In this study, non-volatile activation of Se thin film photovoltaic device was characterized for the self-powered artificial visual synapse applications in neuromorphic systems. Short circuit current density after light soaking treatment was characterized to compare non-voltaic activation/passivation of photovoltaic performance for TiO₂/Se and ZnMgO/Se heterointerface devices. TiO₂/Se and ZnMgO/Se devices respectively decreased and increased their short circuit density with increasing light soaking time. ZnMgO/Se device also showed reversible decrease after light soaking under dark condition. The self-powered artificial synapse can be developed by using the similarity between non-volatile potentiation/depression of synapse and non-volatile activation/passivation of ZnMgO/Se photovoltaic device.

In this paper, we have proposed a pitch-converting mechanism to realize a tactile display with both spatial resolution and vibration stimulation, aiming to present fine texture to human fingertips. To optimize the design of the proposed tactile display, we proposed a theoretical model of the relationship between design parameters and vibration amplitude. Based on the results, we designed and fabricated the 7 elements pitch conversion tactile display. In the prototype display, 15 um displacement was obtained at a voltage of 25 V, and independent drives of each diaphragm were demonstrated, respectively.

The purpose of this study was to evaluate the physiological activity of bonsai using plant bioelectric potential. In the experiment, we compared the differences in plant bioelectric potential responses depending on the measurement month for twelve months and the correlation between the response and five ambient environmental factors: temperature, humidity, atmospheric pressure, carbon dioxide concentration, and illumination.

As a result, the differences in plant bioelectric potential responses and correlations with environmental factors were confirmed depending on the measurement month. These results showed that the possibility to evaluate the physiological activity of bonsai and its application to support bonsai cultivation using plant bioelectric potential.