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**'''DREAM CASE''':
***Could we use this modelling technique to predict future twitter trends of a the entrepreneurship interest group?
==Famous Classic Modelling Tools==
PAJEK and UCINET are two of the most widely-used modelling toolkits on the internet. They are both blackboxes with a GUI, but also portable in the sense that their output can be '''easily converted for further analysis in MSExcel, SPSS and R'''
===PAJEK===
*Open-source, free and has been the recipient of numerous software awards. Numerous books have been written about this tool.
*Most obvious advantage being:
##Scale-ability - ''handles a billion vertices (more than we will ever need)''
##Speed - ''recent release of PAJEK XXL reduced processing time for 2 or 3 times''
##Algorithms - ''handles classic algorithmic operations such as the shortest-path problem''
##Decomposition - ''(recursive) decomposition of a large network into several smaller networks that can be treated further using more sophisticated methods''
*Unlike other OOP's, Pajek has some very unique datatypes
<blockquote>network (graph); partition (nominal or ordinal properties of vertices); vector (numerical properties of vertices); cluster (subset of vertices); permutation (reordering of vertices, ordinal properties); and hierarchy (general tree structure on vertices)</blockquote>
*Powerful graph theory operations
[[File:Capture 30.PNG|600px|none]]
*Unique network models
**Temporal networks - '''''networks that change over time'''''
**Multirelational networks - '''''different set of relations imposed on the same set of vertices'''''
**Signed networks - '''''networks with positive and negative lines'''''
*Powerful visualization support
<blockquote>Kamada-Kawai optimization, Fruchterman Reingold optimization, VOS mapping, Pivot MDS, drawing in layers, FishEye transformation. Layouts obtained by Pajek can be exported to different 2D or 3D output formats (e.g., SVG, EPS, X3D, VOSViewer, Mage,…). Special viewers and editors for these formats are available (e.g., inkscape, GSView, instantreality, KiNG,…)</blockquote>
