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Ask Slashdot: Best Books On the Life and Work of Nikola Tesla?

Ozoner Hype and Misdirection (140 comments)

Have lately been reading everything I can find on Tesla, hoping to find a rational scientific explanation of his "discoveries".
Unfortunately everything so far has been utter balderdash. Just an endless stream of hype.

I had hoped that "Man Out of Time would be better, but sadly it is not.
Cheney seems to be yet another author who has drunk the Tesla Cool Aid.

We hear repeatedly about "Powerful Vacuum Tubes" which turn out to be Geissler tubes,
and how Tesla would "let 100,000 volts harmlessly pass through his body" (no mention that it's high-impedance, and that nerves don't respond to H.F.)
And talk about his secret "High Power Oscillator", which was just a steam-driven linear generator.
Over and over we are told that "Scientists to this day don't know how this was done" when obviously most of it is third rate stage magic.

Hopefully one day a technically literate author will write a book which describes Telsa's work, but without all the hype and misdirection.

about 2 months ago
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Ask Slashdot: Best Books On the Life and Work of Nikola Tesla?

Ozoner Re:Not a narcisisst (140 comments)

Sorry, but NO.

Animals (and people) don't have complex impedances.

They are purely resistive (to all practical purposes)

about 2 months ago
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LTE Upgrade Will Let Phones Connect To Nearby Devices Without Towers

Ozoner Re:They've reinvented CB radio! (153 comments)

I forgot.

The question is: Will it work if you are out of range of the towers, or does it need the network to do the handshaking?

about 3 months ago
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LTE Upgrade Will Let Phones Connect To Nearby Devices Without Towers

Ozoner They've reinvented CB radio! (153 comments)

Once there was private peer-to-peer radio. It was called "Ham Radio". But the companies couldn't charge for it, so they made the radios always work through their base stations and called it "Cellular Radio". And of course they removed the peer-to-peer function.

But wait, now it's back! (in a way that can be monetised of course).

about 3 months ago
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Kano Ships 18,000 Learn-To-Code Computer Kits

Ozoner Re:Whoa, Deja Vu! (53 comments)

Likewise I started with a KIM-1 !

Also a SYM-1 and then a Rockwell AIM-65.
Then built my own version with a 6502 and a MM57109.

Then the Apple II came along...

about 3 months ago
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Scientists Twist Radio Beams To Send Data At 32 Gigabits Per Second

Ozoner Re:Polarization modulation. (122 comments)

Any kind of Multiplexing requires additional bandwidth.
TANSTAAFL.

If there's no change, there's no data encoded.

about 3 months ago
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Scientists Twist Radio Beams To Send Data At 32 Gigabits Per Second

Ozoner Polarization modulation. (122 comments)

It's still modulation, modulation creates sidebands, and sidebands require bandwidth.

Nothing has changed, the Shannon–Hartley theorem still rules.

about 3 months ago
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UK Ham Radio Reg Plans To Drop 15 min Callsign Interval and Allow Encryption

Ozoner Re:this leads me to a question. (104 comments)

It depends on the country, but in general it's OK to encrypt control codes, but not OK to encrypt data. Although shared keys probably fix the problem.

about 3 months ago
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UK Ham Radio Reg Plans To Drop 15 min Callsign Interval and Allow Encryption

Ozoner Re:Scrap all the rules (104 comments)

BTW, encryption is already permitted (in the ham bands) in many countries. The only catch is that the encryption must be via a publicly disclosed method.
There are many encrypted ham standards, PSK31 WSPR, WSJT, MAP65, Hellscriber, etc, etc.

The main reason (for public methods) is to prevent commercial organisations taking advantage of the generous Amateur Radio provisions.

about 3 months ago
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UK Ham Radio Reg Plans To Drop 15 min Callsign Interval and Allow Encryption

Ozoner Re:Scrap all the rules (104 comments)

You can now. Just stick to the allocated ISM bands (eg WiFi).

