1 You have signs of infection, such as: 2  Increased pain, swelling, warmth, or redness around the bite. 3  Red streaks leading from the bite. 4  Pus draining from the bite.  A fever.
A negative index of refraction due to three-dimensional chirality is demonstrated for abilayered metamaterial based on pairs of mutually twisted planar metal patterns in parallel planes, which alsoshows negative electric and magnetic responses and exceptionally strong optical activity and circular dichro-ism.
Note that and are almost identical for both cases. Negative n in the 3D-chiral case arises from the contribution of the largechirality parameter .(a) (b) R e so n a n ce A R e so n a n ce B FIG. 4. Color online Current modes leading to a negative re-fractive index.