著者
平野 弘道 佐野 弘好
出版者
日本古生物学会
雑誌
日本古生物学會報告・紀事 新編 (ISSN:00310204)
巻号頁・発行日
vol.1977, no.106, pp.100-105, 1977

熊本県八代郡東陽村美生からは, かって赤津健によりアンモナイト3個が採集され, 松本達郎により当地域に中部ジュラ系の存在することが示唆されていた。最近, 佐野は当該地域の調査を行い, 問題とされていた地層の分布範囲と層序を明らかにした。また新たにベレムナイト1個が得られた。これの化石はいずれも断片的ではあるが, 検討の結果アンモナイトの1個はCadomites sp., 他の1個はPlanisphinctes? sp.と鑑定された。ベレムナイトはジェレツキー博士の鑑定によりParahastites ? sp.といえる。以上の三者の共通の生存期間は中期ジュラ紀であり, 調査された地層の主部は中部ジュラ系を含むと考えられる。得られた化石の保存はよくないが, 化石産出層の岩相及び構造上の位置をあわせ考えると地史考察上貴重な資料となるので, 図示し記載した。
著者
平野 敏彦
出版者
広島大学法学会
雑誌
広島法学 (ISSN:03865010)
巻号頁・発行日
vol.15, no.3, pp.p281-307, 1992-01
著者
平野 洋一
出版者
社団法人 プラズマ・核融合学会
雑誌
プラズマ・核融合学会誌 = Journal of plasma and fusion research (ISSN:09187928)
巻号頁・発行日
vol.75, no.5, pp.614-630, 1999-05
参考文献数
60
被引用文献数
9 9

Recent results of confinement studies and attempts to improve the confinement in reversed field pinch plasmas (RFP) are reviewed. Several scaling studies of RFP energy confinement time are summarized and the values of the confinement time of RFPs are compared with ITER−89P L-mode scaling. A new scaling law recently proposed is also described. Results of transport studies in RFPs are summarized and it is shown that the stochasticity of magnetic field lines caused by the magnetic fluctuations of dynamo action probably plays a dominant role in the core of RFP plasma. Recent Lundquist number scaling study for magnetic fluctuations is also described. Promising experimental and simulation results are introduced which are conducted to improve the RFP confinement. For examples, five-hold improvement of the energy confinement time is obtained in MST by driving the poloidal current in outer region with the pulsed poloidal current drive (PPCD). The increase of poloidal beta up to 20% is obtained in the Improved High Theta Mode in TPE−1RM20. Improved confinement by a flow shear is also observed in RFPs as in tokamaks and helical systems. Finally experimental and computational results are described which may indicate the bifurcation from the dynamo with multiple helical magnetic fluctuations to that with a single helical fluctuation through the increase of Prandtl number. In the case with a single helical fluctuation, the stochastic region caused by the over-lapping of magnetic islands can be reduced and the confinement degradation by the stochasticity of magnetic field lines may be avoided.
著者
福田 正己 町村 尚 平野 高司
出版者
北海道大学
雑誌
基盤研究(S)
巻号頁・発行日
2002

現地観測の結果東シベリアヤクーツクのタイガ内に攪乱と不攪乱個所のキャノピーを超える観測タワーを設置し、水・熱・二酸化炭素収支の連続モニタリングを行った。そのための機器(CO2/H2Oアナライザー、超音波風速計、土壌水分計)を用いた。毎年4月末に現地入りし、2本のタワーを設置して10月までの連続観測を実施した。更にオープントップチャンバー法により土壌呼吸の連続観測を行った。永久凍土融解過程をモニタリングするために、対象サイトでボーリング調査を毎年実施した。伐採前にはNEPとして86mg/m2・dayの二酸化炭素が森林に吸収されていた。しかし伐採後には日射の増加で地中温度が上昇し、土壌中の有機物分解が促進されて大気側への二酸化炭素の放出に転じた。更に撹乱で地表面での熱収支バランスが乱れ、永久凍土の上部での融解が進行した。その結果地中への伝達熱が増加し永久凍土は約10%より深くまで融解した。こうした融解では上部に含まれるメタンガスの放出を促す。攪乱による温暖化の促進タイガの攪乱のおもな原因は森林火災である。本研究では森林火災の代わりに全面伐採による影響評価実験を行い、タワー観測・土壌呼吸観測・永久凍土融解観測を行った。それらの結果から地球温暖化へ多大の影響を与えることが明確になった。(1)火災時の直接的な二酸化炭素放出(2)火災後の土壌呼吸増加による二酸化炭素の放出(火災後数十年間)(3)火災跡地での凍土融解によるメタンガス放出(火災後数百年間)いずれも地球温暖化を加速させる効果となる。
著者
平野 伸夫 竹之下 愛 土屋 範芳
出版者
一般社団法人 日本鉱物科学会
雑誌
岩石鉱物科学 (ISSN:1345630X)
巻号頁・発行日
vol.38, no.5, pp.198-207, 2009-09-30
参考文献数
28
被引用文献数
1 2

