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History of Semiconductors - Cornell University
djena.engineering.cornell.educused around two important properties, i.e., rectification of metal-semiconductor junction and sensitivity of semicon-ductors to light and is briefly described in Subsections 2.1 and 2.2. 2.1. Rectification In 1874 Karl Ferdinand Braun observed conduction and rectification in metal sulfides probed with a …
6.061 Class Notes, Chapter 3: Polyphase Networks
ocw.mit.eduDepartment of Electrical Engineering and Computer Science 6.061 Introduction to Power Systems Class Notes Chapter 3 Polyphase Networks ∗ J.L. Kirtley Jr. 1 Introduction Most electric power applications employ three phases. That is, three separate power carrying circuite, with voltages and currents staggered symmetrically in time are used.