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We introduce a passive mobile robot called CPRP (Caster-type Passive Robot Porter). This robot consists of multiple casters with servo brakes and a controller. C-PRP employs passive dynamics with respect to the force applied by a human. Its appropriate motion is controlled using the servo brakes. In this paper, we derive and analyze a feasible braking force/moment that can be applied to the robot...
In this paper, we introduce a passive mobile robot with casters developed based on the concept of passive robotics. This mobile robot consists of two casters with servo brakes, one passive rigid wheel and a controller. We can manipulate the robot by controlling external force/moment applied by a human based on the control of the servo brakes attached to the casters. We consider the characteristics...
Nanometer-scale distributions of field emission current and local work function are compared on two contrasting systems. In the case of the graphene adsorbed on Pt(III) where the electronic structure is spatially perturbed, the electron emission current is higher at the sites with lower work functions. On the other hand, in the case of Ar ion-bombarded HfC thin films, the electron emission current...
A method to measure nanometer-scale distributions of field emission current is proposed where the tip-surface distance is controlled by the constant current STM operation and the emission current from the surface to the tip is measured at a sufficiently high bias voltage for a brief time under the feed back loop open. In the case of a monolayer graphite on Pt(111), where the electronic structure is...
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