HCl in Italy Virtual ECHO An Interface for a Simulated Environment Daniela Meloni, AlessandroMura, FrancescoS. Nucci,Angelo Cangelosi,Maria Beatrice Ligorio ECHO is a simulated environment with multimedia technology aimed to training specialized technical staff in using radar techniques. The system was designed using the user-centeredperspective and a relevant knowledge acquisition phase in order to define a suitable Human-Computer Inter~ce. The inter~ce chosenJbr the system is the visit metaphor in order to leave the student~ee in exploring a virtual environment. ECHO was designed by the Advanced Methodologies and InterJhce Design group (MEDIA group), of the L.I. T (Laboratory of In~rmation ~chnologies) of the Alenia The paper, after a briefMEDIA group description, discussesthe theory (as the theoreticalfkamework and system architecture), as well as the user inter~ce specificaspects (as the basic idea, thefimctionalities, and the inteo~ce structure). Finally the paper describes some implementation notes. Alenia's position of excellence in so many different fields is the best indication of a company that, thanks to substantial investments in research and development, makes an important contribution to the world's technological progress. In this context the MEDIA group is particularly dedicated to the Human Computer Interface research. The group is composed of researchers from several backgrounds:
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