[LINK] RFID in Govt, and in People

Kim Holburn kim at holburn.net
Tue Oct 3 15:45:29 AEST 2006

I'm sorry, this doesn't make sense to me.  If you are talking about a  
non-changing magnetic field then it can't transmit energy to a remote  
device (however close the device is).

If you are talking about a changing magnetic field then you are  
talking about an electromagnetic field.  Any kind of moving magnetic  
field / electromagnetic field can be subject to beam forming.

Just because no-one has done it yet, that you know of, doesn't mean  
it can't be done.

On 2006 Oct 03, at 1:24 PM, Geoff Ramadan wrote:

> RFID/Inductive coupling does not propogate waves. It uses magnetic  
> coupling, so  it is a closed loop. i.e. it is not like a radio  
> transmitter, its like a transformer.
> Kim Holburn wrote:
>> On 2006 Oct 03, at 1:09 PM, Geoff Ramadan wrote:
>>> On my brief skimming, the articles make no mention of "magnetic"  
>>> beam forming. They are all referring to "beam-forming" in the  
>>> "far-field" EM waves or "wave cancellation".
>> The last link was about audio beam forming; beam forming can be  
>> done with any wave forms.
>>> Library RFID systems use 13.56Mhz RFID technology. "Near-Field"  
>>> or "inductive technology".
>>> I don't know how how this translates.
>>> A traditional "magnetic" beam-former would need to use some form  
>>> of "magnetic conductive"  medium like ferrites, (the stuff that  
>>> transformers and inductors use).
>> I assume RFID tags are powered by some kind of low frequency  
>> electromagnetic waves?  You would just need a grid of things to  
>> produce a moving magnetic field like say electromagnets and  
>> software of course.
>>> Reg
>>> Geoffrey Ramadan
>>> Kim Holburn wrote:
>>>> On 2006 Oct 03, at 12:36 PM, Geoff Ramadan wrote:
>>>>> Kim
>>>>> Libraries are already using RFID for books and security. Though  
>>>>> not in the way you described. A reader is either at the Counter  
>>>>> or is in a "self check-out" systems.
>>>>> check out.
>>>>> http://www.dalibtech.com/
>>>>> http://www.adelaidecitycouncil.com/Libraries/Structure/About/ 
>>>>> TheCentre.aspx
>>>>> I assume you are joking about the clandestine reading?
>>>> Not really, a flight of fancy more like.  With a directed  
>>>> magnetic beam former and an rfid reader it wouldn't be too hard.
>>>> It's hard to find non-technical stuff on beam-formers:
>>>> http://www.embedded.com/showArticle.jhtml?articleID=60401726
>>>> http://adsabs.harvard.edu/abs/1990IPRSP.137..267Y
>>>> http://www.innovative-dsp.com/products/ancapp.htm
>>>>> Reg
>>>>> Geoffrey Ramadan
>>>>> Kim Holburn wrote:
>>>>>> I have thought for a while that Libraries would be a great  
>>>>>> use. for RFID  A reader at the door would mean you would just  
>>>>>> have to walk out with the books and the library could  
>>>>>> automatically check them out to you!  Also staff could locate  
>>>>>> a miscatalogued book much more easily than now.
>>>>>> On the other hand, for privacy reasons maybe it wouldn't be  
>>>>>> such a good idea!!!  I clandestine reader at the door could  
>>>>>> tell someone what you were reading - but then a government  
>>>>>> organisation wanting that info could look up the database  
>>>>>> anyway and I seem to remember a bill that allows ASIO to hack  
>>>>>> into databases and read and change data legally.
>>>>>> On 2006 Oct 03, at 11:13 AM, Geoff Ramadan wrote:
>>>>>>> Roger
>>>>>>> Most RFID inquiries our industry get (including us) are crap.
>>>>>>> Most people have no real understanding of RFID and their  
>>>>>>> applications, and even less understanding of the limitations,  
>>>>>>> including Government Departments.
>>>>>>> We generally find that solutions to customer issues can be  
>>>>>>> found in other technology means, including barcoding or  
>>>>>>> process changes.
>>>>>>> I can quote you one example where a Government department  
>>>>>>> wanted to RFID tag documents, thinking that they could wave a  
>>>>>>> magic wand and locate them. What they really needed was a  
>>>>>>> process change, as their work practices were extremely sloppy  
>>>>>>> with no accountability.
>>>>>>> However, there is a growing interest and applications in "non- 
>>>>>>> human" asset management as indicated in the article.
