• Korean Journal of Poultry Science
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• v.34 no.1
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• pp.53-56
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• 2007

An experiment was conducted to investigate the effect of ME and crude protein (CP) content of diet on the performance and production cost of white semibroiler chickens. Three hundred sixty hatched white semibroiler chickens (Hy-Line $female\;{\times}\;Ross^{(R)}$ male) were assigned to low dietary treatments of different metabolizable energy (ME) value and crude protein (CP) content: T1; ME 3,040 and 3,070 kcal/kg, CP 21.40 and 20.86%, T2; ME 2,950 and 3,000 kcal/kg, CP 20.62 and 19.70%, T3; ME 2,950 and 3,000 kcal/kg, CP 19.90 and 18.70% and T4; ME 2,900 and 2,920 kcal/kg, CP 18.50 and 18.00% for starter diet ($0{\sim}1st$ wk) and power diet ($2{\sim}5th$ wk), respectively There were significant (P<0.01) differences among treatments in weight gain, feed intake and feed conversion ratio. T1 was significantly higher in weight gain and feed intake and love. in feed conversion ratio than other treatments. Production index of T1 (153.42) was far greater than T2 (112.13), T3 (108.40) and T4 (100.95). It was concluded that semibroilers required similar ME and CP to those of regular commercial broilers (highbro).

• Korean Journal of Food Science and Technology
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• v.35 no.6
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• pp.1162-1168
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• 2003

Development of chocolate products to improve the quality and functional properties with Bifidobacterium-fermented isoflavone powder (BFIP) was attempted. Effects of BFIP on sensory value, isoflavone contents, and microbiological characteristics of chocolate products during storage at room temperature $(24{\pm}0.5^{\circ})$ for 90 day were studied. Five different BFIP concentrations of 0, 1, 2, 3, and 4% (w/w) were added and blended into the chocolate products. Results of sensory evaluation showed that the scores for softness and bitter taste decreased as the BFIP contents increased. In sweet and sour taste, the highest score was shown at 1% BFIP treatment. In overall acceptability, 1% treatment was the most favored, followed by 2% treatment. Contents of isoflavone in chocolate products were stably maintained during 90 storage days. The viable cell numbers of Bifidobacterium remained relatively stable until 70 day, followed by a slow decrease thereafter in all treatments.

• Applied Biological Chemistry
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• v.24 no.1
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• pp.15-20
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• 1981

Changes of urease activity in plant leaves following foliar application of urea were investigated with soybean, rye, tomato, radish and cabbage which were actively growing in a field. In this experiment, the procedure of the enzyme assay included incubation of the reaction mixture at $60^{\circ}C$ for 3 hr in order to inactivate heat unstable enzmes which may utilize ammonia produced by urease. The leaves with urea application showed somewhat higher urease specific activities for 2-4 days immediately after the foliar spray as compared with controls. The most difference of the specific activies between urea treatment and control was usually observed 2 days after urea application regardless of the plants. The difference of the specific activities disappeared completely 4 or 5 days following urea treatment. Protein contents in the leaves of soybean and tomato were increased for about 5 days after urea treatment, while no significant difference was found with rye, radish and cabbage. Urea application showed slightly lower ammonia concentration in the leaves which had higher urease activities. These results suggest that foliar spray of urea is very effective when nitrogen supply is required for rapid growth.

• Journal of Animal Science and Technology
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• v.54 no.1
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• pp.15-22
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• 2012

This study was conducted to investigate the effects of grain sources on the ruminal methane production in Hanwoo steers. Six Hanwoo steers (BW = 614.4 ${\pm}$ 8.3 kg) were fed, on a DM basis (TDN 6.91 kg), 10% rice straw and 90% barley or corn based concentrate, respectively, according to Korean Feeding Standards (Hanwoo). Each period lasted 18 days including a 14-day adaptation and a 4-day measuring period. The steers were in the ventilated hood-type respiration chamber system (one cattle per chamber) during each measuring period to measure heat and methane production for 1 day. Nutrient intake and digestibility were not affected by steer fed grain sources. Methane concentration was not affected by steer fed either barley or corn-based concentrate, respectively (0.022% vs. 0.025%). Methane production was greater by steers fed corn than those fed barley (119.3 g/day vs. 139.4 g/day). This result indicated that methane emission factor by maintenance energy requirement for the late fattening Hanwoo fed corn was higher than the steers fed barley (43.6 kg/head/year) vs. corn (50.9 kg/head/year). Methane conversion rate (Ym) was 0.04 Ym and 0.05 Ym for barley and corn, respectively.

• Journal of Aquaculture
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• v.21 no.2
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• pp.82-88
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• 2008

