Abstract: A System for setting up communications between users of a telecommunication network (1, 10), comprising a central server (2), this server comprising: means (4) for receiving and memorizing user identifiers, associated with information necessary to set up a communication with the user's terminal and profile information based on which the user would like to get into anonymous communication with other service users; means for distributing the received profile information on user terminals (5, 8), and means for receiving requests from user terminals for setting up a communication based on user profile information, and means for setting up on request a communication between two user terminals; each user terminal comprising means for receiving and displaying user profile information sent by the central server, means for selecting the profile information of a user, and means for transmitting to the central server a request to set up a communication with the user corresponding to the selected profile information.

Abstract: Gas photonanograph for the production and optical analysis of nanometer scale patterns. The photonanograph has a gas expansion chamber equipped with a gas supply for producing patterns and provided at a first end with microcapillaries for the discharge of the gas, an optical fibre, which is sharp at a first end and which is to be positioned facing the sample to be treated, a light source coupled to the second end of the optical fibre, the latter being transparent to the light emitted by the light source, and detecting and processing apparatus for monitoring a light signal reflected by the sample. The photonanograph permits the localized etching or deposition of materials for microelectronics or microoptoelectronics.

Abstract: The process for the photochemical treatment of a solid material consists of exposing the latter to light pulses produced by at least one glow discharge elongated tube (4) having a rare gas under low pressure and whereof the gas, the pressure and the characteristics of the discharge are adapted to said material and its precursors, each pulse containing an extensive emission spectrum between 160 and 5000 nm. An electrical circuit with modulatable electrical characteristics (LC) makes it possible to modulate the discharge characteristics of the tube and the storage of the energy necessary for said discharge.