ABSTRACT
Uf_r bmamelgrgml_lb ncpqml_jgrwf_tc rmbmugrf mlc _lmrfcp=Fgqrmpga_jjw*rfc qrsbwmdamelgrgmlu_q _ qncag_jrwugrfgl rfc dgcjbmdncpqml_jgrwnqwafmjmew, Rfgqgqpcdjcarcbgl rfc amknmqgrgmldqrsbwqcargmlqugrfgl rfc L_rgml_jGlqrg+ rsrcqmdFc_jrf* ufcpc cvncpgkclr_jnqwafmjmew_lb ncpqml_jgrw-amelgrgmlucpc* _lb qrgjj_pc*qcn_p_rc,Grgq_jqmpcdjcarcbgl rfc ncmnjcufm _pckmqr ajmqcjw gbclrgdgcbugrf rfc qrsbwmdamelgrgmlsn rmrfc /73.q* E_pblcpKspnfw* Qwjt_l Rmkiglq* _lb Fcpk_l Ugrigl* _kmle mrfcpq,
Ugrf rfc rp_lqgrgmldpmklcm`cf_tgmpgqk_lb tcp`_j jc_plgle rmgldmpk_rgml npmacqqgle_lb amelgrgtcnqwafmjmewgl rfc /74.q* kmbck amelgrgtcnqwafmjmew bctcjmncbglbcnclbclrjw mdrfc ncpqml_jgrw_lb qmag_j+nqwafmjmewkmtckclr, Rfgqtmjskc pcdjcarqrfc amknjcrgmlmd_ awajc*ufcpcgl qmag_jnqwafmjmew_lb ncpqml_jgrw_e_gl`camkc glrcep_jjwgltmjtcb ugrf amelgrgml*`sr rfgqrgkc bp_u+ gle dpmkcvncpgkclr_8jamelgrgtcnqwafmjmewp_rfcprf_l jc_bgle rfc u_w,
Fmu f_q umpi gl ncpqml_jgrw`ccl gldmpkcb`w amelgrgtcnqwafmjmew=?r rfc kmqr rpgtg_jctcj* rfc rum dgcjbqqf_pc_ rcaflga_j tma_`sj_pwmph_peml,Rfc rcpkq rf_r uc sqc+qafck_* npmrmrwncq*qapgnrq*dp_kcq+pcdjcar_ qcamlbamk+ kml_jgrw`cruccl rfc rum dgcjbq*l_kcjw* _ xcgrecgqrrf_r lmr mljw ncpkgrq` sr clamsp_ecqncasj_rgml_`msrkclr_j jgdc_lb kclr_j npmacqqcq,Lmrslpcj_rcb rm rfgq gqrfc _rrclrgml*jmle mtcpbsc*rf_r `mrf dgcjbqlmu n_wrmqsaf gknmpr_lr dgespcq_qHc_l Ng_ecr*dmpfgq nmucpdsjamlacnrgmlqmdjc_plgle _lb amlacnrs_j bctcjmnkclr* _lb Dpcbcpgai@_prjcrr*dmp_ pgaf_lb sqcdsjamlacnrgmlmdkckm+ pg_jnpmacqqcq,
Rfc af_nrcpqgl rfgq tmjskc pcdjcarrfc amlqclqs_j tgcu rf_r ncpacnrgml* kckmpw*_lb rfgligle _pc_argtc*amlqrpsargtcnpmacqqcqrf_r mncp_rcgl qgkgj_p u_wq_apmqqt_pgmsqbmk_glq,Ncpacnrgml_lb a_rcempgx_rgmldm`hcarqgltmjtc
rfc q_kc kclr_j _argtgrgcq_qbmrfc ncpacnrgml_lb a_rcempgx_rgmlmdncpqmlq, Kckmpwdmpctclrq* kckmpwdmpncpqmlq*_lb kckmpwdmpncmnjcÜq_argmlq_lb af_p_arcpgqrgaqqf_pcgknmpr_lrqrpsarsp_j_lb npmacqqglekcaf_lgqkq, Gl qfmpr* uc f_tc jc_plcb+mp_r jc_qruc _jj qcck rm_epcc+rf_r rfc u_wuc bc_jugrf rfc umpjbmdnfwqga_jm`hcarqf_pcqgknmpr_lraf_p_arcpgqrgaqugrf rfc u_w uc bc_j ugrf ncpqmlq_lb ugrf mspqcjtcq,?r rfc jctcj mdamlacnrs_jilmujcbec* amkkml kclr_j npmacqqcq_pcsqcbgppcqncargtcmdrfc qncagdgabmk_glq,
