著者

神谷 優太 亀田 貴之 大浦 健 東野 達

出版者

Taylor & Francis

雑誌

Polycyclic Aromatic Compounds (ISSN:10406638)

巻号頁・発行日

vol.37, no.2, pp.128-140, 2017

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The concentrations of functionalized polycyclic aromatic hydrocarbons (PAHs), i.e., oxygenated PAHs (OPAHs), nitrated PAHs (NPAHs), and chlorinated PAHs (ClPAHs), in soluble organic fractions of automobile exhaust particles (NIST SRM 1975 and NIES CRM No.8) and airborne particles (NIST SRM1648a and PM₂.₅ collected at Kyoto, Japan) were simultaneously determined using gas chromatography–mass spectrometry with negative chemical ionization (GC–NCI–MS). The concentrations of PAH derivatives in standard reference materials determined by GC–NCI–MS were in good agreement with the certified and literature values. Ten OPAHs, 12 NPAHs, and 12 ClPAHs were detected in ambient PM₂.₅ collected in Kyoto, Japan by the proposed analytical method.

著者

Kojima Soichi

出版者

Taylor & Francis

雑誌

Soil Science and Plant Nutrition (ISSN:00380768)

巻号頁・発行日

vol.64, no.5, pp.616-622, 2018-08-06

被引用文献数

3

著者

Koyanaka Hideki Miyatake Hideo

出版者

Taylor & Francis

雑誌

Separation Science and Technology (ISSN:01496395)

巻号頁・発行日

vol.50, no.14, pp.2142-2146, 2015-04-23

被引用文献数

1

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水からトリチウムを室温下で効率よく分離できる吸収剤の開発に成功 --原発汚染水処理、先端創薬合成、高信頼性細胞培養液への応用に期待--. 京都大学プレスリリース. 2015-04-23.Extracting tritium of parts-per-trillion-levels from water at room temperature was provided using a protonic manganese oxide with a spinel crystal structure under weakly acidic conditions. Indeed, using 0.48 g of the protonic manganese oxide powder led to the removal of 1.75 × 10[5] Bq of tritium in 20 min at room temperature from a test water (100 mL) that contained a tritium concentration of 5.6 × 106 Bq/L (i.e., 15.6 ng/L). The extraction capability of tritium significantly depended on the crystal structure of manganese oxides and the proton content in the spinel crystal structure.

著者

Endo Tomohiro Chiba Go van Rooijen Willem Frederik Geert Yamanaka Masao Pyeon Cheol Ho

出版者

Taylor & Francis

雑誌

Journal of Nuclear Science and Technology (ISSN:00223131)

巻号頁・発行日

vol.55, no.4, pp.450-459, 2018

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Nuclear data-induced uncertainties of neutronics parameters (neutron multiplication factor keff, one-point kinetics parameters and prompt neutron decay constant α) are quantified for lead-bismuth zoned accelerator-driven system experiments at the Kyoto University Critical Assembly, in order to contribute validation for subcritical core analysis. The random sampling technique using SCALE6.2.1/Sampler/NEWT/PARTISN is utilized for the validation and the uncertainty quantification, because the random sampling technique is applicable for a problem which is not easy to apply the perturbation theory. Consequently, it is confirmed that the numerical results of α reasonably agree with the experimental ones, compared with the nuclear data-induced uncertainties. In addition, it is clarified that the nuclear data-induced correlations between α and keff and between α and neutron generation time Λ are strongly negative and positive, respectively. This fact implies that the numerical predictions of keff and Λ can be improved by the data assimilation technique using subcritical experimental results of α, which can be directly measured even for a deep subcritical system.

著者

Kimura Shuhei

出版者

Taylor & Francis

雑誌

Science as culture (ISSN:09505431)

巻号頁・発行日

vol.25, no.1, pp.23-43, 2016-03

被引用文献数

46

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The triple disaster of March 11, 2011 posed a formidable challenge for Japanese society in general, and for affected coastal communities in particular. In the immediate aftermath of the catastrophe, there was widespread support for the construction of high seawalls to protect communities. However, many communities began questioning this approach. In Maehama, the question of land reconstruction and protection gave rise to a set of complex responses. The government aimed to put in place even higher seawalls; however, the local community proposed instead to mark the boundary of high water with trees and stakes. These solutions instantiate different ways of infrastructuring the post-tsunami environment for safety; they carry different assumptions about infrastructure itself. Whereas the seawall solution was technical and quantitative, centering on the question of height, the boundary markers embedded qualitatively different assumptions about what makes a workable infrastructure. In particular, this difference centered on issue of visibility. On the one hand, the seawall was meant to slowly become unremarkable, whereas the boundary markers were specifically intended to maintain community memory. On the other hand, the seawall would make the sea itself invisible, whereas keeping the sea in sight is very important to villagers. However, the opposition between these forms of infrastructuring the environment was not total. A solution was gradually negotiated in which the sea wall and the boundary markers could complement each another. This situation highlights the intricate, transformable relation between visible and invisible forms of infrastructure.

著者

Robert Siegel John R. Howell

出版者

Taylor & Francis

巻号頁・発行日

2002

著者

S. A. Ostroumov

出版者

Taylor & Francis

巻号頁・発行日

2006

著者

Takasaki Yoshito

出版者

Taylor & Francis

雑誌

The Journal of development studies (ISSN:00220388)

巻号頁・発行日

vol.48, no.1, pp.115-132, 2012-01

被引用文献数

7

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Using original post-disaster household survey data gathered in rural Fiji, this article explores the disaster–gender nexus. Female-headed households are disadvantaged, not because of bias against them in disaster damage or relief, but because of a newly emerging gendered division of labour for dwelling rehabilitation that tightens their constraints on intra-household labour allocation. Female-headed households with damaged dwellings resort to female labour activities connected with informal risk sharing – augmenting production of handicrafts for kava rituals in exchange for male-labour help. Female-headed households without male-adult members resort to such activities more than those with them, because of their distinctly different decision-making processes.

