Fundamental dissertation on the curvature of footpath (2)

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  • 園路の曲率に関する基礎的研究 (2)
  • 園路の曲率に関する基礎的研究-2-特に歩行時の軌跡・スラローム形について
  • エンロ ノ キョクリツ ニ カンスル キソテキ ケンキュウ 2 トクニ ホコウジ ノ キセキ スラロームケイ ニ ツイテ
  • relative chiefly to itshuman pattern “slalom”
  • 特に歩行時の軌跡・スラローム形について

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This dissertation is one of the human scales about the curvature of footpath connected with the previous report.(2) In this paper, we try to clear the pattern of footpath relating to human scales. Here we have various examples of footmarks which were surveyed at a seashore as in Fig. 1-5. From these materials, we have the following conclusions after the investigation on the so-called “slalom” maintained by P. J. GRILLO (1960).(1)<BR>1. As is analogized from Fig. 6-7 in which 53 out of 93 examples can be superposed one upon another, human motion in walking is similar to the pattern of wave-motion repeating a directional change periodically. In order to define its standard form, each of wave-length, amplitude, and etc. is measured and treated statistically.<BR>Estimated results: with 99% confidence level, <BR>1/2 wave-length=23.96±1.19≅24m.<BR>amplitude=4.24±0.24≅4m.<BR>By the aid of above-mentioned numerical values, a standard pattern of human motion in walking pace is shown in Fig. 8 which is modified for the reason that they are induced from samples left on the sands giving us some difficulty in controlling our legs. And this pattern approximately satisfies the previous proposed equation;<BR>namely, 39-δ=13.5Log.(R-5.8).<BR>In this case, the angle of changing direction (δ) is 18°54' and its radius of curvature (R) is 37m.<BR>2. Checking the remaining 40 examples, we can find out many samples whose pattern are nearly rectilinear in spite of irregularity, with these concrete cases, it shall be assumed that man has always an intention of walking straight so long as he does not turn consciously. On the other hand, in the supplemental experiments of blindfold subjects ordered to go straight on, it was observed that every one was inclined to walk along with a certain curvature.<BR>From these facts described above, we may conclude that “slalom” are produced as the result of the interaction of two potential factors, that is, the directional-intention and the bodily-inclination.

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