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- 저자 : 이봉주 ( Lee Bong Joo ) (검색결과 127 건)
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수위-유량 관계곡선을 이용한 수막재배용 지하수 사용량 추정
이봉주 ( Bong Joo Lee ),김용철 ( Yong Cheol Kim ),조병욱 ( Byung Wook Cho ),윤욱 ( Uk Yoon ),하규철 ( Kyool Chul Ha ),이병대 ( Byeong Dae Lee ),문상호 ( Sang Ho Moon ),윤필선 ( Phil Sun Yoon ),김성윤 ( Sung Yun Kim ) 대한지질공학회 2015 지질공학 Vol.25 No.1
A method is proposed to estimate groundwater usage for water curtain cultivation (WCC) using a rating curve, and it is applied to field measurements of groundwater discharge used for WCC in Wangjeon-ri, Nonsan. During the winter season, the hydraulic components of irrigation ditches in the study area consist mainly of direct run-off and groundwater discharged from nearby pumping wells. Changes in stage of the ditches were monitored, and a baseflow separation method was applied to remove increments in stage due to direct run-off. The resulting records of stage were translated to groundwater discharge by applying the-stage-discharge relation. The estimated average groundwater discharge for the WCC in Wangjeon-ri was 10,900 m3/d or 420 m3/d/ha when the estimation is normalized by the total area for WCC facilities of this region. Applying this estimation (420 m3/d/ha) to the entire area of the WCC in Korea (10,746 ha),and considering the number of pumping days for the WCC (120 days/year), the total ground water usage for the WCC nation-wide is estimated to be 0.54 billion m3. This is equivalent to 32% of the total groundwater discharge for agricultural use in Korea (1.7 billon m3).
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교육복지투자우선지역 지원사업의 학업성취 효과 종단적 분석
이봉주(Bong Joo Lee),문혜진(Hey Jin Moon),김정은(Jung Eun Kim) 한국아동복지학회 2014 한국아동복지학 Vol.- No.45
교육복지투자우선지역 지원사업이 시행된 지 11년이 경과하였으나 사업의 학업성취 효과는 불분명한 상태였다. 이 연구는 교육복지투자우선지역 지원사업의 학업성취 효과를 확인하기 위하여 서울아동패널 자료를 활용, 초등학교 4학년에서 중학교 3학년까지 6년간의 교복투 사업이 아동의 주관적 학업성취와 교과별 학력평가 점수에 미친 영향을 추정하였다. 분석 결과, 회귀모형에서는 교복투 사업이 아동의 학업성취에 부적 영향을 미치거나 유의한 효과가 없는 것으로 나타났으나, 아동의 비관측 이질성을 통제한 고정효과 모형을 통한 추정에서는 교복투 사업이 아동의 학업성취 수준에 긍정적 효과를 발휘한 것으로 나타났다. 이러한 결과는 분석 기간을 장기화하고 보다 정교화된 종단 분석 방법을 활용하여 선행 연구에서 확인되지 못한 교복투 사업의 학업성취 효과를 확인한 것으로, 향후 아동의 교육기회 불평등을 제거하기 위해 학습능력 제고를 위한 보다 집중적이고 적극적인 투자와 노력이 필요함을 의미한다. The primary purpose of this study is to evaluate the effectiveness of the Supportive Project for the Priority Region of Educational Welfare Investment(SPPREWI) on children`s school achievement. While it has been more than 11 years since SPPRRWI was put into action in Korea, previous studies have failed to identify a clear effect of SPPREWI on school achievement. Using the subsample drawn from the 1st (2004) to 6th (2009) wave of Seoul Child Panel Study, we examined the effect of SPPREWI on children`s subjective perception of their school achievement and the academic test evaluation scores on Korean, mathematics, and English. The results from the ordinary least square regression analyses show that SPPREWI has a negative or no impact on school achievement by subject and grade. However, the results from fixed-effect models, controlling for the unobserved heterogeneity, showed that the students of SPPREWI are more likely to have higher school achievement than their counterparts. Unlike the previous studies on the association between SPPREWI and school achievement, the findings from this study showed positive SPPREWI effects. We suggest that these findings are due to methodological advantage of the panel data with longer duration of observation and statistical method controlling for unobserved heterogeneity. The study findings have implications for policies to promote future investment and continuous support for students to reduce educational inequality.
