• 한국인터넷방송통신학회논문지
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• 제8권5호
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• pp.243-249
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• 2008

디지털 정보 처리 기술과 통신 기술 및 방송 기술의 진보로 방통 융합의 시대가 열리고 있으며 산업 분야의 신성장 모델이 되고 있다. 본 논문에서는 방통 융합의 시대에서 이를 성공적으로 전개할 수 있는 요소 기술들을 분석하였으며, 이를 기반으로 창조적이고 능력 있는 전문 인력의 배출을 목표로 하는 대학에서의 인력 양성 알고리즘을 다루었다. 인력 양성 알고리즘에서는 요소 기술을 지원할 수 있는 기본적인 교육 과정과 차세대 인력 양성을 수행하는 대학에서의 이를 이용한 교육 방향 및 흐름도를 다룬다.

• 대한기계학회논문집
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• 제17권7호
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• pp.1700-1709
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• 1993

The stepped specimen which is subjected to step loading is modeled to study the initiation and growth of adiabatic shear band using explicit time integration finite element method. Three different clearance sizes are tested. The material model for the stepped specimen includes effects of strain hardening, strain rate hardening and thermal softening. It is found that the material inside the fully grown adiabatic shear band experiences three phase of deformation, (1) homogeneous deformation phase, (2) initiation/incubation phase, and (3) fast growth phase. The second phase of deformation is initiated after sudden shear stress drop which occurs at the same time regardless of the clearance size. The incubation time prior to fast growth phase increases, as the clearance size of the stepped specimen increases. Whereas, after incubation period, the growth rate of the adiabatic shear band decreases, as the clearance size decreases. It is also found that two adiabatic shear band may develop instead of one for the smaller clearance size.

• Ecology and Resilient Infrastructure
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• 제5권1호
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• pp.11-18
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• 2018

Phosphorous remains as one of the most limiting nutrients to plant growth, second only to nitrogen. Research on use of biochar as a soil amendment for available phosphorus in temperate calcareous soils has limited studies compared with to tropical acidic soils. An incubation experiment to assess phosphorous availability in a biochar amended calcareous soil under inorganic (Fused superphosphate, FSP) and organic fertilizer (bone meal, BM) and respectively, at the dose of 40, 80 and $120mg\;P\;kg^{-1}$ was carried out. Soil was incubated at $25^{\circ}C$ for 70 days. Results show that the rate of increase in available P was proportional to the fertilizer application rate with or without biochar amendment. Biochar did not have a significant effect on soils amended with either fertilizeron the values of available P. However, time had a significant effect (p<0.001) on the amount of available P during the incubation period. Inorganic fertilizer treatments had recorded high amount of available P with time compared to organic fertilizer treatments. Organic fertilizer treatment sample were significantly not different from control and for most of the incubation time biochar acted as a soil conditioner. Further research is required to understand the holistic and long-term effect of biochar.

• 한국동물위생학회지
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• 제37권2호
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• pp.137-141
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• 2014

A captive mute swan (Cygnus olor) in the brooding period was found dead without any specific signs. On necropsy, the entire digestive tract was severely necrotized with loosely adherent pseudomembranes, and Clostridium perfringens (CP) colonies isolated from the intestinal contents were identified as CP type A by polymerase chain reaction. Microscopically, the intestine and the liver were necrotized and intralesional bacterial clusters were observed. In this case, there were no other mortalities, so the condition of a single bird, in particular, stress from incubation effort, could act as the predisposing factor for necrotic enteritis. In this study, we report a unique case of necrotic enteritis associated with incubation in a captive mute swan.

• 한국전기전자재료학회논문지
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• 제16권8호
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• pp.657-662
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• 2003

This paper presents a new fabrication method of selective SiGe epitaxial growth at 650 $^{\circ}C$ on (100) silicon wafer with oxide patterns by reduced pressure chemical vapor deposition. The new method is characterized by a cyclic process, which is composed of two parts: initially, selective SiGe epitaxy layer is grown on exposed bare silicon during a short incubation time by SiH$_4$/GeH$_4$/HCl/H$_2$system and followed etching step is achieved to remove the SiGe nuclei on oxide by HCl/H$_2$system without source gas flow. As a result, we noted that the addition of HCl serves not only to reduce the growth rate on bare Si, but also to suppress the nucleation on SiO$_2$. In addition, we confirmed that the incubation period is regenerated after etching step, so it is possible to grow thick SiGe epitaxial layer sustaining the selectivity. The effect of the addition of HCl and dopants incorporation was investigated.

