I'm sure your evaluation is correct from the inspection I have made of the NITLE effort, e.g. the need for tweaking. I will follow up your links when I have a chance, and thank you for them. I didn't know that about Maciej Ceglowski. People do move on. I wish him luck (in case he is reading this or a mate of his is -:)) Any thoughts on random indexing methods (also no commercial implementation I think). But there must be a similarity to pLSI? Adam
On 13/12/05, Sebastian Marius Kirsch <[EMAIL PROTECTED]> wrote: > > On Tue, Dec 13, 2005 at 10:53:42AM +0000, adasal wrote: > > There seem to be quite a few alternatives around. I would be interested > in > > comments on the following:- > > The work at NITLE <http://www.nitle.org/tools/semantic/search.htm> > > using Contextual > > Network Search (CNS) a graph-based alternative to LSI. > > Hi, > > perhaps I can say a few words about CNS. > > I evaluated spreading activation search (which is what CNS is based > on) for my master's thesis. I must conclude that SA is a rather fickle > method -- if you read Preece's thesis, you will see that it can be > used to implement a number of retrieval algorithms and techniques. The > devil is in the details: SA depends strongly on a suitable set of > adjustments and constraints which express exactly the kind of > retrieval (or inference) algorithm you want. > > For applications of SA in Retrieval, see for example the following > publications: > > http://www.sebastian-kirsch.org/moebius/reading.html#Crestani1997a > http://www.sebastian-kirsch.org/moebius/reading.html#Crestani2000 > http://www.sebastian-kirsch.org/moebius/reading.html#Belew1989 > http://www.sebastian-kirsch.org/moebius/reading.html#Pirolli1996 > > You will notice that Crestani stresses the fact that no successful > commercial system based on SA was ever produced. I am also unaware of > any peer-reviewed publications on CNS, or follow-up publications by > NITLE. Maciej Ceglowski has since left NITLE, as far as I know. > > > So if I was you, I'd place my bet on probabilistic or linear algebra > methods like pLSI/LSI. > > If anyone wants to chime in, please feel free to comment ;) > > Regards, Sebastian > > -- > Sebastian Kirsch <[EMAIL PROTECTED]> [ > http://www.sebastian-kirsch.org/] > > NOTE: New email address! Please update your address book. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
