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Bayes Estimation of Reliability in the Strength-Stress Models
Yum, Joon-Keun,Kim, Jae-Joo,Cho, Sin-Sup,Park, Hong-Nai The Korean Society for Quality Management 1994 품질경영학회지 Vol.22 No.2
We obtain the Bayes estimator(BE), the minimum variance unbiased estimator(MVUE) and maximun likelihood estimator(MLE) of the reliability when the distribution of the stress and the strength are Weibull with known shape parameters. The experiment is terminated before all of the items on the test have failed and the failed items are partially replaced. Performance of the three estimators for moderate size samples are compared through Monte Carlo simulation.
( Bong Young Kim ),( Ji Eun Kim ),( Hyun Joo Pai ),( Seong Heon Wie ),( Young Kyun Cho ),( Seung Kwan Lim ),( Sang Yop Shin ),( Joon Sup Yum ),( Jin Seo Lee ),( Ki Tae Kweon ),( Hyuck Lee ),( Hee Jin 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1
For the proper antibiotics treatment, identification of pathogen and antimicrobial susceptibility results are mandatory. In Korea, there was no recommendation for microbiological evaluation of community-acquired uncomplicated acute cystitis (CA-UAC) and little microbiological data was available on CA-UAC. Therefore, clinicians have treated CA-UAC based on microbiological data of community acquired uncomplicated acute pyelonephritis (CA-UAPN). In order to evaluate the applicability of CA-UAPNs` microbiological data for CA-UACs`, the comparison of antimicrobial susceptibility test between CA-UAC and CA-UAPN was performed. During 2008, 538 CA-UACs and 1265 CA-UAPNs were collected retrospectively from 14 hospitals (UTI research group) in Korea. Microbiological data were included in 137 CA-UACs (137/538, 25.5%) and 722 CA-UAPNs (722/1265, 57.1%). Escherichia coli was the most common pathogen in both group (83.9% (115/137) in CA-UAC vs. 92.6% (661/722) in CA-UAPN). The antimicrobial susceptibility tests for E. coli between CA-UACs and CA-UAPNs were analyzed. There were significant differences in resistance rates to ampicillin and ampicillin/sulbactam (46.9% vs. 37%, p=0.047; 81.7% vs. 57.1%, p<0.0001, respectively). In conclusion, there are significant differences in ampicillin and ampicillin/sulbactam resistance rates for E. coli between CA-UAC and CA-UAPN. CA-UAC treatment based on microbiological data of CA-UAPN should be cautious and microbiological evaluation for CA-UAC should be considered for proper treatment.