Available at: http://publications.ictp.it IC/2009/056 United Nations Educational, Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS RARE SEGMENTS IN TEMPORAL SIGNALS AND VIDEO RECORDINGS K. Koroutchev Escuela Politecnica Superior, Universidad Autonoma de Madrid, 28049 Cantoblanco, Madrid, Spain and The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy and E. Korutcheva 1 G. Nadjakov Institute. Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria, Departamento de Fisica Fundamental, UNED, Apdo. Correos. 50487, 28080 Madrid, Spain and The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy. MIRAMARE – TRIESTE August 2009 1 Senior Associate of ICTP.