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이덕기,Lee, Deok-Gi 한국기술사회 2008 技術士 Vol.41 No.4
The different result and response of the earthquakes, occurred consecutively at China and Japan in May and June. respectively, is suggestive of the importance of preparedness against earthquake disaster. We learned lesson, although indirect, that the earthquake early warning. earthquake-resistant design, and people's concepts on earthquake can greatly reduce the earthquake hazards. The more preparedness we have in present, the less hazards we will experience for future.
구기자의 항우울효과 및 indoleamine에 미치는 영향
이덕기,곽동걸,박선동,Lee Duk-Ki,Gwak Dong-Gul,Park Sun-Dong 대한한의학방제학회 2003 大韓韓醫學方劑學會誌 Vol.11 No.2
Depression is very common mental disorder, so many people suffer from it, which makes the treatment of depression important. Many drugs to treat depression were developed and being prescripted. But they have a lot of side effects, so it needs to develop drugs without side effects or with less side effects. Herbal medicines have been used to treat not only physical disorder but also mental disorder and it has been reported that they have less side effects. Therefore, there is the need to discover and use herbal medicine with antidepressant effect. The purpose of this study was to reseach Antidepressant effect of Licium chinense Mill. and its influence on serotonin and its metabolite of depression model rats. We used 'forced swimming test(FST)' to know antidepressant effect of Licium chinense Mill. and HPLC to check the influence on serotonin and its metabolite(5-HIAA) of Licium chinense Mill. after rats' brains were divided into cerebral cortex, striatum, hypothalamus and hippocampus. The results were obtained as follows : In the study of antidepressant effect by 'forced swimming test(FST)' method, Licium chinense Mill. had a significant antidepressant effect. In the study of influence on serotonin and 5-HIAA by HPLC, Licium chinense Mill. mainly increased serotonin and 5-HlAA of cerebral cortex and striatum signigficantly among 4 parts of rat's brain above-mentioned. These results suggest that Licium chinense Mill. has antidepressant effect that may be related with the increase of serotonin and its metabolite as its mechanism, but more precise experiments will be need to prove their relation.
남한 중부지역의 지각특성 구명을 위한 토모그라피 역산에 의한 예비적 연구
이덕기,경재복,정태웅,Lee, Duk-Kee,Kyung, Jai-Bok,Chung, Tae-Woong 한국지구과학회 2001 한국지구과학회지 Vol.22 No.1
남한 중남부에 위치하는 한국교원대학교 단주기 지진 관측망에 1997${\sim}$1998년 사이 포착된 원거리 지진들의 종파 초동 시간의 상대적 도달시간차를 분석하고 향후 있을 한반도 전체규모의 종파속도구조대비의 연구를 위하여 예비적인 토모그라피(tomography) 역산을 실시하였다. 각 지진 관측점에서 측정된 종파의 상대적 도달시간차들은 최대 0.7초로 측정되었다. 경기육괴와 옥천대의 경계 근처의 관측점들에서 계산된 종파의 상대적 도달시간차들은 역방위각의 변화에 따라 비교적 큰 값의 변화를 나타내며 그 지역 지각 하부에 속도구조 이상체가 존재할 수 있음을 지시한다. 조사지역 상부 맨틀이 수평적으로 균질하다는 가정하에 지각 전체에 대한 토모그라피 역산 결과는 조사지역 북서쪽에 북동-남서 방향으로 상대적으로 낮은 종파 속도를 가지는 구조가 나타난다. 역산된 예비적 성격의 상대적 속도 구조이상체는 경기육괴와 옥천대의 경계를 따라 대비되는 듯한 경향을 나타낸다. 이번 연구에 사용된 블록의 크기나 위치 등에대한 입력 파라메터는 차후 자료가 충분히 집적될 경우 정밀분석을 위한 입력 파라메터로서 이용될 것이다. P wave traveltime delays has been measured and a preliminary tomouaphic inversion has been performed using the data collected from the network deployed by Korea National University of Education in the southcentral part Korea. The maximum variation in relative traveltime residuals is almost 0.7 seconds. A large azimuthal variation in traveltime residuals is observed at the stations in the northwestern part of the study area. This might indicate the existence of lateral velocity heterogeneity beneath the study area. Although, the inverted tomographic image seems to be correlated with the tectonic boundary between Kyunggi Massif and Okcheon Belt, the confidence level is presently low. We should place on the importance of this study for finding preferable inversion parameters and predicting probable result. Better tomographic image of the study area can be obtained in the near future when the data are accumulated.
