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學校周邊 道路交通 騷音과 學生 聽感反應과의 相關關係 硏究
김종수,최동훈,박진식,김석택,김장호,서정민 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2
For my thesis I have analyzed the differences between the traffic noise level surrounding the schools and the perceived level of noise. I have used the ways of measurement and questionnaires to support my study. According to the analysis, the measured noise level was higher than the expected noise level. The equivalent noise level was proven to be higher when the windows of the classrooms were open. The noise level was also higher on the third floor than the first floor. The correlation between the measured noise level and the perceived level of noise was tested in each school. The school which had a higher expected noise level showed a high perceived level of noise. The measured noise level and the perceived level of noise became larger on the higher floors. Through the questionnaires, the traffic noises were proven to be the largest noise-making source surrounding the schools. Most of the students replied on the questionnaires that they have been consistently bothered by the noise. It interfered with their studies and concentration. Also, the sound of their voices became louder because of the noise around their schools. Therefore, I have come to the conclusion that the traffic noises that surround the schools give the students negative influences.
Mokpo-MS를 利用한 F_1用種子 採種方法과 採種能力
權炳善,文溶植,李鍾一 조선대학교 농업연구소 1982 農業硏究 Vol.1982 No.1
成分改良된 Mokpo-MS를 利用하여 F_l用種子 採種方法과 採種能力을 究明코자 實驗한바 MS와 花粉親間 의 交互栽植時에 10a 當 F_l採種量은 어느 組合에서나 다 같이 MS 1 畦, 花粉親 1畦 交互畦栽植에서118~127kg의 F_l採種量을 얻었고 MS 2 畦, 花粉親 1 畦 交互畦 栽植에서는 101~ 118Kg, MS 3 畦, 花粉親 1 畦 交互畦 栽植에서는 86~89Kg의 F_l採種量을 얻었다. The F_1 seed production in per l0a has been produced by 118kg to 120kg with the one row planting of pollen parents and one row alternate planting of Mokpo-MS. The other hand, two rows planting of Mokpo-MS and one row alternate planting of pollen parents has been to produced by 101kg to 118kg and three rows planting of Mokpo-MS and one row alter nate planting of pollen parents has been produced by 86 to kg in F-l seed production.
주성분분석에 의한 거금수도의 수질환경 및 식물플랑크톤 변동 요인 해석
윤양호,박종식 한국환경과학회 2000 한국환경과학회지 Vol.9 No.1
A study on the variational characteristics of water quality and phytoplankton biomass by principal component analysis(PCA) was carried out in Kogum-sudo from February to October in 1993. We analyzed PCA on biological factors such as chlorophyll α and phytoplankton cell numbers for centric and pennate diatoms, phytoflagellates, and total phytoplankton as well as physico-chemical factors as water temperature, salinity, transparency, dissolved oxygen(DO), saturation of DO, apparent oxygen utilization(AOU), chemical oxygen demand(COD), nutrient (ammonia, nitrite, nitrate, phosphate and silicate), N/P ratio and suspended solid(SS). The source of nutrients supply depended on the mineralization of organic matters and inputs of seawater from outside rather than runoff of freshwater. The phytoplankton biomass was changed within short interval period by nutrients change. And it was controlled by the combination of several environmental factors, especially of light intensity, ammonia and phosphate. The marine environmental characteristics were determined by the mineralization of organic matters in winter, by runoff of freshwater including high nutrients concentration in spring, by ammonia uptake and high phytoplankton productivity in summer, and phosphate supplied input seawater from outside of Kogum -sudo in autumn. And Kogum-sudo was separated with 2 regions by score distributions of PCA. That is to say, one region was middle parts of straits which was characterized by the mixing seawater and the accumulated organic matters, other one region was Pungnam Bay and the water around Kogum Island which was done by high phytoplankyon biomass and productivity year-round.
김은호,박진식,안종수,김정권,성낙창,장성호 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1
This study was to understand leaching characteristics with pH controlling agents and Temp. control, and investigate leaching characteristics with pH control from opening a leaching test to an end for reassessing leaching test of heavy metals with enviromental conditions in landfill. The results were as followed ; 1. Because leaching of heavy metals was increased in low pH, pH must control for leaching in existing leaching test. 2. Generally, regulation time(6hr) of leaching was confirmed reasonablely, except for Cu in plating sludge. 3. In pH controlling solution, there was nearly not difference between Acetic acid and HCl, and if considering Cu, the former was appropriate. 4. In a part of heavy metal, leaching rate was increased in high Temp, and normal Temp, in existing leaching test would be revaluated.
김은호,박진식,김정권,안종수,성낙창,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1
In this study, we can be obtained the following conclusions about the present environmental conditons and the post management of the expired landfill. 1. The component ration in paper, vinyl·plastic and leather·rubber of combustible amounts to much more than others. In the future, decompositions will be delayed considerably, due to these. 2. Except heavy metals in leachate, each of analysis value change considerably, but are equal to the component of general leachate. 3. The soils of lower part in landfill do not differ greatly from surrouding soils. soil pollutions with heavy metals in general domestic waste proved to be concerned greatly. 4. All of landfill facilites are poor in enviromental, and the post management is rearly controlled, so the proper countmeasure preparation is urgent.