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


Forgot your password?
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×

Comment Re:Limit of Energy Density (Score 1) 143

Not for airplanes, as the fossil fuel burns away, so the total plane weight get significantly lighter at the end of its journey (sometimes half the weight).

I'd think for an airplane it would be have to be at least x1.5 the density.

(IANAAE... nowadays, but i trained as an Aerospace Engineer last century ;)

Comment Would have loved this in 2005 in London (Score 3, Interesting) 130

I lived in London in 2005 when the terror attacks happened there, and my morning commute took me through kings cross. That day with the mobile network switched off, it was hard to let people know I was ok, know if my girlfriend was, and many other people I knew took. Sure there was landlines to call direct if you knew where people were, or email as a bit of a broadcast I'm ok, but something like this would have been far better.

Comment Re:Zune or Xbox? (Score 1) 712

Actually, for me, well I too had an early iPod, then gf a mini, then the 1st genNano (still my favorite - awesome size, weight, function, etc), a 1st gen iPhone, the a replacement Nano 6th gen, but when the time came to replace the dead iPhone... Well I had a choice, iPhone, or iPad & boring old phone. I went iPad 3G, and really it's a brilliant bit of kit, far better for commuting on trains etc for reading.
I too had a laptop (1st gen Air - a long list of Mac kit either side), but I found I didn't use the Air any more... So I sold it, replaced with a mini, screen, etc, and haven't missed it at all.
So yeah, it's had not to lust after the next shiny apple thingy.... But the iPad is really a great piece of kit - even better than that newton 2100 I had (although that had replaceable batteries at least! But it's corners we're way to pointy)

Comment Re:It's not "the UK". (Score 1) 145

Actually, I a particularly English way, there is a separate force, City of London Police, for the City. But the City is quite small, and apart from St Paul's you'd be lucky to have anything a random outsider to London would consider London in it... Like Big Ben, Buckingham Palace etc... They are covered by the Met. The City Police cover the square mile and not much more.



Submission + - Reactors in Fukushima have 23 sisters in US (msn.com)

cultiv8 writes: "The General Electric-designed nuclear reactors involved in the Japanese emergency are very similar to 23 reactors in use in the United States, according to Nuclear Regulatory Commission records.

The NRC database of nuclear power plants shows that 23 of the 104 nuclear plants in the U.S. are GE boiling-water reactors with GE's Mark I systems for containing radioactivity, the same containment system used by the reactors in trouble at the Fukushima Daiichi plant. The U.S. reactors are in Alabama, Georgia, Illinois, Iowa, Massachusetts, Michigan, Minnesota, Nebraska, New Jersey, New York, North Carolina, Pennsylvania and Vermont."


Submission + - Survey: 41% of Facebook Users Total IDiots (allthingsd.com)

plastick writes: In an experiment, 41% of Facebook users were willing to divulge highly personal information to a complete stranger. This according to IT security firm Sophos, which invited 200 randomly selected Facebookers to befriend a bogus Facebook user named "Freddi Staur" (an anagram of "ID Fraudster"). Of those queried, 87 responded to the invitation, among them 82 people whose profiles included personal information such as their email address, date of birth, address or phone number. In total:
  • 72% of respondents divulged one or more email address
  • 84% listed their full date of birth
  • 87% provided details about their education or workplace
  • 78% listed their current address or location
  • 23% listed their current phone number
  • 26% provided their instant-messaging screen name


Submission + - Expert summary of the Fukushima Nuclear Accident (theenergycollective.com) 1

Bizaff writes: Along with reliable sources such as the IAEA and WNN updates, there is an incredible amount of misinformation and hyperbole flying around the internet and media right now about the Fukushima nuclear reactor situation. In the BNC post Discussion Thread – Japanese nuclear reactors and the 11 March 2011 earthquake (and in the many comments that attend the top post), a lot of technical detail is provided, as well as regular updates. But what about a layman’s summary? How do most people get a grasp on what is happening, why, and what the consequences will be?

Below I reproduce a summary on the situation prepared by Dr Josef Oehmen, a research scientist at MIT, in Boston. He is a PhD Scientist, whose father has extensive experience in Germany’s nuclear industry. This was first posted by Jason Morgan earlier this evening, and he has kindly allowed me to reproduce it here. I think it is very important that this information be widely understood.

Slashdot Top Deals

A computer without COBOL and Fortran is like a piece of chocolate cake without ketchup and mustard.