Abstract: A system including compressed executable codes copies and decompresses the executable codes into a volatile memory buffer, then executes the codes. Modules containing compressed executable codes may be downloaded from a server via a wireless connection. Software development environments to prepare compressed executable modules are also described.

Abstract: The invention relates to novel non-ionic compounds of formula ##STR1## These compounds can be used as contrast media.

Abstract: Solar collector of the heat pipe type, comprising in per se known manner a case or container containing a heat pipe absorber of the solar energy, insulation placed between the absorber and the bottom of the container, at least one glass partition on the container, as well as the devices necessary for assembling and sealing the system, said heat pipe absorber being constituted by a tightly sealed case formed by a first heat collecting wall, a second wall forming the base and sidewalls, a capillary system lining the inside of the case and a heat transfer fluid which wets this capillary system, wherein the capillary system comprises a first part applied to the first wall and a second part applied to the second wall and wherein at least one of the said first and second walls is deformable under the action of an overpressure in the case, said first and second parts of the capillary system having no point of contact when the wall is deformed and at least one line of contact when the wall is not deformed.

Abstract: Solar sensor with linear concentration with a fixed receiver and movable mirrors.The solar sensor with a linear concentration comprises a system of elementary segmental mirrors arranged along the generating lines of a cylinder portion and directs the solar rays towards a zone located in the vicinity of a generating line of said cylinder and a receiver having a linear configuration arranged in said zone, wherein the receiver is stationary and means are provided for giving the mirror system a rotational movement without sliding so that the zone at which the reflected rays are directed remains fixed and the direction of the reflected rays remains unchanged when the sun's position changes.