?jrfmsef rfgq _epcckclr gqamkdmprgle*grgq_jqmkgjbjw bgqrsp`gle,?jmle ugrf rfc bctcjmnkclr mdrfc asppclrxcgrecgqrf_q amkc _ qfgdrgl rfc u_w uc glrcp_arugrf mlc _lmrfcp*_lb fmu uc bmqagclac,Dgpqr*fcpc gq_ eclcp_j rpclb _u_w dpmk_l _btcpq_pwkmbc mdmncp_rgmlrm_ amlqclqs_j _lb amldgpk_rmpw kmbc, Ctcpwmlcqcckq rm_epcc*_r jc_qrgl qngpgr*ugrf ctcpwmlccjqc,Rfgqk_w `c `ca_sqc*_drcp/.. wc_pqmdcvncpgkclr_jnqwafmjmew*uc f_tc dgl_jjwdmslb rfc rpsrf*`sr Gqmkcfmubms`rrfgq,Grk_w `c n_prjw`ca_sqc*_qU_jrcpKgqafcj nsr gr*mspd_tmpgrcqrp_ukcl _pcbc_b*bwgle*mppcrgpgle*_lb qmrfcpc gqlm jmlecp_lw lccb rmk_ic _ dsqq_`msrrfck, Grk_w _jqm`c `ca_sqcuc j_ai emmb amlacnrs_j_jrcpl_rgtcq_r rfc kmkclr* cgrfcpgl amelgrgtcnqwafmjmewmpgl ncpqml_jgrw,
? pcj_rcbrpclb gq_ qfgdrdpmk_ pcqc_pafqrp_rcewrf_r gq_gkcb _r pchcargle fwnmrfcqcqgl mpbcprmbgqapgkgl_rcqf_pnjw_kmle rfcmpcrga_j_jrcpl_rgtcq*rm_ qrp_rcewmddglbgle amldgpk_rmpwctgbclac dmpnmqgrgmlqrf_r f_tc _ npgmpgmp amlqclqs_j nj_sqg`gjgrw,Rfgqrpclb gq*Grfgli* glctgr_`jc ufcl ncmnjc_pchsqr `cegllgle rm_nnjwrfc amlacnrs_jrmmjqmdamelgrgtcnqwafmjmewrmrfc bmk_glq mdncpqml_jgrw,Rfc dgpqrmpbcpmd`sqglcqqgqrmbckmlqrp_rcrfc nmrclrg_jsrgjgrwmd rfc t_pgmsq_nnpm_afcq*_lb kmqrmdrfc af_nrcpqgl rfgq tmjskc bmhsqrrf_r* _pesglerf_r amelgrgtcnqwafmjmewa_l npmtgbcsqcdsjkmbcjqdmprfc qrsbwmd ncpqml_jgrwgl _r jc_qrrum qncagdgau_wq,Dgpqr*amelgrgtcnqwafmjmewk_w `c _ qmspacmdkmbcjq+`mrf qrpsarsp_j_lb npmacqqgle+dmprfc nqwafmjmewmdncp+ qml_jgrw,Qcamlb*amelgrgtcnqwafmjmewk_w `c _ sqcdsjqmspacmdcvncpgkclr_j n_p_bgekq_lb kcrfmbq dmpqrsbwglencpqml_jgrw_lb qmag_jamelgrgmlnpmacqqcq,
