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RISS 인기검색어
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- 저자 : Nakayasu, Tetsuo (검색결과 6 건)
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Tense and the Speaker`s Attitude in English
( Minako Nakayasu ) 한국언어정보학회 1998 국제 워크샵 Vol.1998 No.-
This paper gives attention to the so-called Sequence of Tenses phenomenon in English and explores what sorts of factors influence tense choice. Our analysis proves that what plays the crucial role in tense choice is the reporting speaker``s attitude to the message, and that he or she chooses the tense taking three simplified factors into consideration: the semantic relation between the reporting verb and the reported message, the syntactic relation between the reporting clause and the reported clause, and extra-sentential, pragmatic factors. It is shown that although the reporting speaker is the final authority in choosing tense, he or she has to resort to these factors and judge how much responsibility he or she has for the truth value of the message.
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Development and Installation of Flap-gate Type Seawall Against Tsunami and Storm Surge
Yuichiro Kimura,Toru Itagaki,Kyoichi Nakayasu 한국연안방재학회 2017 한국연안방재학회 학술발표대회 논문집 Vol.2017 No.-
A flap-gate type movable seawall, which usually lies down on the ground, rises up automatically by buoyancy during inundation by tsunamis or storm surges, and then it forms a continuous seawall. This structure keeps lying in usual time to secure traffic and landscape. In emergence time, it protects a target area against inundation without power machineries and human operation. This structure is named as NEORISE which means No Energy and no Operation RIsing SEawall. The 2011 Tohoku Earthquake gave damages to power machineries and communication systems of tsunami-barrier gates and these tsunamis caused many casualties who tried to operate and close these gates. Structures for tsunami protection are required so as to avoid machinery failure and risk of operators. The NEORISE satisfies both of these requirements. In Japan 78 systems have been already constructed and this technology will contribute toward preventing and mitigating flood disaster.
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Mucus Plugs and Small Airway Dysfunction in Asthma, COPD, and Asthma-COPD Overlap
Tamura Kanami,Shirai Toshihiro,Hirai Keita,Nakayasu Hiromasa,Takahashi Shingo,Kishimoto Yutaro,Akamatsu Taisuke,Asada Kazuhiro,Kato Satoshi 대한천식알레르기학회 2022 Allergy, Asthma & Immunology Research Vol.14 No.2
Purpose: There are reports concerning mucus plugs detected on high-resolution computed tomography images and airflow obstruction in asthma and chronic obstructive pulmonary disease (COPD). However, little is known about the associations between mucus plugs and small airway dysfunction (SAD). We evaluated the relationship between mucus plugs and pulmonary function in patients with asthma, COPD, and asthma-COPD overlap (ACO), and investigated the relevance to SAD and type 2 inflammation in a retrospective study. Methods: Subjects included 49 asthmatic, 40 ACO, and 41 COPD patients. ACO was diagnosed based on the Japanese Respiratory Society ACO guidelines. Clinical and laboratory parameters, including blood eosinophil count, serum total IgE levels, fractional exhaled nitric oxide (FeNO), spirometry, and forced oscillation technique (FOT), were compared between patients with and without mucus plugs. Results: Mucus plugs were found in 29 (59%) asthmatic, 25 (65%) ACO, 17 (41%) COPD patients. Patients with mucus plugs had reduced spirometry and larger FOT parameters, especially in COPD patients. Mucus scores correlated positively with IgE in ACO and FeNO in asthmatic patients, but not in COPD patients. Multivariate logistic regression analysis revealed that SAD parameters, including forced vital capacity and resonant frequency, a respiratory reactance parameter, were significantly associated with the presence of mucus plugs in the whole studied population. Conclusions: SAD, rather than large airway dysfunction, was associated with mucus plugs in asthma, ACO, and COPD patients.
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Application of DV-X$\alpha$ Method to ${\gamma}$-2CaO.SiO$_2$
Yamaguchi, Norio,Fujimori, Hirotaka,Ioku, Koji,Goto, Seishi,Nakayasu, Tetsuo The Korean Ceramic Society 2000 The Korean journal of ceramics Vol.6 No.4
In the present study, we attempted to apply DV-X$\alpha$ method to expressing the reactivity of materials. The expression of reactivity was discussed by comparison between ${\gamma}$-C$_2$G having hydraulic activity and ${\gamma}$-C$_2$S not having hydraulic activity at normal conditions. It was found that the model cluster used for calculation can finely reproduce the bulk and surface states using with and without point charge, respectively. The hydration state was also represented by placing OH￣ on the surface of the cluster. It was calculated that the bond strength of the first layer (as surface) was bigger than that of inner layers (as bulk) for ${\gamma}$-C$_2$S while that of the first layer for ${\gamma}$-C$_2$G was smaller than that of inner layers. Subsequently a model in which OH￣ is coordinated on Ca at the surface was also calculated. The bond strength with OH￣ was stronger than that without OH￣, while for ${\gamma}$-C$_2$G the bond strength with OH￣ was weaker than that without OH￣. From these results, it is concluded that the hydraulic activity depends on whether the bond strength for hydrated state becomes weaker than that unhydrated state or not.
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${29}^Si$ MAS NMR Study on Quantitative Analysis of the Amorphous Phase in a $Si_3N_4$ Powder
Fujimori, Hirotaka,Kitahara, Hiromoto,Ioku, Koji,Goto, Seishi,Nakayasu, Tetsuo,Yamada, Tetsuo The Korean Ceramic Society 2000 The Korean journal of ceramics Vol.6 No.2
NMR study has been used for measuring precise quantity of the amorphous phase in the $Si_3N_4$powder. Care must be taken to allow the $^{29}$Si nuclear spin system to fully relax between pulses in order to make the signals proportional to the number of nuclei in each phase. $^{29}$Si MAS spectrum was decomposed into the three spectra of $\alpha$-, $\beta$-, and amorphous $Si_3N_4$assuming pseudo-Voigt function. Moreover, the Rietveld analysis of the powder X-ray diffraction data was performed to measure quantity of crystalline phases as $\alpha/\beta$ ratio.
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