Mapping of central dopamine,noradrenaline and 5-hydroxytryptamine neurons in the central nervous system with transmitter histochemistry Evidence for the existence of central monoamine neurons.

While various special-purpose machines exist in this category (such as dedicated data base machines), the most common general-purpose examples are multiprocessors that are operated as a UNIX timesharing system, but with multiple CPUs instead of one CPU. To the outside world, a multiprocessor with 32 30-MIPS CPUs acts very much like a single 960-MIPS CPU (this is the single-system image discussed above). Except that implementing it on a multiprocessor makes life much easier, since the entire design can be centralized. The key characteristic of this class of system is the existence of a single run queue: a list of all the processes in the system that are logically unblocked and ready to run. The run queue is a data structure kept in the shared memory. As an example, consider the system of Fig. 1-11, which has three CPUs and five processes that are ready to run. All five processes are located in the shared memory, and three of them are currently executing: process A on CPU 1, process В on CPU 2, and process С on CPU 3 ...»