Abstract: The direct matrix converter is a well-accepted topology for AC/AC converters. The commutation method should be considered in the direct matrix converter topology to avoid failures caused by ...

Q. I have heard of something called seed inoculation, but I don’t really understand it or where to start. Could you help me educate me on that? — Daniel P.

A 91-year-old man with a history of bladder carcinoma and left total knee arthroplasty was evaluated because of left knee pain. A culture of synovial fluid showed no growth. A diagnosis was made.