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Comment TI's were predicted, confirmed previous to this (Score 1) 238

Topological Insulators (2D and 3D) are strange, but definitely not an "IF". Check this: http://arxiv.org/abs/1002.3895 from 2010. Several have been predicted and confirmed experimentally previous to this.

SmB6 is great because it's not based on weak interactions (like other topological insulators) but on strongly-correlated electrons, and the new relation of the Kondo insulator to the Topological Insulator.

Comment selection at video stores better than Netflix (Score 1) 547

Look at top-film lists for any genre or time-period and then see which of those are available on Netflix (streaming). It's less than 1 in 10. Then look at new releases. Very few are available on Netflix for download. Selection is a big divider for Netflix and brick/mortars. These two areas (popular/classic favorites and new releases) are Netflix weaknesses that are local video store strengths. Hang on to these and try to do them well.

Common weaknesses are general selection. The fact is there are millions of movies out there, and not even Netflix can offer all of them. I'd really like to see all the films of Francois Truffaut, for example, but you can't on Netflix. You also can't at your local video store. But this is where I like what another slashdot commentor said: let the user sponsor the dvd. I think they said through buy-back, which is a good option if the store wants the disc, but if not, I'd also let them purchase the dvd and share in any profits from rentals and let them own the disc after a time if no one's renting it.

One area where video rentals could have innovated 10 years ago but are still resisting is in video research. Put up a kiosk in your store where people can do movie research and that shows them whether the movie they want is available (for rent, and whether currently in-stock) in your store. Put this online too, so people can look it up before they drive all the way to your store. You already have computerized systems that tell the store the same info, so it can't be too hard to make it available to the customers. Even Netflix is squandering this possibility, especially since they split the dvd and streaming business lines. Now when you search for a movie that is not in their streaming-only system, it doesn't show you the title and say 'sorry-not available for streaming' or give you the option to rent-by-mail, it actually suggests totally different movies, making you think you entered the wrong title or something. And while you're at it, give the users a flat-screen tv to watch movie trailers on while they're there.

There are ways for brick/mortar's to survivce for a bit longer, but I give dvd/hd rental companies 3-5 years max, for the ones that really try to hang on. The ideas I've given above are areas where locals can offer big advantages over digital streaming services, but those wrinkles will be ironed out soon enough in streaming. I guess then you could try to target poor areas where the net isn't ubiquitous. Long-term, perhaps there is a way to take advantage of the meat-space aspect of local stores, but I can't think of any, except for the general fostering of community. Sorry I can't help in this area, but if you want to survive long-term, it's got to be in the community--something that puts customers face-to-face and interacting in a fun way.

Comment News can be easily improved (Score 1) 839

I'd like to be able to select only the newscast segments I'm interested in, queue them up, and watch them all at once. In addition to removing bloat and irrelevant segments, it also would cut out those annoying teasers.

Added bonus (next gen): selecting to hear either the long or the short story for each bit.

Java

Submission + - Does Javascript suck?

allwheat writes: "I've been working on a personal project/webapp (and possible future mobile app) which involves html/css, php, and mysql. But I need some client-side functionality--specifically, I need forms that can be altered client-side before being submitted. So I've begun looking and was thinking about going with Javascript, but then I saw the leaked google email that said everything except Java sucks (http://tech.slashdot.org/story/11/08/02/0757254/email-in-oracle-google-case-will-remain-public). Does that statement include Javascript? Should I be going with Java instead?"
Microsoft

Submission + - Skype Goes After Reverse-Engineering (phoronix.com) 1

An anonymous reader writes: It appears that Microsoft's Skype Division is cracking down on reverse-engineering of the Skype client. Skype recently rolled out a new set of APIs for integration into other desktop applications, but they have issued multiple DMCA takedown notices to a researcher publishing open-source code to send Skype messages.
AI

Submission + - Scientists create massively parallel computer from (extremetech.com)

