• 한국해양공학회지
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• 제32권6호
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• pp.447-457
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• 2018

In this study, a two-dimensional fully nonlinear transient wave numerical tank was developed using a desingularized indirect boundary integral equation method. The desingularized indirect boundary integral equation method is simpler and faster than the conventional boundary element method because special treatment is not required to compute the boundary integral. Numerical simulations were carried out in the time domain using the fourth order Runge-Kutta method. A mixed Eulerian-Lagrangian approach was adapted to reconstruct the free surface at each time step. A numerical damping zone was used to minimize the reflective wave in the downstream region. The interpolating method of a Gaussian radial basis function-type artificial neural network was used to calculate the gradient of the free surface elevation without element connectivity. The desingularized indirect boundary integral equation using an isolated point source and radial basis function has no need for information about the element connectivity and is a meshless method that is numerically more flexible. In order to validate the accuracy of the numerical wave tank based on the desingularized indirect boundary integral equation method and meshless technique, several numerical simulations were carried out. First, a comparison with numerical results according to the type of desingularized source was carried out and confirmed that continuous line sources can be replaced by simply isolated sources. In addition, a propagation simulation of a $2^{nd}$-order Stokes wave was carried out and compared with an analytical solution. Finally, simulations of propagating waves in shallow water and propagating waves over a submerged bar were also carried and compared with published data.

• 한국산림과학회지
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• 제111권1호
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• pp.81-99
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• 2022

백두대간은 생물종이 다양하고 풍부한 한반도의 핵심 생태축으로 남한에서 향로봉부터 지리산 천왕봉까지 약 701 km에 이른다. 덕유산권역(늘재-육십령)은 남부권역에 속하며, 특히 덕유산은 입지환경 특성에 따라 다양한 식생이 나타나는 곳이다. 따라서 본 연구는 백두대간 늘재-육십령 구간의 식생현황을 조사하고 산림식생유형분류를 통해 향후 체계적인 보전 및 관리를 위한 기초자료를 제공하는데 목적이 있다. 식생조사는 2019년 5월부터 10월까지 수행하였으며 총 637개소의 조사를 실시하였다. 식생유형분류결과, 군락군수준에서는 신갈나무군락군으로 구분되었으며, 군락수준에서는 구상나무군락, 산오이풀군락, 여뀌군락, 굴참나무군락, 떡갈나무군락, 층층나무군락, 신갈나무전형군락으로 구분되었다. 구상나무군락에서는 퍼진고사리군, 가문비나무군으로 세분되었고, 굴참나무군락은 떡갈나무군, 굴참나무전형군으로 세분되었다. 본 연구를 통하여 아고산식생, 초지식생, 농경지식생 등 특이한 산림식생에 대한 보전 및 관리방안이 마련되어야 할 것으로 판단된다.

• 한국지리정보학회지
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• 제24권4호
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• pp.194-208
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• 2021

임진강 상류 북한지역에 위치한 황강댐은 약 3억 5천만m³ 규모의 저수지를 가지고 있으며, 하류로의 발전방류 이후 방류량 일부를 도수하여 예성강 유역의 생활, 공업, 농업용수를 공급하고 있는 것으로 알려져 있다. 이와 같은 황강댐의 유역변경식 용수공급으로 인해 임진강 하류로 흘러내려 오는 유량이 감소하여 우리나라의 용수공급, 하천유지유량, 수질 및 생태환경에 부정적인 영향을 미치고 있다. 하지만 남북접경지역의 특성상 수문자료의 공유가 원활하지 못하고 황강댐의 운영방식을 알 수가 없으므로 하류부 남한측 지역의 피해위험이 상존하고 있다. 이에 본 연구에서는 광학 원격탐사 영상을 기반으로 보정된 수문모형과 물수지 분석을 통해 장기유출 개념의 월별 도 수량을 산정하였다. 2019년 1월부터 2021년 9월까지의 물수지 분석결과 황강댐의 평균 도수량은 29.2m³/s로서 이는 연간 9.22억 톤에 해당하는 수자원 양이며, 황강댐에 유입되는 연평균 유입량인 20.2억 톤 중 45.6%를 차지한다.

