著者

平尾 章成 有田 実花子 金 侖慧 松岡 由幸

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.853, pp.17-00090-17-00090, 2017 (Released:2017-09-25)

参考文献数

16

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Person has spent most of the day in a sitting posture. In recent years, there has been a growing attention to the "seating comfort" researches. However, research topics are complicated and vary widely, it is difficult for a designer to use accurately design knowledge during the development of chairs. Therefore, in this study, "seating comfort" researches based on the literatures were systematically analyzed by the elements extracted and classified into spaces of element inter-relationship diagram using Multispace design model. Extracted elements were classified and discussed about change based on timeaxis. And, also the literatures categorized using cluster analysis of the extracted elements. From consideration based on the analysis results, researches about the human mechanism of seating comfort and long-term sitting analysis including the postural change have been proposed as non-research areas for future knowledge expansion.

著者

清呉震方輯

巻号頁・発行日

vol.第29册, 1819

出版者

特種東海製紙

巻号頁・発行日

2010

著者

Ueno Keizo NAGAMATSU Tetsuro

出版者

公益社団法人日本船舶海洋工学会

雑誌

西部造船会会報 (ISSN:0389911X)

巻号頁・発行日

no.41, pp.1-18, 1971-03-31

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There have been many investigations into the effect of restricted water on wave-making resistance. In numerical calculation of the wave-making resistance, however, ship forms were represented by source distributions obtained for the unbounded water instead of those for the restricted water. In the present study the authors consider the effect of restricted water to obtain source distributions and calculate the wave-making resistance to compare with the results derived from the source distributions in unbounded water. Numerical calculations are carried out on a ship in a canal with rectangular cross section. The ship is represented by stepped distribution of sources and sinks on the centre plane. The side walls aud the bottom of the canal are replaced by infinite series of image sources and sinks. Calculations are made on the following ship form and canal sizes. Ship form Parabolic water line and frame line L/B=L/T=10 Canal size W/L=0.25, 0.5, 0.75, 1.0, 1.5, 2.0 H/L=0.25, 0.5, 0.75, 1.0 where L=ship length, B=ship breadth, T=draft, W=canal width, H=canal depth From the results of the calculations, the following conclusions are derived. (1) The source density representing the same ship form increases with the presence of canal walls and decreases with the presence of canal bottom. (2) For practical purposes, the wave-making resistance in restricted water may be calculated by using the source distribution obtained in unbounded water. (3) When the canal is wider than 3/2・L and is deeper than 3/4・L, the efect of restricted water may be neglected in practical application.

著者

京都大学大学文書館

出版者

京都大学大学文書館

巻号頁・発行日

2007-03-31

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プロジェクトの概要

著者

山口 章三郎 大柳 康 辻川 洋三郎 高橋 義男

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.23, no.250, pp.588-592, 1974-07-15

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The effects of dimensions and supporting conditions on the compressive strength and deformation of polyvinylchloride pipes under external pressure were discussed. The following four kinds of pipe supporting conditions were used; (A) compression between two steel plates, (B) compression between a steel plate and a concave wooden block, (C) compression between two concave wooden blocks, and (D) compression between two concave hard rubber supporters. The main results obtained are as follows. (1) The relation between the compressive strength P and the dimensions of PVC pipe is given by the following formula, similar to the mid load bending for a both end flxed straight beam with a rectangular section; P=(4σ_b・l・t^2)/(3・Dm)・c_1 (a) where, l, t and D_m are the length, thickness and diameter of pipe, respectively, c_1 the correction coefficient according to pipe supporting conditions, and σ_b the bending stress in kg/mm^2. The value of correction coefficient c_1 was 0.81〜1.35 for A-method, 1.35 for B-method, 8.0 for C-method and 2.3 for D-method, respectively. (2) The deflection δ under elastic deformation is given by the following formula; δ=(P・D_m^3)/(8E・l・t^3)c_2 (b) where, E is Young's modulus in kg/mm^2 of pipe material, and c_2 the correction coefficient similar to c_1. The value of c_2 was 2.22 for A-method. (3) It seems reasonable, therefore, that the theory of straight beam may be applied to the compressive strength and deflection of plastics-pipe under external pressure by using the correction coefficient c_1 or c_2.

