Subject:
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Re: Web interface search results
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Newsgroups:
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lugnet.admin.general
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Date:
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Tue, 24 Aug 1999 16:31:26 GMT
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Reply-To:
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jsproat@io.com{NoSpam}
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Viewed:
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4065 times
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Todd Lehman wrote:
> This is an append to a thread started about 8 months ago...
> In lugnet.admin.general, Todd Lehman writes:
> > Jeremy Sproat <jsproat@geocities.com> writes:
> > > Would it be feasable to institute some kind of search language, to
> > > search for articles within a date range, within a certain newsgroup, or
> > > from a certain poster?
> > I'll need to make something that indexes all the articles by date/time
> > stamp and by poster, but it can be done.
> What I did recently as a background task was rebuilt the news search
> database from scracth, this time including article timestamps and increased
> emphasis on the poster's name.
> [...]
> The indexer now
> uses a clever and efficient encoding (space, time, and code!) mechanism to
> include crossposting information. :-)
Todd, you are a lean, mean, re-coding machine! :-, I like the date
indexing, but I haven't been able to figure out how to use it; e.g., what is
the syntax to, say, modify the query to prefer articles from about four
months ago?
> The /news/search/ page went away with the new website reorg last month, but
> it might be useful again if it came back as an advanced search page.
That'd be really cool, but take a break first. :-,
> To achieve a smooth match maching function, the fuzzy timestamp ranking
> function uses a bell-shaped curve
> y = exp(-.5 * ((delta / sigma) ^ 2)
> where 'delta' is the difference between the "target" time and a given
> article's timestamp and 'sigma' is the "time uncertainty factor." So a
> relatively large sigma produces wide time spreads around the target, and
> a small sigma produces fine time spreads. Both infinitely large and
> infinitely small sigma cause the timestamps to be a non-factor.
Whoa. All that went way over my head. It's intriguing though -- do you
have any recommendations for off-line reading on this subject? It appears
that a rudimentary understanding of statistics may also be useful...
> Welp, there you have it. Lemme know if it rocks or if it sucks.
It rocks, man. Thanks bunches! (FYI, I haven't been a welp since grade
nine... :-)
Cheers,
- jsproat
--
Jeremy H. Sproat <jsproat@io.com>
http://www.io.com/~jsproat
Darth Maul Lives
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Message has 1 Reply:
 | | Re: Web interface search results
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| (...) It appears that for now we just have the recent (default) target time and 1-week sigma values. If there is a syntax for overriding these, Todd hasn't chosen to tell us about it. I would guess that it isn't yet ready for general use. - Robert (...) (27 years ago, 24-Aug-99, to lugnet.admin.general)
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Message is in Reply To:
| | Re: Web interface search results
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| This is an append to a thread started about 8 months ago... (...) OK, Jeremy! What I did recently as a background task was rebuilt the news search database from scracth, this time including article timestamps and increased emphasis on the poster's (...) (27 years ago, 24-Aug-99, to lugnet.admin.general)
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