2&314 !" D $ E ! , $ &A F + : ' 'I( ! .' y)!BW./!;\*'+; (! / 0' y?J.<S!c!-;*'0LM- y) .<SL-P<D!\ y) .<S!.$+GBK+ U gM4$L $$%+`F-:* !3!10 θ θ !3!!! 7,%R8 * ,!d !"#$N*'9J3!*!3! 9!^0.JO yE L9MI$!|!\0 y, !'*Bll* )NZ!c!-;9I* 2&314 !" ( $$%V3_*/ 2,H<S! *GMa!'!!<QZ3!WO f E VPz. @)]4B y,!.NO 28‹O3! !"uE e0v 2ŠO.<=!<S!3!;Š‡%E e y)<S!*!]! !"*R9G0GIG #3!#Z9NO ‡ … y y y ## y G … G G G ## O<S!V!/!G<S!PB0GG #3!#Z *.L9!BWB^9O y$|O!3!H]! !"H‚I05n !@0l<\ y$!+O#3!0L9B0';9Il*G 9fl*;9IB D[$3M^0- )<S!*B!d 0A/9I-*O $$%a )&*+V U; 9I P <D! ; ./ M 4 Z o ; # $ 3! <Q!5 $ o#1#4 `!G'P\o.I`! .N`! $$%EA/ 7,-,-,%08X * `! ↑o.I8‹↑.N↑o.I↑<!↑/!\0 M↑G #IS0\’ ↑<S!f0u…v\o.I↓ * ,V!S0$^9O`!`!Z 7,-,-,-@_^ C↑' " A 85↑o .I Z \0 ’ ↑ <S!f0u…v↑)<!`!0'B\.N#C `!`!H0Pu=#`!v ,-./ O 2&314 !" 7 `!O<S!*MI$!!P)<! *\B#↑o.I↑<!W./=*'`! $$%5 :FNFG 7,-,-,%J N δ !N δ↑uγ↓v0#N85↑.N↑Gl##δ↑#P `!PYBL-=B↓ * ,f'!^9O δ ‡ u 7 ÷% 7 v 9 .V #3! .!#J δ‡u%÷v 7 U`!*'0 \=*'P 7,-,-,4J N(L ϕ ϕ↑P"!!PZ↓Z<!l #ϕ↑ <q ↓ M ↓ !N h !P9#1IdPO ϕ↑→↑ 7,-^6P[+N ϕ //';/ 7,-,-,1@!L)t*+Q*X*+ {↑G’↑o.Iθ 7 ↓ 7,-,-,4B *M_ <\!Y=!/↑ <':-5.Y!<Q]!3!W'!*O θ 7 ‡U θ 5 GC 9 ‹ θ U θ Oa!*-0A/GI θ O*-MJYd!@3!*-#\./ D[ h9- $$%= *,(>:9,b(L3,bD ,!d #$*!@0lGl <\MY+G9.V$!!N./ *‡7Ge ‡ 7 77 7 7 7 7 ° 7 ° 40° 7 ° 30° (7 ° %7 ° 7 ‡e0 ϕ γ=15° 2&314 !" 4 … 4 … º … * * β α γ β α … β uv uMv uv uv ρ 7,13I)9*+ ,zf.# GZ^!3!GO 6MY+fW*O y:+fl*u*vOpP9# _9M1~7GG! 3!!+ y:+fl<\OpP9#!3!|•7GG# 7 l<\\= 7 0Z* y:+Pl<\l*OpP9#!3!@!o #1G!3!^|uP#<Q!S0B<!jv ,!$!B+fl*$!+;9Ig .^G!<Q]!Y*-*uZMY+fl* vBK+*O!"./+010"`BK + yUnkO!3!!<Qd9.YBK+#O ,BK+3!!uF PMP./MN!./Z5!3! v $$% A' , ,b C'+f! .$ * E .$ ‰O J ( 86 8$ !#G MY + 7 ^0 ; 9I * Ma! ^03I # ./ MN! `! += * E .$ ‰‰O ^6 )9$*'+V.Y * E .$‰‰‰O Ι ‰‰ * * uv u0nv • 4 7,-A+<)9*+ ˆ ‰‰‰ 2&314 !" :+#-G#.$./+O*G*↑G 7 G0*^↑→*'+ 5P9>GII0AN!^ !" ,Y*-*u-!.$‰‰v.<S"K+ $$%cZ+, *.L9515.Y.<S./+ZS0.J.f #!N0<=!00*O 7,1,1,%Vy/8u,<Q!S0v +.I.J4u.$./+ * vBMl!3!5^ I*! !#!3!10GL#!3!!!uN*'<Sv n.N.GBK9.=!PGmZS0\A!A .=!P I*! v,BKI*! Mv,BK'.K9 7,7z<M)9*+gVy 7,1,1,-Vy(6<yc,^(g>*>$Ou,<Q!S0Mv +'89`! 3!d9*!'#I .I! .$‰‰‰'#I9 .V ./!/ .$ ,BK9g5 .YG5!IMYc!#G0W$0 7,1,1,1Vy<)9LR U`W./+ * !<Q5.YV",G`W, 5.Y Tm T ‡IuI!3!vG*I.f. ,BK9ZS0\*P5^\GA!AZ5#Z<\ h!<9B_#iG./+010 * j 7,1,1,4Vy!{' 2&314 !" ,BK9]!!3!#0./MN!I#3! .$9B_.f.GBK9.+j!<Q*TA!0P SM = 9 " > E %, 3K/0/X;m#<NV*+, ()9*+Q+<)9*+Y +<)9*+gVyY . ,BK9g 5 .YG 5 !IMYc!#G0W$0 7,1,1,1Vy<)9LR U`W./+ * !<Q 5 .YV",G`W,. !<Q 5 .YV",G`W, 5 .Y Tm T ‡IuI!3!vG*I.f. ,BK9ZS0*P 5 ^GA!AZ 5 #Z<