著者

阪井 和男

出版者

一般社団法人 電子情報通信学会

雑誌

電子情報通信学会 基礎・境界ソサイエティ Fundamentals Review (ISSN:18820875)

巻号頁・発行日

vol.7, no.2, pp.149b, 2013-10-01 (Released:2013-10-01)

著者

亀甲 武志 岡本 晴夫 氏家 宗二 石崎 大介 臼杵 崇広 根本 守仁 三枝 仁 甲斐 嘉晃 藤岡 康弘

出版者

日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.61, no.1, pp.1-8, 2014-04-25 (Released:2016-05-22)

参考文献数

24

被引用文献数

1

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To clarify the reproductive ecology of the endangered cyprinid Honmoroko, Gnathopogon caerulescens, endemic to Lake Biwa, the occurrence of eggs in inlets, sex ratio and monthly changes in gonad somatic indices (GSI) were investigated in the Nishinoko lagoon, adjacent to Lake Biwa, from March to May, 2012. Eggs of Honmoroko were found on gravel and vegetation in two inlets, suggesting that not only the reed zone of Lake Biwa and its lagoons but also inlets of the lagoons are important spawning habitats of that species. The sex ratios of individuals collected in the two inlets were more malebiased (11.2–32.1 : 1) than that in the reed zone of the lagoon (1.5–2.7 : 1). The GSI of males gradually decreased as the breeding season progressed, those of females not showing any significant statistical changes, except for individuals collected around the reed zone and inlet in April. It was concluded that males remain in inlets and the reed zone during spawning, whereas females migrate to the inlets only for spawning, subsequently returning to the reed zone until the next spawning session.

著者

細田 尚

出版者

日本混相流学会

雑誌

混相流 (ISSN:09142843)

巻号頁・発行日

vol.23, no.4, pp.412-419, 2009-12-15 (Released:2010-06-23)

参考文献数

9

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It is an increasing concern that the depletion of dissolved oxygen (DO) concentration at the bottom layer of the northern-part of Lake Biwa with 100m in maximum depth has been worsen in recent years not only due to eutrophication in water but also the effects of global warming such as the raise of air temperature during winter. Many research have been carried out by various organizations to clarify the mechanism of DO depletion near the lake bottom and to propose the countermeasures. This article firstly describes the seasonal variations of the vertical water temperature and water quality distributions to explain the fundamental features of heat and mass transfer occurring in the northern part of Lake Biwa throughout the year. Since it is well known that the thermal convection during the cooling period is the main mechanism of DO transfer from the surface to the lake bottom, the mixing processes caused by thermal convection are shown using the results of a 3D CFD simulation. Then, the electrolysis of water at the lake bottom for the restoration and DO recovery is introduced as one of the countermeasures proposed by Lake Biwa Environmental Research Institute, Shiga Prefecture. The simulation results of O2 bubble plumes with the dissolution into lake water are also shown under the conditions of laboratory and field experiments.

著者

Taketo Kojima Ikumi Kawajiri Jun-ichi Nishida Chitoshi Kitamura Hiroyuki Kurata Mirai Tanaka Hiroshi Ikeda Takeshi Kawase

出版者

(社)日本化学会

雑誌

Bulletin of the Chemical Society of Japan (ISSN:00092673)

巻号頁・発行日

pp.20160093, (Released:2016-05-24)

被引用文献数

8

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A series of 2,3-diphenylphenanthro[9,10-b]furans were prepared by the reactions of phenanthrene-9,10-dione with two equivalents of benzylidenetriphenylphosphoranes as a key step. The bis(4-bromophenyl) derivative can be readily lithiated by the action of n-butyllithium in diethyl ether. The corresponding 4-trimethylsilyl and 4-methylthio derivatives were obtained by quenching the dilithio derivative with trimethylsilyl chloride and dimethyl disulfide, respectively. The Buchwald–Hartwig amination of the bromide with diphenylamine afforded the diphenylamino derivative in a good yield. Crystallographic analysis of the parent diphenyl derivative reveals that the phenanthrofuran moiety has a slightly twisted helicene-like structure, and the compound forms a columnar stacking in the crystal. The phenanthrofurans display intense blue fluorescence both in CH2Cl2 and in the solid state. Their electrochemical properties obviously indicate high HOMO energy levels of the furans, as predicted by the density functional theory calculations.

