▁of ▁the ▁fluid ' s ▁integrated ▁kin etic ▁energy ; ▁it ▁may ▁be ▁either ▁positive ▁or ▁negative . ▁The ▁equations ▁of ▁motion ▁simply ▁reflect ▁the ▁dr ift ▁of ▁each ▁vor tex ' s ▁position ▁in ▁the ▁velocity ▁field ▁of ▁the ▁other ▁v ort ices . ▁ ▁In ▁the ▁gu iding - center ▁pl asma ▁interpretation , ▁the ▁particles ▁represent ▁long ▁fil aments ▁of ▁charge ▁parallel ▁to ▁some ▁external ▁magnetic ▁field . ▁The ▁constant ▁ki ▁is ▁the ▁linear ▁charge ▁density ▁of ▁the ▁it h ▁fil ament . ▁The ▁Hamiltonian ▁H ▁is ▁just ▁the ▁two - dimensional ▁C oul omb ▁potential ▁between ▁lines . ▁The ▁equations ▁of ▁motion ▁reflect ▁the ▁gu iding ▁center ▁dr ift ▁of ▁the ▁charge ▁fil aments , ▁hence ▁the ▁name . ▁ ▁See ▁also ▁List ▁of ▁pl asma ▁( physics ) ▁articles ▁ ▁Notes ▁ ▁References ▁ ▁Category : T ur bul ence ▁models ▁Category : Pl asma ▁physics <0x0A> </s> ▁Las ios pha er iella ▁is ▁a ▁genus ▁of ▁fung i ▁in ▁the ▁S ord ari om yc etes ▁class ▁( sub class ▁S ord ari om yc et idae ) ▁of ▁the ▁As com yc ota . ▁The ▁relationship ▁of ▁this ▁tax on ▁to ▁other ▁tax a ▁within ▁the ▁class ▁is ▁unknown ▁( inc ert ae ▁sed is ), ▁and ▁it ▁has ▁not ▁yet ▁been ▁placed ▁with ▁certain ty ▁into ▁any ▁order ▁or ▁family . ▁ ▁External ▁links ▁Index ▁F ung orum ▁ ▁References ▁ ▁Category : S ord ari om yc etes ▁gener a ▁Category : S ord