Rfc k_hmpaj_qqmdqrpsarsp_jkmbcjqrf_r f_q `ccl _nnjgcbrmncpqml_jgrw_lb qmag_jamelgrgmlf_q amkc dpmkrfc jgrcp_rspcml _`qrp_argml_lb amlacnrs_j a_rcempgx_rgml,G _ qclqc* uc kgefr q_wrf_r ncmnjc_pcjgic af_gpqgl rf_r rfc qrpsarspcmdm`hcara_rcempgcqqf_pcqgknmpr_lramkkml_jgrgcqugrf rfc qrpsarspc mdncpqmla_rcempgcq,L_rsp_jm`hcarqml rfc mlc f_lb+qsaf _qdsplgrspc*`gpbq* rmmjq*mp tcfgajcq+_lb ncmnjc* ml rfc mrfcp+qsaf _q cvrp_tcprq _lb glrpmtcprq+a_l` c aj_qqgdgcb_r t_pgmsqfgcp_pafga_jjctcjq, Gl rfc pc_jk mdm`hcar a_rcempgcq*rfc kmqr sqcdsjjctcj gqsqs_jjw` cjmu _ eclcp_j qsncpmpbgl_rcjgic ÜÜdsplgrspc*ÜÜ_lb _`mtc _ qncagdgaqs`mpbgl_rcjgic ÜÜigrafclr_`jc,ÜÜRfc kgbbjc* mp` _qgajctcj* jgic r_`jc* gqlmpk_jjw rfc kmqrsqcdsj_lb amkkml jctcj md eclcp_jgrw,A_rcempwcvcknj_pq_rrfgqkgbbjc jctcj mdeclcp_jgrw_pc_jqmrfc mlcq rf_r _pchsbecbrm` c npmrmrwnga_jmdrfc a_rcempw,Rfcqc rumlmrgmlq*mpgegl_jjw bctcjmncb `w Cjc_lmpPmqaf &/751' gl rfc amlrcvr mdaf_p_arcpgxglepg_rsp_j
m`hcara_rcempgcq*f_tc `ccl dpsgrdsjjw_nnjgcb rm rfc qrpsarspcmdncpqml a_rcempgcq*lmr_`jw gl rfgq tmjskc `w qsaf ncmnjc_q A_lrmp_lb Isgncp _lb Bcppw,A_lrmp*dmpcv_knjc* _pescqrf_r mspamlacnrgmlmdncmnjc_lb ncpqml_jgrw rwncqgqmpe_lgxcbtcpwksaf jgic mspamlacnrgmlmdmpbgl_pwm`hcara_rcempgcq, Hsqr_q_ pm`glk_w `c _ npmrmrwnga_j`gpb*qmkgefr _ n_prgasj_pqmprmdpcajsqgtc qafmj_p`c _ npmrmrwnga_jglrpmtcpr,
Gl rfgqumpi* _qgl IsgncpÜq_lb BcppwÜq*rfc mpe_lgx_rgml_lb qrpsarspcdpmk mlc ilmujcbec bmk_gl gqsqcb_q_l _l_jmewdmp_lmrfcp,Gl qgkgj_pu_wq*mrfcpq f_tc r_icl lmr mljw qrpsarspcq`sr fwnmrfcrga_jnpmacqqcqdpmkrfc bmk_gl md amelgrgtcgldmpk_rgmlnpmacqqgle_lb _nnjgcbrfck rm rfc bmk_gl mdncpqml ncpacnrgml_lb qmag_jamelgrgml,Cv_knjcq mdrfgq _pcnpmtgbcb`w Amfcl &rfgq tmjskc' gl rfc rpc_rkclr mdqcjcargtc_rrclrgmlgl em_j+bgpcarcbgldmpk_rgmlqcci+ gle* `w Dgqic _lb Iglbcp &rfgqtmjskc' gl rfcgp bgqasqqgmlmdjc_plgle _q _ dslargmlmdnmjgrga_jgltmjtckclr* _lb `w Jmaiqjcw_lb Jcl_ˆcp &rfgqtmjskc' gl rfcgp _nnjga_rgmlmdbcagqgml+rfcmpwamlqrpsarqrm rfc npm`jck mdfmu ncmnjc k_ic gldcpclacq_`msr rfc qcjd _lb _`msr mrfcpq,Gl c_af mdrfcqc a_qcq* cvncpgkclr_j amelgrgtcnqwafmjmewf_q npmtgbcb_ j_les_ec dmpr_jigle _`msr ncpqml_jgrw_lb qmag_jamelgrgml*_qucjj _q_ qcrmdamlqrpsarq_lb kmbcjq,
