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      • KCI등재

        가상현실기술을 활용한 터널부 길어깨 확장 효과 분석

        김형규,김병곤 차세대컨버전스정보서비스학회 2021 차세대컨버전스정보서비스기술논문지 Vol.10 No.6

        우리나라는 안전 및 운영 효율성을 고려하여 터널을 지속적으로 설치하였으며, 지난 10년간 터널 설치 개수는 약 2배 정도 증가하였다. 터널부의 경우 지침에 의거하여 설계되고 있으나, 터널 입구부분의 경우 암순응 및 압박감에 의하여 감소하게 되며, 실제 일본 고속도로에서 발생하는 정체의 약 13%가 터널 입구부에서 발생하고 있으며 이에 따른 정체 및 추돌사고가 야기되고 있다. 이에, 본 연구에서는 가상주행 시뮬레이터를 활용하여 터널 입구부 사고를 감소시킬 수 있도록 터널 진입부 길어깨 확대에 의한 안전성을 분석하였다. 동일한 조건에서 우측 길어깨 폭만의 변화에 따른 주행안전성을 비교하기 위하여 가상주행 시뮬레이션을 이용하여 20대~60대 피실험자 30명을 대상으로 실험을 진행하였다. 오른쪽 길어깨는 고속도로 설계지침서와 도로의 구조 설치 기준의 관한 규칙에 따라 2.5m와 3.0m로 구분하여 시나리오를 구성하였다. 분석구간의 평균 주행속도와 터널 진입시 평균 주행속도와의 속도편차, 차로중심에서 벗어난 거리 및 차량 핸들 조향각도를 분석한 결과, 길어깨 폭이 3.0m일 때 2.5m일 때에 비하여 주행안전성 측면에서 안전성을 느끼는 것으로 타났다. 연구결과를 종합할 경우, 우측 길어깨 폭이 3.0m로 하는 것이 주행안전성 측면에서 우수하나, 건설비용을 고려하여 일평균 교통량 33,000대를 이상의 교통량을 보이는 도로구간에 대해서는 향후 고속도로 설계시 우측 길어깨 폭을 3.0m 이상으로 확장시켜 안전성 및 운영성을 모두 확보할 필요가 있다. South Korea continuously installed tunnels in consideration of the safety and operation efficiency, and the number of installed tunnels has doubled over the past 10 years. The tunnel section is designed based on the guidelines, but the tunnel entrance becomes narrow due to dark adaptation and pressure. In fact, around 13% of traffic in expressways of Japan happens in the entrance and this leads to congestion and rear-end collision accidents. Therefore, this study aims to analyze the stability from the expansion of the shoulder width in the tunnel entrance by applying virtual reality driving simulator in order to reduce the accidents that happen in the tunnel entrance. To compare the driving stability based on the changes in the width of the right shoulder under the same condition, virtual reality driving simulator is used to conduct an experiment on 30 subjects in their 20s to 60s. The right shoulder is classified into 2.5m and 3.0m based on the design guidelines of the expressways and the road structure installation regulations. As a result of analyzing the speed deviation between the average driving speed of the analysis section and the average driving speed when entering the tunnel, the distance away from the center of the lane, and the steering angle of the vehicle steering wheel, safety in terms of driving safety was improved when the shoulder width was 3.0 m compared to that of 2.5 m. turned out to be felt In addition.

      • KCI등재
      • KCI등재
      • 貨幣的 成長理論에 관한 比較硏究

        金亨圭 慶北大學校 1985 論文集 Vol.39 No.-

        Most of "real" growth models either ignore or minimize the role and importance of money in the process of accumulation and growth. For the first time, in 1955, Tobin made an attempt to insert monetary factors into theoretical discussions on the growth of economy. The monetary growth theory examines the influence of money and monetary policy on the development of nominal and real variables in a growing economy; It can be considered to be a new field or a further specialization within the broad framework of the growth theory. In recent years much attention has been paid to the monetary growth theory in many economic writings. This has led to prolific publications in an effort to integrate the theories of money and growth into a theoretical system, in which a great variety of presuppositions, definitions and interpretations have been presented. The purpose of this study is to survey the development and the present state of affairs in this new field of economics and to investigate into differences among various monetary growth models. The approaches made so far to monetary growth models can be divided into three categories; The neo-classical approach, The Keynes-Wicksell approach and the most recent approach. The neo-classical analysis by Tobin. Johnson, Sidrauski, Levhari and Patinkin can be characterized by the assertion that the rate of capital formation is always equal to ex ante savings and that equilibrium always exists in all markets regardless of the degree of price change. The Keynes-Wicksell analysis by Stein, Rose, is characterized by the argument that commodity markets are in a state of disequilibria. Most recent analysis by Turnovsky, The Post-Keynesians, and so on, has attempted to integrate different models offered by many scholars into a dynamic macroeconomic theory. Monetary growth theories have provided a new analytical framework and raised some new issues related to discussions of the optimal rate of monetary expansion and the effectiveness of stabilization policy. However, in order to expand and improve the current dimension of the monetary growth theories, the influence upon growth of international economic relations, money-supply process, labor market mechanisms and government activities must be made clear.