MrSeb writes: "A group of Japanese scientists have built a massively-parallel, brain-like computer out of an organic molecule called DDQ. This computer, which is built from 300 DDQ “neurons,” has successfully calculated how heat diffuses through a medium, and the mutation of normal cells into cancer cells. The work of Anirban Bandyopadhyay and his team from the National Institute for Materials Science in Tsukuba, Japan, revolves around a molecule called 2,3-dichloro-5,6-dicyano-p-benzoquinone, or DDQ for short. DDQ is a ring molecule that can connect with up to six neighboring DDQ molecules. Most importantly, each DDQ molecule can be programmed into four different states, each conducting electricity differently. 300 DDQ molecules are placed on a gold substrate, and their conductive states and connections to other molecules are programmed using a scanning tunneling microscope. The end result is a cellular automaton of 300 neuron-like molecules that can perform calculations in a massively parallel way. It is another characteristic of DDQ "brains" that is most intriguing: When a DDQ molecule changes state, the change ripples down through the molecules that it's connected to, destroying old bonds and creating new circuits as it goes — much like a neuron making new synapse connections. This could eventually lead to emergent computing, where the DDQ brain can react to external stimuli and evolve over time."

Comment I. Calculus. II. Differential Equations. III L... (Score 2) 358

First off, you should pick up an undergraduate text on "Modern Physics," which should include a really basic intro to both special and general relativity. Any text will do, but I own the one by Tipler/Llewellyn. This kind of text will be fairly light on the math, but will include some. This will also get you started with some really basic problems which should show that while you may not fully understand General Relativity (GR), you can do some really basic problems (e.g. gravitational redshift).

I. Calculus. Sounds like you already know some.

II. Differential Equations
        A. Ordinary
        B. Partial

III. Linear Algebra (Some texts teach ordinary differential equations and linear algebra together)

IV. Math Methods for Physicists (Arfken and Weber). Use this more for reference than for learning. Any math you need beyond the above set will be fairly specialized, so you can study by topic.

V. The best intro to relativity is in David J. Griffiths "Intro to Electrodynamics", a widely used textbooks for undergraduate physics majors. This only covers special relativity, but it's probably a really good place to start. For the graduate level, refer to Jackson's "Classical Electrodynamics," or possibly an easier equivalent.

VI. Another text by Griffiths is "Introduction to Elementary Particles", which includes some really useful stuff on relativity at the undergraduate level but for physics majors.

VII. (admission: I haven't studied General Relativity because I'm in another area of physics (CM), but I've harbored a secret desire to study it and maybe someday will steel away and do it.) A really common book is "Spacetime and Geometry: An Introduction to General Relativity" by Sean Carroll. I've flipped through this and it looks extremely well written, so when I do go ahead with my study, this is probably the book I'll select. Another good one is "A First Course in General Relativity" by Bernard Schutz. These are both graduate level texts, and I can't imagine there being an undergraduate level text.

This may take a long time and will be occasionally difficult, but it is certainly doable. Good luck.

Power

Underwater Nuclear Power Plant Proposed In France 314

nicomede writes "The French state-owned DCNS (French military shipyard) announced today a concept study for an underwater nuclear reactor dedicated to power coastal communities in remote places. It is derived from nuclear submarine power plants, and its generator would be able to produce between 50 MWe and 250MWe. Such a plant would be fabricated and maintained in France, and dispatched for the different customers, thus reducing the risk for proliferation."
Communications

NASA Seeks Ham Operators' Help To Test NanoSail-D 146

SEWilco writes "Despite our older headline, NanoSail-D was not 'Lost in space.' It was stuck in its canister. The solar sail nano-satellite finally ejected on Wednesday. The three-day countdown to sail deployment began then, so we'll have to see what happens next." And clm1970 adds "In another conventional use for an arguably unconventional hobby given the technology of 2011, NASA is requesting the help of Amateur Radio or 'ham operators' to help listen to a beacon signal of the nano-satellite. Many say the hobby is dying, but for every 'death knell,' it seems another application brings it back to life to prove its usefulness."
Data Storage

