Dipsadidae is the most diversified family of snakes, composed of species showing an impressive variety of color patterns. Some species are cryptic whereas others have contrasting patterns comprised by bright colors alternated with darker shades, including particular combinations of vivid colors characteristic of coral snakes (Elapidae). Species with such patterns are thought to be mimics of cor...

Abstract Pearlescence and iridescence, which are a class of light diffusion effects that exhibit sharp viewing-angle-dependent brightness colors, important material properties for notification purposes lighting devices. Here we report elastomeric materials with self-organized periodic birefringent patterns these optical effects, additional dynamic reversible tunability. A stack micron-thick lay...

Let F ={H1, . . . ,Hk} be a family of graphs. A graph G is called totally F -decomposable iffor every linear combination of the form α1e(H1) + · · · + αke(Hk) = e(G) where each αi is anonnegative integer, there is a coloring of the edges of G with α1 + · · · + αk colors such thatexactly αi color classes induce each a copy of Hi, for i = 1, . . . , k. We prove that if F i...

Let F ={H1, . . . ,Hk} be a family of graphs. A graph G with m edges is called totallyF -decomposable if for every linear combination of the form α1e(H1)+ · · ·+αke(Hk) = m whereeach αi is a nonnegative integer, there is a coloring of the edges of G with α1 + · · ·+ αk colorssuch that exactly αi color classes induce each a copy of Hi, for i = 1, . . . , k. We prove that ...

The original intention of a 3D printer is to show the design idea more concretely and vividly, but there are still some defects in actual use process, such as unable print objects sufficient volume, models with colorful colors, etc. Therefore, our team tried multi-functional integrated expand printing area enrich model colors. Project Leader: Liao Jing; participants: Ma Zheng, Qian Baohui, Yang...