• The Journal of Fisheries Business Administration
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• v.32 no.1
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• pp.41-55
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• 2001

본 논문의 목적은 김 양식 있어서 무기산 또는 유기산 사용 문제와 김 양식 어업인들의 생산위험 회피행위를 고찰하기 위한 이론적 틀을 개발하고, 정책함의를 도출하는데 있다. 김 양식의 생산위험 또는 가격위험은 김 양식 어업인들이 직면하고 있는 가장 중요한 의 사길정변수라고 할 수 있으며, 특히 문제가 되고 있는 무기산(또는 폐염산) 또는 유기산은 농업에 있어서 농약처럼 김 양식 어업인들이 생산위험을 최소화하기 위한 일종의 보험 생산요소(insurance production inputs)으로 볼 수 있다. 김 양식 어업인들의 생산위험은 평균(1차 적률 mean), 분산(2차 적률 variance), 왜곡도(3차 적률 skewnesss)에 의해 측정될 수 있으며, 특히 김 양식 어업인들은 확률이 낮을지라도 일단 첫병과 잡태(예: 파래 등)가 광범위하고 심각하게 발생하게 되면 생산물의 심각한 질적 저하가 야기된다는 사실을 경험적으로 인식하고 있다. 따라서 김 양식 어업인들은 평균생산 뿐만 아니라 생산의 분산과 하향성 확률 분포를 최소화할 수 있는 생산기술을 이용하게 된다. 이러한 김 양식 어업인들의 위험회피행위를 분석하기 위해 기대효용이론을 채택하고, 미지의 진효용함수를 테일러 시리즈 확장에 의해 3차 적률까지를 근사치로 이용하였다. 이윤에 대한 기대효용 극대화를 위한 1차 최적조건을 구하면, 어떤 산(무기산 또는 유기산)을 얼마만큼 이용하느냐 하는 문제는 생산량의 분산과 하향성 분포에 대한 김 양식 어업인들의 위험회피계수의 크기와 생산요소의 탄성치에 의해 결정된다. 특히 하향성 위험회피계수가 높고 3차 적률에 대한 생산요소 산의 탄성치가 클 경우 김 양식 어업인들른 하향성 위험을 줄이기 위해 상대적으로 강력하고 가격이 저렴한 산을 더 많이 이용하게 된다. 또한 두 가지 산의 효과가 같다면 무기산/유기산의 시장가격과 정부 산 가격 정책이 김 양식 어업인들의 산 종류 선택과 사용량 결정에 유의한 영향을 미치게 될 것이다. 무기산의 사용이 광범위하고 집약적으로 이루어질 경우 김 양식부문에서 폐공업용 염산 이용에 의한 생산위험 감소는 해양생태환경 파괴위험 증가로 이어질 수 있으며 여기에 바로 정부 산정책의 딜레마가 있다. 따라서 김 양식의 생산성 증대와 환경보전의 균형 유지에 대한 확고한 정책목표가 필요하며, 이러한 정책목표가 흔들릴 경우 산 문제에 대한 정부정책은 생산성 증대와 환경보전 어느 한쪽 부문에 심각한 왜곡현상을 초래할 수 있다.

• KOREAN POULTRY JOURNAL
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• v.50 no.4
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• pp.128-131
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• 2018

창조경제를 지향하는 정부의 농정핵심 목표로 6차 산업화 정책강화와 농림업의 산업 부흥을 추구하면서 농가에서도 새로운 방식의 혁신이 필요해지고 있다. 6차 산업이란 1차 산업의 농림수산업, 2차 산업의 제조 가공업, 3차 산업의 서비스업을 복합한 산업으로, 농산물을 생산만 하던 농가가 고부가가치 상품을 가공하고 향토 자원을 이용해 서비스업으로 확대해 높은 부가가치를 발생시키는 산업을 말한다. 이에 본지는 생산, 판매, 유통까지 6차 산업을 실현화하고 있는 푸른농장을 찾았다.

