m koga@tamacc.chuo u.ac.jp 2011.01.27 1
2
2010.0723 3
1980 4
J. 1999/2007 5
J.1999/2007 6
Room,G.1995 7
2009 8
= 2009 9
= 2009 10
. 11
http://www.seisyounenchian.metro.tokyo.jp/seisyounen/14_09pdf.html#01 12
72% 81% 56% 49% 13
53 3 10 1 45% 29% 16% 12% 14
56% 33% 28% 15
51% 39% 25% 16
600 400 30% 46% 17
18
19
20
21
22
23
24
25
2005 26
2004 2008 2010 27
28
29
A 55 B (31 2005 3 2006 9 2007 9 11 35 (20 23 (11 30 (10 30
31
M A 1 15 Mixi 32
2 M 5 33
M M 34
2 35
36
X [ ::: X :: :: X :: X X ::: X : : X [ X ::: X 37
1 2 38
A 1 39
H 40
C 41
42
2006 117 43
2 44
2 45
46
47
2009 60 48
(1998 49
50
2 51
3 52
53
54
55
56
57
2 T 58
59
1 60
2 61
62