THESIS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ...


 


      
  
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JLK.MON PRQTSU0VWMXJMYSZ\[]N ^

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jgutr~gq_hb)c4Wc jl‚lc blefefr~gq‚
0jl…R†z d m6jw„q_hu~z4blg„ `` u~r~sab)d rxjgz pqc{r~z d jT_acc{jeH}wr         

 s pqc{r~z d jT_acc{jeH}wrTˆR‹)ŒlŒ jd jlc{z b }pRblg„u~r~g‚b)c4}r~„&4pblu~eC_ac{zd _wgr~z*bCpjl ‚zlju~b 0z _ac{rx_gc ‹ll   Œ  ! " _a` b)c d eC_hg‡djlkWm&b)d pq_heIb)d r~sabluvwsar~_hgsy_hz r~}r~z{rxjgjlkmob)d pq_hefb)d r~saz pblu~eC_ac z|grx}l_ac z rxd€jlk _hs pgqjuxjl‚l6blg„&|gr~}l_ac{z rxd Ijlkjld pq_hg‡…R†qc ‚ w# $%h‹f  &  jl d _a…‰jlc ‚ Š _h„_hg _hux_a` pqjgq( _ ') +* Œ ,- &). ‹ aŒlŒlŒ

Wc{r~g‡d _h„ƒb)dd pq__a`Rb)c{d eC_hgidjlkWm&b)d pq_heIb)d r~sabluvwsar~_hgsy_hz  jl d _a…‰jlc ‚qˆTŠ_h„q_hg&‹)ŒlŒ &


 


 
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! JLK.MON PRQTSU0VWMXJMYSZ\[]N ^ _a`Rb)c d ef_hgidjlknmob)d pq_hefb)d rtsabluvwsarx_hgRsy_hz pbluteC_ac{z4|grx}l_ac{z r~d€jlkv _hs{pgjuxjl‚l blg„&|gr~}l_ac{z rxd  jlkWjld pq_hg‡…R†qc ‚

2346587:9 jlcd pq_hef_fjlkd pr~z d pq_hz{r~zr~z gqjgRu~r~gq_hb)c `c{jl‚lc{blefefr~g‚Šrxd p blgB_he  `Rpblz r~zjg b)``Ru~rtsab)d rxjgz blg„ c{jl…R†z deCjw„q_hu~zA@Ipq_fd p_hz r~zpblzHd€Šj&`Rb)c{d z6@ p_ B c{z dd pqc _a_`Rb)`‰_ac{zsyjeC`c{rtz _d pq_ B c{z d`Rb)c d6@W
_ac _lˆqŠ_„Rr~z sa†z z c jl…R†Rz d gq_hz z`c jl`% _ac d rx_hzjlkHjl`d rtefbluz ju~†qd rxjgRz d j b })b)c{rx_ad jlk]efj„q_hut6z @ pq_ B c{z d d Š j ` b)`T_ac z syjgsy_ac{g jl`d r~eIDr Chb)d rxjg eCjw„q_hu~) z gj Š g blz]d jws{pRblz d r~sCm&b)d p_hefb)d r~sabluWc jl‚lc{blefz Š rxd pƒF E†r~utrx…c{r~†Re jgz d c{blr~g‡d z * qmo ,G@Rpq_hz _Hb)c _Hz d jws{pRblz d r~sjl`Rd r~efDr Chb)d rxjg `c jl…Rux_heIzOd pb)dnpb }l_4d€Šju~_a}l_hu~zvjl'k H „q_hsar~z{rxjgJz ILK buxj Š _ac €ux_a}l_huwjgq_blg„.blg †``‰_ac  ux_a}l_huTjgq=_ @pq_ uxj Š _ac €ux_a}l_hu‰`c jl…Ru~_he rtzrtg d p_k jlc{eXjlkvb]})b)c{r~b)d r~jgblu‰r~gqA_ E†blu~rxd lˆ blg„Id p_†q`R`T_ac €ux_a}l_hujlL… > _hsyd rx}l_k †gsyd rxjgr~z _hrxd pq_acd pq_N_ Mw`‰_hsyd _h„0}*blut†q_ jlk blgjl…  > _hsyd rx}l_ jlc4d p_jg„rxd rxjgRbl _hsyd r~}l_&N_ Mwd _hgz rxjgzIjlk d pq_ qmoXk c{bleC_aŠjlc /@ pq_&z d b)…Rrtu~rxd€ jlkjl`d r~efblu z ju~†qd rxjgRz „†q_Cd j&s pblgq‚l_hzHrtg d pq_I†gR„q_ac{uxwr~gq‚ `c jl…Rb)…Rrtu~rxd€o„r~z d c{r~…R†qd rxjg r~zblgb ux Ca_h0„ @PQ _Cblu~z jI`c _hz _hgidd€Šjb)`` u~r~sab)d rxjgzd jl‚l_ad pq_acŠ rxd p&g†eC_ac r~sabluON_ MqbleC`Rux_hAz K g‡d _hgz rxd .m&jw„†u~b)d _h„  bl„r~b)d r~jgfpq_ac{b)`.  *  mo ,nblg„Id c{#b SIsg_ad€Šjlc f„q_hz rx‚0g @ g.d p_4d prxc{„ `Rb)`‰_achˆlŠ_syjgz r~„_acWb gqjgu~r~g_hb)cv`Rc jl‚lc{ble Š r~d p e †uxd r~`Rux_jlL… > _hs  d rx}l_hz4Š prts{p6b)c _]z †qL… > _hsyd _h„ƒd jI†gRsy_ac d blr~g‡d€ƒr~g0d pq_})b)c{r~b)… ux_hz4blg„6r~g6d pq_ `Rb)c{ble  _ad _ac{6z @
_ac _HŠ_ „jIgqjld†Rz _]b z d js pblz d r~s]`c jl‚lc blefefr~gq‚fb)`R`c jbls{pOˆ …R†d r~gz d _hbl„ Š _Šr~z p.d j]blgRblux Ca_ c jl…R†z d g_hz zWblzb`Tjz -d  `c jwsy_hz 6z @rx}l_hgfbH`Rb)c d r~sa†Ru~b)cW„q_hsar~z r~jg efb l_achˆŠ_H†z _pRr~zjlc pq_ac`Rc _ak _ac{_hgsy_hz4d jIblz z _hz zd pq_Hc jl…R†z d g_hz zjlk jl`Rd r~efbluOz j  u~†qd rxjgAz @ pr~z4r~z4blsasyjeC` u~r~z pq_h„0d pc j†q‚pƒd pq_]syjgz d c{†syd r~jgƒjlknbf†qd r~u~r~d€Ik †gsyd r~jg Š pr~s p0c _h„†sy_hz4d p_e]†u~d r  jlL… > _hsyd rx}l_ `c jl…Ru~_he r~gid j bCz r~gq‚ux_  jlT… > _hsyd rx}l_H`c jl…Rux_hU e @ pq_fz _hsyjgR„ `Rb)c d jlkd pq_Cd pq_hz{r~zaˆ syjlc c{_hz `‰jg„r~gq‚0d j6d p_Ck j†qc{d p `Rb)`‰_achˆ syjg  sy_ac{gz d pq_ƒ`c jl… ux_he jlkg‡†ReC_ac{r~sablu~u~ k ju~„Rr~gq‚oblgblr~c …Rb)T‚ @Q _6b)`R`c Aj Mqr~efb)d _0d pq_ r~r~r