著者

馬場 一彦

出版者

公益社団法人 日本油化学会

雑誌

オレオサイエンス (ISSN:13458949)

巻号頁・発行日

vol.10, no.1, pp.15-18, 2010-01-01 (Released:2013-06-01)

参考文献数

9

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抗がん剤新薬の開発が困難になっているなか, 既存の抗がん剤にドラッグデリバリー技術を適用して, 有効性を高め, 副作用を低減する開発研究が積極的になされている。すでにLHRHアナログやドキソルビシン塩酸塩リボソーム製剤はがん治療の標準的ガイドラインに採用されている。また, 既存の抗がん剤の利便性を改善した製剤として, アルブミン結合型パクリタキセルナノ粒子製剤も上市されている。本稿では, これらのDDS製剤の物理化学的および臨床面での特徴を紹介する。

著者

ソシオロジ編集室

出版者

社会学研究会

雑誌

ソシオロジ (ISSN:05841380)

巻号頁・発行日

vol.49, no.1, pp.191-226, 2004-05-31 (Released:2016-05-25)

著者

Kenichi Sakakura Yousuke Taniguchi Mitsunari Matsumoto Hiroshi Wada Shin-ichi Momomura Hideo Fujita

出版者

一般社団法人 インターナショナル・ハート・ジャーナル刊行会

雑誌

International Heart Journal (ISSN:13492365)

巻号頁・発行日

pp.15-421, (Released:2016-05-09)

被引用文献数

20

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Rotational atherectomy to an angulated calcified lesion is always challenging. The risk of catastrophic complications such as a burr becoming stuck or vessel perforation is greater when the calcified lesion is angulated. We describe the case of an 83-year-old female suffering from unstable angina. Diagnostic coronary angiography revealed an angulated calcified lesion in the proximal segment of the right coronary artery. We performed rotational atherectomy to the lesion, but intentionally did not advance the rotational atherectomy burr beyond the top of the angulation. We controlled the rotational atherectomy burr and stopped it just before the top of the angulation to avoid complications. Following rotational atherectomy, balloon dilatation with a non-compliant balloon was performed, and drug-eluting stents were successfully deployed. In this manuscript, we provide a review of the literature on this topic, and discuss how rotational atherectomy to an angulated calcified lesion should be performed.

著者

Kenji HORIE Tomokazu HOKADA Yoichi MOTOYOSHI Kazuyuki SHIRAISHI Yoshikuni HIROI Mami TAKEHARA

出版者

Japan Association of Mineralogical Sciences

雑誌

Journal of Mineralogical and Petrological Sciences (ISSN:13456296)

巻号頁・発行日

vol.111, no.2, pp.104-117, 2016 (Released:2016-05-05)

参考文献数

50

被引用文献数

2 10

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U–Pb zircon geochronology was applied to nine metasedimentary samples collected from Mt. Yuzhnaya, Condon Hills, and Mt. Lira in the inland region of the Rayner Complex of western Enderby Land, East Antarctica, in order to define the eastern limits of the western Rayner Complex that underwent the Pan–African metamorphism and to evaluate potential source areas of metasedimentary rocks. Condon Hills and Mt. Lira revealed metamorphic ages of ~ 894 and ~ 934 Ma, respectively, which are consistent with previously reported metamorphism in association with Rayner Structural Episode (RSE). Mt. Yuzhnaya samples affected by the RSE contain zircon grains rejuvenated during 590–570 Ma, which indicates that the Pan–African reworking can be extended up to Mt. Yuzhnaya. On the other hand, the Condon Hills samples include Archean detritus, and the age peaks from 3850 to 2491 Ma are the oldest components in the Rayner Complex of western Enderby Land. There is no evidence of reworked Napier Complex rocks in the studied Rayner samples.

著者

嶋脇 聡 龍前 三郎 清水 優史

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.19, no.4, pp.280-281, 2000-08-30 (Released:2011-03-07)

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The flow downstream to a contraction in a tube with bleeding flow was investigated by numerical analysis. The bleeding flow was orthogonally induced with tube axis from circumferential entrance. In the analysis, axisymmetrical and laminar flow was assumed.The calculated results were analyzed with respect to the following three parameters.· ratio Qb/Q of bleeding flow rate Qb to that of flow from contraction Q. · relative position of reattachment point of stream from the contraction and bleeding point.· ratio d/D of diameter of the contraction d to that of down stream tube D. From the results, it was clarified that all these parameters had the influence on the flow downstream to the contraction and pressure loss caused by bleeding flow. The pressure loss by bleeding flow could be lowered by decreasing of Qb/Q, setting the bleeding point far downstream to the contraction, and by increasing of d/D. Moreover, by normalizing the dimension of settings by Reynolds number in the contraction, the similarities of flow and of pressure distribution alone the tube wall were shown.

