• Journal of the Korean earth science society
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• v.38 no.6
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• pp.421-426
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• 2017

In this study, we selected three representative granite samples and conducted petrological observation to establish the Korean geostandards. Samples were taken from the two Jurassic (KJG-1, KJG-2) and one Cretaceous (KCG-1) granites in South Korea. The powder samples were prepared by the standard pulverization process, and glass beads were made for geochemical analysis using X-ray fluorescence (XRF) method, and finally, major element contents of the samples were acquired. The analytical data are shown with mean, standard deviation and relative standard deviation. The accuracy of the analysis was confirmed within an estimated error range of about 5% by comparing the recommended true values of the USGS and GSJ geostandards. Also, we checked the analytical precision by calculating a relative standard deviation of about 3% from the XRF analytical results for the three samples.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.5
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• pp.83-88
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• 2010

This study is going to suggest the technology to recognize a starfish by judging various starfish images. In case of recognition of single objects of the asterias amurensis, a starfish can be judged by using concave features and short line features but in case of multiple objects, it is impossible to extract the features of a starfish using concave features or short line so that it can't be recognized as a starfish. Accordingly, it is going to suggest the recognition technology using the features such as numbers of standard deviation, relative degree standard deviation and valid deviation of a long line by using the region central moment and a long line of multiple objects. As a result of experiments of the suggested technology, there were cases that recognition failed because the conditions of the standard deviation of a long line or the numbers of valid deviation of the relative degree couldn't satisfy the conditions but around 95% of a high recognition rate was shown.

• Korean Journal of Agricultural Science
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• v.32 no.2
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• pp.215-221
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• 2005

The residual study of pesticide has been used in various areas, such as food safety, environmental protection, establishment of tolerance, and explaining the pathway and reaction mode of pesticides, and its importance was expected to increase further more. The aspect of food safety, the pesticide residue survey have been practiced at many organizations, but there were no verification of analytical results at present. In this experiment, we focused on instrumental stability, including response of each instrument and the recovery ratio of each organization's method. As samples for this experiment, we prepared cucumber and sesame, and chose 4 pesticides (bifenthrin, chlorpyrifos, diazinon, and ethoprophos), which were mostly detected from pesticide residue survey and widely used for each crop. The standard deviation of peak areas in the chromatogram of each pesticide were under 1.212 %, so it showed that most instruments were stable. The relationship of recovery ratio of each organization were over 0.996 for every pesticide and each organization. Finally, the analytical results for pesticide residue from each participated organization were not statically significant and we could put confidence in the result from each organization.

• Journal of the Korean Society for Precision Engineering
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• v.11 no.2
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• pp.141-148
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• 1994

국가간에 힘 측정 또는 힘 측정기기의 교정 결과에 대한 상호 신뢰를 확보하기 위해서는 힘 표준에 대한 상호비교가 필수적이다. 본 논문에서는 한국의 힘 표준에 대한 국제적 신뢰를 확보하기 위하여 세계 여러 나라들과 힘 표준에 대한 국제비교 연구를 수행한 독일연방물리청과 힘 표준의 상호비교를 실시하였다. 비교시험 결과 한국과 독일의 힘 표준의 상대 편차는 100 kN .approx. 500 kN벙위에서 .+-. 5.5*$10^{-5}$ 이내로 나타났으며, 한국의 힘 표준의 정확도가 국제적 수준임을 확인하였다.

• Journal of Sericultural and Entomological Science
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• v.24 no.2
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• pp.85-91
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• 1983

본 보고는 1981년 국제견사협회가 불란서리온에서 개최되었을 때 제일차 보고를 기술연구분과위원회의에서 발표된 바 있는데 당시의 반응이 좋았었고 동시에 신규로 생사검사방법을 위임받은바 있는 스위스 측 대표로부터 제일차보고를 좀더 구체적으로 설명하여 달라는 요청을 받아 제이차 보고를 1982년 영국런던에서 개최된 바 있는 제15차 국제견사대회에서 재차 발표하게 되었다. 본 보고는 복잡을 피하기 위해 삼각법에 의한 이론전개 대신 XY축 직각좌표수식으로 이론을 전개하여 더욱 명확하게 이해 할 수 있도록 작성되었으며 스위스 대奈표도 이제는 확실히 알게되었다는 언급을 받게되었다. 한편 본 연구에 대한 고찰부문은 한국잠사학지 제22권 제2호 제22면을 참고하여주기 바란다. 본 연구에서 얻어진 요약은 다음과 같다. 1. 본 연구에서 생사검사결과와 그들로 만들어진 견직물 품위사이의 관계를 조사한 결과 타원형태의 이차곡선관계가 있음을 알았다. 2. 이러한 관계를 근거로 하여 생사검사등급간의 급간치를 검사항목별로 산출할 수 있는 표준벌점 parameter표를 작성하였으며 이것을 최병희 표준벌점 parameter라 명명하였고 다음과 같은 parameter가 작성 되였다. 3. 실제 생사검사 등급매기 표를 작성하는데는 다음과 같은 단계를 밟아서 이루어진다. (A) 가급적 많은 생사검사하구를 상대로 하여 E격부터 6A격에 이르기까지의 검사결과를 이용하여 각 검사항목별로 평균치와 표준편차를 정확하게 조사한다. (B) 각 검사항목에 대한 통계적 최대치와 최소치는 평균치에다 4배양의 표준편차 값을 가감하여 산출한다. (C) 각 검사항목에 대하여 통계적 개차(R)는 8배양의 표준편차로 하고 표준벌점의 산출에는 위에 제시한 parameter표 수치와 곱셈해서 얻는다. (R$\times$parameter) (D) 사조반 사조반열등 대중절 및 소절열등과 같이 백분율로 결과 표시되는 검사항목에 대하여는 최대치에서 표준벌점을 공제한 것으로 표시한다. (E) 생사섬도편차 및 최대편차와 같이 실벌점으로 표시되는 검사항목은 최소치에다 표준벌점을 가산해서 얻어진다. 4. 이상의 방법을 주요검사 항목에 한해서 반복함으로서 생사검사등급 매기표가 완성된다.

