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In English vocabulary learning, continuation is an important factor; however, many learners are not good at continuing learning because they tend to prefer amusement or rest. Our proposed system is targeting learners who are eager to learn but are not able to continue learning for various reasons. We especially focused on English vocabulary learning, and(More)
We developed a telescope control system called ASTROS for the VST1 and VST2, which are specially designed radio telescopes to make a survey and have a 60-cm main dish. ASTROS is designed on the distributed intelligence concept and structurized programming. The hardware of the system is composed of several intelligent devices connected with de facto standard(More)
In this study, we propose a system to determine the placement of a smartphone using acoustic properties of the surface materials nearby. Detecting the surrounding materials allows the smartphone to change notification method automatically based on situational factors. Researchers have studied how to recognize the position in which smartphones are worn while(More)
In this study, we propose State Magic, which estimates the smartphone state using various sensors as standard equipment. Smartphone state means smartphone location such as placing it in a pocket or putting it on a desk. If a smartphone can estimate its own state, developers can create various consumer support applications, such as an application for(More)
In this study, we improved the usability of smartphones by automating a user's operations. We developed an intelligent system using machine learning techniques that periodically detects a user's context on a smartphone. We selected the Android operating system because it has the largest market share and highest flexibility of its development environment. In(More)
A 25 and 35 Gbps Absolute Pole Duty cycle division multiplexing (APDCDM) based communication system is designed successfully. A technique for estimation of BER is developed for four users APDCDM based optical communication system, referring to the data recovery rules. The performance parameters like SNR, Q-factor and BER are calculated for the transmission(More)
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