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차기철 ( Gi Cheol Cha ),황명구 ( Myoung Goo Hwang ),이명규 ( Myung Gyu Lee ),태민호 ( Min Ho Tae ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.2
A lab-scale Reverse Osmosis(RO) membrane reactor was installed to investigate the membrane permeability, characteristics of membrane fouling at each conditions, and performance of elimination at different trans-membrane pressure(TMP) in the liquid fertilizer accumulated system. Experimental setup was divided to three different TMP conditions. As a result of experiment, permeability of RO membrane was proportional to the increase of TMP and temperature. After experiment was completed, two types chemical cleaning(remove the organic foulant and inorganic foulant) was done, and recover rate of permeability was each 99.8, 99.7 and 99.7%, respectively. From this experimental data, membrane fouling could be determined that the most of it was recoverable in this system, and major reason of fouling was concentration polarization. Elimination rate of solute substance in the liquid fertilizer indicated very stable(above 99%), except ammonia nitrogen, and the most stable elimination rate was investigated at the highest TMP condition (Run 3).
축분액비의 고액분리 및 농축에 있어서 MF/RO 막의 투과특성
차기철 ( Gi Cheol Cha ),황명구 ( Myoung Goo Hwang ),정태영 ( Tae Young Jeong ),정형근 ( Hyung Keun Chung ),이영규 ( Young Kyu Rhee ),태민호 ( Min Ho Tae ),김동진 ( Dong Jin Kim ) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.5
Lab scale MF/RO system was conducted to investigate the characteristics of permeability, liquid-solid separation, and accumulation-elimination of liquid fertilizer which produced from thermophilic aerobic oxidation(TAO) system. As a result of comparison of plate-sheet type with hollow fiber type MF membrane, the permeability of hollow fiber was higher (1.2∼6 times) than plate-sheet type. Tmax was decreased gradually which related to the total solid(TS) concentration in the raw liquid fertilizer. From the pure-flux test, it is observed that most of membrane fouling was recoverable, and the inital filtration resistance of plate-sheet type was lower than hollow fiber. Remarkable accumulation of compositions of liquid fertilizer by RO membrane was investigated, and compositions of fertilizer accumulated about 3-4 times as compared with original solution, Elimination rate of solute substance in the liquid indicated very stable, except the period at final operating due to the concentration poralization, Elimination rate was proportional to the increase of the trans-membrane pressure(TMP) in the RO reactor.
혼성체육수업의 남학생 역차별이 체육교사에 대한 동일시, 체육수업의 재미, 몰입에 미치는 영향
이창섭(Chang Seop Lee),여정권(Jeong Kwon Yeo),윤대현(Dae Hyun Yun),황명구(Myoung Goo Hwang) 한국체육교육학회 2010 한국체육교육학회지 Vol.15 No.1
본 연구는 중학교 3학년 남학생들 대상으로 혼성체육수업의 역차별이 체육교사 동일시, 체육수업의 재미, 몰입에 어떠한 영향을 미치는가를 분석하는 것을 목적으로 수행되었다. 이를 위해 중학교 3학년 남학생 871명을 연구대상으로 선정하여 연구를 진행하였다. 수집된 자료는 SPSS-WIN 15.0을 이용하여 중다회귀분석을 통해 분석되었고, 다음과 같은 결론을 얻을 수 있었다. 첫째, 혼성체육수업의 처벌, 수업활동의 차별이 체육교사 동일시에 부적인 영향을 미쳤다. 둘째, 혼성체육수업의 역차별이 체육수업 재미에 부적인 영향을 미치는 것으로 나타났는데 평가의 차별은 사회성 함양에 긍정적인 영향을 미쳤다. 셋째, 혼성체육수업의 역차별이 체육수업 몰입에 부적인 영향을 미치는 것으로 나타났는데 평가의 차별은 체육수업과정 통합과 수업행동과 의식의 일치에 긍정적인 영향을 미치는 것으로 나타났다. 마지막으로, 혼성체육수업의 체육수업 재미가 체육수업 몰입에 긍정적인 영향을 미치는 것으로 나타났는데 수업의 용이성이 자기 목적적 경험에는 부적인 영향을 미치는 것으로 제시되었다. The purpose of this study was to analyze how reverse discrimination in coeducational classes affected students` overall enjoyment of P.E. students` personal identification with the P.E. teacher, and student`s flow. For achieving this purpose, some relevant questionnaires were distributed to 871 third grade male middle school students. This study drew the following conclusions. First, different methods of punishment between genders during class activity produced a negative effect on students` trust and identification with the P.E. teacher. Second, reverse discrimination in coeducational classes also produced a negative effect on the enjoyment of P.E., whereas differing standards in evaluation produced a positive effect on students` sociality. Third, while reverse discrimination in coeducational classes had a negative effect on students` absorption in P.E., differing gender requirements in student evaluations produced a positive effect on the accord between class behavior, consciousness, and the integration of the P.E. course. Finally, the overall enjoyment students experienced from a coeducational P.E. class played a positive role that improved student`s flow. The subsequently easier drills and exercises, however, were found to produce a negative effect on the overall experience for male students.