• ETRI Journal
• /
• v.44 no.6
• /
• pp.936-944
• /
• 2022

The mobile network allows redundant transmission via disjoint paths to support high-reliability communication (e.g., ultrareliable and low-latency communications [URLLC]). Although redundant transmission can improve communication reliability, it also increases network costs (e.g., traffic and control overhead). In this study, we propose a reliability-guaranteed multipath allocation algorithm (RG-MAA) that allocates appropriate paths by considering the path setup time and dynamicity of the reliability paths. We develop an optimization problem using a constrained Markov decision process (CMDP) to minimize network costs while ensuring the required communication reliability. The evaluation results show that RG-MAA can reduce network costs by up to 30% compared with the scheme that uses all possible paths while ensuring the required communication reliability.

• KDI Journal of Economic Policy
• /
• v.34 no.2
• /
• pp.17-40
• /
• 2012

We study externality costs of capital investment under limited commitment. We solve for the constrained efficient allocation with a limited commitment environment and find positive externality costs of capital investment provided that full-risk-sharing is not feasible. In a decentralized version of limited commitment environment, a one unit increase of capital investment by an agent increases all individuals' autarky values in the economy and generates externality costs in the economy. This externality cost provides a rationale for positive capital taxation even in the absence of government expenditure. In order to internalize this costs, the government use a positive rate of linear capital tax in the decentralized economy.

• Environmental and Resource Economics Review
• /
• v.9 no.3
• /
• pp.545-562
• /
• 2000

Environmental regulation affects real income distribution as well as resource allocation. The consumers' quality of life is sure to be improved by the pollution abatement, but consumers should pay part of the abatement cost through the increased prices of consumption goods they purchase. This paper computes pollution abatement costs that each of 15 income classes in Korea paid indirectly by consuming goods whose prices include the abatement cost in 1993. The distribution of pollution abatement costs among income classes turns out to be regressive as expected.

• Journal of Korean Society for Quality Management
• /
• v.15 no.2
• /
• pp.20-26
• /
• 1987

An algorithm for the minimum total process percent defective under marginal costs is presented. Initial process is single series system, which is constructed by k process units, and each process is considered priority. Minimum of total process percent defective for parallel-series system exists when additional process setup costs are larger than marginal costs.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2016.05a
• /
• pp.162-163
• /
• 2016

This paper presents a mathematical model for optimizing earthwork allocation plan that minimizes earthwork cost. The model takes into account operational constraints in the real-world earthwork such as material-type (i.e., quality level of material) and quantities excavated from cut-sections, required quality of material and quantities for each embankment layer, top-down cutting and bottom-up filling constraints, and allocation orders. These constraints are successfully handled by assuming the rock-earth material as the three dimensional (3D) blocks. The study is of value to project scheduler because the model identifies the optimal earth allocation plan (i.e., haul direction (cut and fill pairs), quantities of soil, type of material, and order of allocations) expeditiously and is developed as an automated system for usability. It is also relevant to estimator in that it computes more realistic earthworks costs estimation. The economic impact and validity of the mathematical model was confirmed by performing test cases.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.26 no.1
• /
• pp.25-36
• /
• 2018

This paper presents a new airport slot allocation model that uses AIP model to balance the use of airport slots within existing capacity based on the limitation of capacity expansion of airport slots. This new model is called a 'balanced airport slot allocation model', which integrates the airport facility usage system, which is applied independently without linkage, with the airport slot allocation system, introducing the market logical characteristic of 'administered incentive pricing. In this paper, we propose a new proposal to dramatically change the airport slot allocation system in the current situation where the expansion of facilities is limited in the urgent problem of the airport slot shortage, and it is necessary to balance the airport slot allocation. Airline paying for the use of an airport slot can determine the slot of the desired time slot based on the costs incurred by differentiating in the new airport slot allocation model. This is a system that allows the airlines that are willing to pay a lot of money in the market to use preferred airport slots.

• Journal of Arbitration Studies
• /
• v.10 no.1
• /
• pp.26-46
• /
• 2000

International arbitration has been recognized as an effective dispute resolution method. Among the arbitration institutions, the ICC(International Chamber of Commerce) international court of arbitration is one of the most well-known and frequently chosen organizations to which international claimants have resorted, when they were confronted with international disputes. In this paper, costs in the ICC arbitration are compared with those in the KCAB(Korean Commercial Arbitration Board) arbitration. seeking efficient ways to reduce the costs while maximizing the quality of arbitral awards. Three main points about costs in the ICC arbitration and the KCAB arbitration are discussed and analysed, First, the cost structures are analysed and decomposed into manageable units. Second, the cost allocation is discussed to clarify its proportional responsibility among the arbitration parties. Third, how advances in arbitration costs are conducted is examined to explore a well established procedure of arbitration. In conclusion, the KCAB arbitration procedure has been found faster and cheaper than the ICC arbitration procedure in terms of time and costs, respectively. However, it can be cautiously suggested that the quality of arbitral awards made by the KCAB is not necessarily higher than that made by the ICC.

• Journal of Energy Engineering
• /
• v.11 no.1
• /
• pp.47-58
• /
• 2002

This paper presents a new method for the evaluation of avoided generation costs. Unlike conventional load decrement method, it exactly considers forced outage rate and economic loading order of IPPs (Independent Power Producers). Therefore we can provide exact generation avoided costs of IPPs by the developed method. Because probabilistic simulation is conducted in this method, effects on the costs of IPPs are exactly considered. Also we suggest an allocation method of avoided generation costs by participation factor. In the case studies we have shown avoided generation costs considering loading order and forced out-age rate by using this method.

• Environmental and Resource Economics Review
• /
• v.31 no.4
• /
• pp.571-595
• /
• 2022

This study theoretically analyzes the cost allocation of replacement costs that occur when existing operators have to replace circuit breakers due to the entry of new generators. We adopt the sequential equal contributions rule as the cost allocation rule, which is widely used in cost allocation problems in cooperative game theory. We derive various cost allocation plans based on several criteria and examine to what extent each alternative meets various desirable axioms. According to the analysis, (i) the alternative that excludes the cost of the new operator, residual value, and network operator and (ii) the alternative that excludes the cost of the new operator, residual value, and includes network operator are relatively superior to other schemes. We also identify a realistic plan by taking into account practical factors and analyze its axiomatic characteristics.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.28 no.3
• /
• pp.49-60
• /
• 2003

In this paper, we study the joint design of sampling inspections and service capacities for multi-products. Products of different defect rates which are either deterministic or random variables are supplied in batches after sampling inspection and rework. When supplied, all defective products that have not been inspected in batches are uncovered through total inspection and returned to service. We identify the optimal inspection policies and service capacities for multi-products reflecting the relationships between inspection rework costs and service provision costs. We also develope a marginal allocation algorithm for the optimal allocation of the limited total service capacity to products as well as inspection quantities.