• Journal of the Korea Society of Computer and Information
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• v.14 no.3
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• pp.161-171
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• 2009

In this paper, we propose an automatic method for setting data constraints of a data cleansing service, which is for managing the quality of data exchanged between composite services based on SOA(Service-Oriented Architecture) and enables to minimize human intervention during the process. Because it is impossible to deal with all kinds of real-world data, we focus on business data (i.e. costumer order, order processing) which are frequently used in services such as CRM(Customer Relationship Management) and ERP(Enterprise Resource Planning). We first generate an extended-element vector by extending semantics of data exchanged between composite services and then build a rule-based system for setting data constraints automatically using the decision tree learning algorithm. We applied this rule-based system into the data cleansing service and showed the automation rate over 41% by learning data from multiple registered services in the field of business.

• Applied Biological Chemistry
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• v.13 no.2
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• pp.111-129
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• 1970

As a series of studies on the nucleic acids and their related substances 210 samples were collected from 76 places such as farm soil, compost of heap, nuruk and meju to obtain microbial strains which produce 5'-phosphodiesterase. From these samples total of 758 strains were isolated by the use of dilution pour plate method. For all isolated strains primary screening of the productivity of RNA depolymerase was performed and useful strains with regard to 5'-phosphodiesterase productivities were identified. For these useful strains optimum condition, the effect of various compounds on the activity of 5'-phosphodiesterase, and the optimum condition for enzyme reaction were discussed. The quantitative of 5'-mononucleotides produced by the action of 5'-phosphodiesterase was performed using anion-exchange column chromatography and their identified was done by paper chromatography, thinlayer chromatography, ultra violet spectrophotometry, and characteristic color reaction using carbazole and schiff's reagent. (1) Penicillium citreo-viride PO 2-11 and Streptomyces aureus SOA 4-21 from soil were identified as a potent 5'-phosphodiesterase producing strains. (2) Optimum culture conditions for Penicillium citreo-viride PO 2-11 strain isolated were found to be pH 5.0 and $30^{\circ}C$, and the optimum conditions for enzyme action of 5'-phosphodiesterase were pH 4.2 and $60^{\circ}C$. Best carbon source for the production of 5'-phosphodiesterase was found to be sucrose and ammonium nitrate for nitrogen source. Addition of 0.01% corn steep liquor or yeast extract exhibited 20% increase in the amount of 5'-phosphodiesterase production compared to the control. 5'-phosphodiesterase produced by this strain was activated by $Mg^{++},\;Ca^{++},\;Zn^{++},\;Mn^{++}$ and was inhibited by EDTA, citrate, $Cu^{++},\;CO^{++}$. 5'-phosphodiesterase produced 5'-mononucleotide from RNA at a rate of 65.81%, and among the 5'-mononucleotides accumulated 5'-GMP only was found to have flavorous and the strain was also found lack of 5'-AMP deaminase. Productivity of flavorous 5'-GMP was found to be 186.7mg per gram of RNA. (3) Optimum culture canditions for the isolated Streptomyces aureus SOA 4-21 strain were pH 7.0 and $28^{\circ}C$, and the optimum conditions for the action of 5'-phosphodiesterase were pH 7.3 and $50^{\circ}C$. The best carbon source for 5'-phosphodiesterase production was found to be glucose and that of nitrogen was asparagine. Addition of 0.01% yeast extract exhibited increased productivity of 5'-phosphodiesterase by 40% compared to the non-added control. 5'-phosphodiesterase produced by this strain was activated by $Ca^{++},\;Zn^{++},\;Mn^{++}$ and was inhibited by citrate, EDTA, $Cu^{++}$. It was also found that the strain produce 5'-AMP deaminase in addition to 5'-phosphodiesterase. For this reason although decomposition rate was 63.58% the accumulation of 5'-AMP, 5'-CMP, 5'-GMP and 5'-UMP occurred by the breakdown of RNA. In the course of these reaction 5'-AMP deaminase converted 60% of 5'-AMP thus produced into 5'-IMP and flavorous 5'-mono nucleotide production was significantly increased by this strain over the above mentioned one. Production rates were found to be 171.8mg per grain of RNA for 5'-IMP and 148.2mg per gram of RNA for 5'-GMP, respectively.

