발표 이주헌, 토론 김구군 - 경주지역 목관·목곽묘와 사로국

이주헌 한국상고사학회 2006 한국상고사학회 학술발표회 Vol.34 No.-

통일한국 청문회 : 문화 ; 미술 교류 역조현상의 실체

이주헌 평화문제연구소 1990 통일한국 Vol.81 No.-

도시와 대중, 문화가 만나는 방법

이주헌 사회평론 1992 길을찾는사람들 Vol.92 No.8

하천관리포럼의 소개 및 1회, 2회 포럼결과 보고

이주헌,조영대,이충성,Lee, Ju-Heon,Jo, Yeong-Dae,Lee, Chung-Seong 한국수자원학회 2014 물과 미래(한국수자원학회지) Vol.47 No.1

가뭄지수를 활용한 한반도 가뭄의 경향성, 주기성 및 발생빈도 분석

이주헌,서지원,김창주,Lee, Joo-Heon,Seo, Ji-Won,Kim, Chang-Joo 한국수자원학회 2012 한국수자원학회논문집 Vol.45 No.1

본 논문에서는 한반도에서 발생했던 과거 가뭄사상의 통계학적 특성을 분석하기 위하여 SPI (Standardized Precipitation Index)와 PDSI (Palmer Drought Severity Index)를 선정하였고, 기상청 산하의 59개 기상관측소의 1980~2009년까지의 기상자료를 수집하여 월평균 가뭄지수를 산정하였다. 산정된 가뭄지수를 이용하여 지수별 경향성 분석, 주기성 분석 및 가뭄기간(Drought Spell) 조사를 통하여 과거 한반도 가뭄의 통계학적 특성을 분석하였다. 한반도 가뭄의 유역별 경향성을 분석한 결과, SPI3와 SPI6는 봄과 겨울에는 모든 유역에서 가뭄이 심화되는 경향을 보였고 여름철에는 가뭄이 완화되는 경향을 보였으나, SPI12와 PDSI의 경우 짧은 지속기간의 가뭄지수와는 다소 다른 경향을 나타내었다. 한편, 유역별 가뭄의 주기성을 분석한 결과 1~2년 또는 6년 내외의 주기 성분이 유의한 것으로 나타났으며, SPI3의 분석결과 유역 전반에서 1~2년의 주기성을 보였고, SPI6와 SPI12는 유역별로 다소 차이를 보이기는 했으나 4~6년에서 강한 주기성을 나타냈다. 또한 PDSI도 마찬가지로 6년 내외의 주기성을 보였다. 가뭄기간 조사에서도 금강, 영산강, 낙동강 유역에 위치하는 관측소를 중심으로 극심한 가뭄이 많이 나타났던 것으로 분석되었으며, 한반도의 중부지방 보다 남부지방이 극심한 가뭄에 취약했던 것으로 나타났다. This study attempted to analyze statistical characteristics of historical drought of Korea through trend, periodicity and drought spell analysis by using the drought indices. Standard Precipitation Index (SPI) and Palmer Drought Severity Index (PDSI) were calculated using weather data of 59 weather stations under Korea Meteorological Administration (KMA). As a result of analysis, SP13 and SP16 showed trend of drier spring, drier winter and wetter summer in all basin of Korea. However, SPI12 and PDSI showed different trends with shorter duration drought indices. In case of wavelet transform analysis for drought periodicities, in a band of 1~2 years or below 6 years showed significant spectrum. SP13 showed strongest power spectrum near the band of 1~2 year variance, and SPI12 and PDSI showed 6 years periodicities. The results from drought spell showed that Nakdong River Basin, Geum River Basin and Youngsan River Basin were appeared as severe drought vulnerable area of Korea.

