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Volume 48, Issue 10
Displaying 1-6 of 6 articles from this issue
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[in Japanese], [in Japanese], [in Japanese]2007 Volume 48 Issue 10 Pages 638-644
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
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[in Japanese]2007 Volume 48 Issue 10 Pages 645-650
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (1372K) -
[in Japanese]2007 Volume 48 Issue 10 Pages 651-656
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
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[in Japanese]2007 Volume 48 Issue 10 Pages 657-672
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
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Masaru Oya2007 Volume 48 Issue 10 Pages 673-678
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSWashing process of solid fatty acid soil with surfactant aqueous solution was analyzed using the image data captured by CCD microscope system. Lauric acid and soduim dodecyl sulfate were used as model soil and surfactant, respectively. A small lump of fatty acid was adhered on the inner surface of glass tube and surfactant solution was flowed into the glass tube. Then the area of the interface between fatty acid soil and glass tube was observed using CCD microscope system. The image was recorded as AVI file and extracted as BMP file for analysis use. The removal process in this study can be divided into two patterns; (1) fatty acid soil is separated from the glass tube abruptly, and (2) fatty acid is removed continuously. The moving image of the latter removal pattern was captured and analyzed to clarify the removal mechanism.
The result showed that removal rate calculated from square root of the base area (=length order) varied with time in nearly direct proportion. A side image of the soil was calculated from the base area changes in order to compare with the real initial image, and relatively good similarity was obtained. Therefore the removal rate per unit soil area is expected to be constant in the removal process. This result supports the assumption that the removal mechanism of laulic acid is occurred by solubilization mechanism.View full abstractDownload PDF (3891K) -
Miori Itoh, Haruki Imaoka2007 Volume 48 Issue 10 Pages 679-690
Published: October 25, 2007
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSTo make 2D patterns of a garment, it must be noted that there are two types of parts. Some are flexible parts, for example drape in skirts, and others are stiff parts, for example collars. It is difficult to estimate the 3D form after sewing with 2D patterns in flexible parts. On the other hand, it is not so difficult to estimate that in stiff parts. Here, we focus on design of the stiff parts. We assumed that garments are made of paper, and have already predicted a continuous 3D form of a garment by using the theory of developable surfaces. Solutions were, however, usually differential equations these were not integrable. It was not general-purpose system. The aim of this paper is to make a general-purpose system for predicting the 3D form of garments after sewing. We approximate sewn curves to polygons, and seek the 3D form of garments after sewing and feasible region on the 2D patterns by using polyhedrons. At the same time, we considered the difference between the continuous system and proposed discrete system.
We made the general-purpose prototype system by using an example, regular n th pyramid. As for the differences between the continuous system and the discrete system, the following three results were obtained. (1) Users can set up a first standing angle of regular n th pyramid. (2) The larger a difference between a standing angle corresponded with continuous system and a first standing angle become, the shorter a length of generating lines are. (3) The higher the accuracy of approximation becomes, the bigger the influence that the difference between the two angles gives the length of generating line is.View full abstractDownload PDF (1074K)
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