• Journal of Food Hygiene and Safety
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• v.7 no.1
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• pp.23-28
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• 1992

전남지방의 주요 재배단제에서 채취한 총 16종의 복숭아들에 대한 농약 잔류량 조사하였으며, 이들 복숭아를 수세 및 탈피 그리고 저장하였을 때의 농약 잔류량의 변화를 고찰하고자 하였다. 총 24종의 조사대상 농약중 TPN(Chlotothalonil) 및 Diazinon 그리고 Fenitrothion만이 3지점의 시료에서 검출되었으며 그 잔류량은 보사부에서 설정한 잔류허용기준(Maximum Residue Limits : MRL)에 크게 미달되는 수준이었다. 그러나 이들 시료들을 수세 및 탈피하지 않고 분석한 결과 TPN의 우 MRL을 훨씬 초과한 양이 검출되었는데, Diazinon은 MRL에는 미치니 못하였지만 수세 및 탈피한 시료들보다 높은 수준으로 검출되었다. 수세에 의한 복숭아중의 잔류농약의 경감효과는 TPN의 경우 63.4~66.4% 이었으며 Diazinon은 거의100% 수준이었다. 한편 탈피에 의한 잔류농약의 경감효과는 TPN 및 Diazinon 모두에서 대부분 제거되어 수세에 의한 경감보다도 훨씬 우수하다는 것을 알 수 있었다. 시료를 2주간 저장한 후 복숭아를 수세나 탈피를 하지 않거나 수세만 하여도 TPN과 Diazinon이 대부분 제거되며, 탈피를 한 경우는 별로 차이가 없었다.

• Journal of Biomedical Engineering Research
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• v.17 no.4
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• pp.525-534
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• 1996

We have developed a fast steady state free precession interferometry (SSFPI) technique which is useful for the fMRl (functional Magnetic Resonance Imaging). As is known, SSFP sequence with a suitable adjustment of Vadient (readeut) allows us to measure precession angle 6 which in tw relates to the field inhomogeneity. Combining the two pulses (known as FID and Echo) in FADE (Fast Acquisition Double Echo) sequence, for example, one can obtain the interference term which is directly related to the precession angle It has been known that a fast high resolution magnetic field mapping is possible by use of the modified FADE sequence or SSFPI, and we have attempted to use the SSFPI technique for the susceptibility-induced fMRl. When the method is applied to the susceptibility effect based functional magnetic resonance imaging (fMRl), it was found that the direct susceptibility effect measurement was possible without perturbations such as the backgrounds and inflow effect. In this paper, simulation results and experimental results obtained with 2.0 Tesla MRI system are presented.

• Proceedings of the KSPS conference
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• 2005.11a
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• pp.137-140
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• 2005

In this study we investigated the cognitive neuropsychological characteristics and the underlying mechanism in a letter-by-letter reading dyslexic patient after cerebral infarct of left posterior cerebral artery using fMRl, The results of cognitive neuropsychological assesment are visual perception was appropriate, and semantic categorization, picture naming and picture-word matching tasks were above83% correct, respectively. However, she was very poor in lexical decision task. The selective reading impairment is thought to result from the disruption of the left occipitotemporal region included fusiform gyrus. In fMRl results, the activation level increase din the right occipitotemporal region included fusiform gyrus compared with normal group in compensation for left impairment and more increased in pseudo word reading task than word reading on account of familiarity.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.06a
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• pp.197-198
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• 2022

Versatile Video Coding (VVC)는 차세대 동영상 압축 표준화 과정에서 다수의 부호화 기술을 새롭게 채택하였는데, 이중 Multiple Reference Lines (MRL)을 포함한 일부 기술은 휘도 채널에만 적용될 수 있으며 색차 성분에 대해서는 적용이 고려되지 않는다. 본 논문은 VVC 에서 휘도 채널에만 적용되는 MRL 기술을 색차 채널로 확장하기 위하여, DM(Derived Mode)을 사용하는 색차 블록의 대응 휘도 블록이 MRL 을 사용하는 경우에 해당 참조 라인을 선택적으로 공유하여 색차 블록이 화면 내 예측에 복수개의 참조 라인을 고려하여 선택할 수 있도록 하는 방법을 제안한다. 실험 결과, VVC Test Model (VTM) 15.0 대비 Cb, Cr 성분 각각 -0.09%, -0.05%의 성능 향상을 보인다.

