Sounds to me like someone has too much time on their hands. On the face of
it, it is amusing, but it is this kind perceived hazard that safety
agencies and lawyers love, with the result that ridiculous requirements
like this start appearing in safety standards. Maybe we should just ban all
I have design speed and phase controllers for small systems running at 64
krpm (IR scanner) that used low pressure Helium to reduce drag and to
operate 'air' bearings.
Some of the big problems in cars are going up-hill and running into ditches
(gyroscopic effects) and what happen to that energy
RE: Virus Alert 5/10/02
I have seen this hoax before do not delete this file or windows will not run.
Steve Grobe wrote:
This could very well be a hoax.
http://www.sophos.com/virusinfo/hoaxes/sulfnbk.html
-Original Message-
This hoax was passed around my area 6 months ago. The virus is a
self-inflicted virus, i.e., doing what the email suggests damages a
necessary part of your file manager program. See the link below for full
details.
--
From: Steve Grobe[SMTP:ste...@transition.com]
Reply To:
What are the units? 234.5 ...what?? Looking at what the units are, will
basically tell you exactly what the property is related to.
Nonetheless, you cannot possibly directly determine what the temperature
change of something as physically and geometrically complex as a
connector, merely by
Ned,
Not familiar with this K term. For straight resitance changes in
transformers, we always used 0.0039 per C. Does K somehow include contact
resistance, not just bulk resistance?
This is definitely the time to measure it.
Environmental chamber at -50, 0, 50, 100, and 150. Make your own
Going around corners presents another interesting problem, depending on
the orientation of its axis. The vacuum chamber that such a flywheel
must operate in (to make it practical) presents another interesting
challenge.
Bob Wilson
TIR Systems Ltd.
Vancouver.
-Original Message-
From:
This could very well be a hoax.
http://www.sophos.com/virusinfo/hoaxes/sulfnbk.html
-Original Message-
From: Dan Teninty - DTEC Associates
[mailto:dteni...@dtec-associates.com]
Sent: Friday, May 10, 2002 9:52 AM
To: dteni...@dtec-associates.com
Subject: FW: Virus Alert
Hi,
Does any one know how the constant for CoR formula was determined? I know
the K is 234.5 for copper and 226 for aluminum, but what property is this
related to?
I am trying to determine the change in temperature of a connector, based on
the change of resistance. The connector contacts
Attached is a link to MSNBC's news site. There is an article about a new site
launched by the FCC and FDA which addresses safety and EMI concerns for cell
phones. Thought you might be interested.
http://news.com.com/2100-1033-908671.html?legacy=cnettag=pt.msnbc.feed..ne_9874454
I hope that I don't lead the thread off on a tangent...but a similar problem is
being encountered by those who envision magnetically levitated flywheel powered
electric cars. (By the way, the flywheel is levitated, not the car)
A well designed flywheel system can store electricity with a
Hi all
I have problems concerning clearance and creepage values in EN61010-1.
I have a product with a 24 ac and a 230 relay. The 24ac can be used for
sensors and are regarded as double insulated in the 230 Vac transformer
for safe operation. But what are the clearance and creepage to the 230
No need to worry. First, a CD can be spun at many tens of thousands of
RPM without destruction. But more importantly, the spin ratios are not
straight multiples of the basic disk RPM. After all, if this were true,
the 300 to 400 RPM maximum speed of a 1X CD player, would be 19,000 to
25,600 RPM,
Reminds me of an article I read some years ago, where an engineer was
reminiscing about the early days of hard disk drive development. IBM was
the company, I think. Anyway, when the absolutely beautiful and
impressive testbed was fired up and began to run, the nearly room-sized
piece of
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