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The One App You Need On Your Resume If You Want a Job At Google

ishmaelflood Re:Octave? (205 comments)

OcTave (as TFA's author would probably write it) is a sufficiently good clone of Matlab. I write many of my scripts ins Octave on a Mac at home, for use at work on PCs.

about a week ago
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Past Measurements May Have Missed Massive Ocean Warming

ishmaelflood 90% ? (423 comments)

So given that conventional atmosphere models have ignored this to date, if the oceans are storing 90% of the excess heat, why aren't the conventional models showing temperature rises 10 times as great as what is observed, say 5-10 deg C?

Either the summary or the article are slack in the extreme.

about three weeks ago
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Cause of Global Warming 'Hiatus' Found Deep In the Atlantic

ishmaelflood Fun Fact (465 comments)

If the Earth's atmosphere warmed by 1 degree C (approximately the size of the hockey stick) then that heat energy would warm the Earth's oceans by an unmeasurable 0.001 deg c. Yet the climate buffoons ignore the oceans in their models.

about 2 months ago
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White House Approves Sonic Cannons For Atlantic Energy Exploration

ishmaelflood Re:whales get the bends? (272 comments)

the air in your lungs is at the external pressure and so is the nitrogen in the joints etc, IF no additional high pressure nitrogen is injected into the system, the lungs and joints are in equilibrium no matter what the external pressure, they all compress together.

about 3 months ago
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White House Approves Sonic Cannons For Atlantic Energy Exploration

ishmaelflood Re:Not Even Funny (272 comments)

Interesting.

Subtract all fossil fuels from your current lifestyle. And all plastic, unless you are using casein(rendered cheese).

I think you'll find that your lifestyle will be about Cuban on the level of energy intensity. That is obviously feasible, but not without sacrifice. Unlike your idol Al Gore you won't be flying ANYWHERE ever again.

about 3 months ago
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White House Approves Sonic Cannons For Atlantic Energy Exploration

ishmaelflood whales get the bends? (272 comments)

Um, that's a bit of a puzzle, the whale breathes in air at atmospheric pressure, therefore to a first order approximation the air in its body can't be at much more than that after compression and then surfacing.

I'm not saying its impossible, but I can't see what pressure is driving the nitrogen deep into joints etc, it should all be in equilibrium.

the whole point with bends and SCUBA is that you are breathing high pressure air, and so high pressure nitrogen diffuses into the parts of the body with lower partial pressures of nitrogen, then when you surface the high pressure nitrogen wants to diffuse out again, but can't easily. If the whole lot starts in equilibrium then it all compresses together. This loosely is why duck diving into quite significant depths is safe without a decompression stage.

about 3 months ago
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White House Approves Sonic Cannons For Atlantic Energy Exploration

ishmaelflood Other loud noises (272 comments)

I wonder how loud they are compared with underwater explosions, volcanoes and seaquakes?

about 3 months ago
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Site of 1976 "Atomic Man" Accident To Be Cleaned

ishmaelflood the chemical reaction (299 comments)

" when a chemical reaction caused a glass glove box to explode"

any idea what that was?

My engineering brain struggles to find a heavy metal reaction that is unexpected. Oh, and enormous sympathy to HM, that's a horrible way to die.

about 4 months ago
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Researchers Claim Wind Turbine Energy Payback In Less Than a Year

ishmaelflood Re:Slashdot has drunk the KoolAid (441 comments)

Sorry, I misread the article, they are capping the growth in new WT installation for the next 6 years to about 80% of recent growth rates, and are building several new coal plants, whether that results in a net reduction in % windpower depends on economic growth achieved, ie crystal ball.

about 4 months ago
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Researchers Claim Wind Turbine Energy Payback In Less Than a Year

ishmaelflood Re: Slashdot has drunk the KoolAid (441 comments)

Which part of 'additional' didn't you understand?

about 4 months ago
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Researchers Claim Wind Turbine Energy Payback In Less Than a Year

ishmaelflood Slashdot has drunk the KoolAid (441 comments)

Oddly enough both of the calculations in the OP were correct, yes, the wind turbine generates energy equivalent to its energy of manufacture quite quickly, and yes it is still a bad idea to rely on wind energy for use in a national grid except for a tiny percentage, each MW of wind turbine relies on an additional MW of conventional generators if you want 24/7 availability, or I suppose you could try energy storage, which ought to be added to the turbine operating cost and energy payback.

Interesting to see such knee jerk support for an inappropriate technology. I wonder if the posters above have ever thought through why Germany is /reducing/ its reliance on wind turbines?

about 4 months ago
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UK Court Finds Company Liable For Software Defects

ishmaelflood Re:Yay! finally some accountability for all those (205 comments)

I think you've missed the point. Engineering software in general, including the stuff with a $4000 per seat per year maintenance contract, comes with a EULA that basically says the software provider is not liable for the results from that software.

Even if it is used in accordance with the help manual by trained users.

Even if the problem is directly caused by a fault in the software.

more than 4 years ago
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How To Behave At a Software Company?

ishmaelflood Don't need the dental hygiene advice (842 comments)

I read a few of the above. While the dental flossists seem to have taken over, here is my advice to a young real engineer-
-Yes, fair enough, wear clean clothes, shower, brush your teeth. You'd have to be VERY clever to make up for being stinky
-carry a notebook. When you ask a stupid question (probably all of them) note the answer down. That way you'll never ask the same person the same question twice.
-enthusiasm- we're fucking good at being cynical. Your attempt /will/ sound lame. Trust me, you need to be enthusiastic before you'll get accepted.
-sense of humour- you will need one
- stupid hours- I regard people who work long hours as people who can't organise themselves, or production-workers. Others may differ.

