A portable microcomputer-controlled inspection system has been developed for detection of magnetic properties of soft magnetic materials. It incorporates custom designed software for control of the magnetic field duri...A portable microcomputer-controlled inspection system has been developed for detection of magnetic properties of soft magnetic materials. It incorporates custom designed software for control of the magnetic field during operation such as demagnetization, field sweeping, and for data logging and analysis. Results are recorded using a 12-bit analog to digital converter and are then stored on disk. The magnetic hysteresis loop and Barkhausen noise data can be converted into important magnetic parameters: coecivity, remanence, and hysteresis loss, Barkhausen amplitude, and Barkhausen noise energy. This system incorporated with the magnetostriction, and magnetoacoustic emission, is then related with the nondestructive detection of material degradation.展开更多
As one might expect, motivational theorists have attempted to explain motivation in different ways. This case study at-tempts to provide relevant evidence for the contribution of motivation in second language learning...As one might expect, motivational theorists have attempted to explain motivation in different ways. This case study at-tempts to provide relevant evidence for the contribution of motivation in second language learning by looking at the success of Japa-nese study of an adult who learned Japanese at a later age 24, acquiring the target language over a 5-year period characterized bytotal exposure in Japan. The study shows that adult can still be successful to acquire second language if he is exposed to the envi-ronment and has strong motivation, and that the boundary of integrative motivation and instrumental motivation is not necessarilyclear-cut completely.展开更多
基金Reactor Pressure Boundary Materials Project !under the Nuclear R & D Program by MOST in Korea.
文摘A portable microcomputer-controlled inspection system has been developed for detection of magnetic properties of soft magnetic materials. It incorporates custom designed software for control of the magnetic field during operation such as demagnetization, field sweeping, and for data logging and analysis. Results are recorded using a 12-bit analog to digital converter and are then stored on disk. The magnetic hysteresis loop and Barkhausen noise data can be converted into important magnetic parameters: coecivity, remanence, and hysteresis loss, Barkhausen amplitude, and Barkhausen noise energy. This system incorporated with the magnetostriction, and magnetoacoustic emission, is then related with the nondestructive detection of material degradation.
文摘As one might expect, motivational theorists have attempted to explain motivation in different ways. This case study at-tempts to provide relevant evidence for the contribution of motivation in second language learning by looking at the success of Japa-nese study of an adult who learned Japanese at a later age 24, acquiring the target language over a 5-year period characterized bytotal exposure in Japan. The study shows that adult can still be successful to acquire second language if he is exposed to the envi-ronment and has strong motivation, and that the boundary of integrative motivation and instrumental motivation is not necessarilyclear-cut completely.
