• Journal of Information Processing Systems
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• 제14권2호
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• pp.377-395
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• 2018

Aiming at the problem of service reliability in resource reservation in cloud computing environments, a model of dynamic cloud resource reservation based on trust is proposed. A domain-specific cloud management architecture is designed in which resources are divided into different management domains according to the types of service for easier management. A dynamic resource reservation mechanism (DRRM) is used to test users' reservation requests and reserve resources for users. According to user preference, several resources are chosen to be candidate resources by fuzzy cluster analysis. The fuzzy evaluation method and a two-way trust evaluation mechanism are adopted to improve the availability and credibility of the model. An analysis and simulation experiments show that this model can increase the flexibility of resource reservation and improve user satisfaction.

• 디지털산업정보학회논문지
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• 제11권2호
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• pp.67-72
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• 2015

As new Information technology such as IoT develops rapidly, a lot of changes are occurred in our lives. The Internet of Things is the network of physical objects or things embedded with electronics, software, sensors and connectivity to enable it to achieve greater value and service by exchanging data with the manufacturer, operator and/or other connected devices. This change is also applied to tourism industry. These days many people make a tour reservation using the internet. But it is required to consider the efficiency and security of tour reservation system. In this paper, we suggest a tour reservation system. First, we describe the computer reservation system, hotel reservation system and reservation system. Second, we perform the modeling of general reservation system and suggested reservation system. Third, performance evaluation is carried out with respect to efficiency and security. The results show that the suggested reservation system has a better performance than a general reservation system. At last we described the results and future works.

• 한국병원경영학회지
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• 제22권4호
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• pp.50-60
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• 2017

Purposes: The purpose of this study was to identify the preferred types of the hospital reservation cancellation management to help reduce the reservation cancellations. Methodology: This study sampled 327 outpatients or their guardians who had reserved a university hospital and a general hospital located in the southwestern part of Seoul, and the responses from 300 of them were used for the final analysis. The subjects' preferences of reservation cancellation management types were analyzed in reference to their demographic variables. The timing and frequency of pre-notification preferred by the subjects were examined. A multidimensional scaling methods and correspondence analysis was used to identify preference for management methods of no-show and type of reservation guide. Findings: As a result, 77.3% of the respondents were perceived that the reservation cancellation was a habit. The most preferred method of managing the reservation cancellation would be refusal to refund the reservation deposit (61.7%), followed by payment for cancellation (16.0%), limit of future reservations (16.0%) and penalty (6.3%) in their order. 186 of the subjects (62.0%) preferred the texting for prevention of reservation cancellations, and 102 of the subjects (34.0%) preferred the phone calls. The preferred timing and frequency of the SMS were twice 3 days before, once a day before and three times 7 days before, while the preferred timing and frequency of phone call was once a day before. Practical Implications: The no-show rate can be improved by enhancing SMS pre-notification and by improving afterwards telephone counseling. For other factors, it needs to study on the service differentiation with the characteristics of each patient group.

• 경영과학
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• 제21권3호
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• pp.1-12
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• 2004

The paper demonstrates that versioning of digital products occurs more frequently than that of physical products because of low marginal cost. The versioning occurs no matter what a customer knows his/her reservation price. Low-quality version will not be produced when the difference between reservation prices is very large. The paper also shows that a firm tries to lower the quality of low-quality product to prevent customers with high reservation prices from purchasing low-quality product.

• 경영과학
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• 제21권3호
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• pp.71-84
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• 2004

CRS, which was initially developed to support airline reservation is now the main part of e-business of airlines, and it decides the degree of prompt and accurate itinerary for travelers due to the remarkable difference in availability inquiry and seats reservation information according to CRS joining level CRS joining level also decides the exactness of reservation, ticketing and traffic data collection and plays the most important role in the exactness of advanced forecast of demand, appropriate seats allocation, and overbooking. Therefore, it provides front end function like seats reservation, schedule display, fare inquiry on-line linked with CRS and back office function like sales result of travel agents, accounting administration. stock administration and customer administration and decides the level of an airline's e-business.

• 가정과삶의질연구
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• 제7권1호
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• pp.119-138
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• 1989

This study attempts to apply its result to decision whether housewives are in the labor market or not by investigating the level of reservation wage of them and the influencing factors on it. The purpose of this study is to analyse the effects by identifying , on the basis of theoretical models, the factors that influence reservation wage, and to predict future state of female employment. 1) The level of reservation wage of housewives showed significant differences by husband's income, household asset, housewife's education level, housewife's age, number of children division of husband in household labor, and by three marketization of housework. 2) The variables which affected reservation wage of housewife independently had influence on it in the following order: Husband's income, education level, age affect positively reservation wage of housewife, and a negative relation has been found between division of husband, level of commodity substitution and reservation wage of housewife. 3) Husband's income, housewife's education level, housewife's age, division of husband in household labor, level of commodity substitution give direct effects on reservation wage of housewife. Education level, age, number of children and family type influenced reservation wage of housewife through level of commodity substitution indirectly.

