• The Korean Journal of Applied Statistics
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• v.19 no.1
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• pp.81-96
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• 2006

This paper proposes a simple control chart method which can be practically used for asymmetric process data where the distribution is unknown. If we use the Shewhart type control charts which are based on normality assumption for the asymmetric process data, the type I error could increase as the asymmetry increases and the effectiveness of control chart to control variation decreases. To solve such problems, this paper suggests to calculate the control limits based on the quartiles. If we obtain the control limits by such quartile method, the type I error could decrease and it looks much more practical for asymmetric distributed process data.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2009.02a
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• pp.3-12
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• 2009

특허맵 (Patent Map, 특허동향조사)이란 특정 기술분야에 대한 국내외 특허출원 및 등록현황에 대한 자료를 여러 기준으로 상세하게 분석한 후, 이를 사용목적에 맞게 가공하여 이해하기 쉽게 작성한 자료로 기술의 추이와 특허동향이나 현황을 쉽게 파악할 수 있도록 도표, 기호, 그림 등 다양한 형태로 표현한 것이다. 연구자나 기업들의 R&D와 사업은 연구나 사업의 실패 확률을 줄이기 위해 특허맵, 특허동향조사를 필수적으로 활용한다. 특허동향조사를 활용함으로써 다음의 이점을 제공받을 수 있는데, 즉 연구개발방향의 설정에 활용할 수 있고, 중복연구 및 특허분쟁을 미연에 방지할 수 있다. 또한, 경쟁자의 동향을 용이하게 파악할 수 있으며, 기술개발 추이를 파악하여 미래예측이 가능하다. 이러한 활용을 통해 연구개발 예산을 효율적으로 사용할 수 있게 된다. 또한, 특허맵이나 특허동향조사가 활용되는 시점은 연구기획단계에서부터, 연구개발단계, 비즈니스단계 및 특허소송에 이르기까지 전 과정, 즉 R&D부터 그 활용단계에까지 필수적으로 필요한 도구(tool)라 할 것이다. 본 발표에서는 줄기세포분야에 대한 국내외 특허동향을 조사해 보았다. 국내에서는 2000년 이후부터 관련 기술의 급격한 출원을 보이고 있으며, 서울대, 고려대, 제론, 위스콘신 등 국내외 대학이 주요 출원이었다. 또한, 출원현황을 통한 국내 연구 분야의 활성도는 성체줄기세포가 배아줄기세포에 비하여 월등히 앞서 있음을 파악할 수 있다. 특히, 역분화와 관련된 기술도 국내에 약 10건 정도가 검색되었으며 주로 해외 출원인이 주를 이루고 있다. 해외의 경우, 약 6,800여 건을 검색하였으며 미국에서의 출원이 가장 두드러지고 있다. 특허출원의 추이는 국내와 유사하게 2000년 이후에 급격히 증가되었으며 국내보다 2년 앞선 2004년에 최고의 출원량을 보이고 있다. 주요 출원인으로는 OLYMPUS, GENRO, OSIRIS, JAPAN SCIENCE & TECHNOLOGY, ACT, SYSTEMIX 등의 순서임을 확인할 수 있었다.

• Journal of Advanced Navigation Technology
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• v.22 no.2
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• pp.163-167
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• 2018

Probabilistic approach is applied to the experiment of Probability Density Function to get the information. Especially this method will be useful to make the montage to compare similarity. But in the case of art painting, it is more difficult than montage image. In this case, we should study the habit of painter with characteristic point in the paintings. Especially we will study characteristic point in the oil paintings to decide truth or falsehood in this paper.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.677-682
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• 2015

In this paper, we investigated the effect of light on the performance of the receiver system noise and external noise added from the ever-present influence in general optical system. And calculated the reception sensitivity of the receiver at the time of off-keying transmission - from the optical transmission system in consideration of the case that the photo detector has a quantum yield of less than one-one. Not less than 50 it was confirmed that it is possible to configure the low power system is calculated and compared with the case where less than 300 the receiver sensitivity of the optical system to maintain the standard error probability. However, even if these values were considered, and the preamplifier in the receiver, considering a case of using a low-output light source, so that a heavy burden in the value less than the actual system installation, using the light source having less than the output, as shown in Figure 3, the results that were obtained also may be used.

• Journal of the Korean Data and Information Science Society
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• v.28 no.1
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• pp.87-98
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• 2017

The multivaiate empirical distribution function (MEDF) is defined in this work. The MEDF's expectation and variance are derived and we have shown the MEDF converges to its real distribution function. Based on random samples from bivariate standard normal distribution with various correlation coefficients, we also obtain MEDFs and propose two kinds of graphical methods to visualize MEDFs on two dimensional plane. One is represented with at most n stairs with similar arguments as the step function, and the other is described with at most n curves which look like bivariate quantile vector. Even though these two descriptive methods could be expressed with three dimensional space, two dimensional representation is obtained with ease and it is enough to explain characteristics of bivariate distribution functions. Hence, it is possible to visualize trivariate empirical distribution functions with three dimensional quantile vectors. With bivariate and four variate illustrative examples, the proposed MEDFs descriptive plots are obtained and explored.

• Communications of Mathematical Education
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• v.37 no.3
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• pp.329-348
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• 2023

This study is necessary for the stable settlement of the 2022 revised mathematics curriculum 'data and possibility' area. This study was conducted centering on literature analysis. The purpose of this study is to realize statistics education in line with the 2022 revised mathematics curriculum. This purpose was achieved by examining the statistics learning contents of the 2022 revised curriculum, analyzing Chinese mathematics curriculum, and analyzing Chinese mathematics textbooks. In this study, the following studies were conducted. First, five elements were extracted through the analysis of the 'statistics and probability' area of the Chinese mathematics curriculum. The extracted elements are the 4th grade goals, synthesis and practice content areas, achievement standards for statistics and probability (6), (9), and (11). Second, examples presented in Chinese mathematics textbooks and Chinese curriculum appendices related to the extracted elements were analyzed. Regarding the 4th grade goal, the statistical problem-solving process of the 7th grade 2nd semester mathematics textbook was analyzed. Regarding the synthesis and practice content area, the data analysis unit of the 8th grade 2nd semester mathematics textbook was analyzed. In relation to the achievement standard (6), Example 85 of the curriculum appendix was analyzed, in relation to the achievement standard (9), Example 86 was analyzed, and in relation to the achievement standard (11), Example 87 was analyzed. Third, based on the analysis results, implications for the development of new curriculum and 'textbook development, teaching and learning methods' according to the 2022 revised middle school mathematics curriculum were derived. Through the results of this study, we expect the successful realization of the 2022 revised middle school mathematics and curriculum statistics education.