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Article type: Cover
1976 Volume 9 Pages
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Published: 1976
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Article type: Index
1976 Volume 9 Pages
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Published: 1976
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Kosuke IKEMURA
Article type: Article
1976 Volume 9 Pages
1-5
Published: 1976
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Programs of graphic display for a mini computer (HITAC 10, with 8K 16 bit words of core storage) are described in this paper. There are two programs; one enables the computer to plot line, circle and character on the CRT directly after loading the data from the TTY keyboard, and the other can display graphically on the CRT the results computed using the FORTRAN language. Pictures show some examples displayed on the CRT.
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Yoshio KOGA
Article type: Article
1976 Volume 9 Pages
6-15
Published: 1976
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Many references are written on the designs of a gas turbine. But there are none which explain the entire design process from stage to stage. Taking type 7000 of Hitachi G.E. gas turbine as a model, its whole design method is shown in this paper. The 7000 type is the most improved and most powerful gas turbine in the G.E. family. The solidity of compressor varies considerably according to the amount of work allotted to each stage. How to distribute most efficiently the work to each stage is described. In turbine design, the most difficult problem is to determine the Mach number of exit velocity c2. How to determine the Mc2 to each stage is explained. Another important value of u/c1 is chosen in this paper, so that the blade root reaction degree is.10. Four gas turbines of this type combined with one steam turbine, so called STAG plant is obtained, which recently attracts wide attention as middle load power plant of a low public nuisance. It gives total 400 Mw, and over 40% net plant efficiency can be expected.
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Naoto YOSHIDA
Article type: Article
1976 Volume 9 Pages
16-23
Published: 1976
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This paper provides the fundamental principles of anisotropic elasticity and investigates the transformation of the modulus of elasticity under the rotation of coordinate axes. For example, the modulus of elasticity of an orthotropic elasticity can be investigated.
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Yuji AZUMA
Article type: Article
1976 Volume 9 Pages
24-26
Published: 1976
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We have no reports in even networks, applied in Incidence Theory containing Distributed Line. In this paper the author has tried to consider, at first step, Loop matrix and Incidence matrix for Distributed line, and then, he has extended the incidence theory to Tumped-parameter circuit, containing Distributed line.
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Shinzi KODAIRA, Koichi ISHII, Tsuyoshi NAKAMURA, Junji INATANI
Article type: Article
1976 Volume 9 Pages
27-32
Published: 1976
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Recently many emission lines from interstellar molecular clouds have been observed by radio astronomical techniques at millimeter wave. In these, Carbon Monoxide is the most abundant molecule and it yieids much important information about the structure of our Galaxy.
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Katsuhiko KUMAGAI
Article type: Article
1976 Volume 9 Pages
33-47
Published: 1976
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This is a report obtained from my studies in Tokyo University for the past year. This report consists of four parts: (2) TECNET (Tokyo Experimental Computer Network); (2) the construction of File Control System; (3) TSS (Time Sharing System) andits File Control System; (4) HITAC 8700/8800 Online File Control System. And all these items are described in the field of hardwear and System Constitution. Moreover, I should like to say that all of them are a part of Computer Network and its basis.
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Masami UCHINAMI
Article type: Article
1976 Volume 9 Pages
48-53
Published: 1976
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In recent years, many reports of analysis for 3 phase bridge rectifier circuit by using digital computer have been made. These methods are very difficult and want large memory. But this method dose not need a large quantity of memory and the program is very simple. By this method, first, new simultaneous equations are set up on the condition of each rectifier element, and analyses are continued automatically. Using the simulation, we could obtain useful results for many fault conditions.
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Yoshinori HONDA, Ayao TAKAISHI
Article type: Article
1976 Volume 9 Pages
54-65
Published: 1976
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Recently, the sewage treatment works have been received industrial wastes. Therefore, sewage has contained the substances of phenols, cyanides, strong acids, strong alkalis, heavy metals and others. It is important to examine the effects of these substances on biological treatment. This paper reports the effect of the toxic substance by means of the trickling filter process. It includes the effect of the toxic substance on the removal efficiency and the accumulation of copper in the slime. The copper was chosen as the toxic substance.
