On Thu, Oct 16, 2014 at 10:07:28PM -0400, Judy Phan wrote: > For convexity (surface roughness), in 2-D it is a > ratio between the particle area and the total area. Is projected area the > total area? And is the surface area actually the particle area?
Projected area is the area of the particle projection onto the xy plane. Surface area is the surface area. It is estimated by triangulation[1] and it is always greater than or equal to the projected area. Of course, AFM only sees the upper surface (and even then with tip convolution). Regards, Yeti [1] http://gwyddion.net/documentation/user-guide-en/statistical-analysis.html#surface-area-calculation ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ Gwyddion-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gwyddion-users
