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Estimation of Odds Ratio in Proportional Odds Model
서민자,김주성 한국데이터정보과학회 2006 한국데이터정보과학회지 Vol.17 No.4
Although the proportional hazards model is the most common approach used for studying the relationship of event times and covariates, alternative models are needed for occasions when it does not fit data. In the two-sample case, proportional odds models are useful for fitting data whose hazard rates converge asymptotically. In this thesis, we propose a new estimator of the relative odds ratio of the proportional odds model when two independent random samples are observed under uncensorship. We prove the asymptotic normality and consistency of the estimator by using martingale-representation. The efficiency of the proposed is assessed through a simulation study.
서민자 아시아민족조형학회 2010 아시아민족조형학보 Vol.8 No.1
In Chosun period that large family should live, house is a place of complex character that the exchange of religion, education, culture and society in-cluding production activity is made as a place to accept the wide act of human beings until death after being born. So, the use of folding screen was essential for using narrow space for multipurpose use. For example, folding screen of letter drawing of filial piety and respect was essential for decorating male quarters or village schoolhouse at ordinary times. In addition, letter drawing of filial piety and respect to show so-called complex character which used gorgeous coloring by combining with drawing of flowers and birds or drawing of book etc. was important composition material for decorating banquet hall on feast days like wedding or 60th birthday anniversary. Lettering drawing of filial piety and respect of Korea didn't stop at imitating Chinese thing. But, it has been developed as one style of folk painting as our own thing which cannot be seen in China. Lettering drawing of filial piety and respect which is based on the thought of filial piety and loyalty with the development of Confucian culture was used as the method for educating the Confucian moral view of home education. And in Chosun society where the practice of courtesy etiquette was made as the aim of education, it was so-called teaching material in life which visualized moral contents with plastic method. Today, method and etiquette changed. But, lettering drawing of filial piety and respect has meaning in that basic sense of value for living humanly is taken serious view of, it has the function of society education, and drawing and letter formed creative art world with modeling.
Simple Estimation in Proportional Odds Model under Censoring
김주성,서민자,원동유 한국데이터정보과학회 2005 한국데이터정보과학회지 Vol.16 No.4
In this paper we propose a new estimator of relative odds ratio in the two-sample case of proportional odds model under censorship. Also, we show that the estimator consistent and asymptotically normal by using martingale-representation.The efficiency of the proposed is assessed through a simulation study.
Estimation in a Two-Sample Proportional Odds Model
김주성,서민자 한국데이터정보과학회 2005 한국데이터정보과학회지 Vol.16 No.2
In this paper we propose a new estimator of relative odds ratio in the two-sample case of proportional odds model. Also, we show that the estimator is consistent and asymptotically normal. The efficiency of the proposed is assessed through a simulation study.
다량 조리시 조리 방법에 따른 상용 채소류의 비타민 B_1, B_2, C 및 무기질 함량의 변화
장명숙,서민자,김나영 단국대학교 1998 論文集 Vol.32 No.-
The contents variation of vitamin B_1, B_2, C and mineral components of daily vegetables by cooking methods in the quantity food preparation was investigated. Because various nutrients change during food preparation, it is important to estimate nutrient contents of food items as served. Many kinds of daily vegetables served in the hospital during two months was analyzed for this study. 8 kinds of different cooking methods including seasoned fresh vegetables, seasoned blanched vegetables, deep-fat fried vegetables, pan fried vegetables, steamed vegetables, braised vegetables etc, were applied to 37 vegetables items. And the vegetables analyzed were classified as four groups : leafy vegetables, root vegetables, fruit vegetables, and the other vegetables As a result of this study, all of the four vegetables groups showed same tendency that most of the nutrients content were various by cooking methods in spite of same vegetable item. In the leafy vegetables group, moisture content of seasoned fresh vegetables were higher than seasoned fresh vegetables. In the root vegetables group, crude ash content among the cooked radish root showed the highest value in the seasoned fresh radish root. Vitamin B_1 contents were the highest in the seasoned fresh radish root, pan-fried onion comparing to the same vegetable cooked by any other cooking methods. Vitamin C contents had the same currency seasoned fresh radish root and Doraji, deep-fat fried onion. In the fruit vegetables, crude protein content of seasoned fresh green red pepper was the highest in the middle of cooked green red pepper. In the case of pumpkin, immature the highest vitamin B_1 content was observed in the pan-fried pumpkin, immature but that of vitamin B_2 was observed in the saute fresh pumpkin, immature. Seasoned fresh cucumber with hot pepperpaste had the highest contents in most mineral components excepting iron, respectively. Finally, the other vegetables group analysed was consist of dishes cooked with more than two kinds of vegetables or vegetables which couldn't be included in the previous classification. Therefore, the nutrients content of cooked daily vegetables acturally served in the hospital were investigated. Also, there were differences of nutrient contents by various cooking method in spite of same vegetables item under the condition for this study. Furthermore, it would be desirable that investigation about comparison of nutrient contents between quantity food preparation and home made cooking carried out.