巻号一覧
5 巻, 3 号
選択された号の論文の6件中1～6を表示しています
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Tsuneji RIKITAKE, Izumi YOKOYAMA1953 年 5 巻 3 号 p. 59-65
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーThis is to summarize the writers' studies on the anomalous behavior of geomagnetic variations in Japan which were published in a series of papers in the Bulletin of the Earthquake Research Institute [1]. An anomalously large amplitude of the vertical component of geomagnetic variations is pointed out at Hermanus, S. A., and some observatories in Japan. The distribution especially in Japan is statistically examined. The anomaly is found in a limited area in the central part of Japan. The results of the analysis based on the potential theory show that the anomaly is caused by the magnetic field originating in the earth. The anomaly is well approximated by an apparent magnetic dipole situated under central Japan. But it still remains unknown why such a localized anomaly occurs on occasions of geomagnetic variation.抄録全体を表示PDF形式でダウンロード (878K) -
Naoto KAWAI, Shoichi KUME1953 年 5 巻 3 号 p. 66-70
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーIn the study of natural remanent magnetic polarization of rocks, the authors found many kinds of sedimentary rocks whose major part of the polarity may probably be attributed to thermal fructuation after effect resulted under the influence of the geomagnetic field during the geological interval. In this paper are reported the polarity of tertiary rocks observed, and experiments of the related problems carried out in our laboratory.抄録全体を表示PDF形式でダウンロード (557K) -
Teruo SATO1953 年 5 巻 3 号 p. 71-82
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーIn this paper the dissociation of the nitrogen in the upper, atmosphere is studied. It is considered that the nitrogen atom is produced by dissociative recombination of the positive nitrogen ion and the electron, and by the pre-dissociation by the absorption in the Lyman-Birge-Hopfield band. The former is effective in the region above about 3.20km, while the latter predominent below that level. The disappearance of the nitrogen atom is mainly due to the recombination by two or three body collision. Approximately, the fomer mechanism of disappearance seems to be preponderant over the latter in the region where the dissociative recombination is conspicuous. Hence, two pairs of equations in an equilibrium state are solved. In the calculations, it is assumed that the temperature is constant throughout the region; the ratio of the concentation of the oxygen atom to that of the sum of the nitrogen is one-half; and the distribution of total nitrogen follows the law of gas in a static equilibrium, though the distribution of nitrogen molecule with height is not given previously. The results show that the nitrogen begins to dissociate at the level from 120km to 130km, and proceeds to completion at about 160km-220km. The concentration of the nitrogen atom has peak at about 140km-150km altitude and its magnitude is of the order of 1010/c.c..抄録全体を表示PDF形式でダウンロード (1265K) -
Saito HAYAKAWA, Shinsaku KOBAYASHI1953 年 5 巻 3 号 p. 83-93
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーVarious theories on the origin of the cosmic radiation are critically surveyed. Expected phenomena resulting from the galactic origin theory in which charged cosmic rays are trapped by the glactic magnetic field are discussed with special regard to the secondaries due to the collisions with interstellar hydrogen. Electrons through the decay process π→μ→e are then expected to amount 3-9% of the total intensity, depending upon the magnetic field strength in our galaxy. An alternative hypothesis that the cosmic radiation propagates in a straight way is also examined. It is proposed that this may be tested by observing primary photons, resulting from the decay process π°→2γ, which could be several percent of the total radiation at low latitudes.抄録全体を表示PDF形式でダウンロード (1303K) -
Hiroshi MAEDA1953 年 5 巻 3 号 p. 94-104
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーUsing available materials of recent rocket measurements, a calculation is made to obtain the atmospheric and ionospheric models of the upper atmosphere between 60km and 400km. On the basis of these models the vertical distribution of electrical conductivity and its height-integrated values for three ionospheric regions F, E and D are obtained. The results show that the conductivity of the E-region, especially near 100km, is most predominant, so that this region is most probably effective to the electrical currents producing daily magnetic variations.抄録全体を表示PDF形式でダウンロード (1029K) -
K. MAEDA1953 年 5 巻 3 号 p. 105-108
発行日: 1953/12/30
公開日: 2010/09/14
ジャーナル フリーPDF形式でダウンロード (414K)
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