▁opening ▁at ▁bottom , ▁rest ing ▁on ▁the ▁rub ber ▁ring ▁without ▁a ▁se al . ▁W arm ▁water ▁would ▁be ▁pou red ▁down ▁between ▁the ▁two ▁tub es , ▁se ep ▁under ▁the ▁inner ▁t ube , ▁and ▁lift ▁the ▁fat ▁into ▁the ▁latter . ▁ ▁References ▁ ▁Category : 1 8 8 4 ▁birth s ▁Category : 1 9 5 5 ▁death s ▁Category : D air y ▁educ ators ▁Category : A gr icult ural ▁research ▁Category : Pe ople ▁from ▁Jersey ▁City , ▁New ▁Jersey ▁Category : American ▁business people <0x0A> </s> ▁Nu K ernel ▁is ▁a ▁micro kernel ▁which ▁was ▁developed ▁at ▁Apple ▁Computer ▁during ▁the ▁early ▁ 1 9 9 0 s . ▁Writ ten ▁from ▁scratch ▁and ▁designed ▁using ▁concepts ▁from ▁the ▁operating ▁system ▁( OS ) ▁Mach ▁ 3 . 0 , ▁with ▁extensive ▁add itions ▁for ▁soft ▁real - time ▁sched uling ▁to ▁improve ▁multimedia ▁performance , ▁it ▁was ▁intended ▁to ▁be ▁used ▁as ▁the ▁basis ▁for ▁the ▁OS ▁Cop land . ▁Only ▁one ▁version ▁was ▁seen ▁public ly , ▁in ▁the ▁Cop land ▁alpha ▁release . ▁It ▁proved ▁to ▁be ▁very ▁un stable . ▁Development ▁ended ▁in ▁ 1 9 9 6 ▁with ▁the ▁can cellation ▁of ▁Cop land . ▁ ▁The ▁External ▁Reference ▁Spec ification ▁( ERS ) ▁for ▁Nu K ernel ▁is ▁contained ▁in ▁its ▁entire ty ▁in ▁. ▁ ▁The ▁one - time ▁technical ▁lead ▁for ▁Nu K ernel , ▁Jeff ▁Rob bin , ▁was ▁one ▁of ▁the ▁driving ▁forces