• Journal of Biosystems Engineering
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• 제33권6호
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• pp.390-395
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• 2008

Current high oil price and the agreement on global climate change prevention have increased worldwide investment and research on renewable energy. In Korea, development of a rapeseed dryer for bio-diesel production has been started in 2007. Usually, rapeseeds are harvested in early summer, because rice cultivation is followed right after rapeseed harvesting. Early harvest and bad summer results in highly moistured rapeseed and development of artificial drying system is required to dry great amount of rapeseed that couldn't be processed by sun drying alone. The rapeseed dryer was modified from an existing circulation type grain dryer. Modification of the dryer was performed with the aid of CFD simulation. Drying test showed that drying rate of rapeseed was 1.51%/h and germination rate reduction was 4.5%p for the drying temperature of $60^{\circ}C$.

• 농촌지도와개발
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• 제23권2호
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• pp.169-180
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• 2016

본 논문은 에티오피아 티그레이의 농촌 마을의 사회적 기구가 소작농의 농업 투자 등 위험에 대한 성향에 미치는 영향을 연구하였다. 연세대학교 빈곤문제연구소는 2014년과 2015년에 에티오피아 북동부에 위치한 티그레이 지역의 두 마을에서 관련 설문자료를 수집하였다. 주요 결론으로서, 지역에서 노동력을 분담하는 기구인 Debo (한국의 품앗이)에 참가하거나 조언 및 도움을 구할 수 있는 조력자가 있을 경우 위험에 적극적인 태도를 보여주었다. 반면, 결혼 및 장례식에 대비하여 보험 역할을 하는 Iddir나 사적금에 해당하는 Equub (한국의 계)에 참여하는 가구의 경우 상대적으로 위험에 적극적인 태도를 보여주지는 않았다. 하나의 정책 제안으로서 빈곤국의 농촌 개발 및 지원시 위험에 적극적인 가구를 선택하여 집중적으로 지원하거나, Debo와 같은 마을내 노동협력 기구를 중심으로 원조 교육 계획을 수립할 필요가 있다.

• 생약학회지
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• 제27권3호
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• pp.207-211
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• 1996

Cumambrin A has been isolated from the dried flowers of Chrysanthemum boreale Makino. The complete $^1H$ and $^{13}C$ NMR assignment of cumambrin A was achieved from two-dimensional $^1H$-$^1H$ COSY and $^{13}C$-$^1H$ COSY spectra with the aid of homonuclear and heteronuclear double resonance experiments. The its structure has been verified by single crystal X-ray diffraction.

• Archives of Pharmacal Research
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• 제21권5호
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• pp.591-594
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• 1998

The structural analogues of cumambrin B(1, 2, 3, 4) were isolated from the flower of Chrysnathemum boreale Makino. The structures of compounds were determined by two-dimensional $^{1}H-^{1}H$ COSY and $^{13}C-^{1}H$ COSY spectra with the aid of homonuclear and heteronuclear double resonance experiment. The stereochemistry of compounds has been verified from single crystal X-ray diffraction of cumambrin A(2). the antimicrobial activities of these guaianolides have been studied.

• 농촌지도와개발
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• 제25권4호
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• pp.211-224
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• 2018

The presence of agricultural and rural society in South Korea has been threatened due to aging as well as depopulation. This study aims to explore the Japanese support scheme for new farmers and the role of local group in new farmers' successful settlement in agricultural and rural society. The case study area is Biratori-cho, Hokkaido, Japan. Firstly, this study identified the systemic support scheme for new farmers of Biratori-cho, which provides with two years' training program, mentoring, rental housing and financial aid. Secondly, we focused on the birth and the supporting role of local group, which is called 'Neo-frontier'. Lastly, we analysed the relationship of new farmers and local residents based on the in-depth interview of 11 new farmers' household. As conclusions, we emphasized the value of quality-based support scheme of local government, unlike the quantity-based policy focused on the number of in-migrants. Also, we discussed the meaning of social network in new farmers' successful settlement in agricultural and rural society.

