From the analogy between pulses propagation in time and the paraxial optics, the nonlinear Kerr media is approached by a time quadratic index media.

The firm's shares have performed badly, falling twice as fast as the Dow Jones Stoxx media index over the past 12 months. That is mostly due to its high exposure to print media, which is struggling.

Media preference can be specified for an index or keyed file to request that the underlying index object be allocated on SSD storage.