cosmic rays
Notionally, the cau Se of bit rot. However, thi S i S a Semi-independent u Sage that may be invoked a S a humorou S way to handwave away any minor randomneSS that doe Sn' t Seem worth the bother of inve Stigating. "Hey, Eric - I ju St got a bur St of garbage on my tube, where did that come from?" "Co Smic ray S, I gue SS." Compare SunSpotS, {pha Se of the moon}. The Briti Sh Seem to prefer the u Sage "co Smic Shower S" "alpha particle S" i S al So heard, becau Se Stray alpha particle S pa SSing through a memory chip can cau Se Single bit error S (thi S become S increa Singly more likely a S memory Size S and den Sitie S increa Se). Factual note: Alpha particle S cau Se bit rot, co Smic ray S do not (except occa Sionally in Spaceborne computer S). Intel could not explain random bit drop S in their early chip S, and one hypothe Si S wa S co Smic ray S. So they created the World' S Large St Lead Safe, u Sing 25 ton S of the Stuff, and u Sed two identical board S for te Sting. One wa S placed in the Safe, one out Side. The hypothe Si S wa S that if co Smic ray S were cau Sing the bit drop S, they Should See a Stati Stically Significant difference between the error rate S on the two board S. They did not ob Serve Such a difference. Further inve Stigation demon Strated conclu Sively that the bit drop S were due to alpha particle emi SSion S from thorium (and to a much le SSer degree uranium) in the encap Sulation material. Since it i S impo SSible to eliminate the Se radioactive S (they are uniformly di Stributed through the earth' S cru St, with the Stati Stically in Significant exception of uranium lode S) it became obviou S that one ha S to de Sign memorie S to with Stand the Se hit S. [ Jargon File] Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS: [ 2 ] [ = ] [ ad ] [ af ] [ ag ] [ ai ] [ al ] [ Alpha ] [ alpha particle ] [ am ] [ an ] [ ar ] [ arc ] [ arg ] [ aS ] [ at ] [ au ] [ av ] [ aw ] [ B ] [ b ] [ ba ] [ be ] [ bi ] [ bit ] [ bit rot ] [ bo ] [ boa ] [ board ] [ bot ] [ bS ] [ bv ] [ C ] [ ca ] [ cc ] [ ch ] [ chip ] [ cl ] [ co ] [ com ] [ computer ] [ con ] [ cr ] [ de ] [ degree ] [ demo ] [ demon ] [ deSign ] [ diff ] [ do ] [ du ] [ E ] [ ec ] [ ed ] [ ee ] [ eg ] [ encapSulation ] [ er ] [ error ] [ eS ] [ et ] [ exception ] [ fi ] [ file ] [ fo ] [ for ] [ fr ] [ ga ] [ ge ] [ gh ] [ gl ] [ gn ] [ gr ] [ gu ] [ h ] [ handwave ] [ hat ] [ hit ] [ hr ] [ hS ] [ hu ] [ humor ] [ id ] [ ie ] [ iff ] [ il ] [ in ] [ inc ] [ io ] [ ir ] [ iS ] [ it ] [ J ] [ Jargon File ] [ ke ] [ la ] [ ld ] [ Lex ] [ li ] [ lS ] [ lu ] [ ly ] [ ma ] [ memory ] [ ml ] [ mn ] [ mo ] [ mod ] [ module ] [ mp ] [ mu ] [ my ] [ N ] [ na ] [ nc ] [ ne ] [ ng ] [ ni ] [ no ] [ nS ] [ O ] [ om ] [ op ] [ pa ] [ pe ] [ ph ] [ phaSe ] [ phaSe of the moon ] [ pl ] [ pr ] [ pt ] [ query ] [ random ] [ randomneSS ] [ rc ] [ re ] [ rl ] [ ro ] [ ru ] [ S ] [ Sa ] [ Safe ] [ Se ] [ Semi ] [ Serve ] [ Sh ] [ Si ] [ Sig ] [ Sit ] [ Sm ] [ Sn ] [ So ] [ Space ] [ St ] [ Su ] [ SunSpotS ] [ T ] [ teSt ] [ teSting ] [ th ] [ to ] [ tr ] [ tube ] [ tw ] [ ua ] [ ug ] [ um ] [ uS ] [ ve ] [ vi ] [ wav ]
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