28.06.2013 Views

Papers in PDF format

Papers in PDF format

Papers in PDF format

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Figure 1: A WWW3D representation of the contents of a web document.<br />

4. Brows<strong>in</strong>g the Web Us<strong>in</strong>g WWW3D<br />

When the user selects a l<strong>in</strong>k icon, WWW3D creates a new sphere represent<strong>in</strong>g the target document and places it near the<br />

document the from which the user selected the l<strong>in</strong>k. An <strong>in</strong>cremental version of the Force Directed Placement (FDP)<br />

[Fruchterman 91] algorithm is used to arrange the document sphere <strong>in</strong> 3D space. In order to <strong>in</strong>dicate the structure of the<br />

portion of the Web that the user has explored WWW3D draws arrows between the spheres represent<strong>in</strong>g l<strong>in</strong>ked<br />

documents. In addition to this the brightness of the arrow is dependant on the time s<strong>in</strong>ce the user last followed that l<strong>in</strong>k<br />

therbey provid<strong>in</strong>g the user with a visual representation of their brows<strong>in</strong>g history. As WWW3D parses a newly retrieved<br />

document is checks for l<strong>in</strong>ks to documents that the user has already explored and draws arrows to represent them. This<br />

means that at any given moment the complete set of l<strong>in</strong>ks between document is displayed without the user hav<strong>in</strong>g to<br />

follow every l<strong>in</strong>k. This is <strong>in</strong>tended to aid the user by <strong>in</strong>dicat<strong>in</strong>g l<strong>in</strong>ks between documents that the user might have been<br />

unaware of. Figure 2 shows the display produced by WWW3D after the user has browsed a number of documents. The<br />

FDP algorithm has resulted <strong>in</strong> the <strong>format</strong>ion of clusters of closely l<strong>in</strong>ked documents. The colours of the documents<br />

provide some <strong>in</strong>dication of how long ago the user last visited them.<br />

Figure 2: A collection of web documents show<strong>in</strong>g the l<strong>in</strong>ks between them.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!