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Comments

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Solar Plant Sets Birds On Fire As They Fly Overhead

AnotherBlackHat Re:Drop solar heat for direct conversion (521 comments)

Except you can not exceed the solar power that hits the surface of the planet from the sun.

There are actual, serious, plans to put solar in orbit. Solar isn't limited to the surface of the planet.

But let's ignore that power-in-sky thinking for a moment.
The amount of sunlight that hits the Earth is an astronomical 150,000,000,000,000,000 Watts.
That's around 1000 times man's total energy usage.

To put it in per capita terms;
At noon, 1 square meter on the surface receives about 1 kilowatt of energy.
The average over a day is 4 kilowatt hours per square meter.
A typical home is 100 square meters, and uses 24 kilowatt hours a day.
At 12% efficiency, you only need to cover half the roof with photovoltaics to supply 100% of that homes electric needs.

about a month ago
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Companies That Don't Understand Engineers Don't Respect Engineers

AnotherBlackHat Re:us other engineers matter, too (371 comments)

Valuing people by their number of direct or indirect reports makes a lot of sense. If I am one of a group of ten people and I'm 20% more productive than the others, my extra contribution only adds about 2% to the total. If I am a good manager my staff might be 5% more productive than an average manager's.

If you're good you should be in charge of more people, but being in charge of more people doesn't make you good.
Or to put it another way, just because a position is important doesn't mean the person in the position is.

about a month ago
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Mass. Supreme Court Says Defendant Can Be Compelled To Decrypt Data

AnotherBlackHat Damned if you do. (560 comments)

"We know you did it, so until you confess, we're going to hold you in contempt of court."

The court is claiming that they really, truly, pinky swear know he did it, because they heard him say so, so that whole "can't force you to testify against yourself" thing doesn't apply.

I don't believe the spirit of the 5th is that it doesn't apply when we know you're guilty.

about 3 months ago
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Cable Boxes Are the 2nd Biggest Energy Users In Many Homes

AnotherBlackHat Math is hard. (394 comments)

A typical set-top cable box with a digital recorder can consume as much as 35 watts of power, costing about $8 a month for a typical Southern California consumer.

A "typical Southern California consumer" pays less than 20 cents per kWh.

35 Watts * 24 hours/day * 30 days/month = 25,200 Watt hours or 25 Kilowatt hours.
25 Kilowatts * $0.20/Kilowatt hour = $5.00

about 3 months ago
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EU's Top Court May Define Obesity As a Disability

AnotherBlackHat Pro thin (625 comments)

If being fat is a choice, why are more people choosing it now than in the past?

about 3 months ago
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Imparting Malware Resistance With a Randomizing Compiler

AnotherBlackHat It won't help (enough) (125 comments)

Viruses in nature mutate randomly. Computer viruses don't.
Computer virus designers are intelligent, hostile, and evil in intent.
If there's a way around it, they'll find it and it's game over.

Besides, many if not most attack vectors wouldn't care a whit - tricking a user into executing code would still work, SQL injection, cross site scripting...

about 4 months ago
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Mental Illness Reduces Lifespan As Much as Smoking

AnotherBlackHat Those whom the gods would destroy... (192 comments)

Syphilis drives you crazy, and then kills you. It doesn't kill you and then drive you crazy.
Any disease or genetic condition which slowly kills you is likely to make you depressed first.

about 4 months ago
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Is LG's New Ultra Widescreen Display Better Than "Normal" 4K?

AnotherBlackHat Betteridge said it best: No. (304 comments)

First of all, 3440x1440 isn't better than 3840x2160.
If you really truly believe that a 21.5 aspect ratio is better than a 16:9, you could put a piece of tape over the bottom 500 lines of a "standard" 4k display and still end up with a higher res.

How about building a display panel that doesn't have edges?
Give me a dozen megapixel panels and a let me arrange them however I like.
Make them modular, interchangeable, cheap, and the whole display becomes expandable.
Or improve the power efficiency, or the cabling, or the weight, or the color depth, or... any of a dozen other things I care about more than the aspect ratio of a single panel.

If you absolutely must claim that one aspect ratio is superior to another, then why not go with the golden ratio?
At least that way you can put two together and still have the same ratio.

about 4 months ago
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Teachers Union: Computers Can Negatively Impact Children's Ability To Learn

AnotherBlackHat Unless it doesn't. (310 comments)

Maybe the reason those kids aren't paying attention is because they are learning stuff elsewhere and feel you're just wasting their time.
Or maybe it is, as the union suggests, because they realize how lame school is by comparison.

Or maybe kids are paying better attention now then they have in the past, and the union is falling for the golden age fallacy.

From http://www.princeton.edu/futureofchildren/publications/docs/10_02_05.pdf
The limited evidence available also indicates that home computer use is linked to slightly better academic performance.

I'll take that limited evidence over the "no evidence" supplied by the teachers union.

about 4 months ago
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OpenBSD Team Cleaning Up OpenSSL

AnotherBlackHat Re:What about a re-implementation... (304 comments)

While it might be nice to use a safe(r) language, can't we at least have a compile option in C that adds bounds checking?

And while you're at it, how about making it impossible to execute code that isn't in the code segment and write protecting the code segment.

about 5 months ago
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The 3D Economy — What Happens When Everyone Prints Their Own Shoes?

AnotherBlackHat Food printers (400 comments)

There's an amazing technology called "seeds".
These "seeds" grow into actual, eatable food.
Even better, they're solar powered and the feedstock is water.
And to top it off, one of the things these "seed" machines can manufacture is more seeds!

