The shift of reflective wavelength of one FBG under external strain is translated into a change in time interval of the optical pulse from another FBG drived by a PZT plate.

To alleviate the strain that could result in system overloads, you should, for example, clean up unwanted files or plug in an external USB disk drive to store and run your larger Ajax applications.

An important characteristic of instability failure of coal and rock which is subjected to external loadings is that its deformation possesses property of strain softening.