• Journal of the Korean Geotechnical Society
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• v.16 no.5
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• pp.141-148
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• 2000

사면 안정 해석은 주로 파괴 활동면의 전단 강도와 발휘되는 전단 강도의 최대비로서 표현되는 파괴활동의 추정을 위해 기존의 고전적인 방법을 사용하거나 이와 유사한 방법등이 사용되어 왔다. 이러한 방법들은 토질에 있어서의 상호 작용력과 그에 따른 전당력 및 사면 활동면의 반복되는 추정등의 가정으로 불확실성을 내포하고 있다. 본 연구에서는 토질전체를 연속체로 규정하고 비선형 유한요소법을 이용한 토질의 실제 응력과 강도를 정확하게 계산하였다. 사면 안정은 점차적 인증력의 증가로서 사면의 붕괴 활동면이 나타나FEo 까지로 해석되었다. 제시된 방법의 세부적인 사항은 예제를 통하여 설명되어 있다.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.129-132
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• 2006

This study was to examine the relationship between golf participation level(frequency, duration, intensity) and sub-factors of social development, which are activity, stability, control, sociality, and autonomy. The population for the study were citizens who participated in golf at Daejeon city. 281 golf participants were selected through random sampling. The collected data were analyzed by t-test, One-way ANOVA, and post-hoc analysis. The results were as follows; First, there were differences in stability and sociality according to frequency of golf participation. Second, there were differences in activity, stability, and control according to duration of golf participation. Third, there were differences in activity, control, and sociality according to intensity of golf participation.

• 한국벤처창업학회:학술대회논문집
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• 2023.04a
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• pp.59-62
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• 2023

100세 인생 시대의 도래는 사회적으로 많은 변화를 요구하고 있다. 기성세대들이 기존의 조직구조 속에서 일할 수 있는 최고 연령이 60대 초반인 것을 감안한다면 100세 인생 시대에는 퇴직한 후에 3~40년간 살아나갈 대안이 있어야 한다는 것이다. 이러한 환경 속에서 일반 직장인들에 비해 직장에서 많은 시간과 노력을 하고 있는 경찰관들이 퇴직 후에 경제활동을 지속하게 하는데 영향을 미치는 요인에 대한 연구를 하는 것이 중요하다고 생각한다. 따라서 본 연구는 정년을 마친 후 연금을 받게 되는 경찰관들이 다른 직종의 직장인들과 비교하여 경제활동에 대한 필요성을 느낄 것인가? 그렇다면 그 이유는 무엇인가? 퇴직 후에도 경제활동을 하려는 경찰관들에게 어떠한 요인들이 영향을 주는 것일까? 등에 대한 것을 기존 연구와 문헌들을 통하여 연구 모형과 가설을 정하고 설문 조사를 통해 실증적으로 분석하고자 한다. 본 연구는 재직 경찰관들이 퇴직 후에 경제활동을 지속하기 위한 의도에 영향을 미치는 요인에 관한 연구를 위해 개인역량, 경제활동 동기, 돈과 경제에 대한 인식, 경제적 만족도와 직장 안정성, 직장 공정성과 상하관계, 교육 및 교육 참여, 은퇴 준비, 직무만족과 직무의 미래비전을 독립 변수로 하고 경제활동 지속의도를 종속 변수로 설정하여 진행하였다.

• Proceedings of the Korean Geotechical Society Conference
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• 2006.03a
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• pp.20-27
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• 2006

중국 Three Gorges Project의 대수로사면 안정성은 설계와 시공측면에 있어 주요 관심사가 되었다. 사면 굴착으로 인한 제하과정에서 암반은 역학적으로 불안정한 상태에 놓인다. 본 논문은 FEM(2D-3D)를 이용하여 단층 암반 굴착으로 인한 암반사면의 안정성을 평가하였다. 해석결과 굴착 후 수로사면의 양측 수직벽과 분리울타리의 중간 상부에서 인장응력과 전단손상영역이 주로 발생하였다. 해석결과를 토대로 대규모 사면활동에 대한 안정성을 확인하였으나 시공단계에서 국부적 사면활동을 방지하기 위한 록볼트와 록앵커 등의 보강이 필요한 것으로 검토되었다.

• The Journal of Engineering Geology
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• v.14 no.4 s.41
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• pp.451-460
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• 2004

The strength of sliding plane is usually assigned on the whole sliding plane with same value in 2D limit equilibrium slope stability method. However, the potential sliding plane is divided into two or three parts which have different sliding resistances. According to the calculation results of 3D slope stability analyses using 4 types of slope cutting models, marginal sliding resistance could affect the safety of slope significantly. In this calculation two kinds of the sliding plane strengths were applied differently to the parts of bottom and margin of the model slope. The effect of marginal resistance was calculated quantitatively. In case of lower sliding resistance of the bottom, the safety factor becomes low in a margin cutting model. However, in case of higher sliding resistance of the bottom, the safety factor decreased slightly in a lower part cutting model and increased in a upper margin cutting model.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.237-247
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• 2022

