• The Journal of the Korea Contents Association
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• v.9 no.8
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• pp.99-112
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• 2009

The research is to develop U-IT Technology Transfer Re-auction System Model for technology transfer enable transactions of buyer-oriented. The buyer sends condition technology parts and data informations to provider. The First step, The buyer sends condition technology parts and data informations to provider. The Second step, the buyer's technology and conditions in the First step will be transferred to the DB of a provider who can provide that technology. The Third step, a provider can bid after inputting the conditions. The Fourth step, the buyer decides the ranking of successful bids in condition-optimized auction process. The Fifth step, the buyer invites a provider to be a successful bidder. The last step, if there's no successful bid within the period, the sale considered failed. The buyer-oriented re-auction system is that the deal will become extinct automatically when its sale failed more than two times.

• Korean Journal of Construction Engineering and Management
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• v.23 no.5
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• pp.108-116
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• 2022

Started in 1989 as Public Permanent Rental Housing scheme, public rental housing lease policy is increasing target residents and supply in each government by introducing new supply types. However, public housing business entities have difficulties in expanding the supply due to cumulated deficit. The research suggested long-term public rental housing reconstruction business as a method to preserve the cumulated deficit from the previous. Minimum floor area ratio mathematical model was suggested by defining the floor area ratio of reconstruction business as minimum, since housing sales profit after reconstruction could preserve aggregated deficit, and mathematically approached by considering the traits of long-term public rental housing reconstruction. The determinant for minimum floor area ratio mathematical model comprise cumulated deficit of the existing long-term public rental housing, land size of reconstructed sale housing, housing sales price per unit area, and business cost per unit area. Minimum floor area ratio mathematical model is expected to be the milestone for supporting decision making regarding the economic part of old long-term public lease housings' reconstruction scale, and expanding housing supply within urban area.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.461-461
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• 2011

강수, 수위 및 유량자료 등의 수문자료는 안정된 물 관리 계획, 홍수조절 및 공급계획, 전력공급 등을 위한 댐의 역할을 원활하게 하기위한 운영의사결정을 위한 매우 중요한 기초자료가 된다. 댐 운영을 위한 다양한 기능을 가진 모델을 가지고 있다고 하더라도 매년 변하고 있는 댐 유역의 수문현상에 대한 관측자료를 이용하여 지속적으로 모델을 보정하여 정확성을 확인하고 향상시키는 노력을 기울여야 하므로 수문자료는 댐 운영에 있어서 필수적인 요소일 수밖에 없다. 본 연구에서는 한국수력원자력(주)의 9개 댐 유역에서 기존 활용 가능한 관측소 현황 및 현장조사를 통해 운영상 목적에 맞는 최적의 수위관측망을 설계하여 제시하였다. 설계 방법으로는 댐 유입량 파악과 개략적인 도달시간 파악을 위해 주요 유입지천인 국가하천과 지류 중 지방하천이라도 유역면적이 $150\;km^2$ 이상인 경우에는 유입량 파악을 위한 수위관측소를 두도록 설계하였다. 관측소 밀도는 각 댐 유역의 수문학적 유역 특성인 유역면적, 유입하천의 지형적 특성, 하천크기 등을 고려하여 결정하였다. 설계된 수위관측소들은 현장의 수위관측 및 유량관측에 대한 적정성을 검토하여 댐 저류지 배수영향 등으로 인해 관측이 부적정할 경우 이설을 통해 적정한 위치에서 수문조사가 이루어지도록 제안하였다. 본 연구에서 제안된 한국수력원자력(주) 관할 댐 유역의 수위관측망은 자체 관할 수위관측소 뿐 아니라 자료의 공동 활용이 가능한 국토해양부 등의 관측소까지 포함하고 있다. 따라서 댐 운영 의사결정을 위한 중요한 기초자료로서의 수위 및 유량자료를 경제적이고 효율적으로 제공할 수 있을 것으로 기대된다.

