• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.643-650
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• 2004

In general, slope failures are occurred by the interaction among various factors(slope shape, hydraulic condition, and geologic condition, etc.). In the area where has a heavy rainfall, a great portion of slope failures are caused by seepage increasement with suitable failure condition. Many studies have been performed to find the cause of large-scale failures. In this study, three Cut-Slope failures caused by typhoon 'MAEMI' were investigated to find out factors causing large-scale slope failures. It was confirmed in this research that major reason of slope failures was the weak layer working along with other unstable factor. The large-scaled investigation concerning Cut-Slope will be needed to find out the Weak Layer.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 추계학술대회 논문집
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• pp.184-188
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• 2000

The improved Green integral equation of overdetermined type applied to the radiation problem for an oscillating cylinder in the presence of weak current is presented. A two-dimensional Green function for the weak current is also presented. The present numerical solution of the Improved Green integral equation by the B-spline higher order Kelvin panel method is shown to be free of irregular frequencies which are present in the usual Green integral equation.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제12권1호
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• pp.31-40
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• 2023

교통약자의 이동권을 보장하기 위해서 이동지원 편의시설 확충, 특별교통수단 공급, 데이터·AI 기반으로 이동패턴 분석으로 대중교통 노선 계획 및 요금정책 수립 등 국내외에서는 다양한 정책과 서비스가 시행되고 있다. 그러나 서비스 이용자인 교통약자 관점에서 필요한 상황에서 원하는 교통수단을 보다 편리하게 이용하기에는 여전히 서비스 편의성을 향상시키기 위한 연구가 필요하다. 본 연구에서는 교통약자 이동편의 증진을 위한 정책과 서비스를 살펴보고, 교통약자 이동지원을 위한 마이데이터 기반 서비스 모델을 제시한다. 제시한 서비스 모델에서는 교통약자가 개인별 상황에 따라 교통수단을 자유롭게 선택하여 이용할 수 있고, 국가 또는 지자체가 제공하는 교통복지 바우처 혜택을 동일하게 제공받을 수 있다. 제시한 서비스 모델은 개인데이터를 안전하게 수집하고 활용할 수 있도록 지원하는 마이데이터 플랫폼, 마이데이터 기반으로 교통복지 수혜 대상자 인증, 서비스 이용 후 요금정산을 위한 결제 기능을 핵심 구성요소로 정의하고 있다. 본 연구에서는 제시한 서비스 모델을 구현하고 대전시의 교통약자를 대상으로 실증서비스를 실시함으로써 이용자 관점에서의 서비스 만족도를 조사하였다.

• 품질경영학회지
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• 제13권1호
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• pp.41-50
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• 1985

The purpose of this study is to consider the criteria for decision-making of industrial location in view of substituting production factors through maximizing profit instead of minimizing transportation cost. This paper makes use of mutual relationship between spatial economy in Euclidean distance and substituting production factors in production theory. Therefore, this paper will develop weak points in classical theory of industrial location by introducing production theory which has conception of substituting production factors.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 추계학술대회 논문집(II)
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• pp.826-833
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• 2002

In recent years, due to the continuous concentration of population and sharp increment of commuters around Seoul metropolitan area, traffic jam has become one of severe problems along with housing in this area. In oder to solve the problem like the one mentioned above, several countries such as Japan, France and so on gradually operate double deck trains as efficient, reliable and comfortable mass transportation systems. However, the double deck train has weak points such as big cross sectional area and high mass center that cause unsafe vehicle running performances and interface problems between the vehicles and infrastructures. Therefore, prior to operate double deck trains on the existing lines, careful investigations should be performed. For these reasons, we have investigated foreign double deck trains and studied the technologies for a double deck train as an alternative way to carry heavy transportation efficiently and comfortably.

• Natural Product Sciences
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• 제8권3호
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• pp.90-93
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• 2002

The purgative activity of Seunggitang prescriptions (Deseunggitang, Soseunggitang and Joweseunggitang) was measured to compare the laxative potency of these herbal prescriptions. Daeseunggitang and Jowiseunggitang more potently stimulated the transportation of small and large intestine than Rhei Rhizoma alone. However, the small and large intestine transportation activities of Soseunggitang were similar to those of Rhei Rhizoma alone. Soseunggitang inhibited nitrite production in LPS-induced RAW 264.7 cells and trypsin than the other Seunggitangs. The inhibitory activity of Jowiseunggitang was more potent on nitrite production in LPS-induced RAW 264.7 cells than those of Daeseunggitang. These results suggest that Daeseunggitang can be used as a emergent purgative for patients with severe fever and constipation, Soseunggitang can be as a mild purgative for chronic constipation with inflammation and Jowiseunggitang can be as a potent purgative for patients for severe constipation and weak colitis.

