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이상현;민경원;이영철;황재승
- Proceedings of the Earthquake Engineering Society of Korea Conference
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- 2003.09a
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- pp.419-426
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- 2003
An efficient procedure using LQR method for determining optimal sliding surfaces appropriate for different controller types is provided. The parametric evaluation of the dynamic characteristics of sliding surfaces is peformed in terms of SMC controller performance of single-degree-of-freedom(SDOF) systems. The control force limit is considered in this procedure. Numerical simulations for multi-degree-of-freedom(MDOF) systems verify the effectiveness of proposed method.
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Koh, Kyung Shik;Oh, Young Hwan
- Journal of the Korean Institute of Telematics and Electronics
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- v.24 no.1
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- pp.110-114
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- 1987
It is known that digital circuits may produce correct output signals even when some faults are present in them. A reliability measure, known as signal reliability, is the probability that the circuit output is correct. In this paper, the reliability measure is analyzed first and a new procedure for evaluation of the signal reliability is presented. This procedure simplifies signal reliability calculations and can easily be mechanized.
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Ahn, Jaehyun;Kwon, Youngwoo;Lee, Jeong-Su;Choi, Weon Sang
- Journal of Food Hygiene and Safety
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- v.30 no.2
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- pp.150-158
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- 2015
This article reports the development of an effective test procedure for detection of norovirus (NoV) in foods of diverse matrices. In this study, target foods included fermented milk, soybean paste, powders made from uncooked grains and vegetables, sesame leaves preserved in soy sauce, pickled mooli, and mooli. Viral recovery varied depending on the food matrices or elution buffers tested. Buffers were compared to determine effective elution buffers from artificially virus-contaminated foods. The conventional test procedure for concentrating viruses from food (elution-polyethylene glycol(PEG) precipitation-chloroform-PEG precipitation) was modified to save time by eliminating one PEG precipitation step. The modified procedure (elution-chloroform-PEG precipitation) was able to concentrate viruses more effectively than the conventional procedure. It also removed RT-PCR inhibitors effectively. The modified procedure was applied to target food for genogroup II NoV detection. NoV RNA was detected at the initial inoculum levels 3.125-12.5 RT-PCR units per 10-25 g tested food. The use of this newly established procedure should facilitate detection of low levels of norovirus in diverse foods.
https://doi.org/10.13103/JFHS.2015.30.2.150 인용 PDF KSCI

Kim, Jin-Koo;Park, Sae-Ro-Mi;Seo, Young-Il
- Journal of the Computational Structural Engineering Institute of Korea
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- v.24 no.5
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- pp.569-576
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- 2011
In this paper a new analysis procedure for evaluation of progressive collapse resisting capacity of a structure was proposed based on the nonlinear static analysis procedure. The proposed procedure produces analysis results identical to those obtained by the linear static analysis procedure specified in the GSA guidelines without iteration, therefore saving a lot of computation time and excluding the possibility of human errors during the procedure. To verify the validity of the proposed procedure, the two methods were applied to the analysis of a reinforced concrete moment frame and a steel braced frame subjected to loss of a first story column and the results were compared. According to the analysis results, the two methods produce identical results in the prediction of progressive collapse and the hinge formation. As iterative analysis is not required in the proposed method, significant amount of analysis time is saved in the proposed analysis procedure.
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