이슈진단 : 항만의 국가경쟁력 제고를 위한 방안

박균도 한국해사문제연구소 1997 (月刊)海洋韓國 Vol.287 No.-

사례분석을 통한 석축(돌쌓기옹벽)의 붕괴원인 및 안정을 위한 연구

박균서(Kyunseo Park),허성훈(Sounghun Heo),이영대(Youngdai Lee) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.6

Masonry retaining walls, which have been used since long time, have recently been widely used in the construction of small complexesas an easy-to-purchase material and eco-friendly structure. Disasters owing to the collapse of these masonry retaining walls have frequently occurred over time. The purpose of this study is to quantitatively evaluate the causes for the collapse of masonry retainingwalls by collecting and analyzing collapse data using collapse phenomenon field trips, literature review, and search tools, and to use this analysis data, to suggest measures to prevent the collapse of masonry retaining walls. As a result of collecting and analyzing collapse case data, this study found that the main causes of masonry retaining wall collapse were the loss of foundation ground (scour), ground displacement owing to the excavation of adjacent land, settlement owing to ground softening because of rainfallinfiltration, poor drainage, and inclination of stonework. The causes for collapse were of eight types, including slope sliding additionalloading, and vibration, and 16 types when literature data were included. An analysis of the collapse frequency based on the causes for collapse revealed that the two causes for collapse, foundation and drainage, accounted for approximately 60% of the total cause,and measures for stability and Governing law of critical factor were proposed using this result. 요 지오래전부터 인류와 함께한 석축(돌쌓기옹벽)은 최근에도 소규모단지 조성에 재료 구입이 쉽고 친환경인 구조물로서 많이사용되어지고 있다. 이러한 석축이 시간이 경과함에 따라 붕괴에 따른 재난이 종종발생하고 있는 실정이다. 이번 연구의목적은 붕괴현상 답사 및 문헌조사와 검색도구를 이용하여 석축붕괴자료를 수집 분석하여 석축 붕괴원인을 정량적으로평가하고, 이 분석 자료를 이용하여 석축붕괴예방을 위한 대책을 제시하는 데 있다. 붕괴 사례자료를 수집 분석한 결과이번 연구에서 석축붕괴의 주요 원인으로는 기초지반유실(세굴), 인접지 굴착 등에 의한 지반변위, 강우침투에 의한 지반연약화에 의한 침하, 배수불량, 석축의 경사, 사면활동, 추가 하중재하 및 진동 등 8가지로 나타났고 문헌자료 포함 시 16가지로 나타났다. 붕괴원인별 붕괴빈도를 분석한 결과 기초 및 배수 두 가지 붕괴원인이 전체의 약 60%를 차지하는 것으로 나타났으며,이를 이용하여 안정대책과 한계요인 지배의 법칙을 제시하였다.

Synthesis of Polymerizable Chiral Dopant for Cholesteric LC with Switchable Broadband IR-Reflector

박균도,심재민,강신웅,이명훈 한국고분자학회 2012 한국고분자학회 학술대회 연구논문 초록집 Vol.2012 No.10

가을철 동해 표층 수온과 태평양 순년 진동의 상관성 분석

박균도,PAK, GYUNDO 한국해양학회 2019 바다 Vol.24 No.4

다양한 표층 수온 자료를 통해 1979년부터 2018년 기간 동안의 가을철 동해 공간 평균 표층 수온이 태평양 순년 진동과 높은 상관관계를 나타내는 것을 확인하였다. 이 해역에서 제트류의 활동이 가장 강한 200 hPa에서의 바람과 동해 표층 수온의 회귀 분석 결과, 가을철 동해 표층 수온이 상승할 때 제트류의 중심축이 북상하면서 전반적으로 제트류가 약화하는 경향을 보이며, 동해 수온이 하강할 때는 제트류의 중심축이 남하하면서 제트류가 강화되는 경향을 보였다. 이러한 분석 결과는 제트류의 강도 변화와 중심축의 남북 진동이 동해 표층 수온과 태평양 순년 진동의 커플링과 관련되어 있음을 시사한다. 여름철의 약한 제트류와 겨울철 및 이른 봄철의 강한 동아시아 동계계절풍 효과는 동해와 태평양 순년 진동의 커플링이 가을철 외의 다른 계절에 잘 나타나지 않게 하는 이유로 생각해볼 수 있다. Analyses with various Sea Surface Temperature (SST) products indicate that the interannual variability of the area-averaged SST in the East/Japan Sea (EJS) is well correlated to that of Pacific Decadal Oscillation (PDO) during 1979-2018, especially in the autumn. The regression analysis with the wind vectors at 200 hPa, where the strongest jet stream flows, suggests that the long-term variability of the intensity as well as the meridional movement of the jet stream are related to the coupling of the autumn EJS SST and PDO. When the axis of the jet stream moves poleward (equatorward) with its weakening (strengthening), both the EJS SST and North Pacific SST increase (decrease). This suggests that both the intensity and meridional movement of the jet stream are possibly related to the coupling of the autumn EJS SST and PDO. However, effects of a weak jet stream during the summer and the strong East Asian winter monsoon make weak coupling between the EJS SST and PDO.

