巻号一覧
4 巻, 1 号
選択された号の論文の4件中1～4を表示しています
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G. ISHIKAWA, M. KADENA, M. KITAMURA1952 年 4 巻 1 号 p. 1-6
発行日: 1952/07/20
公開日: 2010/03/12
ジャーナル フリーIn the observation of ions in the atmosphere, we must consider that the observed values should differ from those in the free atmosphere owing to the deformation of the atmospheric electric field caused by the existence of the building, within which the observing instruments are settled. Therefore, comparison among the observed values at various positions would be meaningless, without taking account of such an effect of the electric field.
In this paper, we tried to find the suitable position of the aperture for drawing the air into the building in a few simple cases, so that the consideration of such an effect may be dispensed with.抄録全体を表示PDF形式でダウンロード (456K) -
Motokazu HIRONO1952 年 4 巻 1 号 p. 7-21
発行日: 1952/07/20
公開日: 2010/03/12
ジャーナル フリーIn two previous papers, I suggested that the electrical conductivity in E-W direction of the E region in a narrow belt along the magnetic equator is much greater than in the other latitudes, on account of a polarization field produced by the Hall Current, provided that λ is much less than 10. And that this high conductivity will cause enhanced diurnal magnetic variations near the magnetic equator.
In this paper, I discuss this theory further in detail. A dynamo theory for the E region with anisotropic conductivity, which is linked by highly conductive lines of magnetic force to the F region, is examined. A case that the E layer only makes a tidal oscillation, which produces observed lunar diurnal current system, is calculated. It is found that, in middle latitudes, the induced polarization field in E-W direction by the Hall Current is greater than that by the direct current, and the vertical drift of the F2 layer by this polarization field seems to be adequate for the observed F2 lunar variation. According to the present theory, conductivity of the E region at the magnetic equator decreases with increase of the main magnetic field, and the distribution of range of magnetic variations along the magnetic equator reported by Egedal, seems to support this relation.抄録全体を表示PDF形式でダウンロード (1666K) -
Takesi NAGATA, Seiya UYEDA, Syun-iti AKIMOTO1952 年 4 巻 1 号 p. 22-38
発行日: 1952/07/20
公開日: 2010/03/12
ジャーナル フリーAn experimental proof of self-reversal of thermo-remanent magnetization of igneous rocks is obtained. By cooling in a weak magnetic field, some igneous rocks and the ferromagnetic minerals separated from the mother rocks can have the remanent magnetization whose direction is opposite to that of the magnetic field during cooling. The processes of development and decay of the reverse thermo-remanent magnetization by cooling and heating respectively were directly observed (Figs. 11-19) and the characteristics of its appearance were examined. A few possible mechanisms of appearance of this peculiar phenomenon are discussed with reference to Néel's theory.抄録全体を表示PDF形式でダウンロード (1847K) -
Sadami MATSUSHITA1952 年 4 巻 1 号 p. 39-40
発行日: 1952/07/20
公開日: 2010/03/12
ジャーナル フリーPDF形式でダウンロード (201K)
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