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Shigeo IITAKE
Article type: Article
1976 Volume 9 Pages
66-72
Published: 1976
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The specific surface and the pore-distribution of soils that obtained by nitrogen adsorption method have been studied experimentally. This paper treats the relation of specific surface of soils between sedimentation analysis and B.E.T. method, and on the influence of drying on the specific surface and pore-distribution of Kanto-Loam. The results are as follows; (1) The difference of specific surface between B.E.T. method and sedimentation analysis becomes the greater as the particle of soils becomes smaller in size. (2) Kanto-Loam has micro pore (20 〜 100Å) very much more than other soil. (3) The specific surface and the micro pore of Kanto-Loam increase as drying temperature does.
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Susumu KOIKE
Article type: Article
1976 Volume 9 Pages
73-80
Published: 1976
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Tests were made of seventeen post-tensioned prestressed concrete T-beams. The primary variables were, the presence or absence of bond; the span/depth ratio of beam; the effective prestress force. On the basis of test results, we considered flexural behavior and ultimate strength of unbonded post-tensioned prestressed concrete T-beams. In this paper we described a method of calculation of flexural strength of unbonded prestressed concrete T-beams. Calculation values agreed well with the experimental results within the limits of this experiments.
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Masaki OKI
Article type: Article
1976 Volume 9 Pages
81-84
Published: 1976
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Hydraulic jump phenomenon has been remarked as one of the singular phenomena of Fluid Mechanics. And it has been reserched about the length of hydraulic jump and the relation of various quantity in a hydraulic jump, etc. In this treatise, we tried to analized a hydraulic jump on a momentum equation, using the equipment which generated hydraulic jump, about the steady jump and strong jump in our hydraulic laboratory. Practically, hydraulic jump length and its inside condition, which decide the apron length, and become a basic data about preventive scouring, in a sluice-gate or a dam. And then, it becomes neccesary to know the variation of energy in order that we know hydraulic jump length and its inside condition. In this point of view, we considered about the properties of hydraulic jump phenomenon.
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Shinji UEDA
Article type: Article
1976 Volume 9 Pages
85-96
Published: 1976
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In this paper, we describe the results of the experiments on the effect of the physical properties, gradation and shape of hard-granulated blast-furnace slag on workability, bending and compressive strength of mortar or concrete. The results may be summariged as follows; 1) The bulk specific gravities of hard-granulated blast-furnace slag used in this experiments are 2.61〜2.81, which are comparatively large. While the absorptions of this slag are 1 percent or less which are smaller than mountain sand. 2) The mobility of the mortar made of the noncrushed-granulated blast-furnace slag is inferior to that of mountain sand, while the mobility of the mortar made of the crushed-hard-granulated blast-furnace slag is improved by the roundish shape of the slag and the properties as fine aggregate for concrete are satisfactory. 3) The crushed-hard-granulated blast-furnace slag can be utilized sufficiently as fine aggregate for concrete from the standpoint of the strength and workability of concrete.
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Tsuyoshi NAKAMURA, Shinji KODAIRA, Koichi ISHII
Article type: Article
1976 Volume 9 Pages
97-99
Published: 1976
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Radiometric observation of a total lunar eclipse were carried out on November 29, 1974, at the wave length of 6.0 mm. Eclipse cooling curue obtained for the region of arguments 15' at the mean field of the center on the moon. The curve showed the result that the region indicates maxmum temperature decreases of (4.7±0,6)%. Cooling rate was measured approximately 4.6゜K/hour.
