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Search: Posts Made By: arcniz
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1st Aug 2014, 17:33
Replies: 6
Views: 2,290
Posted By arcniz

If Mr. Greenberg's assertions are correct, NONE...

If Mr. Greenberg's assertions are correct, NONE of this is obvious. I cannot verify the whole chain in detail without considerable effort, but his case, as presented, makes sense. If it were easy to...
1st Aug 2014, 03:03
Replies: 6
Views: 2,290
Posted By arcniz

USB interface microcode may be inherently vulnerable

If Andy Greenberg and others are right, a large portion of existing USB devices - from keyboards to peripheral controllers and data-keys - may be vulnerable to reprogramming at the microcode level of...
9th Mar 2014, 13:46
Replies: 11,823
Views: 22,377,581
Posted By arcniz

A totally speculative but possibly plausible...

A totally speculative but possibly plausible scenario one can see, based on facts and comment cited in world press and here (from reading every current pprune thread item to this point), is that some...
26th Jun 2012, 00:28
Replies: 5
Views: 1,357
Posted By arcniz

Interesting visualization! Thank you for the...

Interesting visualization! Thank you for the sharing, Milo.

Back in the dark-ages, 1990 maybe, I wrote (for a lark) a bit of software to both test the brave-new world of high-res (640x480) color...
25th Jun 2012, 23:59
Replies: 9
Views: 1,727
Posted By arcniz

Having been one of those consulting developers...

Having been one of those consulting developers occasionally while in school, and having hired quite a few such afterward for projects small and large, one would advise that this may not be the right...
25th Jun 2012, 23:24
Replies: 14
Views: 1,153
Posted By arcniz

Curiously enough, that is exactly the principal...

Curiously enough, that is exactly the principal problem one has noted in the current generation of SATA connectors -- exposure to moisture with some modest amount of corrosive chemical (salt...
Forum: Tech Log
27th May 2011, 08:24
Replies: 3,435
Views: 1,567,735
Posted By arcniz

"Better automation" is more to the point. ...

"Better automation" is more to the point. Relative to the sophistication of airframes, turbines, and other aircraft electromechanical and aerodynamic systems, the Automation is roughly in the era of...
9th Sep 2010, 08:59
Replies: 731
Views: 531,983
Posted By arcniz

Bean-Counting solution for solving problem of forward viz in fire situation

Here's a napkin analysis for actually addressing this problem :
the numbers are approximate, but maybe not unreasonable vs actual:

(assumes various commercial products now available, including...
12th Sep 2009, 03:46
Replies: 9
Views: 1,028
Posted By arcniz

Funny that, how something with a few billion...

Funny that, how something with a few billion working parts may seem complicated... at times.
11th Sep 2009, 08:08
Replies: 17
Views: 1,811
Posted By arcniz

Tip: Do not P.O. a professional Spammer

Quite a while back in the history of SPAM, maybe 1994 or 1995, I discovered the truth of the above tip.

One day I noticed my business email address was being mis-used in a commercial promotion...
11th Sep 2009, 07:22
Replies: 35
Views: 2,952
Posted By arcniz

Microsoft's entire business franchise seems to...

Microsoft's entire business franchise seems to rely on never getting it all right all at once. Keeps folks coming back for more.
11th Sep 2009, 07:13
Replies: 41
Views: 3,206
Posted By arcniz

Power ?

Power-supply is nominally the simplest part of the CPU environment, but also the one that can mess up nearly everything (or anything) when it is having a mood.

Power is suspect for faults at...
Forum: Tech Log
20th Jun 2009, 06:24
Replies: 4,591
Views: 3,128,737
Posted By arcniz

Why not measuring the outside ambient air? The...

Why not measuring the outside ambient air? The surrounding air is the most important game of all to measure -- ambient air ultimately is controlling everything else in the flight envelope.

Physics...
17th May 2009, 17:16
Replies: 28
Views: 3,400
Posted By arcniz

Hey Rivets -- have you tried swapping mike...

Hey Rivets -- have you tried swapping mike sources at her end of the line. No amount of signal processing will help you if the source is doing the distorting.

Remember the good `ol days of carbon...
14th Nov 2008, 05:34
Replies: 402
Views: 136,824
Posted By arcniz

Although physics still works about the same as in...

Although physics still works about the same as in the past, the character of possible radio waves and transmission schemes, at nearly all wavelengths and energies, has become much more complex over...
3rd Oct 2008, 03:42
Replies: 55
Views: 13,521
Posted By arcniz

Lost in the wind

Steve Fossett was an enterprising adventurer who had given fate many even-odds chances to take him earlier than this. He opened frontiers and tested boundaries and set records that required a special...
25th Sep 2008, 04:59
Replies: 14
Views: 1,287
Posted By arcniz

Said to be often much easier to obtain...

Said to be often much easier to obtain forgiveness than permission.
30th Aug 2008, 04:35
Replies: 1,109
Views: 359,757
Posted By arcniz

As written: Spotted reptile's contentious...

