• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.231-234
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• 2002

This paper has studied a management system for RCST of the Satellite Multimedia Internet Service through analysing the architecture and specification of BSAN based on Digital Video Broadcasting System. In this paper, designing and implementing RCST DPM and agent system are shown. The UCD-SNMP framework served as base station for implementation of the agent. And the message protocol between RCST DPM and agent system has been also defined to provide a way for interaction.

• Journal of Animal Science and Technology
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• v.63 no.3
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• pp.671-671
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• 2021

• The KIPS Transactions:PartC
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• v.8C no.5
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• pp.683-692
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• 2001

In this paper, an integrated network management agent has been proposed and implemented to support different network management protocols, SNMP (Simple Network Management Protocol) for Internet and CMIP (Common Management Information Protocol) for OSI networks. We used MOVI (Managed Object View Interface) concept to integrate the different network management systems. We reviewed three models to design the integrated network management agent and then selected a suitable model among them. The logical structure of an agent, the implementation method and the operation of each module have been shown in this paper. The osimis and ucd-snmp network management system have been used as the reference systems for implementing our system. The integrated network management agent can support the internetworking between Internet and OSI networks in the aspect of network management. Using MOVI concept, if a new management system is introduced, internetworking with this can be achieved by adding the new interface on the view interface of managed object.

• Microbiology and Biotechnology Letters
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• v.19 no.3
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• pp.265-271
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• 1991

In order to produce alcohol for the alternative energy from dried powder of Jerusalem artichoke was investigated with Kluyveromyces marxianus UCD(FST)55-82, which was reported to assimilate inulin. The optimal condition for the production of ethanol by K. marxianus was elucidated to be incubation temperature of $30^{\circ}C$, initial pH 5.44, agitation of 100 rpm, 1,000 ml of medium in a 2.5l-vessel, anaerobic state, and inoculation of 2.5%(v/v). Addition of antifoam A concentrate(si1icon polymer) of 0.01% and urea of 0.1% increased the concentration of ethanol effectively. The optimized condition showed ethanol concentration of 6.8%(v/v) in Jerusalem artichoke liquid medium, production yield of 91.91% and productivity of 2.71 g/l/hr during the first day and 0.71g ethanol/l/hr during four days of incubation.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.292-297
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• 2008

유비쿼터스 컴퓨팅 서비스 환경은 사용자와 시스템간의 상호작용성이 매우 중요하며, 이러한 상호작용성을 사용자 중심의 시각에서 평가하기 위한 새로운 평가 기법의 개발이 필요하다. 본 연구는 유비쿼터스 서비스의 특성이 반영된 사용자 중심의 상호작용성 평가 metric 개발을 목표로 한다. 이를 위하여 첫째, 기존의 유비쿼터스 서비스 평가방법론을 검토하여, 유비쿼터스 서비스 평가를 위한 평가 속성을 정의하였으며, 둘째, 대인 서비스 평가기법, 사용성 평가기법, 정신측정학 기반의 평가기법 등의 기존의 서비스 평가방법론의 한계를 극복할 수 있는 사용자중심의 상호작용성 평가 metric 을 개발하였다. 그리고 본 연구에서 제안된 평가 metric 을 u-home 서비스의 평가에 실제로 적용하여 그 유효성을 검증하고 각 지표별 중요도를 구해보았다. 본 연구에서 제안한 상호작용성 평가 metric 은 유비쿼터스 서비스 상호작용성 수준을 평가함으로써 잠재 서비스 사용자들을 분석하고, 제안된 프레임워크의 서비스 개발단계에서의 잠재 서비스 사용자에 대한 요구사항 수렴 및 수준 파악에 유용하게 활용될 수 있다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1216-1216
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• 2015

In this study, the author apply the VLF(Very Low Frequency) tan-delta data that has been measured at each office of the KEPCO 2012 to the Weibull distribution which is the statistical analysis as previous studies for the remaining life prediction through the improvement of the sensitivity and reliability of the degradation state assessment of underground distribution power cables. Also, in this paper, UCD(Used Cable Diagnosis) Matrix proposed by KEPCO was applied to the hierarchy of assessment prioritization. it suggests Aging Index for condition assessment and high reliability of proper economic replacement cycle using the weight according to the assessment prioritization.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.339-342
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• 2008

