Elf's and library security systems

[Robert Rasmussen]

My college physics degree may be getting a little rusty, but I don't believe
there is a difference between a "magnetic" field and am "electromagnetic"
field, unless by the former you mean one that is constant, not varying.

On Wed, 6 Aug 1997, Jean P. Gordon wrote:

> alison,
> 
> The only security system we were able to locate in the San Francisco Bay 
> Area that uses a magnetic field instead of an electromagnetic field is 
> now out of business.  It turned out to be a very poor system for 
> libraries, too many false alarms.  It drive the circ desk people crazy!
> 
> I did find a couple of good web sites:
> 
> http://www.nzine.co.nz/features/neilcherry.html
> 
> http://www.microwavenews.com/
> 
> Good luck
> 
> Jean Gordon
> > 
> > I am interested in hearing from anyone who considered the implications
> > of electromagnetic emmissions from electronic library security systems
> > when selecting and installing a new system.
> > 
> > Do you have any concerns? Do you know what level of EMR your staff are
> > operating in? Have you decided against system due to possible
> > implications? Design factors to limit EMR.
> > 
> > Alison Kemp
> > PO BOX 155
> > Gympie 4570
> > Queensland Australia
> > Tel: 07 54821359
> > E-mail: alikemp at tpgi.com.au
> 
> -- 
> *************************************************************
> Jean P. Gordon				  Phone: 415-257-0196
> Archbishop Alemany Library		  Fax:   415-459-2309
> Dominican College
> 50 Acacia Avenue	       E-mail: gordonjp at dominican.edu
> San Rafael, CA 94901	   Web page: http://www.dominican.edu
> *************************************************************
> 

Regards,
....Bob Rasmussen,   President,   Rasmussen Software, Inc.

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