$BLr?&9;$N3'MM!#(B 2003$BG/EY86;R3KA0$K$$$/$D$+JQ99$,$"$C$?$3$H$J$I$,=E$J$C$F(B $BH/Aw$,>/$7(B($B$+$J$j(B)$BCY$l$F$7$^$$$^$7$?!#(B $B$H$j$"$($:KLBgB&$N 5$/$ @ $5$$!#(B --------------------------------------------- $BEl5~ETN)Bg3XBg3X1!(B $BM}3X8&5f2J(B $BJ*M}3X @ l96(B $BAGN3;RM}O @ 8&5f<<(BD1 $B:4!9LZ(B $B?-(B shin-s @ phys.metro-u.ac.jp ---------------------------------------------