Methods of evaluating access to Virtual Private Networks from alternate access connections and for improving access to VPNs from alternate access connections such as ISPs. A dynamic bearing device 1 is equipped with a bearing sleeve 8 fixed to the inner periphery of the housing 7, and a rotary member rotatable relative to the bearing sleeve 8 and the housing 7, in which the rotary member is supported in the radial direction and the thrust direction in a non-contact manner by a dynamic pressure action of a lubricant fluid generated in a bearing clearance. The at least one second storage unit is configured to store a bit action length value. Hence the shorting of the chip by the bonding wires can be reliably prevented, the bonding wire having a high mechanical strength can be stably fed, the bonding pads may be optionally arranged on the chip, the degree of freedom of designing the layout of the internal circuit of the chip is high, and the semiconductor device and the wire bonding apparatus can be developed at a high efficiency.