Table 5: User u uncertain reliability at time t.

Reliability	t1	t2	t3	t4	t5
s2(a=0.5)	0.6730	0.4606	0.4959	0.5041	0.5140
s2 (a=0.4)	0.6555	0.4392	0.4738	0.4819	0.4922
s2 (a=0.3)	0.6309	0.4102	0.4436	0.4517	0.4623
s2 (a=0.2)	0.5924	0.3674	0.3984	0.4069	0.4175
s2 (a=0.1)	0.5167	0.2924	0.3174	0.3281	0.3373