The computer cluster consists of 11 Compaq TRU64 UNIX workstations
(six in the front row, and five on the table in the back of the room),
and 7 Windows NT machines (six on the second row, and one on the lectern
at the front of the room). The computers are all linked together by two different
networks: the conventional LAN (Local Area Network), currently 10 BaseT,
and indicated by the red lines in the schematic below, and the baseband network
which connects the keyboards amd mice of 13 computers in the room to the CPU's of
a TEM (Philips Tecnai F20) and an SEM (Philips XL30).
This switching setup is controlled from a touchpanel mounted on the lectern
in front of the room. The teacher can select a workstation in the room and connect
its mouse and keyboard to one of the microscope CPUs. The video signal from that
microscope is then rerouted to the local monitor and to the main projection screen.
One student at a time can hence remotely operate the microscope. Note that this
baseband network exists independently of the machines in the room, so that it does
not matter which operating system (UNIX or NT) is used. No software is involved
in the remote control operation other than the touchpanel program.
For more information on this remote control setup, please contact
Marc De Graef.