최근 IT서비스 산업은 복잡한 서비스 시스템 통합과 더불어, 제품과 서비스의 융/복합화를 위한 IT서비스 제조 (manufacturing)산업으로 활발히 확장되고 있다. 이는 제품의 서비스화 (product servicize)와 서비스의 제품화 (service productize) 현상의 가속화로 인해 제품과 서비스의 구분이 모호해 지고 있는 산업변화에 대응하려는 산업의 노력으로 판단된다. 고객 가치 향상을 위해 IT서비스 제조산업에서는 제품과 서비스의 모호한 경계를 극복하고, 서비스중심의 신규 IT서비스를 개발할 수 있는 무형의 프로세스 정립이 요구되었다. 본 연구에서는 서비스 사이언스 측면에서 제공되는 이론들 (NPD, NSD, UCD, Contingency theory)을 검토하여, IT서비스 제조산업의 특성이 반영된 마케팅 지원 process template를 개발하는 데에 목적이 있다. 제안된 template는 목표시장 및 기술환경의 분석과 동시에 IT서비스 제품 분석을 통해 IT서비스 사업 마케팅 기회를 전략적으로 탐색할 수 있는 도구가 될 수 있을 것으로 판단된다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.4
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• pp.28-44
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• 2023

This study investigates aircraft lessor business models by studying cases and interviewing experts to analyze investors and business strategies of aircraft lessor. The results confirm that there is a wide range of investors including institutional investors, financial institutions, insurance companies, corporations, and wealthy individuals for aircraft lessor. Aircraft lessors can be categorized based on its required rate of return (cost of capital) into bank-investing core, institutional investor-investing value-added, and hedge fund-investing opportunistic. Aircraft lessor decides leasing rate by aircraft purchasing price and lessee's credit rating. Core aircraft lessors invest in new aircrafts for new placement or sale-and-leaseback strategy requiring little technical risk in aircraft, value-added lessors invest in middle-aged aircrafts for re-leasing, opportunistic lessors invest in old aircrafts for freighter conversion or part-out strategy requiring high level of expertise. This study provides insights for future Korean aircraft lessor establishment and investment.

• Nuclear Engineering and Technology
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• v.56 no.1
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• pp.42-47
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• 2024

The electrochemical extraction of uranium in ternary low melting LiCl-KCl-CsCl eutectic on inert and reactive electrodes via different electrochemical techniques was investigated. It was established that the electrochemical reduction process of U(III) ions on the inert W electrode was irreversible and proceeded in one stage. On reactive liquid Ga and liquid Cd electrodes the reduction of uranium ions took place with the considerable depolarization with the formation of UGa₂, UGa₃ and UCd₁₁ intermetallic compounds. Thermodynamic characteristics of uranium compounds and alloys were calculated. The conditions for the extraction of uranium from the electrolyte in the form of alloys on both liquid reactive electrodes via potentiostatic electrolysis were found.

• The Korean Journal of Food And Nutrition
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• v.19 no.4
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• pp.392-397
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• 2006

To compare the contents of amino acids in raspberry wine, 5 types of active dry yeast strains (Saccharomyces cerevisiae Montrachet (UCD #522), Saccharomyces bayanus Pasteur Champagne (UCD #595), Saccharomyces cerevisiae Epemay II (CEG), Saccharomyces bayanus Prise do Mousse (PM), Saccharomyces uvarum Latvia W15) were used. In the fermentation experiment two kinds of raspberry wine were used; Rubus coreanus Miquel(RCM), harvested in Gochang, and Rubus crataegifolius Bunge(RCB), harvested in Okcheon. In 5 kinds of RCM raspberry wines, total contents of 17 amino acids were found from $16.77mg/{\ell}$ in the fermented Prise de Mousse, the most amount, to $12.29mg/{\ell}$ in Lalvin W15, the lowest. The content of amino acid in the RCB raspberry wine fermented by Montrachet was approximately 5.5 times higher than that of the RCM raspberry wine; $90.55mg/{\ell}\;to\;16.54mg/{\ell}$. Cystine and isoleucine were detected $2.97mg/{\ell},\;0.34mg/{\ell}$, respectively, in the RCB raspberry wine but not detected in the RCM raspberry wine. The amount of alanine, aspartic acid, and serine in RCB raspberry wine were found approximately 14 to 20 times larger than that of RCM raspberry wine.