http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
마산만 표층퇴적물에서 미량금속의 화학적 존재형태 및 생태계 위해도 평가
선철인,이영주,안정현,이용우,Sun, Chul-In,Lee, Young-Ju,An, Jung-Hyun,Lee, Yong-Woo 한국해양학회 2014 바다 Vol.19 No.2
마산만 표층퇴적물에서 미량금속의 오염도 및 잠재적 생태계 위해도를 평가하기 위하여 미량금속(Cu, Pb, Zn, Cd, Ni)의 총 농도 및 화학적 존재형태를 분석하였다. 미량금속의 농도는 Ni을 제외한 모든 금속이 만의 내측에 위치한 마산항 주변에서 높게 나타났다. 미량금속의 화학적 존재형태 중 Cd과 Pb은 비잔류 부분이 각각 92%, 88%로 인위적 기원에 의해서 주로 공급되는 것으로 나타난 반면, Ni은 잔류 부분이 70%로 주로 자연적 기원에 의해서 공급된 것으로 나타났다. 미량금속의 오염도 및 생태계 위해도를 다양한 지수로 평가한 결과, pollution load index (PLI)는 만의 바깥쪽 정점을 제외한 모든 정점에서 1을 초과하여 인위적 오염 상태를 보였다. Ecological risk index (ERI)는 만의 내측에서 considerable 또는 moderate risk 수준이었으며, 만의 바깥쪽에서는 low risk 수준이었다. Cd의 ecological index (Ei) 값은 대부분의 정점에서 높게 나타났으며, Cd이 산가용성 부분에서 가장 높은 농도를 보여 Cd이 마산만에서 저서생물에게 잠재적으로 높은 위해도를 미칠 것으로 판단된다. Total concentration and chemical speciation of trace metals (Cu, Pb, Zn, Cd, and Ni) were determined to evaluate pollution level and potential ecological risk in surface sediments of the Masan Bay. The results showed that the trace metal concentrations, except for Ni, were high in the inner Masan Bay. Based on the chemical speciation of metals in sediments, the percentage of total concentrations of Cd and Pb in non-residual fraction was 92% and 88%, respectively, indicating that these metals originated mainly from anthropogenic sources. However, Ni (70%) was dominant in residual fraction. Pollution load index (PLI) and ecological risk index (ERI) values in the inner bay indicate the presence of anthropogenic pollution and considerable-moderate ecological risk, respectively. Ecological index (Ei) value for Cd was high at most stations in the Masan Bay, and Cd content was the highest in acid soluble fraction, which presents the highest ecological risk. The results obtained in this study indicate that Cd presents a high potential ecological risk to benthic biota in the Masan Bay.
선철인,박건우,박현실,박준건,김성길,최만식,SUN, CHUL-IN,PARK, GEON-WOO,PARK, HYEON-SIL,PARK, JUN KUN,KIM, SEONG GIL,CHOI, MAN SIK 한국해양학회 2018 바다 Vol.23 No.4
황해 동부해역 표층퇴적물의 중금속 분포 특성을 파악하기 위하여 입도, 유기탄소(TOC)와 함께 중금속 원소들(Cu, Pb, Zn, Cd, Cr, Mn, As, Ni, Co, Li, Fe, Al)의 농도를 분석하였다. 연구결과에 따르면, 일부 정점에서 Pb, Mn, As를 제외하면 모든 중금속 농도의 분포는 입도 및 TOC의 분포와 유사하게 황해 중앙해역에서 상대적으로 높고, 한국 연안으로 갈수록 감소하는 경향을 보였다. 입도와 중금속 농도간의 관계를 통하여 대부분의 금속은 입도가 세립할수록 농도가 높게 나타나는 일반적인 경향을 보였다. 그러나 일부 정점에서 Pb은 조립질 퇴적물에서의 암석기원(feldspar) 영향, Mn은 생물기원($CaCO_3$) 영향, As는 중광물(pyrite) 특성에 따라 분포 양상이 다르게 나타났다. 과거에 조사한 자료(2000년)와 비교했을 때, 황해 동부해역에서 지난 15년 동안의 추가적인 중금속 농축은 없었고, 투기해역에 대한 저질환경은 과거에 비해 크게 개선되지 못한 것으로 나타났다. 연구해역 내 모든 중금속의 농도는 한국과 중국에서 규정하고 있는 최소기준(TEL, MSQ-1)보다 낮았지만, 농축지수(enrichment factor; EF), 농집지수(geo-accumulation index; $I_{geo}$), 생태위해성지수(ecological risk index; ERI)는 Cu, Pb, Zn, Cr이 황해 중앙해역에서 상대적으로 높게 나타났다. In order to determine the distribution characteristics of the heavy metals in surface sediments of the eastern Yellow Sea, heavy metal concentrations (Cu, Pb, Zn, Cd, Cr, Mn, As, Ni, Co, Li, Fe and Al) together with grain size and total organic carbon (TOC), were analyzed. The concentrations of all heavy metals, with the exception of Pb, Mn and As in some stations, were relatively high in the central area of the Yellow Sea and tended to decrease toward the Korean coast. A significant relationship between grain size and concentrations of heavy metals suggested that they were mostly controlled by quartz dilution effect. However, at some stations, Pb, Mn and As exhibited different distribution patterns. For Pb, the differences were caused by petrogenetic influences (feldspar) in coarse-grained sediments. In the case of Mn, biogenetic influences ($CaCO_3$) affected distribution patterns. As was distributed differently because of the existence of a heavy mineral (pyrite). A comparison with previous data (collected