&nbsp;&nbsp;Carbonate hot spring is a natural chemical reaction field for understanding CO<sub>2</sub> geological sequestration as a natural analogue. Natural analogue studies are particularly important to understand the kinetics of mineral precipitation which has potential difficulties in experimental investigations. Carbonate sinter is frequently formed in and around carbonate hot spring, which can be suitable to elucidate mechanisms of carbonate precipitation associated with flushing CO<sub>2</sub>.<br> &nbsp;&nbsp;Oku-Okuhachikuro hot spring, located in Kosaka town, Akita Prefecture, NE Japan, is an artificial hot spring after drilling of exploration for the Kuroko-deposits, and it is still active where carbonate sinter has still been forming continuously for more than thirty years after drilling. The temperature of spring water is 44 &deg;C and water pH is 6.2, with discharge rate of 0.08 m<sup>3</sup>/min. The average chemical compositions of sinter correspond about 80 wt% CaCO<sub>3</sub>, and 4 wt% Fe<sub>2</sub>O<sub>3</sub>, associated with minor (<1 wt% each) SiO<sub>2</sub>, MnO, MgO, Na<sub>2</sub>O and K<sub>2</sub>O. Carbonate sinter is mainly composed of aragonite with a small amount of calcite; an intimate occurrence of these two forms of CaCO<sub>3</sub> is the most characteristic feature of this locality. However, mineral assemblage, texture and structure of carbonate sinter are different in relation to the distance from the blowout point. Near the blowout point, the sinter is well solidified and shows laminar structure having both of calcite and aragonite. Thickness of Ca-rich laminar ranges from 20 to 150 &mu;m and Fe-rich one is from 10 to 80 &mu;m. Calcite and aragonite assemblage is mainly observed in Ca-rich layer. The Fe-rich layer, however, is composed only of aragonite. The sinter along downstream becomes porous and is monomineralic having aragonite as CaCO<sub>3</sub>. The observed relations on the special distribution of aragonite/calcite and the possible stability relations of these phases through EPMA and TG-DTA analyses suggest an importance of minor elements (Fe, <i>etc.</i>) in the precipitation of metastable carbonates: this possible effect of the precipitation of metastable phases should be taken into account in the consideration of geochemical processes of CO<sub>2</sub> mineral trapping.<br>
著者
金児 正史 成川 公昭 宮口 智成 平野 康之 Masafumi KANEKO Kimiaki NARUKAWA Tomoshige MIYAGUCHI Yasuyuki HIRANO
出版者
鳴門教育大学
雑誌
鳴門教育大学研究紀要 = Research bulletin of Naruto University of Education (ISSN:18807194)
巻号頁・発行日
vol.34, pp.97-108, 2019-03-11

We have taken a class on an isoperimetric problem for lower secondary school students who have high motivation to mathematics. In this paper, we have considered the lesson plan on an isoperimetric problem for the students and decided the goal of this class is to prove the theorem as below. 'A polygon which has the biggest area with same constant perimeter is a regular polygon.' After the class on an isoperimetric problem, we have realized the goal of isoperimetric problem for lower secondary school students will be suitable and have recognized strongly the mathematical experiments will be an important impact for this class.

1 0 0 0 OA 近代戦の正体

著者
平野零児 著
出版者
六人社
巻号頁・発行日
1937
著者
江口 晴輝 平野 敏行 佐藤 文俊
出版者
東京大学生産技術研究所
雑誌
生産研究 (ISSN:0037105X)
巻号頁・発行日
vol.71, no.4, pp.769-773, 2019-07-01 (Released:2019-07-31)
参考文献数
21

本研究では複雑なタンパク質カノニカル分子軌道を雲状表示により効果的に可視化する方法を提案した.棄却法による軌道の値に応じた密度の点描を行い,タンパク質の巨大分子軌道を雲状に表現することに成功した.また擬等値面表示を開発し,また点座標の値に応じた配色を行うことで折り重なる等値面の内部構造を可視化した.本方法では表示する分子軌道の値に幅を持たせることが可能であるため,軌道の分布を情報の抜け落ちが少ない状態で可視化することができ,タンパク質の複雑な軌道の分析に適していると考えられる.
著者
鈴木 由希子 稲富 雄一郎 米原 敏郎 平野 照之
出版者
日本神経学会
雑誌
臨床神経学 (ISSN:0009918X)
巻号頁・発行日
vol.55, no.1, pp.8-12, 2015 (Released:2015-01-19)
参考文献数
5
被引用文献数
2 5

