there are two major theories of measurement in psychometrics: classical test theory (ctt) and item-response theory (irt). despite its widespread and long use, ctt has a number of shortcomings, which make it problematic to be used for practical and theoretical purposes. irt tries to solve these shortcomings, and provide better and more dependable answers. one of the applications of irt is the as...

seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...

This study is practical and its purpose was to present a model based on examining the relationships between three variables: employee performance indicators, human error and employee evaluation methods, respecting the mediating role of methods in the oil refining industry. 281of 1050 official employees of the refining industry were selected by Morgn table for main model and 140 of 220 employees...