• 농업과학연구
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• 제39권2호
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• pp.307-313
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• 2012

The purpose of this study is to provide basic information on exporter's coordination methods from the attitude of agro-food exporters. The implications are; Firstly, most of exporters believe that the agro-food export raises farmer's competitiveness rather than it does the farmhouse's income increase. Secondly, The stabilization of the farm-gain income by exporting agricultural products are most important in order to reinforce the cohesion between farmers and exporters. Thirdly, the exporters intend to participate in establishing and operating a large-scale producers' organization and marketing company under export polices. So, it is necessary that the government drive to coordinate the exporters and producers.

• 한국축산시설환경학회지
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• 제12권1호
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• pp.13-20
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• 2006

품종과 성 및 체중이 검정돈의 행동특성에 미치는 영향을 분석하기 위하여 공인 종돈능력 검정소에서 검정중인 Duroc, Landrace, Yorkshire 및 Berkshire 등 4개 품종 32두의 행동패턴을 녹화한 자료의 비디오 분석을 실시하였다. 또한 4개 품종 8,477두를 대상으로 돼지의 주요 경제형질인 일당증체량, 90kg 도달일령 및 사료요구율에 영향을 미치는 품종 및 성의 효과를 추정하였다. 검정돈의 품종에 따른 행동특성의 차이는 Berkshire 종이 앞으로 엎드린 자세와 앉은 자세로 보낸 시간의 비율이 상대적으로 낮고 걷는 동작, 물을 마시는 동작 및 사료를 먹는 동작으로 보내는 시간의 비율이 다른 품종에 비하여 상대적으로 높게 나타났다. 성에 따라서는 수퇘지가 서있는 자세로 보낸 시간과 사회성 행동으로 보낸 시간 비율이 높게 나타났다. 체중에 따라서는 60kg 이상의 체중에서 30kg 이하의 돼지에 비하여 앞으로 엎드린 자세로 보낸 시간의 비율이 낮았으며, 서있는 시간의 비율이 높게 나타났다. 그러나 그 외의 행동과 동작으로 보낸 시간의 비율은 차이가 없었다. 검정돈의 모든 형질에서 품종 간에 뚜렷한 차이를 나타내었으며, 일당증체량은 Duroc 종이 가장 우수하였고, 90kg 도달일령은 Berkshire 종이 가장 불량하였다. 사료요구율은 Duroc 종이 가장 우수하였고 Yorkshire 종과 Berkshire 종이 불량하였다. 검정돈의 각 형질에 대한 성별에 따른 차이를 보면 일당증체량은 수퇘지가 양호하였고 90kg 도달일령은 차이가 없었으며, 사료 요구율은 수퇘지가 우수하였다. 결론적으로 각각의 행동이나 동작으로 보낸 시간의 비율이 품종과 성 및 체중에 따라 차이가 있음을 알 수 있는데, 이는 품종과 성 및 성장단계에 따라 돼지가 가지는 특유의 행동패턴을 나타낸 것으로 판단된다. 돼지의 품종과 성 및 성장단계에 따라 나타나는 특유의 행동특성과 생산성, 취급, 관리와의 연계에 대한 진전된 연구가 필요한 것으로 사료된다.

• 한국산학기술학회논문지
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• 제20권11호
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• pp.394-401
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• 2019

본 실험은 제한 급여에 따른 비육돈의 성장, 도체특성 및 경제성을 평가하기 위하여 수행하였다. 공시동물은 개시체중이 평균 81.52±1.11 kg인 3원 교잡종(Landrace×Yorkshire×Duroc)의 비육돈 24두를 사용하였으며, 2처리 12반복, 반복당 1두씩 완전임의 배치하여 27일간 진행하였다. 본 실험의 처리구는 무제한 급여(AF, ad libitum feeding)와 제한 급여(RF, restricted feeding)로 나누었으며, 제한 급여에서 증량이 필요한 경우 하루 전날 급여한 양의 10% 수준에서 증량하였다. 사양성적에서 RF의 일일사료섭취량이 AF에 비해 유의적으로 개선되었으나(p<0.001), 일당증체량과 사료효율은 처리구간의 유의적인 차이가 나타나지 않았다. 도체특성에서 도체중과 등지방두께는 AF와 RF간의 유의적인 차이가 나타나지 않았다. 도체등급에 따른 경제성 평가에서 두당 총 지육단가는 AF와 RF간의 유의적인 차이가 나타나지 않았다. 사료비에 따른 경제성 평가에서 RF의 총 사료섭취량과 총 사료섭취비가 유의적으로 낮게 나타났으나(p<0.001), 1 kg 증체 사료비는 AF와 RF간의 유의적인 차이가 없었다. 본 연구결과를 종합해보면 비육기 제한 급여는 무제한 급여에 비해 총 사료섭취량과 총 사료섭취비를 개선시켜 사료비를 저감시킬 수 있음을 시사한다.

