The Main-Sequence: The star now settles down to a long period of stability while the hydrogen at its centre is converted into helium with the release of an enormous amount of energy. This stage is called the main-sequence stage, a reference to the classical Hertsprung-Russell diagram (see the Figure below). Most stars lie in a well defined band in the diagram, and the only parameter that determines where in the band they lie is the star's mass.
Becoming a Professional Engineer (PE) A Professional Engineer (PE) is an engineer certified by a state board of registration to practice engineering. The PE license is the engineering profession's highest standard of competence, a symbol of achievement and assurance of quality. The College of Engineering believes that professional registration is an important goal for engineering graduates. Passing the FE Exam is the first step toward that goal.
What is Energy Engineering? Some of the most interesting and productive developments in engineering have taken place at the interfaces between conventional engineering disciplines, for example bio-engineering which crosses the boundaries between medicine and engineering. Another good example is Energy Engineering. This is usually taken to mean the application of a mix of engineering disciplines , such as mechanical and electrical engineering, to solving the problems of extracting, collecting and utilising energy resources to satisfy human needs without destroying the environment.