High-tech sensors help kids keep eye on aging parents SAN FRANCISCO (AP) — Each time 81-year-old Bill Dworsky or his 80-year-old wife Dorothy opens the refrigerator, closes the bathroom door or lifts the lid on a pill container, tiny sensors in their San Francisco home make notes on a digital logbook. The Silicon Valley tech executive lives just across town, but the sensors help him keep an eye on his aging parents while also raising a teenage daughter and frequently traveling for work. Advances in low-cost sensors and wireless networks are fueling a boom in the so-called "smart" home. [...] companies are looking beyond home security and temperature control to creating products for Baby Boomers trying to balance caring for aging parents and respecting their independence. Electronic tracking does raise issues around dignity and privacy, says Dr.