Tetsuya Ohya

Fundamental Study for Physiological Evaluation by Paired Comparison Test and Heart Rate Variability~Effect of Chromatic Lights on female~

The popularization of LED and the development of the control technology of the lights provide chromatic lights such as a red, blue, green. The chromatic lights are expected from the psychology and the physiological effect of color. And it is predicted that chromatic lights are innovated positively into a life space. This research is about the image of chromatic lights is examined using heart rate variability and psychological methodology, i.e., paired comparison test. We examined from the two viewpoints. 1. In the results of paired comparison test, the score of the white-ice demonstrated greater scores compared with the other. 2. In the results of heart rate variability, the mean values of HF of green demonstrated greater values compared with the other. It is thus concluded that, using physiological parameters and questionnaire, it is possible to analyze the effect of chromatic lights on living organisms.

A Fundamental Study on an Input Operation of the Communication Aids by Eyeblink Using Image Analysis Methods - Change of the Feature of an Eyeblink Waveforms Resulting from Attributed to Conscious Actions Accompanying Voluntary Eyeblink -

The input devices for the operation of communication aids and the switches that enable multiple value input are required for disabled at the terminal stage of Amyotrophic Lateral Sclerosis (ALS). We considered the utilization of eyeblink that is relatively less associated with ALS at the terminal stage for the switches. It is known that eyeblink waveforms are different in between voluntary eyeblink and spontaneous eyeblink. Eyeblink waveforms are one-dimensional waveforms obtained by sampling palpebral fissure widths of eye blinking at a constant time interval and by plotting them on a temporal axis. The purpose of this study is to investigate the possibility of categorizing eyeblink data into multiple spaces. We focused on the variations in the shape of eyeblink waveforms attributed to conscious actions accompanying voluntary eyeblink. There was a significant difference in shape feature parameters obtained from eyeblink waveforms between normal voluntary eyeblink and voluntary eyeblink accompanying conscious actions. The results suggest that eyeblink data could be differentiating into six values.

Study of Touch Display in Surrounding Environmental Information Acquisition System for Deaf-blind Persons

Surrounding environmental information on the approach of the person etc. is transmitted to deaf-blind person by the interpreter and caregiver. However, when the interpreter and caregiver leave the side, the deaf-blind person comes not to be able to understand surrounding environmental information and feels insecurity. It is considered that the uneasiness can be reduced by presenting the distance and direction of the others from the deaf-blind person. To reduce this uneasiness, the surrounding environmental information acquisition system is developed in the study. This system is assuming use at home, since deaf-blind person spends a lot of time at home. The system is useful to understand the distance and direction of the others when the interpreter and caregiver are away from the side of deaf-blind person. The information are the direction and the distance from deaf-blind person to the others. The system can present the horizontal directions and the three distances, less than 1m, 1m to 2m, and 2m or more. Deaf-blind person can obtain the information via vibration of solenoid built in the touch display. In this paper, the appropriate shape of display and arrangement of presentation devices in the acquisition system for surrounding environment information for use were examined.

Research of Operation Method of Accessibility Equipment for Severely Handicapped Based on Voluntary Eye Blink

Serious disabled persons with motor disabilities such as amyotrophic lateral sclerosis and progressive speech impairment necessitates the use of an assistive communication aid. However, the disabled also need accessibility equipment to use the aids. This paper describes the research of the input method for the operation of the accessibility equipment, which is used by the serious disabled. The input method is based on electro-oculo-gram (EOG) that is controlled by the disabled. EOG is a technique for recording eye movements and eye blinks through electrodes placed around the eye. If the disabled can create several patterns of EOG waveforms, multiinput method is realized using these differences. We previously reported the technique to identify voluntary eye blink appeared on the EOG. Because voluntary eye blink is simple operation, we investigate the possibilities of utilization of consecutive blinks and gaze. 1) We examined the influences of the consecutive voluntary eye blinks by changing the blink intervals. We revealed that the blinks in interval at 95% when incorporating upward gaze and forward gaze. The results suggest that the incorporation of upward gaze and forward gaze has possibilities of realization of multi-input method.