What you can't do now is build your own transmitter without a ham license. This obviously is to prevent interference to other services.

The philosophy is simple. License the Radio or License the Operator. The Amateur Operator has passed sufficient technical barrier to ensure that they won't do stupid things and cause interference.

There is one catch however. The Amateur License excluded commercial operations. To do that you need a commercial license.

The amateur license is primarily for self education.

about 3 months ago
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Restoring Salmon To Their Original Habitat -- With a Cannon

Ozoner So how does it actually work? (147 comments)

What a lousy article.

I've read that a vacuum sucks the fish into the tube, and then air pressure propels them along the tube, but how the hell is that achieved?

How do you get a vacuum at the start and then pressure all the way up?

about 4 months ago
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The Technologies Changing What It Means To Be a Programmer

Ozoner No Assembler? (294 comments)

I think it's the exactly opposite.
The modern programming environment is trying hard to lock the programmer into a box where he can't do much harm...

No one has more control over the computer than an Assembler language programmer.

And there's still lots of Assembly programming going on today.

about 4 months ago
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Mozilla Working On a New Website Comment System

Ozoner Side Wiki or something? (142 comments)

Likewise I have been trying to find or remember this tool.

I though it a very interesting idea. What happened to it?

about 6 months ago
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I Want a Kindle Killer

Ozoner I want a simpler KIndle (321 comments)

My problem with the Kindle Touch that changing pages frequently invokes some unwanted function. It is infuriating to change page and get the Change Font, or Annotate, or Save Clipping dialogs. I understand that some users like these functions. I don't, I hate them. I wish I could switch them off.

about 7 months ago
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Anonymous' Airchat Aim: Communication Without Need For Phone Or Internet

Ozoner It's just Ham software re-packaged (180 comments)

If you go to https://github.com/lulzlabs/Ai... you can access the original.

It seems they are using the Amateur Radio Fldigi software to support their Lulzpacket protocol.

All rather sad and overrated really.

 

about 8 months ago
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Anonymous' Airchat Aim: Communication Without Need For Phone Or Internet

Ozoner Re:And on many bands.. (180 comments)

I doubt that the FCC has been ignoring it, it is more likely that they have investigated and found that the fault is with the crappy domestic equipment.

I worked as a government Inspector for many years. I can tell you that the fault is almost never with the transmitter.

But once people decide that the problem is a "1000W CB booster", there is nothing you can do to convince them.

about 8 months ago
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Anonymous' Airchat Aim: Communication Without Need For Phone Or Internet

Ozoner Crappy Domestic Equipment (180 comments)

No matter how badly a Transmitter is tuned, it cannot be the cause of interference to land-lines and other non-radio equipment.

The cause can ONLY be crappy design of the domestic equipment.

about 8 months ago
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Anonymous' Airchat Aim: Communication Without Need For Phone Or Internet

Ozoner Crappy domestic equipment (180 comments)

From what you say, the fault is with the crappy domestic equipment. Most domestic electronics equipment in USA has very poor "Immunity" specifications. Any nearby RF will cause interference.

BTW, interference to non-radio equipment (eg a landline) can never be the fault of the transmitter.

And your claim that "boosting it's power" will "fuck up it's channel separation" shows that you haven't a clue.

about 8 months ago
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The Hackers Who Recovered NASA's Lost Lunar Photos

Ozoner Re:The Original Meaning of "Hacker" (89 comments)

> so the term was being extended to hardware hackers of various types,

In the 60's and 70's the term applied exclusively to hardware types.

about 8 months ago

Submissions

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NSA is watching Slashdot

Ozoner Ozoner writes  |  about 10 months ago

Ozoner (1406169) writes "We know that the NSA is recording everything which happens on Slashdot, so Is it no longer wise to moderate on Slashdot?

When you moderate on Slashdot are you giving the NSA a free insight into your private thoughts?"

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