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

 



Forgot your password?
typodupeerror
×

Comment Re:XB-70 (Score 2) 133

...In the mid 70's? someone defected in Japan with a Mig-25, almost crashing into a commercial jet at the Tokyo airport.

Viktor Belenko and it was Hakodate Airport in northern Japan. He overshot the runway, damaging the landng gear, but he was almost out of fuerl and couldn't go around (plus, he didn't want to get shot at).

Well of course the USAF pretty much went over it with a fine tooth comb before returning it. They found out the environmental system sucked,

The pressurized flight suit worked fine, I've never read that it didn't (athough the current F-35 program seems to be having problems). Possibly you are referring to the sophisticated environmental system for electronics that the Mig-25 did not have because its vacuum tube electronics did not need them? The vacuum tube radar was far more powerful than any on any U.S. aircraft, 600 KW continuous, with tremendous ECM burn-through power (the F-4 had a 30 kw radar).

the build quality suffered greatly

Probably you are referring to the fact that the Soviets did not use blind rivets everywhere, as in a US aircraft, but only where they were needed? Or the fact that titanium was only used where its high temperature properties were needed?

and the engines were prone to needing replacement after a few missions.

Not when flown according to guidelines (they did have a shorter life than U.S. engines though, true).

In other words, other than speed, it kind of sucked.

How about extremely high operating altitude, out of the range of most other combat aircraft?

It has a very creditable (though limited) combat record. But 75% of all Mig-25s were recon versions, and there their performance and record is outstanding, remaining in service in India until recently. It remains one of the most successful combat reconnaissance planes of all time.

Comment Re:Not the Big Bang (Score 5, Informative) 127

Cosmic inflation has always puzzled me - so the distance between particles of matter is slowly widening, without the particles themselves actually moving, why can't we observe this at the molecular level? Or do we? Even if its only a miniscule expansion at the smallest scales it must surely show some sign, and wouldn't it have some effect on say chemical interactions?

There are three different expansive phenomenon in modern cosmology - the initial inflation of the original symmetry breaking event, the subsequent vastly longer and slower expansion (measured by the Hubble Constant) that followed where the Universe coasted under influence of gravity alone, and then the recently discovered (and cosmically more recent) cosmic acceleration.that is now offsetting gravity.

The first event lasting a trillionth of a trillionth of a trillionth of a second did indeed push all the particles then existing apart very fast, while creating lots of new particles.

The second phase of coasting, and the modern phase when cosmic acceleration kicked in, is currently pushing things apart on a cosmic scale, but not gravitationally bound structures, much less the far more strongly bound electromagnetically bound ones (atoms and molecules, and molecular agglomerations) or nuclear force bound structures.

Eventually, under current models, cosmic acceleration will strengthen to the point where it will start ripping apart these galaxy clusters. then galaxies, then star systems, then stars and bulk matter, then molecules and atoms, then nuclei,and finally composite subatomic particles themselves.

Comment Re:Not the Big Bang (Score 5, Insightful) 127

There is tones of evidence against the Big Bang also.

It is one of MANY theories, they group it under the STANDARD THEORY, because that is politically they want to push as fact, when in fact, it is not fact, and they do not teach other theories that are equally as valid. THAT is the problem with academia.

The "tones" - frequencies and modulations in the cosmic medium - support the Big Bang model quite strongly.

The signal-to-noise ratio demonstrating the reality of the Big Bang in scientific data collected over decades is enormously higher than that of the posts appearing here today where numerous ACs spout contentless skepticism and derision, and to the extent they reference facts at all, they get them hilariously wrong.

Any AC who claims lots of evidence against a well-established scientific model, but it unable to cite a single scrap of same it simply polluting Slashdot and wasting everyone's time (including his/her own).

Comment Re:For fuck's sake, how does this get a 5, Insight (Score 1) 268

The coal plants can still be "plugged in" and operated during times of peak load (weekday summer afternoons and winter mornings); what they can't do is operate much the rest of the time.

The problem with this is that coal plants can't operate this way. A typical coal plant takes 4-8 hours to reach full power from a warm start and can take 24 hours to cold start. This is why we currently use them for baseload power and use other sources (mostly natural gas and hydro) for load following.

Stormv's argument was flawed, but it was unnecessary also. Coal has never been able to do load following, so other technologies were always required. Mothballed coal plants CAN be used as spare capacity when other generators are taken for maintenance or due to accident, with the same argument - they aren't operating all the time. This still reduces infrastructure, and thus overall, cost since otherwise spare (but unused) capacity must be built.

Comment Re:Nuclear power loses? (Score 1) 268

Where does this 'unsubsidized market' in PV and wind exist?

I mean, be real. Where??

If meant to be some sort of refutation, this is a non-sequitur. The unsubsized cost of renewables is easily calculated by simply removing the subsidy from the calculation, just as the cost for nuclear must be based on calculations of planned plant costs. When you do these calculations new nuclear is the most expensive form of energy due to its inherent high capital cost.

