A contraction stress test (CST) is performed near the end of pregnancy to determine how well the fetus will cope with the contractions of childbirth. The aim is to induce contractions and monitor the fetus to check for heart rate abnormalities using a cardiotocograph.
If your USB drive is not being recognized by Windows, or is not formatting properly, there may be problems with either Windows or the USB drive itself. If the problem is on Windows' end, you can usually solve it by reinstalling the USB drivers.. Click. OK to start formatting the drive. This may take a while, but if the format is successful, the drive should appear in Windows. If the format process doesn't work, try the next section. 1  Formatting will delete all of the data on the USB drive.
Deleting files and directories of a CD-R using packet writing technology does not recover the space occupied by these objects but, rather, they are simply marked as being deleted (making them effectively hidden). Similarly, changes to files cause new instances to be created instead of replacing the original files. Because of this, the available space on a medium using packet writing technology will decrease every time its content is modified. For rewritable discs, however, this doesn't necessarily occur; there exists technology that allows them to be used as fully rewritable storage media (see UDF).