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Volume 34, Issue 10
Displaying 1-20 of 20 articles from this issue
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Kozo ISHIGURO1965 Volume 34 Issue 10 Pages 707
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Nobuo MIKOSHIBA1965 Volume 34 Issue 10 Pages 708-718
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSA brief review is given of recent theoretical and experimental studies on superconductivity irk semiconductors. After discussions on empirical and theoretical criterions of superconductivity is metals, theories of superconductivity in polar and many-valley semiconductors are reviewed in some detail. Experiments on superconductivity in Ge-Te and SrTiO3 are discussed with a comment on. superconductivity in semiconductors and semimetals under high pressures. Lastly, a brief comment is given on a possibility of organic superconductors (or room-temperature superconductors) and of surface superconductors.View full abstractDownload PDF (901K) -
Sukita NAKAHARA, Kunio SAKATE1965 Volume 34 Issue 10 Pages 719-726
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSThe desorbed water vapour from walls of conduit pipe has a large effect on measurement of very low humidity below -40°C in terms of dew-point temperature. This effect is investigated by the use of a vinyl tube and a copper pipe as the conduit pipe and the following are concluded to be important for the reduction of the effect. 1) The conduit pipe must be as thin and short as possible. 2) The pipe wall temperature must be kept below 30°C. 3) The flow rate of gas must be above 10l/min. Furthermore, the relation between the Reynold's number, Re, and the relative error of indicated dew-point temperature, (p-pi)/pi, is obtained, where p is the water vapour pressure corresponding to the indicated dew-point temperature at the outlet of the conduit pipe and pi is the water vapour pressure corresponding to the dew-point temperature of gas entering the conduit pipe, therefore (p-pi)/pi means the relative error of indicated dew-point temperature.View full abstractDownload PDF (644K) -
Kozo KURIHARA, Hiroshi KUNO1965 Volume 34 Issue 10 Pages 727-732
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSIn order to measure the fluidity of powder kept in flowing state, the movement of powder in a rotating horizontal cylinder is first analyzed in analogy of that of fluid. The stationary angle of inclination between the free surface of fluid in a rotating horizontal cylinder and the horizontal plane is measured from the profile of the fluid at one end of the cylinder, and the relations of this angle to the amount, viscosity, density of the fluid and the rate of rotation are theoretically derived, which are verified by measurements on several liquids. By applying this derivation to the case of powder, a quantity which may be called the viscosity of powder is obtained. Though this quantity can reasonably be applied to flowing powder mass as viscosity, observation made on velocity distribution of powder particles proved that the whole mass is not actually flowing, it consists of two parts: the one is actually flowing with velocity gradient between particle layers, the other one which is close to the cylinder walls follows the motion of the cylinder in bulk with no relative movement between particles.View full abstractDownload PDF (1684K) -
Shinji SUGANOMATA1965 Volume 34 Issue 10 Pages 733-739
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSA compensation method of voltage drop due to stray capacitance is investigated. Compensation coils of an arbitrary number are used in a generator circuit in a certain definite manner. This multiple loading coil method improves markedly the voltage efficiency of the generator, even when the stage number is larger and/or the capacitance ratio (capacitance of column capacitor to stray capacitance arising parallel to rectifier) is not high. As the coil number increases, the optimum coil inductance becomes larger and the voltage efficiency becomes high. Since the input impedance of a cascade circuit rises with the coil number, the leading input current and therefore the reactive input power decreases. The results are comfirmed by model experiments. In the present paper, the characteristics relating to multiple loading coils concerning Cockroft-Walton type, inverse type, symmetrical type, and symmetrical inverse type circuits are discussed and the equations for the optimum inductance of the compensation coil and the voltage efficiency are given.View full abstractDownload PDF (490K) -
Toshihiko SUMINOKURA, Toshiro SASAKI, Nobuaki AOKI1965 Volume 34 Issue 10 Pages 739-744
Published: October 10, 1965
Released on J-STAGE: February 20, 2009
JOURNAL FREE ACCESSMain factors which decide the dynamic viscoelastic properties of a plastic foam are the viscoelastic characteristics of the elastomer constituting the plastic foam and the cell structure. Another important factor that affects the dynamic viscoelastic property is the existence of air, for the flow of air is disturbed by the cell structure. The present paper describes the effect of air examined by the apparatus made in the authors' laboratory, which is also designed to be operated in vacuum. Experiments are carried out on cylindrical flexible polyurethan foam samples of various flow resistance at compressive strains of 20_??_150c/s. The experimental results show that the presence of air mainly acts to increase the value of tangent of loss angle, or tan d, and its increment is proportional to the flow resistance, frequency and square of specimen radius. These results can be explained by the behavior of inner air pressure, and the amount of inner air pressure can be calculated by the flow resistance of the specimen.View full abstractDownload PDF (1099K) -
Tetsuo KASAHARA, Yasaku WADA1965 Volume 34 Issue 10 Pages 745-752
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSA penetrometer of an improved type is devised on the basis of the principles described in a previous paper (Japan. J. Appl. phys. 1, 174 (1962)). With this penetrometer one can obtain not only the penetration depth in a given interval of time but also the automatic record of time required for the penetration of a given range of depth. This recorded time is found closely related to the viscosity of samples as predicted by the theory. Effects of load and conical angle of needlepoint on the penetration time are studied, and the needle of 90° tip is concluded to be most suitable. The scale reading of this penetrometer is compared with that of the conventional one for a series of asphalt samples. For the design of this penetrometer, care was taken to control the sample temperature and to obtain easy setting of zero point.View full abstractDownload PDF (1096K) -
Nobuyosi KIMURA1965 Volume 34 Issue 10 Pages 753-754
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSThe factors that are accountable for the error of film thickness monitored by the photoelectric extremum method are derived for a monolayer film. By using the Balzers G.S.M. monitoring apparatus, the relations between these factors and the standard deviation of measured values of film thickness are experimentally investigated.View full abstractDownload PDF (139K) -
Shinji SUGANOMATA, Yoshi AKATSU, Shigeru SUEMATSU1965 Volume 34 Issue 10 Pages 755-756
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSBeam pulsing by means of a grid electrode fitted outside the source canal is described. Pulsed beams of the width up to 0.2μs are obtained. The wave form of the pulsed beam is similar to that of the applied voltage pulse. The same result is obtained in the case of einzel lens where voltage modulation is applied to the electrode which is usually grounded.View full abstractDownload PDF (563K) -
Masaharu AOKI1965 Volume 34 Issue 10 Pages 757
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Masaharu AOKI1965 Volume 34 Issue 10 Pages 758
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Seiichi TANUMA1965 Volume 34 Issue 10 Pages 759
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Seiichi TANUMA1965 Volume 34 Issue 10 Pages 760
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Ryumyo ONAKA1965 Volume 34 Issue 10 Pages 761-766
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Yukio HASEGWA, Sadao NOMURA1965 Volume 34 Issue 10 Pages 767-769
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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Tomoya OGAWA1965 Volume 34 Issue 10 Pages 770-773
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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[in Japanese]1965 Volume 34 Issue 10 Pages 774
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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[in Japanese]1965 Volume 34 Issue 10 Pages 774a
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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[in Japanese]1965 Volume 34 Issue 10 Pages 775
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
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[in Japanese]1965 Volume 34 Issue 10 Pages 775a
Published: October 10, 1965
Released on J-STAGE: February 09, 2009
JOURNAL FREE ACCESSDownload PDF (126K)
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