This volume contains all the papers presented at the Eleventh International C- ference on Algorithmic Learning Theory (ALT 2000) held at Coogee Holiday Inn, Sydney, Australia,11 13 December 2000. The conference was sponsored by the School of Computer Science and Engineering, University of New South Wales, and supported by the IFIP Working Group 1.4 on Computational Learning T- ory and the Computer Science Association (CSA) of Australia. In response to the call for papers 39 submissions were received on all aspects of algorithmic learning theory. Out of these 22 papers were accepted for p-...

Food irradiation, a treatment of food by ionizing energy of gamma, electron beam or X-rays, with its unique advantages, is emerging as an important food processing method. It can be used for improving food security, ensuring food safety, and for obtaining market access by overcoming quarantine barriers to international trade. The need for reliable and routine testing methods to determine whether or not food has been irradiated has arisen as a result of the increased commercialization of the technology, growth in international trade in irradiated foods, and demand for labeling of the treated...