본 연구는 평가 매체가 유아의 이야기 이해력에 미치는 영향을 알아보기 위해 만 5세 유아를 대상으로 연구하였다. 평가 매체는 컴퓨터동화와 그림동화로 두 평가 매체간의 이야기 이해력의 차이를 알아본 결과 컴퓨터동화가 그림동화매체보다 더 많은 긍정적 영향을 미쳤다. 이야기 이해력의 하위 평가인 다시말하기에서는 컴퓨터동화 매체가 그림동화 매체보다 더 많은 긍정적 영향을 미쳤고, 듣기이해력에서는 두 평가 매체간에 차이가 나타나지 않았다. 또한, 총 10회로 평가한 유아의 이야기 이해력은 어떠한 변화경향을 나타내는가를 알아보고자 하였고, 연구 결과 두 평가 매체 모두 점진적 향상을 나타내는 1차 경향으로 나타났다.

This study was conducted to evaluate capability of dyeing wastewater treatment for 3 type reactors. These reactors were Packed Bed Reactor(PBR), Fluidized Bed reactor(FBR) and Moving Media Complete Mixing Activated Sludge reactor(MMCMAS). Experiments of PBR and FBR were performed by various packing ratios and organic loading rates, experiments of MMCMAS were performed by various organic loading rates In order to obtain SBOD_5 removal efficiencies of more than 90%, the F/Mv ratios of PBR, FBR, MMCMAS were 0.11 ㎏BOD/㎏MLVSS·d, 0.12 ㎏BOD/㎏MLVSS·d, and 0.37 ㎏BOD/㎏MLVSS·d, respectively. So MMCMAS system which has more active microorganisms showed better capability of organic removal and also stronger dynamic and shock loadings than those of PBR and FBR. In PBR and FBR, the media packing ratio of 20% showed better performance of organic matters removal effciencies than 10% and 30%, but sludge production rate at media packing ratio of 30% was relatively lower than that of 10% and 20%. When more than 90% organic matters removal efficiency was obtained, the ratios of attached biomass to total biomass at PBR, FBR, MMCMAS were 89∼99%, 87∼98%, and 54∼80%, respectvely. The ratio of attached biomass to total biomass was low in MMCMAS. This was formation of thin biofilm due to shear force between rotating disc and water. The average sludge production rates(㎏VSS/㎏BODrem.) of PBR, FBR and MMCMAS were 0.20, 0.29 and 0.54, respectively.

This study was conducted to investigate the biological treatment capability of MMCMAS(Movinig Media Complete Mixing Activated Sludge) reactor for high strength organic wastewater (Average BOD=800㎎/ℓ). And this experimental results were compared previous study for low strength organic wastewater (Average BOD=150㎎/ℓ) by the same reactor. In this study, we abtained following conclusions ; (1) The laboratory MMCMAS reactor demonstrated that SBOD removal efficiencies of more than 90% can be achieved at organic loading rates of 30.9 gBOD/㎡/d for high strength organic wastewater and 39.4 gBOD/㎡/d for low strength organic wastewater, respectively. (2) The nitrification rates of MMCMAS reactor was found same results of similiar organic loading rates. (3) The ratio of attached biomass to total biomass on the moving media varied in the range of 40 to 63% and 32 to 94% for high and low strength organic wastewater, respetively. And it was varied at the various concentration of influents for the similiar organic loading rates. The sludge production rates was found approximately 0.37 gVSS/gBODrem. in MMCMAS reactor.

오늘날 선진국을 비롯한 세계 여러 나라들은 교육을 통한 국가발전에 비상한 관심을 가지고 교육의 개혁을 위해 많은 노력을 기울이고 있다. 2000년대를 얼마 남겨 놓지 않은 우리 나라의 경우도 미래의 첨단 과학 정보 산업사회를 이끌며 갈 제2세 국민을 위한 교육을 보다 내실있게 추진하기 위하여 여러 가지 방안을 모색하여 새롭고 창의적인 교육을 할 수 있게끔 꾸준한 연구가 이루어져야 할 것이다.