• 응용통계연구
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• 제23권4호
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• pp.777-781
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• 2010

Yates' continuity correction of the chi-squared test for testing the homogeneity of two binomial proportions in $2{\times}2$ contingency tables is developed to lower the value of the test statistic slightly. The effect of continuity correction is expected to decrease as the sample size increases. However, in extremely unbalanced $2{\times}2$ contingency tables, we find some cases where the effect of continuity correction is eccentric and is larger than expected. In such cases, we conclude that the chi-squared test with continuity correction should not be employed as a test statistic in both asymptotic tests and exact tests.

• 사상체질의학회지
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• 제11권1호
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• pp.159-168
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• 1999

Purpose : Sasang Constitutional Medicine explains the pathology peculiar to constitution and suggests treatment for each constitution. In Sasang Constitutional Medicine hwnan beings are classified on four groups; Taeyangin, Taeumin, 5oyangin, Soeumin. These four constitution has their's own symptoms and treatments. In treatment, control of mind inclination, that is to say, moderation takes a very important role. But the study on heredity in Sasang Constitutional Medicine has not done not biological study but also statistical study. So we used several statistical methods and analyzed 163 samples. Methods : We implemented Fishers exact test for adjusting chi-squared test, kappa coefficient to estimate agreement of parent's and children's constitutions, and finally plotted bi-plot using correspondence analysis. Results : From Fisher's exact test result, we could know that parent's and children'S constitution's distribution had significant difference. In kappa coefficient, mother and daughter's estimated value produced highest result. In correspondence analysis we only plotted the case of mother and son for easy interpretation. Conclusion : In the study of heredity of SaSang constitution, we cannot know exactly the heredity of constitution in terms of biology or genetics. But this research can be helpful for further analysis, that is, a study of biological or genetical aspects. And we could conclude that in statistical aspects the heredity in SaSang constitution is meaningful.

• 한국산학기술학회논문지
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• 제20권6호
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• pp.410-420
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• 2019

본 연구는 수면 대장내시경 검진자에게 복부마사지를 시행하여 장운동 회복과 복부팽만감에 미치는 효과를 파악하기 위하여 시도된 비동등성 대조군 전후 시차설계연구이다. 연구대상자는 C시, G병원에서 외래를 통해 수면 대장내시경 검진을 받는 실험군 22명, 대조군 22명으로 자료 수집 기간은 2018년 6월 1일부터 8월 25일까지였으며, 실험의 확산효과를 막기 위하여 대조군을 먼저 자료수집 한 후 시차를 두고 실험을 실시하였다. 자료분석은 IBM SPSS 24.0을 이용하여 자료를 분석하였으며, 대상자의 일반적 특성의 동질성을 검증하기 위하여 독립표본 t-test, $x^2-test$ 와 Fisher's exact probability test, 실험군, 대조군의 복부둘레 변화량에 대한 정규성을 검증하기 위하여 Shapiro-Wilk로 검증, 복부둘레의 사전 동질성을 검증하기 위하여 Mann-Whitney U test를 실시하였다. 실험처치 효과 검증은 Fisher's exact probability test, Friedman test와 Mann-Whitney U test로 검증하였다. 연구 결과, 복부마사지가 대장내시경 검진자의 가스배출 시간($x^2=19.75$, p<.001)과 복부팽만감($x^2=29.93$, p<.001)을 감소시켜, 수면 대장내시경 검진자의 가스팽만으로 인한 불편감을 완화하는 간호중재로 활용할 수 있을 것으로 생각된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.357-359
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• 2003

This paper is for the transient analysis of instant short-circuit test equipment according to the test of tripping limits and characteristics under IEC 60947-2. The in-rush current is harmful to almost equipments and the exact testing is not made because of it. LGIS has a instant short-circuit test equipment, but it is not suitable for carrying out instant short-circuit test on ELB(Earth Leakage Circuit breaker) by reason of that. Now, I am going to show a solution for that problem. After applying this method, manufacturer is going to acquire the exact testing result according to the IEC standard. Moreover, Testing laboratory will be trusted by clients.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2003년도 추계학술발표회 논문집
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• pp.169-174
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• 2003

