Dear Ashok / Dr Vijay Kumar: Here is the paper I presentd at the Aachen colloquium [Click - A split word] last year. Mine was the only paper in English and all the other speakers spoke in German. This is the author's final version. It has appeared in a book [Gespaltene Welt? Technikzugange in der Wissensgesellschaft, edited by Max Kerner and Thomas Muller, and published by Bohlau Verlag, Koln, 2006]. Best wishes. Arun [Subbiah arunachalam] Dear Ashok / Dr Vijay Kumar: Here is the paper I presentd at the Aachen colloquium [Click - A split word] last year. Mine was the only paper in English and all the other speakers spoke in German. This is the author's final version. It has appeared in a book [Gespaltene Welt? Technikzugange in der Wissensgesellschaft, edited by Max Kerner and Thomas Muller, and published by Bohlau Verlag, Koln, 2006]. Best wishes. Arun [Subbiah arunachalam]