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21.
Ayako Higashihara Takashi Ono Gaku Tokutake Rieko Kuramochi Yasuhiro Kunita Yasuharu Nagano 《Journal of sports sciences》2013,31(23):2744-2750
ABSTRACTIn this study, we aimed to clarify the characteristics of neuromuscular function, kinetics, and kinematics of the lower extremity during sprinting in track and field athletes with a history of strain injury. Ten male college sprinters with a history of unilateral hamstring injury performed maximum effort sprint on an athletic track. The electromyographic (EMG) activity of the long head of the biceps femoris (BFlh) and gluteus maximus (Gmax) muscles and three-dimensional kinematic data were recorded. Bilateral comparisons were performed for the EMG activities, pelvic anterior tilt angle, hip and knee joint angles and torques, and the musculotendon length of BFlh. The activity of BFlh in the previously injured limb was significantly lower than that in the uninjured limb during the late-swing phase of sprinting (p < 0.05). However, the EMG activity of Gmax was not significantly different between the previously injured and uninjured limbs. Furthermore, during the late-swing phase, a significantly more flexed knee angle (p < 0.05) and a decrease in BFlh muscle length (p < 0.05) were noted in the injured limb. It was concluded that previously injured hamstring muscles demonstrate functional deficits during the late swing phase of sprinting in comparison with the uninjured contralateral muscles. 相似文献
22.
采用ＰＳＭＴＥ７作为质粒,进行ＨＩＶ－１ｅｎｖ基因对ＣＤ４阳性单核细胞Ｕ９３７－２的导入与表达,ｅｎｖ基因导入细胞在微量重金属镉的诱导下,激活妄动子表达ｇｐ１２０及ｇｐ１６０经Ｗｅｓｔｅｒｎｂｌｏｔ转移显色后,可得清晰的ｅｎｖ目的的条带,此外,充式细胞仪对表达的ｇｐ１２０与ＣＤ４位点的结合作了分析,验证了该表达蛋白的结构与活性,从实验系可以观察到的表达ｇｐ１６０的ＣＤ４细胞株由于表达ｇｐ１６０而引 相似文献
23.
Yusuke Ikeda Hiroshi Ichikawa Rio Nara Yasuhiro Baba Yoshimitsu Shimoyama 《Journal of sports sciences》2017,35(2):189-195
The purpose of this study was to determine the installation of the backstroke start device reduces 15-m time. Thirteen college swimmers participated in this study. The aerial start and underwater motions were recorded with two digital video cameras. The center of mass (CM) of the swimmer, angular displacements and velocities of the shoulder, hip and knee joints were calculated. As an indicator of performance, the 5- and 15-m times were measured. The 5- and 15-m times in the backstroke start device condition were significantly shorter than in the non-backstroke start device condition. The vertical velocities of the CM at hand-off and toe-off in the backstroke start device condition were significantly greater than in the non-backstroke start device condition, while there was no significant difference in the CM horizontal velocity at toe-off. As a result, the height of the great trochanter at entry of the fingertips, with the backstroke start device, was 15 cm higher than in the non-backstroke start device condition. In addition, the CM horizontal velocities at 5 m in the backstroke start device condition were significantly greater than those of the non-backstroke start device. Thus, the use of the backstroke start device may reduce the 15-m time by diminution of the entry area. 相似文献
24.
Yasuhiro Yoshida Fumito Masui Michal Ptaszynski 《Information processing & management》2021,58(4):102542
In this paper, we propose a dialogue-based navigation system for narrow areas (e.g., buildings, etc.). In particular, we develop Campus Navigation Partner System (CNPS), intended for the use by freshmen (first-year students) who are likely to get lost in the new environment on the university campus (with the campus of Kitami Institute of Technology set as the experimental environment). The CNPS operates on a smartphone and has the functions of facility navigation and indoor information presentation. Indoor environment navigation is typically a problematic task because GNSS (Global Navigation Satellite System) signals cannot be received with sufficient accuracy within concrete walls. Therefore, we utilized natural language dialogue as a navigation method that guides the users within the facility using navigation messages and images. To investigate the effectiveness of the constructed system, we conducted practical experiments with freshmen and senior students of the university and evaluated the performance of the navigation functionality. Moreover, we investigated the general impressions of the system which we evaluated separately with both freshmen and senior students to clarify the differences in evaluation viewpoints between freshmen and users experienced in the campus environment (graduate students, etc.). 相似文献
25.
This study examined cognitive and affective responses of Japanese (N=199) and American participants (N=194) to the depiction of gender in a Japanese animé popular in both countries. As expected, Japanese respondents indicated more familiarity with the animation and also reported that they were fans to a greater extent than Americans. Japanese participants and males showed greater agreement with sex stereotyping in the depiction of characters. Males also showed greater liking for characters and expressed the belief that they were positive role models. American females disliked the characters, especially the female character, significantly more than all other participants. Finally, participants, regardless of country, who held conventional views of gender perceived fewer stereotypes in the depiction of the characters. Given the current interest in animé, implications of findings from viewing sex-stereotypical images and directions for future research are discussed. 相似文献
26.
Satomi Izumi Taylor Cosby Steele Rogers Arleen Theresa Dodd Toshiko Kaneda Iku Nagasaki Yasuhiro Watanabe 《Journal of Early Childhood Teacher Education》2013,34(4):311-321
Abstract Early childhood teachers’ understandings of play were examined in a qualitative comparative study of 41 Japanese and 41 American participants. Qualitative analysis of the data yielded five themes: the power of living, the opportunity to learn and to develop, fun activities, child's work, and the opportunity to explore nature. Two themes emerged in regard to the meaning of play for adults: enjoyable and voluntary activities and child's play. Finally, we identified two themes regarding playfulness: state of heart and fun feelings. Teachers in both nations used rhetoric that is congruent with the current Zeitgeist of developmentally appropriate early education. One theme that differentiated the groups was the notion that play is children's work. While several Americans mentioned this slogan, this was not the case for the Japanese participants. In contrast, the theme of play as the power of living was more representative of Japanese teachers’ understandings of play, and this reflects the philosophy set forth by the Japanese Ministry of Education, Culture, Sports, Science, and Technology. 相似文献