A GENERIC AUGMENTED REALITY TELESCOPE FOR HERITAGE VALORIZATION

Heritage valorisation is one of the greatest challenges that face countries in preserving their own identity from the globalization process. One of those scientific areas which allow this valorisation to be more attractive and at its bravest is the augmented reality. In this paper, we present an innovative augmented reality telescope used by tourists to explore a panoramic view with optional zooming facility, allowing thereby an accurate access to heritage information. The telescope we produced is generic, ergonomic, extensible, and modular by nature. It is designed to be conveniently set up anywhere in the world. We improve the practical use of our system by testing it right in the heart of Paris within a specific use case

FEATURE-BASED QUALITY EVALUATION OF 3D POINT CLOUDS – STUDY OF THE PERFORMANCE OF 3D REGISTRATION ALGORITHMS

The production of realistic 3D map databases is continuously growing. We studied an approach of 3D mapping database producing based on the fusion of heterogeneous 3D data. In this term, a rigid registration process was performed. Before starting the modeling process, we need to validate the quality of the registration results, and this is one of the most difficult and open research problems. In this paper, we suggest a new method of evaluation of 3D point clouds based on feature extraction and comparison with a 2D reference model. This method is based on tow metrics: binary and fuzzy

Dependence of hole effective mass on nitrogen concentration in W-type strained InAs(N)/GaSb/InAs(N) quantum well lasers

We have investigated the effects of nitrogen N concentration on the properties of hole subbands and effective mass in dilute-nitride type-II InAsN/GaSb laser diodes on InAs substrate with “W” design. Using a 5-bands k·p model, we obtained interesting numerical results for the heavy-hole (hh) and the light-hole (lh) subbands. The hole effective masses were found to be very sensitive to the nitrogen concentration and to the differences in the Luttinger parameters between the well and the barrier. In addition, the hole effective masses are found to be strongly affected by band-anticrossing (BAC) model

THEORETICAL COMPARISON OF DILUTE-NITRIDE "W" AND "M" InAsN / GaSb MID-INFRARED LASER DIODES

International audienc

Warm-up with dynamic stretching : Positive effects on match-measured change of direction performance in young elite volleyball players

Purpose: To explore the immediate (15-s post-warm-up) and the delayed (after 20 and 40 min of simulated volleyball play) effects of 2 different warm-up protocols-a stretching-free volleyball warm-up (NS) and a warm-up incorporating dynamic stretching (DS)-on subsequent change of direction (COD) performance in young elite volleyball players. Methods: Sixteen male players (age 16.88 [0.34] y, body mass 75.81 [5.41] kg, body height 1.91 [0.05] m, body mass index 20.84 [1.79] kg\ub7m-2, and body fat percentage 9.48 [1.83]%) fromthe U-17 national volleyball team performed NS and DS on 2 different nonconsecutive days. During each testing session (NS and DS), half T-test performance measurements were performed after 5 minutes of a general warm-up (ie, baseline), immediately post-warm-up (after 15 s), and after 20 and 40 minutes of simulated volleyball play. Results: For DS, a significant improvement in COD performance (2.08%, P < .001) was observed after 20 minutes of play compared with the baseline values. In addition, COD performance recorded after 40 minutes of play was better than after 15-second post-warm-up (5.85%, P = .001). Inferential statistics showed better COD performance in the DS condition after 20 minutes of play (2.32%, likely negative, d = 0.61). Conclusions: Compared with NS, DS tended to affect the pattern of improvement of COD performance during play by intensifying and accelerating it. Consequently, to enhance COD performance for up to 40 minutes into the game, it is recommended that DS be incorporated to the warm-up preceding the match

Optical gain calculation of dilute Nitride InAsN/GaSb laser diodes operating in the mid-infrared

International audienc

InAsN/GaSb/InAsN ‘W’ quantum well laser for mid-infrared emission: from electronic structure to threshold current density calculations

International audienc

A theoretical study of laser structures based on dilute-nitride InAsN for mid-infrared operation

International audienc

Dilute-Nitride "W" and "M" InAsN/GaSb laser diodes for gaz analysis in the mid-infrared domain

International audienc