... Proceedings . ... The international conference The Many Faces of Centaurus A aims at bringing together a broad range of astronomers and high-energy physicists that traditionally form separate research communities. ... Ilana Feain ( chair, ATNF ) . Phil Edwards ( ATNF ) . ... Bill Harris ( McMaster University ) . ... 21/10/2008 The conference website is now online . ... 09/02/2009 Registration & abstract submission open . ... 01/10/2009 Deadline for submission of manuscripts for proceedings . ...
metrologia The leap second: its history and possible future R. A. Nelson, D. D. McCarthy , S. Malys, J. Levine, B. Guinot, H. F. Fliegel , R. L. Beard and T. R. Bartholome w Abstract. This paper reviews the theoretica l motivatio n for the leap second in the context of the historica l evolutio n of time measurement . Th e periodic insertio n of a leap second step into th e scale of Coordinate d Universal Time (UTC) necessitates frequent changes in comple x timekeepin g systems an d is currentl y th e