Takakibi Mishima

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SUMMARY We propose a new method to construct a four parameter family of quantum-mechanical point interactions in one dimension, which is known as all possible self-adjoint extensions of the symmetric operator T = −∆⌈C ∞ 0 (R\{0}). It is achieved in the small distance limit of equally spaced three neighboring Dirac's δ potentials. The strength for each δ is(More)
— We clarify from a general perspective, the condition for the appearance of chaotic energy spectrum in quantum pseudointegrable billiards with a point scatterer inside. I. Introduction The quantum billiard with point scatterers is a quasi-exactly solvable model which is closely related to real systems. The billiards are a natural idealization of the(More)
In this study, we fabricated piezoelectric energy harvesters composed of lead-free (K,Na)NbO 3 (KNN) thin films and compared the power generation performance with PZT-thin film energy harvesters. Both of the piezoelectric thin films were deposited on Pt/Ti/Si cantilevers by rf-sputtering. The KNN and PZT thin films had perovskite structure, and showed the(More)
  • L V Minh, F Horikiri, K Shibata, T Mishima, H Kuwano
  • 2011
In this paper, a new lead-free piezoelectric (K,Na)NbO 3 (KNN) film is presented as a promising, environment-friendly alternative to the conventional piezoelectric thin film materials like PZT, etc. with regard to applying into piezo-MEMS devices in general and micro-energy-harvesting devices in particular. The KNN films deposited by the RF magnetron(More)
Triplumaria selenicaLatteur, Tuffrau and Wespes, 1970 was redescribed from pyridinated silver carbonate-impregnated specimens. Triplumaria selenica has a slit of the vestibular opening extending posteriorly along the left side of the vestibulum. The wide C-shaped adoral polybrachykinety extends along the ventral side of the vestibular opening. The narrow(More)
— In order to give some insight into a role of small impurities on the electron motion in microscopic devices, we examine from a general viewpoint, the effect of small obstacles on a particle motion at low energy inside microscopic bounded regions. It will be shown that the obstacles disturb the electron motion only if they are weakly attractive.
The purpose of this study was to evaluate the influence of the maximum velocity of the mouth closing phase on the occlusal sound. Six subjects examined were divided into two groups (children and young adults). Occlusal sounds generated by the tooth tapping were obtained with in microelectronic condenser microphone placed on infra-orbital and external(More)
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