Domestic abusers are using in-home technology and smart-home apps to do everything from watching their victims to stopping and starting their cars. We talk with a researcher about the intersection between intimate partner violence and digital technology. Also, WQXR music writer Fran Hoepfner joins host Robin Young to talk about the daring third symphony of Louise Farrenc — a 19th-century French composer who made her mark then but is little known now.