This study predicts the economic activity level of the elderly in Korea using various machine learning methods. While the previous studies mainly focused on testing the relationship between the economic activity level and the life satisfaction or the social security system, this study aims at the accurate prediction on the economic activity level of the elderly using various machine learning methods and the forecast combination. Dependent variables such as the activity rate, employment rate, etc and independent variables such as the income, average wage, etc compose the dataset in this study. Five different machine learning methods and two forecast combinations are applied to the given dataset. The prediction performances of the machine learning method and the forecast combination varied across the dependent variables and prediction intervals, but it was found that the forecast combination was relatively superior to other methods in terms of the stability of prediction. This study has significance in that it accurately predicted the economic activity level of the elderly and achieved the stability of the prediction, raising practicality from a policy perspective.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.21 no.6
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• pp.495-507
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• 2009

The expected sliding distance for the lifetime of a caisson breakwater has a limitation to be used as the stability criterion of the breakwater. Since the expected sliding distance is calculated as the mean of simulated sliding distances for the lifetime, there is possibility for the actual sliding distance to exceed the expected sliding distance. To overcome this problem, the exceedance probability of the allowable sliding distance is used to assess the stability of sliding. Latin Hypercube sampling and Crude Monte Carlo simulation were used to calculate the exceedance probability. The doubly-truncated normal distribution was considered to complement the physical disadvantage of the normal distribution as the random variable distribution. In the case of using the normal distribution, the cross-sections of Okgye, Hwasun, and Donghae NI before reinforcement were found to be unstable in all the limit states. On the other hand, when applying the doubly-truncated normal distribution, the cross-sections of Hwasun and Donghae NI before reinforcement were evaluated to be unstable in the repairable limit state and all the limit states, respectively. Finally, the shortcoming of the expected sliding distance as the stability criterion was investigated, and we reasonably assessed the stability of sliding of caissons by using the exceedance probability of allowable sliding distance for the caisson breakwaters in Korea.

• Journal of the Korean Geophysical Society
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• v.5 no.2
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• pp.111-129
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• 2002

Generally, investigation methods of cut slope are conucted only geological surface survey to gain engineering geological data of cut slopes. These methods have many problems such as limitations of investigation for a special area. So geophysical investigations such as geotomography, seismic and electrical resistivity methods have been used to search for failure surface in potential failure slopes or failed slopes. But investigation method using the borehole camera is recently a used method and it is thought that this method is more reliable method than other investigation methods because of being able to see by the eyes. Therefore, this paper was conducted investigations of borings and BIPS(Borehole Image Processing System) to search for potential sliding surfaces and was applied to obtain information of discontinuity on failed and potential failure slope in highway. As the results of BIPS, we could decide potential sliding surface in the slope, conducted to check slope stability and decided slope stability measures.

• 한국벤처창업학회:학술대회논문집
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• 2023.11a
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• pp.107-110
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• 2023

인센티브는 조직 내 개인의 동기와 행동에 영향을 미쳐 조직의 목표를 달성하는 데에 중요한 역할을 한다. 기존 문헌에서는 이러한 관점에서 개인의 다양한 동기를 충족시킬 수 있는 경제적, 사회적 보상에 대하여 논의해왔다. 반면, 직업안정성이 개인에게 기업가적 동기를 가진 개인에게 어떠한 인센티브로 작용할 수 있는지에 대한 내용은 간과된 측면이 있다. 본 연구는 창업휴직제도가 직업안정성이라는 비금전적 인센티브로 작용하여, 기업가적 동기를 가진 직원들의 기업벤처링(Corporate Venturing) 활동 참여에 긍정적인 영향을 줄 수 있는지 여부를 조사한다. 본 연구는 전통적인 인적자원관리 문헌에서 비금전적 인센티브를 통해 개인의 일탈과 이직을 방지하려는 관점과는 달리, 개인이 일을 중단하는 것을 허가하는 '창업휴직제도' 자체가 비금전적 인센티브로서 개인이 혁신 성과를 증가시킬 수 있다는 점에 집중한다. 정부출연연구소 내부 기업벤처링 프로그램에 참여한 세 명과의 개인 인터뷰를 통해 이러한 가설을 지지할만한 단서를 발견하였으며, 이를 바탕으로 향후 실험 연구를 통해 실증 분석을 진행하고자 한다.

• Journal of the Korean GEO-environmental Society
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• v.2 no.2
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• pp.41-50
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• 2001

In this study, for the stability analysis of marine embankment, the slope stability analysis and possibility of lateral movement with the marine embankment in ${\bigcirc}{\bigcirc}$harbor were carried out. In order to simulate the practical site condition, the expected maximum sea water level and maximum embankment height were assumed for these analyses. For the evaluation of soil properties, field test, laboratory test, and especially chemical composition analysis were performed for the this analysis. Based on these test results, the soil parameters were determined by applying ground improvement concept under columnar stabilized ground condition and also the effect of staged backfilling was considered under the dredged ground condition. For the optimal design, the stability analyses of embankment with changed height and unchanged height were performed under unimproved soil condition. The result showed that both cases were unstable not only with slope stability but also with lateral movement. Therefore, Deep Mortar Piling was applied for stability analysis and this result was safe. As the conclusion, the deep mortar piling method was suggested as reinforced foundation design for this site.