The sponge is rough with its irregular pits and nubs covering its surface. The brand soon became best known for its signature moccasin which feature tiny rubber nubs. Weld nuts generally have a flange with small nubs that melt to form the weld. Their drainage cores consists of nubs, columns, cuspations, or 3-D networks of stiff polymer strands. Gruff's wings are burnt off and his once-long horns are now small nubs. Seen through these clear nubs are Adidas' three stripes. Ewes also can have horns, or nubs called "scurs". NUBS start to provide formal EMBA (Executive Master of Business Administration) education in 2002. NUBS MBA program in Nanjing main campus start in 1994.