A Study on the Management Efficiency of “Seolhyang” strawberries Farms Used SBM-DEA Model with Undesirable Output

Yu-Cong Sun(손우총),Shi-Yong Piao(박세영),Shuang-Yu Hu(호쌍우),Sung-Chan Kim(김성찬),Jong-In Lee(이종인) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.7

본 연구에서는 농촌진흥청에서 조사한 ‘표준소득자료집’의 99명의 설향 딸기농가 조사사료를 이용하여 분석하였다. 이러한 자료로 SBM-DEA 모델을 활용하여 이산화탄소 배출량을 고려한 설향 딸기농가의 경영효율성 분석을 실시하였다. 분석결과 99명 농가 중 14명(14.14%) 농가의 기술효율성은 불변규모수익(CRS)일 경우, 효율적인 것으로 나타났다. 반면, 가변규모수익(VRS)의 경우, 99명 농가 중 30명(30.3%) 농가의 순수기술효율성은 효율적인 것으로 나타났다. TEVRS 가설, TECRS 가설, SE 가설을 통해 분석한 결과, 설향 딸기농가의 평균기술효율성은 0.53, 0.35, 0.60으로 나타났다. 그리고 Tobit모형을 통해 순수기술효율성에 영향을 미치는 요인을 분석하였다. 분석 결과 이산화탄소 배출, 난방여부, 재배면적 등 요인이 순수기술효율성에 부정적인 영향을 미치는 것으로 나타났다. 반면, 유기 비료의 비율은 높을수록 순수기술효율성이 높아지는 것으로 나타났다. 이는 유기비료를 많이 사용할수록 순수기술효율성에 긍정적인 영향을 미치는 것을 의미한다. 또한, 딸기농가의 재배경력은 순수기술효율성에 통계적으로 영향을 미치지 않는 것으로 나타났다. 따라서, 살충제 및 농약비용을 줄여야 하며, 지속가능한 딸기 생산을 위해 유기비료를 사용해야한다. 또한, 이산화탄소 배출 감소에 관한 농업정책을 설립할 필요가 있다. Ninety-nine strawberry farmers were assessed. A slacks-based and data envelopment analysis measure (SBM-DEA) of efficiency with an undesirable output was used to analyze the technical efficiency of farmers by taking carbon dioxide (CO2) as the undesirable output. Only 14 (14.14%) were technically efficient under a constant return to scale (CRS) and scale efficiency, while 30 (30.3%) households were technically efficient under variable return to scale (VRS). On average, the estimated technical efficiency scores of "Seolhyang" strawberry farmers in the study area under the technical efficiency of the CRS (TECRS) assumption, technical efficiency of the VRS (TEVRS) assumption, and scale efficiency (SE) assumption were approximately 0.35, 0.53, and 0.60, respectively. The Tobit regression model was used to identify the factors influencing the technical efficiency of "Seolhyang" strawberries. CO2 emissions, heating or not, and the land area negatively affected the technical efficiency, while the organic fertilizer ratio positively affected the technical efficiency. The effects of strawberry planting experience on the technical efficiency were not statistically significant. Therefore, agricultural policies should include measures to reducing the use of pesticides and fuels that emit high emissions and improve the use of organic fertilizers for sustainable strawberry development.

Study on the effect of minimum purchase price policy on China’s wheat production

Yu-Cong Sun(손우총),Shuang-Yu Hu(호쌍우),Li Yang(양리),Sung-Chan Kim(김성찬),Jong-In Lee(이종인) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.2

Study on the influencing factors of wheat import trade in China

Yu-Cong Sun(손우총),Shuang-Yu Hu(호쌍우),Zhi-Run Li(이지윤),Ji-Yeon Shim(심지연),Jong-In Lee(이종인) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.2

Effects of E-commerce Terminal Logistics Service Quality on Rural Residents' Online Purchasing Behavior — Case study: Jilin Province in China

Yu-cong Sun,Shi-yong Piao,Jin-tao Chen,Bobah Brillant Sisang,Jong-in Lee 한국국제농업개발학회 2021 韓國國際農業開發學會誌 Vol.33 No.4

