▁also ▁carry ▁half ▁of ▁the ▁flux ▁quantum , ▁and ▁are ▁called ▁semif l ux ons . ▁It ▁has ▁been ▁shown ▁that ▁under ▁certain ▁conditions ▁a ▁propag ating ▁Joseph son ▁vor tex ▁can ▁initi ate ▁another ▁Joseph son ▁vor tex . ▁This ▁effect ▁is ▁called ▁flux ▁cl oning ▁( or ▁flux on ▁cl oning ). ▁Although ▁a ▁second ▁vor tex ▁appears , ▁this ▁does ▁not ▁viol ate ▁the ▁conservation ▁of ▁the ▁single ▁flux ▁quantum . ▁ ▁See ▁also ▁ ▁Fl ux on ▁ ▁Joseph son ▁effect ▁ ▁Joseph son ▁pen etr ation ▁depth ▁ ▁Long ▁Joseph son ▁j unction ▁ ▁Sh ape ▁waves ▁ ▁S ine - G ordon ▁equation ▁ ▁References ▁ ▁Category : Jose ph son ▁effect ▁Category : V ort ices <0x0A> </s> ▁The ▁East ▁Sea ▁Camp aign ▁was ▁a ▁naval ▁operation ▁which ▁took ▁place ▁during ▁the ▁closing ▁days ▁of ▁the ▁Vietnam ▁War ▁in ▁April ▁ 1 9 7 5 . ▁Even ▁though ▁it ▁had ▁no ▁significant ▁impact ▁on ▁the ▁final ▁outcome ▁of ▁the ▁war , ▁the ▁capture ▁of ▁certain ▁South ▁Vietnam ese - h eld ▁Spr at ly ▁Islands ▁() ▁in ▁the ▁South ▁China ▁Sea ▁( re ferred ▁to ▁by ▁the ▁Vietnam ese ▁as ▁the ▁East ▁Sea ), ▁and ▁other ▁islands ▁on ▁the ▁sout he astern ▁coast ▁of ▁Vietnam ▁by ▁the ▁Vietnam ▁People ' s ▁Navy ▁( V PN ) ▁and ▁the ▁V iet ▁Cong ▁helped ▁the ▁Social ist ▁Republic ▁of ▁Vietnam ▁assert ▁its ▁so vere ig nt y ▁over ▁the ▁various ▁groups ▁of ▁islands ▁after ▁the ▁reun ification ▁of