The purpose of this study was to develop a Japanese version of the Academic Athletic Identity Scale (AAIS-J) , originally developed by Yukhymenko-Lescroart (2014) and to examine the relationship between academic athletic identity and grade point average (GPA). The participants were 251 student athletes who compete at the national collegiate level (male:155, female:96, age: M=20.33, SD=1.18). The Academic Athletic Identity Scale (AAIS) (Yukhymenko-Lescroart, 2014) was translated into Japanese using the back-translation method, and the reliability and validity of the AAIS-J were examined. The results indicated the reliability (internal consistency) and validity (construct validity, criterion-related validity) of the AA-IS-J and illustrated the scale's usefulness. In addition, the result of examining the relationship between academic athletic identity and GPA showed that student athletes who have a higher academic identity indicated higher GPA, and higher athletic identity was also positively associated with GPA. These results indicated both similar and different results of previous studies about the relationship between student athlete identity and GPA, thus, this study provided new knowledge about Japanese student athletes. In conclusion, this study confirmed the reliability, validity and usefulness of the AAIS-J.
A beam homogenizer for a hollow-fiber-based, UV laser delivery system is proposed. A rectangular glass waveguide with an inner aluminum coating that has a 1-mm square cross section is attached at the output end of the circular-core hollow fiber with a 1-mm inner diameter. The rectangular waveguide generates a number of higher-order modes and results in a uniform top-hat profile. The configuration of the waveguide is designed by a ray-tracing technique so that both the low transmission loss and the high uniformity in the output beam are obtained. The fabricated waveguide shows a low loss of 0.4 dB, and the intensity variation coefficient is 7%. The output beam from the rectangular waveguide is expanded by a lens to the size larger than 10-mm square. It is also shown that the profile does not change with the bending condition.
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