야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

신경조직망의 배경 및 응용

이원돈 충남대학교 자연과학연구소 1988 忠南科學硏究誌 Vol.15 No.2

Various models in neural networks are introduced in this paper, with their advantages including parallelism, completion, fault tolerance, cooperative information processing, and optimization.

저금리시대의 생명보험산업

이원돈 한국보험학회 2003 保險學會誌 Vol.65 No.-

1997년 말 금융위기 직후 폭등하였던 시장금리는 하향안정세를 거쳐 현재의 저금리 상황으로 이어졌다. 선진 외국의 예처럼 저금리 상황은 계속 지속될 것이며 반등의 경우에도 과거의 두 자리 수 금리시대는 없을 것이라는 것이 중론이다. 약속한 이율(예정이율)을 기준으로 보험료를 받아 장기적으로 운용해야 하는 생명보험회사로서는 시장금리의 변동이 경영에 미치는 영향이 지대하다고 볼 수 있다. 특히 고금리보다는 저금리 상황의 지속이 생명보험회사의 경영에 치명적이다. 본고에서는 현재의 저금리 상황에서 지속적인 이자율차손을 보고 있는 우리나라 생명보험회사의 현황과 그 원인을 분석하고, 같은 상황을 겪은 미국과 현재 겪고 있는 일본의 생명보험업계가 어떻게 대응하였고 어떻게 대응하고 있는가를 살펴보고, 우리의 대응방안을 생명보험업계 차원과 제도적인 차원에서 제시하고자 한다. Low market interest rates have been stabilized since the rates sharply rose right after the 1997 Financial Crisis. The trend of low market interest rates is expected to continue like the cases of developed countries. Volatility of market interest rates heavily affects the profitability of life insurers who have long term liabilities with fixed(assumed) interest rates during the period of insurance. Especially, a low interest rate trend become more critical to life insurers than a high trend. This study analyses the current status of Korean life insurers who have experienced heavy losses from negative spreads under the recent trend of low market interest rates, examines the same cases of U.S.A. and Japan, and finally proposes possible ways to cope with the situation from the standpoints of life insurers and supervising authority.

四元數射影空間의 實超曲面의 特性

이재돈,손원호 대구대학교 부설 과학교육연구소 1991 과학교육 Vol.4 No.-

방사성 동위체 도입과 그 추적기술에 의한 수도계(水稻系) 활성상의 해명과 개선에 관한 연구(제3보) : 저인산성 무기 용성물질의 시용과 용수조절 효과에 대하여 Effects of Application of Fused Magnesium Low Level Phosphate and Control of Irrigation Water

이춘영,안학수,정희돈,김규원,노준정 한국농화학회 1973 Applied Biological Chemistry (Appl Biol Chem) Vol.16 No.1

1. Through out the entire stage of growth, the amount of nutrients, number of tillers and of spikes increased in the Simagcalin treated plot as compared with the control. The treated plot showed healthul growth at the later growing stage. On the other hand. management of irrigation water resulted in raised the grain straw ratio and retarded the culm height about 10%. 2. Application of Simagcalin greatly increased the content of phosphorus and magnesium at the harvesting time. The culm and sheath analyses are recommendable for the determination of magnesium deficiency. 3. The controled irrigation would effect root activity as the main factor, and Simagcalin might act as a secondary factor. 4. While the application of phosphorus may not affect the yield components, The basic elements in Simagcalin may enhance the uptake ov nutrients under heavy application of nitrogn.