著者

Motoko Fujino Eri Suzuki Mineo Watanabe Tetsuo Nakayama

出版者

国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2015.125, (Released:2015-08-07)

参考文献数

4

被引用文献数

7

著者

加藤 晶子 古野 邦雄 香川 淳 楠田 隆 風岡 修 酒井 豊 吉田 剛 山本 真理

出版者

一般社団法人 日本地質学会

雑誌

日本地質学会学術大会講演要旨 日本地質学会第118年学術大会・日本鉱物科学会2011年年会合同学術大会(水戸大会) (ISSN:13483935)

巻号頁・発行日

pp.305, 2011 (Released:2012-03-27)

参考文献数

1

著者

阿部 郁男 今村 文彦

出版者

公益社団法人 土木学会

雑誌

土木学会論文集B2(海岸工学) (ISSN:18842399)

巻号頁・発行日

vol.71, no.2, pp.I_1705-I_1710, 2015 (Released:2015-11-10)

参考文献数

13

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東日本大震災発生前より,リアルタイム津波予測の研究が行われている.それらの研究では,データベースによる予測とリアルタイムシミュレーションによる予測という2つの方法が検討されていた.そして大震災発生後には,リアルタイム測地データによる地盤変動の即時推定技術を津波予測に取り入れる研究も進められている.そこで,本研究では,これらの技術を併用することにより,PCなどの安価な計算機を利用した場合でも,避難に役立つ精度の高い津波浸水予測を得ることができる手法を検討した.東日本大震災での事例を用いて4つの研究対象地域を選択し,地震発生後10分で得られる浸水予測情報を具体的に示した.さらに,浸水範囲や浸水高の実測値と比較することにより,本研究で提案した予測手法の精度の確認を行うことができた.

著者

斎藤 英二 井口 正人 松島 喜雄

出版者

国立研究開発法人 産業技術総合研究所 地質調査総合センター

雑誌

地質調査研究報告 (ISSN:13464272)

巻号頁・発行日

vol.66, no.5-6, pp.103-141, 2015-10-16 (Released:2016-01-16)

参考文献数

19

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2014年8月3日に噴火した口永良部島(くちのえらぶじま)火山の山頂部に おいて,GPS連続観測を噴火直前までの約10年継続して行った.最も近接した観測点は火口までの距離が約230 mであるものの,噴火前1 ヶ月間の短期間に前兆を示す変位は捉えられなかった.しかし長期的にみると,全期間で4回,山頂域の膨張を示唆する変位を観測している.それぞれのイベントは数 cmの変位に数ヶ月かかる緩慢なものであるが,その変位は累積していった.初期のイベントは明瞭な地震の増加を伴ったが,後期になると地震活動の高まりはほとんど見られなくなった.イベントの間隔は次第に長くなるとともに,2009 年頃から長期的トレンドに加えて微少な変動が混在するようになり,この頃から変動のパターンが変化した.詳細な解析により,山頂部の変動は下部地盤の西変位の上に火口浅部の放射状の変動が重なることによって現れていることが明らかになった.2013年からは火口浅部の変動は,膨張からほとんど停止ないし収縮傾向に転じている.さらに山頂部の2観測点に共通の変動が観測されるようになったことから,山頂部のやや深い場所に別の変動源が現れた可能性がある.

著者

武村 雅之 諸井 孝文

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.53, no.3, pp.285-302, 2001-03-25 (Released:2010-03-11)

参考文献数

28

被引用文献数

4

著者

武村 雅之 野澤 貴

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.49, no.3, pp.375-387, 1996-11-23 (Released:2010-03-11)

