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Volume 33 (1999)
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Volume 33, Issue 2
Displaying 1-8 of 8 articles from this issue
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Toshio MURAMATSU1999 Volume 33 Issue 2 Pages 3-4
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSDownload PDF (339K) -
Akira KAMIYAMA1999 Volume 33 Issue 2 Pages 5-12
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSThese are thoughts on how to teach graphic science and what the teacher ought to take into consideration when teaching art and design. Considering how difficult it is to ring the peripheries of graphic science, it is believed that is a problem concerning university education and it can't be resolved only by an individual educator. The following are the thoughts of one educator with a clear understanding of th difficulties of the situation. Consequently this is not a technical treatise on graphic science.View full abstractDownload PDF (1407K) -
Kiichiro KAJIYAMA1999 Volume 33 Issue 2 Pages 13-19
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSThe following two factors disturbs students in their understanding a projection.
1. Students don't have mental operation to understand figure with coordinate. Even if they have knowledge of the coordinate system, they can't apply this knowledge in coordinate of a projection.
2. Knowledge of the coordinate system which students have is lacking in mathematical idea.
Students have three misconception about the coordinate system as follows.
a. Students can't understand that the coordinate axes is reference frame common to a projection.
b. Students don't use the coordinate axes to know coordinate value. They use coordinate axes as a frame to know place of figure.
c. Students don't understand that property of figure changes between different coordinate system.
These students don't represent a projection with coordinate. They use term of similar size or measurement. In their idea, these term means size of length and size of angle. Term of a measurement doesn't mean coordinate. They don't replace figure in coordinate. They can't imagine that mistake of answer is coordinate mistake. Therefore students mistake the task.View full abstractDownload PDF (1142K) -
Application to Problem Unsolvableby ConstructionHozumi KAGAWA, Hiroshi MAKI1999 Volume 33 Issue 2 Pages 21-27
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSThough still widely in use, manual instrument drawing cannot encompass any full-scale drawing of minute or occasionally microscopic machine parts in detail. Partly to solve such issues, CAD has been developed as a reasonable tool. However, even in usual CAD drawing, inconvenience can occur when we draw a line between points lying outside the monitor screen's meshes-e. g. for the present related purpose of constructing an equal square to circle and trisection of angle. This report shows a method approximate but accurate enough to detect the problems and carry out its drawing. The hardware components consist of a personal compute (CPU=200 MHz) and laser printer (600 dpi) . We use an MS-DOS Version 6.2 as an operation system (OS) in point, which is suited for such general purpose CAD software (CANDY Version 7) as is normally on the market. Here first we show a theoretical basis for the function curves generation. We also present (1) a new method for drawing lines or circles as highly magnified figures on the CRT display in a mouse-keyboard combined manual operation ; and (2) examples of approximate equal area of square to circle and of approximate triangulation which would be less accurate if depending on existing methods alternative tc the above. The extent of accuracy of the above drawing method and how to put it to practical use are leftfor further consideration.View full abstractDownload PDF (931K) -
Part 2 Some Discussions on Practical Application of the MethodMichikazu OHNISHI1999 Volume 33 Issue 2 Pages 29-36
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSIn the previous paper, the auther presented a method of finding the exact joining line to obtain a panoramic photograph with a regular camera, This paper discusses following items for easy and practical application of the method ;
(1) How to find the approximate joining line of two photographs, i, e, , the compass method, and the stereoscopic method.
(2) How to measure the unknown rotating center of a camera, i, e, , the two perpendicular lines method.View full abstractDownload PDF (4852K) -
Takahiro MIURA, Zheng XU, Kunio KONDO1999 Volume 33 Issue 2 Pages 37-44
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSRecursive subdivision methods are widely used in Computer Aided Geometric Design (CAGD) for generating smooth surfaces from arbitrary topological meshes. A big problem is, however, the more subdivision process is applied, the more meshesgenerated and the drawing cost becomes large. For solving this problem, in thispaper, we extend Doo and Sabin's subdivision algorithm to control the increase of the number of meshes generated in subdivision process. The new method can generate shapes using fewer meshes than Doo-Sabin's process does.View full abstractDownload PDF (1300K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1999 Volume 33 Issue 2 Pages 45-50
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSDownload PDF (1869K) -
1999 Volume 33 Issue 2 Pages 51-60
Published: 1999
Released on J-STAGE: August 25, 2010
JOURNAL FREE ACCESSDownload PDF (1567K)
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