著者
黒木 義彦 高橋 春男 日下部 正宏 山越 憲一
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.67, no.8, pp.J340-J346, 2013 (Released:2013-07-25)
参考文献数
10

The human electroencephalographic (EEG) spectra when looking at the stimuli of a real motion image and motion images at 60- and 240-fps were investigated. The EEG spectra in response to the 240fps stimuli showed a greater level of similarity to those of the real motion image stimuli than to those in response to the 60fps stimuli. This high frame rate image is considered to provide perceptions of motion image quality which are close to the impression gained when looking at real world scenes.
著者
小菅 正太郎 徳永 義郎 和田 悦洋 伊藤 勇 高橋 春男
出版者
昭和大学学士会
雑誌
昭和学士会雑誌 (ISSN:2187719X)
巻号頁・発行日
vol.74, no.2, pp.211-215, 2014

目的:イエロー着色アクリル眼内レンズ(IOL)のAN6K(KOWA社)は超音波乳化吸引術およびIOL挿入術において,術後屈折度がメーカー推奨A定数による予想屈折度よりも近視側にずれる.同レンズに対するA定数を算出した報告は未だ無く,今回AN6Kの当院パーソナルA定数を算出し検討を行った.対象:2008年7月より2009年4月までにAN6Kを嚢内に挿入後2か月以上経過観察し,超音波Aモード法およびIOLマスター<sup>TM</sup>の両方で眼軸長測定可能であり,その結果が22.0mm以上24.5mm未満の標準眼軸長眼で角膜乱視2D以内,矯正視力0.8以上を得られた46症例69眼.手術は複数の術者が施行し,IOL度数の計算式はSRK/T式を使用した.結果:術後屈折誤差(平均±標準偏差)はAモード法-0.41±0.57D,IOLマスター-0.58±0.53Dであった.Aモード法でのメーカー推奨A定数は118.7に対し,今回算出した当院パーソナルA定数は平均118.5であった.IOLマスター用A定数は119.5に対し,今症例での当院パーソナルA定数は平均119.2であった.IOLマスターにおいて,メーカー推奨A定数に比べ当院パーソナルA定数は統計学的に有意に少ない値であった.結論:メーカー推奨A定数を使用した場合の術後屈折誤差は近視化を認めた.
著者
白井 俊明 浜田 修一 高橋 春男 猿山 一郎
出版者
新潮社
雑誌
日本化學雜誌 (ISSN:03695387)
巻号頁・発行日
vol.86, no.2, pp.196-200, 1965

足尾鉱山で採取した黄銅鉱,黄鉄鉱および鉄閃亜鉛鉱中の微量セレンと銅,鉄,鉛,亜鉛およびカドミウムを分析し,セレン量と金属元素との関係を求めた。試料中のセレンは黄銅鉱で98.4~380.6ppm,黄鉄鉱で15.0および31.3ppm,また鉄閃亜鉛鉱では50.3および199.4ppmであった。鉄閃亜鉛鉱では黄銅鉱より早期晶出のより高温生成のものには黄銅鉱より後期晶出のより低温生成のものにくらべてセレン量が多いことがわかった。また足尾鉱山で採取した黄銅鉱には他の鉱山の黄銅鉱と比較してセレン量が多かった。分析値から計算された各試料中の純粋に近い黄銅鉱に含まれるセレンのモル百分率は2.98~13.46&times;10<sup>-2</sup>であって一定値を示さず,またセレンモル百分率と鉛,亜鉛およびカドミウム含有量との間にも相関関係は見いだされなかった。これは鉱液の不連続鉱化によるものと思われる。
著者
森本 良平 小坂 丈予 羽鳥 徳太郎 井筒屋 貞勝 浦部 和順 高橋 春男 岡田 義光 平林 順一 伊佐 喬三 磯部 宏
出版者
Tokyo Geographical Society
雑誌
地学雑誌 (ISSN:0022135X)
巻号頁・発行日
vol.77, no.5, pp.255-283, 1968-10-25 (Released:2009-11-12)
参考文献数
25
被引用文献数
3 3