농촌 종점 물류는 농촌 주민들의 온라인 쇼핑에 영향을 주는 중요한 요인임. 농촌 인터넷 쇼핑의 서비스 품질은 양호한 종점 물류 배송과 지원이 필요함. 농촌 이커머스의 발전에 의 하여 농촌 주민들이 서비스의 품질에 대한 기대치도 높아지고 있음. 본 연구에서는 이커머스 만족도를 통한 농촌 종점 물류 서비스 품질이 농촌 주민의 온라인 구매행위에 어떠한 영향 미치는지 검토하고, 농촌 종점 물류 서비스의 발전을 위한 개 선 및 발전전략을 제시하였음. 본 연구에서는 구조방정식모델 (SEM)과 온충린의 매개효과 테스트를 적용하여 분석하였음. 1. 신뢰성과 서비스 편의성은 만족도에 긍정적 영향을 미치며, 원가절약은 만족도에 부정적 영향을 미침. 2. 만족도는 인터넷 쇼핑에 긍정적인 영향을 미치는 것으로 나타났음. 3. 만족도는 반응성과 구매행위 사이에 매개효과가 있고 경제와 구매행위 사이에도 매개효과가 있는 것으로 나타났음. Rural terminal logistics are important determinants of the rural residents' online shopping. The service quality of rural online shopping needs good terminal logistics distribution and support chain. As e-commerce expands to rural areas, residents are gradually increasing their expectations on service quality. Taking satisfaction as an intermediary variable, this study explored influences of various dimensions of rural terminal logistics service quality on rural residents' online purchasing behavior, and provided corresponding improvements and development countermeasures for the development of rural terminal logistics service that would improve the quality of life of rural residents. The structural equation models (SEM) and Zhong Lin Wen’s method of mediating effect test were in the analysis (Wen et al., 2004). Distribution reliability and service convenience had positive effects on satisfaction, while economy had a negative effect on satisfaction. Meanwhile, satisfaction had a positive effect on online purchasing behavior, while satisfaction had a mediator effect between responsiveness and purchase behavior, and a mediator effect was also observed between Economy and purchase behavior.

Analysis on the change of total factor productivity of wheat in China and its influencing factors

Yu-Cong Sun,Shuang-Yu Hu,Sung-Chan Kim,Zhi-Run Li,Jong-In Lee 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.9

밀은 중국의 3대 식량작물의 하나로서 생산량은 사회생활과 산업발전에 중요한 역할을 한다. 본 연구에서 중국 12개 밀 주요 생산지역을 대상으로 중국의 농산물 비용 및 수익의 데이터를 통하여 2005년부터 2019년까지 DEA-Malmquist 모델을 이용하여 밀의 총요소 생산성을 측정하였으며, 또한 중국 통계연감, 교통 연감, 중국 농촌 통계 연감의 데이터를 기반으로 LSDVC 모형을 이용하여 효율성은 영향요인을 측정하였다. 분석결과, 2005년부터 2019년까지 중국 19년간 밀의 총요소 생산성은 내림세를 보였고 연평균 증가율은 –1.5%였다. 밀의 생산 효율성 영향요인을 보면, 농업의 기계화동력은 밀의 총요소생산성에 뚜렷한 긍정적(+)인 영향을 주지만 정부의 농업 공공지출, 산업화는 밀의 총요소생산성에 뚜렷한 부정적(-)인 영향을 준다. 또한 농촌의 도로밀도와 평균 기온과 도시화는 밀의 생산성 요소의 영향이 뚜렷하지 않다. 밀 생산력의 지속적인 향상을 위해 앞으로 밀 산업의 발전은 농업 발전방식을 중점적으로 전환하고 인력 투입을 확대하며 공업 부문의 농업 육성을 장려해야 한다. As one of the three major food crops in China, wheat production plays a vital role in people’s lives and industrial development. This study used a DEA-Malmquist model to calculate and analyze the wheat total factor productivity (TFP) of 12 major wheat-producing provinces from 2005 to 2019. The data necessary for this calculation were obtained from the “National Farm Product Cost-benefit Survey”. Further to this calculation, an LSDVC model was used to explore the factors influencing the TFP. For this, the data were obtained from the “China Statistical Yearbook”, “Rural Statistical Yearbook of China”, and “Transport Yearbook”. The results showed that from 2005 to 2019, China’s wheat total factor productivity showed a decline and increased at an average annual rate of -1.5%. As far as the factors influencing the wheat production efficiency are concerned, the total mechanical power has a significant positive impact on the TFP of wheat. In contrast, government expenditures for agriculture, forestry and water resources, and industrialization have significantly adverse effects on the wheat TFP. Moreover , the rural road density and urbanization showed no significant impact on the TFP of wheat. Therefore, to promote the sustainable improvement of wheat productivity, the future development of the wheat industry should focus on the transformation of the agricultural development mode, human resources investment, and encourage the industry sector to nurture agriculture.