Design of a rational earth volume conversion coefficient is required as the earth volume conversion coefficient may give great influence on construction work volume and construction costs in the civil engineering works where large-scaled earth volume is excavated. However, there are a great deal of difficulties in the calculation of the exact spoil surface earth and Insufficient earth volume by adopting the figures presented on the generally used design specifications which are not the results obtained from the selection tests in calculating the earth volume conversion coefficient. In this connection, it would be desirable to calculate the earth volume conversion coefficient by carrying out large-scaled site test adequate for the relevant environment. In consequence, this study aims at calculating the exact earth volume conversion coefficient of cutting and banking areas of weathering rocks in large-scaled construction sites where land is being developed into home lots. For this, we have excavated the respective 20 sites of the cutting and banking areas in the said site and then calculated the volume after the excavation. As a result, the relative exactness degree of the crossing was calculated at 0.5% in average. The relative exactness degree of 0.5% in the volume may be judged as an exact measurement as it corresponds to 0.17% of the relative exactness degree in the length measurement. We have calculated the exact earth volume conversion coefficient by the use of function ratio as per the wet unit weight and the indoor soil quality test as per volume calculated. And then we have found out minor differences as a result of the comparison and analysis with the earth volume conversion coefficient determined by the dry unit weight test as per sand replacement method. This may be judged as a rational design method for the calculation of earth volume conversion coefficient, as well as high reliability of site test as a precision photogrammetry is adopted for volume measurement of the irregular excavating areas.

• 전기학회논문지
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• 제58권5호
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• pp.923-928
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• 2009

The performance analysis and robust control of the interior permanent magnet synchronous motor(IPMSM) greatly depend on accurate value of its parameters. To achieve the high performance of torque control, it is necessary to consider exact inductance values because the inductances are nonlinear parameters of operating the IPMSM. Therefore many different methods have been performed for analysis of the methodology for the exact measurement of synchronous inductances. None of them is considered standard, and accuracy levels of all these methods are also not consistent. Among these experimental methods, the DC current decay test and the vector current control test are ideal for a laboratory environment. In this paper, these two test methods are compared by applying inductances to the IPMSM. The paper analyzes the measured inductances of the two methods and their differences with inductances obtained from the finite element method(FEM).

• Restorative Dentistry and Endodontics
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• 제42권2호
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• pp.152-155
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• 2017

• 한국안광학회지
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• 제4권2호
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• pp.39-43
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• 1999

14세에서 19세까지의 중 고등학생 1750안(875명)을 대상으로 cross cylinder lens와 적 녹 검사를 이용하여 교정후 조절력검사를 실시하여 다음과 같은 결과를 얻었다. Cross cylinder lens법을 사용하여 교정후 조절력검사를 측정한 결과 0 Dptr에서는 33%의 오차범위가 나타났고 -0.25 Dptr에서는 58%로 측정되었다. -0.75 Dptr에서는 1%의 오차 범위가 측정되었고 -1.00 Dptr에서는 오차가 측정되지 않았다. Cross cylinder lends법을 이용한 정밀구면굴절력의 오차범위는 0 Dptr에서 -0.25 Dptr까지 1%에 달하는 정밀측정 오차가 발생되었다. 적 녹검사를 이용한 교정후 조절력검사는 0 Dptr에서 -.025 Dptr에서 75%의 비율이 측정되었고 -0.50 Dptr에서는 20%가 측정되었다. 이 측정결과 Cross cylinder lens를 이용한 측정이 적 녹검사측정보다 더 세밀한 측정결과를 나타내었다.

• Communications for Statistical Applications and Methods
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• 제3권2호
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• pp.197-204
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• 1996

We consider a two sample rank test for a bivariate mixture distribution based on Johnson's quantile score. The test statistic is simple to calculate and the exact distribution under the null hypothesis is obtained. A numerical example is given.

• 응용통계연구
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• 제10권2호
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• pp.339-352
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• 1997

소표본으로부터 형성되는 2원 분할표에는 빈도가 작은 칸들이 적지 않기 때문에 대표본이론에 근거한 카이제곱 검증 등 기존 통계적 방법의 적용이 적절하지 않응 수가 있다. 이런 경우에 한 대안으로서 정확검증법(exact tests)이 개발되어 있으나 이것이 너무 많은 계산을 요구하므로 사용하기가 쉽지 않다. 본 연구는 소표본 2원 분할표에서, 단순한 몬테칼로 알로리즘에 의한 행 균일성 가설의 카이제곱 임의화 검증법(randomization test)을 제안하고 튜키(Tukey) 형의 행간 다중비교법을 제안한다. 아울러 열 범주가 순서형인 2원 분할표에 대하여도 유사한 방법론을 적용할 수 있음을 밝힌다.