Preface This book would not have existed without the excellent contributions by the emain grateful to the reviewers for their constructive comments. The excellent editorial assistance by the Springer-Verlag is acknowledged. Marek r. ogiela Lakhmi C. Ja australiaVI Preface This book would not have existed without the excellent contributions by the authors. We remain grateful to the reviewers for their constructive comments. The excellent editorial assistance by the Springer-Verlag is acknowledged. Marek R. Ogiela Poland Lakhmi C. Jain Australia