• Journal of Korea Trade
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• 제24권6호
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• pp.101-114
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• 2020

Purpose - This paper examines the "Arrangement Concerning Mutual Assistance in Court-ordered Interim Measures in Aid of Arbitral Proceedings by the Courts of the Mainland and of the Hong Kong Special Administrative Region" (the Arrangement), which became effective on October 1, 2019, calling on courts of mainland China and Hong Kong for reciprocal commitment in support of court-ordered interim measures in aid of arbitral proceedings. Because the Hong Kong courts have granted interim measures in aid of arbitral proceedings seated in and outside of Hong Kong even prior to the Arrangement becoming effective, this paper focuses on the significance of the Arrangement making Hong Kong the first and only seat outside of mainland China from which parties to arbitral proceedings may successfully obtain interim measures to preserve of assets, properties, and/or evidence from Chinese courts to be enforced in China. Design/methodology - The significance of interim measures in international arbitration and the existing circumstances of interim measures in support of international arbitral proceedings in mainland China and Hong Kong are discussed first in this paper. Due to the confidential nature of arbitral proceedings, while the details of applications for interim measures pursuant to the Arrangement cannot be discussed, in examining the implications of the Arrangement, the relevant and necessary information was made available from the Hong Kong International Arbitration Centre, as it is one of the six qualified arbitral institutions under the Arrangement. Findings - This groundbreaking Arrangement provides a mechanism for parties with China-related matters to more effectively resolve their disputes, the opportunity for Hong Kong to become an unparalleled seat of arbitration, and for mainland China to overcome some of its negative perceptions in international arbitration. Because the Arrangement also allows parties to directly apply for interim measures from mainland Chinese courts, parties with China-related matters should take note of this potential bypassing of the procedural hurdle, which usually requires an arbitral institution to submit such applications in China, and make strategic decisions accordingly as may be appropriate. Originality/value - Because the Arrangement is a recent yet a significant agreement calling on courts of mainland China and Hong Kong for reciprocal commitment in support of court-ordered interim measures in aid of arbitral proceedings, this study will provide useful guidance for parties with China-related matters all over the world, especially in light of China's rapid economic growth and extensive and prominent trade relationships in today's world. Parties who foresee the need for interim measures from mainland Chinese courts should designate Hong Kong as their seat of arbitration and select one of the six qualified arbitral institutions under the Arrangement to administer their arbitral proceedings in order to benefit from the Arrangement.

• Animal Bioscience
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• 제36권2호
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• pp.256-263
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• 2023

Objective: Feed molecular structures can affect its availability to gastrointestinal enzymes which impact its digestibility and absorption. The molecular spectroscopy-attenuated total reflectance Fourier transform infrared vibrational spectroscopy (ATR-FTIR) is an advanced technique that measures the absorbance of chemical functional groups on the infrared region so that we can identify and quantify molecules and functional groups in a feed. The program aimed to reveal the association of intrinsic molecular structure with nutrient supply to animals from canola feedstocks and co-products from bio-oil processing. The objective of this study was to characterize special intrinsic carbohydrate and protein-related molecular structure spectral profiles of feedstock and co-products (meal and pellets) from bio-oil processing from two source origins: Canada (CA) and China (CH). Methods: The samples of feedstock and co-products were obtained from five different companies in each country arranged by the Canola Council of Canada (CCC). The molecular structure spectral features were analyzed using advanced vibrational molecular spectroscopy-ATR-FTIR. The spectral features that accessed included: i) protein-related spectral features (Amide I, Amide II, α-helix, β-sheet, and their spectral intensity ratios), ii) carbohydrate-related spectral features (TC1, TC2, TC3, TC4, CEC, STC1, STC2, STC3, STC4, TC, and their spectral intensity ratios). Results: The results showed that significant differences were observed on all vibrationally spectral features related to total carbohydrates, structural carbohydrates, and cellulosic compounds (p<0.05), except spectral features of TC2 and STC1 (p>0.05) of co-products, where CH meals presented higher peaks of these structures than CA. Similarly, it was for the carbohydrate-related molecular structure of canola seeds where the difference between CA and CH occurred except for STC3 height, CEC and STC areas (p>0.05). The protein-related molecular structures were similar for the canola seeds from both countries. However, CH meals presented higher peaks of amide I, α-helix, and β-sheet heights, α-helix:β-sheet ratio, total amide and amide I areas (p<0.05). Conclusion: The principal component analysis was able to explain over 90% of the variabilities in the carbohydrate and protein structures although it was not able to separate the samples from the two countries, indicating feedstock and coproducts interrelationship between CH and CA.

