In memory of Gerrit van Vuren. With great sadness we wish to tell you that Gerrit van Vuren passed away on Saturday 22 September after a battle with cancer. He was 57 years old. In this too-short time he has been a wonderful source of technical and management knowledge and skill, and endless good humour, to his fellow academics, students, international co-workers and friends, and he will sadly be missed. We have also placed a condolence book in his office, Lumen C001.