• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제14권7호
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• pp.738-742
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• 2008

유비쿼터스 컴퓨팅 환경에서 사용자에게 개인화 된 서비스를 제공하기 위해서 사용자 모델은 필수적 요소이다. 기존의 사용자 모델에서는 시스템이 사용자가 원하는 서비스를 자동으로 인지하고 해석하도록 하기 위하여 사용자가 원하는 서비스를 미리 기술한다. 또한, 사용자 모델에 상황 정보가 고려되지 않음으로 인해 상황에 따라 달라지는 사용자의 선호도를 반영할 수 없다. 위와 같은 문제를 해결하기 위하여 본 논문에서는 사용자의 경험을 학습하여 자가 성장 가능한 사용자 모델을 제시하였으며 상황에 따른 사용자 선호 서비스를 추출하여 자동으로 개인화 커뮤니티 서비스를 제공하는 시스템을 제안한다.

• 한국작물학회지
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• 제48권2호
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• pp.81-88
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• 2003

Soybeans [Glycine max (L.) Merr.] are frequently exposed to unfavorable environments during growing seasons and water is the most important factor limiting for the production system. The purpose of this study was to determine the leaf water potential changes by irrigation, and to evaluate the relationships of leaf water potential, growth and yield in soybeans. Three soybean cultivars, Hwangkeumkong, Shinpaldalkong 2, and Pungsannamulkong, were planted in growth chamber and field with irrigated treatments. Leaf water potential of three soybean cultivars was positively correlated with leaf water content during vegetative and reproductive growth stages in growth chamber and field experiments. Leaf water potentials measured for three soybean cultivars under growth chamber were higher than those of under field conditions. Higher leaf water potential with irrigated plots under field was observed compared to conventional plots during reproductive growth stages. Leaf water potentials of three soybean cultivars were continually decreased during reproductive growth stages under field and there was no significant difference among them. Number of leaves, leaf water content, pod dry weight, number of seeds and seed dry weight with irrigated plots were higher than those of conventional plots. The results of this study suggested that leaf water potential could be used as an important growth indicator during the growing season of soybean plants.

• 디지털융복합연구
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• 제12권10호
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• pp.1-20
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• 2014

국내 중소기업 대부분이 요소기술 확보 및 운영 혁신의 어려움에 처해있다. 글로벌 시장진출 역량부족 등으로 인해 성장정체를 겪고 있으며, 이는 경기 침체, 고용불황, 성장동력 상실 등 악순환 반복을 유발하고 있다. 본 연구는 중소 중견기업의 통계 데이터분석과 중견기업의 사례분석을 통하여, 이를 극복하기 위해 기업의 성장단계별 중소기업 기술혁신 변곡점을 확인하고 중소기업이 중견기업으로, 중견기업이 대기업으로 성장하기 위한 성장단계별 기술혁신관점의 핵심성공요인을 제시하고 지속가능성장을 위한 기술전략을 제시하고자 한다.

• 농촌지도와개발
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• 제23권2호
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• pp.145-156
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• 2016

The purpose of this study is to analyze the farms growing domestic kiwi fruit 'Gold' on their management performance and efficiency in order to reduce the risks involved with introducing new kind of crops for growing, and suggest improvements. First, the result of analysis showed that domestic kiwi fruit 'Gold' growers' income were higher than the average growers due to the fruit's high unit price and productivity. Second, the analysis of management efficiency resulted in scale efficiency having greater impact on inefficiency rather than pure technical efficiency. As for the analysis of technical efficiency, the depreciation costs of agricultural facilities had the greatest influence on its inefficiency. Third, inefficient farms put in excessive inputs across the board, while labor costs(self labor cost + hired labor cost) were the largest factor of optimal inputs according to the models of technical efficiency and pure technical efficiency. Fourth, because of greater reliance on mechanical tools from rising labor costs, there's a need for individual farms to avoid buying farming equipments and instead share the equipments of nearby farms and agricultural cooperatives, or start renting agricultural machines from companies.

• 해양환경안전학회지
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• 제14권3호
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• pp.205-210
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• 2008

화석연료 사용으로 인한 환경오염 및 에너지원가 상승이 큰 문제로 대두되고 있는 현재의 상황을 타개하기 위한 하나의 방안으로 신 재생에너지에 대한 관심이 고조되고 있다. 특히 서해안에 위치하고 있는 새만금 지역은 광활한 면적과 서북서풍이라는 큰 장점을 가지고 있어 풍력발전의 적지로 예상된다. 본 연구는 이러한 예상을 뒷받침해 줄 수 있는 풍력자원을 조사한 것으로 군산지역의 평균풍속은 4 m/s 정도이며, 도서지방을 연계하는 해상풍력발전 단지의 최적지로 손색이 없음을 밝혔다. 또한, 풍력자원의 출현밀도를 판별하는 Weibull의 분포함수를 이용하여 계산하고, 형상계수를 매개변수로 하여 풍속밀도계산을 한 결과, 군산지방의 풍속출현을 예상할 수 있었다.

