• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 1999년도 제16회 동계학술발표회 논문집
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• pp.123-158
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• 1999

This study examines the differences in the various characteristics of the firms along their growth stage based on the survey data of 2,515 Korean ventures. Venture characteristics include KSFs(Key Success Factors), environment attributes of their product markets, CEO roles, the use of OPR(Other Peoples Resource). Growth stage of the ventures are classified by their dominant management problems: foundation, the market launch of the first proprietary product or service, The Outset of second generation product or service, and the Initial Public Offering (IPO) and stabilization. The results of this study show substantial differences in many aspects among firms at different growth stages. Although common KSFs exist, KSFs are changing as the venture evolves. Differences in KSFs and environmental attributes along growth stage require CEO to do different role in business process. Different kinds and amounts of external resources are needed according to their growth stage. However, almost all of external resources are offered to ventures in later stage. Entrepreneurs need to change their role, as their firms grow, from visioning and strategic role to marketing and production emphasized role. Based on the results, this study suggests a number of new government policies and future research ideas. Other implications and limitations of this study are also noted.

• 스마트미디어저널
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• 제11권2호
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• pp.53-62
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• 2022

산업화 이후 가속화된 지구 온난화 현상으로 인해 기존환경 변화 및 이상기후 발생 빈도가 증가하고 있다. 농업은 기후변화에 매우 민감한 분야의 산업으로 지구 온난화는 작물의 생산량을 감소시키고 재배 지역이 변하는 등의 문제를 발생시킨다. 또한, 환경 변화는 작물의 생육 시기를 불규칙하게 만들어 숙련된 농사꾼들도 작물의 생육단계를 쉽게 추정할 수 없도록 만들어 여러 문제를 발생시킨다. 이에 본 논문에서는 작물의 생육단계를 추정하기 위한 CNN(Convolution Neural Network) 모델을 제안한다. 제안한 모델은 ResNet의 Pooling Layer를 수정한 모델로 ResNet, DenseNet 모델의 생육단계 추정보다 높은 성능 결과를 확인하였다.

• Mycobiology
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• 제38권3호
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• pp.210-214
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• 2010

Selection of fungal strains with high virulence against the developmental stages of Bemisia tabaci was performed using internal transcribed spacer regions. The growth rate of hyphae was measured and bioassay of each developmental stage of B. tabaci was conducted for seven days. All of the fungal strains tested were identified as Lecanicillium spp., with strain 4078 showing the fastest mycelium growth rate (colony diameter, 16.3 $\pm$ 0.9 mm) among the strains. Compared to strain 4075, which showed the slowest growth rate, the growth rate of strain 4078 was increased almost 2-fold after seven days. Strains 4078 and Btab01 were most virulent against the egg and larva stages, respectively. The virulence of fungal strains against the adult stage was high, except for strains 41185 and 3387. Based on the growth rate of mycelium and level of virulence, strains 4078 and Btab01 were selected as the best fungal strains for application to B. tabaci, regardless of developmental stage.

• 한국작물학회지
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• 제43권2호
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• pp.95-100
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• 1998

Seedling establishment of soybean [Glycine mar (L.) Mer-rill] is an important factor for soybean production in the field. The objective of this study was to determine the distribution of chemical composition in the emerging organs during seedling development in soybeans. Three soybean cultivars (Hill, Paldalkong, and Jangyeobkong) were planted at the Research Farm of College of Natural Resources, Korea University, on May 26, June 5, and June 14. Protein, oil, sugar, and starch contents were measured in each organ at each developing stage. Mean dry weight of three soybean cultivars decreased until VE stage and increased after this stage. Protein content of whole seedling did not change significantly during the seedling growth stage, but the amount in cotyledons markedly decreased with each growth stage increment. About 88% of the cotyledon protein was translocated to the other parts of the seedling at the V2 stage. Oil content of cotyledons sharply decreased until the V1 stage. Sugar content of the seedling was not detected at VE stage and starch content of seedlings increased slightly at VE and VC stages. For the changes of each metabolic component, the amount for whole plants decreased until the V1 stage and started to increase after this stage. The results of this study provide evidence for the breakdown of carbohydrates and oil at the initial stage of seedling growth.

