http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조건호,이우동,Cho, Geon-Ho,Lee, Woo-Dong 한국데이터정보과학회 1997 한국데이터정보과학회지 Vol.8 No.2
In accelerated life tests, the failure time of an item is observed under a high stress level and based on the time, the failure rates of items we estimated at the normal stress level. In this paper, when the mean of the prior distribution of a parameter is known in Weibull lifetime model with censored failure time data, we study various estimating methods to obtain the empirical Bayes estimator of a parameter from the empirical Bayes approach under the normal stress level by considering the fact that the Bayes estimator is the function of prior parameters and of the acceleration parameter representing the effect of acceleration. And we compare the performance of several empirical Bayes estimators of a parameter in terms of the Bayes risk.
조건호,Cho, Geon-Ho 한국데이터정보과학회 1997 한국데이터정보과학회지 Vol.8 No.1
In accelerated life tests, the failure time of an item is observed under a high stress level, and based on the time the performances of items are investigated at the normal stress level. In this paper, when the mean of the prior of a failure rate is known in the exponential lifetime distribution with censored accelerated failure time data, we utilize the empirical Bayesian method by using the moment estimators in order to estimate the parameters of the prior distribution and obtain the empirical Bayesian predictive density and predictive intervals for a future observation under the normal stress level.
하일도,조건호,Ha, Il Do,Cho, Geon-Ho 한국통계학회 2015 응용통계연구 Vol.28 No.6
경쟁위험사건들은 다기관 임상시험과 같은 군집화된 임상연구에서 자주 관측되어진다. 본 논문에서는 하나의 군집으로 부터 얻어지는 경쟁위험 생존자료에 대해 공통 프레일티를 허락하는 결합 프레일티모형 접근법을 제안한다. 추론을 위해 어려운 적분 자체를 피하는 다단계 가능도를 사용하여, 대응하는 추론절차를 유도한다. 또한 실제자료 분석을 통해 제안된 방법을 예증한다. Competing-risks events are often observed in a clustered clinical study such as a multi-center clinical trial. We propose a joint modelling approach via a shared frailty term for competing risks survival data from a cluster. For the inference we use the hierarchical likelihood (or h-likelihood), which avoids an intractable integration. We derive the corresponding h-likelihood procedure. The proposed method is illustrated via the analysis of a practical data set.
이우동,조건호,Lee, Woo-Dong,Cho, Geon-Ho 한국데이터정보과학회 1996 한국데이터정보과학회지 Vol.7 No.1
In this paper, we introduce the goodness of fit test procedure for lifetime distribution using step stress accelerated lifetime data. Using the nonpapametric estimate of acceleration factor, we prove the strong consistence of empirical distribution function under null hypothesis. The critical vailues of Kolmogorov-Smirnov, Anderson-Darling, Cramer-von Mises statistics are computed when the lifetime distibution is assumed to be exponential and Weibull. The power of test statistics are compared through Monte-Cairo simulation study.
Second-Order REML for Random Effects Models
하일도,조건호,Ha, Il-Do,Cho, Geon-Ho The Korean Data and Information Science Society 2001 한국데이터정보과학회지 Vol.12 No.1
Random effects models which describe the dependence via random effects in various correlated data have recently received considerable attention in the biomedical literature. They include mixed linear models (MLMs), generatized linear mixed models (GLMMS) and hierarchical generalized linear models (HGLMs). For the inference Lee and Nelder (2000) proposed the first-and second-order REML (restricted maximum likelihood) methods based on hierarchical-likelihood of tee and Welder (1996). In this paper, for Poisson-gamma HGLMs the new methods are theoretically compared with marginal likelihood methods and both methods are illustrated by two practical examples.
하일도,이우동,조건호,Ha, Il-Do,Lee, Woo-Dong,Cho, Geon-Ho 한국데이터정보과학회 1997 한국데이터정보과학회지 Vol.8 No.2
The joint modelling of mean and dispersion in quasi-likelihood models which greatly extend the scope of generalized linear models, is required in case that the dispersion parameter, the variance component of response variables, is not constant but changes by depending on any covariates. In this paper, by using statistical package GENSTAT(release 5.3.2, 1996) which makes a easily analyze real data through this joint modelling, we mention necessities that must consider this joint modelling rather than existing mean models through model checking based on graphic methods for esterase assay data introduced by Carrol and Ruppert(1987, pp.46-47), and then study methods finding reasonable joint model of mean and dispersion for this data.
