• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2004.10a
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• pp.106-107
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• 2004

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.115.2-115.2
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• 2009

• Transactions of the Korean hydrogen and new energy society
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• v.22 no.6
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• pp.934-941
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• 2011

Characteristics of low NOx burner is investigated. Low NOx burner introduced in this paper adopts two staged combustion with plasma burner for the 1st stage combustion. Extensive parametric tests were done to figure out the effect of burner stoichiometry, staged thermal load, electric power for plasma generation. Overall NOx production by burner shows effective reduction by adopting plasma staged burner. and the aspects depends on the fuel stoichiometry of 1st stage burner or operating condition of plasma burner. It is promising to use plasma burner as an alternative tools of low NOx burner technology.

• Bulletin of the Korean Chemical Society
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• v.25 no.12
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• pp.1889-1892
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• 2004

The peroxidase activity of cytochrome c was studied by using a chromogen, 2,2'-azinobis-(2-ethylbenzthiazoline-6-sulfonate) (ABTS). Initial rate of ABTS oxidation formation was linear with respect to the concentration of cytochrome c between 2.5-10 ${\mu}$M and $H_2O_2$ between 0.1-0.5 mM. The optimal pH for the peroxidase activity of cytochrome c was 7.0-8.5. The peroxidase activity retained about 40% of the maximum activity when exposed at 60 $^{\circ}C$. for 10 min. The peroxidase activity showed a typical Michaelis-Menten kinetics for $H_2O_2$ which Km value was 29.6 mM. Radical scavengers inhibited the peroxidase activity of cytochrome c. The peroxidase activity was significantly inhibited by the low concentration of iron chelator, deferoxamine. The results suggested that the peroxidase activity was associated with iron in the heme of cytochrome c.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2005.05a
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• pp.453-457
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• 2005

Existing manufacturing system has consumed too much energy, space and resource in micro parts manufacturing. To improve this, micro factory system is suggested. But it is difficult to get the high reliability in the assembly, production and inspection of the minute parts because the construction of the micro factory has been started just before. In this study, we will build the digital manufacturing simulation on the micro factory's process and verify the production and assembly process using this simulation.

• Journal of Korean Institute of Industrial Engineers
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• v.40 no.2
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• pp.184-194
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• 2014

Numerous studies have been studied to provide an efficient solution for the Nurse Rostering Problem (NRP), most of which have suffered from its complexity arising from incorporating nurse's work shift and ability. The test-bed data for the NRP is released for the public Competition in 2010. This study suggests a new mixed integer programming for Nurse Rostering Problem and develops a hybrid approach, where a hierarchical decomposition and the corresponding optimization are combined. The computation experiment is performed to show that the suggested algorithms may give a better solution in various instances, compared to the one appeared in the literature.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.05a
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• pp.189-194
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• 2004

항로표지용 광파표지는 섬광을 통해 관측자에게 정보를 제공하고 있으므로, 부동광도 값을 기준으로 성능(광달거리)를 산출하면 안 된다. 그러나 실제로 유효광도 값은 측정하기 어려우며, 계산식 또한 명확하지 않다. 본 논문에서는 항로표지용 광파표지의 유효광도에 대한 IALA(국제항로표지협회)와 해양수산부의 권고기준에 대하여 알아보고, 국내 항로표지용 점멸식 소형등명기의 배광 및 유효광도를 배광측정기로 측정하고, 이를 비교 분석하였다.

• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.193-195
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• 2007

This paper proposed a novel current measurement method for two-phase half-bridge inverter using single current sensor. The proposed method measures DC link input current and a phase current simultaneously and reconstructs each phase currents by simple calculation according to voltage vector. The commutation modes of two-phase half-bridge inverter is analized. The current sampling and reconstructing method is also presented. The proposed method is verified through simulation and experimental results on two-phase induction motor drive system.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.889-891
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• 2005

이동 컴퓨팅 환경에서 휴대용 기기의 저전력 설계는 매우 중요한 문제 가운데 하나라고 할 수 있다. 그동안 저전력 설계를 위한 한 방안으로 수행되어야 하는 작업을 전력이 풍부한 일반 개인용 컴퓨터 혹은 서버로 이전하는 방안이 제시되어왔다. 한편, 최근 컴포넌트 기반 시스템이 이동 컴퓨팅 환경에 적합한 환경으로 제시되고 있다. 본 논문에서는 대표적인 컴포넌트 기반 환경인 CORBA에서 전력이 풍부한 원격 컴퓨터에서 전력을 많이 소비하는 컴포넌트를 실행함으로써 전력 소비를 줄이는 방안을 제시한다.

• Development and Reproduction
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• v.23 no.2
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• pp.149-160
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• 2019

This study examined the effects of different photoperiod conditions on olive flounder (Paralichthys olivaceus), a commercially important species in Korea. Daily variations in the expression of mRNA for the growth-related genes arylalkylamine N-acetyltransferase2 (AANAT2), preprosomatostatin1 (PSS1), and growth hormone (GH) were examined under a 12 h light:12 h dark photoperiod. All the genes were expressed at higher level during the dark period. Melatonin injections increased the expression of GH, but did not significantly affect the expression of PSS. Under short-day conditions (10 h:14 h), the fish gained more weight than under long-day conditions (14 h:10 h). A long nighttime induced melatonin secretion and increased the expression of GH mRNA, promoting weight gain in this species. Therefore, we thought that the long day condition in raising olive flounder may be effective in inducing body growth.