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한국의 일본어학습자의 담화전개의 분석 : 접속표현을 중심으로 with a special reference to connectives
Sakurai, Keiko 한국일어일문학회 1999 日語日文學硏究 Vol.35 No.1
이 연구는 한국의 일본어학습자의 담화전개를 접속표현을 중심으로 분석하여, 그 특성을 밝히고, 담화전개능력의 향상을 위한 지도법을 개발하는 것을 목적으로 한다. 학습자의 접속표현의 사용빈도와 종류의 분석에서 중급중과 중급상과의 사이에 비약적인 변화가 보인다는 것을 발견하였다. 다음으로 담화의 질적인 분석의 면에서도 중급상이상의 단계와 중급중이하의 단계와의 사이에 텍스트의 형태, 담화의 흐름, 결속성, 정밀성의 4개의 기준으로 볼 때 큰 차이가 보인다. 그 다음으로 담화전개상의 오용이나 문제점으로는 テ형의 사용, 같은 접속표현의 중복사용, 오용, 지시사의 문제, 수동태와 보조수수동사의 오용등을 검토하여, 여기에 발견된 문제점을 극복하고 중급중에서 중급상이상으로 올리기 위해 필요한 지도요점을 제시하였다.
Sakurai, Takeo,Kobayashi, Jun,Kinoshita, Kyoko,Ito, Nozomi,Serizawa, Shigeko,Shiraishi, Hiroaki,Lee, Jeong-Hoon,Horiguchi, Toshihiro,Maki, Hideaki,Mizukawa, Kaoruko,Imaizumi, Yoshitaka,Kawai, Toru,Suz Wiley Periodicals 2013 Environmental toxicology and chemistry Vol.32 No.9
<P>The authors investigated the kinetics of transfer of perfluorooctane sulfonate (PFOS) from water, suspended sediment, and bottom sediment to a marine benthic fish, the marbled flounder (<I>Pseudopleuronectes yokohamae</I>). Fish were exposed in 3 treatments to PFOS in combinations of these exposure media for 28 d and then depurated for 84 d. A major part (37–66%) of PFOS in the fish was in the carcass (i.e., whole body minus muscle and internal organs). Three first-order-kinetic models that differed in exposure media, that is, 1) sum of dissolved and particulate phases and sediment; 2) dissolved phase, particulate phase, and sediment; and 3) dissolved phase only, were fitted to the data assuming common rate constants among the treatments. The uptake efficiency of dissolved PFOS at the respiratory surfaces was estimated to be 3.2% that of oxygen, and the half-life of PFOS in the whole body to be 29 d to 31 d. The better fit of models 1 and 2 and the values of the estimated uptake rate constants suggested that the PFOS in suspended and bottom sediments, in addition to that dissolved in water, contributed to the observed body burden of the fish. Based on an evaluation of several possible contributing factors to the uptake of PFOS from suspended and bottom sediments, the authors propose that further investigation is necessary regarding the mechanisms responsible for the uptake. <I>Environ Toxicol Chem</I> 2013;32:2009–2017. © 2013 The Authors. <I>Environmental Toxicology and Chemistry</I> Published by Wiley Periodicals, Inc., on behalf of SETAC. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.</P>
Actual Condition and Issues for Mobile Security System
Sakurai, Kouichi,Fukushima, Kazuhide Korea Information Processing Society 2007 Journal of information processing systems Vol.3 No.2
The high-speed mobile Internet has recently been expanded, many attractive services are provided. However, these services require some form of security-related technology. This paper outlines Japanese mobile services and exposits some mobile security topics including mobile spam, mobile malware, mobile DRM system, mobile WiMAX security, and mobile key management.
