 Hello, my name is Sami Hassein. I am a professor of energy and environmental engineering. Welcome to Fuel Science 432, patrolling and processing. I hope that you'll enjoy this course and we'll talk about all kinds of fuels and materials and chemicals made from crude oil. You'll probably hear the noise from the street. All the vehicles passing by, automobiles, trucks and buses, they all operate on petroleum right fuels. If you hear a plane passing by, that's also using jet fuel produced from petroleum. Now there are essentially two sectors when we talk about crude oil and petroleum. The sector that generates the crude oil produces crude oil from the ground with essentially the upstream sector. But we will be concerning ourselves and the scores with the downstream processing which is essentially refining. Now petroleum refinery is probably the most intricate set of chemical and physical processes that take a natural material, we call crude oil, that contains millions of compounds, convert them into fuels and materials and chemicals as we know and use them. It is really a showcase for process engineering or for chemical engineering so I really look forward to an exciting semester of learning how petroleum refinery operates, how do we classify crude oil, why are there different crude oils and what do we really do with crude oil and this integration for the number of chemical and physical processes. We'll get to know the terms such as cracking, polymerization, delayed coking, alkylation, all kinds of interesting names but by the end of the semester you will know what all these terms mean and how they are connected. I wish you a good semester of learning and see you in lessons and other class activities. Again, welcome to Fuelsales 432 and petroleum processes. Thank you.