The CAT Imaging Telescope for Very-High-Energy Gamma-Ray Astronomy

The CAT (Cherenkov Array at Themis) imaging telescope, equipped with a very-high-definition camera (546 fast phototubes with 0.12 degrees spacing surrounded by 54 larger tubes in two guard rings) started operation in Autumn 1996 on the site of the former solar plant Themis (France). Using the atmospheric Cherenkov technique, it detects and identifies very high energy gamma-rays in the range 250 GeV to a few tens of TeV. The instrument, which has detected three sources (Crab nebula, Mrk 421 and Mrk 501), is described in detail.Comment: 24 pages, 15 figures. submitted to Elsevier Preprin

Towards Multimodal User Interfaces Composition Based on UsiXML and MBD Principles

International audienceIn software design, the reuse issue brings the increasing of webservices, components and others techniques. These techniques allow reusingcode associated to technical aspect (as software component). With thedevelopment of business components which can integrate technical aspect withHCI, the composition issue has appeared. Our previous work concerned theGUI composition based on an UIDL as UsiXML. With the generalization ofMultimodal User Interfaces (MUI), MUI composition principles have to bestudied. This paper aims at extend existing basic composition principles inorder to treat multimodal interfaces. The same principle as in the previouswork, based on the tree algebra, can be used in another level (AUI) of theUsiXML framework to support the Multimodal User Interfaces composing.This paper presents a case study on the food ordering system based onmultimodal (coupling GUI and MUI). A conclusion and the future works in theHCI domain are presented