• Asian-Australasian Journal of Animal Sciences
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• 제28권9호
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• pp.1345-1353
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• 2015

This study was conducted to investigate the influence of dietary rapeseed meal (RSM) on growth performance, blood profiles, nutrient digestibility and economic benefit of growing-finishing pigs. A total of 120 growing pigs ($[Yorkshire{\times}Landrace]{\times}Duroc$) with an initial body weight (BW) $29.94{\pm}0.06kg$ were used in this experiment. Pigs were randomly allotted into 1 of 5 treatments in a randomized complete block design and 6 replicates with 4 pigs per pen. Treatments were divided by dietary RSM supplementation levels (0%, 3%, 6%, 9%, or 12%) in growing-finishing diets. A linear decrease (p<0.05) of BW and average daily gain (ADG) were observed at 13th wk of finishing and overall periods of pigs. Additionally, gain-to-feed ratio (G/F) tended to decrease by dietary RSM supplementation in growing-finishing diets (linear, p = 0.07 and quadratic, p = 0.08). Concentrations of serum triiodothyronine and thyroxine were not influenced by dietary RSM treatments whereas thyroid gland and liver weight were increased at 13th wk of finishing period (linear, p<0.05; p<0.01) by increasing dietary RSM supplementation level. In blood profiles, serum total cholesterol and low density lipoprotein cholesterol concentrations were not differed by dietary treatments at 13th wk of finishing period whereas concentration of serum high density lipoprotein cholesterol was affected by the supplementation level of RSM, resulting in a linear RSM level responses (p<0.05). Serum blood urea nitrogen concentration tended to decrease (linear, p = 0.07; p = 0.08) at 6th wk of growing and 13th wk of finishing periods and digestibility of dry matter tended to decrease by dietary RSM (linear, p = 0.09). Crude protein, crude fat and nitrogen retention, whereas, were not affected by dietary RSM supplementation level. In the economic analysis, feed cost per weight gain was numerically decreased when RSM was provided up to 9%. Consequently, RSM could be supplemented to growing-finishing diets up to 9% ($3.07{\mu}mol/g\;Gls$) without detrimental effects on growth performance of growing-finishing pigs.

• 한국응용곤충학회지
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• 제50권4호
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• pp.289-293
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• 2011

파정식 초기 파총채벌레의 경제적피해허용수준을 설정하기 위하여 온실에서 파총채벌레 접종기간에 따른 파의 생육, 피해 및 수량을 조사하였다. 파 정식초기에는 파총채벌레 접종기간(즉 가해정도)에 따른 수량감소율은 5일, 10일, 15일, 20일 접종기간에서 각각 17.0%, 53.3%, 38.4%, 80.8%로 증가하였다. 파총채벌레 발생정도와 파 수량감소 관계를 구명하기 위하여 파총채벌레 누적밀도일(Cumulative Insect Days, CID)과 수량 감수량(%) 간 회귀분석을 실시한 결과 비선형식인 logistic 모형에 잘 적용되었다. 이 식으로부터 경험적인 수익한계(Gain Threshold) 5%와 통상적 상품화율(93%)를 감안한 수량 감소율 12% 수준에서 파총채벌레 경제적피해허용수준은 30 CID로 추정되었다. 또한 요방제밀도는 경제적피해수준의 80%가 되는 24 CID로 추정되었다. 본 결과는 더 개선된 모형이 개발될 때까지 파 생육초기 파총채벌레 관리에 유용하게 활용될 수 있을 것으로 판단되었다. 또한 파 노지포장에서 생육후기(정식 후 120일 접종) 파총채벌레 피해가 파 수량에 미치는 영향을 검토한 결과, 파 생육후기에는 낮은 밀도에서 오히려 수량이 증가하였고, 그 후 밀도가 더 증가함에 따라 수량이 감소하는 등 전형적인 보상적 반응(over-compensatory response)을 보였다.

• 기술사
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• 제30권5호
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• pp.82-95
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• 1997

A Study of Improvement in Reactor Thermal Power Measurement Method using Kalman Filter. The objectives of the safety analysis of nuclear power plants are to maintain the surface temperature of fuel and fuel cladding within limit value in case of Loss of Coolant accident (LOCA) so that it ensures the safety and reliability of nuclear power plants. The new technique evaluating the reactor power and improvement of existing plant system increase the safety margin of nuclear power plant operation, and accordingly, economic effect will be anticipated. Hereby, 1 would like to introduce reactor power measurement method using Kalman filter that enables to calculate the reactor power more precisely combining the parameters, for example, turbine output as the 1 st stage pressure of high pressure turbine, and reactor power using energy equilibrium relation. It is expected that the new technique will enhance the accuracy of measurement of reactor power and maintain the reliability of nuclear power operation by increasing operational safety margin, and gain the economic benefit

• 산업경영시스템학회지
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• 제13권21호
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• pp.81-90
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• 1990

In stratified random sampling a simple random sample must be taken in each stratum to reduce the maximum gain in precision given the minimum cost. The purpose of this paper is to deal with the propertics of the estimates and variances and obtain the economic design of stratified random sampling through the optimum allocation of the sample sizes. In addition, the between stratum variation and the within stratum variation is stratifying the population are described.

