http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
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.
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.
박균서(Park Kyun Seo),손철수(Son Chol Su),윤종경(Yun Jong Kyeong),최정열(Choi Jung Youl),박용걸(Park Yong Gul) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper is presented the test results to evaluate the healthiness of the ballast in subway. The test includes the dynamic load test in servicing Line the screen classification test of aggregates and the wear test. From the results, the aspect and the property of the ballast are evaluated. The dynamic load tests the relationship between the deterioration of the ballast and the fluctuation of loads. The assesexplain sment of impact factor based on the field test results in a good property of test blocks is proposed.