A Web Community Chart for Navigating Related Communities Masashi Toyoda and Masaru Kitsuregawa Institute of Industrial Science, University of Tokyo 7-22-1 Roppongi Minato-ku, Tokyo, JAPAN +81-3-3402-6231 (ext. 2358) toyoda, [email protected] ABSTRACT ! "#$ %&'()*+, * +-+.* % / 10234657+,+8*'$ %9:-;% <()=3>?@ AB3<AC%A*)%D EEA(1 E9 F )&C@G8+,+,HE ; ; I%J '%4K0! CACAL; '%M*1 : /+,+8*N <(O< CE?I %'?P(Q +R+-+.*N &2 - N AP+,+.*&S4HT :+,+8*N! /$ %SU; -*F < (O+V'W9EI-(6&C?I %!&' *? &'0!34)XN ' CA.AA'% Y ZD%: : 9 A ?S[\3*'< > G 9 A!+,+.*&S4<T ,+-+.*N UB3I: 8*' A<(O-8] 0^)S_ .)N A`+,+8*N\_ C%[K %^ SC%A,'.W"+,+8*'%9L%'%*A'%? -?%C@!a,)bc[d3*/ > ' N A+,+8*'% S4 XNP ,IS[6=G3 e!A 3IG B '%M*LAf#$ +,E -(O. %'?g:+-+.*N!) .( +,S[ ?Ih %i[8Aj E9 S[=(Q +R *'SAG(1 A ?S48T - *; ' ; *; ME*, %HA$ &J.+-+.* %-C' %*'. ? %8( 3* i[ A %:' N AG+,+8* % (OZ&C?I %)4 \b Keywords 2% Skl`+,+8*N\k\9 AB+,+8*'% 1. INTRODUCTION Z <B %'!E%DU S < U*$ +- @*=32+-+.* %832* +H %/A %J'A (O +m 023>n%o[Ip['qr94\5s+,+8*N8%;=&-(Ic3 ?, AL3!ACEA*"HE!%AP(, E9 &) CH8+,+,2 8^- I%J" [l*s ( :?@6(U=3 3 +H[I'A"t-9?c(vuv`HC$ A S4:wF=C@S[I&' < ME*1 C<' A! N '%P39=P+-+.* %i4fx=*-?dv,8% &.A&(O.+,+8*'% S[3'*; 8# SK 9 %U3$ N=H+-+.* %i[lA BD?3+-+.*NB (O C%?I ?,(Q +y;+,+8*'%9< : 'c 9 A>+,$ +8* %i4.z8#\+,%[l-! CE?I ,(O +{(? (c=3 3)% +j 1t,9d?v(d3 3 +,S[ &.( ,?@c(v' 633% +H4TU' +-+.*N >%SU8&'B* 2 (O+|jNB(U)&C?I& &' *?: 0234YXNv SCEA;AA %I v=%, N A>?@S[@3*'-%- , 9 A>+,+8* %i4)T 1+,$ +8*N: UB3: ,*A<(O-Z+,+.*N"C %B( ] 0S_ ,9 A_ C%['U> SC%AFD;+,$ +8*Nf} D(= 9 A?@F&L;?Ca,)bU~ [I3*:% SU Z 9 AB+,+8*'% S4 5D: >J " g *"?I9[v=GA'C%IA< ME*' &)Z ,; *'3 () 8?%3)Y+,+8*'%9< Z(O + &'*S'A:(1 Aga,)bY:mB3 dA^ E40!/ A <+,+.*Nf "*%?*A7@a"bY:(1+-)$ %i[U ?Ih %i[8Am E9 %i4T > *'%B &).*'. ME*G %L%A'E (O2+,+8*'% "PC' $ *< ? <(13*%' S[1A N&As+,+.*&2 %:'&AG(O )&C?I&4 2. METHOD FOR CREATING A COMMUNITY TU:+H 2%ACHART -(c*+, EALBE?L- 9 A? %? +H[-`+,jn%r9[ /*+83IB(8a,)bYS[Z %C&?I -Sa,)bgA C; ;a,)bY:1 9 A ?S4s`+,fS>B ALa"b >g*S[) %*9 : N AP)?, B A4fXN,,3A^P )('*3Z'A/* ' % Dn rN[A.KJAZ*' % U&'; AfU 9 AG?S4 T2A&(Of+,+8*'% A JAf : 9 %' S[ =,C ?I < : N&%39=s- APa,)bA N A?A CA!3E! H%? +H4!` A " ?\A CF=?YF= 9 A-)?[Ad 1A C 1 N AG?4\T c(O <+-'c v 13 B? )A/l =I% A. F3; +,%96 (*3S4Iz)#l+-[ K( ,)?c(K=3 3&+A CK K(,?Z6 $ N A,?@S4\0^',=- D 9 A-)?? +j U(d&'U K(S[ ?UA C=&'U ?( [S3I$ * . ,(?@" -+8*'&*)%>%A23E> S[ &)"%i[=I% A 3EP +,%9"&G(D*3S4XN(g( A %C@; ( <8 N A2?S[d=,%A'1 &' <(-(O +"( f+-+.*N4/aFA. <3 C'$ &i[=;S -&)8 A\9Q=@,@@[EU'ZA! A %C@;B U*%'?. 1 N A:)?