Acknowledgements Like my first book Electricity Cost Modeling Calculations, this book has been quite an endeavor and would not have been possible without the loving support of my family: my husband David and new daughter Samantha; my parents, David and Helen, who instilled in me the value of an education and strong work ethic; and my Graduate school professors, who believed in me and encouraged me when times were tough. They are: Partha Deb, David Freshwater, Roy Gardner, Robert Kirk, and Frank Scott.