• Journal of Microbiology and Biotechnology
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• 제22권7호
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• pp.939-946
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• 2012

Antibiotic production with Streptomyces sindenensis MTCC 8122 was optimized under submerged fermentation conditions by artificial neural network (ANN) coupled with genetic algorithm (GA) and Nelder-Mead downhill simplex (NMDS). Feed forward back-propagation ANN was trained to establish the mathematical relationship among the medium components and length of incubation period for achieving maximum antibiotic yield. The optimization strategy involved growing the culture with varying concentrations of various medium components for different incubation periods. Under non-optimized condition, antibiotic production was found to be $95{\mu}g/ml$, which nearly doubled ($176{\mu}g/ml$) with the ANN-GA optimization. ANN-NMDS optimization was found to be more efficacious, and maximum antibiotic production ($197{\mu}g/ml$) was obtained by cultivating the cells with (g/l) fructose 2.7602, $MgSO_4$ 1.2369, $(NH_4)_2PO_4$ 0.2742, DL-threonine 3.069%, and soyabean meal 1.952%, for 9.8531 days of incubation, which was roughly 12% higher than the yield obtained by ANN coupled with GA under the same conditions.

• 한국버섯학회지
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• 제18권4호
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• pp.331-338
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• 2020

민자주방망이버섯의 대량 생산 및 상업적 실용화를 위하여 야생 균주에 비해 재배기간이 짧고 자실체 발생이 잘 이루어지는 신품종을 육성하기 위하여 본 연구를 수행하였다. 민자주방망이버섯 유전자원 18계통을 수집하고 볏짚발효배지를 이용한 상자 재배를 통해 자실체가 발생한 4계통을 교배모본으로 선발하였다. 단포자 교배를 통해 671조합의 교배를 하였으나 'CBMLN-19' 계통과 'CBMLN-30' 계통을 교배한 17조합만이 교배가 이루어졌다. 그 중 균사 생장이 빠르고 밀도가 높은 8계통을 1차 선발하였다. 볏짚발효배지에 유전자원 14계통, 교배계통 8계통을 접종 후 배양기간을 조사한 결과 교배계통 중 6계통은 20일만에 배양이 완료되었으며 유전자원 14계통 중 7계통은 배양이 완료되기 까지 40일 이상이 소요되어 대부분의 교배계통에서 배양기간이 20일 이상 단축되었다. 배양이 완료된 계통은 식양토를 1~2 cm 복토하여 후 배양을 하였고 균사 배양이 완전히 완료되었을 때 균긁기를 한 후 자실체 발생을 유도하였다. 발생 유도 환경은 온도 14℃, 상대습도 95% 이상, CO2농도 1,500~2,000 ppm 이었으며, 야간에 6℃로 온도를 낮추어 하온 충격을 주었다. 그 결과 유전자원 'CBMLN-31', 'CBMLN-44' 2계통, 교배계통 'CBMLN-96', 'CBMLN-103' 2계통 총 4계통에서 자실체가 발생하였다. 접종 후 자실체가 발생되기까지의 기간은 대조구인 유전자원 'CBMLN-31'이 100일로 가장 길었고, 교배계통인'CBMLM-103'이 45일로 가장 짧았다. 자실체 특성 조사 결과 교배계통인 'CBMLN-103'은 개체중이 1.9 g으로 작은 형태를 나타냈으며, 상자 당 유효경수 123개로 4계통 중 발생량이 가장 많았다. 또 다른 교배계통 'CBMLN-96'은 개체중이 5.5 g 으로 'CBMLN-103' 보다 큰 형태를 나타냈으나, 상자 당 유효경수는 30개로 발생량이 적었다. 수량성 조사 결과 대조구인 'CBMLN-31'계통에서 상자 당 수량 783 g으로 가장 높게 나타났고, 교배계통 'CBMLN-96'은 165 g, 'CBMLN-103'은 232 g으로 나타났다. 교배계통 2계통에서 수량성은 대조구 'CBMLN-31'보다 낮았지만 자실체 발생량이 많았으며, 재배기간이 40일~55일 단축되어 이 2계통을 우량계통으로 선발하고자 한다.