As written:


Spotted reptile's contentious demand as a "reply"


SR - you seem presumptuously argumentative - a bit inappropriate for someone with only 3 posts on the counter... even for an...
29th Aug 2008, 15:27
Replies: 1,109
Views: 359,757
Posted By arcniz

Similar circumstances (CVR stays on until...

Similar circumstances (CVR stays on until overwritten) seem to often occur quite often when "incidents" do not progress to "accidents". One may draw one's own conclusions...
19th Aug 2008, 18:38
Replies: 1,109
Views: 359,757
Posted By arcniz

Along the same lines: A possibly more likely...

Along the same lines: A possibly more likely mechanism if one considers the scenario of hull-failure preceding O2 bottle failure, is that some object or objects in the cargo hold were caught up in...
12th Aug 2008, 03:32
Replies: 24
Views: 9,561
Posted By arcniz

Will be interesting to see how the A320 and...

Will be interesting to see how the A320 and others in the family mature. Passing time complicates logistics for inserting design changes and maintaining the overall functionality of systems as the...
12th Aug 2008, 02:00
Replies: 51
Views: 10,537
Posted By arcniz

Measurement appropriate?

Given the constant risk of cabin air contamination events, the potential hazards bad air presents to safety of the persons on board and the aircraft, and the operational costs associated with...
31st Jul 2008, 21:03
Replies: 1,109
Views: 359,757
Posted By arcniz

Interesting to note in CPTN's post #823 upper...

Interesting to note in CPTN's post #823 upper photo that the two adjacent O2 cylinders are significantly different in appearance and somewhat different in fixturing:

Even with allowance for...
30th Jul 2008, 23:19
Replies: 1,109
Views: 359,757
Posted By arcniz

Looking for a failure mechanism... pure...

Looking for a failure mechanism... pure conjecture, only.

From the pix at #703 (and before), it would appear that a looseness or failure of the single restraining strap on the bottle, so it is ...
26th Jul 2008, 23:08
Replies: 1,109
Views: 359,757
Posted By arcniz

Idle speculation: Litebulbs comment about...

Idle speculation:

Litebulbs comment about the O2 cylinder visible in post 358 pix #2 looks right to the eyeball. From the same pix, the white harness dimly seen just forward of the green object...
15th Jul 2008, 00:58
Replies: 3
Views: 3,280
Posted By arcniz

Thanks for sharing the IATA fuel economics...

Thanks for sharing the IATA fuel economics forecast, relax. An old chum who is now responsible for public policy planning for aviation infrastructure has been bugging me for industry data. Plenty of...
14th Jul 2008, 02:01
Replies: 3,239
Views: 1,076,292
Posted By arcniz

Fundamental changes of method also go through a...

Fundamental changes of method also go through a cost-benefit filter and a "testability" filter.

Given at least a few incidents of unpowered flight, approaches, and landing sequences in heavy...
9th Jul 2008, 17:56
Replies: 205
Views: 57,543
Posted By arcniz

Of course it IS self-serving PR for BA, but why...

Of course it IS self-serving PR for BA, but why not? Might as well go for some closure in the minds of the flying public while the memory is still slightly fresh.

The flight deck fellows are in a...
9th Jul 2008, 02:32
Replies: 205
Views: 57,543
Posted By arcniz

Surprised to see merit rewarded in a...

Surprised to see merit rewarded in a straightforward way. Well deserved!

What really stands out is that the flight crew were able to focus and to stay out of each other's way and to act...
5th Jul 2008, 23:57
Replies: 3,239
Views: 1,076,292
Posted By arcniz

While I am not the world's greatest typist, the...

While I am not the world's greatest typist, the time it has taken to type THIS sentence is approximately the time available for the entire process on BA038, from recognition of problem to arrival.
...
3rd Jul 2008, 18:49
Replies: 3,239
Views: 1,076,292
Posted By arcniz

The poster's highly emotional comment, and the...

The poster's highly emotional comment, and the underlying concept, are misplaced here.

A number of reasonable persons consider fuel a likely or at least possible cause for the power failure...
23rd Jun 2008, 06:24
Replies: 37
Views: 8,476
Posted By arcniz

Heating may well add some flexibility to the...

Heating may well add some flexibility to the high-surface area interfaces at the boundaries from glass to plexi and back. Most of the change of behavior would be in the plastic layers and the bonding...
19th Jun 2008, 07:27
Replies: 3,239
Views: 1,076,292
Posted By arcniz

I find it very gratifying to see so many informed...

I find it very gratifying to see so many informed and thoughtful people putting their heads together on the "outside the box" analysis underway. In the worst case, this discourse burns some time but...
15th Jun 2008, 18:35
Replies: 3,239
Views: 1,076,292
Posted By arcniz

That may be hard to come by. Problem is that...

That may be hard to come by. Problem is that typical fuels are not an "it", but a complex and widely varying collection of complex components blended to meet a set of specs. A batch could consist...
10th Jun 2008, 07:57
Replies: 3,239
Views: 1,076,292
Posted By arcniz

The 7500 hours from publication allowance in the...

The 7500 hours from publication allowance in the testing requirement suggests a complete lack of any sense of urgency in this inquiry. Cold prospect as far as they're concerned.
Showing results 1 to 35 of 337
 


 
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