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1 "Google神话" 近几年,Google兼并了从事博客软件研制的一批高新技术公司,同时施行数字图书馆计划,以整合全球所有的信息为使命,在全球掀起了轩然大波,创造了"Google神话". 相似文献
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A rejoinder to Gudykunst and Hammer's critique of a recent paper is presented. We argue that their position is based on two mutually exclusive propositions and cannot therefore be credible. We continue to maintain that the evidence on intercultural effectiveness shows both culture-general and culture-specific components. 相似文献
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Interested in incorporating social media into your teaching but wary of the effort it might take? According to the research reviewed by Paige Abe and Nickolas A. Jordan, the challenge may be well worth it in terms of increased student engagement. 相似文献
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Abe Johnson 《Community College Journal of Research & Practice》2018,42(6):389-404
This qualitative instrumental case study explored the experiences and perceptions of seven community college leaders of their use of anticipatory leadership. Two research questions guided this study: (a) How do community colleges use anticipatory leadership to respond to internal and external changes? (b) How do community college leaders use anticipatory leadership principles for problem solving? The themes that emerged to address question one were engagement with others is required to respond to change effectively, data analysis and currency of knowledge are required to identify gaps and to respond to them, leaders must be willing to take calculated risks, and leaders must communicate effectively in order for change to occur. The themes that emerged to address question two were analysis of data is instrumental to identifying and closing the gaps in institutions, leading to better informed decisions; and anticipatory leadership reduces the need to use reactionary leadership practices. The findings of the study are that the participants identified and supported that anticipatory leadership practices are effective for responding to change. The anticipatory leadership practices highlighted as needed by the participants included the need for leaders who are engaged, have the skills and ability to utilize data to make decisions, are current in their higher education knowledge, take calculated risks when needed, and can communicate effectively. These skills are needed for community college leaders to be able to be proactive versus reactionary in their decision-making, as well as effective with their gap analysis identification, trend predictions, decision-making, and problem solving. 相似文献
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Hayao Ozaki Atsushi Kubota Toshiharu Natsume Jeremy P. Loenneke Takashi Abe Shuichi Machida 《Journal of sports sciences》2018,36(6):691-696
To investigate the effects of a single high-load (80% of one repetition maximum [1RM]) set with additional drop sets descending to a low-load (30% 1RM) without recovery intervals on muscle strength, endurance, and size in untrained young men. Nine untrained young men performed dumbbell curls to concentric failure 2–3 days per week for 8 weeks. Each arm was randomly assigned to one of the following three conditions: 3 sets of high-load (HL, 80% 1RM) resistance exercise, 3 sets of low-load [LL, 30% 1RM] resistance exercise, and a single high-load (SDS) set with additional drop sets descending to a low-load. The mean training time per session, including recovery intervals, was lowest in the SDS condition. Elbow flexor muscle cross-sectional area (CSA) increased similarly in all three conditions. Maximum isometric and 1RM strength of the elbow flexors increased from pre to post only in the HL and SDS conditions. Muscular endurance measured by maximum repetitions at 30% 1RM increased only in the LL and SDS conditions. A SDS resistance training program can simultaneously increase muscle CSA, strength, and endurance in untrained young men, even with lower training time compared to typical resistance exercise protocols using only high- or low-loads. 相似文献
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Tsuyoshi Takeda Osamu Itoi Hideki Takagi Shozo Tsubakimoto 《Journal of sports sciences》2013,31(7):635-641
AbstractThe purpose of this study was to clarify factors to perform the hole-entry technique in the backstroke start. A total of 16 well-trained Japanese competitive swimmers were divided into two groups (backstroke specialists and non-specialists) to compare their backstroke start motions. Their backstroke motions were videotaped, and two-dimensional co-ordinates for the swimmers were obtained from the video images using direct linear transformation methods. A non-paired t-test and Mann–Whitney U-test were used to analyse the statistical difference of the kinematic variables between the groups. Backstroke specialists showed a significantly shorter 5 m time (P = 0.009, effect size = –1.54), a significantly higher position of the toe (P = 0.010, effect size = 1.47) at signal and of the hip at toe-off (P = 0.002, effect size = 1.94), a significantly larger hip joint angle at toe-off (P = 0.007, effect size = 1.60) and a significantly higher angular velocities of the hip joints (45–85%; P < 0.05) for the normalised time as compared to that of non-specialists. An earlier initiation of the extension and the maintenance of a higher extension speed at the hip joints were important factors in achieving an arched-back posture, which facilitated and water entrance with a small entry range. 相似文献
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Masahiro Horiuchi Yoko Handa-Kirihara Daijiro Abe Yoshiyuki Fukuoka 《Journal of sports sciences》2019,37(14):1638-1647
We investigated combined effects of ambient temperature (23°C or 13°C) and fraction of inspired oxygen (21%O2 or 13%O2) on energy cost of walking (Cw: J·kg?1·km?1) and economical speed (ES). Eighteen healthy young adults (11 males, seven females) walked at seven speeds from 0.67 to 1.67 m s?1 (four min per stage). Environmental conditions were set; thermoneutral (N: 23°C) with normoxia (N: 21%O2) = NN; 23°C (N) with hypoxia (H: 13%O2) = NH; cool (C: 13°C) with 21%O2 (N) = CN, and 13°C (C) with 13%O2 (H) = CH. Muscle deoxygenation (HHb) and tissue O2 saturation (StO2) were measured at tibialis anterior. We found a significantly slower ES in NH (1.289 ± 0.091 m s?1) and CH (1.275 ± 0.099 m s?1) than in NN (1.334 ± 0.112 m s?1) and CN (1.332 ± 0.104 m s?1). Changes in HHb and StO2 were related to the ES. These results suggested that the combined effects (exposure to hypoxia and cool) is nearly equal to exposure to hypoxia and cool individually. Specifically, acute moderate hypoxia slowed the ES by approx. 4%, but acute cool environment did not affect the ES. Further, HHb and StO2 may partly account for an individual ES. 相似文献
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Kawamoto R Miyagi O Ohashi J Fukashiro S 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):187-198
The aim of this study was to identify critical kinetic variables that lead to increased ball velocity during a side-foot passing kick in soccer. Seven experienced male soccer players and eight inexperienced players participated in the experiment. They were instructed to perform side-foot kicks along the ground with maximum effort with an eye on the target line. The joint angles, angular velocities, and torques of the kicking leg were determined based on the three-dimensional kinematic data. The mean ball speed of the experienced group (21.4 +/- 1.5 m/s) was significantly faster than that of the inexperienced group (16.0 +/- 1.0m/s; P < 0.001). The motions of the inexperienced players tended to be less dynamic than those of the experienced players. The most noticeable difference in the kinetics of the kick was found in the hip flexion torque throughout the back-swing phase until the leg-cocking phase. The mean peak value of the experienced group (168 +/- 20 N x or m) was significantly greater than that of the inexperienced group (94 +/- 17 N x or m; P < 0.001). To increase ball speed during a side-foot passing kick, the generation of hip-flexion torque during the earlier stage of kicking is critical. 相似文献
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