• International Commerce and Information Review
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• v.18 no.4
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• pp.285-310
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• 2016

The purpose of this study empirically verified impact of strategic and operational integration between first-tier supplier and their supplier and strategic and operational integration between first-tier supplier and their buyer on operation performance. In order to achieve our goal, we tested reliability, validity and path coefficient using structural equation modeling-partial least square (SEM-PLS) over 284 first-tier manufacturing suppliers data that Korea Productivity Center (KPC) surveyed in 2013. This study results indicated that operational integration between first-tier supplier and their supplier or buyer has positive impact on production process flexibility. Meanwhile, strategic integration between first-tier supplier and buyer has positive impact on production flexibility. On the other hand, strategic integration between first-tier supplier and supplier has negative impact on production flexibility. And production process flexibility has positive impact on production flexibility. By empirically testing to departmentalize level and scope of supply chain integration, this study has academic and managerial implications from first-tier perspective on.

• Journal of The Korean Society of Grassland and Forage Science
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• v.10 no.1
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• pp.15-20
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• 1990

This experiment was carried out to investigate the effects of the fist harvesting times (vegetative, stem elongation and heading stage) and regrowth periods (20, 30 and 40 days) after the first harvest on dry matter (DM) productivity, crude protein (CP), CP yield and cell wall constituents of gasses during 1987 and 1988. Although the dry matter productivity of grasses at the first was decreased with earlier cutting, the regrowth DM productivity after the first harvest was increased significantly with earlier cutting (p < 0.05). Also the 30 days of regrowth periods was contributed greatly to the DM productivity p <0.05). The percentage of leaf in the leaf: stem ratio was increased with earlier initial harvest and shorter regrowth period after first harvest. The nutritive value of grasses was increased with earlier initial harvest and the 30 days of regrowth period after fist harvest. Based on the results, it is suggested that good grass DM productivity and nutritive value could be achieved by the earlier harvest at first and the regrowth period of 30 days after first harvest in spring.

• KSBB Journal
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• v.23 no.2
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• pp.131-134
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• 2008

Tea seed extract, a byproduct of tea processing, contains two kaempferol glycosides, camelliaside A and camelliaside B. Kaempferol was produced by enzymatic hydrolysis of glycosides. Optimum reaction conditions were investigated. $Pectinex^{(R)}100L$ was effective, producing kaempferol in 48 hrs. Optimum temperature and pH were $40^{\circ}C$ and 4, respectively. Ratio of substrate and enzyme affected the yield. Under optimum conditions, 1.6g kaempferol per 1 kg tea seed extract was produced and 80% of kaempferol precipitated. This result shows that kaempferol could be produced mildly and effectively using tea-processing byproduct.

• Korean Journal of Ecology and Environment
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• v.37 no.1 s.106
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• pp.57-63
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• 2004

Primary productivity of phytoplankton was measured by $^{14}C$ method from January to October of 1996 in Seonakdong River. This river was a highly productive freshwater showing the euphotic depth of 1.4 m in August and 2.1 m in the remaining season. Chlorophyll-a concentrations of phytoplankton ranged from 67 ${\mu}g\;L^{-1}$ to 894 ${\mu}g\;L^{-1}$ and showed the great increase in August. Maximum specific productivity was 2.1 ${\sim}$4.3 mg C mg $chl-a{-1}\;hr^{-1}$ and occurred above 0.4m depth. In photosynthesis-irradiance relation, photoinhibition or photosynthetic suppression of phytoplankton occurred clearly in the cold seasons, while phytoplankton (mainly Microcystis aeruginosa and its relatives) in August did not show any symptom of the photosynthetic inhibition against the high irradiance. The specific productivity of phytoplankton was eventually dependant upon incident irradiance to show the linear correlation with received irradiance infield, and the areal productivity of phytoplankton upon chlorophyll-a standing crops. In the downstream of the Nakdong River, phytoplankton productions have linearly increased since the estuarine barrage construction to reflect the gradual eutrophication in the estuarine area. Average chlorophyll-a increase of 10 ${\mu}g\;chl-a\;L{-1}$ absolutely corresponded to the primary production acceleration of 30 mg C $m^{-2}\;day^{-1}$ on the annual basis.

