background. this study evaluated the effect of two prophylaxis techniques on the marginal gap of ci v resin-modified glass-ionomer restorations. methods. standard cl v cavities were prepared on the buccal surfaces of 48 sound bovine mandibular incisors in this in vitro study. after restoration of the cavities with gc fuji ii lc resin-modified glass-ionomer, the samples were randomly assigned to...

A technique is described that produces symmetric drawings of a graph G in the plane. The method requries that G have a non-trivial automorphism group Aut(G), and that a non-trivial symmetry g ∈ Aut(G) has been selected in some way. The technique is found to be very effective in practice. It forms a part of the Groups & Graphs** software package. 1. Symmetric Cycles Let G be a connected undirect...

As shown in [31], one of the five isomorphism types of optimal binary subspace codes of size 77 for packet length v = 6, constant dimension k = 3 and minimum subspace distance d = 4 can be constructed by first expurgating and then augmenting the corresponding lifted Gabidulin code in a fairly simple way. The method was refined in [36, 29] to yield an essentially computer-free construction of a ...