주관적 각성도의 日週期 리듬이 교통사고 발생에 미치는 영향

유범희,조두영,정도언 大韓睡眠-精神生理學會 1994 수면·정신생리 Vol.1 No.1

복숭아 雙子果에 關한 연구

유영산,김도균 대구효성가톨릭대학교 1997 연구논문집 Vol.56 No.2

최근 油桃系 복숭아에서 발생하고 있는 雙子果의 類型과 재배품종, 樹齡, 결과지 종류, 기상, 생장조절제처리 등에 따른 발생정도를 조사하여 다음의 결과를 얻었다. 1. 복숭아 雙子果는 암술이 두개 착생된 雙子房花가 결실된 것으로서 受精 여부에 따라 'doubled fruit'형과 'spurred fruit'형으로 구분되었다. 2. 雙子果는 털이없는 油桃系 품종에 주로 발생되었으며 발생이 많은 품종은 'Armking', 'May Grand'and 'Chunhong'등 早生種 品種에서 였다. 3. 雙子果의 발생은 花芽分化期인 7~8월의 고온 건조시 그 이듬해에 많이 발생되었다. 4. 雙子果의 발생은 수세가 강한 유목, 세력이 강한 樹冠上部의 從長枝, 직사광선을 받기쉬운 樹冠의 동향 및 남향에서 발생이 많았다. 5. GA₃처리는 쌍자과의 발생을 억제시켰으나 꽃눈이 탈립되는 부작용을 보였으며 반면에 paclobutrazol 처리는 쌍자과의 발생을 증가시키는 경향을 보였다. 6. 雙子果의 발생은 7~8월의 지나친 高溫乾燥시 증가하므로 적절한 灌水가 발생을 줄일 수 있는 방법이라 생각되었다. This experiment was conducted to investigate the cause of occurrence and types of peculiar doubed fruits which occured recently in peach orchards. And it was also concucted to investigate the occurrence degree of doubled fruits as influenced by peach cultivar, tree age, fruiting branch, weather, and application of growth regulators. The results obtained in this experiment are summarized as follows. 1. The doubled fruits were developed from malformed flowers with two pistils. Doubling of fruits was divided into two types: 'doubled fruit' from fertilization of two pistils and 'spurred fruit' from fertilization of only one pistil. 2. The doubled fruits were seldom occured in the tomentose peach cultivars and mainly occured in the nectarine cultivars. The doubled fruits were often occured in early maturing cultivars such as 'Armking', 'May Grand'and 'Chunhong'. 3. The occurrence of doubled fruits increased in the vigorous young tree, water sprout of the upper canopy and eastern and southern part of tree canopy. 4. When the period of flower bud differentiation was high temperature and low humidity, The occurrence of doubled fruits was increased in the next year. 5. Treatment of GA₃reduced the occurrence of doubled fruits, treatment of paclobutrazol apparently increased the doubled fruits in 'May Grand' nectarine. 6. The occurence of doubled fruits was assumed to be due to a previous hot-dry season during the flower bud differentiation period, Thus, it was speculated that a frequency of doubled fruits may be reduced by irrigation.

가스상 오존을 이용한 디젤오염토양 원위치 산화처리

유도윤 漢陽大學校 環境科學硏究所 2003 環境科學論文集 Vol.24 No.-

탄화수소화합물로 구성된 유류물질이 토양내로 누출될 경우 하부 지반내의 지하수에 중요한 오염원으로 작용하게 되며, 토양 생태계에도 심각한 위해 영향을 끼칠 수 있다. 가솔린과 함께 가장 많은 양이 소비되고 있는 디젤유는 휘발유 특성으로 인하여 기존의 공기추출공법으로는 적절히 처리되지 않으므로 다양한 대안 기술들이 개발되고 있다. 본 연구는 가스상 오존을 토양내로 직접 주입하여 오존의 강력한 산화력에 의해 디젤오염물질을 제거할 수 있는 신공정을 개발하기 위한 목적으로 수행되었으며, 이를 위하여 가스상 오존이 토양내로 주입될 경우 통야 내에서의 오존 거동, 토양 매체 자체에 의한 소모 특성, 그리고 오존산화에 의한 디젤오염토양 처리 특성을 칼럼 실험을 통하여 분석하였다. 오존산화에 의한 디젤오염토양 처리 특성을 평가하기 위해 오존지속주입시간을 각기 달리한 회분식 실험을 수행하였다. 디젤유로 오염시킨 현장토양내로 오존가스를 연속 주입하였을 때(오존농도 119mg/L, 오존주입유량 50mL/min) 14시간 반응 후 평균 디젤제거율은 94%였다. 오존산화에 의한 디젤의 분해반응은 1차 반응모델에 의해 적절히 표현될 수 있었으며, 반응속도상수(k)값은 0.213hr^-1으로 3.26 시간의 반감기를 갖는 것으로 나타났다. 동일한 조건에서 오존가스 대신 공기를 주입하였을 때 14시간 동안 30% 이내의 제거율을 나타냄에 따라 디젤오염토양에 대한 기존의 공기추출식 처리공정의 적용한계를 확인하였다. 본 연구결과를 통해 오존사화공정은 디젤과 같이 낮은 휘발성을 가진 물질에 의해 오염된 토양을 효과적으로 복원할 수 있을 것으로 평가되었다. Soils accidentally contaminated by petroleum hydrocarbons spills could be a source for future groundwater contamination and also bring adverse impacts to ecosystem in soils. Since diesel fuel, widely used with gasoline, could not be removed effectively by means of a conventional vapor extraction technology due to its low volatility, various types of remediation alternatives for diesel-contaminated soils have been developed. This paper includes the basic experimental results performed for developing an innovative and technologically feasible process wherein gaseous ozone, a powerful oxidant, was injected directly into vadose zone by which in-situ chemical degradation of semi- or, non-volatile petroleum product such as diesel fuel was derived. Treatment efficiencies of diesel-contaminated soil by ozonation were evaluated using batch-type experiments in terms of cumulative ozone input time variation. When ozone was continuously introduced at a flow rate of 50mL/min with a concentration of 119±6 mg/L to soils spiked by diesel with a concentration of 1,485 mg-DRO/kg-soil, the average diesel removal efficiency of ozone inlet and outlet point samples was 94% after 14hrs of operation. The first order kinetic model fits well to the degradation of diesel by ozone oxidation with a reaction rate constant of 0.213 hr-1. On the other hand, soil vapor extraction system showed less than 30% of removal rates of residual diesel both at the inlet and outlet samples under the same experimental conditions which confirms the limited treatability of SVE in diesel contaminated soil. The results of experiments in this study demonstrated that the ozone oxidation process would be one of the most promising treatment alternatives for soils contaminated by fuels having lower volatility such as diesel.

