A microkernel implements all drivers as user-space programs, and implements core features like IPC in the kernel itself. A monolithic kernel, however, implements the drivers as a part of the kernel...
Porcelain is made with kaolin clay. Kaolin is white clay that retains its white color when fired. It is fired at temperatures in excess of 1300 C and is more fully vitrified than stoneware. It is usually covered with a clear glaze, which allows the white body to show.
Porcelain Crowns vs. Porcelain Veneers. There are several fundamental differences between porcelain crowns and veneers: Porcelain veneers are considered the less invasive, more conservative option because they only require the removal of a small portion of the tooth to apply.