• Analytical Science and Technology
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• v.7 no.4
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• pp.541-545
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• 1994

The pungent principles of 20 Korean red peppers(Capsicum spp.) were analyzed by high performance liquid chromatography(HPLC) method. Capsaicinoids levels were considerable from 7.0mg/100g to 75.9mg/100g in Korean red peppers. The index value of the variety, ratio of capsaicin to dihydrocapsaicin was 0.8~1.1. This fact reveals that several varities of red pepper have existed in Korean. The sensory intensity of pungent principles was completely accordant with instrumental analysis result until 10ppm of capsaicinoids. The acceptance concentration of pungent principles was from 7.8ppm to 15.6ppm in Korean people.

• Korean Journal of Oriental Medicine
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• v.17 no.2
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• pp.135-167
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• 2011

Objective : To establish the fundament for EBM of Traditional Korean Medicine, the papers on Bojungikgitang(Buzhongyiqi-tang) frequently used in medical institutions of Traditional Korean Medicine were analyzed through researching domestic and international papers. Methods : The papers were classified by the registration of domestic or international journals, the year of publishment, experimental fields and the kinds of studies on biological activities. Results : Among 2005 volumes of papers on Bojungikgi-tang(Buzhongyiqi-tang), 219 volumes were selected according to selective criteria. 71 volumes were published in domestic journals, 52 volumes were in Chinese journal, 96 volumes were in Japanese journal. The papers on instrumental analyses reported the quantification of standard compounds of herbal medicines in Bojungikgi-tang(Buzhongyiqi-tang) using HPLC method. The papers on biological activities of Bojungikgi-tang(Buzhongyiqi-tang) showed mainly immune regulation, anti-infection, anti-cancer, gastrointestinal activity, neuropsychiatric regulation, anti-inflammation, hepatoprotection, musculoskeletal regulation. Among biological activities, papers on immume regulation were reported mostly. Conclusions : The efficacy of Bojungikgi-tang(Buzhongyiqi-tang) could be related to immune regulation, gastrointestinal activity, anti-fatigue and further study need to be preceeded to establish the fundament for EBM of Bojungikgitang(Buzhongyiqi-tang).

• Nuclear Engineering and Technology
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• v.49 no.3
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• pp.562-568
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• 2017

Background: The chemical characterization of metallic alloys and oxides is conventionally carried out by wet chemical analytical methods and/or instrumental methods. Instrumental neutron activation analysis (INAA) is capable of analyzing samples nondestructively. As a part of a chemical quality control exercise, Zircaloys 2 and 4, nimonic alloy, and zirconium oxide samples were analyzed by two INAA methods. The samples of alloys and oxides were also analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) and direct current Arc OES methods, respectively, for quality assurance purposes. The samples are important in various fields including nuclear technology. Methods: Samples were neutron irradiated using nuclear reactors, and the radioactive assay was carried out using high-resolution gamma-ray spectrometry. Major to trace mass fractions were determined using both relative and internal monostandard (IM) NAA methods as well as OES methods. Results: In the case of alloys, compositional analyses as well as concentrations of some trace elements were determined, whereas in the case of zirconium oxides, six trace elements were determined. For method validation, British Chemical Standard (BCS)-certified reference material 310/1 (a nimonic alloy) was analyzed using both relative INAA and IM-NAA methods. Conclusion: The results showed that IM-NAA and relative INAA methods can be used for nondestructive chemical quality control of alloys and oxide samples.

• Analytical Science and Technology
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• v.22 no.1
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• pp.82-91
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• 2009

Preparation and evaluation of the limestone samples for a proficiency test using domestic limestone have been performed. We have used statistical method for evaluation of the XRF and instrumental analysis results. We have found that there were some outliers from XRF and ICP-OES instrumental analysis results for each sample. After removal of 5 outliers among the 50 samples we could obtain the homogeneous samples which have within a reliability of 95% from a statistical analysis result.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10b
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• pp.1-6
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• 1993

This report proposes a novel method of identification of continuous time-delay systems from sampled input-output data. By the aid of a digital pre-filter, an approximated discrete-time estimation model is first derived, in which the system parameters remain in their original form and the time delay need not be an integral multiple of th sampling period. Then an identification method combining the common linear least squares(LS) method or the instrumental variable(IV) method with the genetic algorithm(GA) is proposed. That is, the time-delay is selected by the GA, and the system parameters are estimated by the LS or IV method. Furthermore, the proposed method is extended to the case of multi-input multi-output systems where the time-delays in the individual input channels may differ each other. Simulation resutls show that our method yields consistent estimates even in the presence of high measurement noises.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1768-1769
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• 2011

The nonlinear estimation and the pseudo-linear estimation are used to treat the target localization in sensor network which provides range difference of arrival (RDOA) measurements. It is known that the nonlinear estimation has sensitive problem for the initial estimate and the pseudo-linear estimation has a large estimation error. The QCLS method is the typical estimator of the methods for pseudo-linear estimation. However the estimate by using the QCLS method includes the estimation error because the first stage of two estimation processes of the QCLS method causes the biased estimation error. Therefore we propose a instrumental variables(IV) method for minimizing the estimation error of the first stage. The simulation shows that the performance of the proposed method is superior to the QCLS method.

• Journal of the Korean housing association
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• v.5 no.1
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• pp.71-84
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• 1994

This article tries to develop an instrument for assessing the quality of housing environment by using 67 housing environment variables. The method of factor analysis is used to explore the dimension of the quality of housing. As the result, 5 dimensions of housing environment are extracted. They are, according to the order of their importances, house structure and indoor environment, outdoor facilities and natural environment, indoor facilities and economy, public facilities and social relationship, and convenient facilities and residential feasibility.

• MALSORI
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• no.40
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• pp.65-78
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• 2000

Korean learners of Chinese have diniculties in pronouncing Chinese tones which distinguish the meaning of words, because there are not such tones in Korean language. It makes Koreans hard to acquire Chinese. In this paper, I present the followings: First, I examine the characteristics of the tones pronounced by Korean speakers, exploiting the method of modern experimental phonetics. Second, I present the pedagogy of Chinese tones, considering the typical errors shown by the experiments on Korean speakers. The Pedagogy Presented in this Paper, which is based on the results of experiments, is not perfect. However, I expect this paper to serve as instrumental tools to help Korean speakers to improve their command of Chinese.

• 제어로봇시스템학회:학술대회논문집
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• 1987.10b
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• pp.214-217
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• 1987

In this paper self tuning control of interconnected systems are dealt in view point of large scale system control. The plant model is given in multiple ARMA process. This process is simplified as independent SISO ARMA process having offset terms. This offset was considered as effects of interconnections. In each decentralized system, self tuning controller with instrumental variable method is adopted. As a result, this algorithm enables the parameter estimation to be unbiased and non-drift. This controller contains a new implicit offset rejection technique. Simulation results considers well with the analysis in case of linear interconnection.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.37 no.12
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• pp.879-883
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• 1988

In this paper, self tuning control of interconnected systems are dealt in view point of large scale system control. The plant model is given in MIMO ARMA procss. This process is simlified as independent SISO ARMA processes having offset terma, which are considered as effects of interconnections. In each decentralized system, self tuning controller with instrumental variable method is adopted. As a result, this algorithm enables the paramter estimation to be unbiased and non-drift. This controller contains a new implicit offset rejection technique. Simulation results consider well with the analysis in case of linear interconnection.