Innaxis. Innaxis is a non-profit private research institute founded under the coverage of law 50/2002. The research lines of Innaxis are centered around the applications of the Science of Complexity to the solution of social and economical problems. With that purpose, Innaxis works in collaboration with other members coming from universities, research institutes and private companies. In particular, the activities of Innaxis are focused in the application of tools coming from complex systems analysis to fields such as transportation, energy or information technologies. Innaxis is involved in several projects in progress, being the leader in some of them. These projects include collaborations with private companies such as DFS, Boeing, Isdefe, ONERA, Rheinmetal, Iberia, RENFE, Aena, Airports of París, Boeing, CREATE-NET, DLR, Honeywell, Isdefe, M3 Systems, SENASA, Telefónica I+D and TRT. The interest of Innaxis in the current project is related with the optimization of resources and fluxes of passengers/goods in air transportation networks.

Bmat. Barcelona Music and Audio Technologies (Bmat), with CIF B-64124308, is a technological company specialized in products and services related with music technologies. Bmat is considered as a leader company in the analysis of audio and music, as well as in the development of search and recommendation engines. Their products have been integrated in search systems (Comperio-Fast, Exalead), music commercial distributors (The Orchard), on-line stores (Musana), portable equipment (Yamaha) and chips (Intel). The interest of Bmat in the current project is based on the possible applications of the theory of complex networks to the design of music recommendation algorithms.