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We investigated the origin of ferromagnetism due to a vacancy on a non-magnetic ferroelectric PbTiO 3 (001) surface using first-principles spin-density-functional theory calculations, and successfully provided electronic-level insights into this phenomenon. The results demonstrate that an oxygen vacancy intrinsically induces ferromagnetism, which is remarkably enhanced and stabilized on the...
The repletion rate of guide dogs for visually handicapped persons is roughly 10% nationwide. The reasons for this low rate are the long training period and the expense for obtaining a guide dog in Japan. Motivated by these two reasons, we are developing guide-dog robots. The major objective is to develop an intelligent human–robot interface. This paper describes two novel interface algorithms and...
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