Text this

Number:

Provider:

CAPTCHA:

__    __   _    _    _    _    __   __    ______  
\ \\ / // | || | || | || | ||  \ \\/ //  /_   _// 
 \ \/ //  | || | || | || | ||   \ ` //     | ||   
  \  //   | \\_/ || | \\_/ ||    | ||     _| ||   
   \//     \____//   \____//     |_||    /__//    
    `       `---`     `---`      `-`'    `--`

Please enter what you see:

Text this: Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass