Recently our chewing number is declined to decrease owing to softening of foodstuffs. That has influence on our health and development of brain cells, especially for children. Receiving the request of a dentist, we developed a chewing number counting equipment that can be used with the easiness like a pedometer. That equipment detects the small expansion of the temporal muscle using a head band with a semiconductor pressure sensor. After practical uses, it was clarified that it has some time for children to attach the equipment at the correct place and some people don't want to attach the head band in their meal time. In this paper, for solving the problems mentioned above, we propose a new type chewing number counting equipment that uses an infrared sensor attached at the temple of one's glasses. The proposed equipment can detect the chewing number without touching one's head and be easily adjusted by changing a sensor load resistor.
As a result, we could get the counting accuracy with 4.6% errors.

抄録全体を表示

We investigated some environmental conditions for the flower settings in six species of wild plants growing in the secondary forest dominanted of Pinus densiflola and Quercus serrata at Namegawa town, Saitama prefecture; Lilium auratum, Lysimachia clethroides, Hosta montana, Pruella valgaris var. lilacina, Eupatorium chinense, Cirsium tanakae. The environmental conditions examined were relative light intensity, moisture of soil and vegetation at the forest. Most of all the wild plants grew at bright conditions whose relative light intensities for flower settings were over 10%. Absolute light intensities for the flowers setting were over 2, 000lux. In general, all the wild plants grew in the vegetation of Pleiobalastus chino var. chino. Moisture of soil at the study site where the plants growing was between 28% and 40%, irrespective of the flower settings. Thus, moisture of soil was not important for the flower settings of those wild plants. These results suggested that the light intensity is the most inpotant factor that were examined for the flower setting among the environmental conditions.

抄録全体を表示