Search for dissertations about: "Hans Öhman"
Showing result 1 - 5 of 8 swedish dissertations containing the words Hans Öhman.
-
1. Studies on the pH gradient in normal and ichthyotic human skin
Abstract : In search for pathogenetic mechanisms underlying hyperkeratosis, we examined the pH gradient across the stratum corneum in normal and ichthyotic skin. Twenty students and employees, (12 men and 8 womenaged 25-69 years) served as controls. Patients with ichthyoses were recruited from the outpatient clinic (13 men aged 12-71 years). READ MORE
-
2. Contributions to generalized Wilcoxon rank tests
Abstract : In unbalanced small sample size problems with right censorings, the variance estmators of linear rank statistics, may be biased. This is the case with the commonly applied variance estimators for the generalized Wilcoxon rank test statistics of Gehan and Prentice. READ MORE
-
3. Aspects of analysis of small-sample right censored data using generalized Wilcoxon rank tests
Abstract : The estimated bias and variance of commonly applied and jackknife variance estimators and observed significance level and power of standardised generalized Wilcoxon linear rank sum test statistics and tests, respectively, of Gehan and Prentice are compared in a Monte Carlo simulation study. The variance estimators are the permutational-, the conditional permutational- and the jackknife variance estimators of the test statistic of Gehan, and the asymptotic- and the jackknife variance estimators of the test statistic of Prentice. READ MORE
-
4. Women's experiences and reactions when a fetal malformation is detected by ultrasound examination
Abstract : Background: Second trimester ultrasound examination among pregnant women in Sweden is almost universal. The detection of a fetal malformation on ultrasound puts health care providers and pregnant women in a difficult and precarious situation. READ MORE
-
5. In the mind of the property appraiser : Studies of commercial property valuation
Abstract : A transparent market provides participants with as much information as possible. In Sweden, where the environment of commercial properties is highly transparent various actors still need to minimise some continuing information asymmetry, and one possibility is to hire property appraisers. READ MORE