Unusual uplift of the land was found about an insular active volcano Iwo-jima, Ogasawara archipelago, 1, 200 km south of Tokyo. Remarkable retreat of shore line was revealed by reviewing topographic maps and aerophotographs of the island. Some upward movements of the island are to be one of the most principal reasons of the retreat. As the clear evidences of the upheaval of the land, following phenomena were observed by the writers who investigated the island five times from 4th July to 23rd August 1968 : a) Sunken vessels and a landing craft have emerged on the western coastal beach of the island : b) Faults and cracks appeared on the abandoned run-way of the former Japanese Navy in the central part of the island ; c) Coastal reef emerged on the sea to connect off shore islet with the island ; d) New coastal terraces were formed on the sand beaches ; e) Fresh living corals were exposed on the sea.Results of the investigations are enumerated as follows : 1) About 8 m upheaval of the land since 1953-4 was revealed by levelling survey at the western coast of the island. 2) Amount of uplift observed on the above-mentioned run-way is smaller in its central part than in both terminals, maximum vertical displacement of the fault being 3 m. 3) Tide gauge installed at the western rocky coastrecorded slight relative down of sea level but further observation should be continued without disturbance by typhoon to obtain more reliable data. 4) No expected microseisms were recorded on the high sensitive electro-magnetic seismographs except 2 or 3 per day. 5) Temperature of the fumarolic gases were 95-123°C, 10-25°C higher than that observed in 1935. In spite of the rise in temperature, gases of so called high temperature type, such as sulphur dioxide and halogens, were not contained. 6) Composition of the sublimates also accords with these results of chemical analyses of the gases. 7) Content of each main component element and its ratio to other ones is quite variable in several hot springs whose pH values range from 2.1 to 6.8. 8) Analcite was identified by X-ray and DTA analyses in the tuff forming Moto-yama, an eastern main flat cone of the island. Genetic condition of the mineral inferred from its chemical composition may indicate submarine eruption of the volcano. 9) Three weak zones were recognized by the present investigations in addition to the two ones previously reported by Tsuya. Thus three are arranged radially through the center of the eastern main cone and the two are arranged concentrically around the foot of the same cone. From these weak zones phreatic explosions are expected in future, if they occur. 10) Nothing more than mere weak phreatic explosion was recorded through the historic activity of the volcano. Artificial filling up of the vent, such as the pavement of the surface often causes the small explosion at fumarole. 11) Submarine eruption recently found at the sea bottom, about 5.4 km NNE of the South Sulphur Island, about 50 km south of the island did not occur recently but must have repeated rather stationarily.According to the present investigations, no remarkable magmatic explosion could be expected except those small phreatic ones, same one of which has often occurred on the island. Chemical composition of the gases does not indicate any approach of hot magma to the surface.
著者
佐藤 純 中村 利廣 菅原 伸一 高橋 春男 佐藤 和郎
出版者
特定非営利活動法人 日本火山学会
雑誌
火山.第2集 (ISSN:24330590)
巻号頁・発行日
vol.34, no.1, pp.19-39, 1989-04-10 (Released:2018-01-15)

Chemical analysis for major and minor elements was performed on the pumice fall deposit, essential blocks from the two pyroclastic flow deposits and the lava flow, erupted in succession during the 1783 (Temmei) volcanic activity on Mt. Asama. The pumice samples representing a vertical column exhibit no remarkable trend of chemical variation with time. The analytical results for the lava flow show small spatial variation in K, Mg, Sr and some other elements. Further inspection of the data for all the samples indicates that Fe, Na, Ti, Sr, Cu, Co and Ni tend to increase with time throughout the whole eruptive sequence. A plot of Sr/(SiO2 + K2O) vs. (Fe2O*3+K2O)/(SiO2+K2O) illustrates that the erupting magma became progressively more mafic and more enriched in Sr during the activity. This type of plot, combined with the spatial distribution of certain elements superimposed on the distribution pattern of the lava flow, reveals that, during the lava eruption, the composition of erupting magma still shifted to slightly mafic.
著者
福田(日原) 桂 伊與田 雅之 齋藤 友広 荒井(布田) 典子 和田 幸寛 鈴木 幸恵 木崎 順一郎 恩田 秀寿 高橋 春男 柴田 孝則
出版者
一般社団法人 日本透析医学会
雑誌
日本透析医学会雑誌 (ISSN:13403451)
巻号頁・発行日
vol.51, no.6, pp.379-385, 2018 (Released:2018-06-28)
参考文献数
22

症例は30歳代の女性. 4日前から右眼球運動痛, 右歪視症, 右眼下方視野狭窄を認め, 近医を受診した. 同日夜間から右眼の急速な視力低下がみられ, 指数弁まで低下した. 血液検査では抗アクアポリン4 (aquaporin-4: AQP4) 抗体陽性, 眼窩造影MRIにて右視神経に高信号を認め, 視神経脊髄炎関連疾患, 中でも抗AQP4抗体陽性視神経炎と診断した. 近医にてステロイドパルス療法を2クール施行, 後療法としてプレドニゾロン40mg/日の内服を開始したが, 視力, 視野の改善は得られず, 血漿交換療法施行目的に当院転院となった. 計7回の二重膜濾過血漿交換 (double filtration plasmapheresis: DFPP) を施行し, 抗AQP4抗体は陰性化, 視力改善, 視野の拡大を認めた. DFPPはステロイド治療抵抗性の抗AQP4抗体陽性視神経炎に有用な治療法の一つであると考えられた.