• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.219-219
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• 2003

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.397-399
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• 2002

유선망에 최적화되도록 진화해온 TCP는 무선망이 가지는 링크의 불안정함으로 인한 손실을 네트워크의 혼잡으로 인한 손실로 오해한다. 그 결과 혼잡 제어 메커니즘이 수행되어 전송율을 줄이므로 네트워크 성능이 저하되는 문제점을 초래한다. 이러한 이유로 최근 유ㆍ무선 혼합망에서 TCP의 성능을 향상시키기 위한 연구가 활발히 이루어지고 있다. 본 논문에서는 기존에 제안된 기법들 중 상대적으로 뛰어난 성능 향상을 보이는 snoop protocol이 유ㆍ무선 혼합망 특히 CDMA망에서 가지는 문제점을 분석하고 이를 보완하는 기법을 제안한다.

• Archives of Pharmacal Research
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• v.27 no.6
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• pp.581-588
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• 2004

A series of 2, 5-dihydroxychalcones and related compounds were synthesized, and their cyto-toxicities against tumor cell lines and human umbilical venous endothelial cells (HUVEC） eval-uated. It was found that chalcones, with electron-withdrawing substituents on an A ring, exhibited significant cytotoxicities. Among the synthesized compounds, 2'-chlbro-2, 5-dihydrox-ychalcone (9） was most potent, with an $IC_{50}$ value as low as $0.31{\;}{\mu\textrm{g}}/mL$. This compound also exhibited a significant cytotoxic selectivity toward HUVEC.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.723-724
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• 2006

Exploiting the instruction level parallelism encountered with the limit. Single chip multiprocessor was introduced to overcome the limit of traditional processor using the instruction level parallelism. Also, a branch miss prediction is one of the causes that reduce the processor performance. In order to overcome the problems, in this paper, we make single chip multiprocessor having the idle core execute the two control flow of conditional branch. This scheme is a kind of multi-path execution technique based on single chip multiprocessor architecture.

• KIEAE Journal
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• v.6 no.2
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• pp.27-34
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• 2006

The purpose of this study is to develop the sustainability indicators for assessing environmental sustainability of building. This reseach focused on evaluating indicators for passive design in the stage of site planning and building massing. In order to achieve the aims of this study, first priority was given to set up systematic framework of sustainability indicators for passive design. Based on the framework, the assessment categories and indicators by each category were established. Secondly, the weighted value of each indicators were obtained by questionnaire survey of the experts. As the result of the analysis of questionnaire of experts, feasible indicators were obtained and the grades of measured values were deduced. Finally, this paper presented comprehensive environmental sustainability indicators which is related to the passive design.

• Annual Conference of KIPS
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• 2002.11b
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• pp.1463-1466
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• 2002

본 논문은 인터넷과 이동전화 사용자가 늘어감으로써 무선인터넷의 필요성이 대두고 있는 가운데 WAP 환경에서 주관식 채점시스템을 접목시킨 시스템을 구현하고자 한다. 근거리통신, 무선인터넷 등의 통신을 이용하여 학습자가 주제별 주관식문제에 응시한 후 해당 답안 정보는 출제자 무선단말기에 푸쉬(Push) 메시지 형태로 즉시 보내지고, 출제자는 학습자의 답안정보를 받아 무선단말기를 이용하여 학습자가 작성한 답안의 배점을 결정하고 채점결과를 서버에 보낸 후 서버는 이 배점으로 채점결과를 학습자에게 신속하게 알려주는 시스템으로 학습자는 신속한 채점결과를 확인하여 학습능력을 향상시킬 수 있는데 목적이 있다.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.1203-1205
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• 1998

Fault Detection of power system must be rapid and precise over input signal without relation to any disturbance. But, it is difficult to detect current unbalance, over voltage, and underfrequency for digital relay comparison of fault perfectly. In this paper, we measure each phase current and infer type of fault using fuzzy pattern classification.

• Proceedings of the KIEE Conference
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• 1995.07b
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• pp.813-816
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• 1995

The shape and width of fuzzy membership function has an effect on performance of fuzzy controller. In this paper, neuro-fuzzy controller is proposed to improve the control performance of fuzzy controller. It has membership function, that is adapt to plant constant by using trained neural network. This neural network has been trained with back propagation algorithm. To show the effectiveness of proposed neuro-fuzzy controller with adaptive membership function, it is applied to plant (dead time + 1st order) with various plant constant.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.74-75
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• 2019

There are certain types of construction that produces many defects during the construction of apartment buildings. It may be due to construction errors in the type itself, but more often, it is due to defects derived from other types of construction. Thus, to reduce such secondary defects and prevent fundamental defects in particular types of construction, academic research on the types of construction causing secondary defects should be actively conducted. In addition, as claimed in this study, the industries should work harder to improve the quality of the type of construction that causes secondary defects, rather than just trying to improve the ostensible problems. If the efforts of each sector are backed up, the disputes over defect repair in apartment building construction will reduce in general, which in turn will lead to a reduction in national loss within the construction industry.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.05a
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• pp.232-233
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• 2019

The plater work in the standard of estimate presents a variety of construction types. However, there is a part that does not fit the change of specification standards and on-site construction status, and it was revised in 2019's standard of estimate. In this study, we analyzed in detail the factors affecting the changes in estimating standards in the plater work. There were changes in the specification standards previously presented as primary coat, secondary coat, and formal coat as well as changes in on-site construction status such as thickness according to the number of plastering. Therefore, it is analyzed that the estimating standards can be classified by the number of finishes according to the site conditions by reflecting the analysis of the specification standards and site application status, and suggesting the finishing standards according to the number of plastering.