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김지형(Ji-Hyeung Kim),조남규(Nam-Gue Cho),이규성(Gue-Sung Lee),주광식(Gwang-Sig Joo),이한정(Han-Jung Lee),황의화(Eui-Hwa Hwang),고종명(Jong-Myoung Go),김용희(Yong-hee Kim) 대한환경위생공학회 2007 대한환경위생공학회지 Vol.22 No.3
본 연구는 인천항으로 유입되는 휴대농산물의 안전성 확보를 위하여 휴대량 초과로 인천본부세관에 유치되는 농산물 등을 검사하였다. 수거 검체는 건고추절편 또는 고춧가루, 곡류, 종실류, 콩류, 견과류, 한약재원료, 참기름 등 총 293건을 대양으로, 품목별로 잔류농약, 곰팡이수, 타르색소, 수단색소 Ⅰ, Ⅱ, Ⅲ, Ⅳ, 아플라톡신, 납, 카드뮴, 수은, 비소, 잔류이산화황 분석을 실시하였다. 1. 건고추절편 또는 고춧가루는 잔류농약동시다성분분석, 곰팡이수, 타르색소, 수단색소 Ⅰ, Ⅱ, Ⅲ, Ⅳ 검사를 실시하였고 이중 곰팡이수와 타르색소에서 부적합이 있었다. 2. 종실류는 타르색소 검사에서 불검출이었고, 콩류와 견과류의 아플라톡신 검사결과도 불검출이었다. 3. 곡류는 납, 카드뮴, 수은의 중금속 검사와 흑미의 경우 타르색소 검사를 추가하였고, 쌀 2건, 찹쌀, 율무, 조에서 각 1건씩 납 기준을 초과하였다. 4. 한약재 원료는 납, 카드뮴, 수은, 비소, 잔류이산화황 검사에서 대추 2건과 건강 3건에서 잔류이산화황이 기준을 초과하였고, 건강 1건에서 카드뮴이 부접합하였다. 5. 추석 전에 대거 유입된 참기름의 규격검사 결과는 모두 적합한 것으로 나타냈다. 6. 총 293건의 휴대농산물 가운데 건고추절편 또는 고춧가루 78건, 곡류 5건, 한약재 5건 등 88건에서 규격기준을 초과하여 30% 부적합율을 나타내었다, 시험항목 중에서는 곰팡이수 부적합 76건, 타르색소 1건, 곰팡이수와 타르색소 동시부적합 1건, 납 5건, 잔류이산화황 4건, 잔류이산화황과 카드뮴 동시부적합 1건으로 나타냈다. 7. 중금속 측정결과는 곡류에서 Pb 0.000~0.740㎎/㎏(0.191±0.209), Cd 0.000~0.108㎎/㎏(0.007±0.020), Hg 0.000~4,201㎎/㎏(0.162±0.319)으로 나타났으며, 한약재원료에서는 Pb 0.000~ 2.480㎎/㎏(1.130±0.730), Cd 0.000~0.761㎎/㎏(0.044±0.122), Hg 0.000~0.157㎎/㎏(0.022±0.033), As 0.000~0.560㎎/㎏(0.040±0.082), 잔류이산화황은 2.0~1459.4ppm(303.1±324.2)으로 나타났다. This study was investigated hazardous substances in agricultural products of baggage by Incheon Port from chinese. We tested 293 kinds of dried red pepper, cereal, sesame, bean, nut, herbal medicine and sesame oil for pesticides residue, mold, tar color, sudan Ⅰ, Ⅱ, Ⅲ, Ⅳ, aflatoxin, Pb, Cd, Hg, As and sulfur dioxide residues. Violated samples over standard limits by Korean Food and Drug Administartion (KFDA) were 76 dried red pepper over the number of mold and 1 dried red pepper detected red 102 tar color and 1 dried red pepper over the number of mold and detected red 102 tar color simultaneously. And 2 rice, 1 sticky rice, 1 adlay and 1 millet were over lead. Violated herbal medicine were 2 Zizyphi Furctus and 2 Zingiberis Rhizoma over sulfur dioxide residue and 1 Zingiberis Rhizoma over sulfur dioxide residue and cadmium simultaneously. The contents of heavy metals in cereal were as follow; Pb 0.000~0.740㎎/㎏(0.19±0.209), Cd 0.000~0.761㎎/㎏(0.044±0.122), Hg 0.000~0.157㎎/㎏(0.022±0.033), As 0.000~0.560㎎/㎏(0.040±0.082). Contents of SO₂ ranged 2.0~1459.4ppm(303.1±324.2).
황미용 ( Mi-yong Hwang ),조승준 ( Seung-joon Cho ),이순형 ( Soon-hyung Lee ),최용성 ( Yong-sung Choi ) 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.4
In this paper, we compared and analyzed the power load patterns of dormitory buildings and office buildings to use them as basic data (demand analysis and capacity design) for the design and operation of microgrids for multi-use facilities, and the following conclusions were got. During the daytime on regular weekdays, the power consumption load pattern of office buildings was relatively large at 264.0~332.3 kWh, and during the evening hours, the power consumption load pattern of dormitory buildings was relatively large at 233.0~258.3 kWh. In the case of vacation, during the daytime on weekdays, the power consumption load pattern of office buildings was relatively large at 279.1~407.4 kWh, and in the evening, the power consumption load pattern of dormitory buildings was relatively high at 280.1~394.1 kWh. During the daytime on regular weekends, the power consumption of dormitory-type buildings was relatively high at 133.5~201.6 kWh, and it was found that the power consumption of dormitory-type buildings appeared relatively high at 187.5~252.1 kWh. During a vacation in the daytime on weekends, the power consumption of dormitory-type buildings was found to be 186.5 kWh~ and 218.6 kWh. The increase in power consumption during a vacation (December-February) compared to normal (April-June) was thought to be due to an increase in electricity demand, and the reason for the higher power consumption in dormitory buildings during the vacation was due to reduced working hours in office buildings.
댐 붕괴 흐름에 의한 직립 홍수터의 범람 실험 및 모의
황승용(Hwang, Seung-Yong),김형석(Kim, Hyung Suk) 대한토목학회 2021 대한토목학회논문집 Vol.41 No.3
불연속 지형을 지나는 천수 흐름을 해석할 수 있는 Hwang의 기법이 채택된 수치 모의를 댐 붕괴 흐름에 의한 직립 홍수터의 범람 실험과 비교하였다. 모의 결과는 저수지, 저수로, 홍수터로 이루어진 실험 수로에서 측정한 결과와 잘 일치하였다. 특히, 댐 붕괴 흐름이 직립 홍수터로 차고 빠지는 과정이 잘 모의되었다. 흐름 저항의 종류에 따른 모의 결과의 차이는 미미하였다. 이 연구를 바탕으로 도심 하천의 범람 예측에서 정확도를 높일 수 있을 것으로 기대된다. Numerical simulation with Hwang’s scheme, which can analyze shallow-water flow over discontinuous topography, was compared with a laboratory experiment of flooding on a perpendicular floodplain with dam-break flows. The simulation results were in good agreement with the results measured in an experimental flume with a reservoir, channel, and floodplain. The wetting and drying process on a perpendicular floodplain with a dam-break flow was particularly well simulated. The difference in simulation results according to the type of flow resistance was insignificant. The results of this study are expected to improve the accuracy of predicting inundation in urban rivers.