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.
ECE is an initialism with disparate meanings, including: 1  Electrical and computer engineering, a discipline that combines electrical engineering and computer science and engineering. Electronics and communication engineering, a discipline that combines electronics engineering and Computer, Information and communication technology. 2  United Nations Economic Commission for Europe, a United Nations agency promulgating automotive technical regulations based on international consensus.