In order to focus on my main tasks and duties (research, teaching and participation in the academic self-administration) and to prioritise them appropriately, I am restricting my communication per e-mail. I am regularly reading and answering mail once per working day for about one and a half hours. For the same reason, I am not participating in social networks. Related requests will remain unanswered.
Since unfortunately every now and then fraudulent phishing mails appear which were allegedly sent by me, I will from now on (Oct. 10, 2017) sign my mails with PGP. Mails without this signature are not mine, even if they pretend to be.