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1.
Tachibana K Yashiro K Miyazaki J Ikegami Y Higuchi M 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(1):44-58
Although it is clear that rowers have a large muscle mass, their distribution of muscle mass and which of the main motions in rowing mediates muscle hypertrophy in each body part are unclear. We examine the relationships between partial motion power in rowing and muscle cross-sectional area of the thigh, lower back, and upper arms. Sixty young rowers (39 males and 21 females) participated in the study. Joint positions and forces were measured by video cameras and rowing ergometer software, respectively. One-dimensional motion analysis was performed to calculate the power of leg drive, trunk swing, and arm pull motions. Muscle cross-sectional areas were measured using magnetic resonance imaging. Multiple regression analyses were carried out to determine the association of different muscle cross-sectional areas with partial motion power. The anterior thigh best explained the power demonstrated by leg drive (r2 = 0.508), the posterior thigh and lower back combined best explained the power demonstrated by the trunk swing (r2 = 0.493), and the elbow extensors best explained the power demonstrated by the arm pull (r2 = 0.195). Other correlations, such as arm muscles with leg drive power (r2 = 0.424) and anterior thigh with trunk swing power (r2 = 0.33 5), were also significant. All muscle cross-sectional areas were associated with rowing performance either through the production of power or by transmitting work. The results imply that rowing motion requires a well-balanced distribution of muscle mass throughout the body. 相似文献
2.
关联规则挖掘是解决电子商务推荐问题的重要方法之一.针对传统关联规则挖掘算法在解决移动电子商务环境个性化推荐问题时反复扫描数据库,频繁项挖掘效率低,关联规则挖掘准确率低以及规则大量冗余等不足,提出一个基于事务矩阵和用户兴趣度的关联规则挖掘算法(Matrix-and-Interestingness-based Association Rules Mining,MIbARM).该算法仅需扫描一次数据库,并在挖掘过程中不断缩小算法搜索空间以避免生成冗余候选项,同时避免了冗余规则挖掘,从而提高了挖掘效率.最后,在四组人工数据和160种参数组合的数值实验环境下,引入Apriori、CBAR 及BitTableFI算法对MIbARM进行对比验证.结果表明,在不减少有趣规则的前提下,MIbARM不但可有效避免冗余候选项集的产生,而且大幅减少了冗余规则数量,极大提高了算法的搜索效率,同时提升了个性化推荐的质量,更适用于移动电子商务环境下的个性化推荐问题. 相似文献
3.
Temporal variation of dynamical modal properties of a base-isolated building is investigated using earthquake records in the building. A batch processing least-squares estimation method is applied to segment-wise time-series data. To construct an input-output system, an auto-regressive model with exogenous input （ARX） of second-order including a forgetting coefficient as a weighting coefficient is used for the estimation of modal parameters. The fundamental and second natural frequencies and the damping ratios of the fundamental and second natural modes of the base-isolated building are identified in the time domain. The identified results are consistent with the results obtained from the micro-tremor vibration data, forced-vibration test data and earthquake records in the present base-isolated building in the case of taking into account the amplitude-dependency of the iso- lators and viscous dampers. It is finally pointed out that several factors, e.g., amplitude dependency of the isolator and damper system and special characteristics of the series-type viscous damper system, may be related complicatedly with the temporal variation in modal properties of the above-mentioned system. 相似文献
4.
Mitsuru Sunada 《Journal of Cultural Economics》2012,36(3):179-206
This study assesses the 1951 Toho?CSubaru antitrust merger case in the Japanese movie theater market. Using information regarding the location of theaters in the Tokyo metropolitan area, I examined the relationship between the number of attendees and the structure of the local market competition: a regression equation relating to the number of attendees and the local market structure was derived from a model of product differentiation, which incorporated the features of a movie theater market. The results revealed that nearby rival theaters had negative effects on other theaters?? attendance numbers, and these effects did not dissipate even where there was 10?km between each theater. Based on empirical results, it appears that the Tokyo High Court and the competition agency defined the geographic movie theater market as being smaller than it actually was. The results of this study suggest that the application of econometric analysis, combining geographic information, is useful in merger reviews of retail industries, such as movie theaters. 相似文献
5.
Bilateral leg extension power and fat-free mass in young oarsmen 总被引：1，自引：0，他引：1
We evaluated the impact of bilateral leg extension power and fat-free mass on 2000 m rowing ergometer performance in 332 young oarsmen (age 21+/-2 years, height 1.76+/-0.05 m, body mass 62+/-6 kg; mean+/-s). The 2000 m rowing performance time was correlated with height (1.62-1.93 m; R2=0.23, P<0.001), body mass (53-95 kg; R2=0.53, P<0.001), fat-free mass (47-82 kg; R2=0.58, P<0.001) and bilateral leg extension power (1202-3302 W; R2=0.38, P<0.001). Multiple regression analysis selected fat-free mass and bilateral leg extension power as regressor variables. Fat-free mass explained 58% of the variability in rowing performance and the inclusion of bilateral leg extension power improved the power of prediction by 5%. The results suggest that rowing involves almost every muscle in the body and that bilateral leg extension power is very important during this activity. 相似文献
6.
