Abstract: There is described a method of making media files, for example video clips available for delivery to portable electronic devices, for example mobile phones. The method comprises receiving media content as data input at an encoder and encoding the media content to generate a plurality of output files each having the media content. Each of the plurality of output files is specially adapted by the encoder for use with a different model of mobile phone. The plurality of output files are stored on a server for downloading there from over a communications network. A user can download to a computer an output file compatible with his or her mobile phone and transfer the file for the computer to the mobile phone.

Abstract: This invention provides a method for fabricating geometrical diamond/matrix composites where all or a part of surfaces of the matrix are covered with a diamond film, and to fabricate hollow diamond shells using the composites where a part is uncoated with a diamond film. Hollow diamond shells were prepared by etching out of the matrix soluble with chemicals through an opening, a zone on the matrix, uncoated with diamond film. By changing the shape and the size of the geometrical matrixes, various kinds of diamond/matrix composites and diamond shells in shape and in size can be fabricated. The sizes available are between 200 nm and 2 mm.