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물리치료 전공대학생들의 진로선호도와 학습동기에 관한 연구
강준구,복원주,서유리,이도영,한동국,손경현,이경현,Kang, Jun-Gu,Bok, Won-Ju,Seo, You-Ri,Lee, Do-Young,Han, Dong-Guk,Son, Kyung-Hyun,Lee, Kyung-Hyun 대한물리치료과학회 2015 대한물리치료과학회지 Vol.22 No.2
Purpose : This study is to investigate on career preference after graduation and learning motivation of students majoring in physical therapy. Methods : This survey implement with 400 students majoring in physical therapy from 3 college and university in korea, jeonnam 394 of 400 attended this survey. The measured date were analysed by using repeated anova, frequency analysis, $x^2$-test, t-test. Results : The results of this study were as follows: Career preference showed significant difference between male and female in department of orthopedic physical therapy and showed significant difference all by workplace(general hospital, special hospital). Career preference didn't show significant difference by schol system(college, university) and showed significant difference by work place. Learning motivation(inner motivation) showed significant difference in male by gender. Learning motivation didn't show significant difference by school system.
BMP test를 통한 음폐수와 하수슬러지의 병합소화 특성 평가
이수영ㆍ윤영삼ㆍ강준구ㆍ김기헌ㆍ신선경(Su young LeeㆍYoung Sam YoonㆍJun Gu KangㆍKi Heon KimㆍSun Kyoung Shin) 유기성자원학회 2016 유기물자원화 Vol.24 No.1
혐기성 소화의 주요 조건 중 하나인 C/N비의 경우 하수슬러지는 5.40으로 낮게 나타난 반면 음폐수(Food waste leachate)는 21.84로 높게 나타났다. C/N비가 낮을 경우 혐기성소화의 저해 요인으로 작용될 수 있기 때문에 음폐수의 높은 유기물 농도 및 C/N 비를 활용하여 메탄가스 발생량 증가시킬 수 있었다. Tchobanoglous이 제안한 이론적 메탄가스 발생량 예측수식을 적용하여 메탄 및 바이오가스 발생량을 산정한 결과 하수슬러지 단일 혐기소화의 경우 305.6 mLㆍCH4/gㆍVS, 689.4 mLㆍCH4/gㆍVS의 메탄, 바이오가스가 발생하였고 음폐수 : 하수슬러지를 1:9로 혼합한 시료는 약 322 mLㆍCH4/gㆍVS, 3:7시료에서는 약 354 mLㆍCH4/gㆍVS, 5:5시료에서는 약 386 mLㆍCH4/gㆍVS의 메탄가스가 발생하는 것으로 분석되었다. BMP 실험 결과 1:9, 3:7, 5:5 비율로 병합 처리한 경우 각각 약 233, 298, 344 mLㆍCH4/gㆍVS의 메탄가스가 발생하였다. 따라서 음폐수의 혼합비율이 높아질수록 메탄가스 발생량은 증가하였고 하수슬러지와 음폐수의 혼합 비율에 따른 병합처리 시 하수슬러지 단독처리에 비해 다량의 메탄가스가 발생되었다. BMP 실험을 통해 생산된 메탄가스의 누적생산 곡선을 Modified Gompertz model과 first order kinetic model에 적용하여 추정한 결과, 메탄생성량은 Modified Gompertz model에서는 238.5, 302.3, 353.6 mL/gㆍVS 발생하였고 first order kinetic model에서는 242.8, 312.5, 365.5 mL/gㆍVS로 음폐수와의 혼합비율이 증가할수록 높게 나타났으며, 최대 메탄생성속도의 경우 3:7비율에서 48.2 mL/gVSㆍday로 최대 메탄생성 속도를 보였다. first order kinetic model의 1차 반응속도상수 k값은 1:9, 3:7, 5:5 비율에 따라 0.32, 0.22, 0.08day-1 나타났다. 1차 반응속도 상수의 경우 음폐수의 혼합비율이 낮을수록 높게 나타났다. Modified Gompertz와 first order kinetic model 모두 실험결과를 잘 모사하였으며, 실험결과와 모의결과의 적합도를 나타내는 상관계수(R2)의 경우 0.92∼0.98으로 높은 상관성을 나타내었다. We mix food waste leachate and sewage sludge by the proportion of 1:9, 3:7 and 5:5. It turns out that they produced 233, 298 and 344 CH4ㆍmL/gㆍVS of methane gas. The result suggests that as the mixing rate of food waste leachate rises, the methane gas productions increases as well. And more methane gas is made when co-digesting sewage sludge and food waste leachate based on the mixing ratio, rather than digesting only sewage sludge alone. Modified Gompertz and Exponential Model describe the BMP test results that show how methane gas are produced from organic waste. According to the test, higher the mixing rate of food waste leachate is, higher the methane gas productions is. The mixing ratio of food waste leachate that produces the largest volume of methane gas is 3:7. Modified Gompertz model and Exponential model describe the test results very well. The correlation values(R2) that show how the results of model prediction and experiment are close is 0.92 to 0.98.