<? +H4YaF %'? &'%U) I $;$xv } );x;~ 9 [=v J'v AJ %/(6+,+8*'% 8A&'% 9 i4=0!;A$ JZ 1U+,+8*'%9.8U 6(\)?v&);D A 3EB >);x N '%i[)'AH Z9=<+,+8*'% , N A[(D;+,+83IZ()+,+8*'%9<A C,Z+,+.3 ( ' +,+8*N4 c A8 vAJ'% S[=v = 6+,+8*N8 S[ U:D?S': U%*AU+,+.*&.U'EAi[dA =%? A:A?U3IN=B 9 A:+,+8*'% S4Y5W=%?c( =A?U 6 ? .(d N&%)4d02 J #E A"?C!AL-3g'%?f`+,f > A'A"?I %'?1 *% i4YT [S=-/`+,< /AHH 8#E AA>AH4UzK%['c1*'F A' Ag3);x 9 %' "% <+,+.*N[;A A?;39=/ 9 A>+,+8*'% S4c5=%?F( A?U%v *+83I6(A %C' v3IN=,+-+.3 6(I9= +-+.* %i4YTU' AS%c(d*U+, EA" %3D*3'% A N S4 > ¡,¢¤£¥'¦,§¨ ©@§ª!ª«¦¬f©S¥'S¦ 3. xv*GAEXPERIMENTS SG :(O:#I %+, G%! %C@H(:®E =3?. 8%*AG3*'Go¯.+,%?/} °I±1U~&4 5D;KA- S[S=U* 8=+H*+H%SA-a,)b>% %*A,3@*,[ :*ME*.a,)bY (6+-)%i[\ N$ &i[l ?Ih %'S[6A! ES4.²D ,&) -A! %-D +Hd *'3 (Z%l ;+,E:a,)bY %/ : C4 xv*1+,+8*'%9G ;%'%*A'"3I*<o[³B+,+8*'% S4 z)%?*' 1oKSU 6 ( =+,+8*'%9F (I+,+.*&='&A:3-?-=? A-A'?S4\; 3S#L HB+-+.*NL -%*'A"% "(Fa,)b\S4 ²D = U ? -N3I'::3S#-%D S'A:+H$ *%4´TU'!*+.3f S'AW&^A?LA > =%?S4P02B , f]%`+,* S_Y+,+.*N>B$ &S[i%DK=+-KA'?v%" S4Y;"+,+8*N[ *AG&':]`Y+,* S_[@UA'?c , :]`+-'* S_%[lA &' =? ,;+, 8 Po4v5D *%[&' B 8+, +-+.* %>*Ag ]`+-'* S_Y'&AP3!c =%? AGA?S[E -;U /<z)%?*' :o4 5D SU/Gz)?* <o[ ;+,+8*'% , ; %<9 $ JA^Ag *%G N&A2 : >]`Y+,*'&S_'+,+8*N4 TU"]%µS(ON1_i+-+.*N-%'%*A'vbY *S[I¶- @(OS[S 4%[ AW3C* s 9 A ^ s]`Y+,* S_4 T +-)$ % < :]` 3%_+,+8*'%9" SCEA 3'%.A< J3 i4\TU',] wD%SI? *_@+,+8*'%9.U %? %-A· (O +¸ U+,+8*'% S4l5D% '*?/wD%SdU( +,*8. +-'* 1+,[I%;%:%B-(= ,N ?D?+-$ S B%®@)4µ[Zv B+,8L&'] wDS' ? *_A' %C.] 84 %S94 I4 ¹O_6U(v* %i[ +-+.*N-1U?-=?&A<A?Z 1 ,]`Y+,* S_4 0 4.;SUMMARY 2 CF @A< 1 '%M*F&, 1&'D+-+.*N =(O + *SAc(d ABa,)bYS[dAAB&'D&$ %M*! A B(8+,%i[U ?Ih S[,A N i4HT : *%, - AL(D+H2 N JAB+-+.* %=3- c&?@ %U(Y3* i[dA &C?I %/ c3INc/ 9 AB+,+8*'% S4YT 1+,$ +8*N8 K SC%A;AA vK8 1 9 A ?S[3*D F&F 9 A,+-+.* %i4dT c) KB 3=*A(OUD] 0S_ Z)N AG`+-+.* %i_ CE[U SCEAFZ'%> N&A>)?F 2;?C>a,)bc['3*- U N AG+,+8* %i4 5.nor"ºFREFERENCES C%AP±=3 @[d®G»;%3I ?I[\APudS3' Z? C4X9(O ?,023!`+,+8*'% (O +¸bY TI?4l¼69½@¾O¿'À1ÁDÂZÃ@ÄÅ=Æ@Ç@[\o°°³4 npr"Z&Cl»;*'+>S[ludS3'-Z?)&C'[lµ %A' Z¹ ?9P'A<5DAWT+,%'S4T)S& %?- 023/(OZ+- ??-3 $+,+8*'% S4d¼v9½@¾O¿'À;Á @-Ç@BÈ&¿'¿'@¾O@¿@É Ê>@É ½!Ê>¾O½@/Ê>Ë/ÌY@¿SÁ 9¿[ o°°°4 nqr"±1 B0m4Ez)9[dµ CbU& [l'A!` 4b\"±=%i4 vt-UXNA'E J G()023`Y+,+8*'% S[ ¼69½@¾O¿'À1ÁDÍ;ÎDÎÏ@Ð@Ð@Ð@[\pI4 n r"®L¶>4»;%3I ?I45D* S %C@:µ*Z%P wD %'A/6C% '+-S4\¼69½@¾Q¿ÀDÁ;@ Ñ ÌYÒGÓNÔ'È Ñ Ò¤Ô'ÃiÕ @¾OÖÕ´@¿HÎD¾Q9 Ñ É×À@¾O@Õ.[ o°°³4 nr"®·I º6!'AL¶,',Z4@wDh%'?S4Ez)A? N&AG?ZG ;0! A<0A0!34d¼v9½@¾O¿'À ÁD@-Ç@BÈ&¿'¿'@¾O@¿'iÉ Ê>@É ½!Ê>¾O½@/Ê>Ë ÌY@¿Á9¿'[Yo°@°°4
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