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유기성폐기물과 밭토양에 대한 붉은줄지렁이와 밭지렁이의 섭식 전후의 분변토 발생량 및 오염물질의 함량 변화
나영은 ( Young Eun Na ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.2
BACKGROUND: Earthworms are essential detritus feeders that play a vital role in the process of decomposition of organic matter and soil metabolism. The complex process of partial breakdown of organic matter and mixing with mucous and gut microbial flora in the form of earthworm cast results in the reduction of the toxicity. This study focused on the change of cast amount and pollutant contents before and after the eating of the organic waste and upland soil with the two species of earthworm. METHODS AND RESULTS: The two species of earthworms were compared to the cast production. In the upland soil material, the daily amount of worm’s cast was 1.42 g in E. andrei and 0.40 g in A. agrestis. In the organic waste material, the cast of E. andrei was 0.78~0.83 g and the cast of A. agrestis. have not been collected because all earthworms died after the treatment. The heavy metals treated in the upland soil were evaluated the impact of the worm excretion. With the E. andrei, the cast production was decreased 0.1~0.8 times in zinc, 0.2~0.5 times in copper, and 0.1~0.7 times in cadmium compared to the control treatment according to the levels of concentration. With A. agrestis, the cast amount was decreased 0.3~1.1 times in zinc, 0.2~0.3 times in copper, and 0.1~2.1 times in cadmium, respectively. The changes of pollutant contents before and after the eating of the organic wastes with E. andrei were studied. In the treatment of the Alcohol Fermentation Processing Sludge and the Fruit Juice Processing Sludge, heavy metal content of the cast was increased 0.7~53.3% compared to the sludge materials. PAHs contents were decreased 50.1% in the cast of the Alcohol Fermentation Processing Sludge and 36.6% in the cast of the Fruit Juice Processing Sludge, respectively. CONCLUSION: In conclusion, although the A. agrestis was bigger than E. andrei in size and weight, the cast amount of A. agrestis was small. The two species of earthworm was less excretion with high concentration of heavy metals. While the heavy metals such as zinc, copper, and cadmium were considerably accumulated in the cast, the total compounds, PAHs were fairly decomposed. There results would provide us for restoring contaminated soil and cleaning organic wastes.
공간패널모형을 이용한 KTX 개통이 지역소비에 미친 영향 분석
나영,김용구,Na, Young,Kim, Yongku 한국데이터정보과학회 2016 한국데이터정보과학회지 Vol.27 No.5
고속철도 (KTX) 개통으로 인해 전국이 반나절 생활권으로 편입되면서 지역의 사회, 경제, 문화 등 여러 분야에 다양한 영향을 미친 것으로 알려져 있다. 최근 KTX 개통 후 정차도시와 그 주변지역에 대한 여러 가지 변화가 관측되어 지면서 그 영향에 대한 여러 가지 연구가 이루어져 왔는데, 지역의 생산 및 고용 확대, 운송 수단간 수요 대체효과, 기업의 지방이전 및 수도권 기능의 분산을 통한 국토의 균형 개발, 그리고 고속철도 이용에 따른 시간비용 절감을 통한 여러가지 사회 경제적 비용 축소 등에 영향을 준 것으로 알려져 있다. 또한 최근에는 KTX역 중심의 관광 네트워크를 통한 지역 관광 여가 산업의 발전과 지역 문화 예술 인적 교류 활성화를 통한 삶의 질 향상에 관한 연구도 활발하다. 본 연구에서는 지역별 가계최종소비지출에 대한 공간패널모형을 이용하여 KTX 개통을 통한 고속철도망 연결이 지역경제의 소비활동에 어떠한 영향을 미쳤는지를 알아보고자 한다. 이를 위해 독립변수로는 지역별 임금소득, 주택매매가격지수, 그리고 실질금리 등을 사용되었고, KTX에 의해서 연결되어 있는지 유무에 따라 공간 자기상관 행렬을 고려하였다. Impact of Korea train express (KTX) on the regional economy in Korea has been studied by many researchers. Current research is limited in the lack of quantitative research using a statistical model to study the effect of KTX on regional economy. This paper analyses the influence of KTX to the household final consumption expenditure, which is one of important regional economic index, using spatial panel regression model. The spatial structure is introduced through spatial autocorrelation matrix using adjacency of KTX connection. The result shows a significant effect of Korea train express on the regional economy.
경험담 분석을 통한 쓰기 태도 형성 파악 : 정서 요소를 중심으로
나영은(Na Young-eun) 국어교육학회 2011 국어교육연구 Vol.48 No.-
The purpose of this study is to describe the favor and disfavor experience that forms the attitude. For this study, I analyzed the stories of 150 learners' writing experience in first grade of middle school by using the qualitative research methods and verified the experiences that effected on the writing attitude separated by the before and after of school age period. For the writing learning in the before of school age, the attitudes toward teaching and reinforcement of educator, literacy environment and birth order in the family and others effected on the writing attitude of learner. For the writing learning in the after of school age, the dissatisfaction for the forced writing represented to the diary writing, social reinforcement and others effected on the writing attitude of learner. I should prepare the teaching method that can reinforce the favor affect and relief the disfavor affect.
나영,이성백,Na, Young,Lee, Seong-Baeg 한국지하수토양환경학회 2001 지하수토양환경 Vol.5 No.3
새만금 간척으로 인해 변화된 조류흐름이 갯벌의 조성에 미치는 영향을 조사하였으며, 이에 따른 물리적 특성이 중금속의 오염도에 미치는 영향을 분석하였다. 또한 회분실험을 통하여 중금속의 종류와 농도 변화에 따른 흡착특성을 알아보고, 흡착등온식을 적용시켰다. 분석결과에 따르면, 해류의 흐름변화로 강 하구 부분에 퇴적현상이 일어나고 있었으며, 이 현상은 중금속의 함량에 영향을 미치고 있었다. 특히 입도 분포와 유기물 함량 그리고 양이온 치환능력의 영향이 크게 작용하고 있음을 알 수 있었다. 중금속 흡착능력은 30분 이내에 주입농도의 90%이상이 흡착되는 것으로 나타났다. 그러므로 새만금의 흐름 양상은 토양 입도를 변화시킬 것이며, 역시 중금속의 흡착능력의 변화가 일어날 것이다. The study was performed to examine the influence of sea tide on a tideland composition by Saemankeum reclamation and to evaluate a correlation between the characteristics of physical and the pollution level of heavy metals. Also, it was investigated the characteristics of heavy metal adsorption through a batch experiment and applied to adsorption isotherm equations. In the results, the flow of sea tide occurred to accumulation action and had an effect on the content of heavy metals. It suggests that influence factors for the content of heavy metals in the tidal flat be grain size, cation exchange capacity and organic matter content. Adsorption capacity of heavy metals occurs to 90% adsorption rate for injection concentration within 30 minutes. The flow patterns in Saemankeum area will undergo a change for soil size distribution. In result, this soil size changed will effect the adsorption capacity of heavy metals.