• Environmental and Resource Economics Review
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• v.18 no.4
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• pp.695-713
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• 2009

This study investigates the determinants of municipal water prices and costs in Korea. A panel data set of 164 municipalities for the period 2000~2007 is used for the study. Both random and fixed effect models with an appropriate set of instruments are applied to the data. Substantial differences in prices and costs among municipalities are observed. The study finds that prices and costs increase if the leakage rate is high, the quality of primary water is bad, and the municipality has to purchase primary water from K-water which is the single creation and management corporation of water resources facilities in Korea. Prices and costs decline if the size of consumer is large, the proportion of paying consumer is high, and the amount of subsidy from the central government is large.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.3
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• pp.232-241
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• 2017

This paper presents an automated cow-feeding system based on an AGV and screw conveyor for domestic livestock farms, which are becoming larger and more commercialized. The system includes a hopper module for loading pellet-type mixed feed at the top of the system, a transfer module mounted with a screw conveyor to transfer feed from the hopper module to the outlet module, an outlet module composed of belt conveyors, and an electromagnetic guided driving-type AGV. The weight of the loaded feed is measured by a load cell located under the transfer module. The system reads the feed discharge information stored in RFID tags installed in each cowshed cell, and a predetermined amount of feed is discharged while the AGV is moving. A cow-feed test system was constructed to determine the design parameters of the screw conveyor in the transfer module that determine the feeding capacity. These parameters include the screw's outer diameter, the screw shaft outer diameter, and screw pitch. The parameters were applied to the finalized cow-feed system construction. A DSP-based main controller and cow-feeding algorithm for different scenarios were also developed to control the system. Experimental results confirmed that the system could supply a total of 21 kg of feed uniformly at 420 g/s for a cowshed cell which has 7 cows. The driving distance was 5 m and the speed was 0.1 m/s. Thus, the proposed system could be applied to standardized domestic livestock farms.

• Journal of Internet Computing and Services
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• v.11 no.5
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• pp.105-117
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• 2010

In recent years, dynamic collaboration (DC) among cloud providers (CPs) is becoming an inevitable approach for the widely use of cloud computing and to realize the greatest value of it. In our previous paper, we proposed a combinatorial auction (CA) based cloud market model called CACM that enables a DC platform among different CPs. The CACM model allows any CP to dynamically collaborate with suitable partner CPs to form a group before joining an auction and thus addresses the issue of conflicts minimization that may occur when negotiating among providers. But how to determine optimal group bidding prices, how to obtain the stability condition of the group and how to distribute the winning prices/profits among the group members in the CACM model have not been studied thoroughly. In this paper, we propose to formulate the above problems of cooperative negotiation in the CACM model as a bankruptcy game which is a special type of N-person cooperative game. The stability of the group is analyzed by using the concept of the core and the amount of allocationsto each member of the group is obtained by using Shapley value. Numerical results are presented to demonstrate the behaviors of the proposed approaches.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.5
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• pp.713-719
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• 2018

At present, Busan City has proposed various taxi industry development measures, but fundamentally there is a problem that the taxi supply is excessive compared to the demand. Therefore, this study tried to explore ways to activate the taxi reduction. We first identified problems with the taxi reduction program in Busan, and analyze thoughts of taxi operators and workers. As a result, difficulties in securing funding and lack of consent from a large number of stakeholders were identified as the first problem for current taxi reduction program. Second, both groups recognize the need for the taxi reduction, and taxi drivers are more willing to participate in the program. Third, the most important factor in determining to take the taxi reduction program was the amount of compensation. And to activate taxi reduction program, it is helpful for executives to improve their management conditions and for drivers to place reemployment.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.506-506
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• 2016

