• Bulletin of the Korean Space Science Society
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• 2002.05b
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• pp.40-40
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• 2002

• Bulletin of the Korean Space Science Society
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• 2004.10b
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• pp.351-355
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• 2004

A multibeam switching satellite system technology have started localized development to overcome the limitation of the frequency resource and geostationary orbit existing relay type satellite transponder and the required performance of the spot beam, and looked around the configuration and functions of the multibeam switching satellite communication system. This paper proposed that operation scheme and network control features for service definition, network architecture, transmission method of the natural disaster service network and public communication service network using this system.

• Bulletin of the Korean Mathematical Society
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• v.43 no.2
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• pp.277-292
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• 2006

We consider a single-server queue with service time distribution of phase type where positive customers, negative customers and disasters arrive according to a Markovian arrival process with marked transitions (MMAP). We derive simple formulae for the stationary queue length distributions. The Laplace-Stieltjes transforms (LST's) of the sojourn time distributions under the combinations of removal policies and service disciplines are also obtained by using the absorption time distribution of a Markov chain.

• Bulletin of Food Technology
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• v.12 no.3
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• pp.71-84
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• 1999

외식의 기회는 생활 습관의 변화에 의하여 매년 성장해 간다. 5년전과 비교 시 새로운 것을 먹는 기회보다는 다양한 service를 제공하는 쪽으로 변해간다. 1997년 NFS(National Food Service)에서 외식에 대한 조사 결과가 1999년 2월에 Meat Demand Trends에 편집 및 요약되어졌다. 외식을 위한 통합 식품의 소비는 년초 주당 1인 5파운드를 쓴 것에 비해 4% 증가하였다. 이 article은 조달시장에서 소비된 고기 식사수와 조달업자들이 고기 구입 시 중요한 정보로 이용될 수 있을 것이다.

• Convergence Security Journal
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• v.12 no.1
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• pp.71-77
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• 2012

Along with the development of Internet services such as Social Network Service (SNS) and blog Service, the privacy is very important in these services. But personal data is not safety from exposure to internet service. If personal data is leak out, the privacy is disclosed to hacker or illegal person and the personal information can be used in a cyber crime as phishing attacks. Therefore, the model and method that protects to disclose privacy is requested in SNS and blog services. The model must evaluate degree of exposure to protect privacy and the method protects personal information from Internet services. This paper proposes a model to evaluate risk for privacy with property of personal data and exposure level of internet service such as bulletin board. Also, we show a method using degree of risk to evaluate with a proposed model at bulletin board.

• Bulletin of the Korean Chemical Society
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• v.31 no.7
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• pp.2081-2084
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• 2010

• Bulletin of the Korean Space Science Society
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• 2002.10a
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• pp.32.2-32
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• 2002

• The Bulletin of The Korean Astronomical Society
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• v.34 no.2
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• pp.53.2-53.2
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• 2009

• Bulletin of the Korean Chemical Society
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• v.30 no.10
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• pp.2453-2456
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• 2009

• Bulletin of the Korean Chemical Society
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• v.29 no.11
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• pp.2227-2230
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• 2008