- 著者
- Mizuki Konagaya Teruo Ohsawa Takaya Inoue Toshinari Mito Hideki Kato Kazuhiro Kawamoto
- 出版者
- Meteorological Society of Japan
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- vol.17, pp.234-238, 2021 (Released:2021-12-18)
- 参考文献数
- 13
- 被引用文献数
- 1
To develop offshore wind energy, we investigated nearshore wind conditions, notably the land–sea contrast, using the coastal area of Mutsu-Ogawara, Aomori Prefecture as a case study. We found that wind conditions were substantially different between onshore (MT-A1) and offshore (MT-B) sites, even when the latter were only 1.5 km apart. The mean wind speed at 55 m above sea level at MT-B was higher than that at the onshore site by up to 20% monthly and 12% annually. For winds from the landward side, the Iref value (turbulence intensity at a mean wind speed of 15 m/s) at MT-B was 37% lower than that at MT-A1. Because such high wind speeds and low turbulence conditions are preferable for the operation of wind turbines, an offshore wind farm would have advantageous wind conditions, even if placed close to the coastline. Moreover, we found that the land–sea contrast is caused not only by mechanical factors, such as roughness length, but also by thermodynamic factors such as seasonal variations of atmospheric stability over land and sea.
- 著者
- Mizuki Konagaya Teruo Ohsawa Takaya Inoue Toshinari Mito Hideki Kato Kazuhiro Kawamoto
- 出版者
- Meteorological Society of Japan
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- pp.2021-041, (Released:2021-10-27)
- 被引用文献数
- 1
To develop offshore wind energy, we investigated nearshore wind conditions, notably the land–sea contrast, using the coastal area of Mutsu-Ogawara, Aomori Prefecture as a case study. We found that wind conditions were substantially different between onshore (MT-A1) and offshore (MT-B) sites, even when the latter were only 1.5 km apart. The mean wind speed at 55 m above sea level at MT-B was higher than that at the onshore site by up to 20% monthly and 12% annually. For winds from the landward side, the Iref value (turbulence intensity at a mean wind speed of 15 m/s) at MT-B was 37% lower than that at MT-A1. Because such high wind speeds and low turbulence conditions are preferable for the operation of wind turbines, an offshore wind farm would have advantageous wind conditions, even if placed close to the coastline. Moreover, we found that the land–sea contrast is caused not only by mechanical factors, such as roughness length, but also by thermodynamic factors such as seasonal variations of atmospheric stability over land and sea.
- 著者
- Naoto Yoshinuma Ryosuke Koshi Kazuhiro Kawamoto Masataka Idesawa Naoyuki Sugano Shuichi Sato
- 出版者
- 日本大学歯学部
- 雑誌
- Journal of Oral Science (ISSN:13434934)
- 巻号頁・発行日
- vol.58, no.1, pp.137-140, 2016 (Released:2016-03-26)
- 参考文献数
- 10
- 被引用文献数
- 3
This case report describes the clinical efficacy of treatment with basic fibroblast growth factor (FGF-2) for periodontal regeneration. A patient with aggressive periodontitis participated in a clinical trial involving administration of 0.3% FGF-2 in comparison with a placebo control. To evaluate the efficacy of FGF-2, standardized radiographs were taken before surgery and at 12, 24, and 36 weeks after FGF-2 treatment. The rate of increase in alveolar bone height was 86.9% at 36 weeks. The 6-year postoperative radiograph showed significant development of alveolar bone in comparison with the first visit. FGF-2 treatment may be effective for periodontal regeneration in cases of aggressive periodontitis. (J Oral Sci 58, 137-140, 2016)