Comment Re:only winners are (Score 1) 268

Please provide concrete evidence, you know, actual facts with numbers, that are checkable (citations optional if Googling will bring them up) to support your arguments as others repeatedly requested instead of continually "arguing from your personal hatred of government" which, in your mind, excuses you from having to support your case.

Comment Re:only winners are (Score 1) 268

Remarks to which "khallow" was responding:

The program that the Solyndra loan was a part of was budgeted for a 10 or 11% loss rate and even with Solyndra it still had less than 5% losses..

The government has been running different programs like that for a long time (more than 50 years) to help encourage new technologies to get off the ground. They always write in a 10 or 15% loss rate into them and the programs seldom reach that rate

So the US has been using similar failed approaches for half a century? I'm supposed to be impressed by this why?

In fact the boost to the economy for the ones that do succeed probably far outweigh any losses in the programs.

What boost? Perhaps we could discuss some of these examples and see if they really live up to your claims.

The loss rate for venture capital is 33-50%. Typical loss rate for "safe" conventional commercial investment strategies are 15% for leveraged buy-outs, and 13% for growth equity. A 10-15% loss rate for government is similar, or better than, commercial investment strategies. The stated 10-11% target indicates a very conservative approach, and an actual 5% loss rate is exceptionally conservative.

But is, as it seems, your operating principle is "what ever the government does is bad (perhaps outright evil)" then none of this will matter to you.

Comment Re:old news from decades ago (Score 1) 199

TINSTAAFL? Mixing idioms much?

The famous phrase (quite deliberately using a non-mainstream dialect) is "there ain't no such thing as a free lunch": TANSTAAFL,

If you wish to recast it in a standard idiom (for reasons I cannot divine) then you should go with "there isn't any such thing as a free lucnh": TIASTAAFL. But this is pure pedantry.

Comment Re:Same shit as the Chinese Longsoon processor (Score 4, Insightful) 340

...

So if Russia really wanted their own chips, like their own design, their own production, and all that, and wanted said chips to be on the same level as modern chips from Intel, IBM, etc, well they'd have to spend a ton of money, and a good amount of time.

...

All is as you say. But your conditional statement reveals why your argument is irrelevant.

Why do the Russian chips need "to be on the same level as modern chips from Intel, IBM, etc,"? They aren't trying to compete against those companies. They aren't selling them on the open market. They are simply using them of desktop computers and servers in the government, by government purchasing decision.

Commercial processors reached the level that they can fulfill all the real functional needs of the vast majority of desktop applications years ago. A decade old chip running decade old office software can do everything nearly everyone working in an office needs to do as well as the latest and "greatest". Microsoft, Intel, and the PC makers now work in quasi-collusion to force "upgrades" on businesses that do not need them or want them to keep the revenue flowing, but with diminishing success at doing so. Witness the fact that 28% of PCs still run Windows XP despite facing the artificial pressure of support termination by Microsoft, and not being able to buy any XP computers for years.

The advantages of using the newest chips have little or nothing to do with supporting the core office functions for which they are purchased - it is to run "eye candy", power saving (not an issue Russia cares about), or applications that actually harm typical office productivity.

The issue is a bit more complicated for servers - but most server applications only require a tiny fraction of modern chip capabilities, which is why high degrees of virtualization are now common. The Russians will have to use more server chips, but each app will still run fine.

Comment Re:low carb and low PUFA vs high Omega-3? (Score 1) 166

A diet with all its components is very different than supplement pills.

...

Indeed so! In fact the lesson learned thus far from hundreds of epidemiological studies (with published papers in the tens of thousands) over the last 30 years or so is that no dietary supplement pill of any kind offers any benefit to the general population. Vitamin and mineral supplements provide benefit only when the taker is actually deficient in a nutrient being provided, and deficiency in any nutrient (but one*) is rare in wealthy nations.

*That one is vitamin D, the only nutrient for which you can make a case for taking a supplement.

Comment Re:Old news, circa 2011 (Score 2) 173

Another way to look at it: the $800 iPhone 5S 64GB contains $210 of parts and cost $8 to assemble, with giving an almost 300% mark-up. Laptop margins are usually 10% or less, Apple's laptop mark-ups are greater, around 30%. 300% is really remarkable.

Way more than 2,000,000 man-hours of highly paid engineers' design time (if you include time to design every single component, including bought-in CPU, graphics, etc- remember to descend recurssively into the design of every single bit of logic, power disttribution, analog bits). Of course most has been amortized over the past 50 years, Apple only pays for the top layer.

...

I guess we should count all of the hours spent in metallurgic and mechanical development since the dawn of the Industrial Revolution when considering the cost of car then?

Slashdot Top Deals

Saliva causes cancer, but only if swallowed in small amounts over a long period of time. -- George Carlin

Working...