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이 연구서는 3개의 서로 다른 Role-Making 모델을 제시하고 있다. 이 3개의 모델은 모두 커뮤니케이션 역할에 중점을 두고 있다. 첫 번째 모델은 <사회화 커뮤니케이션 모델>이라고 불리워졌는데 <사회적 영향과정>의 중요성을 강조하고 있다. <사회적 정보>가 태도변화 또는 필요변화에 영향을 미치는 정도를 결정짓는 3개의 요소, 즉 <사회적 정보의 현저성>, <믿음성>, <불확실성>이 고려되었다. 두 번째 모델인 <수용커뮤니케이션 모델>은 조직의 관리자가 새로 조직에 들어온 부하들의 생각을 수용하므로써 이루어지는 Role-Making의 과정을 설명하고 있다. 끝으로 <교환커뮤니케이션 모델>은 새로운 조직에 들어온 구성원들이 자신들의 커뮤니케이션 네트워크를 활용하면서 Role-Making에 필요한 정보를 어떻게 결정하는가에 초점을 맞추고 있다. 이 3개의 Role-Making 커뮤니케이션 모델들과 연관되어 제시된 가설들이 앞으로 이루어질 연구방향을 설명하고 있다. Traditionally, organizational role-making has been conceptualized in terms of socialization and individualization, with most research attention in the area of socialization. Traditional approaches to role-making have focused on the stages in which an individual changes over time, and the cognitive process accounting for how and why a newcomer progress from one stage to another. In contrast, the models proposed above provide a broad conceptual framework to guide future research on the roles of communication in the role-making process. This framework implies that organizational role-making may be increased by controlling communication process or by redesigning communication structure. The framework includes three communication models. First, the socialization communication model was described as a social influence process. This model stressed the importance of social information in the role-making process. Three factors were considered relevant to determining the degree to which social information cues affect the changes of attitudes and needs: saliency of social information, source credibility, and task ambiguity. Second, the accommodation communication model was identified as an upward influence process. Finally, the exchange communication model focused on how newcomers comunication networks may determine the characteristics of information necessary for role-making. For all three of these models, propositions were presented which could guide research using these models of the role-making process.
According the modern society's industralizaiton, natural environment related to the water resources are rapidly changing. To take stable acquisiton of water resources and to prevent the natural disaster, the more accurate hydrological informations for the concerned area are strongly required. For the upper mentioned reason, this study aims to extract the basin data which are essential for the watershed analysis and for the systematic management of hydrological environment by using Geospatial Information System(GIS). Vertexes are abstracted from 1/25,000 and 1/5,000 digital maps of Kimchon, Gaya, and Pyongchang area to produce the Digital Elevation Model(DEM). Basin data are calculated using the produced DEM and Watershed Modeling System(WMS), and curve Numbers(CN) are evaluated from the topographic maps and land use maps. As the results of this study, basin data - fundamental factors for the Hydrological Geospatial Information Database - can be acquired more rapidly by the suggested method compared to the conventional method of using only topographic maps. And for the interpolation method, Kriging is identified to give the most similar results as the real Dimensionless Unit Hydrograph in case of 50m resolution DEM.
The main theme of this paper is the introduction and use of interest rate futures contracts in Korea. This paper consists of three subthemes. The first is a study on the introduction of interest rate futures contracts in Korea, CD and Gov't T-Bond futures. The second is a study on pricing and presentation of prices of these two interest rate futures contracts. The third is a study on the use of these two interest rate futures contracts. Especially this study focused on hedging. BPV and Duration method for deriving hedge ratio are introduced in this paper, which are introduced in this paper, which are based on price sensitivity model.
The Ta^5+ ions in sol-gel derived Sr_0.7 Bi_2.3 Ta_2O_9 (SBT) were partially substituted by Zr^4+ to form Sr_0.7 Bi_2.3 Ta_1.7 Zr_0.3 O_9 (SBTZ) thin films and Aurivillius phase formation characteristics were compared for each thin film, X-ray diffraction (XRD) analyses were performed on the thin films heated in the range of 730 to 760˚C at 10˚C intervals and it was found that phase formation and crystal growth were greatly affected bythe film composition and crystallization temperature. Johnson-Mehl-Avrami (JMA) isothermal kinetic analyses were performed on the XRD results and activation energy and Avrami exponent values were determined for the fluorite-to-Aurivillus phase transformation. A reduction of ~82 kJ/mol in activation energy was observed for the SBZT thin films, which revealing the key reason of enhanced kinetics in SBTZ, XRD and scanning electron microscopySEM) showed the remaining of fluorite phase in SBT and the formation of a secondary phase in SBTZ.