出版者

法政大学出版局

著者

木村陸一郎 編

出版者

弘令社

巻号頁・発行日

1879

出版者

写

巻号頁・発行日

vol.[16],

著者

内藤, 若狭

出版者

写

巻号頁・発行日

vol.[318],

著者

青島 陽子

出版者

ロシア史研究会

雑誌

ロシア史研究 (ISSN:03869229)

巻号頁・発行日

vol.90, pp.43-65, 2012-06-12 (Released:2017-07-25)

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This paper attempts to elucidate how peasants after the Emancipation were treated by the government and society through analysis of the introduction process of the Narod school system during the Era of the Great Reforms. The first half of this paper indicates that the Tsarist government did not intend to create a Russian nation by fusing the peasant estate into other estates in the Russian Empire. Specifically, the Ministry of Public Instruction, which was responsible for the institutional design of Narod schools in the period of the Great Reforms, had no clear perspective on peasant education, because its focus had been on elite education such as Universities and Gymnasia since its establishment. Therefore, the initiative to construct schools in villages was left to spontaneous contribution from the peasant collectives, and the government was assumed to furnish very little financial assistance and to adopt no specific diffusion policy. On the other hand, the emerging secular pedagogues became involved in active movements for peasant education, envisaging peasants as a part of the Russian nation. Their enthusiasm was to compensate the nonresponsive attitude of the government. The second part of this paper examines such concrete activities of pedagogues.

出版者

大雁文化事業 (發行)

出版者

写

巻号頁・発行日

vol.[6],

著者

田中, 祥山

出版者

写

巻号頁・発行日

vol.[1],

著者

野溝,春子

出版者

大気環境学会

雑誌

大気環境学会年会講演要旨集

巻号頁・発行日

no.40, 1999-09-28

著者

清畢〓撰

出版者

江蘇書局刊

巻号頁・発行日

vol.[48], 1869

著者

池田 圭一 早坂 康隆

出版者

日本岩石鉱物鉱床学会

雑誌

岩鉱 (ISSN:09149783)

巻号頁・発行日

vol.89, no.12, pp.454-464, 1994-12-05 (Released:2008-03-18)

参考文献数

26

被引用文献数

6 13

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Rb-Sr isotopic age determinations were made on the basement rocks of the Northern subzone of the Maizuru Terrane in the western Maizuru City and Oe Town area. The rocks of the area consist mainly of granitic rocks with minor amounts of quartz-diorite, gabbro, diabase, and pelitic schist and amphibolite (Komori metamorphic rocks), being called the Northern Yakuno rocks. They are distinguished from the Southern Yakuno rocks which consist of ophiolitic complex (Yakuno ophiolite) lying in the Southern subzone of the terrane by their lithofacies and whole rock chemistry. The Northern Yakuno rocks are characterized by the abundance of K-feldspar rich granitic rocks, whereas the Southern Yakuno rocks do not contain such rocks. The Northern Yakuno rocks are thrust over the Shimomidani Formation of the Akiyoshi Terrane to the north in the area. The Rb-Sr mineral isochron ages were determined upon six granitic rocks and one quartzdiorite. They can be divided into two age groups, the older (around 300 Ma) and the younger (around 150 Ma). The rocks give whole rock isochron ages of 327 Ma for the older group and 149 Ma for the younger one, whose initial 87Sr/86Sr ratios are 0.70669 and 0.70779 respectively. Whole rock isochron age for the gabbros and diabases is 163 Ma, and initial 87Sr/86Sr ratio is 0.70687. Nearly coincidence between whole rock and mineral isochron ages for each age group explains the existence of two stage igneous activities at those ages in this area, despite their mylonitization and recrystallization. Both whole rock chemistry and the initial 87Sr/86Sr ratio of those rocks indicate that the Northern Yakuno rocks was evolved as an matured crust of island-arc or continent by the late Carboniferous time. In this respect, the evolutional history of the Northern subzone is quite different from that of the Southern subzone in the terrane.

著者

朝賀 泰男 西垣 英一 青井 一郎 杉浦 豪軌 槇野 浩司

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.853, pp.17-00088-17-00088, 2017 (Released:2017-09-25)

参考文献数

13

被引用文献数

1

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As manufacturing has begun to move from mass production to mass customization, manufacturing industries are currently constructing the architecture to provide wide variety of products in countries around the world. Modular design and standardization is effective for mass customization. In recent years, modular design techniques have been researched in vehicle development. Then, car manufacturers have been announcing their own architecture about the car design. We have focused on pipe-based components as the standardized member of body structure. Since the pipe is a general-purpose member, we can get them easily. In this study, we have developed new design techniques for body structure consist of the pipe-based standardized components. Firstly, we have designed base frame layout by topology optimization formulated Min-Max approach for multiple load cases. Secondly, we have calculated cross-sectional design parameters by discrete design value table and fully stressed design. Using these techniques based on modular design rules, we can obtain body structure consisting of standardized components which are subjected to stress lower than the yield strength. As a case study, we have applied our unique modular design techniques to the rear body structure model.

著者

山手 昌樹

出版者

上智大学史学会

雑誌

上智史学 (ISSN:03869075)

巻号頁・発行日

no.53, pp.157-169, 2008-11

著者

岩谷 潔 山本 晴彦

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.25, no.2, pp.155-163, 2006-08-31