19 Facts About Ted Janssen

Ted Janssen was born on August 13,1936, in Vught, near 's-Hertogenbosch in the Netherlands.

Ted Janssen built radios, set up a chemistry lab in the attic of his parental home, was an avid bird watcher and he built his own telescopes.

Ted Janssen remembered high school as 'not very inspiring' and he passed all exams without much effort, but viewed it as a time that truly formed him.

Ted Janssen started playing the piano, harpsichord and cello in his early twenties.

Ted Janssen again showed his interest in a wide variety of topics by attending lectures in ethics, philosophy, music and sculpture.

Geert's promotor van Hove moved from Utrecht to CERN in Geneva and Geert asked Ted Janssen to keep an eye on his little sister, Loes Fast, who was studying veterinary medicine in Utrecht.

Ted Janssen quickly developed strong feelings for Loes and in 1965 they got married.

Ted Janssen was always interested in international collaboration and taught 'crystallographic groups' for 6 months in Leuven in 1969.

In 1971 Ted Janssen accepted an invite from professor Baltensberger to come to the ETH in Zurich for one year.

Back in Nijmegen Ted Janssen was promoted to associate professor in 1972 and he continued working with Aloysio Janner and Li Ching Chen on space-time symmetry of electromagnetic fields and independently on PUA representations.

In 1972 Aloysio and Ted Janssen started their long collaboration with Pim de Wolff.

In 1993 Ted Janssen was appointed as professor at Utrecht University and in 1994 he took Aloysio's position in Nijmegen after Aloysio retired.

Also in 1994 Ted Janssen organized the conference Dyproso 1994 in Lunteren.

In 1987 Ted Janssen joined the board of EMF and a few years later the IMF.

Ted Janssen was a board member of ICQ, NVK, LOTN, and the Dutch organization of Fundamental Research in Solid State Physics.

Ted Janssen spent time as visiting lector or professor in Leuven, Zurich, Dijon, Paris, Orsay, Palaiseau, Gif-sur-Yvette, Grenoble, Marseille, Nagoya, Lausanne, Beer Sheva en Sendai.

In 2014 Aloyiso and Ted Janssen received a second award, the Ewald Prize, one of the most prestigious prizes in crystallography, of the International Union of Crystallography during the IUCr conference in Montreal.

Ted Janssen died in Groesbeek, Netherlands, on September 29,2017, after a short and devastating struggle with leukemia.

Ted Janssen did however work until the last day, finishing his edits for the second edition of the book "Aperiodic structures: from modulated structures to quasicrystals" that was published in 2018.