purpose: to determine the outcomes of visual correction with femto-lasik following pk. methods: in this prospective study, 34 eyes of 31 patient who had undergone thin – flap lasik due to high refractive error after corneal grafting were evaluated .after complete ocular examination and assessment of uncorrected and corrected distant visual acuity (ucva and bcva) , the patients underwent femto-l...

human errors are one of the most important causes of accidents. because time limitation is the most effecting factor in human errors, the likelihood of these errors in emergencies’ is higher than normal conditions. this study was aimed to manage and evaluate human errors in a case of fire in a manufacturing company. in this study human error prediction index (hepi) was used in order to evaluate...

pavement design using mechanistic-empirical methods is often carried out based on the some assumptions for pavement layer's properties (thickness, elastic modulus, poisson's ratio and ….), loading properties(axial weight, tire coordinates, number of repetitions and …) and also the failure mechanism for different materials. fulfillment of these assumptions for evolution of pavement performance d...