How Do You Store Your Personal Photos? 680

mxhf writes "I just came back from a four-week vacation to Mexico. This is the country for Aztecs and Maya Ruins and we visited plenty of them. Needless to say we took thousands of pictures with two cameras. Having arrived back home I realize that my hard-disk does not have enough space left to hold the additional 16GB that I collected on the other side of the globe. Now, my hard disk already is 250GB. I work exclusively on a laptop and do not want to change this. I know that there are larger disks today. But I figured that the time has come to finally move my image collection from my laptop to somewhere else. But where should I go? So, how do you store your photo collections? And how do you keep backups? These are obviously images that I want to keep for my life. So the need to survive fires, burglaries, etc. I think the amount of data I have rules online storage out. Should I just get two USB disks and leave one at a reasonably save location? I think this must be a common problem today. And yes — before you ask — I do know that the first thing to do is to go through your collection and dump what is not worth keeping."
Graphics

Facebook Images To Get Expiration Date 306

Pickens writes "BBC reports that researchers have created software that gives images an expiration date by tagging them with an encrypted key so that once this date has passed the key stops the images being viewed and copied. Professor Michael Backes, who led development of the X-Pire system, says development work began about 18 months ago as potentially risky patterns of activity on social networks, such as Facebook, showed a pressing need for such a system. 'More and more people are publishing private data to the internet and it's clear that some things can go wrong if it stays there too long,' says Backes. The X-Pire software creates encrypted copies of images and asks those uploading them to give each one an expiration date. Viewing these images requires the free X-Pire browser add-on. When the viewer encounters an encrypted image it sends off a request for a key to unlock it. This key will only be sent, and the image become viewable, if the expiration date has not been passed."
Programming

Polynomial Time Code For 3-SAT Released, P==NP 700

An anonymous reader writes "Vladimir Romanov has released what he claims is a polynomial-time algorithm for solving 3-SAT. Because 3-SAT is NP-complete, this would imply that P==NP. While there's still good reason to be skeptical that this is, in fact, true, he's made source code available and appears decidedly more serious than most of the people attempting to prove that P==NP or P!=NP. Even though this is probably wrong, just based on the sheer number of prior failures, it seems more likely to lead to new discoveries than most. Note that there are already algorithms to solve 3-SAT, including one that runs in time (4/3)^n and succeeds with high probability. Incidentally, this wouldn't necessarily imply that encryption is worthless: it may still be too slow to be practical."

Comment Re:By "west" you mean east, right? (Score 2, Interesting) 84

It's also common in Japan to say "the west" (seiyou (characters won't render on slashdot--why?)), to refer to what we also mean by 'the west,' meaning specifically europe instead of asia, but also referring to the U.S., and culturally, yes, it's fairly ambiguous. For example, in Murakami Haruki's 'All God's Children Can Dance', in the first vignette Omura is brought to a love hotel that looked like a "seiyou no shiro" (a western castle).

The Japanese word for west itself, nishi is commonly used for referring to Spain, as in nissei (a conjunction of nichi (nippon) and sei/nishi (west) meaning Japan-Spain (eg. Japan-Spain relations).

Of course, in spherical polar coordinates, north and south have non-circular definitions, but east/west is 2Pi-periodic. On the other hand, we do get a sort of branch cut with the International Date Line, so that to Japan, all the rest of the world is to the west. I'm guessing Japan is okay with this idea since it fits in with 'the Land of the Rising Sun', which it's too bad has nothing to do with Hemingway's "The Sun Also Rises."

On the topic of the article, I don't think this means the actual demise of game development in Japan, just the expansion beyond its own borders, which I think will be interesting to see how it turns out.

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I tell them to turn to the study of mathematics, for it is only there that they might escape the lusts of the flesh. -- Thomas Mann, "The Magic Mountain"

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