objective: in the this research, effective factors on digital libraries’ development in central libraries of public universities in tehran have been identified from these libraries administrator’s view.method: this study is applied, based on descriptive-analytical method. for data collection we used researcher-made questionnaire, based on the digital library federation definition (including hum...

in this study, displacement field around v-notches of a poly methyl metha crylate (pmma) specimen with tip cracks will be analyzed using digital image correlation technique. first intensity factor in combination with in-plane rigid body translations and rotation components will be determined by linear least squares fitting of the displacement field data to the corresponding relations among stre...