[TowerTalk] NEC4 server

[jimlux]

On 11/9/19 10:50 PM, K9MA wrote:
> Gee, I remember the days when you had to take a stack of cards to the 
> computing center, and come back the next day to find out you made a typo 
> in card 134.
> 
> Joking aside, I think it would be great if one could have access to NEC4 
> that way. I understand it can actually model buried radials, and may 
> cope better with closely spaced wires.

It does model buried wires, and wires that cross the boundary between 
above and below ground.

And it does much better with closely spaced wires, wires at angles, and 
wires with very short segments (relative to wavelength)

Basically, all the complaints about what NEC2 (which is vintage 1980) 
doesn't do well were fixed in NEC3 and NEC4.1 (which is vintage 1992) 
and NEC4.2, which is vintage 2011 (the better ground model GN3 is from 2011)



Ground Model info here:
LLNL-TR-490316
https://digital.library.unt.edu/ark:/67531/metadc868579/


> 
> 73,
> Scott K9MA
> 
> On 11/9/2019 19:52, jimlux wrote:
>> On 11/9/19 4:57 PM, James Ying wrote:
>>> It’s a great idea for folks like me who don’t have a NEC4 license! 
>>> It’s not very hard to implement, just use a queue (such as RabbitMQ, 
>>> Active MQ or AWS SQS) to accept and distribute jobs, and use a web 
>>> page to upload files and send jobs to the queue, the server listens 
>>> on the queue, and do the computation, send an email to the user or 
>>> let the user fetch the results with an ID obtained when submitting 
>>> the file. At work, I have wrote a few these applications for cancer 
>>> researchers. The only issue is the NEC4 license, does it allow these 
>>> kind of “sharing”?
>>>
>> That is, in fact, the important question - I'll have to seek some 
>> legal assistance.
>>
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>