blrxc …Rb)‚‚l_ajeC_ad c  …b E‡†Rblz r €sywu~r~g„qc r~sabluh`‰juxwpq_h„qc jgOˆhblg„ Š_z pqj Š pqj Š, c{rx‚blefr efb)d pq_hefb)d r~saz sablg …‰_C†z _h„ d j6„q_ac rx}l_ b0k ju~„rtgq‚I`Rb)d d _ac g d pb)dŠ r~u~uvsyju~u~b)`Rz _]d pq_ `Tju~pq_h„c jg @ p_blsyd †bluwk ju~„rtgq‚ `c{jl…Rux_her~z z jux}l_h„.d pqc j†q‚p d pq_k jlc{e †u~b)d rxjg]jlk b gjgu~r~gq_hb)c `c jl‚lc{bleXŠpqjz _jl`d r~efbluTz ju~†d rxjg0syjlc c _hz `‰jg„z d jCd pq_ syjjlc{„r~gb)d _hz jlkOd pq_}l_ac d r~sy_hzjlk d pq_
b)d d _hgq_h„`‰juxwpq_h„qc j0g @vp_eC_ad pqjw„r~z „_heCjgz d c{b)d _h„0jg bCsyjeC`R†qd _aceCj„_hu‰jlkvbC` blz z _hgq‚l_ac blr~c …Rb)‚T@

 7 4 jl`d r~eIDr Chb)d rxjgYˆqc jl… †z d gq_hz zhˆwe †uxd r  jlL… > _hsyd r~}l_jl`d r~efr Chb)d rxjgYˆ z d js pblz d r~sefb)d pq_heIb)d r~sabluR`Rc jl‚lc{blefz Š rxd pI_AE‡†rtu~rx…c{rt†e syjgRz d c{blr~g‡d zaˆwsyjg„rxd rxjgRblu }*blu~†_ €b)d- c{r~z Tˆq mo ˆqd c{b#SIsHgq_ad€Šjlc6„q_hz r~‚gYˆqblrxc …Rb)‚Ck ju~„r~g‚qˆ c{rx‚blefr

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_hr~g‡d ClˆWpqjeIblz]c{r~saz z jgOˆ ggRb wz d c j e6ˆm6jpbleIefbl„ z bl sarx_hs{pj Š z wr ˆ g g  c{r~d p d c j e]…T_ac{‚qHˆ kb)c{r~g&pjl c{g‡…Ru~bl„Yˆ r wu~blzc{r~saz z jgYˆR b)c{„Rr~g wb)_h„`RblgblpYˆ u~rvm6_h-z  k jlc{†Rz pYˆ r u~blz4c{r wz _hgYˆR&  jl c{blg d b)c{r~†Rz4blg„ƒ qc _h„qc r  r~g„q‚lc{_hg @

r~gblu~uxlˆn Šj†u~„,u~r l_0d j d pblg ,e] `Rb)c{_hgid zaˆeH,z r~z d _acCŠ rxd p k bleIr~uxlˆblg„ _hz `‰_hsar~blu~uxIe]0Š rxk [ _ O†u~rtb blgR„ƒeHƒ„bl†q‚p‡d _ac  eC_hu~rx_ k jlcd pq_hrxc4‚lc{_hb)dz †q`R`Tjlc{6d @ pqc{r~z d jT_acc{jeH}wr  jl d _a…Tjlc{‚qˆ †q‚†z d ‹)ŒlŒ

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