• Industrial Engineering and Management Systems
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• 제8권2호
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• pp.72-79
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• 2009

The ultimate goal of inventory management is to decide the timing and the quantity of ordering in response to uncertain demands. Recently, some researchers have focused upon an impact of distortions in the information, e.g., customer order cancellation, on an economical inventory policy. The customer order cancellation is considered a kind of distortions in demands, because a demand that is eventually cancelled is equivalent to a phony demand. Also, there are some additional distortions in the inventory information. For instance, the procurement of suppliers may include some nonconforming items as a result of imperfect production and inspection by the suppliers, and/or damage in transit. The nonconforming item should be considered a kind of distortions in the inventory information, because the nonconforming item is equivalent to a phony stock. In this article, we consider an inventory model under the situation that customers can cancel their orders and the procurement of suppliers may include some nonconforming items. Then, we introduce the customer order reservation into the inventory model for the purpose of avoiding the costly backlogs, because the customer order reservation gives retailers a period to fulfill customer's requests. We formulate a periodic review (s, S) inventory model and investigate the economical operation under the situation mentioned above. Further, through the sensitivity analysis, we show the impact of these distortions and the effect of the customer order reservation on the inventory policy.

• 품질경영학회지
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• 제45권4호
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• pp.957-968
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• 2017

Purpose: There are lots of efforts to increase the revenue of on-line travel agency due to the extreme competition in the hospitality industry. One of the way to improve the revenue is applying new concepted service for their business. In this study, it is introduced an innovative system design of hotel reservation for the on-line travel agency using the concept of an opaque product. Methods: By adopting the opaque product at the hotel reservation system, the reservation requests can increase because the customer tends to feel that they purchase the hotel service with relatively cheap price. The overall process for an innovative hotel reservation system is presented and the core algorithm to implement this system is also suggested through a mathematical model based optimization method. Results: To validate and to examine the proposed process and core algorithm, a numerical example is provided with the modified data of the hotels in Seoul metropolitan city. The discount prices and the overall revenue of hotels are generated according to hotel grade. Conclusion: It is confirmed that the revenue of the hotel tends to increase according to its grade. This is because that the customer want to use the new service which applying the concept of opaque product when the higher discount ratio are decided for lower grade hotels.

• 한국통신학회논문지
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• 제38B권11호
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• pp.902-910
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• 2013

한국의 대표적 연구망인 KREONET은 사용자 가상회선 서비스를 위해 사전 예약 기반의 네트워크 서비스 에이전트인 DynamicKL 시스템을 개발하여 왔다. DynamicKL은 오픈 그리드 포럼 (OGF)에서 네트워크 자원 제어서비스를 위해 정의한 표준인 네트워크 서비스 인터페이스 (NSI) 및 그래픽 유저 인터페이스 (GUI)를 이용하여 예약, 할당, 해제, 종결, 조회 가상 회선 서비스를 제공한다. 또한 사용자에 의해 앞서 생성된 가상 회선과 예약들에게 가상회선 별로 보호 절체 관리 기능을 제공하기 위해 RICE 인터페이스를 갖는다. 본 논문은 DynamicKL 프레임워크 안에 구현된 가상회선 별 보호 절체 관리 기능을 가상 회선 서비스 관리 이슈 중 하나로 소개하고 이는 선진 연구망에서 개발한 다른 사전 예약 프레임워크 들과 비교하여 관리 및 안정성이 확보된 가상 회선 서비스를 제공하는데 기여한다. 관리자는 RICE 인터페이스를 사용하여 주회선 링크 장애시 백업 링크 안에 주 가상회선 들의 성공적인 보호 절체 유무 및 주회선 링크 복구 후 주회선 링크 내부에 주 가상회선 들의 성공적인 재생성 유무를 감지 할 수 있다.

• 한국통신학회논문지
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• 제29권7B호
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• pp.685-696
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• 2004

많은 양의 대역폭을 사용하는 실시간 멀티미디어 응용들은 일정 수준의 서비스 품질을 보장받기 위해 필요한 자원을 사전에 예약하고 이를 사용할 수 있어야 한다. 자원의 사전 예약을 위해서는 해당 자원에 대한 사용 기간의 명시와 이를 이용해 자원을 사전에 예약하고 할당하는 자원 관리자가 필요하다. 따라서 자원의 사용 기간에 관계없이 예약 요청 발생시점에서 가용 자원의 양만을 고려하는 전통적인 자원 할당 방식과는 달리 사전 예약을 제공하는 자원 관리자는 사전에 예약된 자원과 사용 기간을 명시하지 않는 즉석 예약을 위해 할당된 자원이 서로충돌하지 않도록 예약 요청들을 처리해야 한다. 일반적으로 자원 예약의 충돌은 예약 형태에 따라 할당 자원을 분리함으로써 해결할 수 있지만 이는 자원의 낭비를 초래하게 된다. 본 논문은 즉석 예약과 사전 예약 요청을 위해 준비된 자원 공간을 변동하는 자원 경계를 이용해 효율적으로 공유하는 자원 관리 방식을 제안한다. 제안하는 자원 관리 방식은 네트워크 비용 함수를 이용해 자원 간 경계를 설정하고, 예약 자원의 충돌에 따라 비용 함수의 가중치 변수를 조정해 경계를 변화시킴으로써 공유 자원을 효과적으로 할당하고 관리한다. 또한, 사용자 효용 함수의 정의를 통해 예약된 자원을 사용하는 서비스의 품질로부터 사용자가 얻는 효용을 정량적으로 측정하며, 자원의 사전 예약이 사용자 효용 및 전체 자원 활용에 미치는 영향을 고찰한다. 네트워크 시뮬레이터(NS-2)를 이용한 실험은 제안한 자원 관리 방식이 자원 공간의 고정 분할과 같은 방식과 비교해 높은 자원 활용율과 더불어 안정적인 서비스 품질을 제공할 수 있음을 보여준다.