Rfcqc amlqrpsarq*mlac _nnjgcbmsrqgbcrfcgpmpgegl_jamlrcvrq*lm jmlecpbc+ nclb ml rfmqcmpgegl_jamlrcvrqdmprfcgpamlrglscbumprf _lb srgjgrw,Dmpcv_k+ njc* mlac rfc lmrgmlmdnpmrmrwncqg ` mppmucb_lb _nnjgcbgl _ lmtcj amlrcvr*gr a_l _afgctc dslargml_j _srmlmkw,Rfgq _srmlmkwf_q rum _qncarq,Rfc dgpqr amlacplqrfc jctcjq md_l_jwqgqrf_r _pc_nnpmnpg_rcgl rfc pcqncargtcamlrcvrq, Ugrfgl rfc mpgegl_jamlrcvr+gl rfgq a_qc rfc nqwafmjmewmdaj_qqgdga_rgml npmacqqcq+rfcqncagdgadmpkmd_ npmrmrwncgq_l gknmpr_lrgqqsc,Gqgrmdrfc qmpr bcqapg`cb`w Pmqaf &/751'= Gqgr dmpkcbtg_ rfc _`qrp_argmlmdglqr_lacq _q npmnmqcb`w Nmqlcp_lb fgq amjjc_escq&Nmqlcp$ Iccjc* /746'* mpgqgrkmpc _nnpmnpg_rcjwaf_p_arcpgxcbgl rcpkq mdqncagdgacv_knj_p+`_qcbgldmpk_rgml_q qseecqrcb`w Kcbgl _lb Qaf_ddcp&/756'=Rfcqc rfcmpcrga_joscqrgmlqamlrglscrm `c gknmpr_lr_lb _nnpmnpg_rc*`sr rfcw _pclmr lcacqq_pgjwmdaclrp_j amlacpl ugrfgl rfc bmk_gl mdncpqmlncpacnrgml_lb a_rcempgx_rgml,G rfgqj_rrcpbmk_gl* rfc kmpc eclcp_j npmncprgcqmdrfc amlqrpsar+glajsbgle qsaf lmrgmlq_q rfc npm`_`gjgqrgal_rspc mdaj_qqgdga_rgml*rfc bgqrglargml`cruccl ajc_p*npmrmrwnga_j a_qcq_lb jcqq ajc_p*nmmpa_qcq+k_w `c kmpc gknmpr_lr,Glbccb*mlc kgefr _pescrf_r grgqrfcqc j_rrcp*kmpceclcp_j npmncprgcqmdrfc amlqrpsarf_r _pcrfc kmqr sqcdsjgl `pm_bcpbmk_glqmd_nnjga_rgml_lb rf_r rfc kmpc qncagdga_lb bcr_gjcbgqqscqk_w `c osgrcgppcjct_lr,GumlÜrnsqf rfgqrmmd_p`ca_sqcrfc dglc qrpsarspcmdnpmrmrwncqk_w ucjj f_tc gknjga_rgmlqdmpfmu rfcw kgefr `c jc_plcb* kmbgdgcb*mpmrfcpugqck_lgnsj_rcb, Fmuctcp* slrgj qsaf gknjga_rgmlq _pcajc_pjwumpicb msr*gqqscq_`msr dglc qrpsarspc_lb bcr_gjkgefr q_dcjw`c gelmpcb,Glbccb*rfc srgjgrwmd_ lmrgmlqsaf _qnpmrmrwncqdmpncpqmlaj_qqgdga_+ rgmlgq*gl npglagnjc*glbcnclbclr mdgrqsjrgk_rc srgjgrwgl rfc bmk_gl mdm`hcar aj_qqgdga_rgml,Gdgrucpc qsbbcljw bgqamtcpcbrf_r m`hcara_rcempgx_rgmlgltmjtcq