靑少年 健全育成을 위한 韓國 家庭社會化의 問題點과 그 解決 方案

유도진 경희대학교 사회과학대학 1998 社會 科學 論叢 Vol.16 No.-

경련성질환 소아 및 청소년의 행동 및 정서장애에 대한 연구

정도언,김유광 국립서울정신병원 1985 臨床硏究論文集 Vol.1985 No.-

정신지체아동의 감각운동에 대한 문헌적 연구

김도호,황영성,박재성,한성유,허정석,이수판 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose or this study is to consider the effect of the sensory exercise which has been judged as improving mentally retarded children's motor ability, social maturity, recognition ability, emotional behavior through stimulation of sensory organs. Result are as follows: 1. (First) Sensory exercise was promoting motor ability of the mentally retarded children. 2. (Second) Sensory exercise was promoting social maturity of the mentally retarded children. 3. (Third) Sensory exercise was promoting recognition ability of the mentally retarded children. 4. (Finally) Sensory exercise was promoting emotional behavior or the mentally retarded children.

스쿼시 참가자의 참여동기와 만족도 관한 문화기술적 분석

김도호,한성유,허정석 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

This study attempts to investgate the aspects on the motives and the satsfactions of the participants of squash. This study is to analyze by ethnographic research method. The subjects in this study were 6 selected adult who were attending. The Data were collected through interviews during a period from october 2004 to december, 2004. The findings of this study were as below: First, In participating motives, casual squash participants showed participation continuous on account of health physical strength, activity motive, and accomplishment motive. Second, In participating motives, serious squash participants showed participation continuous on account of immersion motive, ostentation motive, activity motive. Third, In life satisfaction, casual squash participants felt satisfaction in physical part, psychological part. Fourth, In life satisfaction, serious squash participants felt satisfaction in physical part, social part.

광양만의 저질 중금속 농도 분포 특성

김도희,유한홍,정종성,조현서,신현출 木浦海洋大學校 2002 論文集 Vol.10 No.1

The main goals of the study were to investigate the sediment quality and trace metal distribution in sediment of Kwangyang Bay, south coastal of Korea. Surface sediment sampling were performed in November, 2000 and February and March, 2001. The concentration of H₂S, IL and COD in sediment were measured by a manual of the Department of Marine Environment of Korea. The extracted trace metals Fe, Cu, Cd, Pb, and Zn in sediments mean analyzed by the flame atomic absorption spectrophotometer with an instrument of model Shimadzu AA-6701F. H₂S, IL and COD in the surface sediment were 1.3 mg/g, 5.9 % and 15.0 mg/g, respectively. The mean content of Fe, Cu, Cd, Pb and Zn were 1523 mg/kg, 4.799 mg/kg, 1.321 mg/kg 9.285 mg/kg and 9.353 mg/kg, respectively. All of these measured trace metals level were over the other reported trace metal level in sediment of coastal area. According to histograms, the content of H₂S, IL and COD and trace metals in sediment of this study were affected by artificial activities rather than natural process.

폴리에틸렌의 전화정도에 따른 열분해 특성 변화

정도성,김상채,선우창신,유의연 全南大學校 觸媒硏究所 2003 觸媒硏究 論文集 Vol.24 No.-

Thermogravimetric analysis and pyrolysis experiment were used as studying the effent of conversional level on the thermal degradation of HDPE. The wide conversional range in this work encompassed a change in the degradation mechanism. To accommodate this mechanism change, the data were treated as a pseudo first-order reaction. It was observed that the data conformed to a first-order fit at conversional range of 0.05∼0.98 with an activation energy of 376 kJ/mol. The lower activation energy occurring at lower conversion (0.01∼0.05) is attributed to scission of 'weak links' in macromolecles. The higher activation energy was similar to the carbon-carbon bond dissociation energy and is associated with random scission throughout backbone chain. The lower the conversional level, the more abundant the paraffinic hydrocarbon in product. To what extent this finding are influenced by limitation of terminate reaction of radicals.

열분해반응을 통한 폴리에틸렌-폴리프로필렌 혼합물의 오일회수 특성

정도성,김상채,유의연 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-

The thermal degradation of polyethylene, polypropylene alone an their mixture into oil and gas products has been carried out at different reaction conditions. The effect of various parameters such as temperatures, space velocity, mixing ratio on the yield and composition of the oil recovery for these polymers at different reaction temperature. In polyethylene-polypropylene mixtures, the more polypropylene is added, the more rate of degradation of PE and conversion of PE/PP mixture increase at a lower temperature than that of PE alone. It is proposed that this enhancement is due to the free radical from polypropylene, in which can form free radical from polyethylene a lower temperature.