• 산업공학
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• 제7권2호
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• pp.145-155
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• 1994

In this paper, we analyzed weak points of press process with the rolled thin flexible plate. The problems which are caused by the adhesion of blank on the surface of die and the separation of blank from scrap during its transportation after blanking were solved by the redesign of the structure of die and the development of special equipment for material handling. It is our purpose to make better the automation of blanking process and the safety for worker by the improvement of flexible material handling.

• 한국철도학회논문집
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• 제15권2호
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• pp.193-198
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• 2012

2004년 이후 철도안전에 대한 투자확대의 결과로 철도사고 발생건수 및 관련피해는 지속적으로 감소하여 2009년 이후에는 선진국 수준의 안전성을 유지하고 있다. 그러나 이러한 사고율 개선에도 철도안전에 대한 국민의 우려는 감소하지 않고 있으며, 추가적인 개선을 요구하고 있다. 본 연구에서는 국내 철도안전의 현재 수준에 대한 정량적 평가를 통해 철도안전에 대한 목표설정, 안전대책마련 등의 정책 수립에 활용할 수 있도록 하였다. 철도사고에 대해 철도 사고율이 낮은 선진국 및 도로교통 사고율과 정량적인 비교연구를 수행하였다. 또한 사고 종류별 원인분석을 통해 현재 철도안전수준의 평가를 위한 기초자료를 마련하였다.

• 한국건축시공학회지
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• 제14권3호
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• pp.266-272
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• 2014

The Leadership in Energy and Environmental Design (LEED) Green Building Rating System provides third-party verification for environmentally sustainable construction. But while LEED-certified buildings provide healthier work and living environments, Previous studies have shown that LEED certification does not provide any direct economic incentives to owners and developers. To address this issue, this study aims to investigate the economic benefits of LEED criteria. The objective of this study is to examine whether or not there is a significant correlation between median household income and the number of bus stops and light rail stations for a given parcel that meet LEED sustainable site criteria for public transportation access. The findings showed that the number of bus stops had a positive correlation with median household income, which means that more bus stops a given parcel had that met LEED criteria, the greater the median household income of a block group where the given parcel was located would be, though this positive correlation was very weak.

• 한국조경학회지
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• 제31권3호
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• pp.74-82
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• 2003

Under the assumption that the temperature of one location is closely related to land use characteristics around that location, this study is carried out to assess the impact of urban land use patterns on air temperature. In order to investigate the relationship, GIS techniques and statistical analyses are utilized, after spatially connecting urban land use data in Seoul Metropolitan Area with atmospheric data observed at Automatic Weather Stations (AWS). The research method is as follows: (1) To find out important land use factors on temperature, simple linear regressions for a specific time period (pilot study) are conducted with urban land use characteristics, (2) To make a final model, multiple regressions are carried out with those factors and, (3) To verify that the final model could be appled to explain temperature variations beyond the period, the model is extensively used for 5 different time periods: 1999 as a whole; summer in 1999; 1998 as a whole; summer in 1998; August in 1998. The results of simple linear regression models in the pilot study show that transportation facilities and open space area are very influential on urban air temperature variations, which explain 66 and 61 percent of the variations, respectively. However, the other land use variables (residential, commercial, and mixed land use) are found to have weak or insignificant relationship to the air temperatures. Multiple linear regression with the two important variables in the pilot study is estimated, which shows that the model explains 75 percent of the variability in air temperatures with correct signs of regression coefficients. Thus, it is empirically shown that an increase in open space and a decrease in transportation facilities area can leads to the decrease in air temperature. After the final model is extensively applied to the 5 different time periods, the estimated models explain 68 ∼ 75 percent of the variations in the temperatures is significant regression coefficients for all explanatory variables. This result provides a possibility that one air temperature model for a specific time period could be a good model for other time periods near to the period. The important implications of this result to lessen high air temperature we: (1) to expand and to conserve open space and (2) to control transportation-related factors such as transportation facilities area, road pavement and traffic congestion.