      • KCI등재

        시간적 거리를 통한 단절의 서술행위― <젊은 날의 초상>에 대해 ―

        김형규 한국현대소설학회 2003 현대소설연구 Vol.- No.18

        본고는 <젊은 날의 초상> 삼부작에 나타난 이야기의 구조와 서술양상을 살펴보았고, 이를 통해 서술 주체가 자신의 의도를 관철하기 위해 행하고 있는 서술 원리를 찾아보았다. <하구>, <우리 기쁜 젊은 날>, <그 해 겨울>의 삼부작의 형태로 된 이 작품은 이야기의 차원에서 보면 병렬적 구조, 삽화적 구조, 여로형의 구조로 각각 독립적인 이야기 구조를 지닌다. 하지만 여로형의 구조를 지닌 <그 해 겨울>을 제외하고는 <하구>와 <우리 기쁜 젊은 날>의 병렬적 구조와 삽화적 구조는 서사적 인과성을 약화시킬 수밖에 없다. 삼부작의 서술양상은 기본적으로 ‘나’로 지칭되는 일인칭 화자의 형태를 동일하게 지니고 있으면서 회상과 기억의 형식, 부정과 논평의 태도 그리고 암시와 해명의 서술구조를 전체적으로 유지하고 있어 한 편의 장편소설로서의 유기성을 이루고 있다고 할 수 있다. 하지만 이러한 서술양상은 인물의 초점과 서술의 초점을 시간적인 거리를 가지고 분리하는 과거 서술의 형태를 지니면서 이야기와 서술의 차원이 선명하게 구분되어 전개가 된다. 그리고 이야기 차원의 과거는 서술의 차원인 현재시점의 ‘나’에 의해 철저하게 부정되어 현재와의 단절감이 부각된다. 이러한 시간적인 거리를 통한 분리와 단절은 이야기 차원에 대해 현재시점의 ‘나’가 행하는 서술의 차원이 일방적인 우위를 지니며 전개된다. 이런 관계는 이야기와 서술의 역동적인 관계를 단절시켜 독자의 이야기에 대한 능동적인 참여도 단절시키는 결과를 초래한다. Discontinuous act of Narration Through Distance of time

      • Tobin의 貨幣的 成長理論에 대한 批判

        金亨圭 慶北大學校 師範大學 1984 敎育硏究誌 Vol.26 No.-

        Most growth models, whether they would be of the Keynesian-Kaldor, Harrodian or Solow-Swan type, ignore or at least minimize the role of the money in the process of accumulation and growth. In general, real factors rather than monetary phenomena are emphasized. Monetary growth model is concerned with the influence of money on the rate of growth and the steady-state characteristics of a growing economy. The purpose of this paper is to study on the recent development of monetary growth models, to examine closely the effect of money to the rate of economic growth and to criticize Tobin's model. Tobin has attempted to study the relationship between money and growth but his system is defective as it omits the construction of a demand for capital schedule by entrepreneurs that can be formulated independently of the savings propensity and portfolio decisions of households. Tobin's argument is based on the fact that the balanced growth at full employment requires the stock of capital to increase at the same rate as the natural rate of growth of the effective labor force, which Tobin assumes constant. Tobin's work is, therefore, directed towards to the discovery of the adjusting mechanism in both nomnometary and monetary economies that will lead to this form of balanced growth. Tobin's analysis implies that entrepreneurs are, in long-run eguilibrium, obliged to accumulate at a rate determined by the savings behavior of the public. This is clearly contrary to the spirit of Keynesian analyais, in which the rate of accumulation depends on the desire of entrepreneurs to invest and not on savers' propensities. What is lacking from Tobin's system is an attack on the problem of the simultaneous determination of the total size of savings and the forms that the savings magnitude will take. One of the essential elements neceasary for this concomitant determination is the introduction and construction of an explicit demand for capital goods by investors that can be formulated independently of the savings propensity and portfolio decisions of households. Tobin's model has provided a new analytical framework and raised some new issue relating to the effectiveness of stabilization policies. But the criticizing of Tobin's model will surely direct the future research correctly.

      • 貧困의 槪念과 論爭

        金亨圭,安秉根 경북대학교 교육대학원 1990 논문집 Vol.22 No.-

        Absolute poverty is commonly defined as a situation in which basic needs for physical survival are not sufficiently satisfied. For example, S. Rowntree(1901) defined families as being in 'primary poverty' if their total earnings are insufficient to obtain the minimum necessities for the maintenance of merely physical efficiency. On the other hand, definitions of poverty in relative terms are based on norms that attempt to take express account of actual deprivation with respect to average levels of needs satisfaction in the society in question. In this relativist view, there are three major points of view:①theory of relative deprivation(townsend, 1974), ②defining poverty as the fraction of mean income or median income(Atkinson, 1975, Fuchs, 1967) and ③defining poverty as a certain lowest percentile of the income distribution(Miller and Roby, 1971). One thing does seem to have clearly established:namely, that there must be a relative definition of poverty. The only person seriously to have questioned is Sen(1983) who presents a case for an absolutist approach. He had outlined the case for using an absolute approach to poverty related to the notion of capability and argued that the dispute on absolute vs. relative conceptualisation of poverty can be better resolved by being more explicit on the particular space (3.g., commodities, incomes, or capabilities) in which the concept is to be bases.

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