VPS-Server is an object oriented database in accordance with ODMG 2.0 standard, that grabs the data from VPS-Win, capsulates them and answers queries from object orientated clients.
VPS-Server can be installed in different ways:
- on the same PC as VPS-Win
- on a PC inside a TCP/IP-network, that has access to the VPS-Win data
- If the PC has an unique IP-address in the Internet, the VPS-Eval clients can access VPS-Server also via Internet
VPS-Eval is a client for VPS-Server. It receives queries from the user about evaluation of the data (patients, treatments, tumors, staging etc.) and pass them on to VPS-Server, without knowing the structure of the DBF-data from VPS-Win. The queries are accepted by VPS-Server and the answers returned to VPS-Eval. The user only sees the result of his query in VPS-Eval.
This mechanism has the following advantages:
- the original data from VPS-Win cannot be changed but are only read
- they cannot be damaged
- VPS-Win is not disturbed during a measurement by a simultaneous client-/server access
- several clients VPS-Eval can access simultaneously
- the network load during query is low
- VPS-Server answers queries from permitted clients independent from their location
VPS-Eval can be installed in different ways:
- on the same PC as VPS-Server
- on a PC inside a TCP/IP-network, that sees the PC with the IP-address of VPS-Server
- on a PC connected via modem and DFÜ-network with VPS-Server
- on a PC with access to the internet. The IP-address of VPS-Server must be unique.
Access security
All data transfers through the network follow the TCP/IP-protocol. The data in both directions are encoded and decoded by the symmetrical Blowfish algorithm. The user logs in with name and password in VPS-Eval. These data are checked by VPS-Server that decides if the connection will be established. Additionally VPS-Server checks by a shared key, whether the request comes from a belonging VPS-Eval.
Data evaluation
The following data can be evaluated:
- all protocols from VPS-Win, treatment protocol, daily protocol, patient list, treatment list, technical control, presettings, calibration parameters
- data, that could only be exported by VPS-Win for import in other programs, can be on-line evaluated by VPS-Eval:
- further statistical analysis is work in progress
VPS-Server and VPS-Eval are 32-Bit programs and require
- Windows 95/98 or Windows NT
- 16 MB Memory, 10 MB harddisk storage
- mouse
- colour display with at least 256 colours and 800 x 600 resolution
- 3.5" floppy drive for installation
- DIN A4 printer supported by Windows
- TCP/IP network
- if access via internet is desired, the entrances for clients and server must be available