I do not have general open office hours. I generally make appointments from 10am - 4pm Mon-Fri, but for students who cannot get to campus or be online during those hours, I will make evening appointments.
During my current medical accommodation to work from home, my appointments are conducted online, usually using Google Meet for screen sharing.
I can also use Blackboard Collaborate with entire classes or individuals.
My area of research is focused on the longevity/obsolescence of print books and ebooks in academic library collections - basically, once a library acquires a book, for how many years will it likely be used by patrons?