巻号一覧
8 巻 (1962)
- 3-4 号 p. 91-
- 2 号 p. 47-
- 1 号 p. 1-
8 巻, 1 号
選択された号の論文の8件中1～8を表示しています
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国土地理院1962 年 8 巻 1 号 p. 1-6
発行日: 1962/12/30
公開日: 2011/03/01
ジャーナル フリーGravity values at more than fifty stations over the volcano Hakone were measured with a North American Gravimeter. This survey aims to get necessary knowledge for carrying out detailed gravity survey throughout Japan as well as to investigate the distri bution of gravity anomalies on a volcano. Most of the stations were newly established and the elevation heights of them were determined by photogrametric method. The method of observation and reduction is similar to that used in the second order gravity survey. Relatively negative Bouguer anomaly which is lower by up to 10 milligals than the sorrounding region was found in the central part of the volcano.抄録全体を表示PDF形式でダウンロード (554K) -
後藤 賢一1962 年 8 巻 1 号 p. 7-17
発行日: 1962/12/30
公開日: 2011/07/05
ジャーナル フリーAfter further investigations with regard to the theory of usual bifilar-suspension type gravimeter, it was made clear that equation (9) must be fulfilled in order to raise its sensitivity at a stable condition. In this case, the sensitivity is given by equation (10), and it shows that on a weak spring may be suspended a heavy weight for both expansion and torsion. As the usual suspension method is not suitable for this purpose, a method named in verse Bifilar-Suspension Type" has been newly devised, its theory being almost the same as the usual one. The new method of suspension has various merits such as- there does not exist any restraint for a method of suspending weight as shown in Fig. 3 and 4, and it is easy to attach either a compensating or an adjusting spring. Creep of spring is one of the most troublesome subjects for the spring type gravimeter, and it was found that about 10 years was needed for even the best spring materials of precipitation hardening type alloy e. i. Ni-Span C, 17-7 pH stainless steel, to attain an expected creep value (0.01 m gal/day) as shown in Fig. 9. But by making the spring temporarily subject to high temperature or to strong stress, promoting creep artificially, the expected creep value was realized. The gravimeter as a trial product indicated satisfactory results concerning sensitivity and drift, but the satisfactory operation of the temperature control system still remains unsolved.抄録全体を表示PDF形式でダウンロード (3635K) -
原田 健久1962 年 8 巻 1 号 p. 18-22
発行日: 1962/12/30
公開日: 2011/03/01
ジャーナル フリーIn Japan, we use the Plane Rectangular Coordinate System, consisting of 13 systems for special geodetic works (cadastral surveying and the fourth order triangulation) on the basis of the Land Survey Law, and the coordinate system by the Universal Transverse Mercator projection (U.T.M.). They are essentially of the same kind. Both are founded on Gauss-Kruger's conformal projection. Therefore, the method of the direct transforma tion between those systems is reduced to find the formulas for the direct transformation between two Gauss-Krüger's plane coordinate systems neighbouring each other. Hristow and Hirvonen have already made researches on this problem. But, when we apply their formulas to our case, we find we need up to higher terms than they expanded. We derived, along Hristow's thinking, new formulas containning higher termes than his formulas have.抄録全体を表示PDF形式でダウンロード (480K) -
原田 健久1962 年 8 巻 1 号 p. 23-28
発行日: 1962/12/30
公開日: 2011/03/01
ジャーナル フリーIt lies principally on finding the latitude of the vertex ψm to solve the problem of finding azimuths or length of a geodesic of which quantities are entirely unlimited, giving the positions of its both ends-the second problem on the geodesic. In 1953 Bodemuller for the first time solved the problem by his own way of repeating the cyclic approximation between ψm and the longitude-difference on the auxiliary sphere. Later in 1959 Moritz thought the direct solution of ψm, however, it is felt that it implies rather complex computations. The author derived a formula connecting ψm with the vertex of the elliptic arc, which is the intersection of the surface of the spheroid with the plane determined by both ends of the geodesic and the center of the spheroid. By the aid of this formula he could obtain ψm by repeating the cyclic approximation between these two vertices. It was found that the proposed method is superior in convergency than Bodemuller's method at least for the same numerical example as he gave.抄録全体を表示PDF形式でダウンロード (599K) -
溝上 恵1962 年 8 巻 1 号 p. 29-37
発行日: 1962/12/30
公開日: 2010/09/07
ジャーナル フリーIt is the well known fact that notable relations exist between the distribution of Bouguer gravity anomalies and the structural units of the surface geology in Hokkaido, which have been formed by the orogenic movements since the Miocene period. For example, the Hidaka mountains which have been violently upheaved in the most recent geologic age, are areas of remarkably high gravity while the Tempoku-Urakawa Zone which have rapidly subsided in the same age is the area of strong negative anomalies running parallel to the mountains. In this paper, it is shown that the pattern of the strong negative anomalies of the Tempoku-Urakawa Zone can be explained by Vening Meinesz's theory of visco-elastic deformation of the crust by compressive stress. Time required for the deformation of the crust and density of sedimentary layer was also calculated and these results are in good harmony with the geohistorical evidence in this region.抄録全体を表示PDF形式でダウンロード (743K) -
松崎 卓一1962 年 8 巻 1 号 p. 38-41
発行日: 1962/12/30
公開日: 2010/09/07
ジャーナル フリーPDF形式でダウンロード (588K) -
1962 年 8 巻 1 号 p. 44a-46
発行日: 1962年
公開日: 2011/10/28
ジャーナル フリーPDF形式でダウンロード (215K) -
1962 年 8 巻 1 号 p. 44b
発行日: 1962年
公開日: 2011/10/28
ジャーナル フリーPDF形式でダウンロード (68K)
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