No abstract

In this paper, a micro ultrasonic motor using a micro-machined bulk piezoelectric transducer is introduced. The cylindrical shaped bulk piezoelectric transducer, a diameter of 0.8 mm and a height of 2.2 mm, was developed as stator transducer for traveling wave type ultrasonic motor. The transducer was made of PZT bulk ceramics, and formed by micro-machining, Ni plating and laser beam cutting process. Using this stator transducer, we have fabricated a cylindrical micro ultrasonic motor, a diameter of 2.0 mm and a height of 5.9 mm. We have also evaluated some characteristics and succeeded in driving the micro ultrasonic motor. A MICRO ULTRASONIC MOTOR USING A MICRO-MACHINED CYLINDRICAL BULK PZT TRANSDUCER Cover Letter AbstractIn this paper, a micro ultrasonic motor using a micro-machined bulk piezoelectric transducer is introduced. The cylindrical shaped bulk piezoelectric transducer, a diameter of 0.8 mm and a height of 2.2 mm, was developed as stator transducer for traveling wave type ultrasonic motor. The transducer was made of PZT bulk ceramics, and formed by micro-machining, Ni plating and laser beam cutting process. Using this stator transducer, we have fabricated a cylindrical micro ultrasonic motor, a diameter of 2.0 mm and a height of 5.9 mm. We have also evaluated some characteristics and succeeded in driving the micro ultrasonic motor.

[Purpose] The purpose of this study was to examine whether a low intensity exercise using an eccentric contraction would result in skeletal muscle hypertrophy in rats. [Subjects and Methods] Eighteen female Wistar rats were used in this study. The rats were randomly divided into three groups. The control group performed no exercise. The level group ran on a treadmill on a 0° incline. The downhill group ran on a treadmill on a −16° incline. The two exercise groups ran on a treadmill at 16 m/min for 90 minutes, once every three days for a total of twenty sessions. [Results] The muscle wet weights, the relative weight ratios, and the muscle fiber cross-section minor axes of the downhill group were significantly larger than those of the control and level groups. There were no differences in the muscle wet weights, the relative weight ratios, and the muscle fiber cross-section minor axes between the control group and the level group. [Conclusion] The stimulation from the low intensity eccentric contraction may have produced enough mechanical stress to induce muscle hypertrophy without the over-stressing that might have produced muscle fiber damage. These results indicate that this technique may be an effective method of inducing hypertrophy in skeletal muscle.

TWO new acridone alkaloids, named glycofolinine 111 and acrifoline 121, were isolated from the root bark and stem bark of Glycosmis citrifolia collected in Taiwan. Their structures were elucidated by spectroscopic methods.Receiwd I8 April 1995

Abstract. There are no well-defined or documented boundaries for either the vastus medialis oblique or for the vastus medialis longus. The purpose of this study was to examine anatomically the boundaries of the vastus medialis longus and the vastus medialis oblique. In an embalmed adult cadaver, two vastus medialis muscles were examined by direct visual observation. Our observations indicate that the boundary of the vastus medialis oblique and the vastus medialis longus appears to be the line from the adductor hiatus to the medial rim of the patella. This finding indicates that the vastus medialis oblique and vastus medialis longus may have different functions in the vastus medialis.