Mr. Mirosław Stawniak and Mr. Adam Wójtowicz received Ph.D grade in informatics from The Council of the Faculty of Electronics, Telecommunications and Informatics of the Gdańsk University of Technology. Mr. Stawniak defended a PhD thesis entitled  "Search Method of Information Resources Related by Theme, Space and Time", and Mr. Wójtowicz a PhD thesis entitled "Selective Semantic Modeling Method SSM for Building Secure Multiaccess Virtual Environments”, both prepared under supervision of prof. Wojciech Cellary.