参考文献数

13

被引用文献数

3

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Seismograms from the 1923 Kanto earthquake (M=7.9) and its aftershocks at the Yamagata observatory of JMA (The Japan Meteorological Agency) in Tohoku district, Japan, are examined. They were recorded by the Imamura-type strong motion seismograph. Horizontal-component records from the main shock and the 1924 Tanzawa earthquake (M=7.3), one of the largest aftershocks, are digitized and the instrumental characteristics of the seismographs are examined. Natural period To and damping ratio v of the instrument are evaluated to be 4.5s and 1.5 for both the NS and EW components from the free oscillation records and documents for the results of testing the instrumental response. The maximum displacement in EW component of 11.2cm is obtained for the main shock in the period range from 2 to 20s, after the instrument correction.On the other hand, uncertainties of the instrumental characteristics remain for the seismograms from the 1923 Kanto earthquake observed at the Mukaiyama observatory of the Tohoku Imperial University in Sendai, [TAKEMURA et al. (1995)]. The Sendai city is located about 40km east from the Yamagata city. The epicentral distance and azimuth of the Mukaiyama observatory is not so different from those of the Yamagata observatory for the 1923 Kanto earthquake. It is found that the displacement records at Sendai and Yamagata have mostly the same amplitude for the recent moderately large earthquakes with almost the same location of epicenter as the 1923 Kanto earthquake. All the records were observed by the strong motion displacement seismographs of To=6s and v=8 both at the Yamagata observatory and at the Sendai district meteorological observatory of JMA. This fact indicates that the displacement at the Mukaiyama observatory in Sendai ought to show almost the same amplitude as one at the Yamagata observatory during the 1923 Kanto earthquake. Then, we redetermined To of the instrument at Mukaiyama observatory so that the amplitude of the displacement after the instrument correction is the same as that at the Yamagata observatory. Redetermined To is 5s in EW component, being meaningfully longer than the results estimated by TAKEMURA et al. (1995).

著者

野澤 貴 武村 雅之

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.50, no.1, pp.11-20, 1997-05-28 (Released:2010-03-11)

参考文献数

12

被引用文献数

1

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Records observed at the Takada observatory by an Imamura's type strong motion seismograph are useful in Japan to investigate a source process of the 1923 Kanto earthquake (M=7.9). Ground motion in the vertical component is completely recorded to the end. Those in horizontal components are also recorded to the end, though the amplitudes of them are saturated in the midst of the records. The instrumental response of the seismograph has been already clarified by TAKEMURA and NOZAWA (1996), and many records from the recent earthquakes occurring near the focal region of the Kanto earthquake are also obtained at the same site with modern instruments. First, a crustal structure model from the source to the station is established so as to explain the dispersion characteristics of Love-waves observed for the recent earthquakes, and their records are simulated by the normal mode theory using the obtained structure to confirm its validity. Secondly, the records from the Kanto earthquake are reproduced using the same structure model. NOZAWA et al. (1995) proposed the two possible source models for the Kanto earthquake through the simulation of the records at the Gifu observatory. Two big subevents with a time interval of about 12s are assumed on the fault plane in both the models, while the focal mechanism and the focal depth of the second subevent are different between these models. It is found that these models similarly explain the records at the Takada observatory from the Kanto earthquake. The maximum displacements of the reproduced horizontal ground motions are estimated about 20cm in NS component. and about 10cm in EW component. These results are consistent with the fact that the amplitudes of the records in NS component are strongly saturated compared with those in EW component.

著者

野澤 貴 武村 雅之 池浦 友則 山中 浩明

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.48, no.3, pp.331-340, 1995-11-25 (Released:2010-03-11)

参考文献数

30

被引用文献数

1

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Records observed at Gifu observatory by an Imamura's type strong motion seismograph are one of the most useful records in Japan to investigate a source process of the 1923 Kanto earthquake (M=7.9). It is because amplitudes of the records are not saturated in EW and UD components, instrumental response of the seismograph has been clarified, and many records due to recent events occurred near the focal region of the Kanto earthquake have been obtained by more accurate seismographs at the same site. In the present study, a source process of the 1923 Kanto earthquake is elucidated through a simulation of the records using the normal mode theory in the period range from 2 to 20s. First, a crustal structure from the source to the station is estimated so as to explain dispersive characteristics of Love waves observed at Gifu observatory for the recent events, and their records are simulated to confirm a validity of the estimated crustal structure. Secondly, the records from the Kanto earthquake are simulated using the obtained crustal structure to deduce the source process of this event. According to KANAMORI (1971), a macroscopic faulting is a reverse right-lateral fault on a plane dipping 34° towards N20°E, whose slip has much strike component. If two big subevents with the same focal mechanism obtained by KANAMORI (1971) and with a time interval of about 12s are assumed on the fault plane, the observed records can be well explained. The first subevent is located under the Odawara city and the second one under the Miura Peninsula. The focal depth of the second event is 15 to 35km being deeper than that of the first event, which is 5 to 25km in depth. The seismic moments and the rise time are assumed 2.5×1027 dyne-cm and 5s for both the events respectively. On the other hand, if the focal mechanism of the second event is dip slip type, the observed records can be also explained well, even though the focal depth of the second subevent is the same as that of the first one. This model is consistent with a slip distribution on the fault plane obtained from geodetic data.