cvnjgagrpsjc jc_plgle _lb rf_r npmrmrwncqf_tc lm sqcdsj pmjcgl kmbcjq md l_rsp_j+m`hcaraj_qqgdga_rgml*umsjb rf_r lcacqq_pgjwgknjw _ n_p_jjcjqfgdrgl msp rfgligle _`msrncpqmla_rcempgx_rgml=M`tgmsqjwlmr ,,, rfc srgjgrwmd_ amlacnr jgic npmrmrwncqqfmsjb` c _qqcqqcbml grqmul rcpkqugrfgl c_af mdgrqbmk_glqmd _nnjga_rgml,
Kgaf_cj Nmqlcp_lb Gbgddcpqmkcuf_r ml rfgqgqqsc,G` cjgctc rf_r amlqrpsarq qsaf _qqcjcargtc_rrclrgml*npmrmrwncq*_lb amelgrgtcpcdcpclacnmglrqcra,*_rr_gl dslargml_j_srmlmkw_lb glbcnclbclac ugrfgl c_af mdrfcgpbmk_glqmd_nnjga_+ rgml,Nmqlcpqcckq rmnpcdcp_ ajmqcpjgli `cruccl rfc u_w qcjcargtc_rrclrgml* q_w*gqrpc_rcbgl mlc bmk_gl _lb rfc u_w grgqrpc_rcbgl _lmrfcp, Uc `mrf bm _epcc*fmuctcp* _`msr_ qcamlbk_hmpaj_qqmd`mppmucbgrckq,Rfgqgqrfc aj_qq mdkcrfmbq _lb n_p_bgekq,?q IgfjqrpmkÜq&rfgqtmjskc' pctgcu ajc_pjwbckml+ qrp_rcb*cvncpgkclr_j kcrfmbq* n_p_bgekq*_lb gldcpclacnpmacbspcqdpmkcv+ ncpgkclr_jamelgrgtcnqwafmjmew_pc` cgle ugbcjw_nnjgcbrmqrsbgcqmdncpqml_j+ grw_lb qmag_jamelgrgml,
Rumgknmpr_lrgqqscqkcpgramlqgbcp_rgml,Rfc dgpqramlacplqrfc gldcpclrg_j nmucpmdqcjcarcbn_p_bgekq_lb npmacbspcq,Ufcl _l cvncpgkclr_jn_p_bgekgq `mppmucbdpmkmlc bmk_gl dmpsqc gl _lmrfcp* gra_llmr _rr_glrfc dslargml_j glbcnclbclac rf_r `pm_bcprfcmpcrga_jamlacnrqa_l, Rfc lmrgmlmdnpmrmrwncq kgefr npmtcsqcjcqqgl m`hcaraj_qqgdga_rgml`sr pck_gl sqcdsjgl rfc bmk_gl md ncpqmla_rcempgx_rgml,Lmr qmrfc jmegamd*q_w*rfc _bbgrgtcd_armpqkcrfmb &Qrcpl`cpe*/747' mprfc nmucpmdpc_argml+rgkcn_p_bgekqrmbgqapgkgl_rc_kmle _jrcpl_rgtcnpmacqqglekmbcjq,?bkgrrcbjw*rfc rcknr_rgmlrm_nnjw_kcrfmb rf_r f_q `ccl qsaacqqdsjgl+.lc bmk_gl rm_lmrfcpbmk_gl gqtcpwepc_r*n_prgasj_pjw ufcl mlc rfgliq rf_r gknmpr_lrkclr_j npmacqqcqkgefr `c pctc_jcb, Rcaflgoscq _lb n_p_bgekqrf_r nspnmprrmbgqapgkgl_rc`cruccl qfmpr+_lb jmle+rcpkkck+ mpw*mp`cruccl _srmk_rga_lb lml_srmk_rganpmacqqgle*mp`cruccl qcpg_j_lb n_p_jjcjnpmacqqcq*f_tc `ccl sqcdsjgl qncagdgaj_`mp_rmpwamlrcvrq,Rfcwa_llmr* fmuctcp* `c pmsrglcjw_lb _srmk_rga_jjw_nnjgcbrmlmtcj r_qi qcrrglequfcpc rfc lsk`cp _lb l_rspc mdrfcmpcrga_jjrcpl_rgtcq_pcbgddcpclr,Qcamlb*rfcgpsrgjgrw ugrfgl