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諸元穆,鄭渭得,金冕燮 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-
回轉圓板을 利用하여 COD除去와 室酸化를 同時에 效率的으로 達成하기 위하여 일련의 實驗을 行하였다. 回轉圓板에서 박리시킨 Sludge를 현탁 狀態에서 利用하여 室酸化에 미치는 pH의 影響을 檢討하였으며, 最適 pH값은 7.5∼8.5이었다. 많은 量의 酸素供給에 依해서도 室酸化는 增加되지 않았으며, 그 까닭은 놓은 COD負荷條件下에서 COD를 利用하는 微生物君에 依해 두꺼워진 生物膜이 室酸化에 必要한 酸素와 基質移動을 制限한 때문인 것으로 推定되었다. 回轉圓板을 利用한 室酸化를 爲해서는 COD負荷는 0.027㎎/㎝²·hr以下로 制限되어야 하고, 또 높은 COD와 無機室素를 合有하는 廢水의 處理에는 多段 System이 適用되어야 한다는 것을 알 수 있었다. Rotating biological disc contactor system was used in order to accomplish the COD removal and nitrification simultaneously in one step. The effect of pH on nitrification rate was examined in a suspended growth system, using microorganism scraped from the rotating discs, and an optimum pH value was between 7.5 and 8.5. Nitrification was not accompanied by a large amount of dissolved oxygen supplied in the system. This might be attributed to the inreased thickness of the COD-utilizer-biofilm limited oxygen and substrate transfer for nitrification under high COD loading. It was found that the COD loading must be reduced to below 0.027㎎/㎝²·hr, for nitrification to occur in the rotating disc system, and that a multi-stage system could improve the treatment of waste water containing both high COD and inorganic nitrogen.
배위섭(Bae, Wi-Sup),정태문(Chung, Tae-Moon),최성호(Choi, Sung-Ho),허은녕(Heo, Eun-Yeong),조동호(Cho, Dong-Ho) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
현행 농어촌전화촉진법에 의한 10호이상 도서전화사업이 2006년 말까지 완료될 예정임에 따라 전국적으로 43개에 달하는 10호미만 미전화유인도서 및 벽지지역에 대한 전화사업의 필요성이 제기되었다. 10호미만 도서지역의 전화사업을 위하여 도서전화사업의 기본취지인 전력정책의 보편공급목표를 달성하면서 사회적 경제적비용을 최소화할 수 있는 방법의 채택이 요구되었다 본 연구에서는 대부분의 도서지역이 채택하고 있는 기존의 디젤방식과 최근 활발한 보급이 이루어지고 있는 태양광 풍력 등 신재생에너지에 의한 발전방식의 기술적 옵션에 대한 타당성 분석을 실시하였다. 10호미만 도서지역과 5호미만 벽지지역에 디젤엔진과 태양광 등 신재생에너지를 보급할 경우 발생될 기술적, 경제적 비용의 분석을 실시하였으며 연구 결과 소규모 도서지역과 벽지에서는 태양광이 디젤엔진보다 경제적인 대안으로 판명되었다.
보행 시 신발의 아웃솔 형태가 하지 관절 운동과 발의 압력에 미치는 영향
김의환 ( Eui Hwan Kim ),김성섭 ( Sung Sup Kim ),권문석 ( Moon Seok Kwon ),위웅량 ( Ung Ryang Wi ),임정 ( Jung Lim ),정재욱 ( Chae Wook Chung ) 한국운동역학회 2011 한국운동역학회지 Vol.21 No.2
The purpose of this study was to analysis the effect of form and hardness of outsoles on the motion of the lower extremity joints and on foot pressure during gait. The subjects were 15 women(mean age, 48.5±2.4years), who had no serious musculoskeletal, coordination, balance or joint/ligament problems within 1 year prior to the study. The pelvic tilt, joint angles at the lower extremities and the vertical ground reaction force(GRF) were compared during gait with 3 types of shoes (A, B, C) by using one-way repeated ANOVA(p<.05). During gait, the peak tilt angle and the range of motion(ROM) of the ankle and knee joints were found to be significantly different among the 3 types of shoes. The type C shoes showed a significantly lower mean second maximum vertical GRF than types A and B. The curved outsoles of type C shoes, which had a form and hardness different from those of A and B, was designed strategically for walking shoes to provide stability to the Additionally, type C induced the dispersion of eccentric pressure and made the center of pressure roll over to the center line of the foot.
< 51Cr > Cr ( III )-EDTA 착물 합성 및 < 51Cr > Cr ( III )-EDTA 주사후 두경부 방사능 계측에 의한 사구체 여과율 측정
양승대,임상무,전권수,서용섭,윤용기,박현,우광선,정위섭,오옥두,이종두 ( Seung Dae Yang,Sang Moo Lim,Kwon Soo Chun,Yong Sup Suh,Yong Ki Yoon,Hyun Park,Kwang Sun Woo,Wi Sup Chung,Jong Doo Lee,Ok Doo Oh ) 대한핵의학회 1994 핵의학 분자영상 Vol.28 No.3
The purpose of this study is to evaluate the clinical application of the no carrier added[Cr] Cr(UI) EDTA complexes, produced at Korea Cancer Center Hospital. The [Cr]Cr(lll) EDTA complexes, useful for measurement of GFR were prepared at room temperature in the presence of bicarbonate catalysts. The radiochemical purity of[Cr]Cr (Iil) EDTA was over 99% by paper electrophoresis. The time activity curves were obtained by counting the blood samples from 5 volunteers and counting the head and neck regions with whole body counter after inject#ion of the Cr EBTA, respectively, After the nonlinear regression, the area under curve was obtained. The plasma clearance of the Cr-EDTA was calculated with injected dose/AUC. The clearance rate calculated with the head and neck countmg data was in good agreement with t,he result from the plasma sample radioactivity at, 1-3 hrs after injection. From this result, the counting of head and neck region and the nonlinear regression by 2-compartment model could be applied for the measurement of the clearance rate. Using MIRD system, the absorbed radiation dose was calculated by residence time x S. The absorbed whole body radiation dose was negligibly small.