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Engineers Develop 'Ultrarope' For World's Highest Elevator

quenda Re:Worthless (148 comments)

Another way is to have long, fast express elevators stopping every 20 floors of the top half, and ground.

6 hours ago
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Engineers Develop 'Ultrarope' For World's Highest Elevator

quenda Re:Why use a cable? (148 comments)

Such lifts certainly exist, and are used on construction and industrial sites.
I expect noise, speed, power use and maintenance cost might be areas where cable wins out.

http://www.gedausa.com/rack-an...

6 hours ago
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Doomsday Clock Moved Two Minutes Forward, To 23:57

quenda Re:^^Winner (215 comments)

I don't know a lot about the US. But of course it has always been ruled by the elite - the founding fathers were from the 1%, and the "revolution" was just a change of management that did nothing to benefit the common man. But while fearful of mob rule, they felt a greater duty to the commoners than today's politicians seem to. (or at least the white commoners)

  The recent development I think is the power of the corporations, rather than just wealthy individuals. The corporations seem to have less collective conscience.

yesterday
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Doomsday Clock Moved Two Minutes Forward, To 23:57

quenda Re:^^Winner (215 comments)

Yeah, democracy in the Western sense, where you only have two parties

No, thats just the US, and other countries with first-past the-post voting system.

they are both stooges to the corporations and have no real power.

Talking about the US again? Though that is only a relatively recent development.

2 days ago
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Doomsday Clock Moved Two Minutes Forward, To 23:57

quenda Re:^^Winner (215 comments)

They might even get away with a C-

For what? Voting in a dictator counts as a democracy, does it? The Russians dabbled in democracy, and then rejected it.
In the context of an English-language forum, modern democracy means a multi-party parliamentary system with rule of law, as invented by the British. Without an effective opposition, the parliament becomes a rubber stamp for the executive, and politicians stop caring about votes. In some countries this can work better than a multi-party system, but it functions very differently from a democracy in the Western sense.

2 days ago
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NASA Considers Autonomous Martian Helicopter To Augment Future Rovers

quenda Re:There Is A Better Solution (83 comments)

Nature evolved legs for dealing with rough terrain. NASA needs to start using walking rovers, not rolling rovers.

Ah, but when man first invented the wheel (long after metallurgy and shipping) there was a great thunderclap from the heavens as God slapped his forehead and said "Why didn't I think of that?".

We can look to nature for inspiration, but have you ever seen the old film of the early plane with flapping wings?

2 days ago
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NASA Considers Autonomous Martian Helicopter To Augment Future Rovers

quenda Re: Lift? (83 comments)

No, a balloon is not so easy. With 1% the atmosphere, you need a 100X bigger balloon than on earth. And mind those winds.

But an aerofoil / rotor has advantages - first it only needs 40% of the lift (lower gravity) .
More significantly, while lift is linear to air density, lower pressure also means reduced drag on the rotor, allowing faster rotation and/or bigger rotors (lift proportional to area).

Drag formula is similar to lift, so with the same power, you can spin the rotor 10x faster to get the same drag and lift as on earth. (force = density x velocity squared ... )
In practice, you make the rotors bigger and slower, but you get the idea . Aerofoils work better than balloons in low pressure.

(IANAAE)

2 days ago
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Bomb Threats Via Twitter Partly Shut Down Atlanta's Hartsfield Airport

quenda Re:Other than the obligatory security theatre... (109 comments)

For example, could one have a missile/chaff specifically designed to choke a jet non-explosively and use towing cables to drag the plane somewhere it could be allowed to glide down?

:-) I think you've been watching way too many Hollywood movies.

2 days ago
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Doomsday Clock Moved Two Minutes Forward, To 23:57

quenda Re:^^Winner (215 comments)

Russia is a democracy.

Ha, good one Trollston! You had me there for a minute.

3 days ago
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Bomb Threats Via Twitter Partly Shut Down Atlanta's Hartsfield Airport

quenda Re:Other than the obligatory security theatre... (109 comments)

Remember 9/11? You damn well better believe the fighters would shoot the plane down if it strayed.

Are you subscribing to the conspiracy theory that the 4th plane was shot down?
And the authorities cannot distinguish between a bomb-threat and a hijacking?

3 days ago
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Google Just Made It Easier To Run Linux On Your Chromebook

quenda Re:But is that what people are actually doing? (169 comments)

With physical access, you can reflash the bootloader. There is a write-protect screw in some models.

