1 0 0 0 OA 皇居の内濠より得られた原生動物,輪虫類,鰓脚類および橈脚類.II.
The micro-organisms in 35 samples obtained from inside moats of the Imperial Palace of Japan in Tokyo during the years 2000-2004 were studied, and only the additional species unrecorded in the previous survey during the years 1996-1999 are enumerated. They are 49 species of 35 genera, viz. 10 species of 8 genera in the Protozoa (8 species of Rhizopoda, and 2 species of Chiliatea), 22 species (including variety and forma) of 12 genera in the Rotatoria, 1 species of the Gastrotricha, 1 species of the Nematoda, 15 species of 13 genera in the Arthropoda (13 species of Crustacea, and 2 species of Insecta). In 20 samples obtained in the previous survey, 81 species of 40 genera were recorded (Tanaka & Takeda, 2000), although the nematod worms and insect larvae were not examined. As a result, at present, the micro-organisms are known by a total of 130 species of 63 genera from four inside moats, Kami-dokan-bori, Naka-dokan-bori, Shimo-dokan-bori and Hasuike-bori, and from a small pond, Hisago-ike. Comparing the limnological fauna of the inside moats of the Imperial Palace of Japan with that of some ponds in the Akasaka Imperial Gardens in Tokyo recorded by Tanaka et al. (2005), it is definitely said that the inside moats of the Imperial Palace of Japan are still kept in good condition due to its large scale, though the Imperial Palace of Japan is surrounded by artificial buildings in Metropolitan Tokyo.
1 0 0 0 高輝度・高精細面放電型AC-DPDの開発
- 著者
- 原田 茂樹 岩田 明彦 田中 正明
- 出版者
- 一般社団法人映像情報メディア学会
- 雑誌
- 映像情報メディア学会技術報告 (ISSN:13426893)
- 巻号頁・発行日
- vol.21, no.10, pp.59-63, 1997-02-13
- 被引用文献数
- 1
40インチを超かる高精細AC-PDPの開発を行っている。一般にPDPの解像度を上げると維持電極幅が狭くなるため、輝度が減少する。輝度が減少しないように維持電極幅を広くすると隣接ラインのとの距離が狭まり、隣接ラインとの間で放電が生じ、維持電圧マージンが急激に減少する。我々は、この現象が維持電圧バルスの波形条件に強く依存していることを見出し、維持電圧パルスを制御することによって、隣接ラインとの誤放電を防いだ。