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Volume 45 (1981 - 198･･･
- Issue 4 Pages 213-
- Issue 3 Pages 157-
- Issue 2 Pages 3-
- Issue 1 Pages 3-
Volume 45, Issue 2
Displaying 1-5 of 5 articles from this issue
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Hideshige TAKAHARA1981 Volume 45 Issue 2 Pages 3-11
Published: October 15, 1981
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSBuffer effect of trees on blast pressure which is due to the energy consumption to blow down trees and spatial deminution was given by following formula.
Formula to determine the speed pressure Ps(kg/m2) resulting from explosion
Ps=6×104(3√WTNT/R)1·15...(1)
WTNT (kg): explosion converted into TNT
R(m): distance from the center of explosion
Formura to determine the buffer effect of trees on blast pressure
Pn=(Pn-1-b){P+(n-2)α}1·15/{R+(n-1)α}1·15...(2)
The formula gives the answer if n=2, 3, 4, ...then, it comes to P1=6×104(3√W/R) 1·15
W: explosives converted into TNT
b: energy to blow down a tree (2, 403kg/m2)
a: distance between trees
R: distance from the center of explosion to the front edge of trees
Pn: blast pressure on n tree (n=1, 2, 3, ...)View full abstractDownload PDF (1003K) -
Tetsuo TANAKA, Makoto MOTONAKA1981 Volume 45 Issue 2 Pages 12-18
Published: October 15, 1981
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThis study is concerning to the restoration and value analysis of the cultural properties, remained in Yamatokoriyama; the castle town under the feudal ages in Nara prefecture. Particularly, the moats and mounds which have been the great flames of the castle town have been gradually extinguished on account of the recent urbanization. This report should, therefore, be the primary guidline for the conservation and activation planning of those cultural propef ties.
This report consists of three parts. The first part provides the present situation of the moats. The restoration method of the moats, and also the specific character of the water system are provided in the second part.
The final part refers the valuation of the moats, ditches, and mounds for the latter planning.
The remarkable points in this report are as follows.
1) The inner moats around the castle and the northern and eastern moats of the town are remained. But the southern, and western moats of the town are extinguished on account of recent urbanization. The few parts of the mounds are remained.
2) The selection of the land classification “pond” in the land book is the effective method except excavation for the restoration.
3) The whole water system which was laid under the feudal ages still function effectively for the agricultural water supply. This great factor which remained the moats and ditches should be the considerable point for the planning of conserving them.
4) The mounds are remained in the precincts of the temples and shrines, and also covered with green. These areas should, therefore, be conservated synthetically.View full abstractDownload PDF (1282K) -
Saburo KIMURA1981 Volume 45 Issue 2 Pages 19-21
Published: October 15, 1981
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThe purpose of this study is to clarify the meaning of the terms “EN”(Landscape) and “SONO”(Garden), which represent Japanese landscape architecture. The following is studied by inspecting historical literatures.
1)“EN” has been being used from much older than “SONO”, whereas the former is little used in these days.
2)“EN” is originally concerned to natural wide landscape where human work is little added.
3)“SONO” has begun to be used since the certain formation of the dwellings, in relation to somewhat artificial closed “open space” around it.View full abstractDownload PDF (452K) -
Takehiko KATSUNO1981 Volume 45 Issue 2 Pages 22-27
Published: October 15, 1981
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSDownload PDF (3530K) -
Shiro SUEMATSU1981 Volume 45 Issue 2 Pages 28-37
Published: October 15, 1981
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSDownload PDF (844K)
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