• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.93-96
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• 2008

Considering the loss due to typhoon is increasing, estimation and analysis of a typhoon's influence has become more important. On this basis, the statistical models were presented in this paper by two principal elements. Comparisons between the estimated rainfall rate of these models and the observed value in the duration of Typhoon NARI(2007) were analyzed to confirm the availability of these models.

• Proceedings of the KIPE Conference
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• 2015.11a
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• pp.13-14
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• 2015

본 논문은 추정 정확도를 높이기 위해 비례적분 관측기를 이용한 실시간 잔존용량 추정 알고리즘을 제안한다. 시뮬레이션을 통해 제안하는 알고리즘의 타당성을 검증하였고, 초기 잔존 용량이 불명확하거나 배터리 모델 파라미터 값이 실제와 일치하지 않더라도 평균 추정오차는 0.3% 미만으로 확인되었다.

• Journal of Environmental Science International
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• v.25 no.8
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• pp.1165-1176
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• 2016

The accuracy of digital elevation models (DEMs) is crucial for properly estimating flood inundation area. DEM pixel size is especially important when generating flood inundation maps of small streams with a channel width of less than 50 m. In Korea, DEMs with large spatial resolutions of 30 m have been widely applied to generate flood inundation maps, even for small streams. Additionally, when making river master plans, field observations of stream cross-sections, as well as reference points in the middle of the river, have not previously been used to enhance the DEM. In this study, it was graphically demonstrated that high-resolution DEMs can increase the accuracy of flood inundation mapping, especially for small streams. Also, a methodology was proposed to modify the existing low-resolution DEMs by adding additional survey reference points, including river cross-sections, and interpolating them into a high spatial resolution DEM using the inverse distance weighting method. For verification purposes, the modified DEM was applied to Han stream on Jeju Island. The modified DEM showed much better accuracy when describing morphological features near the stream. Moreover, the flood inundation maps were formulated with the original 30 m pixel DEM and the modified 0.1 m pixel DEM using HEC-RAS modeling of the actual flood event of Typhoon Nari, and then compared with the flood history map of Nari. The results clearly indicated that the modified DEM generated a similar inundation area, but a very poor estimate of inundation area was derived from the original low-resolution DEM.

• Journal of the Korean Society of Marine Environment & Safety
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• v.13 no.4
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• pp.1-7
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• 2007

Using field observations, this study estimated the total weight and types of marine debris along the coast of Jinu Island in the Nakdong River Estuary after typhoons Usagi and Nari had passed. A numerical wave model was used to calculate the spatial wave height distribution at the time of the typhoons' passage. This study found that the total accumulation rate of marine debris deposited on the coast after the two typhoons had passed was about $5,769.86\;kg/km^2/day$ at this site, which was 14.42 times as high as that in normal weather. The wave height distribution in the sea off Jinu Island, based on numerical modeling, was $4.1{\sim}3.5\;m$, which was 1.0-2.5 times greater than for the case of other islands. Therefore, it is likely that the concentration of wave energy led to the deposition of marine debris.

• Ocean and Polar Research
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• v.31 no.4
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• pp.369-377
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• 2009

Performance of the Korea Ocean Research and Development Institute (KORDI) operational storm surge prediction system for the Korean coast is presented here. Results for storm surge hindcasts and forecasts calculations were analyzed. The KORDI storm surge system consists of two important components. The first component is atmospheric models, based on US Army Corps of Engineers (CE) wind model and the Weather Research and Forecasting (WRF) model, and the second components is the KORDI-storm surge model (KORDI-S). The atmospheric inputs are calculated by the CE wind model for typhoon period and by the WRF model for non-typhoon period. The KORDI-S calculates the storm surges using the atmospheric inputs and has 3-step nesting grids with the smallest horizontal resolution of ${\sim}$300 m. The system runs twice daily for a 72-hour storm surge prediction. It successfully reproduced storm surge signals around the Korean Peninsula for a selection of four major typhoons, which recorded the maximum storm surge heights ranging from 104 to 212 cm. The operational capability of this system was tested for forecasts of Typhoon Nari in 2007 and a low-pressure event on August 27, 2009. This system responded correctly to the given typhoon information for Typhoon Nari. In particular, for the low-pressure event the system warned of storm surge occurrence approximately 68 hours ahead.