Schisantherin A Improves Learning and Memory of Mice with D-Galactose-Induced Learning and Memory Impairment Through Its Antioxidation and Regulation of p19/p53/p21/ Cyclin D1/CDK4/RB Gene Expressions

Cong Liu,Weijing Sun,Ning Li,Jiaqi Gao,Chunyan Yu,Chunmei Wang,Jinghui Sun,Shu Jing,JianGuang Chen,He Li 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7

Schisantherin A (SCA) was evaluated for possible function in restoring the learning and memory impairment induced by D-galactose in mice. ICR mice were treated with D-galactose subcutaneously (220 mg·kg−1), and followed by SCA in different doses (1.25, 2.50 and 5.00 mg·kg−1, administered orally) for 42 days. Effects of SCA on learning and memory were examined by step-through tests and Morris water maze tests. The activity of superoxide dismutase (SOD), the content of malondialdehyde (MDA) in the peripheral blood and hippocampus of mice were assayed by water-soluble tetrazolium-1 (WST-1) and thiobarbituric acid (TBA) methods. The contents of 8 hydroxy deoxy guanosine (8-OHdG) in the hippocampus of mice were detected by immunosorbent assay methods, respectively. Quantitative real-time PCR and Western Blot were respectively used to detect the expression of p19, p53, p21, cyclin D1, CDK4 and RB genes, and the phosphorylation of RB in the hippocampus of mice. We found that SCA significantly improved the learning and memory impairment induced by D-galactose in mice. After SCA treatment, SOD activity was increased and the content of MDA was decreased in both peripheral blood and hippocampus of mice. 8-OHDG content was also decreased in the hippocampus of mice. Furthermore, the expression of p19, p53 and p21 genes was reduced and the expression of cyclin D1 and CDK4 and the phosphorylation of RB protein were elevated in the hippocampus. SCA may improve the learning and memory impairment induced by D-galactose by enhancing the antioxidant capacity, and regulating the expression of p19/p53/p21/cyclinD1/CDK4 genes, and the phosphorylation of RB protein in the hippocampus of mice.

An Empirical Analysis of Production Efficiency of Vegetable Industry in Hebei Province

Shuang-Yu Hu(호쌍우),Sung-Chan Kim(김성찬),Yu-Cong Sun(손우총),Zhi-Run Li(이지윤),Wen Ju(극문),Shi-Yong Piao(박세영),Jong-In Lee(이종인) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.8