• Journal of the Korean Chemical Society
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• v.31 no.5
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• pp.425-433
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• 1987

The separation of 19 organochlorine pesticides was studied by capillary column gas chromatography. The applicability of this method to the fresh rice was investigated. Comparison of the resolution of pesticides by OV-17 and SE-30 capillary columns revealed that OV-17 column (25m ${\times}$ 0.20mm, 0.27${\mu}$m thickness) showed better resolution. The relative standard deviations (RSD) for their retention times and peak areas obtained by splitless injection mode were within 0.16% and 8.2%, respectively. The recoveries of pesticides spiked in fresh rice were mostly over 85% and their RSDS did not exceed 11.4%.

• Journal of the Korea Society of Computer and Information
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• v.10 no.6 s.38
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• pp.65-74
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• 2005

This Paper Propose a robust scene change detection technique that use the weighted chi-square test and the automated threshold-decision algorithm. The weighted chi-test can subdivide the difference values of individual color channels by calculating the color intensities according to mSC standard, and it can detect the scene change by joining the weighted color intensities to the predefined chi-test which emphasize the comparative color difference values. The automated decision algorithm uses the difference values of frame-to-frame that was obtained by the weighted chi-test. In the first step, The average of total difference value and standard deviation value is calculated and then, subtract the mean value from the each difference values. In the next step, the same process is performed on the remained difference value. The propose method is tested on various sources and in the experimental results, it is shown that the Proposed method is efficiently estimates the thresholds and reliably detects scene changes.

• Journal of the Korean Chemical Society
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• v.47 no.6
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• pp.559-568
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• 2003

A procedure based on liquid liquid extraction(LLE)-GC/MS has been developed for the simultaneous analysis of antioxidants and insecticides known as endocrine disrupters. The endocrine disrupters investigated in this study are butylated hydroxy anisole(BHA) and butylated hydroxy toluene(BHT), and the insecticides are allethrin and fenvalerate. The limit of detection(LOD) was 0.071~0.159 ng/ml with RSD of 1.41~5.34% for the standard sample. From water reservior of Han river, Geum river, Nakdong river and Sumjin river, these compounds were not detected. For the synthesized sample, the LOD is 0.051~0.132 ng/ml with RSD of 6.39~13.4%.

• Korean Journal of Food Science and Technology
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• v.28 no.6
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• pp.1177-1179
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• 1996

A static headspace gas chromatographic (HSGC) technique was used to quantify toluene and other solvents (methanol, isopropyl alcohol, methyl ethyl ketone and ethyl acetate) in food packaging films. Comparison of retention times and coefficient variations for standard solvents showed consistent retention time and good reproducibility. Therefore, this method using static HSGC proved to be superior in rapidity and reproducibility, and is thought to be adaptable to analysis of a large number of samples. The methanol content was $N.D.\;(not\;detected){\sim}0.939\;mg/m^2$, toluene $N.D.{\sim}1.403\;mg/m^2$, melthyl ethyl ketone $N.D.{\sim}0.932\;mg/m^2$, total solvent content was $N.D.{\sim}2.433\;mg/m^2$.

• Analytical Science and Technology
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• v.29 no.6
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• pp.277-282
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• 2016

British Pharmacopoeia (BP 2013), the United States Pharmacopoeia (USP 39) and the Korean Pharmacopoeia (KP XI) contain monographs for the quality control of raw diosmin using high performance liquid chromatography (HPLC). However, official monographs detailing pharmaceutical formulations for diosmin are not available in foreign pharmacopoeias. In the KP XI, ultraviolet-visible (UV-Vis) spectroscopy-which is less specific than HPLC-is reported for the testing of diosmin capsules. In this study, we present an alternative HPLC assay for such testing that is more specific than UV-Vis methods. Method validation was performed to determine linearity, precision, accuracy, system suitability, and robustness. The linearity of calibration curves in the desired concentration range was high ($r^2$>0.999), while the RSDs for intra- and inter-day precision were 0.15-0.29 % and 1.05-1.74%, respectively. Accuracies ranged from 101.2-103.2 %, while the retention time and peak area RSDs were 0.37 % and 0.06 %, respectively. Additionally, the plate number and asymmetry factor values for diosmin were 3591.293 and 1.35, respectively. Since the intermediate-precision and robustness of the assay were satisfactory, this method will be a valuable addition to the Korean Pharmacopoeia (KP XI).