• ETRI Journal
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• 제45권3호
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• pp.479-491
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• 2023

The automation of agricultural machines is an irreversible trend considering the demand for improved productivity and lack of labor in handling agricultural tasks. Unstructured working environments and weather often inhibit a seemingly simple task from being fully autonomously performed. In this context, we propose a remote driving system (RDS) to aid agricultural machines designed to operate autonomously. Particularly, we modify a commercial speed sprayer for orchard environments into a robotic speed sprayer to evaluate the proposed RDS's usability and test three sensor configurations in terms of human performance. Furthermore, we propose a confidence error ellipsebased task performance measure to evaluate human performance. In addition, we present field experimental results describing how the sensor configurations affect human performance. We find that a combination of a semiautonomous line tracking device and a wide-angle camera is the most effective for spraying. Finally, we discuss how to improve the proposed RDS in terms of usability and obtain a more accurate measure of human performance.

• 한국경제지리학회지
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• 제22권4호
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• pp.405-421
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• 2019

북한의 핵·미사일 개발과 이에 대응한 국제사회의 강도 높은 경제제재가 실행되면서 대북 인도적 지원은 2010년대 매우 낮은 수준에 머물고 있다. 본고는 대북지원의 향후 방향을 모색하기 위해 국제사회가 그동안 진행해 온 인도적 원조의 추이와 성과, 문제점을 살펴보고, 대북지원 개선방안을 제시하고자 한다. 북핵문제가 악화되면서 원조를 정치적으로 도구화하는 경향이 심화되었다. 또한 모금실적 부진으로 국제기구와 단체들의 지원활동이 구호형 사업으로 명맥을 겨우 유지하면서 원조의 질적 수준과 개발협력 효과성이 매우 낮은 실정이다. 대북지원의 현격한 감소 원인으로 경제제재 자체 효과와 함께 원조 장기화에 따른 공여국과 단체들의 피로감 증대, 북한당국의 외부 지원활동에 대한 과도한 제약 등이 작용하고 있다. 본 연구는 국제기구 보고서와 유엔통계 분석을 통해 2010년대 국제사회의 대북지원 동향에서 드러나는 특징의 하나로 농업분야 지원의 비중은 낮아지고 보건·의료 분야가 확대된 것을 밝혔다. 인도주의적 원조는 빈곤 완화와 취약계층을 보호하기 위한 국제사회의 보편적 가치 실현이 강조된다. UN 안보리 대북제재 결의안에서도 경제제재가 일반주민들에 대한 부정적 영향 초래 및 원조단체의 구호활동을 제한할 의도가 없음을 명확히 하고 있다. 따라서 고강도의 경제제재로 인해 실질적으로 크게 제약 받고 있는 대북 인도지원 활동에 대한 확대조치가 진행되어야 하며, 나아가 국제개발협력의 플랫폼이 되고 있는 지속가능개발목표(SDGs)와 연계된 원조 실행이 필요하다.

• Asian-Australasian Journal of Animal Sciences
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• 제27권5호
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• pp.706-716
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• 2014

A new strategy of co-inoculating Bacillus subtilis MA139 with Streptococcus thermophilus and Saccharomyces cerevisiae was used to produce fermented soybean meal (FSBM). Three experiments were conducted to determine the concentration of digestible energy (DE) and metabolizable energy (ME) (Exp. 1), apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of amino acids (AA) (Exp. 2), and feeding value (Exp. 3) of FSBM produced by this new strategy (NFSB) compared with soybean meal (SBM) and conventionally available FSBM (Suprotein). In Exp. 1, twenty-four barrows (initial body weight [BW] of $32.2{\pm}1.7kg$) were randomly allotted to 1 of 4 diets with 6 replicates per diet. A corn basal diet and 3 diets based on a mixture of corn and 1 of 3 soybean products listed above were formulated and the DE and ME contents were determined by the difference method. The results showed that there were no differences in DE and ME between SBM and either FSBM product (p>0.05). In Exp. 2, eight barrows (initial BW of $26.8{\pm}1.5kg$) were fitted with ileal T-cannulaes and used in a replicated $4{\times}4$ Latin square design. Three corn-starch-based diets were formulated using each of the 3 soybean products as the sole source of AA. A nitrogen-free diet was also formulated to measure endogenous losses of AA. The results showed that the SID of all AA except arginine and histidine was similar for NFSB and SBM (p>0.05), but Suprotein had greater (p<0.05) SID of most AA except lysine, aspartate, glycine and proline than NFSB. In Exp. 3, a total of 144 piglets (initial BW of $8.8{\pm}1.2$ kg) were blocked by weight and fed 1 of 4 diets including a control diet with 24% SBM as well as diets containing 6% and 12% NFSB or 12% Suprotein added at the expense of SBM. During d 15 to 28, replacing SBM with 6% NFSB significantly improved average daily gain (ADG) and average daily feed intake (ADFI) (p<0.05) for nursery piglets. During the overall experiment, ADG of piglets fed diets containing 6% NFSB was significantly greater (p<0.05) than that of piglets fed SBM. In conclusion, fermentation with the new strategy did not affect the energy content or the AID and the SID of AA in SBM. However, inclusion of 6% NFSB in diets fed to nursery piglets improved performance after weaning likely as a result of better nutritional status and reduced immunological challenge.