• International Journal of Air-Conditioning and Refrigeration
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• v.16 no.3
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• pp.89-99
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• 2008

Indoor ozone has received attention because of its well-documented adverse effects on health. In addition to the inherently harmful effects of ozone, it can also initiate a series of reactions that generate potentially irritating oxidation products, including free radicals, aldehydes, organic acids and secondary organic aerosols (SOA). Especially, ozone reacts actively with terpene. The overarching goal of this work was to better understand ozone and terpene distributions within rooms. Towards this end, the paper has two parts. The first describes the development of a cylindrical test chamber that can be used to obtain the second order rate constant $(k_b)$ for the bi-molecular chemical reaction of ozone and terpene in the air phase. The second consists of model room experiments coupled with Computational Fluid Dynamics (CFD) analysis of the experimental scenarios to obtain ozone and terpene distributions in various turbulent flow fields. The results of CFD predictions were in reasonable agreement with the experimental measurements.

• Journal of Technology Innovation
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• v.9 no.1
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• pp.21-35
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• 2001

The main purpose of this study is to measure and compare the state of the art (SOA) of DNA chips of Korea, Japan and the United States using Gordon's scoring model. From the comparison, Korea's SOAs of DNA chip were estimated to be 70% and 62% of those of the United States in terms of functional and technical parameters, whereas Japan's SOAs were 79% and 77%, respectively. The results of this study could be applied to the strategic technology planning for narrowing the technology gap, and used as one of the key criteria for resource allocation in national R&D programs and the fundamental information to formulate the biotechnology policy for the Korean government.

• ETRI Journal
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• v.27 no.3
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• pp.334-336
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• 2005

We improved the performance of the spectrum-sliced light source for wavelength-division-multiplexed passive optical networks by employing a Fabry-Perot laser diode(FP-LD). We found that the FP-LDs can suppress the intensity noise as significantly as using a gain-saturated semiconductor optical amplifier. The transmission characteristics were measured and analyzed in both conditions with and without employing an FP-LD.

• IEIE Transactions on Smart Processing and Computing
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• v.5 no.1
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• pp.5-9
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• 2016

The modulation bandwidth of a reflective semiconductor optical amplifier (RSOA) is limited by carrier lifetime. Therefore, it is hard to directly modulate an RSOA with high-speed electrical signals. We theorize that an optical filter can act as an optical equalizer, compensating for the narrow bandwidth limitation imposed by the RSOA. By modeling a time-varying RSOA with a modified transfer matrix method (TMM), we simulated 25 Gbps operation of an RSOA with optical filtering effects. We investigated the impact of detuning the center wavelength of the optical filter on the modulation of an RSOA. The numerical results show that it is possible to modulate an RSOA with an optical filtering effect at 25 Gbps without electronic equalization or digital signal processing.

• Annual Conference on Human and Language Technology
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• 1995.10a
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• pp.244-252
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• 1995