In 1972 a longitudinal study was launched in one of the largest department store chains in Japan. The purpose of this study was to investigate the managerial career development of the newly hired college graduates. The research design required repeated monitoring of a newcomer's progress within the organization at seven different points in time over a three-year period. The study investigated basic questions concerning the process of managerial career development: (1) Why do some people achieve a higher level of management progress during the early period of their organizational career, while others do not? (2) What are the important indicators of management development during the formative years in business? (3) How accurately can development in management be predicted? (4) What are the organizational and personal consequences of managerial development? Over the three-year period of this study data were collected on 80 newly hired college graduates. Two models that have been used to understand the process of early management development in the United States were tested. Results were compatible with these models. Performance at the end of three years was found to be significantly related to both initially assessed potential (assessment model) and developed working relationships (vertical exchange model). Other professional and organizational outcomes were significantly related to developed working relationships. The implications of this cultural generality are discussed. 相似文献
7.
This article reconsiders the relationship between transnationalism from above and from below, focusing on the consumer behavior of migrant workers. Although transnationalism from below may be regarded as positive resistance to dependence on nation-states and global capital, it also facilitates incorporation into global consumer cultures. This article reports how Bangladeshi return migrants have been enchanted by consumer practices in industrialized countries and have transmitted them into Bangladesh. Return migrants bring consumption habits as well as savings and remittances from industrialized countries. Returnees consequently spread consumer culture to their homelands efficiently, promoting the penetration of global capital and further migration. 相似文献
8.
Takuro Higuchi 《Inter-Asia Cultural Studies》2013,14(3):467-475
Since Seattle 1999, plenty of summit protests around WTO, G8/20, IMF, WB, COP, and so on happened in each of the different summit sites in the last decade. Such incidents were amazingly accepted because of their mass actions and widespread networks of activists sustaining a series of mass actions. As some researchers argue, those of generating networks are based on horizontality and autonomy, and they have already prefigured a powerful model for (re)organizing society. However, on the other hand, some researchers also argue the major shortcomings. In theory, the ‘Global Activist Network’ has been constructed since Seattle, although in practice there has still been a serious spatial gap between the Western part of the world and the other side of the world. Actually, the global activist network has excluded Asia. However, in 2008, the G8 summit was held in Japan. This paper, thus, aims to show that the global activist network since Seattle, which was limited to Europe and North America, has expanded to involve Asia through the 2008 G8 summit in Japan. The 2000 G8 in Japan was right after the Seattle in 1999, yet, due to its single-issue and national character of the movements, globally expanding networks didn't reach Japan. However, movements around the 2003 anti-Iraq war brought in the autonomous character of the alter-globalization movement and referred to the legacy of autonomous activisms. During the 2008 G8, some autonomous activists in Japan took over the diversity of tactics and networks of activists inherited since PGA, DAN and ‘Dissent!’. 相似文献
9.
Chris Forlin Norimune Kawai Satoshi Higuchi 《International Journal of Inclusive Education》2013,17(3):314-331
Within a tradition of a dual regular and special education system in Japan, the Government is promoting education reform that encourages an inclusive approach to education. This research investigates whether teachers are being trained for successful inclusion in Japan by reviewing the perceptions of all pre-service teachers in one university regarding their readiness for becoming inclusive practitioners. A move towards an inclusive approach to education in Japan is being promoted through collaboration and support between teachers trained in regular and special education. Thus, different perceptions of pre-service teachers preparing to work either in elementary schools or in special schools are a particular focus of this research. Discussion considers the need for better teacher preparation due to the very low understandings of inclusion and Japanese pre-service teachers’ perceived lack of skills, knowledge, experience, or training for an inclusive approach. 相似文献
10.
This paper provides a new point of view regarding the knowledge management of new product development (NPD), a high-tech field requiring the merging and integration of different technologies. As a case study, we examine the dynamism of the knowledge creation process in NPD at Nippon Telegraph and Telephone Corporation (hereafter referred to as NTT), a traditional Japanese telecommunication company, as it merges and integrates the different elements of broadband network technology, network operation technology, and multimedia processing technology etc., and we analyze the NPD processes of NTT. In a short period of time, a strategic team at NTT, consisting mainly of informal cross-functional middle managers transcending NTT's business divisions, formed strategic communities inside and outside the company, and then formed a network that transcended the strategic communities' boundaries. The synthesizing capability of the leadership-based strategic communities comprising community leaders inside the networked strategic communities enabled NTT to build new business models aimed at customers and achieve successful NPD ahead of other competitors. 相似文献