• 농촌지도와개발
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• 제29권4호
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• pp.203-224
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• 2022

This study aims to examine the educational needs of migrant farm workers and farmers in Korea. For developing survey instruments, content analysis of migrant workers & employer training programs, in-depth interviews with farmers and expert reviews had been conducted. Therefore, eight parts and twenty nine educational contents for migrant workers, five parts and twenty educational contents for farmers have been constructed. For data analysis, Borich analysis and The Locus for Focus Model were hired to analyze the educational needs assessment. Results showed that migrant workers' educational priorities were 'basic korean for farming, working attitude in farming, safety guidelines and first aid skills for rural life, safe use of pesticides and protective equipment, driving skills, safe use of agricultural machinery, operation & maintenance of agricultural machinery, pest control by crop', and for the farmers' were 'communication with migrant workers, trouble controls with employment, farming guidance, industrial accident cases and countermeasures, preventing disease and promoting mental health of migrant workers'.

• Asian-Australasian Journal of Animal Sciences
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• 제32권3호
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• pp.387-394
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• 2019

Objective: This study was to investigate the nutrient ileal digestibility of dried mealworm (Tenebrio molitor) larvae and compare with those of three animal protein by-products in growing pigs. Methods: A total of 12 crossbred ($[Landrace{\times}Yorkshire]{\times}Duroc$) growing pigs with average body weights of $24.12{\pm}0.68kg$ were surgically equipped with simple T-cannulas after being deprived of feed for 24 h according to published surgical procedures. These pigs had a recovery period of two weeks. A total of 12 pigs were assigned to individual metabolic crates and allotted to one of four treatments with 3 replicates in a fully randomized design. Dietary treatments included the following: i) Fish meal, corn-vegetable by-product basal diet+9.95% fish meal; ii) Meat meal, corn-vegetable by-product basal diet+9.95% meat meal; iii) Poultry meal, cornvegetable by-product basal diet+9.95% poultry meal; iv) Tenebrio molitor, corn-vegetable by-product basal diet+9.95% dried Tenebrio molitor larvae. Results: Results showed that the apparent ileal digestibility (AID) of Lys was higher (p<0.05) in pigs fed Tenebrio molitor diet than that in pigs fed fish meal diet. Pigs fed Tenebrio molitor diet showed increased (p<0.05) AID of His and Arg compared to pigs fed Fish meal or Meat meal diet. The AID of Cys was increased (p<0.05) in pigs fed poultry meal and Tenebrio molitor diets compared to that in pigs fish meal diet. Pigs fed meat meal, poultry meal, and Tenebrio molitor diets showed higher (p<0.05) standardized ileal digestibility (SID) of total energy compared to pigs fed fish meal diet. The SID of Arg was higher (p<0.05) in pigs fed Tenebrio molitor diet than that in pigs fed fish meal or meat meal diet. Furthermore, pigs fed poultry meal or Tenebrio molitor diets showed increased (p<0.05) SID of Cys compared to pigs fed fish meal diet. Conclusion: In conclusion, providing pigs with diets that contained Tenebrio molitor larvae meal improved AID and SID of nutrients as well as essential and non-essential amino acids. The digestibility of dried mealworm larvae protein and its utilization in vivo are also good. Therefore, dried mealworm larvae protein can be used as protein source at 10% level in growing pigs.