BTW, computer engineers aren't real engineers. There may be different rules for them.

more than 4 years ago
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Do Gamers Want Simpler Games?

ishmaelflood Vaguely relevant comment (462 comments)

Sorry, I haven't read any of the above inspiteful commentary.

here's my take.

Most good games are too long.

80 bucks Australian for a game, I'd really like to know I've done it at 40 hours or less.

Here's the big name games I've played through, and thought the length was about right

DOOM
Terra nova (several times - actually this is due to be played again)
System Shock (the original-I'd play this again if Barry gives me the CD back)
Warcraft 2 (bit dull now)
C&C
Mechwarriors- 2 and 4 (was there a 3?)

HalfLife was brilliant except the last mission was stupidly hard and I gave up and I won't play it again
Syndicate was brilliant, the last mission was stupidly hard but I did it once, and I'll play it again but ignore the last msiiosn

UFO - I've played a couple of times quite a long way through, without really getting to the end. Quite happy to do it again from scratch, the early msiisons are much more fun.

Biggest playability award goes to Gunship 2000 - in squad mode, or railroad tycoon.

more than 4 years ago
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Berkeley Engineers Have Some Bad News About Air Cars

ishmaelflood Re:At least they don't pollute the city directly (278 comments)

I think you are referring to MDI? They haven't manufactured a single production vehicle, despite 10 years of press releases. They have got rather a lot of ignorant investor's money.

Why would the oil companies give a monkey's about air cars? The thermodynamics proving that they are hopelessly inefficient is covered in the first year of an engineering degree, at least in the UK.

The early stories were reprints by mouth breathers, of the press releases issued by a company desperate for investor's funds.

Yes, if you compress air carefully and keep it at the temperature to which it rises (very hot indeed), and then decompress it carefully, you can make it quite efficient. BUT your range will suffer a lot, as the mass of air that can be stored is then much smaller.

more than 4 years ago
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What To Cover In a Short "DIY Tech" Course?

ishmaelflood english teachers doing tech (256 comments)

Hey here's a goddamn excellent idea, while we're at it why not get techies to teach English?

about 5 years ago
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The Right Amount of "Challenge" In IT & Gaming

ishmaelflood self congratulation is rarely attractive (103 comments)

Man, I wonder if the little dude sprained his elbow while he patted himself on the back.

Some days I play Solitaire, other days I play Risk. Neither defines /me/. At work I solve Hamiltonians, and struggle to add budgets up. Neither defines me.

more than 5 years ago
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NASA Offers $1.5 Million For 200MPG Aircraft

ishmaelflood Re:Do the math (146 comments)

I forgot to add that the rules are almost certainly fudged to encourage alternative technologies.

The wingspan limit makes achieving a 50:1 L/D very difficult - I'm not an aerodynamicist. However once the L/D drops to 30:1 then its game over man.

more than 5 years ago
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NASA Offers $1.5 Million For 200MPG Aircraft

ishmaelflood Do the math (146 comments)

L/D for a really good plane 50:1

plane weighs roughly 4 times as much as the passengers (proabbly lowball)

passenger weighs 80 kg

speed=100 miph=160 kph=50 m/s

so constant power required=1/50*(4*80)*10*50=3200W

Best engine efficiency ~40%, best prop ~80%, calorific content of fuel is 38 MJ/kg= .8*4*38 MJ/gallon, so fuel consumption is 3200/(.32*3.2*38*10^6) gallons per second. So in 2 hours there are 7200 seconds, so ttoal fuel used is 3200/(.32*3.2*38*10^6)*7200

So, that is 0.6 gallons for 200 miles for one passenger

Conclusion, probably do-able, it'll cost way more than 1.5 million

more than 5 years ago

Submissions

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ishmaelflood ishmaelflood writes  |  more than 8 years ago

ishmaelflood (643277) writes "Here's a couple of ideas for single purpose Live CD distros, I've checked so far as I can and no-one has quite done them before.

1 The home backup monster

This would comprise two CDs, and maybe a network cable. Chuck the CDs into two boxes, plug them together. They would then find each other, and display all hard drives on each computer, and then give the option of backing up selectable drives/partitions/folders from one computer to the other.

The reason this would be handy is that if you are running various flavours of Windows the networking is frankly Byzantine. I have a 120 Gb hard drive running under NT4 WS which works perfectly. Yet as seen by my XP Home box it is only 2 GB big, and has no free space. I've seen similar problems with W98.

2 The OpenFOAM Live CD

Many engineers would like to use OpenFOAM and other open source programs, but don't want to install Linux on their company machine. So, create a distro which sets up storage space on the Windows disk, and runs OpenFOAM for you straight from the CD. FWIW OpenFOAM runs just fine under Ubuntu. Obviously a useful selection of other software could be included, I'd suggest Gnumeric and Scilab at the very least.

3 ...Profit

I don't know if you could make money from either of those ideas, the first one is probably too obvious, the second has a small audience."

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