저금리와 생명보험산업

이원돈 대구대학교 경제경영연구소 2003 경제경영연구 Vol.1 No.3

1997년 말 IMF 외환위기 직후 폭등하였던 시장금리는 하향안정세를 거쳐 현재의 저금리 상황으로 이어졌다. 선진 외국의 예처럼 저금리 상황은 계속 지속될 것이며 반등의 경우에도 과거의 두 자리 수 금리시대는 없을 것이라는 것이 중론이다. 약속한 이율(예정이율)을 기준으로 보험료를 받아 장기적으로 운용해야 하는 생명보험회사로서는 시장금리의 변동이 경영에 미치는 영향이 지대하다고 볼 수 있다. 특히 고금리보다는 저금리 상황의 지속이 생명보험회사의 경영에 치명적이다. 본고에서는 현재의 저금리 상황에서 지속적인 이차손을 보고 있는 우리나라 생명보험회사의 현황과 그 원인을 분석하고, 같은 상황을 겪은 미국과 현재 겪고 있는 일본의 생명보험업계가 어떻게 대응하였고 어떻게 대응하고 있는가를 살펴보고, 우리의 대응방안을 생명보험업계 차원과 제도적인 차원에서 제시하고자 한다.

신경회로망 최적화 기법의 배경 및 응용

이원돈,이석훈 충남대학교 자연과학연구소 1988 忠南科學硏究誌 Vol.15 No.2

Simulated annealing, a neural network optimization technique, is introduced with its applications as well as its theoretical background. Applications include a combinatorial problem on shipbuilding design, and a continuous problem on optimal design in linear regression model.

용접공들의 면역능에 관한 연구

이수일,조봉수,김영욱,고광욱,조원근,김영실,강수용,황인경,조병만,김돈균 大韓産業醫學會 1997 대한직업환경의학회지 Vol.9 No.1

The authors examined human immunity indicators such as CD4, CD8, Natural Killer(NK) cell, IgG, IgA, and IgM, and heavy metals such as Pb, Cr, Cd to evaluate the health hazard of welders. We selected total 126 male subjects, 60 welders who had more than 5 year working history as an exposure group, and 66 office workers and medical college students as a control group. This immunity evaluation approach is the first newly designed study that has never been tried in past studies on welder's heath evaluation. And the results were as follows. 1. Total lymphocyte count of peripheral blood was significantly higher in welder group, 2,615±650 ea/㎕ compared with 2,368±681 ea/㎕ in control group(p>0.05). 2. The proportion of CD4, CD8, NK cell in welder group was 37.5±9.4%, 24.0±8.8%, and 21.0±9.5%, respectively, and 35.5±6.5%, 25.0±6.9%, and 19.6±8.8% in control group. CD4 and NK cell were slightly higher, and CD8 was slightly lower in welder group. but there was no statistical significance between two groups(p≥0.05). 3. IgG, IgA, and IgM in welder group were 15.9㎎/㎗, 2.7㎎/㎗ and 1.5㎎/㎗, respectively, and 15.6㎎/㎗, 2.9㎎/㎗ and 1.7㎎/㎗ in control group. There was no statistical significance between two groups(p≥0.05). 4. Blood lead, cadmium and chromium concentrations were 4.2±1.8㎍/㎗, 0.4±0.38㎍/㎗, 1.2±0.6㎍/㎗ in welder group and 3.2±1.7㎍/㎗, 0.44±0.29㎍/㎗, 1.1±0.6㎍/㎗ in control group, respectively, and these value were within normal ranges.

