In order to develop remote controller designs well suited for ISDB(Integrated Services Digital Broadcasting), we performed experiments with elderly and young subjects to evaluate the usabulity and the training effects of four types of remote controller : a button type, a track ball, a touch panel and a voice recognition system. The reaction time for the track ball remote controller decreased substantially as the task proceeded, showing a clear training effect. We also conducted a post-experiment questionnaire survey among the subjects. The principal component analysis of the results shows that factors related to functionality contribute more than others such as design or uniqueness among the elderly subjects. In other words, elderly people tend to appreciate ease of operation more than eye-catching appearance or fun factors when making the evaluation.
We have been studying integrated information receiving terminals designed to convey to visually impaired persons such information as multimedia news and emergency disaster report. This paper reports on the arrangement and outline of such a terminals, the means of information transfer for text broadcasting, ISDB and emergency broadcast, and means of remote communication for persons with both visual and hearing impairment. We have also tested how accurately braille information can be recognized when information is presented by various types of stimulation for a short period of time. The results show that the perception of 6-finger simultaneous/1-finger apparent motions is the most accurate. Further, factors contributing to braille recognition errors were analyzed, and the results are reported in the paper.
It is known that the visually-induced self motion (vection) is evoked only by the visual informations, and also known that the vestibular information can affect the vection. In this paper, we investigated the effects of the tactile stimulus on the vection latency and strength when the subjects see the visual stimulus. As the results, synchronizing visual and tactile information was not enough to strengthen or acceralate the vection perception. But to give the tactile stimulus, before the visual stimulus was presented, shortened the latency significantly. However there existed the differences between subjects and there were some possibilities that the subject did not perceive the visual stimulus as the same speed.
We can perceive a little difference between colors. But we often use several color names, when we express the colors. Eleven color names ; red, blue, green, yellow, purple, orange, pink, brown, black, white and gray, have been called basic color terms. In order to express color apperance of a certain area, which color terms to use is not only determined by the spectral reflectance of the area, but also influenced by color-apperance modes that change depending on the surrounds. In this report, for the purpose of estimating how categorical color perception is processed in our vision system, we trained a neural network to perceive the color like human by the back-propagation method. After learning was complete, the network approximately categorized unknown inputs into the basic color terms like human. And the responses of three hidden units was like oppornent color response. It is shown that there is a possibility that a neural network will acquire the mechanisms as a human vision system.
The purpose this study was examine physical motions characteristics of Okinawan-dance was classed by subjective impression. The subjective impression of Kachaacii dance was estimated with principal component Analysos, and the physical motions of shoulder, elbow and wrist joint in Kachaasii was examined with multivariate autoregressive model. The time-series data of positions and angles of three joints were calculated according to the deforming conditions and shielding directions of the ring lights. The results of cumulative power contribution and impulse response showed that mutual interaction of joint rotations produced high scores in subjective evaluation.
Students with little background in mathematics and physics encounter various probiems when larning about audio and video. In contrast, the teacher faces difficulties to teach a class where such students are minguled with students with good knowledge. Reflecting on these students, an audio-visual system has been increased so that each students can study what suits his own knowledge level.