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The materials published here are collected and condensed from journals, textbooks, research material and?experience. The greatest possible care has been taken to ensure that it is accurate and complete. The information provided here is meant for general awareness. The author?cannot be held responsible for any?damage to persons as a matter of? liability, negligence or otherwise or from any use or operation of any methods, products, instructions or ideas contained in the material herein. . The? methods and articles published?here are the opinion of the author. The articles published here in?belong solely to the authors and should not be reproduced in any manner what so ever printed or thro any method due to any future developement.