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터널 막장 전방의 지반 변화 예측을 위한 해석기법에 관한 연구
김영섭,김찬동,정용찬,이재성,유광호,Kim, Young-Sub,Kim, Chan-Dong,Jung, Yong-Chan,Lee, Jae-Sung,You, Kwang-Ho 한국터널지하공간학회 2004 터널기술 Vol.6 No.1
본 연구의 목적은 막장전방에 연약대가 존재할 때 터널 3차원 내공변위를 여러 가지 방법으로 해석하여 변위의 발생경향을 밝히고 지질변화를 예측하는 해석기법을 제시하는 것이다. 안정된 지하 암반에 터널을 굴착하게 되면, 터널 막장면을 포함한 무지보 굴착면 주위에 3차원적인 하중전이 현상이 나타나는데 막장 전방의 지반 상태가 변화하거나 연약대가존재하면 특정한 변위 경향을 보이는 것이 3차원 계측 및 수치해석결과 확인되었다. 그러므로, 시공중인 터널 내에서 3차원 절대 내공 변위를 측정하여 본 연구에서 제시된 계측해석 기법 (L/C비, $C/C_o$ 등)을 적용하면 터널 막장 전방의 지층변화나 연약대의 존재를 사전에 예측할 수 있을 것으로 판단된다. The purpose of this study is to present an analysis method for the prediction of the changes m ground conditions. To this end, three dimensional convergence displacements are analyzed in several ways to estimate the trend of displacement changes. Three-dimensional arching effect is occurred around the unsupported excavation surface including tunnel face when a tunnel is excavated in a stable rock mass. If the ground condition ahead of tunnel face changes or a weak zone exists, a diagnostic trend of displacement change is observed by the 3 dimensional measurement and numerical analysis. Therefore, the change of ground condition and the existence of a weak zone ahead of tunnel face can be predicted by monitoring 3-dimensional absolute displacements during excavation, and applying the methodology (the ratio of L/C, $C/C_o$, etc.) presented in this study.
김영섭 ( Young Sub Kim ),박영규 ( Yong Kyu Park ) 순천향대학교 사회과학연구소 2009 사회과학연구 Vol.15 No.2
본 연구는 재무제표 정보를 기반으로 지속가능한 이익을 측정하는 실증적인 모형을 제시한다. 이익의 지속가능성은 자산의 수익률을 통해서 측정되며, 이를 통해 영업이익의 추정이 가능하게 된다. 그리고 추정된 영업이익을 이용하여 E/P비율의 추정이 가능해 진다. 시장 E/P비율과 추정된 E/P비율의 차이를 이용한 포트폴리오를 구성하여 보유수익률을 계산해 본 결과 잔차가 큰 집단의 포트폴리오의 수익률이 잔차가 낮은 집단의 포트폴리오의 수익률 보다 높음을 발견했다. 이는 잔차가 클수록 지속가능한 이익에 대해 시장에서 과소평가 되어 있음을 보여주는 실증적 증거이다. This paper provides a structured financial analysis that informs about the sustainability of earnings and E/P ratios. The E/P ratio measures the amount that investors pay for a dollar of current earnings. Investors buy futures earnings, so should pay less for current earnings if the earnings cannot be sustained in the futures. If earnings are temporarily high, investors should pay less per dollar of earnings than if earnings were temporarily depressed. While income statements identify some transitory items, the investor is still left with uncertainty as to whether the remaining earnings are sustainable. This paper estimates a model that supplies probabilities of the sustainability of earnings. The model aggregates information in the financial statements into a composite score that serves as a red flag about the sustainability of earnings. In empirical tests, the scoring identifies non-sustainable earnings, and also explains cross-sectional differences in E/P ratios. The paper also finds that stock returns are predictable when traded E/P ratios differ from a line fitted to sustainable earnings scores. So, the analysis either points investors to stocks with different risk or to stocks where earnings are mispriced given the information about their sustainability.
UNILEX 판례분석과 계약당사자의 책임체계에 관한 PICC의 법적 기준
김영섭(Young-Sub Kim),심종석(Chong-Seok Shim),유혜영(Hwe-Young Yu) 한국무역연구원 2021 무역연구 Vol.17 No.1
Purpose The purpose of this study is to the analysis of citation index and legal standards for the responsibility of contracting parties under PICC. that are determined thereunder in order to provide academic implication to enhance the appropriate utilization thereof. Design/Methodology/Approach This paper uses the literature research in PICC. Findings The legal standards for the responsibility of contracting parties under PICC. Research Implications This study focused on legal cases for PICC integrated into UNILEX. Its contents are analyzed for the main features;subdivided by the frequency of references to case-specific PICC articles;and extrapolated the legal standards of ranking PICC articles to present the results. This study aims to enhance the foreseeability and legal stability of disputes arising from the responsibility system of contracting parties in international commercial contract. Top Citation frequency in PICC’ articles are following; good faith and fair dealing;definition of hardship;intention of the parties;interest for failure to pay money;relevant circumstances;certainty of harm;force majeure;effects of hardship;right to terminate the contract;full compensation;inconsistent behavior;co-operation between the parties;right to damages;freedom of contract;interpretation of statements and other conduct;mitigation of harm;foreseeability of harm;agreed payment for non-performance;usages and practices;negotiations in bad faith;all terms to be given effect;contract to be observed and so on.