• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.69-72
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• 2015

계산 과학 분야에서 자원을 필요한 만큼 빌려 쓸 수 있는 클라우드 기술을 적용하여 과학 클라우드(Science Cloud)를 구축하는 연구가 활발해지고 있다. 특히 의료 분야에서는 3D 볼륨 렌더링과 갈은 고성능의 자원을 활용한 대규모 작업 계산 응용이 있다. 이러한 응용의 성공적인 작업 수행과 실시간으로 변화하는 자원 수요에 대처하여 클라우드 자원을 효율적으로 관리하기 위한 오토 스케일링 엔진 개발이 필요하다. 그러나 대부분의 오토 스케일링 엔진은 단순한 하드웨어의 성능을 기반으로 제공되고 있어 클라이언트에 따라 부하를 고려해야한다. 본 논문에는 클라이언트에 따라 가중치를 적용한 동적인 SLA 기반으로 자원 수요를 예측하고 클라우드 자원을 효율적으로 관리하는 오토 스케일링 엔진을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.229-230
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• 2019

본 논문에서는 해수면 온도에 따라 양식장의 깊이를 연장하여 어족자원을 보호하기 위한 스마트 양식장 깊이 제어 시스템을 제안한다. 가두리 양식장의 경우 이상 고온현상에 의하여 해수면 온도가 상승하면 어족자원의 집단폐사를 가져온다. 해수면 온도가 어족자원의 폐사를 유발할 수 있는 온도에 이르면 사용자에게 통지하고 양식장의 깊이를 5m 연장시켜 어족자원이 뜨거운 해수면을 피할 수 있도록 하며, 어족자원의 수확을 필요로 할 때에는 양식장을 해수면방향으로 당길 수 있는 시스템이다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.988-990
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• 2005

본 논문에서는 그리드 컴퓨팅 환경에서 사용자와 자원 제공자간의 자원거래 시 사용자의 자원 요구량을 예측하고, 합리적인 가격 결정 알고리즘을 이용하여 기존의 자원 거래 모델에 비해 빠른 응답 속도를 갖는 모델을 제안한다. 본 논문에서 제안하는 모델은 사용자의 자원 요구량를 예측을 위해 통계학의 예측 모델을 적용하였고, 그리드 자원의 거래 가격 결정을 위한 경제학의 이론을 도입하였다. 우리는 실험을 통해 기존의 모델들과 비교하여 그리드 자원 거래를 위한 응답시간을 비교 하였다. 우리는 실험을 통해 기존의 모델들과 비교하여 응답시간이 최소 $72.39\%$ 향상된 결과를 얻었고 우리가 제안한 모델이 기존 모델에 비해 우수하다는 것을 입증하였다.

• Journal of KIISE:Computer Systems and Theory
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• v.36 no.3
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• pp.181-190
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• 2009

Module is an object file that can be loaded into operating system dynamically and has complete privileged access to all resources in kernel. Therefore trivial misuses in a module may cause critical system halts or deadlock situations. In this paper, we propose Kernel Resource Protector(KRP) scheme to reduce the various problems caused by module. KRP provides protections of a variety of kernel resources such as memory, major number and work queue resource. We implement the scheme onto linux kernel 2.6.18, and experimental results show that our scheme can protect kernel resources effectively.

• The KIPS Transactions:PartD
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• v.13D no.2 s.105
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• pp.183-190
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• 2006

Database workloads may show different resource usages for database applications. Database administrators can enhance the DBMS performances through resource management that reflects workload characteristics. We provide a method that can identify tunable resources from analyzing the relationship between performance indicators and resources. First, we select which performance indicators increase or decrease by expanding resources using a correlation coefficient and a significance level test. Next, we identify resources that can affect the DBMS Performances by using increasing or decreasing performance indicators. We evaluated our method in the TPC-C and TPC-W environments.

• Journal of Information Management
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• v.34 no.2
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• pp.25-53
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• 2003

Libraries have a variety of resources due to the endless changes of the library environment. Electronic resources have become the one of the important library resources. As an electronic resource, e-Book has emerged recently and is worth of notice to be a great resource in the libraries. This study reviews the history and special features of the e-Book. This paper analyzes the functions and problems of e-Book and changes of the library services related e-Book. The purpose of the study is to point out the problems and suggest the possible solutions of e-Book usages in the university libraries by the survey.

• The Journal of Korean Association of Computer Education
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• v.6 no.4
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• pp.147-155
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• 2003

Most of web-based education systems are only to supply education information. As the web becomes the common basis to support the effective education, it is used for not only applying education information but also developing to the dimension to provide various services. The education service models prospering to the newly diverse environment are necessary. In this paper, a education resource service system based on functional broker is implemented to overcome the weakness of the traditional Web-based instruction. This paper shows that the web-based education service system such as functional broker can manage the varied education resources efficiently and so contribute to realize the life-long education.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.4
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• pp.90-99
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• 2002

Grid makes it possible to cooperate with other network area by sharing and using distributed resources. In order to manage effectively large-scale Grid network resources, Grid NOC needs monitoring architecture that can manage distributed resources in one time. Being restricted within specific managing area conventional network management system has limitation in extension of managing area and in general management of heterogeneous resource. In this paper, we design a monitoring architecture that can take in the situation and has scalability. In the monitoring architecture the network areas publish information in a common directory service, and then Grid NOC can connect to the network areas directly by using this information. Therefore, it makes us possible to manage overall large-scale resource of Grid network reducing load.

• Journal of KIISE:Information Networking
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• v.31 no.1
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• pp.112-122
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• 2004

In this paper, we propose a mobility estimation model based on inner regions in a cell and a dynamic resource reservation scheme which can control dynamically classes of mobile hosts on the mobile network. The mobility estimation model is modeled based on the reducible Markov chain. And the mobility estimation model provides a new hand off probability and a new remaining time for the dynamic resource reservation scheme. The remaining time is n estimated time that mobile hosts can stay in a cell. The dynamic resource reservation scheme can reserve dynamically a requested resource according to the classes of mobile hosts. This scheme can efficiently improve the connection blocking probability and connection dropping probability.

• Journal of the Society of Disaster Information
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• v.11 no.3
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• pp.376-384
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• 2015

It needs a framework to minimizing the damage using the just-time just-resources strategy. But it is not easy to put 'what kinds of resources', 'how many resources', 'from where institutions', and 'how much money for the reimbursement'. So most of the local government depends on the field manager. In this study, we analysed the conventional system and provides the efficient methodology to the stockpiling and mobilizing against to the disaster. The study does not provide the stockpile amount for the local governments, because the stockpile amounts must consider the local diverse situations.