실측유량 자료를 활용한 홍수량 빈도해석 기법 평가

김태정,김장경,송재현,김진국,권현한,Kim, Tae-Jeong,Kim, Jang-Gyeong,Song, Jae-Hyun,Kim, Jin-Guk,Kwon, Hyun-Han 한국수자원학회 2022 한국수자원학회논문집 Vol.55 No.5

For water resource management, the design flood is calculated using the flood frequency analysis technique and the rainfall runoff model. The method by design flood frequency analysis calculates the stochastic design flood by directly analyzing the actual discharge data and is theoretically evaluated as the most accurate method. Actual discharge data frequency analysis of the measured flow was limited due to data limitations in the existing flood flow analysis. In this study, design flood frequency analysis was performed using the measured flow data stably secured through the water level-discharge relationship curve formula. For the frequency analysis of design flood, the parameters were calculated by applying the bayesian inference, and the uncertainty of flood volume by frequency was quantified. It was confirmed that the result of calculating the design flood was close to that calculated by the rainfall-runoff model by applying long-term rainfall data. It is judged that hydrological analysis can be done from various perspectives by using long-term actual flow data through hydrological survey.

Simple Pulmonary Eosinophilia Evaluated by Means of FDG PET: the Findings of 14 Cases

김태정,Kyung Won Lee,Hyae Young Kim,Joo-Hyuk Lee,Eun-A Kim,Seok Ki Kim,강건욱 대한영상의학회 2005 Korean Journal of Radiology Vol.6 No.4

Objective: We wanted to describe the findings of simple pulmonary eosinophilia with using 18 fluorodeoxyglucose (FDG) positron emission tomography (PET). Materials and Methods: We analysed the findings of 14 patients who underwent thoracic computed tomography (CT) and PET, and then they were subsequently proven to have simple pulmonary eosinophilia. PET studies were performed in four patients with malignancy to evaluate for cancer metastasis, and PET scans were also done in 10 healthy subjects who underwent volunteer cancer screening. The PET scans were evaluated by using the maximum standardized uptake values (SUVs). The subjects' CT findings also were reviewed and correlated with the PET findings. Results: A total of 42 nodules were detected on the CT scans. There were single nodules in three patients and multiple nodules in 11 patients (mean number of nodules: 3, range: 1 10, mean diameter: 9.5 mm 4.7). Twelve of 42 (28.6%) nodules showed FDG uptake and their mean maximum SUV was 2.5 1.6 (range: 0.6 5.3). Five of six solid nodules showed FDG uptake (2.2 1.1, range: 0.9 3.6), six of 11 semisolid nodules showed FDG uptake (3.1 1.8, range: 0.6- 5.3) and one of 25 pure ground-glass opacity nodule showed a maximum SUV of 0.8. The maximum SUVs of seven nodules in five patients were greater than 2.5. The maximum SUVs were significantly different according to the nodule types (p < 0.001). Conclusion: Simple pulmonary eosinophilia commonly causes an increase in FDG uptake. Therefore, correlation of the PET findings with the CT findings or the peripheral eosinophil counts can help physicians arrive at the correct diagnosis of simple pulmonary eosinophilia.

한국수자원조사기술원 전국유역조사 현장조사 현황 및 발전방안

김태정,이한용,김성훈,이성호,성장현,이연길,Kim, Tae-Jeong,Lee, Han-Yong,Kim, Seong-Hun,Lee, Seong-Ho,Seong, Jang-Hyeon,Lee, Yeon-Gil 한국수자원학회 2019 물과 미래(한국수자원학회지) Vol.52 No.10

위성정보 빅데이터 활용 국토종합관리 기술개발사업 소개

김태정,Taejung Kim 대한원격탐사학회 2023 大韓遠隔探査學會誌 Vol.39 No.5

A research project titled as Development of Comprehensive Land Management Technology using Satellite Image Information, funded by the Ministry of Land and Transportation, is being conducted to improve the efficiency of land management and to boost satellite image utilization in the private sector. This editorial describes the introduction of the project and papers presented in this special edition.

