• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.1361-1364
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• 2002

지능형 사설교환시스템 형태의 SIP(Session Initiation Protocol) VoIP 게이트웨이를 설계 구현한다. 구현한 VoIP 게이트웨이는 기존의 사설교환기 접속 게이트웨이가 아니라 아날로그 전화기를 직접 연결하여 사용할 수 있는 사설교환기 내장형 VoIP 게이트웨이를 구현하고 SIP UA(User Agent)를 이용하여 각각의 포트에 고유한 전화번호를 부여할 수 있도록 구성한다. 이러한 전화번호는 사설망의 내선 번호와 같은 의미를 가지며, 간단한 형태의 위치정보 서비스이다. 또한 인터넷을 통하여 음성 통신 호 신호의 인바운드와 아웃바운드를 가능하게 한다.

• 보건세계
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• v.43 no.6 s.478
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• pp.12-15
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• 1996

국립마산요양소에서 가망이 없다고 입원을 거절당하고 사랑하는 아내와 동생마저 결핵으로 잃은 그는 기적적으로 살아나 사설요양원 설립에 전재산과 몸을 던졌다. 그러나 무지한 주민들의 폭력 앞에 준공 직전 그의 신념과 선의는 무참히 좌절되고 말았다.

• Journal of the Economic Geographical Society of Korea
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• v.14 no.1
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• pp.33-51
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• 2011

This study investigates the spatial characteristics of the provision of and demand for the private tutoring service industries and the consumer groups. For the purpose, we analyze the spatial characteristics of various types of tutoring institutes in the Seoul Metropolitan area. In particular, we exam the spatial distribution patterns of attendants of tutoring institutes by institution type as well as the resident population by attendant age group. By applying spatial autocorrelation analysis, we examine the spatial clustering patterns of tutoring institutes and attendants by type. The results show distinct differences in the spatial distribution patterns by tutoring institute type as well as by attendant age group. We found significant socio-economic variables which influence on the spatial distribution of tutoring institutes. Finally, we propose private tutoring service provision models constructed with these variables through multiple regression analysis.

• Sijohaknonchong
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• v.21
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• pp.23-46
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• 2004

The purpose of this thesis is to clarify the aspect on the Leisure-Activity of Sasul-Sijo in Choson Dynasty. The Aspect on the Leisure-Activity of Sasul-Sijo can be divided into three type, Three type are the recreation. the health-care, and the self-discovery. The type of the recreation is reversed the Youth age-Leisure in the second chapter, the type of the health-care is reversed the Old age-Leisure in the third chapter, the type of the self-discovery is reversed the Youth age and Old age-Leisure in the fourth chapter. In order to study the Aspect on the Leisure-Activity of Sasul-Sijo which have succeeded up to present without interruption, it is to gather more materials, widen an appreciative eye our leisure-activity and deepen the till now study continuously.

• Korean Security Journal
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• no.14
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• pp.181-194
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• 2007

Social psychological suspense has been increased rapidly because of a lack of morality by individual personality and offense by dissatisfactory desire. To help safety area from the situation, a professional private security guard company is increased remarkably. Followed by data from the National Statistical Office, the security guard companies and the guards had been increased. In 1999, there were 994companies and 25,464 employees were registered but in 2004, there were 1,081companies and 35,876 employees were registered. Based on the data, Security guard becomes a popular career but we should consider that the service also has been improved. Dissatisfactory service could occur to a fastidious person. The purpose of this study is to become a trustful and respectful private guard's activity through analyze defective activities of private guards and matters of what the customer feels.

• Journal of the Korea Society of Computer and Information
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• v.17 no.3
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• pp.113-120
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• 2012

VoIP provides voice data service using existing IP networks and has received much attention recently. VoIP service has a variety of security vulnerabilities. Types of main attacks on VoIP service are tapping/interception, DoS attacks, spam, misuse of service attacks and the like. Of these, confidential information leak because of tapping/interception has been considered as a critical problem. Encryption techniques, such as SRTP and ZRTP, are mostly used to prevent tap and intercept on VoIP media information. In general, VoIP service has two service scenarios. First, VoIP service operates within a single private network. Second, VoIP service operates between different private networks. Both SRTP and ZRTP for VoIP media information within a single private network can perform encryption. But they can not perform encryption between different private networks. In order to solve this problem, in this paper, we modify SRTP protocol. And then, we propose an encryption method that can perform encryption of VoIP media information between the different private networks.

