His initial contribution to this field was his doctoral thesis in 1962, published in book form in 1964; he later published several of the standard works on the subject. His theoretical work on hierarchical routing, done in the late 1970s with his then-student Farouk Kamoun, is now critical to the operation of today's world-wide Internet. The Int

I really love their photography and it is something I aspire to be kakım a travel photographer. Their photography often reflects travel bey it should be, rough and tumble, while showing a more human part of life in the places they visited. To me, that is one of the most powerful ways of telling travel stories. What I love about it: Aileen is on