• 한국연초학회지
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• 제29권1호
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• pp.1-7
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• 2007

This study was conducted in order to predict the chemical and physical properties by climatic factors during the growing season of flue-cured tobacco as soon as possible. The data of eight chemical and five physical properties were collected from "Analysis of physical and chemical properties on farm leaf tobacco" conducted at KT&G Central Research Institute from 1987 through 2006. Data of climatic factors from April to July in 10 districts were collected from Korea Meteorological Adminstration. Except for yellowness(b), all probabilities of linear regression equations between the climatic factors(X) and the average contents of twelve grades(whole plant) for chemical and physical properties(Y) were significant($P{\leq}0.05$). The predicable probabilities within ${\pm}20%$ range of difference were 100% in ether extract content, in nicotine content, and in filling value, 90% in total nitrogen content, and 70% in total sugar content. These results suggest that the regression equations may be useful to predict the average content of twelve grades for eight chemical and four physical properties by climatic factors during the growing season of flue-cured tobacco at the beginning of August.

• 한국연초학회지
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• 제29권1호
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• pp.8-13
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• 2007

This study was conducted in order to predict the chemical and physical properties by climatic factors during the growing season of burley tobacco as soon as possible. The data of six chemical and five physical properties were collected from "Analysis of chemical and physical properties on farm leaf tobacco" conducted at KT&G Central Research Institute from 1987 to 2006. Data of climatic factors from April to July in 6 districts were collected from Korea Meteorological Adminstration. Except for total nitrogen, total nitrogen/nicotine and yellowness(b), all probabilities of linear regression equations between the climatic factors(X) and the average contents of twelve grades(whole plant) for chemical and physical properties(Y) were significant($P{\leq}0.05$). The predicable probabilities within ${\pm}20%$ range of difference were 100% in ether extract content, 95% in nicotine content, and 90% in filling value. These results suggest that the regression equations may be useful to predict the average content of twelve grades for four chemical and four physical properties by climatic factors during the growing season of burley tobacco at the beginning of August.

• 한국기후변화학회지
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• 제7권4호
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• pp.493-498
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• 2016

This study was conducted to investigate the effect of environment factors on full bloom stage and fruit width in four peach cultivars. The average temperature in March was the main factor to determine the date of full bloom in 'Kurakatawase'($-0.6871^*$) and 'Changhowon Hwangdo'($-0.5270^*$). The fruit growth curve after 35 days from full bloom was the double sigmoid shape in 'Changhowon Hwangdo' cultivar. Environmental factors affecting fruit width were mean diurnal range(BIO2) and temperature annual range(BIO 7) in 'Kurakatawase', growing degree days(GDD) after 30 days from full bloom and July precipitation in 'Yumyeong', and annual mean temperature(BIO1), BIO7, and July precipitation in 'Kawanakajima Hakuto'. Of these, major environmental factors affecting fruit width in more than two cultivars were BIO7 and July precipitation.

• Asian-Australasian Journal of Animal Sciences
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• 제16권7호
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• pp.1025-1029
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• 2003

The effect studied was that of the feeding of shrimp by-product meal, as a source of eicosapentaenoic and docosahexaenoic acid, on growth performance and fatty acid composition of adipose tissue in growing pigs kept on small holdings in Central Vietnam. Shrimp by-product meal was exchanged with ruminant meal so that the diets contained either 0, 10 or 20% shrimp byproduct meal in the dry matter. The diets were fed on 6 different small-holder farms. The farmers fed a base diet according to their personal choice, but were instructed as to the use of shrimp by-product and ruminant meal. The diets were fed to the pigs from 70 to 126 days of age. There were three animals per treatment group per farm. The diets without and with 20% shrimp by-product meal on average contained 0.01 and 0.14 g docosahexaenoic acid/MJ of metabolisable energy (ME). Due to the higher contents of ash and crude fiber, the shrimp by-product meal containing diets had lower energy densities than the control diets. Eicosapentaenoic acid was not detectable in adipose tissue; the content of docosahexaenoic acid was generally increased after consumption of shrimp by-product meal. In spite of the concurrent high intakes of ash and crude fiber, the feeding of shrimp by-product meal had a general stimulatory effect on growth performance of the growing pigs. The intake of docosahexaenoic acid or its content in adipose tissue was not related with average daily gain. It is suggested that shrimp by-product meal may contain an unknown growth enhancing factor.

• Asian-Australasian Journal of Animal Sciences
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• 제30권1호
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• pp.20-33
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• 2017

Objective: Superstimulatory treatment of one-month-old lambs can achieve synchronous development of numerous growing follicles. However, these growing follicles cannot complete maturation and ovulation. Oocyte maturation and competence are acquired during follicular development, in which granulosa cells play an essential role. Methods: In this study, we applied RNA sequencing to analyze and compare gene expression between prepubertal and adult superstimulated follicle granulosa cells in sheep. Results: There were more than 300 genes that significantly differed in expression. Among these differently expressed genes, many extracellular matrix genes (EGF containing Fibulin Like Extracellular Matrix Protein 1, pentraxin 3, adrenomedullin, and osteopontin) were significantly down-regulated in the superstimulated follicles. Ingenuity pathway and gene ontology analyses revealed that processes of axonal guidance, cell proliferation and DNA replication were expressed at higher levels in the prepubertal follicles. Epidermal growth factor, T-Box protein 2 and beta-estradiol upstream regulator were predicted to be active in prepubertal follicles. By comparison, tumor protein P53 and let-7 were most active in adult follicles. Conclusion: These results may contribute to a better understanding of the mechanisms governing the development of granulosa cells in the growing follicle in prepubertal sheep.