염 함침 무기막을 이용한 이산화탄소의 분리

김태정,정수환,이건홍 ( Tae Jung Kim,Soo Hwan Jeong,Kun Hong Lee ) 한국화학공학회 1995 화학공학의이론과응용 Vol.1 No.2

강우모의기법과 강우-유출 모형을 연계한 댐 유입량 자료 생성기법 개발

김태정,소병진,유민석,권현한,Kim, Tae-Jeong,So, Byung-Jin,Ryou, Min-Suk,Kwon, Hyun-Han 한국수자원학회 2016 한국수자원학회논문집 Vol.49 No.4

일반적으로 하천의 유량은 댐과 같은 수공구조물에 의해 조정된 유량으로 수자원계획을 위해서 필요한 자연유량과는 차이가 크다. 수자원계획을 수립함에 있어 자연 유입량 정보는 댐 운영과 수문분석을 위한 필수적인 정보이다. 본 연구에서는 댐 유역 일유입량 모의기법을 위한 통합 모형을 개발하였다. 첫째, 장기 강우-유출 모형의 입력강우자료로 사용하기 위하여 평균 및 중앙값과 같은 통계적 모멘트를 효과적으로 재현하고 극치 강우량 재현에 유리한 불연속 Kernel-Pareto 확률분포 기반의 강우모의기법을 통하여 강우모의를 수행하였다. 둘째, SAC-SMA 장기 강우-유출 모형의 매개변수를 Bayesian MCMC 기법을 통하여 최적화하여 산정된 매개변수의 사후분포를 활용하여 댐 유입량 시나리오 도출하였다. 댐 유역을 대상으로 개발된 모형을 평가한 결과 자연유량과 통계적으로 유사한 특성을 가지는 시나리오를 생성할 수 있었으며, 물수지 분석 등과 같은 수자원계획을 위한 시나리오로 활용이 가능할 것으로 판단된다. Generally, a natural river discharge is highly regulated by the hydraulic structures, and the regulated flow is substantially different from natural inflow characteristics for the use of water resources planning. The natural inflow data are necessarily required for hydrologic analysis and water resources planning. This study aimed to develop an integrated model for more reliable simulation of daily dam inflow. First, a piecewise Kernel-Pareto distribution was used for rainfall simulation model, which can more effectively reproduce the low order moments (e.g. mean and median) as well as the extremes. Second, a Bayesian Markov Chain Monte Carlo scheme was applied for the SAC-SMA rainfall-runoff model that is able to quantitatively assess uncertainties associated with model parameters. It was confirmed that the proposed modeling scheme is capable of reproducing the underlying statistical properties of discharge, and can be further used to provide a set of plausible scenarios for water budget analysis in water resources planning.

KOMPSAT-2 영상 PAN밴드의 내부표정 정확도 분석 및 개선방안 연구

김태정,정재훈,김덕인,Kim, Tae-Jung,Jeong, Jae-Hoon,Kim, Deok-In 대한원격탐사학회 2010 大韓遠隔探査學會誌 Vol.26 No.4

이 논문에서는 KOMPSAT-2 스테레오 영상의 PAN밴드에 존재하는 미세한 크기의 Y시차가 발생하는 원인을 규명하고 이를 개선하기 위한 일련의 실험 및 분석과정을 보고한다. 분석결과, Y시차가 발생하는 원인이 KOMPSAT-2 영상을 생성할 때 PAN밴드를 MS밴드와 일치하도록 Warping처리하는 과정에서 발생한 Resampling 오차 때문인 것으로 판단할 수 있었다. 또한 엄밀한 PAN밴드의 Warping 방식을 적용하여 Resampling 오차를 제거함으로써 Y 시차문제가 상당부분 개선될 수 있음을 확인하였다. 또한 KOMPSAT-2 영상 PAN밴드에서 관측된 밝기값 밀림현상도 엄밀한 Warping처리를 통해서 개선될 수 있음을 확인하였다. 따라서, 보다 엄밀한 Warping기법이 KOMPSAT-2 영상처리과정에 적용될 수 있다면 KOMPSAT-2 영상의 기하정확도 및 복사정확도가 많이 개선될 수 있을 것으로 기대한다. This paper reports experiments and analysis work done to find out the cause of Y parallex for stereo pairs of KOMPSAT-2 images and means to improve the Y parallex problem. We could conclude that the Y parallex problem was caused by resampling errors of KOMPSAT-2 PANchromatic bands, induced by the process of warping PANchromatic band with reference to multispectral bands. We could also conclude that a rigorous warping process could improve resampling of KOMPSAT-2 PANchromatic band and remove the Y parallex problem significantly. We also confirmed that a rigorous warping process could also remove blocky brightness patterns present on KOMPSAT-2 PANchromatic band. Therefore, by implementing more rigorous warping process within KOMPSAT-2 scene generation procedures, KOMPSAT-2 geometric and radiometric quality will be improved.