Thanks to this technology, the future will be filled with people who grow their own food, and things like supermarkets will become a relic of the past.

about 6 months ago
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NSA and GHCQ Employing Shills To Poison Web Forum Discourse

AnotherBlackHat Re:The slides... (347 comments)

A slashdot sock puppet could follow the classic ideas in "The Gentleperson's Guide To Forum Spies (spooks, feds, etc.)"

Slashdot moderation makes it a lot harder. For example, off topic rants are down modded to oblivion, and the structure of the reply tree make forum sliding much more difficult.
It would be far easier for the NSA to destroy Slashdot by buying it, then changing the way the forum works.

about 7 months ago
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LA Times: Snowden Had 3 Helpers Inside NSA

AnotherBlackHat Scapegoats must be found! (148 comments)

Unable to put Snowden on trial, the NSA has decided to sacrifice three other employees.

I look forward to the circus of their trial, I hear they'll be serving bread.

about 7 months ago
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Will Electric Cars and Solar Power Make Gasoline and Utilities Obsolete?

AnotherBlackHat Re:Fine. Let's have "Oranges vs. Orange equivalent (734 comments)

>Okay, compare a contemporary battery...

No, that's precisely my point - don't compare a tiny subsystem of the car and pretend that's the whole problem.

It's not just the fuel, or the fuel plus the fuel tank.
It's the fuel, the tank, the engine, the wheels, the cooling system, the exhaust system - basically everything.

about 8 months ago
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Will Electric Cars and Solar Power Make Gasoline and Utilities Obsolete?

AnotherBlackHat Apples vs. Oranges. (734 comments)

Gasoline is a fuel.
Batteries store fuel (electricity).
Batteries are roughly comparable to gas tanks, not gasoline.

If for some reason you just want to only compare the fuels, compare gasoline to electricity.
One gram of electricity is more energy than you get from One tonne of gasoline. It's about 9 orders of magnitude better, energy density wise.
It's a completely bogus comparison too, but it at least it is more sensational.

For a fair comparison, compare the weight of everything it takes to make the wheels turn;
The gas, the engine, the cooling system/radiator, tail pipe and muffler, drive train, air filter, and so on, with everything on an electric car.

about 8 months ago
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Candy Crush Maker King.com Has Trademarked 'Candy' For Games

AnotherBlackHat Can we please sue these idiots? (169 comments)

No, not the idiots who trademarked "candy", the idiots who let them trademark candy.
As in, sue the people in the trademark office that approved an obviously flawed trademark, and force them to make restitution to the public.

about 8 months ago
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NYC's 250,000 Street Lights To Be Replaced With LEDs By 2017

AnotherBlackHat Re:Aren't HPS lights more efficient than LED? (372 comments)

High Pressure Sodium street lights are around 100 lumens per watt. HPS can be as low as 50 or as high as 150 depending various factors.
LED street lights are also around 100 lumens per watt, but they vary even more widely.
A theoretically perfect light source with a wavelength of 555 nm would emit 683 lumens per watt, so both LED and HPS are about 15% efficient.

Even the best HPS is less than 25% efficient, and the best LED isn't much better at just over 35%.
At 14.5 lumens per watt, an A19 incandescent 60 Watt bulb (i.e. a "normal" bulb) comes the closest to 97%, but it's 97% inefficient.

about a year ago
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NYC's 250,000 Street Lights To Be Replaced With LEDs By 2017

AnotherBlackHat LED street lights are over 100 lumens / watt. (372 comments)

Yes, it's you - you are so last year.

We aren't talking about those cheap $10 bulbs from Home Depot that get a measly 84 lumens/watt.

Commercially available LED street lights like Cree's LEDway have been over 100 lumens / watt since 2013-03, making them more efficient than high pressure sodium even without considering their arguably superior focusing and CRI.

about a year ago
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Two-Laser Boron Fusion Lights the Way To Radiation-Free Energy

AnotherBlackHat Re:Hooray for fusion! (140 comments)

If I'm crunching the numbers correctly, 1 gram of Boron produces 25,000 kWh of electricity - assuming perfect capture, 100% boron-11 and no other loses. (Granted, all unrealistic assumptions, but it's a starting point.)

If we replaced all electric generation on the planet (about 20 trillion kWh / year) it would take 800 tonnes of boron per year.

Turkey has the largest known Boron deposits at over a million tonnes or 1,200 years worth. And there are several other countries with large (thousands of tonnes) deposits as well, and that's just the Boron we know about.

All really rough estimates, but I don't think will run out of Boron fuel any time soon.

about a year ago
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Why Steve Albini Still Prefers Analog Tape

AnotherBlackHat Tape? Sure. (440 comments)

You want to give me a master copy on tape? Great!
I wouldn't say no to CD either, and pretty much any other format or media.

Just be sure there's at least one a digital copy in a lossless DRM free format included in the pile of copies you're giving me.

1 year,10 days

Submissions

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Cree Sets New R&D Performance Record with 254 Lumen-Per-Watt Power LED

AnotherBlackHat AnotherBlackHat writes  |  more than 2 years ago

AnotherBlackHat (265897) writes "LED lighting leader Cree, Inc., delivers another industry first with a barrier-breaking 254 lumen-per-watt white R&D power LED. This significant milestone exceeds Cree's previous R&D industry record of 231 lumens per watt."
Link to Original Source

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