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Submission Summary: 0 pending, 21 declined, 1 accepted (22 total, 4.55% accepted)


Submission + - Macroscopic wave–particle duality ( writes: A 'walking' drop on a liquid surface behave like a particle with wave properties: diffraction, interference patterns, vibration quantization.

First, in a vibrating container they put a liquid like silicon oil, vibrations are just bellow the Faraday instability threshold. Then a drop of the same liquid is dropped on the surface, but it does not coalesce, it bounces. And further bounces make a static wave pattern on the liquid surface just bellow the drop and its immediate neighborhood. As the spike grows, instability increases and the drop slides down the spike, and start moving horizontally.

Then they have a combo object drop+wave pattern moving at 1/10th the speed of wave in this liquid, straight. They call it a walker.

What is really amazing is that the wave pattern below the drop has some kind of memory: it has accumulated energy from several drop bounces. It can also make the drop see "forward", as the small wave pattern bounces back from nearby obstacles. So the drop is "aware" of its environment and "recall" the path it has followed.

Diffraction is observed and explained by the multiple reflexions the wave makes when the drop passes through a small hole, randomizing the wave pattern and the angle of the path afterward. Interference patterns observed are explained a la de Broglie: as the drop passes through one of the two holes, its associated wave passes through both, carrying forward the message of the second hole to the drop and changing the statistical repartition of the drop's path direction. One more stunning result: they are circling the drop by moving the container (Coriolis), then the associated wave adopts a discrete series of pattern, depending on the speed and radius. Very much like the energy quantization of electrons.
English (and French) abstract
A short article (French but it has photos and formulas)
Full thesis (French,10Mb)


Submission + - Ask Slashdot: Duke Nukem Unleashed, what gameplay? writes: The long awaited Duke Nukem Forever, the king of the vaporware, was — at last — finished this year. During those years I noticed that the Duke has many followers here on /.

This is why I ask the crowd:
What would you have liked to get instead of this disappointing game?
Or what the next Duke Nukem should be like ?

It seems everyone agrees with games reviews: they took out the fun that DN3D once had.

Obviously we want back:
maps free to explore, no more lame disneyland path to follow like a track.
10 weapons to carry (not counting fists and boots), quick change by keyboard (PC gamers), because choosing the perfect weapon for a job is fun.
fast Duke, not one that can't breath after a 10s sprint. And higher jumps also.

These are the minimum requirements.
And the paradox is that going back to this old gameplay would lead to a new kind of FPS among those we have today. Don't you think so?

Along with that I wonder if you have some other ideas.

Maybe the Ego thing is a good idea to keep, or some combination with life points ?

Interaction with the maps is poor in Duke Nukem Forever, it could be improved with the next Duke Nukem, but I know it is quite some work for developer teams. I think it doesn't matter if you can't destroy walls, doors, and furniture; but some new unusual and innovative map and object interactions should be worked out for the fun and the gameplay.

Then, humor and story are more a matter of taste.
I would suggest a worldwide contest to send new jokes, they will be kept secret unless discarded by some kind of small team of dedicated fans.
Collaborate to build a new story without telling the whole picture or all the details to gamers: do you have any experience in such participation?

Also: dying. Duke should die with more class. Bloody broken glasses aren't enough. Different kinds of death, maybe from another point of view, not with Duke's eyes.
By the way, are the other camera angles gone?

One last question:
How could we call the next Duke Nukem adventure ?
I suggest Duke Nukem Unleashed.
(by contrast to Duke Nukem Forever, very restrained)

I hope someone will be able to push those requirements and your answers to an editor, so the Duke that we like can come back... when finished !

Submission + - The old Prophecy trick strikes in StarCraft II writes: "When a writer just doesn’t know how to tell his new story or, worse, when he hasn’t yet any story to tell but needs to write one, he can make up a prophecy. To resort to a prophecy is an easy trick to make a story. He doesn’t even need to justify anything, to explain where the prophecy comes from or why it says so. The characters keep telling “the prophecy says...” or “according to the prophecy...” without any background or justification. The prophecy is just there. And of course each time a character talks about the prophecy, he is at least respectful and usually speaks with solemnity and deep eyes. Even the bad guys believe, and if someone laugh at it, then this is the moron, the dumb guy. Nobody in the story will challenge the prophecy or say it is crap or bullshit.

The writer can also lengthen the story by telling us how the characters discover the prophecy. Well, first they will have heard about it. Then they have to find the writings or someone telling the prophecy to them. Before that, they will have to get somewhere, break in something, quite a journey. Then, once the prophecy obtained, they need to decode it and interpret it. Besides later another reading of the same text will lead to another conclusion, this is a cheap way to start over a new stunning adventure in the story.

Everyone knows films, books, games which have used this prophecy trick as an easy make-up for a shallow story.

Why am I telling this ? Because I’m just tired of those prophecy stories, I’m sick of it. Enough. Please, can someone in Hollywood, in editors companies, in video game teams, tell them to stop using this trick ?