• Research in Plant Disease
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• v.29 no.4
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• pp.405-413
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• 2023

Bacterial blight of carrot caused by Xanthomonas hortorum pv. carotae (Xhc) is one of the serious diseases of carrot, of which control measures has not been still established in the domestic farm. In this study, in order to select effective sterilizer for bacterial blight of carrots, three antibiotics such as streptomycin, oxolinic acid, kasugamycin, two copper compounds like copper hydroxide and copper sulfate basic and three rhizobacteria Burkholderia gladioli MRL408-3, Pseudomonas fluorescens TRH415-2 and Bacillus cereus KRY505-3 were selected to investigate their direct antibacterial effects using artificial media, aiming to identify effective pesticides against Xhc. Among them, treated medium with antibiotics such as streptomycin, oxolinic acid, and the antagonistic rhizobacteria MRL408-3 were formed inhibition zone. The agrochemicals and the rhizobacteria MRL408-3, which showed antibacterial effects on carrot leaves, pre-treated on the carrot leaves and then inoculated with Xhc. High control effects were shown on the carrot leaves pre-treated with both streptomycin and oxolinic acid. Scanning electron microscopy images of the carrot leaf surfaces showed that the population of bacteria decreased significantly on leaves pre-treated with streptomycin and oxolinic acid. From these results, it can be inferred that antibiotics like streptomycin and oxolinic acid exhibit superior control effects compared to other agents. This study provides valuable insights towards establishing an effective control system for bacterial blight of carrot.

• Journal of Korean Society for Quality Management
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• v.30 no.3
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• pp.195-202
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• 2002

The problem of trend change in the mean residual life is great Interest in the reliability and survival analysis. In this paper, a new test statistic for testing whether or not the mean residual life changes its trend Is developed. It is assumed that neither the change point nor the proportion at which the trend change occurs is known. The asymptotic null distribution of test statistic is established and asymptotic critical values of the asymptotic null distribution is obtained. Monte Carlo simulation is used to compare the proposed test with previously known tests.

• ETRI Journal
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• v.18 no.3
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• pp.207-213
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• 1996

This paper proposes a new nonparametric test for testing the null hypothesis that the MRL is constant against the alternative hypothesis that the MRL is decreasing (increasing) for ramdomly censored data. The proposed test statistic is a L-statistic, and we use L-statistic theory to establish its asymptotic normality of the test statistic. We discuss the efficiency loss due to censoring and also calculate the asymptotic relative efficiencies of our test statistic with respect to the Chen, Hollander and Langberg's test for several alternatives.

• Journal of Korean Society for Quality Management
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• v.30 no.4
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• pp.78-85
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• 2002

The problem of trend change in the mean residual life is great interest in the reliability and survival analysis. In this paper, a new test statistic for testing whether or not the mean residual life changes its trend is developed. It is assumed that neither the change point nor the proportion at which the trend change occurs is known. The asymptotic null distribution of test statistic is established and asymptotic critical values of the asymptotic null distribution is obtained. Monte Carlo simulation is used to compare the proposed test with previously known tests.

• Journal of Korean Society for Quality Management
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• v.22 no.3
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• pp.111-118
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• 1994

In this paper we propose a parametric and a nonparametric small sample estimators for the mean residual life (MRL) under the random censorship model using the partial moment approximation. We also compare the proposed nonparametric estimator with the well-known nonparametric MRL estimator based on Kaplan-Meier estimator of the survival function, and present the efficiency of the nonparametric method relative to the Weibull model for small samples.

• Life and Agrochemicals
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• s.269
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• pp.24-29
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• 2011