著者

David J.A. Clines

出版者

Word Books

巻号頁・発行日

1989

著者

edited by Stephen A. Wurm Peter Mühlhäusler Darrell T. Tryon

出版者

Mouton de Gruyter

巻号頁・発行日

1996

著者

ウィリアム A. ワートマン著 松戸保子 [ほか] 訳

出版者

勁草書房

巻号頁・発行日

1994

著者

Akahira M. Shimizu A. Takeuchi K.

出版者

Università di Bologna

雑誌

Statistica (ISSN:19732201)

巻号頁・発行日

vol.65, no.4, pp.351-365, 2005

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In current physics experiments, there are many cases when the value of a parameter is theoretically assumed to be nonnegative or positive. In such cases, a combined Bayesian-frequentist approach to confidence intervals for a positive parameter is adopted in this paper, and the confidence intervals are constructed. Comparisons of the confidence intervals with ordinary and Bayesian ones are done in the normal cases.

著者

BADDELEY A.

雑誌

Neuropsychologia

巻号頁・発行日

vol.32, pp.53-68, 1994

被引用文献数

15 426

著者

edited by John M. Dillon and A.A. Long

出版者

University of California Press

巻号頁・発行日

1996

著者

Casey T. A. Sakakibara J. Thoroddsen S. T.

出版者

American Institute of Physics

雑誌

Physics of fluids (ISSN:10706631)

巻号頁・発行日

vol.25, no.2, pp.025102, 2013-02

被引用文献数

30 1

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We introduce a modified tomographic PIV technique using four high-speed videocameras and a scanning pulsed laser-volume. By rapidly illuminating adjacent subvolumesonto separate video frames, we can resolve a larger total volume of velocityvectors, while retaining good spatial resolution. We demonstrate this technique byperforming time-resolved measurements of the turbulent structure of a round jet,using up to 9 adjacent volume slices. In essence this technique resolves more velocityplanes in the depth direction by maintaining optimal particle image density andlimiting the number of ghost particles. The total measurement volumes contain between1 ×106 and 3 ×106 velocity vectors calculated from up to 1500 reconstructeddepthwise image planes, showing time-resolved evolution of the large-scale vorticalstructures for a turbulent jet of Re up to 10 000.

著者

A.V. エイホ [ほか] 共著 原田賢一訳

出版者

サイエンス社

巻号頁・発行日

2009

著者

ザヴアリツスキー A. N. 竹田 英夫

出版者

地学団体研究会

雑誌

地球科學 (ISSN:03666611)

巻号頁・発行日

no.39, pp.30-37, 1958-08-28

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他の地域と同様に,ウラル地方の黄鉄鉱鉱床は結晶片岩中に胚胎し,最も典型的な交代作用により生成された鉱床と考えられる.ウラルにおける調査研究の結果,母岩が変成し,一部結晶片岩化した一連の動力変成作用の時期よりも以前に,これらの鉱体は交代作用によって生成されたことが判明した.鉱体の構造および鉱物組成の点からみて,鉱体自身が相当の変成作用を受けている.構成鉱物の再配列およびある鉱物が他の鉱物によって交代されるという現象は変成条件の下においても生じている.故に,交代作用の面から,鉱石鉱物の交代作用が初生的(primary)であるとか,または変成作用によるものであるとかは,必ずしも結論出来ない.微弱な変成作用を受けた鉱床では,しばしばコロフォーム組織(colloform texture)が残っている.またごくわずかに変成された鉱体中には,初生の白鉄鉱と繊維亜鉛鉱が見出される.これらの特徴的な組織や鉱物はより高度に変成された鉱床中にはみられない.鉱体は結晶片岩の構造に調和した特徴的なレンズ状を呈しているが,この形態は変成作用の構造運動によって生じたものである.種々のウラルの黄鉄鉱鉱床にみられる差異は,そのほとんどが変成条件の差を反映したものであって,鉱床が最初沈積したときの差によるものではない.

著者

by R. A. Montgomery adapted by Mark Firth

出版者

McGraw-Hill

巻号頁・発行日

2013

著者

Tokunaga Eiji Ivanov A. L. Nair Selvakumar V. Masumoto Yasuaki

出版者

American Physical Society

雑誌

Physical review B (ISSN:10980121)

巻号頁・発行日

vol.63, no.23, pp.233203, 2001-06

被引用文献数

11 6

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We report observation of the inverse polariton series and a detailed experimental study of the exciton components in polaritons (Hopfield coefficients). Spontaneous emission of excitonic molecules into outgoing polaritons associated with the i(=1,2,3,4,5)th exciton states in bulk CuCl is detected and analyzed by the bipolariton model. Because the intensities of the emission lines, which form the inverse polariton series, are determined by the exciton components in the final-state polaritons, we are able to measure the Hopfield coefficients for the highly composite outgoing polaritons. Quantum interference in the optical decay of excitonic molecules, due to the multiple exciton components in the polariton and biexciton states, is also demonstrated.