著者

Akahira M. Ohyauchi N.

出版者

Taylor & Francis

雑誌

Statistics : a journal of theoretical and applied statistics (ISSN:02331888)

巻号頁・発行日

vol.41, no.2, pp.137-144, 2007-04

被引用文献数

3 9

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From the Bayesian viewpoint, the information inequality applicable to the non-regular case is discussed. It is shown to construct an estimator which minimizes locally the variance of any estimator satisfying weaker conditions than the unbiasedness condition from which an information inequality is derived. The Hammersley–Chapman–Robbins inequality is also obtained as a special case of the inequality. An example is also given.

著者

Takasaki Yoshito

出版者

Taylor & Francis

雑誌

The Journal of development studies (ISSN:00220388)

巻号頁・発行日

vol.47, no.9, pp.1281-1298, 2011-09

被引用文献数

29

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Using original survey data with rich, direct measures of local elites in rural Fiji, this article examines potential elite capture in the allocation of natural disaster reconstruction funds. Allocations of housing construction materials – both receipt and amount received – across villages, clans, and households are strongly targeted on cyclone damage, and local elites do not receive larger benefits over time. As the supply of reconstruction funds is limited during early periods, more severely affected victims do not receive benefits early, while clan leaders and elite clans do receive benefits early within villages.

著者

Koike Ken-ichi

出版者

Taylor & Francis

雑誌

Sequential analysis (ISSN:07474946)

巻号頁・発行日

vol.26, no.1, pp.63-70, 2007

被引用文献数

4 5

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For a location-scale parameter family of distributions with a finite support, a sequential confidence interval with a fixed width is obtained for the location parameter, and its asymptotic consistency and efficiency are shown. Some comparisons with the Chow-Robbins procedure are also done.

著者

Aoshima Makoto Yata Kazuyoshi

出版者

Taylor & Francis

雑誌

Sequential analysis (ISSN:07474946)

巻号頁・発行日

vol.30, no.4, pp.432-440, 2011-11

被引用文献数

6

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In this article, we respond to the comments made by the 10 discussants on “Two-Stage Procedures for High-Dimensional Data.” We also give some new results along with their brief explanations.

著者

Aoshima Makoto Yata Kazuyoshi

出版者

Taylor & Francis

雑誌

Sequential analysis (ISSN:07474946)

巻号頁・発行日

vol.30, no.4, pp.356-399, 2011-11

被引用文献数

51 13

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In this article, we consider a variety of inference problems for high-dimensional data. The purpose of this article is to suggest directions for future research and possible solutions about p n problems by using new types of two-stage estimation methodologies. This is the first attempt to apply sequential analysis to high-dimensional statistical inference ensuring prespecified accuracy. We offer the sample size determination for inference problems by creating new types of multivariate two-stage procedures. To develop theory and methodologies, the most important and basic idea is the asymptotic normality when p → ∞. By developing asymptotic normality when p → ∞, we first give (a) a given-bandwidth confidence region for the square loss. In addition, we give (b) a two-sample test to assure prespecified size and power simultaneously together with (c) an equality-test procedure for two covariance matrices. We also give (d) a two-stage discriminant procedure that controls misclassification rates being no more than a prespecified value. Moreover, we propose (e) a two-stage variable selection procedure that provides screening of variables in the first stage and selects a significant set of associated variables from among a set of candidate variables in the second stage. Following the variable selection procedure, we consider (f) variable selection for high-dimensional regression to compare favorably with the lasso in terms of the assurance of accuracy and the computational cost. Further, we consider variable selection for classification and propose (g) a two-stage discriminant procedure after screening some variables. Finally, we consider (h) pathway analysis for high-dimensional data by constructing a multiple test of correlation coefficients.

著者

Baba Akiko Takasaki Kenji Tanaka Fujinobu Tsukasaki Naoki Kumagami Hidetaka Takahashi Haruo

出版者

Taylor & Francis

雑誌

Acta oto-laryngologica (ISSN:00016489)

巻号頁・発行日

vol.129, no.1, pp.25-29, 2009-01

被引用文献数

16

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CONCLUSIONS: Our results suggest that summating potential/action potential (SP/AP) area ratio may not necessarily have higher sensitivity in the diagnosis of endolymphatic hydrops of Meniere's disease (MD) than SP/AP amplitude ratio in transtympanic electrocochleography (ECochG). OBJECTIVE: Recent studies suggested that SP/AP area curve ratio was more sensitive to endolymphatic hydrops in comparison with SP/AP amplitude ratio in extratympanic ECochG. The purpose of the present study was to evaluate the utility of the SP/AP area curve ratio in transtympanic ECochG for the diagnosis of MD. PATIENTS AND METHODS: A retrospective chart review of 198 patients (209 ears) was conducted in cases of MD. RESULTS: With regard to SP/AP amplitude ratio, 57.1% in definite cases of MD (group 1), 39.6% in probable cases of MD (group 2), and 50.0% in the cases who had transformed from probable MD to definite MD (group 3) showed abnormally high values, respectively. Abnormally high values were observed in 43.9%, 27.7%, and 30.0% in SP/AP area ratio in groups 1, 2, and 3, respectively, indicating that abnormal values were observed more frequently in the amplitude ratio than in the area ratio in all three groups.