著者

武村 雅之 野澤 貴 池浦 友則

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.52, no.2, pp.317-333, 1999-10-20 (Released:2010-03-11)

参考文献数

30

被引用文献数

2

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Nozawa et al. (1995) proposed a source model with two big subevents of the same seismic moment for the 1923 Kanto earthquake (M=7.9), through the simulation of the records by the Imamura-type strong motion seismograph (displacementmeter) at Gifu observatory. This model was named Model I in the present study. The first subevent of Model I is located under the Odawara city, having a fault plane with the strike of N290°E and the rake angle of 162°. This fault has much strike slip component, which is consistent with the focal mechanism solution by KANAMORI (1971). However, the direction of the strike is not compatible with the trench axis of the Sagami trough. The second subevent occurring 12s after the first subevent is located under the Miura Peninsula. The fault of the second subevent, having much dip slip component, well explains the geodetic data. Recently, the seismograms by the Imamura-type strong motion seismographs at Sendai (Mukaiyama) observatory and Yamagata observatory were examined and the instrumental responses of the seismographs were revealed. Crustal structure from source to stations was estimated in the present study so as to explain the observed Love and Rayleigh waves at Sendai (JMA) and Yamagata observatories from the recent events occurring near the focal region of the 1923 Kanto earthquake. However, Model I failed to explain the records of the 1923 Kanto earthquake at Sendai (Mukaiyama) and Yamagata observatories, using the obtained crustal structure. Then, we revised Model I to explain these records, in consideration of the newly determined focal mechanism solution by Lallemant et al.. (1996) and iso-depth contour of the upper boundary of the Philippine Sea plate by Ishida (1992). The first subevent of the revised model (Model R) has a fault plane with the strike of N321°E and the rake angle of 128°, and the twice of seismic moment of the second subevent. The direction of the fault strike of the first subevent is parallel to the trench axis of the Sagami trough, while the fault plane of the second subevent is the same as Model I. Model R succeeded in explaining not only the records at Sendai (Mukaiyama) and Yamagata observatories but also those at Gifu observatory in the period range from 2 to 20s. This shows the fault model, being in agreement with the geometry of subduction zone along the Sagami trough, is better to explain the seismic records observed in Japan.

著者

小山 順二 武村 雅之 鈴木 次郎

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.33, no.2, pp.187-198, 1980-06-25 (Released:2010-03-11)

参考文献数

21

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A simple method is developed to determine seismic moments of earthquakes by using tabulated data in usual seismological bulletins. The method is qualified through the criteria such as simplicity of calculations, coverage of wide magnitude range, and insensitivity of the instrumental response: At first, characteristic period Tc of each earthquake is defined as the average value of apparent periods of wavelets which give maximum amplitudes of ground displacement at epicentral distances between 200 and 700km. Secondly, amplitude information is taken into consideration, making a product of maximum amplitude, its period and epicentral distance. Seismic-moment factor Me for a given earthquake is defined at the characteristic period Tc as the average value of those products evaluated from horizontal components at stations within epicentral distance range from 200 to 400km. The narrow range of epicentral distance in evaluating Me is taken so as to reduce the uncertainty due to seismic-energy attenuation into a permissible range and to be able to obtain equal number of observations for small earthquakes to that for large ones. The relation between the seismic-moment factors and characteristic periods for 163 intraplate earthquakes in Japan from 1926 to 1977 clearly demonstrates that Me is proportional to the cube of Tc. A scaling model of earthquakes that satisfies the empirical relations among surface-wave magnitude, JMA magnitude, and body-wave magnitude facilitates the estimate of static seismic-moments from calculated Me's. The seismic moments of 16 earthquakes determined by conventional analyses from near- and/or far-field observations are consistent with static seismic-moments thus estimated. This shows the potential in practice of the present method especially in routine processing of seismic data.

著者

小山 順二 武村 雅之

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.36, no.2, pp.255-257, 1983-06-25 (Released:2010-03-11)

参考文献数

10