서유럽 신규원전 설계 안전성 지침에 대한 이해

박균,김대준,정병준 한국에너지학회 2015 한국에너지공학회 학술발표회 Vol.2015 No.4

Lagrangian Approach for a New Separation Index of the East Korea Warm Current

박균도,김영호,박영규 한국해양과학기술원 2019 Ocean science journal Vol.54 No.1

In this study, a separation index for the East Korea Warm Current (EKWC) is defined by Lagrangian particle tracking using surface geostrophic currents based on satellite-observed absolute dynamic topography. After determining the main stream from the inflow through the western channel of the Korea Strait, the separation index is obtained by averaging the latitude of the main particle trajectories crossing the meridian along 130.5°E. Although the separation index is obtained from coastal velocity, it describes well the surface circulation patterns in the Ulleung Basin. When it is low (i.e., the EKWC separates at low latitude), the flow toward the Japanese coast is the strongest and the EKWC is weak. In the middle phase of the separation index, a large portion of the EKWC meanders and forms the Ulleung Warm Eddy-like feature. When the separation index is high, the EKWC stretches further northward to almost 40°N. Therefore, the separation index could be used as a simple representation of the surface circulation pattern in the East/Japan Sea.

[군중의 목소리] 우리 말에 외래어를 함부로 섞어쓰지 말았으면

박균 길림성민족사무위원회 1987 중국조선어문 Vol.- No.1987-3

Korea Institute of Ocean Science and Technology Earth System Model and Its Simulation Characteristics

박균도,노의근,이명인,예상욱,김대현,김상엽,이준리,이호진,현승훤,이광연,이재학,박영규,진현근,박혁민,김영호 한국해양과학기술원 2021 Ocean science journal Vol.56 No.1

We document the performance of a new earth system model developed at Korea Institute of Ocean Science and Technology, called the KIOST-ESM, based on a low-resolution (~ 200 km for the atmosphere, ~ 100 km for the ocean) version of the Geophysical Fluid Dynamics Laboratory Climate Model 2.5. The main changes made to the base model include adopting a unified convection scheme for cumulus convection and an ocean mixed layer parameterization considering Langmuir circulation, which improve the model fidelity significantly. In addition, the KIOST-ESM adopts a new soil respiration scheme in the dynamic vegetation process of its land component. The performance of the KIOST-ESM was assessed in pre-industrial and historical simulations that are made as part of its participation in the Coupled Model Intercomparison Project phase 6 (CMIP6). The response of the earth system to increasing greenhouse gas concentrations was analyzed in the ScenarioMIP simulations. An abrupt quadrupling of CO2 experiment suggests that the equilibrium climate sensitivity of KIOST-ESM is 3.36 K—very close to the averaged one obtained from CMIP5 simulations. Although the KIOST-ESM showed a notable cold bias in the Northern Hemisphere and the double Inter-Tropical Convergence Zone bias, the KIOST-ESM outperforms the base model in simulating the mean sea surface temperature over the Southern Ocean and over the cold tongue in the tropical Pacific. The KIOST-ESM can also simulate the dominant tropical variability in intraseasonal (Madden–Julian Oscillation) and interannual (El Niño-Southern Oscillation) timescales more realistically.

Comparisons of Net Heat Flux Data Sets Over the Western North Pacific

박균도,Jae-Hyoung Park,Jae-Hyoung Park,박영규,장유순 한국해양과학기술원 2020 Ocean science journal Vol.55 No.4

This study focuses on the intercomparisons of 22 net heat flux (NHF) data sets in terms of mean, linear trend, and interannual variability during 1993–2007 over the western North Pacific and its surrounding waters. The data sets can be categorized into the dominant group that shares common interannual variabilities and the outcasts that exhibit exceptional variability. Based on our analysis, we provide guidelines for users to choose reliable NHF data sets in the study regions. In addition, many NHF data sets tend to represent similar interannual variabilities in the marginal sea regions, whereas the opposite is true in open oceans where interannual variability is weak. Also, we find an evidence showing the mean biases of the NHF are mainly due to the difference in calculation of the latent heat flux. The aforementioned information will be useful for a wide community of scientists who are interested in using heat flux data.

한국음악-유럽식 기보로 역보(譯譜)된 17개 악곡들에 대한 최초의 소개 및 논평

박균 서울대학교 동양음악연구소 2016 동양음악 Vol.40 No.-