著者
山本 純之 磯﨑 行雄
出版者
公益社団法人 東京地学協会
雑誌
地学雑誌 (ISSN:0022135X)
巻号頁・発行日
vol.122, no.5, pp.791-806, 2013-10-25 (Released:2013-10-31)
参考文献数
86

Ever since the term stromatolith was first coined by Kalkowsky in 1908, research studies on stromatolites have continued for more than a century. This article reviews the study history of living and fossil stromatotelites. The history is divided into two parts by the discovery in 1961 by Logan of living stromatolites in Shark Bay, Western Australia, because this determined the subsequent main trend of studies on both living and fossil stromatolites. Major contributions during the last three decades include documentation of (1) a worldwide bloom of stromatolites in Proterozoic low-middle lateral shallow seas, and (2) oxygen-producing cyanobacterial activity related to stromatolites from the 1990s, resulting in various new aspects being clarified, which include in-vitro cultivation gradually revealing cyanobacterial calcification and dome-formation. Future studies will be directed towards reconciling morphological disparities and formation mechanisms among fossil, living, and cultured stromatolites.
著者
山本 純之 磯﨑 行雄
出版者
公益社団法人 東京地学協会
雑誌
地學雜誌 (ISSN:0022135X)
巻号頁・発行日
vol.122, no.5, pp.791-806, 2013

&emsp;Ever since the term stromatolith was first coined by Kalkowsky in 1908, research studies on stromatolites have continued for more than a century. This article reviews the study history of living and fossil stromatotelites. The history is divided into two parts by the discovery in 1961 by Logan of living stromatolites in Shark Bay, Western Australia, because this determined the subsequent main trend of studies on both living and fossil stromatolites. Major contributions during the last three decades include documentation of (1) a worldwide bloom of stromatolites in Proterozoic low-middle lateral shallow seas, and (2) oxygen-producing cyanobacterial activity related to stromatolites from the 1990s, resulting in various new aspects being clarified, which include <i>in-vitro</i> cultivation gradually revealing cyanobacterial calcification and dome-formation. Future studies will be directed towards reconciling morphological disparities and formation mechanisms among fossil, living, and cultured stromatolites.
著者
岡山 貴史 山本 純之 木村 匡臣 松野 裕
出版者
公益社団法人 土木学会
雑誌
AI・データサイエンス論文集 (ISSN:24359262)
巻号頁・発行日
vol.4, no.3, pp.46-53, 2023 (Released:2023-11-14)
参考文献数
23

カキの優良産地である奈良県五條吉野地域では,収穫時期の半年前頃より収穫作業の労働力確保として短期雇用の計画を始めている.また,地球温暖化の影響で経験則による収穫時期の予測が困難になっているため,新たな予測手法が求められている.本研究では,ANNを用いて気象データからカキの収穫最盛日予測を行った.対象品種は,地域の主力品種’刀根早生’,’平核無’,’富有’の3品種とした.モデルのパラーメータを検討し,品種ごとにモデルを構築した.結果は誤差が最大3日のモデルが構築された.また,3品種とも10月以降に収穫されるが,5月1日と6月1日時点では最大で2.5日の誤差であり,収穫直前までの各月1日時点での誤差は最大3日で予測可能となり,収穫時期の予測手法としてANNの適応可能性が示された.