Xylooligosaccharide 의 랫트에 대한 급성 경구독성

이지완,이창승,윤세왕,오화균,양창근,박윤재,이운택,류보경,강부현 한국식품위생안전성학회 1999 한국식품위생안전성학회지 Vol.14 No.3

The acute toxicity of xylooligosaccharide(XO) was evaluated in SD rats. Groups of 15 male and 15 female rats were orally administered XO (0, 5000 or 10000 ㎎/㎏). The changes of body weight and clinical signs were investigated for 14 days after treatments. No death and toxic effects were observed for 14 days. Soft stool and diarrhea appeared right after treatment for over dose and non-digestive feature of XO but these clinical signs disappeared on the next day. No significant changes in body weight and abnormal gross findings were observed in relation to XO. According to the results, XO has no special toxic effects and LD50 values of XO are above 10000 ㎎/㎏ in male and female rats.

SWAT을 이용한 낙동강유역의 보 개방에 따른 하천유량 및 수질 거동 분석

이지완,정충길,우소영,김성준 한국수자원학회 2019 한국수자원학회논문집 Vol.52 No.5

The purpose of this study is to evaluate the stream flow and water quality (SS, T-N, and T-P) behavior of Nakdong river basin (23,609.3 km2) by simulating the dam and weir operation scenarios using SWAT (Soil and Water Assessment Tool). The operation senarios are the simultaneous release for all dam and weirs (scenario 1), simultaneous release for all weirs (scenario 2), and sequential release for the weirs with one month interval from upstream weirs (scenario 3). Before evaluation, the SWAT was calibrated and validated using 11 years (2005-2015) daily multi-purpose dam inflow at 5 locations (ADD, IHD, HCD, MKD, and MYD), multi-function weir inflow at 7 locations (SHW, GMW, CGW, GJW, DSW, HCW, and HAW), and monthly water quality monitoring data at 6 locations (AD-4, SJ-2, EG, HC, MK-4, and MG). For the two dam inflow and dam storage, the Nash-Sutcliffe efficiency (NSE) was 0.56~0.79, and the coefficient of determination (R2) was 0.68~0.90. For water quality, the R2 of SS, T-N, and T-P was 0.64~0.79, 0.51~0.74, and 0.53~0.72 respectively. For the three scenarios of dam and weir release combination suggested by the ministry of environment, the scenario 1 and 3 operations were improved the stream water quality (for T-N and T-P) within the 3 months since the time of release, but it showed the negative effect for 3 months after compared to scenario 2. 본 연구의 목적은 낙동강유역(23,609.3 km2) 내 댐-보 연계운영 평가를 위해 SWAT (Soil and Water Assessment Tool)을 이용하여 댐보 운영 시나리오에 따른 하천 유량·수질 거동을 평가하는 것이다. 댐-보 방류시나리오는 댐-보 동시방류(시나리오 1), 보 동시방류(시나리오 2), 상류 보에서부터 1개월 간격의 순차방류(시나리오 3)로 모의되었다. 평가에 앞서 SWAT은 11년(2005-2015) 동안 5개의 다목적댐(안동댐, 임하댐, 합천댐, 남감댐, 밀양댐)과 7개의 다기능보(상주보, 구미보, 칠곡보, 강정보, 달성보, 합천보, 함안보) 및 6개의 수질관측지점(안동4, 상주2, 왜관, 합천, 남강, 물금)에 대하여 검보정 되었다. 유입량 및 저수량 검·보정결과 R2는 0.68~0.90, NSE는 0.56~0.79, RMSE는 0.94~1.74 mm/day 였으며, PBIAS는 –7.52~18.08%로 분석되었고,. 수질 R2는 SS는 0.64~0.79, T-N는 0.51~0.74, T-P는 0.53~0.72의 상관성을 나타었다. 댐-보 연계운영 평가를 위해 환경부에서 제시한 연계운영 시나리오 중 3개의 시나리오를 선택하여 모의하였으며, 시나리오에 따른 수문·수질 거동을 분석하였다. 분석결과 시나리오 2 에 비해 시나리오 1과 3은 연계운영 종료 이후 3개월 이전에는 수질 (T-N, T-P)개선 효과가 나타났지만, 3개월 이후로는 시나리오 2에 비해 수질이 나빠진 것으로 나타났다.