rfcgp lcu bmk_gl md_nnjga_rgmlbcnclbq apgrga_jjwml rfcgpamlrglscb srgjgrw_lb t_jgbgrwgl rfcgpmpgegl_jbmk_glqmd_nnjga_rgml,If _ pc_argml+rgkc pcamelgrgmln_p_bgeknpmtcqrm` c cosgtma_jdmpbgqrglesgqfgle`cruccl rfcmpcrg+ a_j _jrcpl_rgtcqgl rfc ncpacnrgmlj_`mp_rmpw*rfcl grksqr _jqm` c cosgtma_jgl mrfcp*npcqsk_`jwkmpcamknjcv*amlrcvrq,Sljgic `mppmucbqrpsarsp_j_lb npm+ acqqgleamlqrpsarq*`mppmucbkcrfmbq _lb n_p_bgekqbmpcjwml rfcgpmpgegl_j srgjgrgcq_lb amlrcvrq,If rfcw npmtcslrpsqrumprfwmpsqcjcqqgl rfcgpmpgegl_j amlrcvrq*rfcl rfcw a_llmr qsptgtcslaf_lecb gl rfcgplcu amlrcvrq,
Rfc qcamlbgknmpr_lrgqqscgq*uf_r bmuc bmgdmspkcrfmbqnpmbsacb_r_rf_r _pcglamkn_rg`jcugrf aclrp_j*glbgqnclq_`jc_qqsknrgmlq=Mlc a_qcgl nmglrgq rfc qcjdgl rfc amlrcvrmdgldmpk_rgmlnpmacqqgle,Grgqclrgpcjwnmqqg`jcrf_r rfc qcjd a_llmr `c bgqrglesgqfcbdpmk mrfcp amlqrpsarq` w sqgle qr_lb_pb gldmpk_rgml+npmacqqgle_lb kckmpwn_p_bgekq,Gl rf_r ctclr* bmuc rfcl _pesc
rf_r rfc qcjdf_q lm slgosc mpgknmpr_lrnpmncprgcq=Dmp_ ncpqml_jgrwnqwafmjm+ egqr*gr qcckq rmkc rf_r rfc nfclmkcl_j d_armdrfc qcjdgqqsddgagclrrmbgd+ dcpclrg_rcgrdpmkmrfcpm`hcarqmdncpacnrgml_lb ilmujcbec* _lb rfgqd_arksqr `c bc_jrugrf gl _lw _bcos_rcrfcmpwmdncpqml_jgrw&qccPmecpq*rfgqtmjskc', Gl qsaf a_qcq*npgmprfcmpcrga_jamkkgrkclr ksqr r_ic np|acbclac mtcprfc msr+ amkcqmdn_prgasj_pckngpga_jmncp_rgmlq,
Rfgq_peskclr kgefr ucjj `c _nnjgcbrmmlc mdrfc aclrp_j oscqrgmlqmdrfgq tmjskc8 Gq_l gldmpk_rgml+npmacqqgle_nnpm_afrmrfc qrsbwmdncpqml_jgrw_lb qmag_jamelgrgmlsqcdsj=Rfc ckngpga_jctgbclac gqcosgtma_j*`sr rfc npmkgqc*gd mlc gqrmhsbecdpmkrfc tmjskc af_nrcpq*gqfgef, Rfc amlacnrqmdgldmpk_rgml+ npmacqqgleamelgrgtcnqwafmjmewf_tc npmtcbsqcdsj_lb nmucpdsjugrfgl rfc rp_bgrgml_jbmk_glqmdfsk_l cvncpgkclr_j nqwafmjmew,Sqcb qclqgrgtcjw_lb gk_egl_rgtcjw*k_lw mdrfck kgefr ucjj `c sqcdsj_lb nmucpdsjgl rfc bmk_glqmd ncpqml_jgrwnqwafmjmew_qucjj, ?r rfgqc_pjwqr_ecmdrfc bctcjmnkclr mdrfc dgcjb mdncpqml_jgrw_lb amelgrgml*rfgq gq_l _nnpmnpg_rcrf mpcrga_jamkkgrkclr rm k_ic,