수변공간을 개발하는 방향에 있어서 홍수에 안전하고 수자원의 이용기술이 발달하면서 수자원 안전성이 크게 향상되어 수변공간개발은 이용성을 증가시키는 방향으로 진행되고 있다. 대표적인 수변공간 개발인 청계천은 이제 많은 사람들이 방문하고 여가를 즐기고 휴식을 취하는 공간으로 전국적으로 유명한 관광명소가 되었다. 청계천과 같이 유명한 수변공간이 아니더라도 지역의 주거지와 가까운 곳에 하천과 수변공간들이 이미 많은 사람들이 운동, 산책, 휴식, 여가활동을 즐기는 공간으로 인간에게 다가오고 있다. 이러한 수변공간을 개발하는 데 있어 지금까지 개발의 방향을 결정하는 주체는 지자체의 담당공무원과 기술자들에 의해 개발의 방향이 결정되어 왔다. 최근들어 이수와 치수에 있어 안정성이 과거보다 크게 상향되면서 하천은 인간에게 친숙한 공간이 되고 있다. 시대의 흐름이 수변공간의 활용이 높아지고 과거와 달리 홍수방어나 수자원을 공급하는 자연 시설이 아닌 인간이 다양한 목적으로 이용이 가능한 공간으로 변해가고 있다. 이러한 공간을 개발하는데 있어 지형적, 사회문화적 특성을 반영시키고 이용도를 증진시키기 위해 이용자들의 성향을 파악하고 객관적인 지표를 개발할 필요가 있다. 본 연구에서는 대구에 위치한 대표적인 수변공간인 수성못과 신천 그리고 팔거천을 대상으로 이용자들의 설문조사를 실시하고 그 결과를 이용하여 수변공간을 개발하는 데 있어 정량적인 지표들을 제시하고자 한다.

• Journal of Distribution Research
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• v.16 no.5
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• pp.123-140
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• 2011

This study analyzed large distributors' trade features with local suppliers and their direct purchase features through the survey and the interview targeting some MDs(Merchandisers) in large retailers responsible for buying fresh foods (agricultural, fishery, livestock and proceeded products). As the result of conducting the survey targeting the large purchase MDs, it was found that when they select local suppliers, they importantly consider the factors of stable products supply, the quality management, the aggressive management attitude, the affordable (cheap) price, and the suggestion of differentiated goods in order. Concerning their direct purchases in local places, their preference toward the direct-purchase traders were higher than that toward vendors and whole markets as their existing major traders. Among the traders for direct purchase, they preferred farm corporations (including agricultural corporations) the most, and followed the National Agricultural Cooperative, and the unit agricultural cooperative in order. Regarding to the trades with suppliers, when they set the trade price, the merchandisers (MDs) of large distributors preferred long-term trades over 2 years, and utilized the factors of market rate(50.9%), production cost(31.2%) and sale price in the same industry(18.0%). For the local distribution organizations to aggressively counteract the changes of distribution environment in the consumption places, it needs some strategies to organize the agricultural production, to expand the production size and to specialize the distribution channels. And the supply system's continuality and stability are required, so it needs to establish the counteract system enabling to supply all year round through the link of production organizations. Additionally, as an effort to intensify the market negotiation ability, it should collect various market information from the consumption places.

• Journal of Intelligence and Information Systems
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• v.17 no.1
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• pp.37-52
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• 2011

Supply chain management is a strategic thinking which enhances the value of supply chain and adapts more promptly for the changing environment. For the seamless partnership and value creation in supply chains, information and knowledge sharing and proper partner selection criteria must be applied. Thus, the partner selection criteria are critical to maintain product quality and reliability. Each part of a product is supplied by an appropriate supply partner. The criteria for selecting partners are technological capability, quality, price, consistency, etc. In reality, the criteria for partner selection may change according to the characteristics of the components. When the part is a core component, quality factor is the top priority compared to the price. For a standardized component, lower price has a higher priority. Sometimes, unexpected case occurs such as emergency order in which the preference may shift on the top. Thus, SCM partner selection criteria must be determined dynamically according to the characteristics of part and its context. The purpose of this research is to develop an OWL model for the supply chain partnership depending on its context and characteristics of the parts. The uncertainty of variable is tackled through fuzzy logic. The parts with preference of numerical value and context are represented using OWL. Part preference is converted into fuzzy membership function using fuzzy logic. For the ontology reasoning, SWRL (Semantic Web Rule Language) is applied. For the implementation of proposed model, starter motor of an automobile is adopted. After the fuzzy ontology is constructed, the process of selecting preference-based supply partner for each part is presented.