CCTV 영상 정보에서 도로위험 기상정보 추출을 위한 다중

이지완,정성훈,홍봉희 한국정보과학회 2017 한국정보과학회 학술발표논문집 Vol.2017 No.06

유역모델을 이용한 농업용수 신속회귀수량 산정 연구

이지완,정충길,김다예,맹승진,정현식,조영식,김성준,Lee, Jiwan,Jung, Chunggil,Kim, Daye,Maeng, Seungjin,Jeong, Hyunsik,Jo, Youngsik,Kim, Seongjoon 한국수자원학회 2022 한국수자원학회논문집 Vol.55 No.5

In this study, we tried to present a method for calculating the amount of regression using a watershed modeling method that can simulate the hydrological mechanism of water balance analysis and agricultural water based on watershed unit. Using the soil water assessment tool (SWAT), a watershed water balance analysis was conducted considering the simulation of paddy fields for the Manbongcheon Standard Basin (97.34 km²), which is a representative agricultural area of the Yeongsan river basin. Before evaluating return flow, the SWAT was calibrated and validated using the daily streamflow observation data at Naju streamflow gauge station (NJ). The coefficient of determination (R²), Nash-Sutcliffe Efficiency (NSE), Root-Mean-Square Error (RMSE) of NJ were 0.73, 0.70, 0.64 mm/day. Based on the calibration results for three years (2015-2017), the quick return flow and the return rate compared to the water supply amount for the irrigation period (April 1 to September 30) were calculated, and the average return flow rate was 53.4%. The proposed method of this study may be used as foundation data to optimal agricultural water supply plan for rational watershed management.

“아, 이 아이가 할 수 있구나.” 중도중복장애유아 어머니의 자녀 양육경험

이지완,박혜준 한국특수교육학회 2021 한국특수교육학회 학술대회 Vol.2021 No.-

수생태계 건강성 자료를 이용한 InVEST habitat quality 모델 적용성 평가

이지완,우소영,김용원,박종윤,김성준,Lee, Jiwan,Woo, Soyoung,Kim, Yongwon,Park, Jongyoon,Kim, Seongjoon 한국수자원학회 2021 한국수자원학회논문집 Vol.54 No.9

Ecosystem biodiversity is rapidly being lost due to changes in habitat, fragmentation of habitat, climate change, and land use changes by human activities. Recently, attempts have been made to approach the watershed management level to secure the health of the watershed, but studies on how to approach biodiversity and habitat management are still in lack. The purpose of this study is to evaluate the habitat quality of Geum river basin using Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) habitat quality model. The results of habitat quality was verified to eco-natural map and ecological watershed health evaluation results. The habitat quality of watershed was evaluated from 0 to 0.86 and the results showed that habitat quality was higher in upstream than downstream. Compared the habitat quality value in each eco-natural grade, the average habitat quality of 1st, 2nd and 3rd grades were 0.80, 0.76 and 0.71 respectively. The results of the correlation analysis with ecological watershed health data, the coefficient of determination (R²) was 0.58, and the person coefficient was 0.76. The results of this study may be used as foundation data to support habitat protection and implementation of long-term biodiversity-related policies.

도로 위험 기상 정보를 생성하기 위한 최적의 다중 ROI 선정 방법

이지완,김기진,전승우,홍봉희 한국정보과학회 2017 데이타베이스 연구 Vol.33 No.1

When CCTV installed at regular intervals on existing highway are used to generate real-time road hazard weather information, the driver can be provided with road situation information combined with current weather. In order to generate information such as rainfall and visibility distance from CCTV images, it is essential to analyze the data change pattern of time series images. In this paper, we propose a data analysis based weather information generation method that extracts graph patterns from one or more ROIs and generates numerical rainfall and visibility distance to generate image data patterns according to weather change. In addition, we describe a method for determining the optimal size of ROI and the interval between multiple ROIs that can optimally detect fine weather image changes due to the corrective distance and rainfall. As a result of experiments, we show the optimal ROI size and the spacing between ROIs. 기존 고속도로에 일정한 간격으로 설치된 CCTV를 사용하여 실시간 도로위험 기상 정보를 생성하면, 운전자에게 현재 기상과 결합된 도로 상황 정보를 제공할 수 있다. CCTV 영상으로부터 강우량과 시정거리 등의 정보를 생성하기 위해서 시계열 영상의 데이터변화 패턴 분석이 필수적이다. 본 논문에서는 기상 변화에 따른 영상 데이터 패턴을 생성하기 위해, 한 개 이상의 ROI에서 그래프 패턴을 추출하고, 그것으로부터 수치화된 강우량과 시정거리를 생성하는 데이터 분석 기반의 기상 정보 생성 방법을 제안한다. 그리고, 시정거리와 강우에 따른 미세한 기상 영상 변화를 최적으로 검출할 수 있는 ROI의 최적 크기 및 다중 ROI 간의 간격을 결정하는 방법에 대하여 설명하고, 실험 결과로서 최적의 ROI 크기 및 ROI 간의 간격을 보여준다.

