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윤문길,김후곤,윤덕영 한국항공대학교 경영연구소 2002 경영연구 Vol.9 No.1
The concept of revenue management have been used mainly in the service-industries like hotel and air transportation which handles perishable asset. Recently however, it is being increasingly applied to many other areas including travel, railway and medicine. This paper tries to introduce the concept into the internet business. Revenue management used in the service industry is a good system for the management of perishable asset. Internet business can be classified acr various industries according to the characteristics of the individual companies. Contents providers and internet service providers are very similar to service industry, and revenue management system is suitable to them. This paper develops the ways to apply the revenue management concept to ISP business.
윤문길,송윤숙,이휘영 대한산업공학회 2008 대한산업공학회 춘계학술대회논문집 Vol.2008 No.5
This study is focused on the problem of integrated seat allocation for individual and group travel demand in airlines. We first explain the characteristic of air travel demand and its seat allocation process, and review the seat allocation model for package group demand. Modifying the individual demand, it can be expanded to assign seats for both individual and packaged group demand in a single framework. Furthermore, the expanded model can be useful to control seat request for ad hoc demand.
생존도를 고려한 계층적 구조를 갖는 광통신망의 설비망 설계에 관한 연구
윤문길 한국항공대학교 1994 論文集 Vol.32 No.-
고속/대용량 전송능력을 갖는 광통신망에서 전송링크의 장애는 커다란 정보의 손실을 가져온다. 이 때문에 최근들어 광통신망의 설계에 있어서 중요한 요소로 생존도의 개념이 고려되기 시작하였다. 본 연구에서는 계층적 구조를 갖는 광통신망에서 설비망의 설계시에 생존도를 고려한 설계모형과 해법을 개발하고자 한다. 생존도를 보장하기 위하여 1:N protection 방식을 적용하고, 망의 확장과 적절한 Commodity 정의 및 흐름제약 조건을 추가하여, 0-1 혼합정수계획 모형으로 정식화한다. 수립된 모형의 트수한 구조를 이용하여 효과적인 해를 제공할 수 있는 쌍대-기반 해법을 개발하고, 이 문제의 적용가능성 및 확장성에 대하여 언급한다. Owing to the possibility of severe service loss in the event of a single filber link failure, the network survivability becomes one of important design issues for fiber-optic communication networks. The major issue of network design problem with survivability is how to build costeffective network that is immune to unusual but catastrophic link failure such as cable cut. This paper deals with a comprehensive design issue of a survivable fiber-optic network with hierarchical structure. We select here the survivability method as diversely routed 1:N protection system on the hub nodes, i. e., there exist two link disjoint paths between hubs to be established for multiplexing the circuit demands. Under the survivability condition, we formulate a survivable facility network design problem as a 0-1 mixed integer programming problem, aidedd by network augmentation, judicious commodity definition, and some flow restrictions. Exploiting the special structure of the model, we develop a dual-based heuristic method to generate a good near optimal solution. Some concluding remarks are given, alogn with commnets on further research issues.