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ARCS 전략을 적용한 과학수업이 초등학생의 학습동기와 학업성취도에 미치는 영향 - 5학년 전기회로 꾸미기 단원을 중심으로 -
이형철,오정임,Lee, Hyeong-Cheol,Oh, Jung, Im 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.5
The purpose of this study was to investigate the effects of science teaching using ARCS strategies on elementary pupils' teaming motivation and academic achievement. For this purpose, 67 children of 2 classes in the 5th grade of an elementary school were involved, and each class was assigned to experimental and comparison group. The experimental group, consisting of 33 children, were applied with the teaching method using ARCS strategies, while the comparison group, 34 children, were applied with traditional-type teaching method. The instruction effects were analyzed through pre/post-test's results using the questionnaires of loaming motivation and academic achievement. The results of this study are summarized as follows. After science lessons, it was found that the teaching method using ARCS strategies was more effective in improving learners' motives of teaming science and academic achievements than traditional instructions. And the instruction using ARCS strategies was effective to the children who were in low and middle level in academic achievement compared to those in high level.
수계 중 폴리브롬화 디페닐에테르 모니터링을 위한 Passive Sampling 적용 및 그랩 시료채취법의 대체 활용가능성 평가
김언정(Un Jung Kim),서창동(Chang Dong Seo),임태효(Tae Hyo Im),오정은(Jeong Eun Oh) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.1
폴리브롬화 디페닐에테르는 강한 소수성과 큰 분자량을 지닌 물질로 수체에 쉽게 용존되지 않으며, 이로 인해 다른 환경매체에 비해 수환경에 대한 연구는 많지 않다. 그러나 하·폐수처리장으로부터 수환경으로의 질량부하, 침적토에서의 재부유 현상 그리고 부유 입자 및 콜로이드로부터의 분배현상은 무시할 수 없는 영향을 미칠 것이다. 따라서 수환경 중 폴리브롬화디페닐에테르를 조사하는 것은 중요하면서도 어려운 작업이다. 최근에 수환경에서 소수성물질을 모니터링 할 때의 어려움을 극복하기 위한 방안으로 반투과성막장비와 같은 수동적 시료채취 기법이 사용되고 있다. 수동적 시료채취를 사용하면 시료채취 기간 동안 주변환경인자의 변동을 조절하며 미량으로 존재하는 폴리브롬화 디페닐에테르를 검출하고 장기간에 거쳐 재현성 있는 모니터링 결과를 얻을 수 있다. 따라서 본 연구에서는 반투과성막장비(SPMD)를 수질 모니터링 장비로서 활용하는 가능성을 확인하고자 하였다. 강둑에서 그랩, 혼합 시료채취법과 SPMD를 적용하여 다양한 수질시료 채취기법에 따른 시간적 변동과 농도 차이를 확인하고 SPMD를 사용하여 폴리브롬화 디페닐에테르의 수환경 중 농도를 예측할 수 있는지 평가하였다. PBDEs (polybrominated diphenyl ehters) are rarely dissolved in water due to their strong hydrophobicity and large molecular mass so not many researches were done in aqueous environment compared to other environmental compartments. However, the mass loading from wastewater treatment plant into aquatic environment, re-suspension from bottom sediment and partitioning from floating particles and colloids may not be negligible. It is, therefore, important but also difficult to investigate PBDEs in water environment. Recent overcoming resolution towards this barrier to monitor hydrophobic organic compounds in aquatic environment is using passive sampling technique like semipermeable membrane device. By using passive sampling, it might be possible to obtain long-term reproducible monitoring result and detect the trace amounts of PBDEs, with controlling fluctuation of surrounding environmental factors during the sampling event. So therefore, this study is purposed to confirm the possibility of using SPMD (semi-permeable membrane device) as water monitoring tool. Grab samples, composite samples and SPMDs were applied in river bank to evaluate the concentration difference and temporal fluctuation by various water sampling method, and to assess the water concentration prediction capability of SPMD for the PBDEs.
임재석(Jae Seok Im),김나래(Na Rae Kim),오정은(Jung Eun Oh),홍성호(Sung Ho Hong),조주연(Choo Yon Cho),조용진(Yong Jin Cho),유병욱(Byung Wook Yoo),신경숙(Kyung Suk Shin),조현(Hyun Joe),신황식(Hwang Sik Shin),손두용(Doo Yong Son) 대한임상노인의학회 2018 대한임상노인의학회지 Vol.19 No.1
Background: Several studies suggest that smoking is a risk factor of metabolic syndrome. The objective of this study is to evaluate the association between smoking status and metabolic syndrome among Korean adults. Methods: We assessed 4349 participants aged 19 years and older from the Korean National Health and Nutritional Examination Survey 2013. Smoking statuses were collected from self-reported questionnaires. Subjects were divided into three categories: non-smokers, former smokers, and current smokers. The diagnosis of metabolic syndrome was made using criteria modified NCEP-ATP III. Logistic regression analysis was used to calculate odds ratios between smoking status and metabolic syndrome. Results: The overall prevalence of metabolic syndrome was 27.8% and former smokers had the highest prevalence of metabolic syndrome at 30.7%. After adjustment for age, sex, alcohol consumption, physical activity and body mass index, the odds ratio for high density lipoprotein cholesterol disorder, triglyceride disorder, abdominal obesity in current smokers was 1.25 (95% CI, 1.02~1.54), 1.83 (95% CI, 1.48~2.26), and 1.35 (95% CI, 1.00~1.81) compared with non-smokers, respectively. For metabolic syndrome, the odds ratio in current smokers was 1.30 (95% CI, 1.02~1.68) compared with non-smokers. Conclusion: Current smokers showed increased risk for metabolic syndrome. Smoking status was associated with increased risk of metabolic syndrome in Korean adults.
낙동강 중권역 대표지점 및 공단 배출수에서의 준휘발성유기화합물 (페놀류 및 농약류) 분포특성 및 계절적 변동 평가
정희진 ( Hee Jin Jeong ),김언정 ( Un Jung Kim ),임태효 ( Tae Hyo Im ),임영경 ( Young Kyong Lim ),오정은 ( Jeong Eun Oh ) 한국환경분석학회 2013 환경분석과 독성보건 Vol.16 No.4
To assess the levels and distribution patterns of semi-volatile organic pollutants comprising 6 phenols, 3 organochlorine pesticides (OCPs), 6 organophosphorus pesticides (OPPs) and 4 other pesticides (diuron, furfural, hexazinone, linuron), we analyzed river water samples collected from Nakdong river basin and effluent samples from five industrial wastewater treatment plants (IWTP). The concentration levels of 6 phenols, 3 OCPs, 6 OPPs and 4 other pesticides in the river waters ranged from not detected (ND)~450 ng/L, ND~25.8 ng/L, ND~19.2 ng/L and ND~20.7 ng/L, respectively and the levels of those target compounds in effluent were from ND~353 ng/L, ND~4.42 ng/L, ND~12.8 ng/L and ND~10.1 ng/L, respectively. Among 19 target compounds, four compounds (4-nitrophenol, 2-methyl-4,6-dinitrophenol, demeton-O, diuron) showed statistically significant seasonal variations (p<0.001). Phenols were predominant in all samples and showed increasing tendency from upstream to downstream. Though no clear emission sources were identified due to the large variances of sources between sampling points but some relevant occurrence pattern was observed between IWTP effluent and surrounding areas, suggesting potential effect of IWTP on the close regional river basin.