INTRODUCTION A fence was erected across the St Col Ridge of Campbell Island (Fig. 1) early in 1970, and feral sheep (Ovis aries) (Wilson and Orwin, 1964) were exterminated north of the line (Bell and Taylor, 1970). The aims of the fencing project were – 1. to assess the effects of sheep grazing on the native biota; 2. to remove the immediate threat to plant species and communities; 3. to help d...

A metasurface is an array of subwavelength units with modulated wave responses that show great potential for the control refractive/reflective properties in compact functional devices. In this work, we propose elastic consisting a line pillars gradient heights, erected on homogeneous plate. The change resonant frequencies associated height allows us to achieve transmitted phase response coverin...