• The KIPS Transactions:PartA
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• v.14A no.1 s.105
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• pp.1-14
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• 2007

MPICH-G2 is an MPI implementation to solve complex computational problems by utilizing geographically dispersed computing resources in grid environments. However, the computation nodes in MPICH-G2 are exposed to the external network due to the lack of supporting the private IP clusters, which raises the possibility of malicious security attacks. In order to address this problem, we propose MPICH-GP with a new relay scheme combining NAT(Network Address Translation) service and an user-level proxy. The proxy running on the front-end system of private IP clusters forwards the incoming connection requests to the systems inside the clusters. The outgoing connection requests out of the cluster are forwarded through the NAT service on the front-end system. Through the connection path between the pair of processes, the requested MPI jobs can be successfully executed in grid environments with various clusters including private IP clusters. By simulations, we show that the performance of MPICH-GP reaches over 80% of the performance of MPICH-G2, and over 95% in ease of using RANK management method.

• KOREAN POULTRY JOURNAL
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• v.13 no.4 s.138
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• pp.113-115
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• 1981

범국가적인 식량차원에서 축산업은 더욱 발전해야 한다. 이를 위하여 정부는 금년 1월 축협중앙회를 출범시켰으며 이와 때를 같이해 기존 연구기관과는 달리 국내에서는 처음으로 제일축산 윤도진사장에 의해 개인의 사재로 운영될 사설연구기관인 한국 축산과학연구소가 그 업무를 개시했다. 기자는 지난 3월18일 오전 경기도 이천군 부발면 아미리의 제일축산사료공장 신공장에 위치한 연구소를 찾아 여기에 한국 축산과학연구소를 소개한다.

• Sijohaknonchong
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• v.25
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• pp.29-48
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• 2006

Saseol Sijo which reflects on people's life often showns us relationships between love and economy of those periods' people in Chosun dynasty. Meaning of a word 'housewife' is a woman who supporting and organizing family with her husband. Materialistic problems and economic problems appeared in Saseol Sijo emphasize entertaining and merrymaking rather than struggling to the society enforcing poverty. Therefore, it is often said that Saseol Sijo stimulates overconsumption of goods and money. We can regard sexual discussions appeared in those periods' Saseol Sijo as reflections of desire which are the way of releasing repressed sexual appetite of women or substitutions of satisfying their sexual appetite. Features of housewives appeared in Poong-ryu-bang and Saseol Sijo which are succeeded as productions of merrymaking in Latter half period of Chosun dynasty, can spotlight because of its meanings. It told us not only housewives' roles are started to change but also vivid sexual discussions similar to nowadays things are begun in latter half Period of Chosun dynasty. Main subject pecuniary mediated sexual discussion of housewives appeared in Saseol Sijo teaches a lot of things to twenty first century's contemporary people experiencing collapsed family relationship, pariakapitalismus and wide spread sexual industries.

• The Journal of the Convergence on Culture Technology
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• v.5 no.3
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• pp.125-130
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• 2019

This research is about alternative measure of main components for sprinkler system like automatic wet pipe sprinkler system, dry pipe sprinkler system, pre-action sprinkler system, vacuum sprinkler system, deluge sprinkler system, and so on. By replacing the alarm check valve, dry valve, pre-operated valve, and deluge open valve with a solenoid valve, it be can be simplifed the various processes of the manufacturing process into one process, it creates an environment in which one standardized product can be produced simultaneously on a single machine. Therefore, it could improve the price competitiveness of products, reduce the maintenance cost, and help the adaptability of new sprinkler systems in the future. There is a benefit when it comes to apply to sprinkler system. Only replace the valve which is used to control primary and secondary valve such as wet, dry, pre operated, vacuum, deluge system valve. Other components such as retarding chambers, automatic air compressors, accelerators or adjusters, supervisory panels, vacuum pumps, and manual starters can be used as they are, so they can be easily applied to existing sprinkler system. It is needed to legal and institutional study for solenoid valve applied sprinkler system to commercialize.