한국성인의 비타민무기질제 사용 실태조사를 통한 영양정보교육의 필요성연구

김태정,조정현,정경철,장현수,정주호,손의동,Kim, Tae-Jung,Cho, Jung-Hyun,Jung, Kyoun-Chul,Jang, Hyeon-Soo,Jung, Ju-Ho,Sohn, Uy-Dong 대한약학회 2008 약학회지 Vol.52 No.5

This study was conducted to investigate the actual conditions of vitamin supplement usage, the importance of their agents for health management, and the distribution of basic data for their correct consumption. For a period of one month 2003, the study was conducted based on questionnaires to the parents of students in both a middle school and a high school, and the personnel of K Company at random. The material used the survey sheets by setting up the previous investigation. The collected data analyzed the frequency and percentage of the following items: General demographic characteristics of consumers; the supplements taking; the reasons for taking them; the kinds of supplements taken; the media used for distributing data on their use; the potential use in the future, etc. According to the survey, the number of people who were taking supplements was higher than the number of people who weren’t taking them. Multi-vitamins were mostly consumed. The rate of supplements consume was high in people of a higher income bracket, had the time to exercise and to enjoy physical recreation. Most of the consumers who were taking the supplements said they did it to maintain their health and to recover from the fatigue. Those who weren’t taking them said they had enough vitamins from eating the appropriate food, and they were also concerned about the effectiveness of taking the supplements. The majority of useful information or advice for purchasing vitamins came from doctors, medical experts, relatives, and various media sources such as TV, newspapers, and magazines.

우리나라 내습태풍 유형에 따른 강우특성 및 종관기후학적 분석

김태정,박건철,권현한,Kim, Tae-Jeong,Park, Kun-Chul,Kwon, Hyun-Han 한국수자원학회 2015 한국수자원학회논문집 Vol.48 No.6

The recent unusual climate and extreme weather events have frequently given unexpected disaster and damages, facing difficulties in the management of water resources. In particular, climate change could result in intensified typhoons, and this would be the worst case scenario that can happen. The primary objective of this study is to identify the patterns of typhoon-induced precipitation and the associated synoptic pattern. This study focused on analyzing precipitation patterns over the South Korea using historic records as opposed to a specified season or duration, and further investigates the potential connection with heavy rainfall to synoptic patterns. In this study, we used the best track data provided by the Regional Specialized Meteorological Center of Japan for 40 years from 1973 to 2012. The patterns of the typhoon-induced precipitation were categorized into four groups according to a given typhoon track information, and then the associated synoptic climatology patterns were further investigated. The results demonstrate that the typhoon-induced precipitation patterns could be grouped and potentially simulated according to the identified synoptic patterns. Our future work will focus on developing a short-term forecasting model of typhoon-induced precipitation considering the identified climate patterns as inputs. 최근 빈번하게 발생하는 이상기후 현상은 수자원관리에 많은 어려움을 주고 있으며 예상치 못한 기상관련 재난피해를 야기하고 있다. 특히, 기후변화에 의해 점차 태풍의 세력이 강력해짐에 따라 태풍은 위험기상으로 인지된다. 본 연구의 주요목적은 태풍으로 인하여 발생하는 강우특성 및 종관기후학적 분석을 수행하는 것으로 일본 지역특별기상센터(Regional Specialized Meteorological Center Tokyo Typhoon Center, RSMC)에서 제공하는 1973년부터 2012년의 6시간 간격 최적경로(best track) 자료를 사용하여 우리나라에 상륙한 태풍사상만을 대상으로 태풍의 상륙 지속시간(내습시간)을 총 4개의 시간구간으로 구분하여 각 내습유형에 따른 강우특성 및 종관기후학적 분석을 수행하였다. 본 연구를 통한 결과는 태풍의 진로 및 이동속도를 예측 가능한 현 시점에서, 우리나라 태풍내습시 내습유형에 따른 홍수방어 및 사전대피와 같은 재해관리 측면에서 매우 유용한 정보를 제공할 것으로 사료된다. 향후 연구로서 본 연구를 통해서 확인된 기상학적 패턴을 활용하여 단기 태풍강수량 모의기법 개발이 필요할 것으로 판단된다.

