Puzzle

Abstract

A document categorisation system, including a clusterer for generating clusters of related electronic documents based on features extracted from said documents, and a filter module for generating a filter on the basis of said clusters to categorise further documents received by said system. The system may include an editor for manually browsing and modifying the clusters. The categorisation of the documents is based on n-grams, which are used to determine significant features of the documents. The system includes a trend analyzer for determining trends of changing document categories over time, and for identifying novel clusters. The system may be implemented as a plug-in module for a spreadsheet application, providing a convenient means for one-off or ongoing analysis of text entries in a worksheet.

The claims defining the invention are as follows:  
     
         1 . A puzzle comprising a plurality of shaped modules and a retaining means for retaining the modules in an assembled arrangement, wherein the retaining means defines three mutually perpendicular axes about which the shaped modules selectively pivot to enable the puzzle to assume a plurality of configurations, wherein one of said configurations represents a solved condition such that when in that condition the puzzle has at least one axis of symmetry, and wherein the three mutually perpendicular axes intersect at a common point eccentrically located with respect to the at least one symmetrical axis of the puzzle when in its solved condition.  
     
     
         2 . A puzzle according to  claim 1  wherein the retaining means comprises three elongate elements each defining a respective one of the three axes.  
     
     
         3 . A puzzle according to  claim 2  wherein each elongate element has two opposed ends.  
     
     
         4 . A puzzle according to  claim 3  wherein each opposed end has a retaining projection extending laterally therefrom.  
     
     
         5 . A puzzle according to  claim 4  wherein each retaining projection is rotatably mounted with respect to the common point of the retaining means.  
     
     
         6 . A puzzle according to claims  4  or  5  wherein the shaped modules comprise an engaging means for engagement with the retaining projections so as to be slidably retained thereby.  
     
     
         7 . A puzzle according to  claim 6  wherein the engaging means is in the form of a protrusion from the module which is receivable within the retaining means and/or adjacent module.  
     
     
         8 . A puzzle according to  claim 7  wherein each protrusion is orientated such that it protrudes towards the common point of the retaining means when in an assembled arrangement.  
     
     
         9 . A puzzle according to any one of  claims 4  to  8  wherein each shaped module and retaining projection comprises an exterior surface adapted to provide the puzzle with a regular shape when the puzzle is in its solved condition.  
     
     
         10 . A puzzle according to  claim 9  wherein remaining surfaces of the shaped modules are interior planar surfaces.  
     
     
         11 . A puzzle according to  claim 10  wherein each interior planar surface is configured to allow rotation of the shaped modules about the common point of the retaining means.  
     
     
         12 . A puzzle according to any one of  claims 4  to  11  wherein rotation of one retaining projection induces movement of the adjacent modules.  
     
     
         13 . A puzzle according to claims  10 ,  11  or  12  wherein each retaining projection is located on one or more of the interior planar surfaces.  
     
     
         14 . A puzzle according to any one of the preceding claims wherein the exterior surface of each module bears indicia which represent a coordinated solution when the puzzle is in its solved condition.  
     
     
         15 . A puzzle according to  claim 10  wherein the indicia is in the form of a pattern and/or colours.  
     
     
         16 . A puzzle according to any one of the preceding claims comprising twenty shaped modules and one retaining means having six retaining projections.  
     
     
         17 . A puzzle according to any one of the preceding claims having a first, second and third tiers, the first and third tiers each comprising one retaining projection and eight modules, and the second tier being located between the first and third tiers and having four retaining projections and four modules.  
     
     
         18 . A puzzle as substantially herein described with reference to the drawings.