한국인에게 플라세보 이침의 적용이 가능한가? - 단일검맹과 무작위배정법을 통한 플라세보 이침의 효과 -
이경민,이세연,김성웅,하일도,조건호,박히준,정태영,서정철,한상원,Lee, Kyung-min,Lee, Se-yun,Kim, Sung-woong,Ha, Il-do,Cho, Geon-ho,Park, Hi-joon,Jung, Tae-young,Seo, Jung-chul,Han, Sang-won 대한침구의학회 2003 대한침구의학회지 Vol.20 No.2
Objective : This study was designed to find out whether placebo auricular acupuncture is able to be constituted as an appropriate control group for needle insertion to Korean. Methods : We performed a randomized controlled, single-blind study(n=48) comparing subjective evaluations of needles insertion and avoidance of needles insertion. Both ears were needled concurrently, one real acupuncture(needle insertion) and the other placebo acupuncture(avoidance of needle insertion with blunt tip). Subjects then completed a questionnaire rating the intensity of five sensations in each ear, and also attempted to identity which ear received placebo and which ear received real acupuncture. Results : As for the effects of real and placebo acupuncture on each item(Warmth, Fullness, Pain, Activity, Radiating), real acupuncture was significantly warmer, fuller, more painful than placebo acupuncture. In particular, the real acupuncture only in experienced acupuncture recipients was significantly warmer, fuller, more painful than placebo acupuncture. About the ability to differentiate real and placebo acupuncture, 54.2 percent correctly identified which ear received real acupuncture and which ear received placebo acupuncture. However, the ability to differentiate real and placebo acupuncture for naive and experienced acupuncture recipients was not significantly different. Conclusions : Most of the subjects(Korean) identified which ear received placebo and which ear received real acupuncture. We found that this placebo auricular acupuncture is not able to be applied to Korean, in particular for experienced acupuncture recipients. Further study is needed for new placebo auricular acupuncture or racial difference between American.
한국인과 중국인에서 인삼과 서양삼 복용후 전신 증상 - 이중맹검 무작위배정 임상시험 -
서정철(Jung-Chul Seo),한상원(Sang-Won Han),변준석(Joon-Seok Byun),안희덕(Hee-Duk An),하일도(Il-Do Ha),조건호(Geon-Ho Cho),임강현(Kanghyun Leem),허정걸(Zheng-Jie Heo),이경림(Jinglin Yi),김명수(Mingxiu Jin) 고려인삼학회 2005 Journal of Ginseng Research Vol.29 No.1
In East-South Asia it has been said that ginseng(Panax ginseng) induces flushing and epistaxis, whereas American ginseng(Panax quinquefolius) dosen't. This study was designed to find out if ginseng really could increase flushing and epistaxis, compared with American ginseng. Double-blind randomized controlled trials on general symptom, such as flushing and epistaxis, of ginseng and American ginseng in Koreans and Chinese were performed by questionnaire. There was no significant accident or improvement in Koreans. But in Chinese dried mouth was significantly observed in placebo group and chest discomfort was significant in placebo group and American ginseng(4 years) group. In addition in Chinese chest discomfort was significantly observed in American ginseng(4 years) group and American ginseng(6 years) group. It was revealed that ginseng might not increase flushing and epistaxis.
하일도,조건호 慶山大學校 基礎科學硏究所 1999 基礎科學 Vol.3 No.-
일반화된 지수생존모형(peneralized exponetial survival model)을 고려하여 이 모형의 모수를 추정하는 수정된 FS(modified Fisher scoring)방법을 제안한다. 이를 위해 우도방정식(likelihood equations)을 유도하고 초기추정치(initial estimate)를 포함한 추정알고리즘(estimating algorithm)을 개발한다. We consider generalized exponetial survival model and propose a modified Fisher scring method which estimates the model parameters. Also, the fitting algorithm including an initial estimate is developed.