• 월간 기계설비
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• s.268
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• pp.57-62
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• 2012

국토해양부가 지난 9월 말 종합건설업체를 대상으로 '부실 불법 종합건설사 전면 실태조사'에 들어갔다. '시장 규모에 맞는 적정건설사 유지'란 목표 아래 초고강도로 진행 중인 이번 부실건설사 실태조사는 건설산업기본법 상의 자본금, 기술자, 사무실 등 등록기준 미달 여부를 조사하며 아울러 직접시공, 일괄하도급 여부까지 확대 조사한다. 또한 조사주체가 건설협회에서 지자체로 바뀜으로써 더욱 엄격하게 조사한다. 실태조사 결과 등록기준 미달 업체는 영업정지 6개월 또는 등록말소, 일괄하도급 위반 업체는 영업정지 8개월 및 형사고발(3년 이하의 징역 또는 3천만원 이하의 벌금), 직접시공의무 위반 업체는 영업정지 6개월의 처분을 받게 된다. 국토해양부는 전문건설업계도 매년 2차례에 걸쳐 시 군 구와 함께 재하도급, 동일업종 하도급 등의 위반여부에 대한 실태조사를 하고 있다. 그러나 올 하반기에 예정되어 있던 전문건설사 조사는 내년 상반기에 별도로 시행할 계획이다. 이에 앞서 대한설비건설협회는 건설산업 공생발전위원회를 통해 "전문건설업계의 어려운 실정을 감안하여 실태조사를 유예하여 줄 것"을 건의 한 바 있다. 이에 따라 본지는 내년 상반기에 실시 예정인 국토해양부의 전문건설사 실태조사 시 회원사들이 불이익을 받지 않도록 재하도급, 동일업종 간 하도급, 일괄하도급, 직접시공, 영업정지 기간 중 건설업 영업행위 등의 위반에 대한 건설산업기본법 관련 규정을 게재한다.

• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.749-756
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• 2002

As Internet access through mobile devices is increasing, Mobile IP is the protocol to provide the mobility of a host on the existing IP. It is important to provide secure authentication when mobile node register with home agent through the foreign agent each time it moves. In this paper, we propose the authentication mechanism using a regional registration. The proposed authentication mechanism reduce frequent home registration in regional movement. The simulation results show that the proposed authentication reduces the total registration time and is more efficient than conventional registration mechanism.

• The Hankook-Saengyark Bo
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• no.230
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• pp.3-3
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• 1998

• 발명특허
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• v.9 no.9 s.103
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• pp.60-61
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• 1984

• 보일러설비
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• s.109
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• pp.106-107
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• 2003

• 발명특허
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• v.8 no.11 s.93
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• pp.20-27
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• 1983

• 월간 기계설비
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• s.169
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• pp.16-17
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• 2004

• IE interfaces
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• v.15 no.4
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• pp.401-408
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• 2002

An efficient mobility management for mobile stations plays an important role in mobile communication network. In this study, we consider movement-based registration(MBR) and distance-based registration(DBR). Analytical models based on 2-dimensional random walk in hexagonal cell configuration are considered to analyze the performance of MBR and DBR. Especially, we focus on the derivation of the registration cost of DBR scheme by using two analytical methods and then show that DBR always outperforms MBR. Numerical results are provided to demonstrate optimal condition under various circumstances.

• Journal of Korean Institute of Industrial Engineers
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• v.23 no.2
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• pp.385-401
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• 1997

In this paper, we evaluate the performance of zone-based registration and distance-based registration. First, we propose the mobility model which can be used to analyze the performance of both zone-based registration and distance-based registration. And using the proposed mobility model, we obtain several performance measures and perform numerical computation to compare the performance of two registration methods. Numerical results show that in general zone-based registration needs less number of registration than distance-based registration. On the other hand, if distance-based registration is used, registration load is equally distributed to all cells in a location area and ping-pong phenomenon is not occurred. And when a VLR area is composed of a few location areas, distance-based registration may need less registration load than zone-based registration. Therefore, a proper registration method should be selected considering system circumstances and implementation complexity, and the selected method should be implemented so as to change system parameters according to system circumstances.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.12B
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• pp.2430-2437
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• 1999

This paper introduces an adaptive time-based location update scheme that dynamically determines when to perform location update based on moving distance of mobile station and incoming call arrival probability using fuzzy logic. Comparison with other schemes demonstrate that proposed scheme adapts well to the environment where the characteristics of mobility pattern of mobile station is changed all the time, and reveals better performance in the aspect of network signaling load.