Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment Re:What difference now does it make? :) Sunk costs (Score 1) 364

If you start again, which is an option, you don't always develop existing platforms, you develop new.
Or we would not have the highly regarded aircraft we have.
Especially in stealth, where the airplane shape is so important.

F-22, air superiority is it's main task. It is not a swiss army knife.
The F-14 and F-15 were not tasked with other roles until later in their evolution.

Stealth is never handled by having other aircraft along. You move from visible to even more visible.
Wild weasel aircraft will accompany some strike packages to confuse/jam enemy radar, but that is not absolutely not stealth.
If the F-35 is that bad that it will require that kind of support, then the whole point as been missed.
And probably, it is the frontal hemisphere that they care about. It is an attack aircraft, and will be headed towards the enemy ( until they have accomplished ( hopefully ) their mission and are egressing ( but at that point, the enemy knows they are there... ) )

No aircraft came off the designer's in great shape. Not in any era.
WWII aircraft manufacturer came up with a block system within models to track all the changes they were making.

Comment Re:What difference now does it make? :) Sunk costs (Score 1) 364

No one is standing still though.
They will not be survivable forever, and you cant ( as we are seeing ) just wait and see.

And I would be stunned and amazed if the USAF were to seriously consider buying aircraft from the same basic generation as the aircraft already in inventory. If they wanted that, they could continue building what they have ( with potential updates, of course ).

The issues are the stealth features, which are hard to backfit on existing aircraft and the electronics/radar, which you might be able to, but you would have a major refit to accomplish ( assuming there is room/power/etc ) in the aircraft.

Comment Re:What difference now does it make? :) Sunk costs (Score 1) 364

Of course ( as already noted ) is a compromise.
And it really isnt supposed to be dogfighting, I expect, but rather ( in an ungentlemanly fashion ) standing off and killing the enemy before they get close.

And yes, they are R&D problems. Any advanced aircraft will be having those.

Note, I am not saying that the F-35 is a perfect plane and is a model for procurement or production.
All I have read leads me to think that there is plenty of learning in how to do it better next time.
But I think it is still possible to have a great aircraft ( albeit an expensive one ) to result from this.

Comment Re:What difference now does it make? :) Sunk costs (Score 4, Insightful) 364

You cannot continue to go out and fight with older weapons though.
Nominally, the F-15/F-16/F-18 are not as survivable in a modern air war.
A proven fighter is one that has been through the teething problems that the F-35 is going through now.
It may well be that it would be better to start over, but we would then have to start another project, because the above mentioned fighters are getting long in the tooth.

Medicine

Another Dementia Test Oversold 24

An anonymous reader writes: Many prominent news organizations, including the BBC, are reporting on a study (PDF) that claims a new blood test is 87% accurate in predicting which patients will develop cognitive impairment. It's hailed as a major step forward in efforts to fight dementia and Alzheimer's disease. Unfortunately, reality isn't quite so impressive. An article at MedPage Today explains all of the statistical facts that the mainstream press glosses over: "Only about 10% of patients of patients with MCI convert to clinical dementia per year. With nearly 30% of positive results false (remember, the specificity was 71%) as well as 15% of negative results false, most of the positive results in such a group will be false. Yes, it's time once again for a tutorial in positive predictive values. If we have 100 MCI patients and a 10% conversion rate, then 10 of them will develop dementia. These are the true positives. There will be 90 true negatives — the ones who don't convert. But with a specificity of 71%, the test will falsely identify 29% of the 90 true negatives, or 26, as positive. Meanwhile, with a false negative rate of 15%, only nine (rounding up from 8.5) of the 10 true positives will be correctly identified. ... It's easy to get a high negative predictive value when the annual event rate is 10%. If I simply predict that no one will convert, I'll be right 90% of the time."

Comment Longest uptime (Score 1) 285

"The world record for continuous application availability may be held by the Irish National Railway, which is said to have logged an unbroken 17 years running on OpenVMS version 3.2." I'd say the guys that wrote such a stable system must be pretty good programmers.

Comment Re:It's working so well in Venezuela (Score 1) 530

I think most people would choose something more fulfilling than pictures of cats.

I know I would. I have one recent software idea that I don't have time to work on.
My wife recently did a project collecting books from authors to donate to kids in the Philippines as part of a thing my Church did.
My kids and I volunteer at food bank activities often.

The things I could do if I didn't *have* to work.
And note, I would still work. I love my job, most of the time.

Comment Re:19,000 (Score 2) 401

Yeah, sure.
But why can they sell for that price? Because enough people had it to spend and wanted it.
Why did they have it to spend? Because they *made* enough money. Wages. Higher wages.
Since these companies send the work overseas, fewer people here have that much money.

The owners of America are basically encouraging wage arbitrage because they can pick up a good number more dollars doing it.

But don't forget, markets work. As we ship more of the jobs overseas, the average wage here will fall. ( is this not what we are seeing? )
( we will ignore the pain of those who are losing their jobs, unimportant )
The ability to spend will fall.
Demand will fall. People will lose jobs due to layoffs, average wages fall some more,
Places that used to do things here will ( to the extent possible ) decline in doing so.
Wages will, in the longer term, adjust out to some kind of average.
Prices here will have to fall in line with the wages. Again, in the longer term.
Greed will cause the prices to be sticky for some period of time.
And lower cost places will be chased when/if the wages in a particular place overseas begin to climb.
Yes, factory build costs will make that sticky, but in the longer term, it will happen. ( and are we not seeing it? )
Think we will be allowed to sell stuff ( free market, man ) in those overseas places when wages have averaged out? ( arent there already restrictions? )
I don't think so. If you do, I'd like to know why you think that.

So, yeah, it is "working" for them, by giving the shaft to the customers they sell to.
Strikes me as stupid.

Slashdot Top Deals

Today is a good day for information-gathering. Read someone else's mail file.

Working...