• Asian-Australasian Journal of Animal Sciences
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• 제14권3호
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• pp.326-332
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• 2001

On a urea-molasses-straw (3:15:82; UMS) based diet effect of graded levels of cottonseed cake (CSC) supplementation on the performance of native (Bos indicus) bulls has been studied for 167 days. Eighteen growing bulls of $129{\pm}13.4kg$ weight and about 14 months old were randomly allocated to three dietary treatments designed in a completely randomized design, having six animals in each treatment. Three dietary treatments were 0, 0.5 and 1.0 kg CSC per head/d. In addition, each animal also received ad lib. UMS, 4 kg Napier (Pennisetum purpureum) grass, 500 g of each of rice and wheat bran and 60 g mineral mix daily. For unit increase in CSC, total DM intake was increased by $1g/kg\;W^{0.75}/d$ but the straw DM intake decreased by $0.54g/kg\;W^{0.75}/d$. Whole gut digestibility of DM and OM was not effected but N and ADF digestibility increased with incremental increase in dietary CSC. For unit (1kg) increase in dietary CSC intake N and ADF digestibility increased by 10 (${\pm}1.155$) and 3 (${\pm}1.732$) unit respectively. Microbial N yield for the 0, 0.5 and 1.0 kg CSC were 5.63, 5.28 and 5.16 g/kg OM apparently fermented in the rumen respectively. For each gram increase in CSC, N intake and N balance increased by 0.626 (${\pm}0.015$) and 0.625 (${\pm}0.0814$) mg/kg $W^{0.75}/d$. High apparent N balance was contrasted with low live weight gain, e.g., for 1 kg increase in CSC supplementation, live weight gain increased by only 0.077 (${\pm}0.00288$) kg/d ($r^{2}=0.99$; p<0.01). The conversion efficiency was 12.98 kg CSC per kg of live weight gain. It was concluded that unless the protein is being protected from the rumen degradation, addition of CSC to UMS diet would have little nutritional or economic advantages.

• East Asian Economic Review
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• 제23권4호
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• pp.381-407
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• 2019

The Korean wave has become a global phenomenon whose effect has been widely studied in Asia, Europe and the US. However the presumption of cultural distance makes it appear unlikely that the Korean wave could gain traction among African consumers of cultural products. As such, a dearth of evidence exists on the effects of the wave in Africa. This paper examines the effect of the wave in East African countries employing both descriptive and Probit model analyses. The results show that, contrary to conventional beliefs, most Africans surveyed perceive value proximity with Korea through the values conveyed in Korean dramas, movies and music. Confucius values, such as filial piety, family love and respect for the elderly are the most appealing to the East African audience. Importantly, contact with Korean wave contents contributes to the respondents' disposition to form favorable attitude towards Korea. The African consumers of Korea's cultural products are equally likely to purchase other Korean commercial products. These results remotely suggest that Hallyu may be a tool for advancing Korea's soft power towards Africa and could generate positive economic externalities.

• 무역상무연구
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• 제76권
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• pp.1-20
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• 2017

The industrial technology (including trade secrets), which is commonly understood as systematic and applied technical knowledge, can be transferred to third parties by contracting for the transfer of technology or by granting of a licence. The activity of industrial espionage, due to the gradual increase of the economic interests of intellectual property, is displaying intensively in order to gain advanced technology information. With our outstanding high technology, but compared to the level of the advanced countries, the technical protection systems, the legal protection measures and the systematic management thereof may still be insufficient. Our industrial technology outflow abroad, due to the vulnerability to the security control system in our country, has been increasing since the 2000. Computer software and SNS, such as smart devices, appear as a rapid change in the technical information environment. In order to minimize the dead zone of a new industrial security, the country's organic activity is being conducted. In 2006, Industrial Technology Outflow Prevention and Protection Law was enacted, which emphasized the responsibilities of the country. In this paper for the economic entity's efforts to prevent technology leakage oversea, I have looked to how the industrial technology can be protected in terms of national security and economic benefits of our enterprises. To solve the above-mentioned problems hereof, Korean government should willingly establish a reliable legal system for supporting to enterprise's operations, and Korean companies should autonomously introduce a synthetic technology protection system and incorporate the confidentiality clauses in an international transfer of technology agreement with third parties.