Burkholderia sp. D5에 의한 phenanthrene과 pyrene 분해

김태정,조경숙,류희욱,Kim, Tae-Jeong,Jo, Gyeong-Suk,Ryu, Hui-Uk 한국미생물학회 2003 미생물학회지 Vol.39 No.4

Burkholderia sp. D5, a polyaromatic hydrocarbons(PAHs)-degrading bacterium, was isolated from oil-contaminated soil. The bacterium could utilize phenanthrene (Phe) as a sole carbon source but could not use pyrene (Pyr). However, the strain could degrade Pyr when a cosubstrate such as yeast extract (YE) was supplemented. The PAH degradation rate of the bacterium was enhanced by the addition of other organic materials such as YE, peptone and glucose. YE was a particularly effective additive in stimulating cell growth as well as PAH degradation. When 1 g-YE/L was supplemented into the basal salt medium (BSM) with 215 mg-Phe/L, the specific growth rate (0.28 h-1) and Phe-degrading rate (29.30 μmol/L/h) were enhanced approximately ten and two times more than those obtained in the BSM with 215 mg-Phe/L, respectively. Through kinetic analysis, the maximum specific growth rate (μmax) and PAH degrading rate (Vmax) for Phe were obtained as 0.34/h and 289 ${\mu}mol$/L/h, respectively. Also, μmax and Vmax for Pyr were 0.27 h-1 and 50 ${\mu}mol$/L/h, respectively. The degradation rates for each Phe (2.20 μmol/L/h) and Pyr (2.18 μmol/L/h) were lower in mixture substrates than in a single substrate (29.30 ${\mu}mol$/L/h and 9.58 ${\mu}mol$/L/h, respectively). Burkholderia sp. D5 can degrade Phe and Pyr contained in soil, and the PAH degradation rates in soil were 20.03 ${\mu}mol$/L/h for Phe and 1.09 ${\mu}mol$/L/h for Pyr. Polycyclic aromatic hydrocarbons(PAHs)를 분해하는 Burkholderia sp. D5를 유류 오염 토양으로 분리하였고, PAHs의 분해특성을 조사하였다. 분리균주는 유일 탄소원으로 phenanthrene(Phe)을 이용하여 생장이 가능하였고, pyrene (Pyr)을 유일 탄소원으로 이용하여 생장하지는 못하였으나 yeast extract(YE)를 공기질로 첨가해 준 조건에서는 Pyr를 분해할 수 있었다. 분리 균주의 PAH 분해속도는 YE, peptone 및 glucose의 첨가에 의해 향상되었으며, 특히 YE 첨가 효과가 가장 우수하였다. 무기염배지(BSM)에 215 mg-Phe/L와 1 g-YE/L를 첨가한 조건에서 Burkholderia sp. D5의 비생장속도(0.28/h)와 Phe 분해속도(29.30 ${\mu}mol$/L/h)는 YE를 첨가하지 않은 조건에서 얻은 비생장속도(0.02/h)와 Phe 분해속도(12.00 ${\mu}mol$/L/h)의 각각 10배 및 2배였다. Phe를 기질로 공급한 경우 최대 비생장속도(${\mu}$_max)와 최대 Phe분해속도(V_max)는 각각 0.34 h-1 및 89 ${\mu}mol$/L/h 이었고. Pyr을 기질로 공급한 경우 ${\mu}$_max와 V_max는 각각 0.27 h-1 및 50 ${\mu}mol$/L/h이었다. Phe 혹은 Pyr 단독 기질하에서 분해속도와 비교 하였을 때(29.30 ${\mu}mol$-Phe L/h, 9.58 ${\mu}mol$-Pyr L/h), 두 기질의 혼합조건에서 Phe와 Pyr 분해속도는 각각 2.20 및 2.18 ${\mu}mol$ L/ h로 저하되었다. Burkholderia sp. D5 균주는 토양에서 Phe와 Pyr을 분해할 수 있었는데, Phe와 Pyr 분해속도는 각각 20.03 및 1.09 ${\mu}mol$ L/h 이었다.