... authors (basic) The WikiTrails feature allows wiki authors to create "trails" through sequences of pages in the wiki. ... On that trail index page, you simply create a numbered or bulleted list of links. ... What makes a trail "work" is adding trail markup on the pages in the trail (i.e. the pages that are listed in the bullet/numbered list on the trail index page). ... TrailIndexPage]]|>> to a page, where TrailIndexPage is the page, described above, containing the bulleted list of pages in the...

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