著者

Gerlovin I. Ya. Dolgikh Yu. K. Eliseev S. A. Ovsyankin V. V. Efimov Yu. P. Petrov V. V. Ignatiev I. V. Kozin I. E. Masumoto Y.

出版者

American Physical Society

雑誌

Physical review B (ISSN:10980121)

巻号頁・発行日

vol.65, no.3, pp.035317, 2002-01

被引用文献数

21 17

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Picosecond kinetics of polarized resonant photoluminescence (PL) of HH excitons in the GaAs/AlGaAs superlattices is studied in an external magnetic field. The measurements were made in real time using a streak camera. For the magnetic field aligned along the heterostructure growth direction, the resonant PL exhibits oscillations in the degree of linear polarization. The oscillations are ascribed to quantum beats between sublevels of the optically active excitonic doublet split by the magnetic field. For the magnetic field aligned along the plane of the layers, the resonant PL is found to exhibit oscillations in circular polarization. These oscillations are related to beats between states of the optically active and optically inactive excitonic doublets. Experimental dependence of the oscillation frequency on the magnetic field strength and orientation has allowed us to determine the hole and electron g factors and the electron-hole exchange energy. Dynamics of the degree of circular polarization of the PL in magnetic field is used to measure the energy relaxation rate of the exciton spin states. In the magnetic field exceeding 1 T, the energy relaxation rate is shown to be magnetic-field independent and equal (1±0.2)×1010 s-1. This value is found to be much smaller than the spin phase relaxation rate determined from decay of the quantum beats in linear polarization. Unlike the energy relaxation rate, the latter grows linearly with the field strength and equals (5±0.5)×1010 s-1 at 5 T. It is concluded that the main mechanism responsible for loss of macroscopic spin coherence is the reversible dephasing within inhomogeneously broadened system.

著者

Kozin I. E. Davydov V. G. Ignatiev I. V. Kavokin A. V. Kavokin K. V. Malpuech G. Ren Hong-Wen Sugisaki M. Sugou S. Masumoto Y.

出版者

American Physical Society

雑誌

Physical review B (ISSN:10980121)

巻号頁・発行日

vol.65, no.24, pp.241312, 2002-06

被引用文献数

61 53

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Spins of resident electrons in charged quantum dots (QD’s) act as local magnets inducing the Zeeman splitting of excitons trapped into dots. This is evidenced by the observation of quantum beats in the linearly polarized time-resolved photoluminescence of a biased array of self-assembled InP QD’s. An external magnetic field is found to shorten the spin beats’ decay time keeping constant the frequency of the beats. A model using the pseudospin formalism allows one to attribute the observed quantum beats to the radiative decay of hot trions having two electrons that occupy different energy levels in a QD.

著者

Brouwer P. W. Racine E. Furusaki A. Hatsugai Y. Morita Y. Mudry C.

出版者

American Physical Society

雑誌

Physical review B (ISSN:01631829)

巻号頁・発行日

vol.66, no.1, pp.014204, 2002-07

被引用文献数

32

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If the number of lattice sites is odd, a quantum particle hopping on a bipartite lattice with random hopping between the two sublattices only is guaranteed to have an eigenstate at zero energy. We show that the localization length of this eigenstate depends strongly on the boundaries of the lattice, and can take values anywhere between the mean free path and infinity. The same dependence on boundary conditions is seen in the conductance of such a lattice if it is connected to electron reservoirs via narrow leads. For any nonzero energy, the dependence on boundary conditions is removed for sufficiently large system sizes.

著者

Yugova I. A. Gerlovin Ya. Davydov V. G. Ignatiev I. V. Kozin I. E. Ren H. W. Sugisaki M. Sugou S. Masumoto Y.

出版者

American Physical Society

雑誌

Physical review B (ISSN:10980121)

巻号頁・発行日

vol.66, no.23, pp.235312, 2002-12

被引用文献数

37 36

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The paper reports on quantum beats observed in the photoluminescence kinetics of a single layer of the InPself-assembled quantum dots in a magnetic field. It is found that the beats arise only after removal of excesscharges from the quantum dots by an external electrical bias. The quantum beats are shown to be related to theinterference of the excitonic fine-structure states split by the magnetic-field. The dependences of the beatcharacteristics on the magnetic-field strength and orientation are studied. Theoretical analysis based on a modelspin Hamiltonian has allowed us to describe adequately the shape of the oscillating component of the signal.We have determined the values of the electron g-factor components and estimated the spread and the meanvalue of the hole g factor, as well as of the electron-hole exchange splitting parameters.

