In order to calculate the performance data for aircraft gas turbine engine thermodynamically, the formulas for pressure, temperature and enthalpy are established at each point from air-intake section to gas-exhaust section according to the flow of the air and combustion gases, and, as example, the performance values of one engine are calculated.

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Many factors are considered to increase or decrease the thrust performance of jet engine. Here, from the point of practical utility and repair of the engine, those factors were studied in reference to the records of the engine overhaul.

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In the drawing experiment of wire of 99.9% copper, the die is forced to vibrate by applying ultrasonics of 26 KHz in the direction of drawing. The results are as follows; 1. When the die is vibrated with ultrasonics, drawing force is reduced largely. 2. When the distance between die and pulley which rolls up the wire drawn is varied, the drawing force becomes a sinusoidal curve with respect to the variation of the distance. 3. The effects of ultrasonics for the reduction of the drawing force are decreased with the increase of drawing velocity or reduction ratio of sectional area of the wire. 4. The drawing force reduces with the increase of the amplitude of ultrasonic vibration induced in the die. From the experimental results, it may be concluded that a favourable method of using ultrasonics exists for making the drawing force small.

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Many analysis methods for the impedance of the antenna have already been proposed. It is, in general, assumed that copper loss of the conductor can be neglected. The increase of copper loss reduces the efficiency of the antenna and arises the noise in it, but on the other hand, it helps the bandwidth to spread as in the resonance circuit. For the straight dipole antenna composed of the conductor with copper loss, HALLEN's Method can be applied to its analysis. But its analysis accuracy will be lost due to the increase of copper loss. It can be thought that the decrease of accuracy is attributed to the expansion into power-series for current distribution with 1/Ω (Ω=log 2ι/a, 2ι; the antenna's length, 2 a; its diameter). In order to get high accuracy, therefore, the author expanded into power-series with 1/(30Ω-jZ/β) (Z; impedance of the conductor for unit length, β; pase constant) and deduced current distribution and the input impedance of the straight dipole antenna.

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This paper is a report on the results of the fundamental experiment on the properties of the structural light-weight aggregate concrete. The strength of the 2 types of structural light-weight aggregates produced in Japan is represented by 10 per cent crushing value according to BS code 812. Concerning the bond strength, the maximum crack spacing that has a relation to the bond properties of reinforcing bars and concrete is discussed by means of tension pull-out type test using squarely-sectioned tensile specimens with round bars and several variant types of deformed bars. From the results in the test the following may be concluded: 1) The 10 per cent crushing value is approximately in proportion to the bulk specific gravity in the case of the aggregate used in this experiment. 2) In a high strength light-weight concrete whose compressive strength is larger than 400 Kg/cm2, the compressive and the tensile strength of concrete are so much affected by the strength of aggregate. 3) The maximum crack spacing of the structural light-weight concrete is linger than the normal concrete by 20 to 30 per cent. Therefore, it is confirmed that the bond property of the structural light-weight concrete is a little inferior to the normal concrete.

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The quantity of seepage water out of the reservoir is very important for some purposes. In some cases if it is large, we must terminate our plan. In this paper I have described the way of obtaining the coefficient of permeability and how to calculate the quantity of seepage water on an example test. The coefficient of permeability necessary to calculate the quantity of seepage water was obtained by the following: 1) Method of using a small pool, 2) Method of using an auger hole, 3) Method of using a vertical shaft and 4) Laboratory test. Results of the above three methods 1), 2), 3) are about the same and the method 3) seemed as the best. I calculated the quantity of seepage water by the following, 1) Method of approximating the actual field to an earth-dam. 2) Method of approximating the reservoir to a rectangular drain. In the method 1) the result was obtaind as we expected, but not in the method 2), because of its too much quantity of the seepage water to be expected.

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An analysis of the night airglow near 6050A is made by using the result of two color photometry of the oxygen red line [01] 6300A and the night sky background 6050A. The emitting layer of the airglow which has the continum spectrum near the 6050A was observed in March and August 1966 by two rockets with photoelectric photometer, whose aim was to study the height profile of the airglow emissions. The emitting layer of the continum spectrum had distributed confined within 90 km to 140 km height of the ground, and it has peak intensity near the 115 km height. This fact coincides fairly well with the results obtained by other workers.

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It is a famous observational fact that at the geomagnetic storm there is a generation of the equatorial current. Some people undertake to clear up its cause theoretically, but its clarification has not yet been done. The impact of the plasma flow from the sun on the magnetic cavity causes the charged particles to be stored in the dawn and dusk meridian plane by a frictional interaction between the enhanced plasma flow and magnetic field lines, so the electric field is induced. In this paper, the generation of the equatorial current is tried to clear up with this electric field and the geomagnetic field.

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Measurements of the motor abilities were completed within seven months from January to July in 1968. The number of the subjects were 121 and they were all healthy ordinary males. The subjects aged 16 years old are of the second year class in Kisarazu Technical College. The results obtained were as follows; 1. As shown in table 1, Left-arm motor abilities are inferior in comparison with Right-arm motor abilities, and the mean value of the individual abilities were got about 93 percent to that of Right-arm motor abilities. 2. With regard to Left-arm, extensor strength are more inferior than flexor strength, including muscular-power and muscular-endurence as compared with Right-arm motor abilities. (Table 1) 3. The differences of motor abilities between Right and Left legs are comparatively small inclusive of all factors, and Left-leg motor abilities are superior in comparison to Right-leg motor abilities, exclusive of muscular-speed and muscular-coordination, and the mean value of the individual abilities were got about 102 percent to that of Right-leg motor abilities. (Table 1 shows the result) 4. Considering the correlation between measured values in the same factor, considerably high coefficient of correlations were obtained including ability value and rate of ability to Right-limbs motor ability both arm and leg. (Table 2) 5. In respects to arm motor abilities, a significant correlations were found, between muscular-power and the other many factors. (Table 2) 6. Observing the correlation between arm motor abilities and leg motor abilities in the same factor, significant correlations were found exclusive of muscular-speed in connection with record, but no significant correlations were found as respect to rates of abilities. (Table 2 shows the result) 7. As shown in figure 1 and table 5, there were more persons that idealy give credence to Right-side predominance than practical number, and it was less person that idealy give credence to Left-side predominance than practical number, in all factors both arm and leg. Particulary it was found a great accidental error as regards to legs.

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Language may be said to be the art of saying part of what we mean and of setting up clear implications of what else we mean without saying it. Ellipses are found in every language, but the ways of omission may be different. In this essay we gave a definition on ellipsis at first, and then explained the fundamental structures of the Japanese sentence and the English. The structure of Japanese is Adverbial modifiers + Predicate, and the latter is the main element of the sentence. Subject, object and complement are all essentially adverbial modifiers. The structure is simple, and not structural but situational. So ellipses in Japanese are all situational; that is, words are omitted on situational basis. On the contrary the English sentence has the fundamental structure: Subject + Predicate, and there is a relation of dominating each other between the two elements. Moreover, as it has other independent elements: object and complement, the structure is rather complicated. Therefore, ellipses in English are structural; that is, words are omitted on structural basis. So we tried to demonstrate the situational ellipsis in Japanese and the structural one in English, giving a number of examples.

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