Last time I’ve seen this trick used, it’s in StarCraft II campaign (crystal missions). I though “Oh! No! Not again! Aaaargh ! The old Prophecy Trick strikes again! Damned! Shame on SC2 team.”

Don’t get it wrong: this game is really great. But come on: do we really need to be treated like that? (And the Zerg burrow capacity explanation remind me the midi-chlorians in Star Wars 1... What a pity to add non-sense to the mystery.)

Does this prophecy trick also upset you and did you saw it in use recently ?"

Submission + - Car black box camera DVR : efficiency and law ? ( writes: "Just in case I get involved in an car accident, I want to install one of those car black box to record a front view video while driving.

I believe it could help prove which side was wrong. It could be usefull if I'm wrongly accused of speeding or having a red light. Or to know who has damaged the car while parked.
Some of those devices can record two video chanels, 3D g acceleration, GPS position (with speed), HD video (for plate and face identification).

I'm sure some of you have experimented such geeky device :)

Could you share your experience ? Is it efficent ? Is there any problem with it regarding your country/state's law ?"

Submission + - March 25th : first Procrastination Day ( writes: "Today, March the 25th of 2010, is the first worldwide procrastination Day.

As you may have guessed, the purpose of this day is to celebrate the procrastination by deferring every today tasks to tomorow.

I just wonder... could we celebrate this day a bit later ?"


Submission + - France threatens music majors for catalog release ( writes: "French President N. Sarkozy asks for the majors to release their catalog to all platforms of music downloading.
The majors have fought against this proposal suggested by a government commission. They didn't expect such requirement during the president's 2010 wishes. Universal COE was standing KO as he thought that his lobbying has been successful.

Translation of the last part:
N. Sarkozy gives a year to the majors so they can negotiate rights and "liberate" their music files on all platforms. Failure to do so, they will have to "bargain rights under the law of compulsory collective management through civil societies," he said. For the majors, it's everything they hate! Because a civil society distribute revenues without necessarily benefit producers at the expense of the authors ...
The President went even further by launching the idea of a unique gateway reference all the catalogs and music videos. "Do not complain that others do better than us, if we do not give us the means to do as well as they do," he said. If Sarkozy does not falter, it announced that the time of the omnipotence of American portals on cultural content may be gone soon ..."

It's funny.  Laugh.

Submission + - Cowboy Neal 3D soon available writes: "According to this thread there are plans to produce some Cowboy Neal 3D replicas through a rapid prototyping process.

I wonder if some other Slashdot celebrities would be available too.

<<Can we print...
7- Cowboy neal 3D?
Still waiting for the model...

— the 4th option silently replace uploaded models by the Cowboy Neal 3D model (coming soon).>>

I can't wait to see how it looks like!"
United States

Submission + - Global economic crisis anticipated for April 2007 writes: "According to this European think-tank, several practical consequences of the unfolding crisis will converge in April 2007, some of them are:
  • Acceleration of the pace and size of bankruptcies among US financial organisations: from one per week today to one per day in April
  • Spectacular rise of US home foreclosures: 10 million Americans out on the street
  • Accelerating collapse of housing prices in the US: — 25%
  • Entry into recession of the US economy in April 2007
  • Precipitous rate cut by the US Federal Reserve
  • Sudden drop of US dollar value against Euro, Yuan and Yen

About home foreclosures they mention Beacon Journal 11/01/2007, United Business Media 12/02/2007, Austin Business Journal 26/01/2007 and CNN Money on 25/01/2007.
They also mention scores of blogs appearing on the web and trying to review the on-going housing disaster and the stream of human tragedies, for instance My Real Estate Money or Foreclosure Pulse"

Submission + - Slashdot survey: more suggestions writes: "This survey about slashdot made me wrote some suggestions...

  • A kind of Slashdotpedia: after an interesting question I gather the best slashdoter advices and my own search to make a journal entry. I suggest that I could back-link my journal from the article, even if archived. Then anybody browsing the article later could see that a guy has made a summary, a best of, enriched with his own work. Also those slashback summaries could be listed in a slashdotpedia section for great value added content (from a nerd point of view). See my three journal entries as an example.
    This mod is an easy one, few resource needed, work done by dedicated /.ers

  • As a registered user I'd like to know which issues I've seen (loaded/clicked) and which articles also. Slashdot would need to keep a database of this, I guess you can't afford such a load. Benefit: I can read later just what I've missed, I don't need to keep track of read/unread items.

  • I like those topic pics :) showing up along with articles, but we should see more often two pictures for an entry that could fit in several sections. I guess those new tags can help also.

  • There's some space on the title bar that could be used for this:
    Display a kind of flag array (very small icons) to tell what is the mood of the discussion. Then we could at a glance see that they started (mainly) to joke / troll, or that they are serious with great feedback. It's a kind of automatic tagging but not for topics/content, only for mood/kind-of-answers/readers-behaviour.

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