Sakurai, Nami,Domoto, Kikuko,Takagi, Shingo Korean Society of Photoscience 2002 Journal of Photosciences Vol.9 No.2
In many plant cells, the positions of chloroplasts change in response to changes in light conditions. In the epidermal cells of the aquatic angiosperm Vallisneria gigantea, the avoidance response of chloroplasts is induced specifically by irradiation with blue light of high intensity. Possible roles of actin cytoskeleton in the blue-light-induced avoidance response of chloroplasts were investigated by partial irradiation and phalloidin staining. We showed that the blue-light-dependent redistribution of chloroplasts was induced only in the limited area, where exposed to blue light, even in individual cells. In addition. in the exposed area, the configuration of actin filaments strikingly changed compared with that before the irradiation. Short and thick bundles of actin filaments surrounding the chloroplasts changed to much longer and thinner bundles with a more stretched array. In contrast, in the unexposed area, neither the distribution of chloroplasts nor the configuration of actin filaments exhibited any changes. Cytochalasin D and latrunculin B inhibited the avoidance response of chloroplasts concomitantly with the fragmentation of actin filaments. These results indicate that the reorganization of actin filaments plays a crucial role in the induction of avoidance response of chloroplasts.
The Recent Tendency of Environmentally-friendly Tackifiers
Sakurai, Yoshihiro The Society of Adhesion and Interface 2007 접착 및 계면 Vol.8 No.1
It is a main trend not to use organic solvents in the adhesive industry from the recent environmental and safe points of view. For example, water-based, hot-melt, or UV curable adhesives are being investigated. Several different kinds of tackifiers that are formulated in the adhesives in order to give them more functional properties like initial tack and higher adhesion, etc., have been proposed to meet the recent trend. Firstly, the characteristics and fundamental properties of the respective materials are presented. In Japan, the trend to develop the water-based adhesives is most remarkable. While the environmental regulations are getting harder, Arakawa Chemical has been spending a lot of energy for the research, and developed toluene-free and solvent free tackifier dispersions that are presented precisely.
Inhibitor Effect of Nickel and Surface Analysis
Sakurai Kiyoshi,Yoshifumi Urano,Tsugito Yamashita 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Gold plating films are used extensively as electronics industry materials, because it is such as high corrosion resistance and conductivity. However, gold plating thin films are probably porous layer. Therefore, nickel plating films under gold plating films are corroded by local cell. In this paper, the inhibitor-effect is investigated by electrochemical technique and structural analysis of surface and interface.
MAGNETIC HELICITY OF SOLAR ACTIVE REGIONS AND ITS IMPLICATIONS
SAKURAI T.,HAGINO M. The Korean Astronomical Society 2003 Journal of The Korean Astronomical Society Vol.36 No.suppl1
We have studied the magnetic helicity of active regions by using the data from (1) the photo-electric magnetograph of the Okayama Observatory (1983-1995) and (2) the video magnetograph of NAOJ/Mitaka (1992-2000). The latitude distribution of helicity showed a tendency that the regions in the north (south) hemisphere have negative (positive) helicities, respectively, which is already known as the hemispheric sign rule. If we look into the sign of helicity as a function of time, the sign rule was less definite or was reversed sometimes in the sunspot minimum phase. We also studied the relation between the magnetic helicity and the sunspot tilt angles, and found that these two quantities are positively correlated, which is opposite to the expectation of a theoretical model. The implications of this cycle-phase dependence of helicity signs and the correlation between magnetic he Ii city and sunspot tilt angles are discussed.
Molecular Dynamics of the M intermediate of photoactive yellow protein in solution
Sakurai, Minoru,Shiozawa, Mariko,Arai, Shohei,Inoue, Yoshio,Kamiya, Narutoshi,Higo, Junichi Korean Society of Photoscience 2002 Journal of Photosciences Vol.9 No.2
PYP consists of a water-soluble apoprotein and 4-hydroxycinnamyl chromophore bound to Cys69 via thiolester linkage, Upon absorption of a photon, the photocycle is initiated, leading to formation of several photo-intermediates. Among them, M intermediate is important to understand the signal transduction mechanism of PYP, because it is a putative signaling state. As well known, the dynamics of a protein is closely correlated with the occurrence of its function. Here we report the results of IO ns molecular dynamics (MD) simulation for the M intermediate in aqueous solution and discuss the characteristic feature of this state from a viewpoint of structural fluctuation.