Abstract. For each k ≥ 1 and corresponding hexagonal number h(k) = 3k(k + 1)+ 1, we introduce m(k) = max{(k − 1)!/2, 1} packings of h(k) equal disks inside a circle which we call the curved hexagonal packings. The curved hexagonal packing of 7 disks (k = 1, m(1) = 1) is well known and one of the 19 disks (k = 2, m(2) = 1) has been previously conjectured to be optimal. New curved hexagonal packi...

In this paper, Hexagonal Split Ring Resonator (HSRR) and Square Split Ring Resonator (SSRR) are designed using HFSS simulation software. Both split ring resonators are based on the Metamaterial and same parameters. Then after compare the simulation result of HSRR and SSRR. HFSS simulation of the Hexagonal SRR shows improved Return Loss and VSWR i.e. -44.7 dB and 1 respectively compare to Square...

High-resolution and analytical electron microscopy techniques are used to characterize Ge-implanted hexagonal SiC. After annealing the implanted samples at 1200 degrees C, Ge is found to be located preferentially on interstitial sites. After annealing at 1600 degrees C, small nanocrystals of strained cubic and hexagonal (or faulted cubic) Ge and Ge Si form. Occasionally, hexagonal (or faulted c...