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Academic Assessment

May 11, 2016

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Dentistry questions & answers

Which criteria should one look at when purchasing an electric toothbrush? From the medical perspective, the main outcome of using an electric toothbrush is if is capable to avoid, control or reduce two main dental diseases: periodontal and/or caries. Such kind of trials are costly in time and resources, hence manufacturers and researchers use some surrogate outcomes as dental plaque reduction for caries/periodontal and gingivitis reduction for periodontal disease. From the mode of action, powered toothbrushes can be classified as follow ( source ) : Side to side action, indicates a brush head action that moves laterally from side to side. Counter oscillation, indicates a brush action in which adjacent tufts of bristles (usually six to 10 in number) rotate in one direction and then the other, independently. Each tuft rotating in the opposite direction to that adjacent to it. Rotation oscillation, indicates a brush action in which the brush head rotates in one direction a

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How to fix the kernelstub.Drive : ERROR Could not find a block device for the a partition. This is a critical error and we cannot continue AND Can't update kernel and initramfs in pop_os

This applies to computers with NVMe disks For some reason, at one point my pop_os stopped working and updating as expected. The following error appeared: kernelstub.Drive : ERROR Could not find a block device for the a partition. This is a critical error and we cannot continue. The source of the problem is that pop_os has at least four partitions: /boot/efi , /recovery, / and swap . The problem is that the /boot/efi partition is not mounted. To fix it you should look for the identification of the boot/efi partition From a terminal, run: lsblk -f You should see something like this: and you will see NOT MOUNTED the /boot/efi, so that should be blank. To fix this, edit the fstab as follows sudo gedit /etc/fstab and add this line # new for efi PARTUUID= <copy here your UUID of the nvme0n1p1> /boot/efi vfat umask=0077 0 0 save, close and mount sudo mount -a or restart, and that is, fixed!

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