Communications networks simulated

Article Abstract:

MIL 3's Opnet Modeler creates, executes and analyzes event-driven simulations of communication networks in a graphical environment. It is useful for communication protocol development and testing, protocol interaction analysis, and network optimization and planning. Palettes of network objects are created in the project editor, and different kinds of communication nodes and links can be assembled like tinker toys. Rings, stars, random meshes and other common network architectures can be generated automatically, and utilities are included for importing other network formats. Users can specify algorithms for generating pseudo-random traffic patterns, and real-world traffic traces can be imported from various vendor formats. Simulation results can be analyzed, and graphs and animations can be generated automatically. Process models are included for modeling border gateway protocol (BGP), TCP/IP, frame relay, Ethernet, ATM and weighted fair queuing (WFQ).

Software, Network software, Network design software, Simulation of computer systems, Opnet Modeler (Network design software)

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Quality visualization for the hierarchical data format

Article Abstract:

Fortner Software's Noesys data management software makes it easy to access large amounts of technical, multidimensional data. The package adds many fine visualization tools to the Hierarchical Data Format (HDF), and a partnership with Research Systems Inc has led to the integration of the Interactive Data Language (IDL) into Noesys. Also added to the package are new map projections, subsetting features and import/export translators that facilitate conversion of data into HDF. Simple plots of complicated multidimensional data require only a few mouse clicks after the data has been converted to the appropriate format. More complicated operations require more knowledge of IDL. The freeware HDF browser may be the best tool for learning HDF, but it is not on the CD and has to be downloaded from the company's web site. Noesys costs from $495.

Mathematical software, Research Systems Inc., Fortner Software, Noesys (Scientific software)

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