- 著者
- Michiaki Arita Sergiu Arapan David R. Bowler Tsuyoshi Miyazaki
- 出版者
- Japan Society for Simulation Technology
- 雑誌
- 日本シミュレーション学会英文誌 (ISSN:21885303)
- 巻号頁・発行日
- vol.1, no.1, pp.87-97, 2014 (Released:2014-10-31)
- 参考文献数
- 24
- 被引用文献数
- 15 22 1
In oder to realize the DFT simulations on large-scale complex systems, we have been developing a linear-scaling DFT code Conquest. In this paper, we report the parallel efficiency of the code on K-computer and show that it has almost ideal parallel efficiency even when we use more than 200,000 cores. Using the code on such large-scale parallel computers, we are now ready to do actual DFT study on million-atom systems. By showing our current study on the nucleation of Ge dimers on three-dimensional Ge nano-islands on Si(001), we demonstrate that accurate, efficient and robust structure relaxation based on the DFT is possible in the actual scientific research on complex nano-structured materials.
- 著者
- Tomoko Yamaguchi Masafumi Kubota Hiroaki Naruse Koichiro Kuwatsuru Tsuyoshi Miyazaki
- 出版者
- The Japanese Association of Rehabilitation Medicine
- 雑誌
- Progress in Rehabilitation Medicine (ISSN:24321354)
- 巻号頁・発行日
- vol.6, pp.20210032, 2021 (Released:2021-08-26)
- 参考文献数
- 31
- 被引用文献数
- 3
Objectives : This study aimed to describe the injuries and illnesses that occurred at the 18th National Sports Festival for Persons with Disabilities in Japan, which was attended by more than 3000 athletes from beginner to elite levels.Methods : Records from medical stations set up at the venues for each sport were reviewed. The incidence rates (IRs) were calculated as the number of medical station visits per 1000 athlete-days. The backgrounds of injuries and illnesses were investigated.Results : In total, 3277 athletes attended the festival, and 134 eligible medical station visits were analyzed. Overall, 102 athletes complained of injuries. For the whole schedule of the festival, IRs were 15.5 for injuries and illnesses and 11.8 for injuries alone. For injuries and illnesses, high IRs were seen in soccer (39.8), basketball (25.6), and foot baseball (22.4); for injuries alone, high IRs were also seen in soccer (33.6), basketball (25.6), and foot baseball (16.8). The most frequent symptoms were internal symptoms (n=32), contusions (n=30), and wounds (n=24). Joint sprains occurred in various sports, whereas muscle strains happened mainly in disciplines demanding sprinting or high agility. Of the 55 cases that occurred during events or public rehearsals, 45 were traumatic, whereas the relation to sports activities was not described in 51 cases. Of participants with internal symptoms, 11 were suggested to have viral infections. We identified 21 injuries caused by falls.Conclusions : Minor trauma and viral infection were the most frequently observed symptoms among injuries and illnesses, respectively. Structured medical records and organized surveillance systems should be utilized to improve data collection and understand the onset of injury and illness.