A 12-week feeding trial was conducted to investigate the effects of dietary supplementation of probiotics as a feed additive for juvenile Korean rockfish Sebastes schlegeli. Four experimental diets supplemented with no probiotic(Control), Bacillus polyfermenticus(BP), Bacillus licheniformis(BL) or Bacillus polyfermenticus plus Saccharomyces cerevisiae(BP+SC) at $1.0{\times}10^7$ CFU/kg diet as a dry-mater(DM) basis were prepared by mixing with a basal diet. After 12 weeks of the feeding trial, fish fed BP+SC diet showed significantly higher weight gain(WG), feed efficiency(FE), specific growth rate(SGR) and protein efficiency ratio(PER) than those of fish fed control diet(P<0.05), however there were no significant differences in WG, FE, SGR and PER among fish fed the BP, BL and BP+SC diets. Fish fed BP and BP+SC diets showed significantly higher condition factor(CF) than that of fish fed control and BL diets. Fish fed BP, BL, BP+SC diets showed significantly higher hepatosomatic index(HSI) than that of fish fed control diet, however there was no significant difference in HSI among fish fed BP, BL and BP+SC diets. Fish fed BP+SC diet showed significantly lower serum glucose than that of fish fed control diet, however there was no significant difference in serum glucose among fish fed BP, BL and BP+SC diets. Fish fed BP+SC diet showed significantly higher respiratory burst activity(NBT assay) than that of the fish fed control and BL diets, however there was no significant difference in NBT assay between fish fed BP and BP+SC diets. Fish fed BP and BL diets showed significantly higher lysozyme activity than that of the fish fed control diet, however there was no significant difference in lysozyme activity among fish fed BP, BL and BP+SC diets. Fish fed BP and BP+SC diets showed significantly lower cumulative mortality than that of the fish fed control diet, however there was no significant difference in cumulative mortality among fish fed BP, BL and BP+SC diets after the challenge test. From these results, dietary B. polyfermenticus, B. licheniformis and B. polyfermenticus plus S. cerevisiae supplementation in juvenile Korean rockfish diet could enhance growth performances, non-speicific immunities and a higher resistance against the specific pathogen.

• Korean Journal of Organic Agriculture
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• v.21 no.4
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• pp.555-567
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• 2013

The objective of this study is to analyze the willingness to change into organic blueberry and the activating strategies on domestic products. For the activation of domestic blueberry, it is necessary to get the quality certification, especially organic certificate and develop the technology for increasing production. It is investigated that the smaller product, younger farmer and higher price expected, the higher willingness to change into organic blueberry. The results and finding of this study can be used to build-up the technical and marketing supporting system that reflects the rapid change of customer's preference on blueberry.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.235-236
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• 2016

본 연구에서는 고 성능 마이크로프로세서를 이용한 공기조형물의 관절 구동과 센서의 환경 인식에 능동적으로 대처할 수 있는 시스템을 연구하였다. 객체기반의 공기조형물용 모션제어 시스템은 단일 제어기로의 역할보다 시스템 구성요소로서의 역할이 매우 중요해지므로 시스템 전체의 제어기로 확장시켜 사용하는 방향으로 전환되어야 한다. 본 연구에서는 시스템의 구동과 환경에 능동적으로 대처할 수 있는 객체기반 공기조형물을 연구하였다. 모터제어 방법에 있어 CAN(Controller Area Network) 네트워크를 방식을 통하여 제어를 수행하는 분산제어방식으로 수행하였다. CAN방식은 모션제어 시스템에 도입하여 주 제어기가 하위 제어기에 네트워크를 통하여 명령을 내리며 하위제어기는 주어진 위치 및 속도명령에 대하여 분산적으로 제어를 수행하였다. 따라서 CAN방식을 사용하여 각 제어기의 독립성과 처리속도를 증대시키고 공기조형물의 기능별 확장이 용이하도록 구성하였다. 제어기의 환경은 시스템을 총체적으로 조화롭게 제어할 수 있는 시스템으로의 역할이 중요시되어 이에 맞도록 설계방안을 연구하였다.

• Proceedings of the Korea Association of Information Systems Conference
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• 1997.10a
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• pp.471-487
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• 1997

본 연구는 사용자 특성 중 조직에서 통제 가능한 요인의 사용자의 태도 및 교육· 훈련이 정보시스템이 실행 성과에 미치는 영향을 검증하기 위한 것이다. 이를 위해 본 연구 에서는 최근 신정보시스템으로 전환한 D사의 사용자를 대상으로 설문조사를 실시하여 다음 과 같은 결과를 얻었다. 첫째, 사용자 태도와 교육·훈련은 각각 독립적으로 정보시스템의 실행 성과에 영향을 미치는 것으로 나타났다. 둘째, 사용자 태도와 교육·훈련이 결합한 상 호작용 효과는 시스템 사용도에는 유의적인 효과를 미쳤지만, 사용자 만족도에는 유의적인 효과를 미쳤지만, 사용자 만족도에는 유의적인 효과를 미치지 못한 것으로 나타났다. 이러 한 연구 결과에 비추어 볼 때, 조직에서 정보시스템의 실행 성과를 높이기 위해서는 사용자 태도를 호의적으로 변화시키고, 사용자에 대한 교육·훈련을 많이 시켜야 하며, 특히 사용자 에 대한 교육·훈련은 차별화하여 실시하여야 한다는 것이다.

• Journal of Power System Engineering
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• v.10 no.3
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• pp.67-72
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• 2006

The effect of manufacturing parameters on wear and improve cooling of motorcycle break system was studied using a disk-on-pad type friction tester. Such parameters conditions have an effect on the wear and improve cooling factor such as applied load, sliding speed, frictional time and number of ventilated disk hole. However, it is difficult to know the mutual relation of these factor. In this study, the wear and cooling characteristics using design of experiment containing 4 elements were investigated for an optimal condition for the best motorcycle disk break system employing Taguchi robust experimental design. From this study, the result was shown that vents have an effect on convection area improving more cooling ability and reduced wear of the disk.

• Proceedings of the Korean Society of Crop Science Conference
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• 2005.10b
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• pp.204-205
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• 2005