• 지역과문화
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• 제8권3호
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• pp.27-48
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• 2021

近年来, 中国的旅游演艺进行了一系列新项目的落成, 使旅游演艺产业的票房增加, 经济收入增高, 同时带动了旅游演艺的品牌形成, 而且拥有了一定的良好口碑, 对地域的文化传播, 经济发展都有一定的推动作用, 其中大型情景体验剧就是重点项目之一。大型情景体验剧是一种以模拟真实环境空间设计为空间, 使观众在视觉, 听觉, 嗅觉, 味觉和触觉等多位感官上进行主动式体验, 互动性极强的新戏剧形式。大型情景体验剧根据中国的传统文化, 地域文化, 流传已久的故事进行了改编, 又结合了灯光, 音效, 特效, 3D效果等高科技, 使观众的体验更加真实。《又见平遥》作为中国第一部大型室内情景体验剧, 以新的表现形式和创作手段来体现山西文化的博大精深。以情景体验剧的形式, 使观众更加直观地感受到了"山西人"的"山西情"和"山西德", 推动山西旅游业的发展, 带动山西地区的经济, 逐渐形成了完整的产业链。但也有剧情连接不顺及游客管理不当等局限, 可以通过更多的观众互动及指引完善演出效果。因此可以看出, 大型情景体验剧对地域在传统文化, 价值观的传播上, 旅游产业的发展上, 地域的品牌特色形成以及经济发展上都有很大的推动作用。通过这些, 可以看出大型情景体验剧对实景演出的发展具有创新思维内容, 逐渐形成产业链闭环以及拓宽宣传渠道等启示作用。

• 한국컴퓨터정보학회논문지
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• 제27권9호
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• pp.1-12
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• 2022

안과 환자의 질병을 판단하기 위해서는 특수 촬영 장비를 통해 찍은 안구영상을 이용한 안과의사의 주관적 판단의 개입이 전통적으로 활용되고 있다. 본 연구에서는 안과 의료진이 질병을 판단할 때 보조적 도움이 될 수 있도록 객관적 진단결과를 제시해주는 각막궤양 의미론적 분할방법에 대하여 제안하였다. 이를 위해 DeepLab 모델을 활용하였고 그 중 Backbone network으로 Xception과 ResNet 네트워크를 이용하였다. 실험결과를 나타내기 위한 평가지표로 다이스 유사계수와 IoU 값을 이용하였고 ResNet101 네트워크를 사용하였을 때 'crop & resized' 이미지에 대해 최대 평균 정확도 93%의 다이스 유사계수 값을 보였다. 본 연구는 객체 검출을 위한 의미론적 분할모델 또한 안구의 각막궤양 부분과 같은 불규칙하고 특이한 모양을 추출하고 분류하는데 뛰어난 결과를 도출할 수 있는 성능을 보유하고 있음을 보여주었다. 향후 학습용 Dataset을 양적으로 보강하여 실험결과의 정확도를 제고할 수 있도록 하고 실제 의료진단 환경에서 구현되어 사용되어 질 수 있도록 할 계획이다.

• 대한임상검사과학회지
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• 제55권1호
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• pp.29-36
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• 2023

이 연구는 특수건강진단 폐활량검사 시 아시안 외국인 근로자들에게 적절한 예측식을 제안하는 것이다. 연구 대상은 지리적 분포에 따라 중앙아시아, 동북아시아, 남아시아태평양 그룹으로 나누었으며, 그룹별 폐활량검사 결과와 예측식간 일치도를 확인하였다. 이를 기준으로 국내 외국인 근로자들에게 폐활량검사 시 적절한 예측식을 제안하였고, 제안한 예측식을 적용할 수 없는 폐활량검사기에는 보정계수를 제안하였다. Global lung function initiative 2012 (GLI2012)-동북아시안식과 동남아시안식의 해석일치도는 남성 0.819, 여성 0.770이었고, GLI2012-동남아시안식과 남아시안식의 해석 일치도는 남성 0.881, 여성 0.886이었다. GLI2012-동북아시안식과 중앙아시안식의 해석일치도는 남성 0.831, 여성 0.833이었다. 따라서 동북아시안, 중앙아시안 그룹에 속하는 외국인 근로자는 GLI2012-동북아시안식을 적용하고, 동남아시안, 남아시안 그룹에 속하는 외국인 근로자는 GLI2012-동남아시안식을 제안한다. GLI2012-동남아시안식을 선택할 수 없는 폐활량검사기의 경우 최정근식(Dr. Choi equation)에 보정계수 0.87을 적용할 것을 제안한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.31-31
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• 2023