이덕기(Lee, Deok-Ki),이의준(Lee, E. J.),최상진(Choi, Sang-Jin),박수억(Park, Soo-Uk),이상설(Lee, Sang-Sul) 한국신재생에너지학회 2005 신재생에너지 Vol.1 No.2
New & renewable energy technology development has been carrying out in 11 different areas so far. Many technologies are being applied to the required areas according to its own characteristics. Before launching the development, these technologies have been evaluated by their commercial effect and contribution to energy supply. In this paper, the impact factors enhancing the distribution of renewable energy were developed to select appropriate diffusion regulations for each technology area. In addition, AHP methodology was introduced to investigate priorities of the regulations along with weights of impact factors
충격기류식 여과집진장치의 운전조건 변화에 따른 적정 탈진주기 및 탈진압력 설정
이덕기 ( Deok-gi Lee ),임우택 ( Woo-taik Lim ),조재환 ( Jae-hwan Cho ),최금찬 ( Kum-chan Choi ),신현무 ( Hyun-moo Shin ),장성호 ( Seong-ho Jang ),서정민 ( Jeong-min Suh ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.6
In this study, using coke dust from ironwork, the pulse pressure on a pulse air jet bag filter was investigated considering the influence of the pressure loss due to filtration velocity and pressure intervals. The research on the optimal pulse pressure prediction of a pulse air jet type bag filter using coke dust showed the following results. Pressure loss volatility produced by the pulse pressure under low dust concentration(0.5, 1 g/m<sup>3</sup>) and low face velocity(1.25 m/min) was less than 10 mmH<sub>2</sub>O. This suggests that the pulse pressure has a low impact on the pressure loss. In contrast, pressure loss volatility under high dust concentration(3g/m<sup>3</sup>) and high face velocity(1.75 m/min) was 25 mmH<sub>2</sub>O. Therefore, pulse pressure with high dust concentration and high face velocity has a strong influence on the pressure loss volatility, compared to the condition of low dust concentration and low face velocity. The optimal pulse pressure of inlet dust concentration(0.5 g/m<sup>3</sup>) was 6 kg/cm<sup>2</sup> under the same face velocity(1.75 m/min). As concentration increased from 1 to 2 g/m<sup>3</sup>, the pulse pressure gradually reached 5 kg/cm<sup>2</sup> thus indicating that the pulse pressure(5 kg/cm<sup>2</sup>) is pertinent at a high concentration(3 g/m<sup>3</sup>) The pulse intervals: 20, 25 and 30 sec, which are relatively longer than 10 and 15 sec, corresponded to high pressure loss volatility produced by the pulse pressure. Furthermore, low pressure loss volatility was noted at 5 kg/cm<sup>2</sup> of the overall pulse pressure.
이덕기(Lee, Deokki),이의준(Lee, E. J.),최상진(Choi, Sangjin),박수억(Park, Soo-Uk) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Renewable energy technology development has been carrying out in 11 different areas so far. Many technologies are being applied to the required areas according to its own characteristics. Before launching the development, these technologies have been evaluated by their commercial effect and contribution to energy supply. In this paper, the impact factors enhancing the distribution of renewable energy were developed to select appropriate diffusion regulations for each technology area. In addition, AHP methodology was introduced to investigate priorities of the regulations along with weights of impact factors.
알코올 의존 환자에서의 한국어판 알코올의존 척도의 신뢰도와 타당도 연구
이덕기(Duk-Ki Lee):신진규(Jin-Kyu Shin):윤세민(Se-Min Yun),변원탄(Won-Tan Byun) 한국중독정신의학회 2000 중독정신의학 Vol.4 No.1
For the purpose of testing the utility of the Alcohol Dependence Scale (ADS) in Korea, the authors evaluated the reliability and validity of a Korean version of the ADS in 180 Korean alcoholic inpatients. The results were as follows: 1) The means of ADS was 16.94±8.23 and the scores of the ADS in 180 subjects conformed quite closely to a normal distribution. 2) The test-retest reliability for the ADS showed significant reliability. 3) The internal consistency analysis of the ADS showed significant reliability. 4) The item-analysis for each of the 25 items revealed a moderate correlation to the total score for the majority of the items. 5) In the correlation analysis for the test of concurrent validity, ADS scores had significant negative correlation with the age of first admission due to drinking and positive correlation with drinking amount and frequency, alcohol-induced sequelae and 6 secondary scales of AUI (such as drinking benefits, ob-ssessive drinking, direct complication, indirect complication, anxiety about drinking, insight). 6) The ANOVA analysis among 3 groups according to the severity of ADS scores revealed statistically significant differences in drinking frequency and alcoholinduced sequelae among the 3 groups and in drinking amount between mild group and moderate and severe groups. Based on these results, Korean version of the Alcohol Dependence Scale showed reasonable reliability and validity, and it may be useful in the evaluation of alcoholic patients.