본 연구는 한자를 이용하여 시각 정보 (Visual Information)와 음성 정보(Phonological Information)가 단어 재인과 단어 명명 과정에 어떻게 영향을 주는 지를 조사하기 위하여 실시되었다. 기존의 영어를 이용한 연구에서는 시각 정보와 음성 정보를 독립적으로 조작할 수 없었기에 두 요소가 단어 재인에 어떤 영향을 주는 지를 살피는데 어려움이 있었다. 그러나 한자단어를 이용하면 시각 정보와 음성 정보를 독립적으로 조작할 수 있기 때문에 영어 단어를 사용하는 것보다 유리하다. 본 실험에서는 한자 단어를 이용하여 점화 단어 (Prime Word)와 목표 단어(Target Word)간의 시간간격(SOA)을 100 ms, 200 ms, 750 ms, 그리고 2000 ms로 변화시키면서 시간이 흐름에 따라 시각적 유사성과 음성적 유사성에 의한 점화 효과(Priming Effect)가 어떻게 변화하는 지를 조사하였다. 이 실험 결과에 의하면, 100 ms 조건에서는 시각적 유사성에 의한 점화 효과만 있었다. 그러나, 200 ms, 750 ms, 2000 ms 조건들에서는 시각적 유사성뿐만 아니라 음성적 유사성에 의해서도 점화효과가 있었다. 이와 같은 실험 결과는 최초의 한자 단어의 어휘 접근 (Lexical Access)이 시각 정보에 의해 결정됨을 보여주고 있다.

• 한국IT서비스학회:학술대회논문집
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• 2008.11a
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• pp.341-344
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• 2008

일반적으로 알려진 SOA의 장점으로는 개발비용 절감, 기민성, 확장 용이성, 비즈니스 수준의 재사용 등이 있다. 특히 서비스의 재사용은 다양한 시각에서 비추어 지고 있으며, 서비스 재사용 기술 중 일반적이고 많이 사용되는 방법 중 하나가 매시업(Mashup)이다. 그러나, 기존의 서비스나 정보들을 잘 융합하여 사용자가 만족할 수 있는 서비스나 어플리케이션이 모두 개발되는 것은 아니다. 매시업이 되는 과정 중 여러 곳에서 문제점이 발생할 수 있기 때문이다. 따라서 사용자가 만족할 수 있는 고품질의 서비스를 제공하기 위해 본 논문에서는 매시업 방식의 서비스 어플리케이션을 평가하는 품질모델을 제안하여, 이를 기반으로 보다 높은 수준의 매시업 방식의 어플리케이션을 사용자에게 제공할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.245-248
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• 2011

최근 기업들이 SOA, 웹 서비스, 유틸리티 컴퓨팅, 클라우드 컴퓨팅 등과 같은 서비스 지향적인 컴퓨팅 환경에 관심을 가지면서 SLA(Service Level Agreement) 기반의 자동화된 계약관리를 원하고 있다. 일반적으로 SLA는 종이에 자연언어로 표현되어 있어서 SLA 관리나 SLA 기반의 정보처리의 자동화가 제한된다. 이에 본 논문에서는 문서형 SLA를 실행가능한 언어로 표현하는 방법을 제안한다. 그 방법의 핵심은 SLA 문장을 단문, 중문, 또는 복문 형식으로 재구성하고 각 문장을 술어논리로 표현한 뒤, 이를 Prolog 기반 프로그램으로 변환하여 실행가능한 SLA(Active SLA)를 얻는다는 것이다. 이와 함께 ASLA를 활용한 SLA 기반의 계약관리 업무의 자동화에 대한 구체적인 예도 볼 것이다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.446-449
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• 2004

공급망의 전략수립과 설계단계에서는 공급망 전체에 어떠한 기능들이 필요한지를 도출하고, 각 기능들의 효과를 분석할 필요가 있으며, 이런 분석 방법으로 전략적 기회요인 분석(SOA)이 있다. 본 논문에서는 기업의 공급망에서 필요한 기능들을 균형성과지표(BSC)를 이용하여 도출하고, 재고 감소, 매출 신장, 운영비용 감소 등으로 도출된 핵심 성공 요인을 정량적인 성능지표로 나누어서 그 값을 산출하여 효과 분석을 수행한다. 기업의 향후 5년간의 추정 손익계산서 등을 입력 받아 기대효과를 자동으로 산출하고, 그 결과를 웹상에서 수치화된 결과로 보고받을 수 있다. 본 논문에서 제시하는 분석을 통하여 공급망 관리에서의 필수 요소 기능을 도출함으로써 공급망의 전략수립과 설계에 도움을 줄 수 있다.