The purpose of this paper is to analyze belief-context on the basis of Situation Semantics, escaping the tradition of model-theoretic semantics. Belief-context is not only opaque but ambiguous; it does not observe Compositionality Principle. It, therefore, can be interpreted in two ways : one is the de re reading, and the other the de dicto reading. In the former case, we should anchor an indeterminate to a specific object in terms of anchor f. In the latter, on the other hand, we should leave the indeterminate not anchored. In the first part of the paper, let us first examine the analysis of the context based on model-theoretic Montague Semantics to show its theoretical framework radically different from Situation Semantics. In the second part, let us try to analyze the context in terms of Situation Semantics.
In this work, aging characteristics of outdoor composite insulator resulting from the acid rain have been investigated with regards to the sulfate ion (SO^(-2)_(4)). For this purpose, silicone rubber was chemically aged by immersing into the solutions with different levels of PH during 1,500 hours and various tests (tracking, tanδ, breakdown voltage, SEM, EDS, contact angle) were perfomed. It was observed that the degradation was mainly arised from surface, and also sample surface was eroded. And thus, it could be expected that silica component of the sample was leaked out, which might affect the electrical properties of insulator material.
To better analyze, design, plan, and implement a CIM more successfully, we must understand the complexities of the structure of a CIM, the functions being performed, and the information needed in CIM. IDEF methodology has ability to model the functional, information, and dynamics view of the system. But IDEF has deficiency of weak cohesion between the model. In this paper i present the Integrated System Description Methodology that extends the IDEFO and uses ER model to overcome it's shortcomings and to build the data model using the information extracted from the functional model.
The doubt of skepticism has been a serious challenge to the possibility of knowledge. Skeptics have argued that we can know nothing about the world around us. But nowadays most epistemologists don't answer the problem of skeptics. They just neglect the problem. But that trend is misguided, I think. Skepticism is not only a start point of epistemology, it also influences the very status of it. In this spirit, I try to illustrate the importance of skepticism for the philosopical study of knowledge and find out the way to solve the problem of it. Especially, I argue for the naturalist's resolution of skepticism. The true nature of the skeptical threat is still not properly understood, nor are the consequences of its not being met. So to do that, I examine the support arguments of skepticism and counter arguments of it. After that, I turn to the naturalism of Hume and Quine. I claim that naturalist's "idle argument" works well. It doesn't refute skepticism but resolve it. In conclusion, I point out the impossibility of the skeptic's "transcendental doubt" and limit epistemologist's available doubt only to the "scientific doubt". There is no "archemedian point" for epistemologists. So, it is not possible to get to a priori justification which skeptics demand. Skeptical doubt must be taken seriously but it can be answered in empirical, scientific way.
Glass-ceramics with off-stoichiometric celsian composition of 50wt% BaO2SiO₂50wt% BaAl₂O₃2SiO₂,(B2S-BA2S) were fabricated and investigated for their sintering and crystallization characteristic. (B2S-BA2S) glass powder showed a melting temperature much lowered compared to that of stoichiometric BaAl₂O₃2SiO₂(BA2S) glass poweder and high sintering ability.(B2S-BA2S) glass powder containing B₂O₃,(B2S-BA2S)B and that containing B₂O₃and TiO₂(B2S-BA2S)BT revealed much lowered crystallization peak temperatures, but rather low sintered density. By applying Kissiger analysis to differential thermal analysis(DTA) data activation enerty values for crystallization were determined as 265, 195 and 242kJ/mol, respectively for (B2S-BA2S),(B2S-BA2S)B and (B2S-BA2S)BT glasses. X-ray diffraction (XRD) patterns from all the glass-ceramics crystallized at 1100˚C for 4 h revealed formation of crystalline phases of ??-BaO2SiO₂, monocelsian and hexacelsian.(B2S-BA2S) glass-ceramics crystallized at 1400˚C for 20 h showed formation of ??-BaO2SiO₂and moncelsian phases with only trace of metastable hexacelsian phase.
Aluminum nitride (AIN) thin films were fabricated on silicon and glass substrates by reative RF magnetron sputtering in Ar-N₂gas mixtures without substrate heating. It is essential to control the c-axis orientation of AIN films with deposition parameters for the applications of surface acoustic wave devices, since the piezoelectric properties are strongly dependent upon the crystallographic orientation of AIN film. The influences of sputtering pressure and nitrogen concentration on the crystallographic orientation are investigated empoloying X-ray diffraction (XRD), stress measurement and plasma analysis. It is found that the c-axis orientation of deposited film changes from parallel to perpendicular with respest to the substrate surface, as sputtering pressure decreases and nitrogen concentration increases. The magnitude of compressive stress increases with the decrease of sputtering pressue. the principal effect of decreasing sputtering pressure, therefore, is the enhancement of mean free path and adatomic mobilith at the film surface. In addition, the cause of hight c-axis orientation with the increase of nitrogen concentration may by attributed to the increase of N₂and N₂ions in the plasma, through the plasma analysis.