금강유역 2014~2016년 기상학적 가뭄과 농업가뭄간의 상관성 평가

이지완,김경호,김세훈,우소영,김성준 한국습지학회 2019 한국습지학회지 Vol.21 No.5

The purpose of this study is to analyze the relationship between SPI (Standardized Precipitation Index) meteorological drought and RDI (Reservoir Drought Index) agricultural drought for Geum river basin. Drought Indices was calculated by collecting data of precipitation and agricultural reservoir water storage rate from 2014 to 2016. To evaluated the correlation between meteorological and agricultural drought, the Pearson correlation and the Receiver Operation Characteristic (ROC) analysis were conducted to evaluate the correlation between meteorological and agricultural droughts. The SPI-6 and RDI showed the highest relationship with Pearson coefficient 0.606 and ROC hit rates 0.722 respectively, and the spatial occurrence patterns of drought using overlapped SPI-6 and RDI, the big differences between the 2 indices were occurred in the upstream areas of Miho stream and Nonsan stream from August to October 2015. The analysis using reservoirs specifications for areas where reservoir droughts occurred was conducted, and the areas showing severe drought of RDI were the reservoir areas having relatively small value of basin magnifying power (BMP). This means that a reservoir has the reaction capability for agricultural drought mainly depending on the reservoir BMP. 본 논문의 목적은 금강유역을 대상으로 Standardized Precipitation Index (SPI) 기상학적 가뭄지수, 농업용 저수지 가뭄지수(Reservoir Drought Index, RDI)간의 관계를 통해 기상학적 가뭄이 농업에 미치는 상관성을 분석하는데 있다. 2014년부터2016년까지의 강수량, 농업용 저수율 자료를 수집하여 가뭄지수를 산정하였으며, 기상학적 가뭄과 농업가뭄간의 상관성을평가하기 위해 Pearson 상관계수와 Receiver Operation Characteristic (ROC) 분석을 실시하였다. 상관분석결과 SPI-6와RDI의 Pearson 및 ROC 적중룰이 각각 0.606, 0.722으로 가장 높게 분석되었고 가뭄의 공간적 발생패턴을 분석하기 위해공간분포된 SPI-6와 RDI를 중첩한 결과 2015년 8월부터 2015년 10월의 심한 가뭄 발생 시 미호천 상류 유역과 논산천 유역에서 중복적으로 가뭄의 심도의 차이가 발생하는 것을 확인하였다. 저수지 가뭄이 발생한 지역에 대한 저수지의 제원을 이용하여 분석을 수행한 결과, RDI 가뭄이 크게 나타난 지역은 유역배율이 작은 저수지들이 많이 모여 있는 지역일수록 극심한 가뭄을 겪는 것으로 분석되어, 유역배율에 따라 저수지의 농업가뭄 대응능력에 차이가 있음을 확인하였다.

Xylooligosaccharide 의 랫트에 대한 아급성경구독성

이지완,이창승,윤세왕,양창근,이운택,류보경,강부현,박윤제 한국식품위생안전성학회 2000 한국식품위생안전성학회지 Vol.15 No.2

The subacute toxicity of xylooligosaccharide (XO) was evaluated in SD rats. Groups of 60 male and 60 female rats were orally administered with 0, 333, 1000 or 3000 mg/kg of XO for 13 weeks. The changes of body weight, food and water consumption were investigated for 17 weeks, while heamatological values and histopathological findings were investigated at the end of the 13 weeks and 17 weeks including 4 weeks of recovery periods. No death and toxic effects were observed during the test periods. There were statistically significant changes in several parameters, but these change had no direct relationship to dosage. Clinical changes were general occurrence and no specific toxicity was related to XO. Gross necropsy and histopathology revealed that no target organs were found in the treated mouse with XO. According to the results, no-observed effect level of XO is estimated to be above 3000 mg/kg.

나치 독일과 소련이 일으킨 ‘거대한 전환’의 물결 - Stefan J. Link, Forging Global Fordism: Nazi Germany, Soviet Russia, and the Contest over the Industrial Order (Princeton, NJ: Princeton University Press, 2020), pp. x+316, 오선실 옮김, 『글로벌 포드주의

이지완 한국서양사연구회 2023 서양사연구 Vol.- No.69