• Journal of KIISE:Computing Practices and Letters
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• v.10 no.4
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• pp.293-298
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• 2004

To satisfy the requirements for QoS and acceptance ratio of the users using multimedia content service, it is required to control mechanism for QoS assurance and allocation of the stream server' resources based on CoS(Class of Service). To compare performance of the algorithm, we have classified the user by two classes (super class, base class) and control the acceptance ratio of user's requests by user's class information. We have experimented the test of network resources and test of processing time under server/client environment and agent environment. MA-URFA based on agent increases the acceptance ratio of super class and utilization ratio of network resources.

• Proceedings of the Speleological Society Conference
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• 1992.07a
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• pp.42-42
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• 1992

본 논문에서 훈춘 농업개발을 위하여 농업생산의 기본 자료인 토양자원에 대하여 평가하고 개발 이용에 대한 평가 방법은 여러 가지가 있지만 본 논문에서는 지수-등급법을 사용하여 훈춘시 토양자원의 등급을 확정했다. 지수 항목에서는 일반적으로 통용하는 항목 외에 적산온도, 토양생산성능을 증설했고 지수 설정에서는 부동한 항목에 대하여 부동한 지수를 주였다. 토양자원의 등급획분에서는 계산한 지수의 대소에 따라 4등 6급으로. 나누어 토양의 비옥성과 작물배치의 적합성을 종합적으로 개괄했고 토양 이용 방향에 대해 제시했다.(중략)

• The KIPS Transactions:PartB
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• v.17B no.2
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• pp.149-156
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• 2010

Since the premature convergence phenomenon of genetic algorithms (GAs) degrades the performances of GAs significantly, solving this problem provides a lot of effects to the performances of GAs. In this paper, we propose a selective mutation method in order to improve the performances of GAs by alleviating this phenomenon. In the selective mutation, individuals are additionally mutated at the specific region according to their ranks. From this selective mutation, individuals with low ranks are changed a lot and those with high ranks are changed small in the phenotype. Finally, some good individuals search around them in detail and the other individuals have more chances to search new areas. This results in enhancing the performances of GAs through alleviating of the premature convergence phenomenon. We measured the performances of our method with four typical function optimization problems. It was found from experiments that our proposed method considerably improved the performances of GAs.

• 주택과사람들
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• s.189
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• pp.10-11
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• 2006

올해부터 2000가구 이상의 대규모 단지 아파트는 자동차나 컴퓨터 같은 일반 제품처럼 물건을 비교해보고 살 수 있다. 화장실 소음은 어느 정도이며 조망권과 일조 시간은 충분한지, 화재 · 방재 시설은 잘 갖춰져 있는지 등을 평가해 공개하는 '주택성능등급표시' 제도가 시행되기 때문이다. 이 제도에 따라 2008년부터는 1000가구 이상으로 확대 시행되며, 아파트 가격에도 큰 영향을 미칠 것으로 보인다.

• 월간 기계설비
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• s.182
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• pp.29-29
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• 2005

• JOURNAL OF ELECTRICAL WORLD
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• s.433
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• pp.41-48
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• 2013

• KHousing
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• v.4
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• pp.4-8
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• 2007

• KHousing
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• v.4
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• pp.9-12
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• 2007

• KHousing
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• v.4
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• pp.13-16
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• 2007

• Fire Science and Engineering
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• v.26 no.2
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• pp.1-10
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• 2012

While a performance based sprinkler design method has been widely used in UK and USA according to fire hazards of occupancies, Korean fire safety industry could not yet accept it due to nonstandardization on risk level of various occupancy. Even only two or three spray pattern sprinkler was produced in Korea fire safety industry, therefore, various spray pattern sprinklers have not yet introduced to major occupancies. Spray pattern sprinklers with one of two K value have been used in all occupancies in Korea Market. UK and USA's Fire industry should produced the spray sprinklers with various K-factors and protection area due to performance based sprinkler design requirement. Therefore the fire load density for main occupancies has been investigated in order to compare with installation standard in advanced countries. Eventually a lot of variations in orifice and K factors of standard heads were set up including special heads needed for high hazard areas such as large drop type, enlarged orifice type and early suppression fast response.