>>>>>>> There is a strong trend towards active RFID tags for  
>>>>>>> "location based tracking" of assets. Hospitals and Mining  
>>>>>>> being an excellent example of this type of applications. The  
>>>>>>> assets are expensive (eg. Medical devices) which are very  
>>>>>>> mobile and need to be located efficiently, therefore gaining  
>>>>>>> better utilisation and lowering capital costs, while  
>>>>>>> improving services.
>>>>>>> In Government departments I suspect there is an interest in  
>>>>>>> asset tracking of notebooks.
>>>>>>> Regards
>>>>>>> Geoffrey Ramadan, B.E.(Elec)
>>>>>>> Chairman, Automatic Data Capture Australia (www.adca.com.au  
>>>>>>> <http://www.adca.com.au>)
>>>>>>> and
>>>>>>> Managing Director, Unique Micro Design (www.umd.com.au  
>>>>>>> <http://www.umd.com.au>)
>>>>>>> Roger Clarke wrote:
>>>>>>>> SMH/Age Next Section
>>>>>>>> 3 October 2006
>>>>>>>> Not so smart
>>>>>>>> Almost a third of Australian government agencies have set  
>>>>>>>> aside money for RFID-related projects, despite knowing  
>>>>>>>> little about the technology, a new survey has found.
>>>>>>>> RFID is the short-range wireless technology used in  
>>>>>>>> 'contactless' smartcards and e-passports.
>>>>>>>> Consultants Booz Allen Hamilton interviewed people in 28  
>>>>>>>> Canberra-based government departments.  Fewer than 10% had a  
>>>>>>>> good understanding of RFID standards, although money had  
>>>>>>>> been allocated for RFID projects.  Three-quarters of  
>>>>>>>> respondents plan to investigate or use RFID within the next  
>>>>>>>> three years.
>>>>>>>> [The local Booz site, which uses the suitably sceptical  
>>>>>>>> domain-name 'bah', doesn't seem to provide any information  
>>>>>>>> on the matter:
>>>>>>>> http://www.bah.com.au/Whats_New/press_releases.htm
>>>>>>>> [If anyone has any knowledge about what BAH thinks the 21  
>>>>>>>> departments think they plan on doing with RFID, a posting to  
>>>>>>>> the list, or an off-list note to me, would be appreciated.   
>>>>>>>> There are a few potential applications, e.g. in Defence  
>>>>>>>> Materiel;  but most agencies don't actually do the kinds of  
>>>>>>>> physical things any more that RFID is potentially useful for]
>>>>>>>> _______________________________________________________________ 
>>>>>>>> ___________ In addition, the part of the Oz IT Section that  
>>>>>>>> operates purely as a relay for Media Releases (IT Business)  
>>>>>>>> has a breathless piece on RFID today.
>>>>>>>> Fast track for radio tags
>>>>>>>> Ben Woodhead
>>>>>>>> Australian IT Section
>>>>>>>> OCTOBER 03, 2006
>>>>>>>> http://australianit.news.com.au/articles/0,7204,20500547% 
>>>>>>>> 5E15302%5E%5Enbv%5E,00.html AUSTRALIAN businesses are  
>>>>>>>> attaching radio frequency identification tags to sheep,  
>>>>>>>> trains, heavy mining equipment and nurses as they take  
>>>>>>>> advantage of the technology's ability to track assets and  
>>>>>>>> people.
>>>>>>>> ...
>>>>>>>> [The report is completely lacking in scepticism.  That the  
>>>>>>>> reporter is prepared to have his name on it is a testament  
>>>>>>>> to how little self-respect many journos have these days.   
>>>>>>>> Although I'd better allow for the possibility that  
>>>>>>>> 'Woodhead' is a pseudonym, intended to convey that the  
>>>>>>>> reporter thinks the same about this kind of rubbish as the  
>>>>>>>> rest of us do.
>>>>>>>> [Especially noticeable is the equivalent treatment of people  
>>>>>>>> and things.  There's no distinction at all drawn between  
>>>>>>>> tracking and controlling gamblers, nurses and prisoners and  
>>>>>>>> doing the same thing to sheep, cattle, and mining and  
>>>>>>>> hospital equipment]
>> --

Kim Holburn
IT Network & Security Consultant
Ph: +61 2 61258620 M: +61 417820641  F: +61 2 6230 6121
mailto:kim at holburn.net  aim://kimholburn
skype://kholburn - PGP Public Key on request
Cacert Root Cert: http://www.cacert.org/cacert.crt
Aust. Spam Act: To stop receiving mail from me: reply and let me know.
Use ISO 8601 dates [YYYY-MM-DD] http://www.saqqara.demon.co.uk/ 

Democracy imposed from without is the severest form of tyranny.
                           -- Lloyd Biggle, Jr. Analog, Apr 1961

More information about the Link mailing list