I am by character quite unsystematic. That has cost me many things. Yet I do not like to change.
Because I find our mother nature is unsystematic. It is only we who have gone out of nature’s
way to become systematic to meet our own objectives, the natural consequences of which are
environmental crisis, lack of imagination and increased disharmony, conflict and wars. Water
flows from hill to plain following haphazard paths. We make dams to make some systemic
control, which is the cause of floods to my mind. We destroy un systemic natural forest to build
systematic towns and cities, the consequence of which is environmental problem. There need to
have science and technology for development and growth as we want but in nature’s way. This
will give a better society. I sincerely believe students should be given guidance in natural way,
and he has himself to become mastery of systematic integration of knowledge so earned and
acquired subsequently. Lots of scopes need to be left out for students to imagine and think. I do
not like to teach a kid, as is done in all cases first +, then –, but I prefer to leave—to the kid after
teaching him/her +, so that the himself/herself may discover—for which some tips may be given.
This is exactly what I try in high-level teaching in institutes/universities. I was wondering to
prepare a manuscript following this philosophy of teaching that creates imagination in the
students. Accordingly the present book is not that way a so called systematic book, but a book
for my way of teaching. The chapters in the book have been prepared in a way to make them
independent to each other as far as possible. This will make readers to read chapter as chosen,
being independent on other chapters. Besides, I wonder the present practice of writing books
that on a same subject there will be separately one for B Tech level, one for M Tech level and
another one for research level. This practice is not appropriate for the students of developing
countries. For our students, a concise book for all levels is appropriate, and is surely possible to
prepare. My attempt does not belie this motivation in this book too. However I do believe my
different strokes in writing this book will be best judged by readers. The criticism is welcome