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Comment: Re:Self-policing always works! (Score 1) 179

by UnixUnix (#49644247) Attached to: Is Facebook Keeping You In a Political Bubble?
If you want to see all posts from certain users make them Close Friends and/or create lists putting a few in each, they act as independent Newsfeeds. Pruning of your main Newsfeed is inevitable if you have a few hundred Friends or more, I don't quite like it but hey, drilling over to someone's Timeline takes just one click. As for FB politics I wouldn't take it too seriously, my Friends run the gamut from radical left to extreme right. I choose them for being smart, witty, eloquent or outrageously amusing. Or having great boobs.

+ - The most energetic particles in the Universe dwarf the LHC

Submitted by StartsWithABang
StartsWithABang writes: When it comes to the Universe, you might think that energy really is only limited by rarity: get enough particles accelerated by enough supermassive, super-energetic sources, and it’s only a matter of time (and flux) before you get one that reaches any arbitrary energy threshold. After all, we’ve got no shortage of, say, supermassive black holes at the hearts of active galaxies. And yes, we do find cosmic rays hundreds, thousands or even millions of times the energy that the LHC can achieve. But when we think about the Universe in detail, these cosmic rays aren’t unlimited in their energy, but are rather stopped in their tracks by the most unlikely of sources: the ultra-low-energy cosmic microwave background, left over some 13.8 billion years after the Big Bang.

+ - This $9 computer might be more useful than Raspberry Pi->

Submitted by colinneagle
colinneagle writes: A small team of engineers and artists that make up Next Thing Co. launched a Kickstarter campaign today for Chip, their $9 single-board computer that boasts Wi-Fi, Bluetooth, and a larger processor than Raspberry Pi's most powerful models.

The tiny device runs a 1 GHz R8 ARM processor, and comes with 512MB of RAM and 4GB of storage. In comparison, the Raspberry Pi B and B+ models feature a 900 MHz quad-core ARM Cortex 7 processor. The Chip comes with a built-in composite output to connect to monitors and supports adapters for VGA or HDMI. It runs Debian Linux and comes preloaded with the Scratch programming language for those who might be new to coding.

Most noteworthy, though, is the Pocket Chip – a small device with a crude-looking screen and hard-key keyboard that plugs into the Chip and makes for portable computing. It may not be an iPhone killer, but it's an impressively inexpensive mobile form factor.

Link to Original Source

Comment: Pump it up (Score 1) 298

by UnixUnix (#35278490) Attached to: Has the Second Dotcom Bubble Started?

Is a bubble coming? Well, is a valuation something passably sophisticated -- or is it a version of "Facebook has 500 million users... how much is a user worth?...oh, say, 100 bucks... presto, $50 billion!"

Maybe Google's IPO idea of "e * appropriate power of 10" lends a false air of accuracy -- all those digits! Not pulled out of thin air either.

PS. Ads? What ads? Facebook has ads?!?

Comment: Hindsight is 20/20... (Score 3, Insightful) 738

by UnixUnix (#33956500) Attached to: China Now Halting Shipments of Rare Earth Minerals To US
...but even so, was it THAT difficult for a number of US Administrations to realize the strategic inportance of rare earths, instead of standing idle while US production dwindled into nothingness? So now, hello urban mining. Good thing I still have my old cell phones, they might fetch a price.

+ - Moving Monopoles Caught on Camera->

Submitted by Thorfinn.au
Thorfinn.au writes: Science Daily is reporting on magnetic monopoles.
For decades, researchers have been searching for magnetic monopoles — isolated magnetic charges, which can move around freely in the same way as electrical charges. Magnetic poles normally only occur in pairs. Now a team of researchers at the Paul Scherrer Institute (PSI) in Switzerland and University College Dublin has managed to create monopoles in the form of quasiparticles in an assembly of nanoscale magnets and to observe how they move using a microscope at the Swiss Light Source (SLS) to make the magnetic structures visible.
As with the elementary monopoles, which were first predicted by the British physicist Paul Dirac in 1931, each monopole is connected by a "string" to a monopole of opposite charge. The two monopoles can nevertheless move independently of each other. These results are not only of scientific interest, but could also provide a basis for the development of future electronic devices. The results are published online in the journal Nature Physics (Oct. 17, 2010).

Link to Original Source

Comment: Re:Lies, Damn Lies and Theft! (Score 1) 525

by UnixUnix (#32369252) Attached to: Sudden Demand For Logicians On Wall Street
Front-running, sub-pennying and similar shady practices are indeed part of the landscape. However, almost all high-speed traders do it. The issue seems (to me at least) to be something else: how to out-do opponent momo (momentum trading) algorithms. There there is room for detecting others' strategies and adapting yours accordingly to gain an advantage.

Comment: Re:Practical Joke? (Score 1) 525

by UnixUnix (#32368986) Attached to: Sudden Demand For Logicians On Wall Street
It is not necessarily a joke. Ordinals do show up in the study of finitary objects. E.g. formal deductions in Peano Arithmetic are finite strings of symbols, but their proof-theoretic analysis leads to countable ordinals up to epsilon_0. Or, the analysis of Goodstein sequences or the Hydra game again proceeds most smoothly by assigning countable ordinals to numbers or tree nodes. Closer to CS, program-correctness work going back to Dijkstra involves ordinals (I still remember him staring at the blackboard working out the order type of a particular case). To be fair, their usage here in the analysis of trading strategies, which are finite AND BOUNDED objects may be a bit of overselling. Enjoy it until HFT gets banned!

All constants are variables.