2 0 0 0 OA 合せ鏡対乃振袖 2編6巻
2 0 0 0 佐野利器
- 出版者
- 佐野博士追想録編集委員会
- 巻号頁・発行日
- 1957
- 著者
- MOGI,Motoyoshi
- 出版者
- 東京昆蟲學會
- 雑誌
- 昆蟲
- 巻号頁・発行日
- vol.44, no.3, 1976-09-25
A new species of streblid batfly belonging to the genus Brachytarsina is described. This is the second species of the genus to be known from the Ryukyus and the third one from Japan.
- 著者
- Shengning Zhang Yaokun Li
- 出版者
- 公益社団法人 日本気象学会
- 雑誌
- SOLA (ISSN:13496476)
- 巻号頁・発行日
- vol.18, pp.254-258, 2022 (Released:2022-12-09)
- 参考文献数
- 22
The ENSO phenomenon is investigated by building a fractional derivative recharge-discharge model in which the integer derivative is replaced with the left-sided Caputo type fractional derivative. The results suggest that when the highest order fractional derivative is larger than 1 but smaller than or equal to 2, the model exhibits a variation between exponential decay and pure harmonic oscillation. The system will strengthen to an El Niño/La Niña event and then weaken to the neutral state which does not require a zero value. Therefore, there is only a life cycle of an El Niño/La Niña event, rather than the life cycle of a complete ENSO event in the pure harmonic oscillation. When the highest order fractional derivative is larger than 2, the model exhibits an exponential-like amplified oscillation. The system benefits to exhibit the life cycle of strong ENSO events. The fractional derivative recharge-discharge model, in general, extends the integer model and can be applied in studying the complexity in ENSO phenomenon.
- 著者
- 岸本 智典
- 出版者
- 教育思想史学会
- 雑誌
- 近代教育フォーラム (ISSN:09196560)
- 巻号頁・発行日
- vol.30, pp.185, 2021-09-11 (Released:2022-09-18)
- 著者
- SHINSUKE KAWAGUCCI KOTARO SHIRAI TEFANG FAITH LAN NAOTO TAKAHATA URUMU TSUNOGAI YUJI SANO TOSHITAKA GAMO
- 出版者
- GEOCHEMICAL SOCIETY OF JAPAN
- 雑誌
- GEOCHEMICAL JOURNAL (ISSN:00167002)
- 巻号頁・発行日
- vol.44, no.6, pp.507-518, 2010-12-20 (Released:2013-03-23)
- 参考文献数
- 60
- 被引用文献数
- 14 35
Hydrothermal plumes above the HAKUREI and JADE sites, two high-temperature hydrothermal vent sites in the Izena Cauldron at the mid-Okinawa Trough, were investigated in order to gain a preliminary understanding of gas geochemical characteristics at underlying hydrothermal vent sites. Three geochemical tracers, H2, CH4 and δ3He, covary with each other above the HAKUREI site but only CH4 and δ3He are correlated above the JADE site. The carbon isotope ratio of methane within the Izena Cauldron can be accounted by a combination of the fluid dilution by ambient seawater and microbial consumption with the kinetic carbon isotope effect (KIE) of 1.007. An estimated endmember δ13C value of -32‰ in the HAKUREI fluid was obtained. Both the plumes above the HAKUREI and JADE sites showed C1/C2 ratios between 103∼104. Only the bottom water around the HAKUREI site showed significant N2O excess with isotopically light δ15N and δ18O, suggesting N2O input from microbial activity in the sediment. A linear correlation between H2 and CH4 in the HAKUREI plume gives a H2/CH4 ratio of the HAKUREI fluid of more than 0.022. The estimated H2/CH4 ratio in the HAKUREI fluid is significantly higher than that of the JADE fluid, comparable with those of fluids venting at other sediment-related hydrothermal systems, and also comparable with those of thermogenic gases produced by hydrothermal sediment experiments. These facts suggest that fluid-sediment interaction during fluid upwelling appears to modify gas geochemical characteristics at the HAKUREI site but have little influence at the JADE site. This study demonstrates the availability of the Izena Cauldron hydrothermal field and the HAKUREI and JADE sites as a natural laboratory for investigating the fluid-sediment interaction during fluid upwelling.
2 0 0 0 OA 教育施設から発生する音
- 著者
- 西川 嘉雄
- 出版者
- 一般社団法人 日本音響学会
- 雑誌
- 日本音響学会誌 (ISSN:03694232)
- 巻号頁・発行日
- vol.76, no.8, pp.444-449, 2020-08-01 (Released:2021-02-01)
- 参考文献数
- 12