症例は77歳の女性である.パソコンのキーボード入力操作においてタッチタイピング(ブラインドタッチ)を獲得していたが,左中大脳動脈領域の脳梗塞を発症した.右前頭葉には陳旧性脳梗塞をみとめた.軽度の右麻痺,喚語困難,仮名・漢字・アルファベット1文字の読み書き障害は急速に改善したが,キーボード入力が困難になった.失行や視知覚障害はなく,ローマ字の読み書き障害をみとめた.アルファベットをみて確認しながらであればキーボード入力ができるまで改善したが,タッチタイピングは再獲得できなかった.本例のキーボード入力操作に選択的な行為障害には,ローマ字の読み書き障害がもっとも影響していると考えた.
著者
大塚 攻 平野 勝士 宮川 千裕 近藤 裕介 菅谷 恵美 中井 敏博 高田 健太郎 福島 英登 大場 裕一 三本木 至宏 浅川 学 西川 淳
出版者
日本プランクトン学会
雑誌
日本プランクトン学会報 (ISSN:03878961)
巻号頁・発行日
vol.66, no.2, pp.86-100, 2019-08-25 (Released:2019-09-03)
参考文献数
94

In marine ecosystems, bacterial interactions with zooplankters are highly complex, and much attention has recently been given to these interactions. Bacteria not only play the role of food and symbionts for zooplankters, but also function as decomposers for their carcasses, exuviae and feces. Free-living bacteria are involved as major producers in microbial loops, and form the diet of nanoplanktonic flagellates, ciliates, appendicularians and thaliaceans. Epibiotic and enteric bacteria use zooplankters as refuges to avoid predation and/or as food sources. However, aggregations of epibiotic bacteria or biofilms may function as “a second skin,” sensu Wahl et al. (2012), to modulate hosts metabolism and behaviors. Because they contain rich nutrients, low pH and low oxygen, copepod guts provide a unique environment for bacteria in which anaerobes can survive. Bacterial communities on copepods vary seasonally and among species, depending on the physiology of the host. The conveyor-belt hypothesis implies that bacteria vertically, and presumably horizontally, hitchhike in different water masses in accordance with the migrations of zooplankters. Bioluminescent bacteria are likely used as biomarkers of detrital foods for some planktonic copepods belonging to the Bradfordian families and as obligate symbionts for bioluminescent ichthyoplankters. Tetrodotoxin-producing bacteria are associated with chaetognaths that may use toxins to capture prey animals. Colonial cyanobacteria provide substrata for miraciid harpacticoid copepods. Hyrdomedusae play a role as vectors of pathogenic bacteria, causing lesions in farmed fish. Modern genetic analysis is a powerful tool that will be the first step in revealing the physiological and functional interactions between bacteria and zooplankton.
著者
財城 真寿美 三上 岳彦 平野 淳平 Michael GROSSMAN 久保田 尚之 塚原 東吾
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.127, no.4, pp.447-455, 2018-08-25 (Released:2018-10-05)
参考文献数
14
被引用文献数
4

Past meteorological records are important for improving our understanding of past, present, and future climates. Imaging and digitization of historical paper-based instrumental meteorological records must be carried out before these records are lost to decay. This kind of activity called “data rescue” is now taking place at many institutions around the world. A data rescue project is underway to preserve Japanese instrumental meteorological records from the 19th century. These data were collected by foreign residents and visitors, Japanese scientists influenced by Dutch science, and by Japanese merchants. Recently, meteorological measurements taken at Mito from 1852 to 1868, and at Yokohama in 1872 and 1873 have been found. Based on instrumental records collected through this data rescue project, a warmer climate in the 1840s and 1850s around the South-eastern Kanto Region has been identified. Large year-to-year variations of winter temperatures have also been detected.
著者
後藤 富朗 大野 永貴 平野 智 桜井 優
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誌 (ISSN:13426907)
巻号頁・発行日
vol.64, no.11, pp.1647-1654, 2010-11-01 (Released:2011-02-01)
参考文献数
20
被引用文献数
1

In accordance with the recent improvement in the quality of image displays, digital image compression artifacts are more visible than ever. Moreover, a lot of studies have been done to remove the artifacts such as blocky noise and mosquito noise. Among them, the total variation (TV) regularization approach proposed by Alter is considered to be one of the most successful. In this approach, the TV is regularized under constrained conditions, making it possible to efficiently remove the artifacts included by quantizing DCT coefficients.In this paper, unlike Alter's approach, an image is decomposed into a structure component and a texture component using the ROF TV regularization, and blocky noise and mosquito noise are moved in the texture component. Then, by filtering it using the deblocking edge filter, blocky noise can be removed. Furthermore, by controlling the selective filters using edge information obtained from the structure component, mosquito noise can be removed. Also, the reconstructed image is obtained to compose a filtered texture component and a structure component. An advantage the proposed method has over Alter's approach is it removes the artifacts without removing small texture signals. The experimental results show that the proposed method produces fine images subjectively and objectively. Also, the proposed method can be applied for not only JPEG-compressed images but also DCT-based compressed images such as MPEG and H.264.