커튼월 적용을 위한 CIGS 박막 모듈의 특성 분석 연구
강준구(Kang, Jun-Gu),장현호(Jang, Hyun-Ho),김진희(Kim, Jin-Hee),김준태(Kim, Jun-Tae) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
In this study, three different types of experimental models of BIPV curtain wall units with CIGS modules were built, and their thermal and electrical performances were analyzed. The experimental results showed that the temperature of the rear side of the CIGS module with the application of an insulation in the curtain wall spandrels was higher than a CIGS module standalone by 22℃, which results in a reduction in the power generation of the former by 8.3 % at most. Accordingly, when ventilation was applied to the model to improve the power generation performance, the module temperature was observed to be 14.2 ℃ lower compared to the enclosed type, and the power generation performance improved by 5 %. It confirmed that the temperature increase in the rear side of the CIGS module with insulation layer reduced the electrical performance of the module. Based on this, it is claimed that providing sufficient ventilation at the CIGS applied spandrels contribute to improve the power generation of the CIGS module.
커튼월 스팬드럴 적용을 위한 CIGS박막 모듈의 특성 분석 연구
강준구(Kang Jun-Gu),김준태(Kim Jun-Tae) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.3
In this study, three different types of experimental models of BIPV curtain wall units with CIGS modules were built, and their thermal and electrical performances were analyzed. The experimental results showed that the temperature of the rear side of the CIGS module with the application of an insulation in the curtain wall spandrels was higher than a CIGS module standalone by 22℃, which results in a reduction in the power generation of the former by 8%. On the other hand, when ventilation was applied to the model to improve the power generation performance, the module temperature was observed to be 14.2℃ lower compared to the enclosed type, and the power generation performance improved by 5%. It confirmed that the temperature increase in the rear side of the CIGS module with insulation layer reduced the electrical performance of the module. Based on this, it is claimed that providing sufficient ventilation at the CIGS applied spandrels contribute to improve the power generation of the CIGS module.
양면형 BIPV 시스템의 설치환경에 따른 발전특성 분석
강준구(Jun Gu Kang),김진희(Jin Hee Kim),김준태(Jun Tae Kim) 한국태양광발전학회 2015 Current Photovoltaic Research Vol.3 No.4
BIPV system is one of the best ways to harness PV module. The BIPV system not only produces electricity, but also acts as a building envelope. Thus, it has the strong point of increasing the economical efficiency by applying the PV modules to the buildings. Bifacial solar cells can convert solar energy to electrical energy from both sides of the module. In addition, it is designed as 3 busbar layout which is the same with ordinary mono-facial soalr cells. Therefore, many of the module manufacturers can easily produce the bifacial solar cells without changing their manufacturing equipment. Moreover, bifacial BIPV system has much potential in building application by utilizing glass to glass structure. However, the performance of bifacial solar cells depends on a variety of factors, ranging from the back surface to surrounding conditions. Therefore, in order to apply bifacial solar cells to buildings, an analysis of bifacial PV module performance should be carried out that includes a consideration of various design elements, and reflects a wide range of installation conditions. As a result it found that the white insulation reflector type can improve the performance of the bifacial BIPV system by 16%, compared to the black insulation reflector type. The performance of the bifacial BIPV was also shown to be influenced by inclination angle, due to changes in both the amount of radiation captured on the front face and the radiation transmitted to the rear face through the transparent space. In this study is limited design condition and installation condition. Accordingly follow-up researches in this part need to be conducted.