%PDF-1.4
%
1 0 obj
<>stream
application/pdfdoi:10.1063/1.881239
10.1063/1.881239https://doi.org/10.1063/1.881239
2008-01-11truephysicstoday.scitation.org10.1063/1.881239
physicstoday.scitation.orgtrue2008-01-1110.1063/1.881239
endstream
endobj
2 0 obj
<>
endobj
3 0 obj
<>stream
xVnF}Ẉ
ثrwݧqMB灗Ux-BqΞ9sfP-&H{w_jIT]-QYk1#T|##BKpcRX/fBx<̈Q"FĈ"o_|q*.|WJ-\ !}ϳ~r٢
rMAPuzW0+W\/.aE\Ϩ=
/A
"A2Xnc뵏s@~~TSX v9D2LWʧdvjT`M|U4-WwF#B[ʘ@)^"GcL6mY5ǯ .!pdߴ%Ŝc?&Pi&UDn|Mu3c$t&rZu:=&kUZԮ1R*1M_4/\*݉K|Sd}}r$[Wd:"Q6PM]ӸOEU4C-:u;"f?@2.^nO#!ݥR>]