title: Chairmen's welcome
abstract: We are happy to welcome all our participants in the beautiful Crimea city of great ancient history - Sevastopol, which hosts for five days (6–10 September, 2010) the fifth International Conference ‘Ultrawideband and Ultrashort Impulse Signals’ (UWBUSIS'10). The venue of the conference is one of the largest technical university of Ukraine, Sevastopol National Technical University. The main organizers of the conference are as usually Kharkov IEEE Joint Chapter, Karazin Kharkiv National University 