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지홍진 ( Hong Jin Chi ),이상은 ( Sang Eun Lee ),이재동 ( Jae Dong Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.4
This study was to investigate the runoff characteristics of non-point pollutants source at the urban area in Suwon city. The highest T-N and T-P concentration of rainfall runoff observed in agricultural area. In residential area, the highest BOD5 and SS concentration of rainfall runoff was investigated. During rainfall events, the peak concentrations of SS and BOD5 were observed after 1∼2 hours of rainfall in urban area. Whereas, the peak concentrations occurred within 1∼2 hours after rainfall and then the highest concentrations of SS and BOD5 sharply decreased, showing strong first flush effect in urban area. The EMC results indicated that the highest value of T-N and T-P in agricultural area was observed. While residential area was shown the lowest EMC value as T-N and T-P. Non-point pollutant loads on the land use types in urban area were investigated in the order of residential>industrial>agricultural>highway. BOD5 and SS loads on urban watershed were investigated in the order of Suwon>Hwangguji>Seoho>Wonchunri. Whereas, T-N and T-P loads on urban watershed were investigated in the order of Hwangguji>Suwon>Wonchunri>Seoho.
지홍진 ( Hong Jin Chi ),이상은 ( Sang Eun Lee ),최영근 ( Young Keun Choi ),이재동 ( Jae Dong Lee ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.6
This study was to investigate characteristics of Seoho watershed in Suwon city. BOD5 and SS were selected due to the one of the important factors of the water qualities. Monitoring was conducted monthly for four years during the non-rainfall time. Also, we have been monitored BOD5, CODMn, SS, TN and TP with two times sampling after the rainfalls. The highest concentrations of BOD5 and SS were observed in downstream compare with upstream and midstream during the non-rainfall time. No change was observed in BOD5 and CODMn during the non-rainfall time and after the rainfalls. The monitoring result indicated that the concentration of SS was the highest in downstream after the rainfalls. We have collected the samples two times after the rainfalls. The rainfall intensity in first sampling was two times higher than second sampling. TN and TP concentrations were increased with increasing the rainfall intensity at all stream. The ESB (Ecological Score of Benthic macroinverterbrate community) index was used to evaluate the statement of stream. ESB results were identified that the upstream is protected waters and the down and midstream is reformed waters. EBS analysis results indicated that the Seoho watershed was β-mesosaprobic at all stream.
연구논문 : 도시지역의 비점오염유출특성을 고려한 도시하천 적정관리방안
지홍진 ( Hong Jin Chi ),신귀암 ( Gwy Am Shin ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.1
The purpose of this study was to analyse the runoff characteristics of non-point pollution sources in an urban watershed and determine the effectiveness of newly installed riverwater treatment system to reduce water pollution caused by storm runoff in the urban watershed. The results of this study showed that the levels of BOD_{5} and suspended solid were highly influenced by first-flush effect and the pollutant load of those two parameters were also very high in the urban watershed. Meanwhile, the effectiveness of riverwater treatment system to reduce the levels of BOD_{5} and suspended solid was relatively high, but those to reduce the levels of T-N and T-P was low, which needs some additional unit treatment process such as filtration and coagulation. Nonetheless, the riverwater treatment system tested was relatively simple in installation and operation, effective in removing many water pollutants and, most importantly, does not require much space as other treatment systems, so it could be an attractive alternative option to reduce riverwater pollution caused by storm runoff in urban watersheds.
김지인,선우문경,손영호,이필휴,홍진용 대한파킨슨병및이상운동질환학회 2016 Journal Of Movement Disorders Vol.9 No.3
Objective To explore whether the Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) can be used to screen for dementia or mild cognitive impairment (MCI) in less educated patients with Parkinson’s disease (PD). Methods We reviewed the medical records of PD patients who had taken the Korean MMSE (K-MMSE), Korean MoCA (KMoCA), and comprehensive neuropsychological tests. Predictive values of the K-MMSE and K-MoCA for dementia or MCI were analyzed in groups divided by educational level. Results The discriminative powers of the K-MMSE and K-MoCA were excellent [area under the curve (AUC) 0.86–0.97] for detecting dementia but not for detecting MCI (AUC 0.64–0.85). The optimal screening cutoff values of both tests increased with educational level for dementia (K-MMSE < 15 for illiterate, < 20 for 0.5–3 years of education, < 23 for 4–6 years, < 25 for 7–9 years, and < 26 for 10 years or more; K-MoCA < 7 for illiterate, < 13 for 0.5–3 years, < 16 for 4–6 years, < 19 for 7–9 years, < 20 for 10 years or more) and MCI (K-MMSE < 19 for illiterate, < 26 for 0.5–3 years, < 27 for 4–6 years, < 28 for 7–9 years, and < 29 for 10 years or more; K-MoCA < 13 for illiterate, < 21 for 0.5–3 years, < 23 for 4–6 years, < 25 for 7–9 years, < 26 for 10 years or more). Conclusion Both MMSE and MoCA can be used to screen for dementia in patients with PD, regardless of educational level; however, neither test is sufficient to discriminate MCI from normal cognition without additional information.