우리나라 과거 가뭄사상의 정량적 특성 분석 -5대강 유역의 가뭄빈도분석을 중심으로-

이주헌,장호원,김종석,김태웅,Lee, Joo-Heon,Jang, Ho-Won,Kim, Jong-Suk,Kim, Tae-Woong 한국수자원학회 2015 한국수자원학회논문집 Vol.48 No.12

This study aims to investigate droughts from the magnitude perspective based on the SPI (Standardized Precipitation Index) and the theory of runs applicable to quantitative analysis of drought in South Korea. In addition, the dry spell analysis was conducted on the drought history in the five major river basins of South Korea to obtain the magnitude, duration and severity of drought, and the quantitative evaluation has been made on historical droughts by estimating the return period using the SDF (Severity-Duration-Frequency) curve gained through drought frequency analysis. The analysis results showed that the return periods for droughts at the regional and major river basin scales were clearly identified. The return periods of severe drought that occurred around the major river basins in South Korea turn out to be mostly 30 to 50 years with the years of the worst drought in terms of severity being 1988 and 1994. In particular, South Korea experienced extremely severe droughts for two consecutive years during the period between 1994 and 1995. Drought in 2014 occurred in the Han River basin and was evaluated as the worst one in terms of severity and magnitude. 본 연구에서는 표준강수지수(SPI)를 이용하여 우리나라의 과거 가뭄사상을 규모적 관점에서 정량적 평가를 실시하였다. 이를 위하여, 5대강 권역에 대한 가뭄사상의 지속기간, 규모, 평균심도를 연속이론을 바탕으로 산정하였다. 또한 과거 가뭄사상의 재현기간을 추정하고 가뭄 평균심도-지속기간-빈도 곡선을 작성하기 위하여 가뭄빈도분석을 실시하였다. 분석결과, 우리나라에 발생했던 심한 가뭄의 재현기간은 대부분 30~50년으로 분석되었으며, 가뭄규모로 평가할 때 가장 가뭄이 심했던 해는 1988년과 1994년으로 나타났다. 특히, 1994년과 1995년에서는 2년 연속 가뭄이 발생하여 가장 극심했던 장기가뭄으로 분석되었다. 또한 2014년의 가뭄은 한강 권역을 중심으로 발생하였으며 가뭄의 규모와 평균심도 면에서 볼 때 우리나라 역사상 가장 극심했던 가뭄으로 평가되었다.

Immediate Anticoagulation for Acute Cardioembolic Stroke is Still Popular in Selective Cases in Korea

이주헌,Kwang-Yeol Park,허지회,Sun U. Kwon 대한뇌졸중학회 2011 Journal of stroke Vol.13 No.3

Background: Although current guidelines do not recommend immediate anticoagulation therapy (IAC) for acute ischemic stroke, judicious debates are still lingering on whether it might be done for acute cardioembolic stroke (ACES). We surveyed current practice patterns of anticoagulation therapy for ACES in Korea, and analyzed their related factors. Methods: Using a web-based system, all neurology staffs of training hospitals in Korea surveyed about when and how they commenced anticoagulation therapy in the hypothetical cases with ACES. Results: Of the 359 subjects invited, 281 responded to the e-mail, of whom 76 abstained from participating. The number of participants was therefore 205 (57.1%). Although a few physicians (4.4%) always performed IAC and some (10.7%) never did, most physicians made different decisions according to infarct size and presence of hemorrhagic transformation (HTr): IAC was performed more often in cases with medium-sized or small infarct than large one (68.2% vs. 35.9%, P <0.001), and in cases without HTr (68.6% vs. 34.9%, P <0.001). The most common method of administration was ‘heparin followed by warfarin’ (68.2%), and then ‘warfarin alone’ or ‘warfarin with aspirin’. If IAC was not commenced, it resumed most commonly between 1 and 2 weeks after the onset (44.0%). Conclusion: Quite many neurologists in Korea did IAC in selective ACES, e.g. small sized infarction without HTr. Further studies are needed to prove the effi cacy of IAC therapy in this selective population. (Korean J Stroke 2011;13:120-128)

간편법에 의한 소규모저수지의 수문학적 안전성 평가

이주헌,양승만,김성준,강부식,Lee, Joo-Heon,Yang, Seung-Man,Kim, Seong-Joon,Kang, Boo-Sik 한국농공학회 2011 한국농공학회논문집 Vol.53 No.2

