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강혜정,최우정,곽진협,박현진,백누리,김한용 한국토양비료학회 2024 한국토양비료학회지 Vol.57 No.1
The Agricultural Environment Conservation Program (AECP) of the Korean government aims to protect the agricultural environment and ecosystem through reduction of the uses of chemical fertilizers and pesticides. The AECP, which is consisted of individual (16 activities) and community (14 activities) activities, has been implemented in 2019, and thus it is necessary to evaluate the overall performance of the 30 activities to reform and advance the AECP. In this study, we studied farmers’ participation and effectiveness, difficulty, and preference of the activities by farmers through farm-level survey. Results showed that participation and preference for community activities to improve village living conditions and landscape were higher than individual activities such as nutrient management, soil erosion control, and pesticide reduction, which are directly associated with the conservation of agricultural environment and ecosystem. Therefore, we suggest that government’s support is needed to enhance individual activities on farmland rather than community activities. In addition, amongst the individual activities, the participation in and preference for the activities related to soil loss and nutrient runoff management and pesticide use reduction were lower than those for nutrient management activities probably due to difficulty in the practice of these activities. Therefore, more intensive education programs and additional funding to support the implementation of the activities for soil conservation and pesticide reduction are strongly necessary.
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고등학생의 학업 자율성과 진로결정 자율성에 따른 잠재집단 유형 분석
강혜정,임은미 한국상담학회 2017 상담학연구 Vol.18 No.4
This study was to identify latent group subtypes according to Academic Autonomy and Career Decision-Making Autonomy of high school students and understand characteristics of each group. In addition, it was tested whether any variable predict the odds of latent group. A total of 6 latent groups were identified as a result of latent profile analysis of the responses of 563 students attending high school in J province. The subtypes according to the characteristics of each latent group are named as follows; ‘Career & academic autonomy group’ performing autonomous academic activities and career activities; ‘Career & academic control group’ participating by external control or internal relevance, ‘Career-value group’ with low autonomy in academic area but high autonomy in career, ‘Moderate group’ participating averagely in a given activities without specific reason, ‘Career-amotivation & reward-focusing academic group’ performing academic work in order to obtain compensation but without motivation in career, and ‘Academy-amotivation & low career motivation group’ being indifferent to any activity. We empirically confirmed the relevance to academic and career decision-making autonomy through six groups. To investigate the effects of the autonomy-related variables such as neuroticism, academic self-efficacy, career decision-making self-efficacy and career-related parent support on the classification of latent group, multinominal logistic regression analysis was performed. The higher degree of academic self-efficacy, career decision-making self- efficacy and career-related parent support, the more likely to belong to High autonomy group which is the ‘Career & academic autonomy group’. Academic self-efficacy was the most variable on latent group classification. The implication and limitation of this study were discussed. 본 연구에서는 고등학생들의 학업 자율성과 진로결정 자율성 수준을 종합하여 잠재집단 유형을 파악하고 그 특징을 살펴본 후 각 집단 구분을 유의하게 설명하는 변인을 확인하였다. J도 소재의 고등학교에 재학 중인 학생 563명의 응답결과에 대하여 잠재프로파일 분석을 실시한 결과 총 6개의 잠재집단이 나타났다. 각 잠재집단의 특성에 따라 학업 수행과 진로 활동을 자율적으로 수행하는 ‘진로학업 자율 집단’, 외적 통제나 내적 유관성에 의해 참여하는 ‘진로학업 통제중심 집단’, 학업영역에서는 자율성이 부족하지만 진로영역에서는 자율성이 높은 ‘진로 가치중심 집단’, 두드러진 이유 없이 주어진 활동에 평균적으로 참여하는 ‘보통 집단’, 진로영역에서는 동기가 없고 학업영역에서 보상을 위해 수행을 하는 ‘진로무동기 보상중심 학업 집단’, 학업과 진로의 모든 영역에서 어떠한 활동에도 무관심한 ‘학업무동기 낮은 진로동기 집단’이라 명명하였으며, 학업과 진로영역의 관련성을 경험적으로 확인하였다. 자율성과의 관련 변인으로 보고된 신경증, 학업적 자기효능감, 진로결정 자기효능감, 진로관련 부모지지가 잠재집단 분류에 미치는 효과를 알아보기 위해 다항로지스틱회귀 분석을 실시한 결과 학업적 자기효능감, 진로결정 자기효능감과 진로관련 부모지지가 높을수록 가장 자율적인 집단인 ‘진로학업 자율 집단’에 속할 확률이 증가하였으며, 학업적 자기효능감이 잠재집단 구분을 가장 많이 설명하는 변인으로 나타났다. 본 연구의 의의와 제한점을 논의하였다.
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자생 희귀콩인 납떼기콩으로부터 초음파를 이용한 폴리페놀 성분의 추출 공정 최적화
강혜정,박준성 사단법인 대한화장품학회 2022 대한화장품학회지 Vol.48 No.3
The active ingredients of Napttegi Kong(GML, Glycine max landrace), a type of native rare soybeans, were identified, and an ultrasonic extraction method was introduced as an eco-friendly extraction method. Through the component analysis of the Napttegi Kong extract, the epicatechin, which was not found in conventional soybeans, was identified. For effective extraction using ultrasonic, the main extraction conditions were optimized using the response surface analysis method. Through the Box-Behnken design process, 15 experiments were conducted with the extraction temperature, the ratio of extraction solvent/solution, and extraction time as key independent variables. A quadratic regression equation for the two dependent variables, epicatechin content and total isoflavone content, was derived, and the coefficients of determination were found to be high as R2 = 0.9939 and R2 = 0.9844, respectively, confirming that the correlation showed high significance. The extraction conditions satisfying the maximum expectations of these two dependent variables were predicted. to be 40.4°C of extraction temperature, 19.3 times of extraction solvent/solution, and 91 sec of extraction time. The expected value and the actual experimental value of the epikatechin content and the total isoflavone content were similar, so it was confirmed that this experimental method is a highly reliable optimization model. 자생 희귀콩의 한 종류인 납떼기콩(Glycine max landrace)의 활성 성분을 확인하고 이의 친환경적인추출 방법으로 초음파 추출 방법을 도입하였다. 납떼기콩 추출물에 대한 성분 분석을 통해 기존 일반콩에서는발견되지 않은 에피카테킨 성분을 확인하였다. 초음파를 활용한 효과적인 추출을 위해 통계학적 분석 방법인반응 표면 분석법을 이용하여 주요 추출 조건을 최적화를 수행하였다. Box-Behnken design 프로세스를 통해추출온도, 추출용매/용질의 비율, 추출 시간을 핵심 독립 변수로 하는 15가지 실험이 수행되었다. 두 가지 종속변수인 에피카테킨 함량과 총 이소플라본 함량에 대한 2차 회귀식과 이의 결정 계수는 각각 R2 = 0.9939 와R2 = 0.9844로 높게 확인되어 상호 관계가 높은 유의성을 보이는 것으로 확인되었다. 이 두 가지 종속 변수의최대 기대치를 만족하는 추출 조건은 추출온도 40.4 ℃, 추출용매/용질의 비율 19.3 times 및 추출 시간 91 sec 로 예측되었다. 이에 대한 에피카테킨 함량과 총 이소플라본 함량의 기댓값과 실제 실험값이 유사한 결과로확인되어 높은 신뢰성이 있는 최적화 모델임을 확인하였다.
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