• Asian-Australasian Journal of Animal Sciences
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• 제30권2호
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• pp.221-228
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• 2017

Objective: The objective of this experiment was to characterize the mRNA expression profile of type IIb sodium-inorganic phosphate cotransporter (NaPi-IIb) and the biochemical values of serum alkaline phosphatase (AKP), calcium, inorganic phosphorus, tibial ash and minerals of broiler chickens with aging. Methods: A total of 56 one-day-old Arbor Acres male broiler chickens were used. Broiler chickens were weighed and samples were collected weekly from day 1. Results: The result showed that before the growth inflection point, ash, calcium, and phosphorus content in the tibia of broiler chickens increased with growth (before 3 weeks of age), although there were no significant differences in chicks at different ages in the later period of the experiment and weight gain rate was relatively slow at this stage (4 to 6 weeks). NaPi-IIb gene expression in the small intestine in the early growth stage was higher than that in the later growth stage. Expression of calbindin and the vitamin D receptor protein in the intestinal mucosa increased with age in the duodenum and jejunum. Serum AKP activity first increased and subsequently decreased after peaking at 1 week of age, but there was no significant difference after 3 weeks of age. Conclusion: These results show that compared with the early growth stage, the weight-gain rate of broiler chickens in the late growth stage gradually decreased with gradual tibia maturation, along with weaker positive transport of phosphorus in the intestine and reinforced re-absorption of phosphorus in the kidney, which might be the reason that phosphorus requirement in the late growth stage was decreased.

• 생물환경조절학회지
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• 제18권3호
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• pp.208-214
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• 2009

춘추느타리 2호의 최적 환기횟수는 발이유도기 $1/10h^{-1}$, 생육초기 $1/6h^{-1}$, 생육중기와 생육후기 $1/4h^{-1}$에서 자실체의 생육이 양호하였고, 수한느타리 2호는 발이유도기 $1/6h^{-1}$, 생육초기 $1/6h^{-1}$, 생육중기 $1/4h^{-1}$, 생육후기 $1/20h^{-1}$에서 자실체의 생육이 양호하였다. 춘추느타리 2호 및 수한느타리 2호 원기형성기에는 이산화탄소의 농도의 영향이 크게 나타나지 않았지만, 자실체 생육시 1,500ppm 이상일 경우 갓의 끝부분이 위로 말려 올라가는 등 환기장해 현상이 나타났다. 이와 같은 결과로 춘추느타리 2호에 비해 수한느타리 2호의 경우 호흡량이 높아져서 환기요구도가 높았으며, 환기 횟수가 클 경우 생육이 양호하였다.

• 한국연초학회지
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• 제5권2호
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• pp.17-24
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• 1983

Varietal difference of crop stand, growth of each organs and the factors of dry matter Production at different growth stage of three local tobacco varieties (Hyangcho, Youngwolyub and Yonginyub) were investigated in 1979 and 1980. Varietal variation of total standing crops was clear from 45th day after transplanting to end maximum value of photosyntheticinon-photosynthetic organs was Hyangcho: 1.9, Youngwolyub; 1.6, Yonginyub; 2.3. Maximum value of L/S and T/R ratio was clear from 35th day after transplanting to 45th day. RGR, NAR and CGR were in decreasing order of Yonginyub) Youngwolyub)Hyangcho through out growth stage, LAR and SLA were in decreasing from early growth stage to last growth stage, LAI was obtained to maximum value in the large growth state and LAI was increasing order of during the total growth period that it was Hyangcho is 7.6. Youngwolyub is 9.1 and Yonginyub is 8.7, SLA was Hyangcho;$2.088\textrm{cm}^2$/g/leaf, Youngwclyub;$2.173\textrm{cm}^2$/g/leaf and Yonginyub;$2.020\textrm{cm}^2$/g/leaf, respectively.

