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Volume 19, Issue 2
Displaying 1-7 of 7 articles from this issue
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Kageyu NORO1983 Volume 19 Issue 2 Pages 65-73
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
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Kazuo NODA1983 Volume 19 Issue 2 Pages 75-80
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
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Akinori KOMATSUBARA1983 Volume 19 Issue 2 Pages 81-86
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
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Shinji KURIMOTO1983 Volume 19 Issue 2 Pages 87-90
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
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Yutaka SHIMIZU, Tenji WAKE1983 Volume 19 Issue 2 Pages 91-97
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSAn apparatus which produces a moving point stimuli, was designed to examine spatio-temporal factors upon tactile letter recognition. One-stroke Hiragana letters due to a drawing procedure, were identified at the forehead.
Results showed that recognition accuracy was increased with increase of size of letter, and optimal drawing speed was about 20mm/s. An appropriate width and height of letter to achieve 85% accuracy, corresponds to six times of the point localization threshold obtained by Weinstein, in consideration with an optimum design of tactile display for a sensory substitution system.
Furthermore, it was shown that confusions of letters were explained to some extent by similarity of physical characteristics of letters, according to the hierarichal clustering analysis.View full abstractDownload PDF (2359K) -
Yoshiyuki FUKUBA, Kaoru FUJIIE, Shigeki WATANUKI1983 Volume 19 Issue 2 Pages 99-106
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe separate effects of increased O2 pressure (O2-dependent effect), and increased N2 pressure, pressure per se and gas density (non-O2-dependent effect) on cardiorespiratory function during submaximal work (600 and 900kgm/min) at 2 atmospheres absolute (2 ATA) were studied by comparing data under three different conditions, viz, with subjects (9 male, non-diver) breathing (A) air at 1.00 ATA, (B) 34.6% O2 in N2 at 1.21 ATA (same PIO2 as in C, same PIN2 as in A), and (C) air at 2.00 ATA.
At 2 ATA, pulmonary ventilation and oxygen uptake rate during work at load of 900kg/min were significantly reduced due to non-O2-dependent effect. This depression in ventilation was due mainly to the increased resistances of airway and respiratory apparatus caused by the increased gas density. To this inadequate ventilatory response, mixed expired PCO2 raised significantly. Heart rate was decreased at both work loads due to non-O2-dependent effect. The effect to the cardiorespiratory function at 2 ATA during submaximal work was ascribed to the non-O2-dependent factors.View full abstractDownload PDF (1124K) -
Kiyotoshi MATSUOKA1983 Volume 19 Issue 2 Pages 107-113
Published: April 15, 1983
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSSmooth pursuit eye movements (SP) are involuntary in the sense that SP can not be elicited volitionally if there is no moving visual stimulus. Meanwhile, if there is an object changing position, eyes can track at any speed below that of the object. When several moving objects are given with different speeds and directions, eyes can choose and track one of the objects, showing that SP are voluntarily controlled.
This paper describes a model which provides the above inconsistent characteristics of SP. The main assumption of the model is that gains of two neural units in the SP system are controlled voluntarily. This model shows good agreement with the results reported in several papers associated with voluntariness and involuntariness of SP.View full abstractDownload PDF (811K)
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