중국 허베이성의 채소 산업의 발전은 이미 농민의 소득 증대를 촉진하는 중요한 경로로 되고 있으며 생태환경 오염, 자연 자원 부족 등 문제가 날로 심각해지는 상황에서 채소 산업의 고품질 발전을 실현하기 위해서는 반드시 채소산업의 생산효율을 제고함으로써 실현해야 한다. 농가의 생산성 제고를 위한 효율성 측정이 중요하다. 특히 효율성 계측시 농가의 자본투입, 토지투입 등 현실적 투입 고려가 필요하다. 본 연구는 국내외 연구 성과를 바탕으로 허베이성 2011-2018 채소 생산 투입량, 산출량 데이터, 맴퀴스트 지수와 DEA 모델을 바탕으로 허베이성 산업의 생산 효율성을 연구하였다. 효율성 계측 결과를 이용하여 비효율성의 원인을 규명하고, 농가 효율성 향상을 위한 대안을 제시한다. 분석을 통해 기술 진보 요인이 허베이성의 채소 생산능률의 증가에 영향을 미치는 중요한 원인이라는 것을 발견했다. 연구결과에 따라 본 연구는 채소 생산기술 수준을 제고하는 목적에 기초하여 허베이성 채소 생산의 구체적인 조건과 결합하여 채소 생산기술의 개발과 응용, 기계화 생산, 집약화 경영 발전 등 방면에서 상응하는 대책과 건의를 제기할 것이다. The development of the vegetable industry in Hebei province has become an important way to increase a farmer"s income. Under the background of increasingly serious problems, such as environmental pollution and the shortage of natural resources, it is necessary to improve the production efficiency of the vegetable industry to achieve high-quality development of the vegetable industry. Based on collating research results at home and abroad, this study selected the 2011-2018 vegetable production input and output data of Hebei Province. The production efficiency of Hebei Province"s industry was studied based on the Malmquist index and DEA model. The analysis showed that technological progress is an important factor in improving the vegetable production efficiency in Hebei Province. Based on the research results, the level of vegetable production technology, combined with the specific conditions of vegetable production in Hebei Province, can be improved by developing and applying vegetable production technology, mechanized production, and intensive management development.

Manufacturing Enterprise, Tourism Industry and Economic Development Coupling Coordinative in Jilin Province, China

Shuang-Yu Hu(호쌍우),Yu-Cong Sun(손우총),Zhi-Run Li(이지윤),Jong-In Lee(이종인) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.1

Analysis on the Spatial and Temporal Pattern of China’s Grain Production and Its Influencing Factors

Shuang-Yu Hu(호쌍우),Yu-Cong Sun(손우총),Zhi-Run Li(이지윤),Jong-In Lee(이종인) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.1

Positive Association of TEAD1 With Schizophrenia in a Northeast Chinese Han Population

Yang Sun,Lin Wen,Yi-Yang Luo,Wen-Juan Hu,Hui-Wen Ren,Ye Lv,Cong Zhang,Ping Gao,Li-Na Xuan,Guan-Yu Wang,Cheng-Jie Li,Zhi-Xin Xiang,Zhi-Lin Luan 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.12

Objective Schizophrenia is a complex and devastating psychiatric disorder with a strong genetic background. However, much uncertainty still exists about the role of genetic susceptibility in the pathophysiology of schizophrenia. TEA domain transcription factor 1 (TEAD1) is a transcription factor associated with neurodevelopment and has modulating effects on various nervous system diseases. In the current study, we performed a case–control association study in a Northeast Chinese Han population to explore the characteristics of pathogenic <i>TEAD1</i> polymorphisms and potential association with schizophrenia.Methods We recruited a total of 721 schizophrenia patients and 1,195 healthy controls in this study. The 9 single nucleotide polymorphisms (SNPs) in the gene region of <i>TEAD1</i> were selected and genotyped.Results The genetic association analyses showed that five SNPs (rs12289262, rs6485989, rs4415740, rs7113256, and rs1866709) were significantly different between schizophrenia patients and healthy controls in allele or/and genotype frequencies. After Bonferroni correction, the association of three SNPs (rs4415740, rs7113256, and rs1866709) with schizophrenia were still evident. Haplotype analysis revealed that two strong linkage disequilibrium blocks (rs6485989-rs4415740-rs7113256 and rs16911710-rs12364619-rs1866709) were globally associated with schizophrenia. Four haplotypes (C-C-C and T-T-T, rs6485989-rs4415740-rs7113256; G-T-A and G-T-G, rs16911710-rs12364619-rs1866709) were significantly different between schizophrenia patients and healthy controls.Conclusion The current findings indicated that the human <i>TEAD1</i> gene has a genetic association with schizophrenia in the Chinese Han population and may act as a susceptibility gene for schizophrenia.