• KIEE International Transactions on Power Engineering
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• 제5A권4호
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• pp.311-321
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• 2005

A competitive generating company (GENCO) could maximize its payoff by optimizing its generation assets. This paper considers the GENCO's arbitrage problem using price-based unit commitment (PBUC). The GENCO could consider arbitrage opportunities in purchases from qualifying facilities (QFs) as well as simultaneous trades with spots markets for energy, ancillary services, emission, and fuel. Given forecasted hourly market prices for each market, the GENCO's generating asset arbitrage problem is formulated as a mixed integer program (MIP) and solved by a branch-and-cut algorithm. A GENCO with 54 thermal and 12 combined-cycle units is considered for analyzing the proposed formulation. The proposed case studies illustrate the significance of simultaneous arbitrage by applying PBUC to multi-commodity markets.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.440-445
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• 1994

An application of H$_{\infty}$ synthesis to contact control of a manipulator is suggested. Based on computed torque linearization of a manipulator, a target dynamics for contact motion control is defined and used as a reference model. The target dynamics relates position and force errors through free motion impedance and force error compensators. The H$_{\infty}$ control synthesis is adopted to find an optimum the compensator for position tied force control in various directions of the end-effector. The optimization is performed on the augmented criteria, which trades off the sensitivity function of the errors and the input load at the joints. A design example of the compensator is provided that meets the design specifications.s.

• International Commerce and Information Review
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• 제2권1호
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• pp.69-81
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• 2009

In the past, trades with the Latin American markets were not active since the South Korean companies simply considered them substitute markets whenever exports were slow. However, the importance of these markets is highlighted anew thanks to the signing of the Korea-Chile Free Trade Agreement (FTA). Presently, Latin American nations are pursuing FTA with various nations in the world, regardless of the geographic boundaries, in order to vitalize their economy and attract foreign capital. Despite these efforts to liberalize the market, Latin American regions continue to restrict importation by leveraging diverse set of trade regulation policies. This research examines trade regulation policies in the Latin American regions and proposes Korea's countermeasures.

• 통상정보연구
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• 제11권2호
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• pp.69-81
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• 2009

In the past, trades with the Latin American markets were not active since the South Korean companies simply considered them substitute markets whenever exports were slow. However, the importance of these markets is highlighted anew thanks to the signing of the Korea-Chile Free Trade Agreement (FTA). Presently, Latin American nations are pursuing FTA with various nations in the world, regardless of the geographic boundaries, in order to vitalize their economy and attract foreign capital. Despite these efforts to liberalize the market, Latin American regions continue to restrict importation by leveraging diverse set of trade regulation policies. This research examines trade regulation policies in the Latin American regions and proposes Korea's countermeasures.

• 통상정보연구
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• 제9권4호
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• pp.307-328
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• 2007

This paper discusses some requirement issues of future global e-trade. Korea has been making lots of efforts on e-trade promotions and many research results support that the performance of e-trade should be increased. There are still many unsolved issues as well as future demands in this area. In this paper, we propose some e-trade requirements for next generation and those are e-trade governance, collaboration enhancement among trading participants, the utilization of e-trade documents repository, the expansion of global e-trade network, and e-trade intelligence just to name a few. For each requirement, we propose some research topics as well as practical implications for improving the performance of global e-trades. One can find some useful thoughts for the future research based on the propositions made by this paper.

• 건축역사연구
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• 제25권3호
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• pp.7-22
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• 2016

Of all the annotations of Rites of Zhou for 2,000 years, there is no single line of history of ore contents related to city building in its current perspective. This is because the definitive evidence of the interpretation of related phrases is regarded as top-level guidelines called "辨方正位(Byeonbang-Jeongwi)", and their specific contents have been discussed in '匠人建國(Jangin-Geonguk)'. The phrases of '匠人營國(Jangin-Yeongguk)', considered to be the key buzzword related to city building, must be reconsidered for these reasons. As such, this paper strives to analyze the system of logic formed by consistent interpretation that flowed for 2,000 years from Han to Qing dynasties, and to discover the principles of city building used in Confucian classics.

• 한국의류산업학회지
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• 제7권3호
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• pp.277-282
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• 2005

This study focuses on the imported silver goods from Japan and investigates the backgrounds of importing, trade items, and the amount of the exchange. This study also investigates the effects of the importing silver on Chosun society. A large amount of silver was imported from Japan and the amount of imported silver reached its maximum in Chosun Dynasty. Japan, on the other hand, imported a large quantity of cotton cloth from Chosun Dynasty. Silver was imported mainly because of the sumptuous moods among the royal family and the aristocracy. The moods were spread out to general people who made them wish for the luxurious and expensive chinese goods. To buy the luxurious goods, a lot of silver was imported from Japan. Importing a large quantity of silver fostered the sumptuous moods and also caused the price increase in the Chosun society. The order of the society became worse because of the individual trades of rich merchants who were closely connected to high officials.

• 무역상무연구
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• 제53권
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• pp.75-97
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• 2012

This study primarily concerns the transfer of letter of credit. A transferable credit is a credit that clearly specifies it is 'transferable' and may be made available in whole or in part to second beneficiary by the request of the first beneficiary. the transfer of the credit is available where the seller as a middleman in intermediate trades purchases from domestic and international supplier. The purpose of this study is to examine the transfer of letter of credit in the UCP600. Having recognized the differences, the study analyzes the transfer of letter of credit under the UCP600 in comparison to those under the ISP98. The ISP98, like the UCP600, stipulates for the requirement of transfer, the number of transfer, conditions of transfer, the replacement of the name of first beneficiary.

• 한국가금학회:학술대회논문집
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• 한국가금학회 2001년도 제18차 정기총회 및 학술발표 PROCEEDINGS
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• pp.107-109
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• 2001

WTO 체제하에서 육계경영의 장래가 지극히 불투명하고 우려하는 가운데 금후의 경영확대여부에 대해서는 확대를 계획하고 있는 농가의 비율은 소규모, 중규모가 많았으며 대규모경영은 현상유지를 나타내고 있었다. 투자 계획 중에서 구체적으로는 $\ulcorner$계분 처리시설 확충$\lrcorner$ $\ulcorner$자동화 설비$\lrcorner$ $\ulcorner$완전계사$\lrcorner$ 외에 규모확대를 위한 계사확장 등이 있으며 그 밖에 발전기, 단열시설, 환풍기보강, 온도센서 등 계사 내부시설을 강화하려고 하는 농장이 많았다. 신기술의 도입계획 중에서 열거해보면 자가발효사료 생산이용을 고려 중, 깔짚의 재활용, 생산비 절감 기법도입, 무창계사, 계사의 위생관리기술 등 각 농장의 경영자 자신의 과제를 해결해 보려는 노력이 엿보였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.113-114
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• 2016

This paper proposes a technical requirements analysis of implementation of multi-trade prefabrication. Recently, there has been a rise in the use of prefabrication to minimize on-site work for time reduction to increase productivity. Prefabrication technique is evolved into multi-trade prefabrication combining other trades from single-trade prefabrication. For implementation of new technique, not only itself but complementary techniques have to be prepared. In this paper, MEP corridor rack, a major item of multi-trade prefabrication, was implemented in the test bed and its process was analyzed to find out technical requirements. As a result, comparatively high level of IT technique was required for efficient use of multi-trade prefabrication in design, lifting and construction phase. In design phase, component level of BIM library was needed for manufacturing; and in lifting phase, BIM-based site logistics process was required. Also in construction phase, laser scanning was implemented for gathering shape and geometry of the wall and slab that were attached to multi-trade prefabrication module.