著者

川上 雅之 猪木原 孝二 松原 孝 太田 正和

出版者

岡山理科大学

雑誌

岡山理科大学紀要 A 自然科学 (ISSN:02857685)

巻号頁・発行日

no.25, pp.p361-375, 1989

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The purpose of this study was analysis of physical function affected by the climb down of group climber. The subjects was 16 healthy male and female college students in 400 climbers of 18 to 21 and they were divided into two groups : Group A (take 10 minute rest during climb down), Group B (take no rest during climb down), The influence of physical function inferred to the percent of HR max (%HRmax) from heart rate during climb up, rest, mountaintop and climb down. The following results were obtained : 1) The mean of % HR max at climb down of two groups indicated of the numerical value about 60 % of HR max. 2) The % HR max of each subject during climb down was 40 % through 80 % of HR max. 3) Therefore, the most important thing during climb down for group climber continued to keep the same walking speed during climb down. Becouse the difference of physical function was affected by walk distance and the condition of natural environment. The most important thing on the walking speed during climb down was to walk at the rate of about 30 m per minute. The best condition of % HR max during climb down is throught to keep numerical value about 60 % of HR max on the work load during climb down.

著者

堂田 周治郎 逢坂 一正 立石 佳男

出版者

岡山理科大学

雑誌

岡山理科大学紀要 A 自然科学 (ISSN:02857685)

巻号頁・発行日

no.19, pp.p131-146, 1983

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The purpose of this study is to investigate the effects of the nozzle shape on the jet behaviour by means of the numerical experiment. The calculation was carried out for the three types of the fluidic devices that have different length of the nozzle throat. The flow was regarded as unsteady, three-dimensional, incompressible, viscous and laminar flow, and the primitive Navier-Stokes equations was calculated by use of predictor-corrector method. The obtained results are summerized as follows : 1. For a small aspect ratio, the jet attaches strongly when the length of the nozzle throat is shortened. On the other hand, for a large aspect ratio, it can be considered that there is no effect of the length of the nozzle throat. 2. The flow shows the symmetrical behaviour with respect to the nozzle, that is, in the upper stream, there exists a fluid flow from the midplane to the bottom bounding wall, and in the downstream, there exists a fluid flow from the bottom wall to the midplane. 3. When the length of the nozzle throat becomes shorter, the jet behaves in the similar manner to the case of higher Reynolds Number. This is closely related to the velocity distribution at the nozzle exit.

著者

坂本 尚史 妹尾 護

出版者

岡山理科大学

雑誌

岡山理科大学紀要 A 自然科学 (ISSN:02857685)

巻号頁・発行日

no.24, pp.p75-82, 1988

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Ultramafic inclusions were found in high magnesian andesite at Dogo, Matsuyama City, Ehime Prefecture, Southwest Japan. They are classified into two types, from the texture and chemical composition of minerals ; type-1 and type-2. Type-1 inclusion is harzburgite, characterized by the presence of Al-rich spinel. Type-2 inclusion is composed of dunite and harzburgite, with Cr-rich spinel. Olivine fabric patterns of the inclusions exhibit high concentration of X and Z axes, which differ from those of cumulate rocks. It seems that the textural development of the inclusions occurred through deformation process. Petrographical evidence supports this. Dislocation structure of olivine from the inclusion was examined. The dislocation density of olivines for type-2 inclusion falls into the range of 1×10^7 to 5×10^7cm^<-2> . The subgrain size of olivines from type-1 and type-2 inclusion has narrow range from 20 to 35μm. Considering the rate of stress-responce of dislocation density, subgrain size and grain size, it is concluded that type-1 inclusion deformed in nearly steady-state creep, whereas type-2 inclusion deformed in transient creep.

著者

鄭 実生 本安 竜平 萬本 義徳

出版者

岡山理科大学

雑誌

岡山理科大学紀要 A 自然科学 (ISSN:02857685)

巻号頁・発行日

no.30, pp.p103-113, 1994

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The anomaly of transverse relaxation rate of YBa_2Cu_3O_<7-δ> is mainly observed at 35K and near superconducting transition. The anomaly at 35K can not be explained by dynamical factor. It is considered that the static factor causes the anomaly and it is the change of anisotropy of indirect interaction between nuclear spins because the change of shape of decay curve accompanies with the anomaly. If the interaction between electron spin and nuclear spin obeys Mila-Rice theory even in superconducting state, it is considered that the change of the anisotropy is owing to change of electron spin correlation. As for the anomaly near superconducting transition it seems to be owing to an extraordinarily slow motion such as softening.