the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

Background and Purpose: The identification of genetics risk factors of human diseases is very important. This study is conducted to model the allele frequencies (AFs) of Alzheimer’s disease. Materials and Methods: In this study, several candidate probability distributions are fitted on a data set of Alzheimer’s disease genetic risk factor. Unknown parameters of the considered dis...

Introduction: Cranes are of the major causes of accidents in the construction industries. As human error mostly causes crane accidents, this study aims to investigate the human errors of tower crane operators in the construction projects using SHERPA and CREAM techniques. Material and Method: In this research, first, all of the tasks of the tower crane operator were identified and analyzed. Th...

Introduction Phlebotomus papatasi, the main vector of cutaneous leishmaniasis with the agent of Leishmania major is in Iran that is widely distributed in the country. The purpose of this study was to determine the effect of climatic factors on the presence probability of a vector in some counties of Khuzestan Province. Materials and Methods In this cross-sectional study, sand flies were collec...

In this paper, using two different methods, probability of failure is calculated for three offshore platforms in Persian Gulf. In first method, uncertainties are applied as a magnification factor in calculation of failure probability, whereas in the second method these uncertainties are considered directly for uncertainty parameters. The parameters of wave height hazard curve for eight directio...