Based on the statistical annual report, there are 17,649 reservoirs are operating for the purpose of agricultural water supply in Korea. 58 % of entire agricultural reservoirs had been constructed before 1948 which indicate the termination of required service life and rest of those reservoirs have also exposed to the dam break risk by extreme flood event caused by current ongoing climate change. To prevent damages from dam failure accident of these risky small size dams, it is necessary to evaluate and manage the structural and hydrological safety of the reservoirs. In this study, a simplified evaluation method for hydrologic safety of dam is suggested by using Rational and Creager formula. Hydrologic safety of small scale dams has evaluated by calculating flood discharge capacity of the spillway and compares the results with design frequency of each reservoir. Applicability and stability of suggested simplified method have examined and reviewd by comparing the results from rainfall-runoff modeling with dam break simulation using HEC-HMS. Application results of developed methodology for three sample reservoirs show that simplified assessment method tends to calculate greater inflow to the reservoirs then HEC-HMS model which lead lowered hydrologic safety of reservoirs. Based on the results of application, it is expected that the developed methodology can be adapted as useful tool for small scale reservoir's hydrologic safety evaluation.

Smoking is Not a Good Prognostic Factor following First-Ever Acute Ischemic Stroke

이주헌,이주영,안소현,장민욱,오미선,김철호,유경호,이병철 대한뇌졸중학회 2015 Journal of stroke Vol.17 No.2

Background and Purpose There is evidence that smoking increases stroke risk; however, the effect of smoking on functional outcome after stroke is unclear. The aim of this study was to explore the effect of smoking status on outcome following acute ischemic stroke. Methods We assessed 1,117 patients with first-ever acute cerebral infarction and no prestroke disability whose functional outcome was measured after three months. A poor outcome was defined as a modified Rankin Scale score of ≥2. Smoking within one month prior to admission was defined as current smoking. Our analysis included demographics, vascular risk factors, initial National Institutes of Health Stroke Scale (NIHSS) score, stroke subtype, onset-to-admission time, thrombolytic therapy, initial blood pressure, and prognostic blood parameters as covariates. Results At baseline, current smokers were predominantly male, approximately 10 years younger than non-smokers (mean age, 58.6 vs. 68.3 years), and less likely to have hypertension and atrial fibrillation (53.9% vs. 65.4% and 8.7% vs. 25.9%, respectively), with a lower mean NIHSS score (4.6 vs. 5.7). The univariate analyses revealed that current smokers had a better functional outcome and significantly fewer deaths at three months follow-up when compared with non-smokers (functional outcome: 64.0% vs. 58.4%, P=0.082; deaths: 3.0% vs. 8.4%, P=0.001); however, these effects disappeared after adjusting for covariates (P=0.168 and P=0.627, respectively). Conclusions In this study, smoking was not associated with a good functional outcome, which does not support the paradoxical benefit of smoking on functional outcome following acute ischemic stroke.

하천유량의 모의발생을 위한 추계학적 모형의 적용에 관한 연구

이주헌,Lee,Joo-Heon 한국방재학회 2001 한국방재학회논문집 Vol.1 No.2

실측자료가 충분하지 못한 단기간의 유출량 자료로부터 추계학적 모형에 의해 장기간의 자료를 모의발생시키는 목적은 수공구조물의 설계에 필요한 설계홍수량의 산정 및 수자원 시스템의 운영조작 방침을 결정하기 위한 풍부한 입력자료를 제공하는데 있다. 특히 본 연구에서는 단일지점이 아닌 다지점에 대한 지점간 서로의 연관성을 고려한 하천유량의 추계학적인 모의 발생기법인 다변량 자기회귀 모형을 적용하고자 한다. 따라서 본 연구에서는 낙동강유역의 2개 지점에 대하여 다변량 모형을 적용하여 모의 발생된 월유량과 실측치를 통계적으로 비교, 분석하였다. 모의발생된 월유량과 실측치를 평균, 분산, 왜곡도, 상관관계 등에 의해 비교, 분석한 결과 모의발생된 월유량과 실측치는 통계적으로 매우 유사하게 나타났다. The purpose of the synthetic generation of monthly river flows based on the short term observed data by means of stochastic models is to provide abundant input data to the water resources systems of which the system performance and operation policy are to be determined beforehand. In this study, a multivariate autoregressive model has been applied to generate monthly flows of the multi sites considering the correlations between each site. The model performance was examined using statistical comparisons between the historical and generated monthly series such as mean, variance, skewness and correlation coefficients. The results of this study showed that the modeled generated flows were statistically similar to the historical flows.