• 전기의세계
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• 제30권3호
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• pp.167-171
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• 1981

In this paper, the mathematical model of influenza derived by the state space method induced a new model by using normal distribution curve of incubation period and researched the effect of vaccination. The important results are as follows. (1) A new model represents accurate spread curve. (2) The standard deviation period in Korea is about 1.5 degree. (3) The number of carries of influenza since put in practice to the vaccination 20% is reduced by average 9.8% degree, the period of spread increase 4 days degree. (4) The vaccination at early put in operation was far surperior and the period of spread grow longer more or less. (5) In the first stage of an attack of disease a case increase since reducing. (6) The number of carries at night is reduced by average 5.468% than in the daytime.

• 한국식품영양과학회지
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• 제12권4호
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• pp.336-341
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• 1983

본(本) 연구는 linoleic acid emulsion에 아미노산용액을 첨가했을 경우 이들 아미노산에 항산화효과가 존재하는지를 알아보고 만약 항산화효과가 있다면 산화기간 중 어느 단계에 영향을 미치는지 알아보고자 하였다. Linoleic acid emulsion과 $10^{-2}M$, $10^{-3}M$, $10^{-4}M$의 glutamic acid, phenylalanine, alanine용액을 부피비(比)로 동량(同量) 섞어 시료를 준비하였으며 아미노산 용액 대신 증류수를 넣은 control group과 함께 $60{\pm}1^{\circ}C$에서 incubation 시켰다. Incubation 시킨 sample은 UV visible spectrophotometer에 의해 흡광도를 측정하여 diene conjugation의 정도와 TBA 값을 정하였으며 이 값으로 induction period와 그후의 산화정도를 알아보았다. 그 결과는 다음과 같다. 1) Diene conjugation의 측정결과(測定結果) glutamic acid의 첨가는 induction period를 감소시켜 prooxidant로 작용하며 alanine과 phenylalanine은 induction period를 연장시켜 주므로 항산화효과가 있다고 할 수 있다. 2) Induction period 중 아미노산이 항산화적인 작용을 하는데에는 최적농도(濃度)가 필요하며 alanine과 phenylalanine의 최적농도(濃度)는 각각 $10^{-3}M$과 $10^{-2}M$이었다. 3) Induction period 측정 이후에 TBA값의 측정(測定)결과 glutamic acid, alanine, phenylalanine을 첨가한 group이 control group에 비해 그 값이 낮으므로 induction period 이후의 단계에서 항산화효과(抗酸化效果)가 있음을 알 수 있다. 이때 항산화적(抗酸化的)인 작용(作用)을 하는 최적 농도(濃度)가 glutamic acid의 경우 $10^{-2}M$이었으며 alanine과 phenylalanine의 경우에는 각각 $10^{-3}M$이었다.

• 농업과학연구
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• 제44권4호
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• pp.558-565
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• 2017

This study was conducted to determine the effect of inoculation of microorganism isolated from pig feces on nutrient contents of fermented hulless barley. The microbial flora in feces of a total of four crossbred piglets ($Landrace{\times}Yorkshire{\times}Duroc$) was analyzed by 16s rRNA sequencing. The most abundant strain was then selected for fermentation of hulless barley. Lactobacillus plantarum (L. plantarum) was dominant (64.56%) in intestinal microbial flora in the pig feces. The selected candidate strain showed significantly higher survival rate at pH 7 than at pH 2.5 and 3.0 (p < 0.05). Incubated culture containing the candidate strain showed an increased growth rate with lower pH levels after 7.5 h incubation compared to initial incubation period (p < 0.05). When compared with commercial multiple probiotics which were used as control, the selected strain showed faster growth rate at 5 h post-incubation (p < 0.05). During the fermentation period, neither inoculated nor non-inoculated control hulless barley showed any change in pH value. Crude fat, fiber and ash contents were lower (p < 0.05) in hulless barley inoculated by the selected strain compared to control. However, moisture, energy, NDF and ADF were not affected by the inoculation of strain or fermentation period. Lactic acid was increased and acetic acid was decreased in the hulless barley inoculated with the selected strain during the fermentation period (p < 0.05). Taken together, our results suggest that L. plantarum derived from the pigs could be utilized as a new microorganism for manufacturing fermented feed stuffs.