing, becoming less eccentric and more multi-directional. Our multicenter observational study aimed at evaluating the clinical value of 3DTJ. Out of 119 patients enrolled, 50 have ended follow-up and have been analyzed. Concordance between 3DTJ metrics and response was 82% overall (41/50), 91% in R (31/34), 62% in NR (10/16). The proposed 3DTJ metric showed high sensitivity (91%) with specificity=62%; PPV=84%, NPV=77%. From our data, 3DTJ seems a promising tool to acutely predict CS pacing site-specific response to CRT. Its investigational use as an intra-operatory, real-time guidance for selecting LV pacing sites may open new opportunities for CRT patients' selection and therapy delivery