During December 2022, the northeast monsoon, which dominates the south and the Gulf of Thailand, had significant rainfall that impacted the lower southern region, causing flash floods, landslides, blustery winds, and the river exceeding its bank. The Golok River, located in Narathiwat, divides the border between Thailand and Malaysia was also affected by rainfall. In flood management, instruments for measuring precipitation and water level have become important for assessing and forecasting the trend of situations and areas of risk. However, such regions are international borders, so the installed measuring telemetry system cannot measure the rainfall and water level of the entire area. This study aims to predict 72 hours of water level and evaluate the situation as information to support the government in making water management decisions, publicizing them to relevant agencies, and warning citizens during crisis events. This research is applied to machine learning (ML) for water level prediction of the Golok River, Lan Tu Bridge area, Sungai Golok Subdistrict, Su-ngai Golok District, Narathiwat Province, which is one of the major monitored rivers. The eXtreme Gradient Boosting (XGBoost) algorithm, a tree-based ensemble machine learning algorithm, was exploited to predict hourly water levels through the R programming language. Model training and testing were carried out utilizing observed hourly rainfall from the STH010 station and hourly water level data from the X.119A station between 2020 and 2022 as main prediction inputs. Furthermore, this model applies hourly spatial rainfall forecasting data from Weather Research and Forecasting and Regional Ocean Model System models (WRF-ROMs) provided by Hydro-Informatics Institute (HII) as input, allowing the model to predict the hourly water level in the Golok River. The evaluation of the predicted performances using the statistical performance metrics, delivering an R-square of 0.96 can validate the results as robust forecasting outcomes. The result shows that the predicted water level at the X.119A telemetry station (Golok River) is in a steady decline, which relates to the input data of predicted 72-hour rainfall from WRF-ROMs having decreased. In short, the relationship between input and result can be used to evaluate flood situations. Here, the data is contributed to the Operational support to the Special Water Resources Management Operation Center in Southern Thailand for flood preparedness and response to make intelligent decisions on water management during crisis occurrences, as well as to be prepared and prevent loss and harm to citizens.

• Composites Research
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• 제20권4호
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• pp.31-41
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• 2007

시스템 요구 조건에 따른 다양한 돔 형상 설계를 위하여 외부 하중이 고려된 돔 형상 설계 식이 제시되었고, 동일 원통부와 보스 오프닝을 가지면서 다른 돔 형상을 갖는 압력 용기의 성능(파열압력*내부용적/복합재무게) 변화를 유한요소해석을 통하여 평가하였다. 해석 결과는 돔 형상이 낮아질수록 파열 압력이 저하되어 압력 용기 성능이 저하됨을 나타내었다. 특히 원통부 반경과 보스 오프닝간의 비를 나타내는 보스 오프닝 크기 비율(${\rho}\;o$)이 큰 경우는 돔 형상이 낮아짐에 따라 복합재 무게 증가율이 크게 나타남으로서 압력 용기 성능 저하의 원인이 되었고, 파열 압력 상승을 위하여 돔 부위에 추가적인 보강설계가 요구되었다. 예를 들어 ${\rho}\;o=0.35$ 이하의 돔인 경우, 돔 형상 변화가 크지 않음으로서 돔 형상 변화에 따른 압력 용기 성능 변화도 크지 않은 것으로 나타난 반면, ${\rho}\;o=0.54$ 이상의 압력 용기인 경우 낮은 돔으로 변화됨에 따라 파열 압력 감소와 복합재 무게 증가로 압력 용기 성능 저하가 비교적 크게 나타나서 압력 용기 내부 용적 증가나 스커트와 돔간의 공간 확보가 우선인 설계 조건을 제외하고는 낮은 돔 형상 설계가 바람직하지 않은 것으로 나타났다.