Program: EDITSET Purpose: Program to edit data in a set. ... If you want to change only one pixel, then enter this position as a box with sizes 1 in both directions. ... An example is: EXPRESSION=DATA*ABS(RA) which will multiply all values in BOX= with the absolute value of the grid in RA. ... NEWVAL= New value at: (x1,..,xn) [old value] No expression was entered at EXPRESSION= and you are prompted with NEWVAL= and the position & value of the current pixel starting at the lower left position in BOX=. ...

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