An “omega block” weather pattern is forecast to set up across the country this weekend, possibly bringing some May snow. Here's what it will mean for you. The Weather Channel is forecasting a ...

For several days, the weather pattern over the U.S. will become blocked and slow. That means soaking, possibly flooding rain in the South and also where rain is needed in the Northeast.

For example, a block copolymer pattern with a periodicity of 18 nm could be achieved by templating a 16 kg mol −1 PS- b -PDMS block copolymer 16 using a square post array with a periodicity of ...