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Vibration and Noise of Gears of Damping Alloy
Oda, Satoshi,Koide, Takao,Shimizu, Hisao,Miura, Kenzo 대한기계학회 1996 International Sessions in Celebration of the 50th Vol.1 No.1
This paper presents a study on vibration and noise of gears of damping alloy. The logarithmic decrements of damping alloy were measured and compared with those of conventional steel. Vibration acceleration and sound pressure of helical gear pairs and spur planetary gear units of the damping alloy were measured under various running conditions using a power-absorbing-type gear testing machine, and the results were compared with those for conventional steel gears. Furthermore, the sound intensities of planetary gear units of damping alloy and conventional steel were also measured. The vibration and noise characteristics of these gears were determined.
Masahumi Johkan,Masayuki Oda,Kazuhiko Mitsukuri,Satoshi Yamasaki 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.3
The complete decapitation method (CDM), which regenerates multiple shoots from the cut surfaces of the main and lateral stems of plants grown in vivo, was reported as a new vegetative propagation method in tomato plants. The practical use of CDM, however, was restricted because of varietal and seasonal variations of the shoot regeneration. Therefore, we investigated the effect of etiolation at the cut ends of stems on the shoot regeneration to diminish the varietal and seasonal variations in CDM. Etiolation increased number of regenerated shoots in four tomato cultivars, and decreased variation coefficient of the values by 48% in comparison with unetiolation. Etiolation promoted shoot regeneration in five seasons, and variation coefficient of regenerated shoot number in the five seasons decreased by 33% in comparison with unetiolation. These results indicated that etiolation promoted shoot regeneration and diminished the varietal and seasonal variations of shoot regeneration, and made CDM applicable to practical use.