• KOREAN POULTRY JOURNAL
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• v.48 no.12
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• pp.114-117
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• 2016

1차 산업인 농업은 가장 핵심적이고 중요한 산업중의 하나이다. 젊은이들에게 1차 산업의 중요성을 인식시키고 새로운 패러다임을 제시하는 이가 있다. '멀리 있지 않은 인문 경영법'의 책을 내고 이를 통해 1차 산업의 희망을 새롭게 계몽함은 물론, 올해 제40회 국가생산성 대회에서 강소기업으로 뛰어난 생산성을 보여줘 '산업통산부장관상'을 수상한 인유섬 농업회사법인(주)보금(이하 보금) 대표를 만나 인터뷰한 내용을 정리하였다.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.13 no.1
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• pp.18-24
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• 2004

• Journal of The Korean Society of Grassland and Forage Science
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• v.39 no.1
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• pp.45-52
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• 2019

This experiment was carried out to study the change of productivity and feed value in different types of hilly pasture. The pasture utilized in the experiment was placed on the experimental farm of Pyeongchang Campus of Seoul National University. Forage production type(FP; Orchardgrass 18 + Tall Fescue 12 + Timothy 5 + White clover 5 kg/ha) and Public farm type(PF: Orchardgrass 12 + Tall Fescue 18 + Timothy 5 + White clover 5 kg/ha) pasture were established in September 3, 2014 and utilized (cutting or grazing) four times every year. Growth characteristics, yield and forage quality were investigated for two years. Plant height of grasses was the highest in the $1^{st}$ cutting and legumes was in the $2^{nd}$ cutting. Dry matter (DM) content was highest at every the $1^{st}$ cut grasses significantly lower at the $2^{nd}$ harvest (p<0.05). However, there was no significant difference in the $2^{nd}$, $3^{rd}$ and $4^{th}$ harvest in 2016. In the botanical composition change, the portion of legume was gradually increased after pasture establishment and the ratio of weed and bare land was higher at $2^{nd}$ and $3^{rd}$ cutting, but it was decreased at $4^{th}$ harvest. There was no significant difference in 2016 of fresh yield between two farm types (p>0.05). The yield of dry matter showed similar trend of fresh yield and forage production type was higher than that of public farm type (p<0.05). The forage intake by livestock was 1,452 kg/ha in 2015 and 1,743 kg/ha in 2016. Pasture utilization ratio of public farm type pasture was highest in the $3^{rd}$ grazing time. Forage quality of pasture in relation to management type had not significant difference, but there was difference in harvest times. Crude protein (CP) was the lowest in the $1^{st}$ harvest and total digestible nutrient (TDN) was highest in the $1^{st}$ harvest and lowest in the $4^{th}$ harvest. Based on the above results, it is found that the establishment of pasture suitable for farm's situation is important for set up of Korean model of hilly pasture. Although the forage production type is superior on forage productivity, it is recommended that the results will be provided as basic data for management of public farm type in the future.

• KSBB Journal
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• v.8 no.5
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• pp.438-445
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• 1993

Raw cow manure was treated by a 4-step integrated system with phase separation anaerobic digestion and algal culture. When the first methane fermentation was performed by the effluent from the acid fermenter with retention time of 4 days, the elrerage blogas production rate was 977m1/1 culture/day Gas productivity compared to conventional single-stage anaerobic digestion increased up to 31.4%. As the 2nd methane fermenter was fed by the effluent from the first methane fermenter with 4 days of retention time, average amount of 428m1/1 culture/day of biogas was produced. The reduction rate of COD in the effluent from the acid fermenter, the 1st and the 2nd methane fermenter were 71.8%, 42.6% and 24.0% respectively. Finally, we examined algal treatment process for the effluent from the 2nd methane fermenter. A semi-continuous culture of Chlorella sp. PSH3 was conducted by feeding the effluent with retention time of 10days. In this process, the production rate of algal biomass and COD reduction rate were averaged 1.8g/1 culture/day(2.8$\times$106 cells/ml) and 73%, respectively. Through the 4-setp treatments, the total chemical oxygen demand was reduced from 51,300ppm to 85ppm. Therefore, the reduction rate of total chemical oxygen demand reached about 99.8%. The results indicate that the integrated system could be applicable for treatment of organic wastes, concurrently producing biogas and algal biomass.