In this paper, an education system for elementary and junior high school students to design analog LSI is proposed, and an analog LSI design course conducted using the education system is reported. In the proposed course, a CMOS OP-amp is designed by connecting prepared circuit blocks. The designed CMOS OP-amp is fabricated by phenitec 0.6 µm CMOS process, and connected to an external circuit for using as an audio amplifier. The students will understand the characteristics of the circuit based on the difference in sound. The students can design, simulate and layout CMOS operational amplifier in three hours, and evaluate the circuit in 30 minutes.

In recent years, with the development of IoT, research and development of wireless sensor networks for monitoring has been advanced to monitor the condition of various devices in railway vehicles and notify train crews. In the operation of railway vehicles, the composition may be changed at stations by coupling and decoupling, and it is necessary to set up inter-vehicle wireless network considering them. Therefore, to transmit sensor data in railway vehicles, we propose an autonomous configuration establishment method of wireless network for railway vehicles considering coupling and decoupling.

Because hearing is restricted to one ear, people with unilateral hearing loss have difficulty in localizing sound sources and cannot recognize the direction of hazardous sounds, resulting in a delay in danger perception. To solve this problem, we aimed to develop a device that enables the brain of a person with unilateral hearing loss to recognize the direction of a hazardous sound. We created headgear with directional microphones and actuators at four locations around the head. As a result, the sound source localization signal and the hearing of the healthy ear were re-synthesized in the brain, and the sound source localization similar to that of the two healthy ears was achieved, with no loss of vision and a small-time lag, and the direction of sound could be taught. We were able to show the possibility of creating a device that can localize sound sources as well as the two healthy ears, without loss of vision and with a small-time lag.

In this paper, we analyze a generalized version of the Allan variance, referred to as a higher-order Allan variance, that can evaluate the frequency stability of multi-dimensional atomic clocks as a function of the measurement interval. It is known that the standard Allan variance, a measure to evaluate the frequency stability of atomic clocks, has a concern that its value for third-order atomic clocks, such as hydrogen maser, is dependent not only on the sampling interval of measurement data, but also on the time of measurement. To resolve this issue, this paper introduces the higher-order Allan variance defined for the higher-order difference of clock reading deviations. The main contribution of this paper is to mathematically prove that the higher-order Allan variance depends only on the sampling interval of clock reading deviations, for which a sufficiently high order of difference is considered. Furthermore, we present numerical simulation studying the numerical stability of the higher-order Allan variance computation for time series data of clock reading deviations.

Dialog systems, providing users with quick and easy access to required information interactively, have been widely used in various fields such as airlines and online shopping sites. The formation of friendly relationships between users and dialog systems is vital for increasing the number of users, and making humor for the relationship formation is one of the effective methods. This study develops related study and proposes a method to generate misheard words and nori-tsukkomi text by considering the context.