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우정수,권순영,정광윤,김인선 대한의학회 2004 Journal of Korean medical science Vol.19 No.3
Hybrid carcinoma of the salivary gland is a very rare entity that has been described only in the parotid and palate. The occurrence of a hybrid carcinoma of maxillary sinus has not been reported. The diagnosis of hybrid carcinoma is important partic-ularly when the components of tumor have different biologic behaviors. Diagnosis and treatment require a high index of suspicion, especially when the tumor is an epithelial-myoepithelial carcinoma, pathological effort to look for a more aggressive accompanying tumor, and proper oncologic treatment. We describe a case of 26-yr-old woman with a hybrid carcinoma composed of epithelial-myoepithelial carcinoma with an adenoid cystic carcinoma component (cribriform pattern) in the right maxillary sinus with a brief review of the relevant literature.
Notes on the Ratio and the Right-Tail Probability in a Log-Laplace Distribution
우정수 한국데이터정보과학회 2007 한국데이터정보과학회지 Vol.18 No.4
We consider estimation of the right-tail probability in a log-Laplace random variable, As we derive the density of ratio of two independent log-Laplace random variables, the k-th moment of the ratio is represented by a special mathematical function. and hence variance of the ratio can be represented by a psi-function.
On Approximate Maximum Likelihood Estimation in a Log-Logistic Distribution
우정수,김중대 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.1
We derive some properties of a log-logistic distribution, its k-th moment, and the densities of product and quotient of two independent identical log-logistic distributions. And we compare simulated mean squared errors of an approximate maximum likelihood estimator(AML) and moment estimator of a parameter in the log-logistic distribution.
우정수,Woo, Jeong-Sao 대한기관식도과학회 2010 大韓氣管食道科學會誌 Vol.16 No.2
The pathophysiology of Gastroesophageal reflux disease (GERD) has been known that it is developed when the offense-primarily the gastric acid-pepsin content of the refluxate-overcomes a 3-tiered esophageal protective defense. consisting of antireflux mechanisms, luminal clearance mechanisms, and tissue resistance. Laryngopharyngeal reflux (LPR), which is known as an extraesophageal variant of GERD, has been considered to be developed by transient lower esophageal sphincter relaxation (TLESR), direct mucosal injury by gastric contents, more sensitive mucosa compared to esophagus, and absence of buffering effect and aggravation of the injury due to pepsin. However, hypothesis of the pathophysiology in both entities are numerous and still lack of understanding for being a theory. There is no conflict that understanding the pathophysiology is necessary for resolving the problems of these diseases and numerous studies and results have been releasing. This review could provide clinicians dealing with GERD and LPR with applicable new information and help for overcoming the clinical obstruction.
On Reliability and UMVUE of Right-Tail Probability in a Half-Normal Variable
우정수 한국데이터정보과학회 2007 한국데이터정보과학회지 Vol.18 No.1
We consider parametric estimation in a half-normal variable and a UMVUE of its right-tail probability. Also we consider estimation of reliability in two independent half-normal variables, and derive k-th moment of ratio of two same variables.
Reliability in two Independent Levy andUniform-Exponential Distribution
우정수 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.2
We consider estimation of reliability P(Y<X) when X and Y are independent Levy random variable and uniform random variable, respectively, and also consider the estimation problem when X and Y are two different independent Levy random variable and exponential random variable, respectively.
Reliability In a Half-Triangle Distribution and a Skew-Symmetric Distribution
우정수 한국데이터정보과학회 2007 한국데이터정보과학회지 Vol.18 No.2
We consider estimation of the right-tail probability in a half-triangle distribution, and also consider inference on reliability, and derive the k-th moment of ratio of two independent half-triangle distributions with different supports. As we define a skew-symmetric random variable from a symmetric triangle distribution about origin, we derive its k-th moment.
Estimating Reliability and Distribution of Ratio in two independent Different Variates
우정수 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.3
We consider densities of quotient Y/X and ratio X/(X+Y), and estimation of reliability P(Y<X) when X and Y are independent p-dimensional Rayleigh random variable and uniform random variable, respectively, and also consider the quotient and ratio densities, and the estimation problem when X and Y are two different independent p-dimensional Rayleigh random variable and Rayleigh random variable, respectively.
The UMVUE and MLE of the Tail Probability in Discrete Model
우정수 한국데이터정보과학회 2006 한국데이터정보과학회지 Vol.17 No.4
We shall derive the UMVUE of the tail probability in Poisson, Binomial, and negative Binomial distributions, and compare means squared errors of the UMVUE and the MLE of the tail probability in each case.
누리리포트 - 두 마리 토끼, 그리고 더… 대성실업 기업탐방기
우정수,U, Jeong-Su 축산물품질평가원 2018 KAPE누리 Vol.263 No.-
원료육을 보다 낮은 가격에 공급 받으려는 육가공 업체들과 힘들게 키운 가축을 조금이라도 높은 가격에 넘기고픈 생산 농가들의 이해관계가 얽혀 있는 우리 축산업계에서 농가와의 강한 신뢰 관계를 바탕으로 농가 소득 향상, 업체 손실 비용 절감 등 두 마리 토끼를 잡은 업체가 있어 눈길을 끌고 있다. 국내산 돈육 브랜드인 '12 정품'을 생산 유통 중인 '대성실업(충주시 소재)'이다. 수익은 물론 안정적인 관계 유지 등 내 외실을 탄탄히 다지고 있는 업체는 축산 관계자라면 한 번쯤 관심을 기울여 봄 직하다. 이에 누리리포트를 통해 김영숙 대성실업 대표를 만나 자세한 이야기를 들어봤다.