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이봉주(Lee Bong-Joo),김예성(Kim Ye-Sung),임정임(Lim Jeong-Im) 한국청소년정책연구원 2009 한국청소년연구 Vol.20 No.2
본 연구는 학교폭력예방프로그램의 개발과정 및 효과성 평가에 관한 연구이다. 본 프로그램은 학생뿐만 아니라 학교, 가정, 지역사회를 개입대상으로 포괄하였으며, 논리모델에 입각하여 구체적인 프로그램 내용을 개발하였다. 연구자와 실무자들의 논의를 거쳐 다섯 가지 클라이언트 체계조건이 도출되었으며, 이에 기반하여 구체적인 프로그램을 구성하고, 폭력에 대한 허용도 감소와 대처능력 증가라는 중간적 성과와 실제적인 학교폭력 경험 감소 및 학교안전감 증가라는 궁극적 성과를 설정하였다. 효과성 평가 결과, 프로그램 참여는 폭력에 대한 허용적 태도 감소에는 유의미한 영향력을 미치는 것으로 확인되었으나, 궁극적 성과에 대한 프로그램의 직접적인 영향은 통계적으로 유의미하지 않은 것으로 나타났다. 프로그램 참여의 간접적인 영향을 심층분석하기 위하여 논리모델에 따른 연구모형을 기반으로 구조방정식 모형을 활용하였다. 프로그램 효과성 경로를 분석한 결과, 프로그램 참여는 폭력에 대한 허용적 태도를 감소시키고, 이는 다시 직접적 또는 폭력에 대한 대처능력을 매개로 하여 학교폭력 감소와 학교안전감 증대에 유의미하게 작용하는 것으로 나타났다. 이러한 결과에 비추어 학교폭력예방프로그램의 보완 방안과 실천적 함의를 논의하였다. In this study, we present findings on the program development process and evaluation of a school violence prevention program. The prevention program was designed to target students, teachers, parents and community residents and utilized the above groups as participants. Based on a logic model, five conditions of a client system were developed and from which specific intervention activities were developed. Researchers and field workers worked together throughout the model development process. For the evaluation of the effectiveness of the program, regression analysis, a structural equation model were used. In regression an alysis, we found that the program had significant effects on decreasing the level of acceptance of violence. However, in the regression analysis, we found that participation in the program had no direct effects on the students' coping ability in regards to violence, their experiences of school violence, and sense of school safety. In order to examine pathways of indirect effects of the program on the final outcomes, we used structural equation model analysis. We found that the program indirectly decreases the experiences of school violence and increases the sense of school safety by decreasing the level of acceptance of violence and increasing the coping ability with regard to violence. Various theoretical and practical implications for social work practice, focusing on improving school violence prevention programs, were also discussed.
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이봉주 ( Bong Joo Lee ),문상호 ( Sang Ho Moon ),김기표 ( Gee Pyo Kim ),김용철 ( Yong Cheol Kim ),김용제 ( Yong Je Kim ),고기원 ( Gi Won Koh ) 대한지질공학회 2008 지질공학 Vol.18 No.3
A new ground water sampler was developed and evaluated for target depth sampling under most rigorous field conditions. This new concept sampler comprises an air-cylinder, a hypodermic needle and a sampling bottle. Pressurized air or nitrogen gas can be used as a mechanical power source to operate the sampler. The air-cylinder is used to jab the hypodermic needle into the rubber cap of the sampling bottle. The hypodermic needle functions as a pathway to inject groundwater into the sampling bottle. Field test was conducted in a seawater intrusion monitoring well located at Handong district of Jeju Island. Water qualities in this well are periodically changed from the effects of sea water. Water sampling for the same target depth in this well were tried at various times, and variations in electrical conductivity and pressure at the inside and outside of the sampler were measured using CTD divers. We found that the device could collect water samples only when it was actuated, and the pattern and range of variations in electrical conductivities and pressures measured at the inside and outside of the sampler were nearly identical. These results indicate that water samples using the sampler presented in this study represent correctly water qualities in which the samplings were made at a specific target depth in a well.
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