This article gives a brief historical review of the evolution of power electronics over the past 100-plus years. It includes electrical machines, mercury-arc rectifiers, gas tube electronics, MAs, power semiconductor devices, converter circuits, and motor drives.
Gender Prediction Test. Intelligender is an at-home gender test that uses a urine sample from the mother. It can be given as early as 10 weeks into pregnancy and as late as 34 weeks. It is done completely at home. Laboratory tests have proved over 90 percent accurate, with at-home tests proving up to 82% accuracy.
At-home STI testing. Gaining acceptance and popularity are at-home test kits for certain STIs, such as HIV, chlamydia and gonorrhea. For home STI testing, you collect a urine sample or an oral or genital swab and then send it to a laboratory for analysis. Some tests require more than one sample. The benefit of home testing is you're able to collect the sample in the privacy of your home without need for a pelvic exam or office visit. However, tests done on samples you collect yourself may have a higher rate of false-positive results, meaning the test indicates you have an STI that you really don't have.