As an aside to this, but still on the (off) topic of Google.

If you are looking for technical information, and get linked to websites 
that have a question and answer section, but your answer is only available 
if you subscribe to the page, go back to the google search results, and 
check if the page has a "Cached" link - often this will drop you straight 
into the "logged in" answer page.

:)





On Mon, 23 Apr 2007 16:25:19 -0400, M. Adam Davis wrote
> Very interesting.
> 
> The google crawler doesn't use cookies, so the only way they could
> give Google access that they deny to ordinary users is by either 1)
> checking the user agent string or 2) using the IP address (or reverse
> DNS) of the crawler.
> 
> If it's just the user agent string, then it's fairly easy to spoof
> using, say, firefox or a proxy server:
> 
> http://johnbokma.com/mexit/2004/04/24/changinguseragent.html
> 
> That page also talks a bit about the cloaking that seems to be taking
> place here.
> 
> If it's the IP address, then it'll be much more difficult.
> 
> -Adam
> 
> On 4/23/07, Peter P. <plpeter2006@yahoo.com> wrote:
> > Hi all,
> >
> > I have noticed that a lot of my searches turn up links to PDF files 
which are
> > really not there. These are hosted at reputable insitutions, like 
ieee.org,
> > elsevier etc. I find that I waste quite some time bothering to look at 
the links
> > (wrongly believing that they contain what Google says they contain). 
Example:
> >
> >   http://linkinghub.elsevier.com/retrieve/pii/S0041624X05000582
> >
> > Yet, when accessing the link one gets an intro and an invitation to 
purchase. At
> > the same time, the Google link has no HTML backup for such pages. I am 
under the
> > impression that Google does not allow such tricks, and that one must pay 
to
> > allow such use. Am I wrong ? If I am wrong, how does one go about 
achieving such
> > excellent free advertising for one's pay products ?
> >
> > thanks,
> > Peter P.
> >
> > Note: The link above was the 1st on page 51 (!!) of the search with key:
> >
> >   http://www.google.com/search?
q=piezo+driver+schematic&hl=en&start=50&sa=N
> >
> > The text found by Google was:
> >
> >  "A simplified. schematic of the driver stage is shown in Fig. 4. The 
dri-. ver
> >  discharges and charges the piezoelectric disc via. transistors MN1 and 
MP1, ..."
> >
> > which is not at all on the page at the link above.
> >
> >
> > --
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> >
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