Kazuyuki Fujita

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—In this paper, we investigate the effectiveness of the records of user's activities in Twitter, which is a popular social media, for estimating user's depressive tendency. We construct multiple regression model to estimate user's depressive tendency from the frequencies of words used by the user. We perform experiments to estimate participants' depressive(More)
We propose a room-shaped information environment called Ambient Suite that enhances communication among multiple participants. In Ambient Suite, the room itself works as both sensors to estimate the conversation states of participants and displays to present information to stimulate conversation. Such nonverbal cues as utterances, positions, and gestures(More)
This paper proposes a novel and efficient multi-focus scroll interface that consists of a two-step operation using a con-tents distortion technique. The displayed content can be handled just like an elastic material that can be shrunk and stretched by a user's fingers. In the first operation, the us-er's dragging temporarily shows the results of the(More)
The authors propose a novel book-shaped device for flipbooks called Paranga that embodies both physical features of paper and e-book interactivity. Paranga detects how quickly a user is riffling and provides the user with visual, tactile, and auditory feedbacks of turned pages by employing an LCD monitor and a rotatable roller mechanism with pieces of real(More)