أرسل هذا في رسالة قصيرة: Effect of the location and size of a single crack on first fundamental frequency of a cantilever beam using fiber optic polarimetric sensors and characterisation of FBG sensors

__    __    _____     _____     _____     ______  
\ \\ / //  |  ___||  |__  //   |  ___||  /_____// 
 \ \/ //   | ||__      / //    | ||__    `____ `  
  \  //    | ||__     / //__   | ||__    /___//   
   \//     |_____||  /_____||  |_____||  `__ `    
    `      `-----`   `-----`   `-----`   /_//     
                                         `-`