50 Years of Dissipativity, Part I [From the Editor]

This issue of
IEEE Control Systems
celebrates the 50th anniversary of the two-part dissipativity article published by Jan Willems in 1972. To celebrate this event, Arjan van der Schaft assembled six articles for this issue, celebrating the first part of the dissipativity article
[1]
. Another set of seven articles will be published in the next issue to celebrate more, particularly, the second part of the dissipativity article
[2]
.