카드뮴 첨가된 α형 산화철에 의한 일산화탄소의 촉매산화 반응연구

이성한,김용록,김돈,정원양,김규홍,최재시 연세대학교 자연과학연구소 1983 學術論文集 Vol.11 No.-

α형 산화철에 카드뮴을 4mol%, 8mol% 및 12mol%로 각각 첨가시켜 외성영역의 특성을 갖는 산화물들을 제조하였다. 이 산화물들을 촉매로한 일산화탄소의 산화반응 속도론적 연구를 통하여 본산화물의 결함구조, CO 산화반응에 대한 촉매성 및 불순물 첨가효과등을 조사하였다. 또한 450℃에서 O_2 및 CO를 여러압력으로 도입시켜 Cd-doped α-Fe_2O_3의 전기전도도를 측정하고 이를 반응속도론적 데이타와 결부시켜 본산화물상에서 CO 의 산화반응 메카니즘과 율속단계를 제안하였다. 반응온도범위 350~460℃에서 산출된 활성화에너지는 10.1~11.3kcal.mol^-1이었다. CO_2흡착에 의한 CO산화반응의 억제효과는 본실험의 반응온도 영역인 350~460℃에서는 나타나지 않았으며 CO 산화반응의 전반응속도 차수는 1.5차로서 일산화탄소에 대해서는 1차, 산소에 대해서는 0.5차임이 밝혀졌다. 반응속도론적 데이타와 전기전도도 데이타에 의해 본촉매의 활성은 카드뮴도프로 인해 생성된 산소공위(Vo"-2e^-)에 기인한 것이었다. 카드뮴의 첨가량이 증가할수록 반응속도는 증가하였으나 12mol% 이상의 카드뮴이 첨가된 산화철상에서는 반응속도가 크게 증가하지 않는 것으로 나타났다. CO와 O_2는 근본적으로 화학흡착하며 CO의 흡착자리는 격자산소(O^-2_(latt))와 기흡착원산소 (O^-_(ads)), 그리고 O_2의 흡착자리는 산소공위(Vo"-2e^-)로 밝혀졌다. The α-Ferric oxide containing 4, 8, and 12mol% with cadmium were prepared. The oxidation rates of carbon monoxide in the presence of these oxide systems were measured to investigate the defect structure, the catalytic activity for the oxidation of carbon monoxide, and the impurity effect. The conductivity was also measured at 450℃ under the various pressures of oxygen and carbon monoxide. From the agreement between the kinetic and conductivity data, the oxidation mechanism of carbon monoxide and the rate determining step on this oxide catalyst were suggested. In the temperature range from 350 to 460℃, the calculated activation energy for the CO oxidation over Cd-doped α-Fe_2O_3 systems were 10.1∼11.3kcal·mol^-1. The inhibition by an adsorbed CO_2 during the CO oxidation was not observed in the above temperature range. The overall reaction order for the CO oxidation is 1.5; the first order with respect to CO and the one-half order with respect to O_2. The catalytic activity of this oxide system is due to oxygen vacancies induced by Cd-doping. The oxidation rates increase with increasing the amount of dopant and above 12mol%, however, don't highly increased. CO and O_2 are essentially chemisorbed as ions and the adsorption sites for CO are the lattice oxygens (O^2-_(latt)) and prechemisorbed oxygens (O^-_(ads)), the adsorption site for O_2 is the oxygen vacancies (Vo¨-2e^-).

관광변수의 계절변동 분석 : 국립공원탐방객을 중심으로

원융희,이돈재 龍仁大學校 1997 용인대학교 논문집 Vol.14 No.-

The purpose of this study is to analyze seasonalities with regard to 18 National Parks. To effectively analyze the seasonalities, national parks were divided into six groups: Jungbu, Chungcheng, Seonam, Dongnam, Mts and Shores. Analysis of Variance tables, Arima Model and Log Difference were used to analyze the seasonalities of national park. The paper is intended to examine the difference between mean and variance of visitors and investigate the stages which are converging or enlarging between inter-season and intra-season in each cases. To verifiy the study, we converted original data into seasonal dummy variables and deseasonally adjusted data to eliminate the secular trend, cyclical variation and irregular variation. This analysis results in several categories. The stationary stage was not shown in most of the national parks. As to the seasonality between inter-season and intra-season, it was difficult to fond the stylized facts uniformed characters converging or enlarging trends. The fluctuation of variation was also not found in the parks near metroplitans. It means that the parks without accessibility and demand threshhold show high variance of visitors between seasons. The least interval variation in the log difference was found in Jungbu Group including Seolak, Gaeyong, and Bukhan. But the most interval variation due to the high demand in summer was revealed in the Shores Group including Dadohae, Taean, and Hanryo. Each Mts. group has its own distinctive features. For example, in case of Naejang, the most variation was shown due to the highest demand in fall. Finally, the seasonal variance of visitors are still considerably exist across the national parks, but this difference is closer to the mean as time goes.