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샘플링방법에 따른 생활폐기물 소각시설의 CH₄ 배출계수 비교 연구
이대겸(Lee, Dae-Kyeom),김성동(Kim, Seong-Dong),이화수(Lee, Hwa-Soo),전의찬(Jeon, Eui-Chan) 한국기후변화학회 2020 한국기후변화학회지 Vol.11 No.5
In order to actively respond to the framework convention of climate change, it is necessary to estimate emissions using reliable emission factors. Compared to the energy and industry sectors that emit large amounts of greenhouse gases, the waste sector is relatively lacking in greenhouse gas studies. In particular, non-CO₂ in the waste sector has fewer studies of greenhouse gases than CO₂. In this study, CH₄ emission factors for domestic waste incineration facilities were compared according to sampling methods that included intermittent collection, continuous collection, and continuous measurement. Sampling methods suitable for developing CH₄ emission factors for domestic waste incineration facilities were derived. Statistically, there was no difference in CH₄ emission factors according to sampling method at the 95% confidence level. Therefore, intermittent collection, continuous collection, and continuous measurement sampling can be used to develop CH₄ emission factors for domestic waste incineration facilities.
아동복지시설 아동의 사회적 기술 향상을 위한 집단상담 프로그램 개발 및 효과검증
이대규,변상해,문인숙,정의정,Lee, Dae-Gyu,Byun, Sang-Hae,Moon, In-Sook,Jeong, Eui-Jeong 한국벤처창업학회 2010 벤처창업연구 Vol.5 No.1
The purpose of this study is to develop and to verify an effect of a group counselling program for children who are in need of improving social skills and relationships. In order to meet this goal, the study procedure was employed as follows: First, the literature review of studies on childrens in social welfare institutions was implemented. Second, to analyze need of staffs in facilities and to specify the present condition of children, 100 staffs were participated in basic investigation. The result of investigation revealed that social skill development programs should be held in form of total 11~12 sessions once or twice in a week, with 50~60 minutes per session. Third, based on the literature review and current situation investigation results, a program for improving social skills and competencies of children was developed. To verify the program, two groups composed of elementary children who are fourth grade to sixth grade were organized. The groups were a experimental group which was provided with a group counselling program and a control group with no program. The program was composed of twelve sessions throughout six weeks, and the subjects took social skill test after taking the program to verify educational effects. T-test were implemented to analyze difference of the test results of two groups statistically. As a result of a research, following major two findings were specified: (1) experimental group showed significant difference in the score of self-assertion, cooperation, and self-control, which indicates that the program was effective for social skill improvement: (2) according to the test result, the self-assertion, cooperation, and self-control skills were clearly improved. In conclusion, the program turned out to be an effective and a positive educational device to enhance social skills of the children. The program developing model were suggested to improve social skills of children in the state of family devision based on the study findings. The follow-up future studies should elaborate program models for various-aged children and for children with various learning styles. Furthermore, qualitative study method should be employed which can specify social attitude change of children.
Wrap Through 태양전지의 효율 향상을 위한 Hole 가공과 열처리 기술
홍근기(Hong, Keun-Kee),이대종(Lee, Dae-Jong),정우원(Jung, Woo-Won),이홍구(Lee, Hong-Gu),현덕환(Hyun, Deoc-Hwan),양병기(Yang, Byung-Ki),이성은(Lee, Seong-Eun),조재억(Cho, Jae-Eock),홍정의(Hong, Jeong-Eui) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
In contrast to the conventional crystalline, back-contact solar cells feature high efficiencies, simpler module assembly, and better aesthetics. The highest commercialized cell and module efficiency is recorded by n-type back-contact solar cells. However, the mainstream PV industry uses p-type substrate instead of n-type due to high costs and complexity of manufacturing processes. Therefore p-type back-contact solar cells such as metal wrap-through and emitter wrap-through which are low cost and compatible with current PV industry have been developed. In this paper, we studied for hole formation process and firing process of EWT solar cells, status and prospects for development of EWT solar cell will be discussed.