• 한국초지조사료학회지
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• 제4권2호
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• pp.158-163
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• 1983

種實用 수수와 수단그라스의 交雜種인 Pioneer 988의, 窒素施肥水準에 따른 時期別 生育 및 乾物生産量을 조사하기 위하여 本 硏究를 실시하였다. 窒素肥科는 成分量으로 10a當 15, 25, 35kg을 施用하였으며 幼植物로부터 開花後期까지의 生育期間게 몇가지 特性을 調麥한바 그 結果는 다음과 같이 要約된다. 1. 出現葉數는 生育이 進行됨에 따라 증가했는데 穗孕期까지 급격한 증가를 보였고, 出穗期에는 最終葉인 15葉이 出現했다. 2. 葉面積指數는 生育의 進行에 따라 증가했는데, 특히 穗孕期까지 그 增加가 급격했으며, 室素施肥水準別로는 幼穗分化期까지 15kg 施肥區에서 컷으나 穗孕期 以後에는 35kg 施肥區에서 컷다. 3. 乾物收量은 穗孕期 以前에는 15kg 施肥區에서 많았으나, 穗孕期 以後에는 35kg 施肥區에서 많았다. 4 乾物生産速度는 純同化率 및 平均 葉面積指數와 밀접한 관계가 있었으며 生育後期에는 純同化率의 增加와 더욱 밀접한 관계를 나타냈다.

• 한국산학기술학회논문지
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• 제14권5호
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• pp.2215-2224
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• 2013

본 연구는 충남(천안 아산)지역 중소기업을 대상으로 성장단계별(창업 성장 확장)기업이 필요로 하는 지원정책을 측정하기 위하여 시도 되었다. 분석결과는 다음과 같다. 첫째, 창업단계에서는 자금과 인력, 판로, 기술 그리고 창업 성장 확장단계는 조직 관리를 핵심역할로 인식하였다. 지원정책 관련, 창업단계에서는 자금, 성장단계는 국내마케팅과 인력, 확장단계는 해외마케팅과 연구개발지원을 성장단계별 필요한 지원정책으로 인식하였다. 둘째, 경향방향(방침) 관련, 창업단계는 기존시장진입과 틈새시장진입을 성장단계에서는 시장창출로 인식하였다. 셋째, 핵심인력은 창업단계는 기술과 영업 그리고 경영기획인력, 창업과 확장단계는 마케팅, 확장단계에서는 생산인력을 성장단계별 핵심인력으로 인식하였다. 넷째, 자금은 창업과 성장단계는 기술개발자금, 공장입지확보자금, 인력운영자금, 판로확보자금, 운영자금을 확장단계는 설비투자자금을 성장단계별 필요자금으로 인식하였다. 다섯째, 중점기술 관련, 창업단계는 신제품개발, 기존제품개선, 기존공정개선, 신공정개발, 성장단계는 가공기술, 확장단계에서는 신공정개발을 성장단계별 중점기술로 인식하였다. 여섯째, 판매방식 관련, 창업단계는 대기업납품, 해외시장판매, 공공기관납품, 중소기업납품으로 인식하였다. 일곱째, 창업단계에서는 창업보육지원, 연구개발 지원, 정보교류, 연구개발성과 활용 및 판매지원, 공장설립 입지지원으로 인식하였다. 경영관리와 관련, 성장단계는 교육, 확장단계에서는 시험생산을 지역기관에 요구하는 지원프로그램으로 인식하는 것으로 나타났다.

• 아시안잔디학회지
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• 제13권1호
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• pp.1-20
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• 1999

This study was carried out to investigate the interaction between productivity and light condition and to analyze the material productivity and productive charactaristics under different hours of light in Zoysia japonica. 1. Rate increasement of leaf number and total leaf length was remarkably high at the early growth stage in the control and 9 hour light treatment. The rate gradually decreased as growth proceeded. But 3 hour treatment was very low in the rate from its early growth stage through the whole test period. 2. The increasing rate of leaf area ratio (LAR) in all the experimental plots was remarkably high at the early growth stage after transplanting the grass. The shorter photoperiod resulted remarkable lower increasement of LAR. 3. The rhizome growth rate of the 9 hour photoperiod was high contrast to the 3 hour photoperiod treatment. The increasing rate of node number was also showed similar trend. 4. Chlorophyll content was very high at the 36 days after transplanting and then decreased gradually. Chlorophyll content on 3 hours photoperiod plot severely decreased. The ratio of chlorophyll a to b was decreased significantly at short day treatment. 5. The content of soluble sugar was increased at shorter photoperiod. The highest ratio of sugar content was on August, 28 by HPLC method. Such a result was attributed to accumulation of sugar in spite of low synthesis of ploysacchrides, translocation by low consumption. 6. The increasing rate of standings in all light treatment was high at the early growth stage after transplanting. Short photoperiod treatment by 3hour showed especially low prganic productivity on Zoysia japonica.