And why would a user reboot? By the time he does, its too late - the google password has been changed, and his data sucked out of his google-drive.

3 days ago
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At Oxford, a Battery That's Lasted 175 Years -- So Far

quenda Re:Hold your horses (210 comments)

FTA, it takes around 1 nanoampere to ring the bell once. It rings around around 2 Hz. Thus it takes 2 nanoampere a second, which works out to 7200 nanoampere-hours.

Ouch! Your bad maths is making my head hurt. Amp is a measure of current, not energy or charge.
  A nA is one nano-couloumb per second. WTF does "nanoampere a second" even mean? Current acceleration?
  One nano-Amp for an hour is precisely one nano-Amp hour, duh!
Better known as 3.6 microcoulombs. At 2kV, it is 7.2 milli-joules of energy.
For that idiocy you get a +5? Mods need to stay in school.

The better AAs produce 3 amp-hour of power. That is 3000000000 nanoamperes.

FFS! First you equate amp-hours with power, and then you equate it with amps. Where did the time unit go?
Your 3AHr battery at one nano-Amp will last 3 x 10 to the 9 hours, or 342,000 years. (neglecting internal leakage :-)
Of course you will need a few of them in series to equal the 2kV of the Oxford Bell.
What has happened to /.?

(disclaimer: After that rant, I'm almost certain to have made an error myself.)

4 days ago
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Google Just Made It Easier To Run Linux On Your Chromebook

quenda Re:Again, why? (169 comments)

If you have a Chromebook, Google has already made ChromeOS support anything that the Chromebook will have to do.

Oh, no they have not.

A macbook can install 3rd party apps out of the box. It is not locked down.
But if you want Skype, Minecraft, or Steam for example, on a Chromebook, you need to unlock it (developer mode, unsupported) and install a full Linux environment first.

But yes, no need to replace ChromeOS, just supplement it.

4 days ago
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Google Just Made It Easier To Run Linux On Your Chromebook

quenda Re:But is that what people are actually doing? (169 comments)

I thought they were wiping the Chromebook's internal drive, then reinstalling with their preferred Linux variant.

Why do that? Chromebook is already running Linux, and you can easily install a full Ubuntu (or whatever) environment under ChromeOS, running them side-by-side, using Crouton scripts.
No need to reboot. A bit like a using a virtual machine, but its all native.

The biggest problem is having to wipe all your data when switching to developer mode, and Google considers this a feature. Couldn't they just encrypt the private data instead? I cannot see the point. If a bad buy gets hold of your Chrome-book and switches to developer mode, he can just install a login screen that grabs your password, and gets all your private data from the cloud.

4 days ago
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Should Disney Require Its Employees To Be Vaccinated?

quenda Re:Yes. (660 comments)

Freedom unfortunately also includes the ability to use one's power to infringe the freedom of weaker people.

No, thats not at all what we mean by a free country. It started 800 years ago with the Magna Carta (the great granddad of the US constitution) which (attempted to) limit the power of the Monarch.
Freedom means freedom of the individual, (and of local authority, originally the Lords).

What you describe is called "anarchy". (Or, in the US, "libertarianism")

4 days ago
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Should Disney Require Its Employees To Be Vaccinated?

quenda Re:Where is the line on other health aspects thoug (660 comments)

All that "hippy stuff" may well have some relevance to flu, but vitamins won't do anything to stop you catching measles if you are exposed and not immune.
There are good arguments against flu vaccine, but measles should be a no-brainer. It is safe and effective. Nothing else is.

4 days ago
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Should Disney Require Its Employees To Be Vaccinated?

quenda Re:Yes. (660 comments)

Thats seriously fucked up. Have you considered emigrating to a free country?

4 days ago
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Should Disney Require Its Employees To Be Vaccinated?

quenda Re:Yes. (660 comments)

Some 90 percent of people who use a drug—the overwhelming majority—are not harmed by it.

But those 10% of caffeine addicts will do anything for just one more shot of espresso.

4 days ago
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New Advance Confines GMOs To the Lab Instead of Living In the Wild

quenda Re:Until... (130 comments)

Righto -- statistics is in favor of evolution not happening. Gotcha.

Yes, like statistics favour mice not evolving functional wings in the next few thousand years.

5 days ago
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The Camera That Changed the Universe

quenda One of many (76 comments)

It is a little sad that while at least seventeen of these giant telescopes have been launched by the US alone, only one has ever looked up.

5 days ago

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