- 著者
- Hirotaka Asai Takayuki Tanaka Hidekazu Murata Eiji Rokuta
- 出版者
- The Japan Society of Vacuum and Surface Science
- 雑誌
- e-Journal of Surface Science and Nanotechnology (ISSN:13480391)
- 巻号頁・発行日
- vol.19, pp.131-142, 2021-12-28 (Released:2021-12-28)
- 参考文献数
- 47
The surface diffusion method was used to produce tungsten (W) nanopyramids coated with monolayer films of platinum (Pt) and gold (Au). Although the general structures of the nanopyramids were the same, the top of the nanopyramids was different from the Pt and Au cases, i.e., a monomer was observed for Pt, whereas a trimer observed for Au. The effects of simultaneous heating and the electric field on the structural evolution of nanopyramids were also studied. We observed that the broken nanopyramids were rapidly regenerated by heating in an electric field. The opening angles of field-emitted electrons were found to be approximately ±2° and ±2.5° for Pt and Au, respectively. From the obtained results, it was observed that the field-emission properties of all specimens were almost the same.
- 著者
- Yoshio Tsuchiya Takayuki Tanaka Tamotsu Kamishima
- 出版者
- Japanese Society for Medical and Biological Engineering
- 雑誌
- Advanced Biomedical Engineering (ISSN:21875219)
- 巻号頁・発行日
- vol.9, pp.181-188, 2020 (Released:2020-09-19)
- 参考文献数
- 21
- 被引用文献数
- 3
Lumbar loading causes increased intervertebral pressure and is an important factor in low back pain. However, it is difficult to quantitatively judge the actions that affect lumbar load and the magnitude of lumbar load increase. Low back pain occurs not only in the workplace but also during activities of daily living. Therefore, it is necessary to investigate the factors inducing low back pain by measuring movements in various planes and determining the magnitude of the lumbar load. Accordingly, the lumbar spine should be examined during various movements. Several studies have examined vertebral bodies in the anteflexion posture. However, the relationship between body flexion angle and vertebral body angle during lateral flexion and rotation remains unknown. In this study, we proposed an estimation method for changes in vertebral body angle during lateral flexion and rotation in the lumbosacral region using a wearable sensor system we previously developed. The accuracy of the proposed estimation method was evaluated and demonstrated using X-ray images.