in 2000) shows that the heavy metal concentration in the eastern Yellow Sea has not increased over the past fifteen years. The sedimentary environment of dumping sites in the Yellow Sea has not been significantly improved during this period. The results of the pollution assessment revealed that the concentrations of heavy metals in the study area were lower than lower criteria (TEL, MSQ-1) in Korean and Chinese sediment quality guidelines. The enrichment factor (EF), geo-accumulation index ($I_{geo}$) and ecological risk index (ERI) of Cu, Pb, Zn and Cr were higher in the central area of the Yellow Sea.
윤원중(Won-Jung Yoon),강용진(Yong-Jin Kang),선철용(Chul-Yong Sun),박규식(Kyu-Sik Park) 한국지능시스템학회 2009 한국지능시스템학회 학술발표 논문집 Vol.19 No.2
본 논문에서는 금융위기 발생 이전에 위험성을 알려주는 장치인 조기경보시스템에 대하여 연구하였다. 1997년 금융위기기간의 KOSPI를 대상으로 신호처리기법을 적용하여 의미있는 특징들을 추출한 후 SVM을 이용하여 학습하였다. 학습된 SVM분류기에 1994년부터 현재까지의 KOSPI를 사용하여 실험한 결과 굵직한 사건들과 함께 주식시장이 영향을 받았던 금융위기구간을 잘 검출해내는 모습을 확인할 수 있었다.
심포지엄-專門病理士(전문병리사) 制度(제도)어떻게 할 것인가? : 임상검사전문기사제도의 모형개발 연구
황선철 ( Whang Sun Chul ),이창규 ( Lee Chang Kyou ) 대한임상검사과학회 1993 대한임상검사과학회지(KJCLS) Vol.25 No.1
Nearly 20,000 laboratory personnel licensed under the Law of Medical Technologists in Korea are classified in one single category of the class. That is “ Medical Technologist." The law was enacted as early as in 1963, and almost remains same as that of the begining only with minor revision in phrases but no changes in backbone. In the mean time, quite a remarkable changes took place in education program for the medical laboratory science, for example, junior college education system from which the predominant number of medical laboratory technologists have been produced was extended to 3-year program from previous 2 years, 4-year BS program and graduate course of the field were initiated. But the licensure system still continues same without any consideration on the specialty or categorizing for the qualified technologists. The necessity of the re-classification has been conceived widely, and consequently, a model classification system for the specialist program in medical laboratory science is established. The justification of the study was emphathized for the adequate service for patient care and acceleration of quality of medical laboratory science. Also to minimize some transient negligence in equal opportunity and misconception, very delicate factors, such as appropriate pay scales for the specialists or sub-specialists and compensation of educational background, have been carefully considered and stressed. Others include : 1. Level of certificate examination should be appropriate and standardized, therefore, candidates are not discouraged to take the test. 2. A certain length of grace period should be given for those who are not currently prepared to take the test. 3. Accredidation or affiliation of education or training f acilities should strictly be chosen, therefore, candidates must be given equal level of training opportunities. 4. Once approved as training institution, the quality of training should well-standardized regardless location or size of the institution.
허선철(Sun-Chul Huh),박원조(Won-Jo Park),김귀남(Gwi-Nam Kim),박준성(Jun-Sung Park),최부영(Boo-Young Choi) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
Recently, shipbuilding design techniques is developing so fast. As a result, vessels and plant became large, and is required arctic vessel for polar resource development. However, steel show brittle nature at reduce temperature. So research of character is increased under low temperature. In this study, thick plate has been used to measure the fracture toughness to evaluate at low temperature, using AIS3000 indentation tester and impact tester. And micro structure analysis for fracture surface has been observed by SEM.