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Kotaro SAMESHIMA
Article type: Article
1976 Volume 9 Pages
100-109
Published: 1976
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We hope that the successful students in the entrance examination are in conformity with their schoolwork after their entrance into this college. To pick out manyfitter students, we have picked them out by the total sum of marks of their achievement tests and their school reports sent from their junior high schools. Has this way ever attained our purpose mentioned above? We want to examine this question more deeply and theoretically. In this research, we will analyze the relation between scholarly attainments and achievement tests or school reports from junior high schools by using Person's correlation coefficient, Spearmann's rank correlation coefficient and multiple regression analysis. Then we will recognize the following; (a) A pupil's mark of school report sent from his junior high school is the mark of his ranking in his junior high school but we may regard the ranking as marks for scholarship. (b) When the null hypothesis for the correlation between their achievement tests and school reports is rejected, the sum total of these marks will well predict their scholarly attainments. The calculation in this research is performed by the electronic computer.
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Kunio TAKAHASHI, Tokihisa NAKAMURA
Article type: Article
1976 Volume 9 Pages
110-115
Published: 1976
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An improved apparatus was designed to prepare large organic crystals by the Bridgman method. The improved furnace, in which the whole process could be observed, was constructed from two concentric tube of Pyrex glass. A heating wire of nickel-chrome alloy was wound around the inner tube. Three sensors were used for the temperature control ranging from 0 to 100℃. Single crystals of naphthalene and durene were grown from melts of zone-purified material in the furnace. Details of the apparatus and the procedure are shown. Factors exerting influences on the preparations and crystalline properties are discussed.
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Kazushi TAMURA
Article type: Article
1976 Volume 9 Pages
116-119
Published: 1976
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There is a plasma pause near which has very different densities of the ions at the distance (L=3.7), 2.7 earth radij away from the earth surface. We compute the modes in which the plasma waves, nearly equal the lower hybrid frequencies and existing out of the plasma pause propagate through the plasma pause.
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Minoru MURATA
Article type: Article
1976 Volume 9 Pages
120-125
Published: 1976
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This paper treats the inclusive and the exclusive uses of the personal pronoun 'we'. Both are common uses in English. The former which includes the hearer is always used without any color in meaning. On the other hand, the letter sometimes, though not so often, has a delicate nuance in expression. For a good example 'our country' is compared with 'my country' in the 4th chapter. The exclusive use of the first person plural is found more often in Japanese than in English. The Japanese hesitate to use the singular form 'my country', 'my school', 'my classes', 'my teacher', and so on; while the singular 'my teacher' is used just as often as 'our teacher' in English. For this reason we should let our students use 'I' instead of the exclusive 'we' in our daily English classes.
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Minoru MURATA
Article type: Article
1976 Volume 9 Pages
126-129
Published: 1976
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The style of English has not been so much concerned about in the teaching of English in Japan. It is true that we have little time to treat the style difference of English in our daily classes, but another reason is that it is difficult to find good materials in style difference. Comparing English Course and American English Course of Linguaphone, we have found various differences between the two courses. Among others, the contrast between elegant formal expressions in English Course and clear informal expressions in American English Course is very impressive and will give us better and easier materials in studying the style difference of the living English language.
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Tadayoshi TANAKA
Article type: Article
1976 Volume 9 Pages
136-139
Published: 1976
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This curved approach differs from any previous jumping style, and it enables the jumper to take advantage of centrifugal force. The jumper uses force to hold his body in the circular approach path. When this force is released at take-off, the jumper's body is thrown in a line tangent to his circular approach, like whirling a stone in a sling, then letting go. The momentum throws the jumper toward the bar whithout any waste of his jumping force. Other styles force the jumper to control his speed and gather before leaping. The Fosbury technique allows the jumper to approach the bar at nearly full speed. The body leans backward as the take-off foot is planted. Then, the force keeping the body in the circular approach path is released to throw the body across the bar. The jumper adds an upward force at take-off, by pushing against the ground as hard as possible with the take-off foot. This push-off is accompanied by a transfer of momentum, achieved by sharply raising the in-side arm and out-side leg. This combines upward force with momentum, throwing the body across the bar. A final, very slight force is added for rotation as the jumper turns his back to the bar by twisting the out-side knee to the in-side as it is lifted up.
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Shimaho MATSUMURA
Article type: Article
1976 Volume 9 Pages
140-142
Published: 1976
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Article type: Appendix
1976 Volume 9 Pages
App1-
Published: 1976
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