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Why Drones Could Be the Future of Missile Defense

joe_kull Re:SBX-1 (167 comments)

Setting aside the idea that it doesn't matter whether there are decoys in the payload of an ICBM if you shoot it down during boost phase for the moment, effective decoys aren't trivial for a country like North Korea to add to their vehicles due to weight.

Good analysis of this issue is at Arms Control Wonk (there is a particularly good discussion in the comments section).

more than 2 years ago

Groupon Not Doing So Well On Wall Street

joe_kull Re:Show me the money (140 comments)

On the other hand, Google IPO'd at $85 in 2004 and is at just under $600 now.

more than 2 years ago

Terahertz Wireless Chip Will Bring 30Gbps Networks

joe_kull Re:Next mod... (177 comments)

On the other hand, non-ionizing radiation is also used in microwave ovens. (And radars, which is why large radars have hazard zones.)

more than 2 years ago

Terahertz Wireless Chip Will Bring 30Gbps Networks

joe_kull Re:What about saturation? (177 comments)

Traditional wifi uses omni-directional antennas that propagate in spheres (roughly). If you want to see a good example, turn on a few light bulbs, and notice how they all overlap in coverage. Fifteen light bulbs will have a *lot* of overlap, and you'll start stepping on each other. 2.4GHz wifi is particularly bad this way, due to neighboring channels overlapping.

Directional antennas propagate in cones (roughly, again). A good example of this is a flashlight. You can turn on a whole lot of flashlights before you start seeing the same amount of overlapping. The downside is that it's hard to light up a room with a flashlight, so you have to start doing a lot of tricks to move a portable device around but maintain a connection.

I can't really explain RF propagation with a car analogy, so you'll have to settle for flashlights and light bulbs.

more than 2 years ago

Terahertz Wireless Chip Will Bring 30Gbps Networks

joe_kull Re:What about saturation? (177 comments)

I know it's traditional to skip reading the article, but the summary points out that this will be a directional-only signal. Directional signals generally don't have saturation problems, because they propagate (to simplify) in cones rather than spheres.

more than 2 years ago

Stroke Victim Stranded At South Pole Base

joe_kull Re:Ehmm (264 comments)

I hear C-17s are also pressurized. In fact, pretty much every plane that regularly flies far enough to be of use in any rescue would be pressurized. It's not the 1940s any more.

more than 2 years ago

Are Folding Containers the Future of Shipping?

joe_kull Re:"Reducing the number of container ship movement (188 comments)

That's not 100% true. It would be in a flat world, or a world where all trade was between two parties, but the international system is much more complicated than that.

more than 2 years ago

New Mac OS X Trojan Hides Inside PDFs

joe_kull Re:Nothing to see.. (194 comments)

Oh, don't worry. Nobody clicks through to the articles anyway.

more than 2 years ago

Sprint Customers Face 5GB Hotspot Data Cap, As of Oct. 2

joe_kull Just in time! (222 comments)

You can blame this on Sprint's roll-out of the iPhone 5, coming next month.

more than 2 years ago

What Is the Most Influential Programming Book?

joe_kull Re:K&R C (624 comments)

Wow, 1978? That's only ten years after the first volume of The Art of Computer Programming.

about 3 years ago

NSA Makes Contribution To Apache Hadoop Project

joe_kull Re:Why an Apache donation (102 comments)

Works of the US government are public domain, and thus can't be released under the GPL. That's the copyright issue mentioned in the summary.

(I know people here don't read the articles, but don't they at least read the summaries?)

about 3 years ago

BEAR Robot Designed To Rescue Wounded Soldiers

joe_kull Re:Combat situation (104 comments)

As an American soldier, I'll come out and say that I'd rather the Taliban shot the robot than the real medic. View these like bomb-disposal robots: they're not intended to be better at the actual task (inspecting a bomb or dragging a casualty) than a human, they're intended to do these tasks in situations where you'd hesitate to risk a human. Or, given that most medics I've known will take the risk anyway, at least give the human another option.

more than 3 years ago

Why Beatrix Potter Would Love a Digital Reader

joe_kull Re:huh? (98 comments)

Battery life.

more than 4 years ago

Microsoft Docs Indicate Future Xbox 360 Support For USB Storage

joe_kull Re:Oy (130 comments)

16.5GB ought to be enough for anyone.

more than 4 years ago

Firefox 4.0 Goes Chrome, New UI In Q4 2010

joe_kull Re:of all the things to copy from Chrome (556 comments)

On the other hand, on a small (netbook-sized) monitor it's very handy to have a UI like Chrome, where the extra 30 or so pixels of screen height saved by omitting the title bar make up 5% of your overall display height.

about 5 years ago

Why There's No iTunes For Movies

joe_kull Re:False right (474 comments)

He's not asserting it as a right. He's saying that there's a giant untapped market available, and that distributors are foolish to not take advantage of that.

more than 5 years ago


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