• The Journal of Engineering Geology
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• v.18 no.3
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• pp.321-330
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• 2008

This study, geological survey was carried out in order to study on the geology, geological structure and volcanic activity of the Ulleung-do volcano body. Ulleung-do is the volcano body of about 3,000m heights from the East Sea seabed. The geology of Ulleung-do is divided into basaltic agglomerate, trachytic agglomerate, trachyte, trachytic pumice and trachyandesite in ascending orders. The faults in caldera of Nari Basin came to make the reverse triangle style in compliance with sinking. The faults in circumference of Nari Basin are ranging with northeast-southwest direction and northwest-southeast direction. The Quaternary volcanic activities in the Ulleung-do are divided into 5 activity period. The engineering geologists and the applied geologists were not easy to apply because complicated geology of Ulleung-do. Therefore, this study supplied simple geology of Ulleung-do for them.

• The Korean Journal of Mycology
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• v.43 no.1
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• pp.53-57
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• 2015

Ulleungdo is a volcanic island inhabited by a variety of animals and plants in an oceanic climate in the East Sea. The presence of filamentous fungi has been rarely reported in Ulleungdo. Thus, in this study some plants in the Nari basin and soils in the Dodong region were sampled. Fungi were isolated from the soil and identified by microscopical and molecular biological methods. Coniothyrium aleuritis, Hypocrea valdunensis, Pestalotiopsis uvicola and P. caudate were identified and found to be undescribed species in Korea.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.187-188
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• 2016

본 논문은 리튬이온 배터리 셀 등가모델을 기반으로 하여 동특성을 예측하기 위한 배터리 팩 등가회로 모델링을 제안한다. 셀 간 용량편차에 따른 셀의 직 병렬 구성방식과 배터리 팩 파라미터 분석을 통해 배터리 팩 모델링 방법을 제시한다. 모델링의 타당성은 시뮬레이션을 통해 검증한다.

• Journal of Life Science
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• v.12 no.1
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• pp.33-42
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• 2002

In several species, a short period of ischemic preconditioning protects the heart by reducing the size of infarcts resulting from subsequent prolonged bouts of ischemia. The mechanism by which activation of ATP-sensitive $K^+$($K_ATP$) channels could provide the memory associated with ischemic preconditioning is still under debate. Several signal transduction pathways have been implicated in the mechanisms of protection induced by ischemic preconditioning. The exact receptor-coupled pathways involved in preconditioning remain to be identified. Likely extracellular agonists are those whose circulating levels increase under conditions that activate $K_ATP$ channels; these conditions include ischemia and ischemic preconditioning. Potential physiological agonists include the following: (1) nitric oxide; (2) catecholamine; (3) adenosine; (4) acetylcholine; (5) bradykinin and (6) prostacycline. The purpose of this review was to understand the mechanism by which biological signal transduction mechanism acts as a link in one or more known receptor-mediated pathways to increase $K_ATP$ channel activity during ischemic preconditioning.

• Parasites, Hosts and Diseases
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• v.44 no.4 s.140
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• pp.271-283
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• 2006

The third-stage larvae (L3) of the parasitic nematode, Anisakis simplex, have been implicated in the induction of hyperimmune allergic reactions in orally infected humans. In this work, we have conducted a review of an investigation into immune reactions occurring in animals experimentally infected with A. simplex L3. The patterns of serum antibody productions if the experimental animals against excretory-secretory products (ESP) of A. simplex L3 contributed to our current knowledge regarding specific humoral immune reactions in humans. In our review, we were able to determine that L3 infection of experimental animals may constitute a good model system for further exploration of immune mechanisms and allergy in anisakiasis of humans.