著者

Francisco J. Pastor-Pérez Sergio Manzano-Fernández Rebeca Goya-Esteban Domingo A. Pascual-Figal Oscar Barquero-Pérez Jose Luis Rojo-Álvarez Estrella Everss Maria Dolores Martinez Martinez-Espejo Mariano Valdés Chavarri Arcadi García-Alberola

出版者

日本循環器学会

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.76, no.9, pp.2124-2129, 2012 (Released:2012-08-24)

参考文献数

30

被引用文献数

3

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Background: Abnormalities in autonomic control are a feature of neuroendocrine activation in HF and are responsible for dysregulation of biological rhythms. The purpose was to investigate the presence and the prognostic significance of long-period heart rate (HR) rhythms in heart failure (HF) patients. Methods and Results: In the study, 92 HF patients were enrolled (age 53±14 years and left ventricular ejection fraction [LVEF] 37±10%). A rhythmometric analysis was used to assess the HR rhythms in 7-days (7D) Holter recordings. Rhythms properties were quantified by mesor and amplitude, in beats/min and by acrophase, in hours. Cardiac death or HF decompensation were registered. All patients had 24-h rhythm, 61 patients (77%) had 8-h rhythm, and 66 patients (83%) had 7D rhythm. Twelve patients (15%) experienced events. Among rhythm parameters only 7D median amplitude was different between patients with or without events: 1.1beats/min [0.5–1.5] vs. 2.0beats/min [0.0–3.9], P=0.049 respectively. After multivariate adjustment, LVEF (per 1%, hazard ratio 0.92, 95% confidence interval (CI) 0.87 to 0.98, P=0.01), N-terminal portion of pro-natriuretic hormone type B (per 100pg/ml, hazard ratio 1.036, 95% CI 1.005–1.069, P=0.022), and 7D amplitude of the HR ≤1.71beats/min (hazard ratio 5.4, 95% CI 1.2–34.4, P=0.047) were independent predictors of events. Conclusions: A 7D HR rhythm is present in most patients with HF, and has prognostic significance.  (Circ J 2012; 76: 2124–2129)

著者

今島 実 Ten Hove Harry A.

出版者

日本動物分類学会

雑誌

動物分類学会誌 (ISSN:02870223)

巻号頁・発行日

no.32, pp.1-16, 1986-03-25

被引用文献数

1

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昭和59年度文部省科学研究費補助金による海外学術調査(研究代表者今島実,課題番号59041066)が昭和59年7月10日〜9月2日間にナウール共和国,キリバス共和国のギルバート諸島とソロモン諸島で海産動物相を明らかにする目的で実施された.多くの多毛類が採集されたなかで,カンザシゴカイ科が研究され,2新種を含む9属24種が明らかにされた.すべての種類がソロモン諸島から見出され,うち18種(75%)が日本海域まで分布している.ギルバート諸島からは,9種のみが見出され,うち7種が日本まで分布している.ソロモン諸島のカンザシゴカイ類の種数は,ギルバート諸島より多く,また日本のカンザシゴカイ類相と近似性が高いことがわかった.

著者

Abeysekera B. A. Hirantha Sithira 松田 崇弘 滝根 哲哉

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会技術研究報告. IN, 情報ネットワーク (ISSN:09135685)

巻号頁・発行日

vol.105, no.628, pp.91-96, 2006-02-23

被引用文献数

1

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IEEE 802.11規格の無線LAN環境では,アクセスポイント(AP)が下りフローを多重化しているにもかかわらず無線端末と同等のアクセス権しか割り当てられていないことから,複数の下りフローがAPで多重化されている場合,上下フロー間にスループットに関する不公平が生じることが知られている.本稿では,APにおけるMACプロトコルを改良することにより公平性を改善する方式を提案する.提案方式はMACプロトコルのパラメタであるコンテンションウインドを変更することによりAPに優位性を与える方式であり,APのMACプロトコルのみの改良で実現できる.また,パラメタの最適値は一般には上りフローと下りフローの数で決まるが,提案方式はAPを通過する下りフロー数のみに基づいた簡易な制御となっている.TCPおよびUDPトラヒックに対する提案方式の有効性をシミュレーションにより検討する.

著者

Daugsch A. Moraes C.S. Fort P. Park Y.K.

出版者

玉川大学ミツバチ科学研究所

雑誌

ミツバチ科学 = Honeybee science (ISSN:03882217)

巻号頁・発行日

vol.27, no.2, pp.55-62, 2007-02 (Released:2011-03-05)

著者

Bedascarrasbure E. Maldonado L. Alvarez A.

出版者

玉川大学ミツバチ科学研究所

雑誌

ミツバチ科学 = Honeybee science (ISSN:03882217)

巻号頁・発行日

vol.25, no.3, pp.129-131, 2004-10 (Released:2011-03-05)