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...
The main difference between porcelain and fine bone china is the inclusion of up to 50 percent bone ash in the porcelain mixture that makes up bone china. China is also typically fired at a lower temperature than porcelain, which is double-fired at very high temperatures. Keep Learning.
These numbers can oftentimes help to identify the manufacturer and date. To tell the difference between porcelain and pottery (aside from the translucency test) run your finger over the unglazed footrim or bottom of the item, if it is porcelain it should have a glassy feel and be white in color.