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Submission + - Scientists Discover How to Recover Lost Wallets

The Narrative Fallacy writes: "The Times reports that researchers left 240 wallets on the streets of Edinburgh last year to see how many were returned to their owners. The wallets were planted at random about a quarter of a mile apart and snapshots were inserted into a clear plastic window inside the wallets, none of which contained money. However, some of the wallets contained photographs of a baby, a cute puppy, a family or a portrait of an elderly couple while others contained a card suggesting the owner had recently made a charity donation. A control batch was also left containing no additional items. Those containing the picture of the infant were most likely to trigger an honest reaction from the finder, with 88 per cent being returned, followed by those containing pictures of the puppy at 53 per cent. Wallets containing the charity cards and the control sample were least likely to be returned, with rates of 20 and 15 per cent respectively. "The baby kicked off a caring feeling in people, which is not surprising from an evolutionary perspective," said Richard Wiseman, a psychologist who supervised the experiment. "We were amazed by the high percentage of wallets that came back.""

Submission + - What is the best algorithm for HAND sorting? 2

EricHsu writes: "I'm a teacher and I've often had to sort stacks of 20-100 papers by last name. For I while I did what I suppose most hand sorters do: I made a new stack and added new papers in order. I believe this is basically insertion sort, right?

After a while, this felt inefficient, particular since it's relatively slow to flip through the papers. So I tried a kind of bucket sort where I first sorted papers into four piles of lead letter ranges, like [A-F][G-M][N-S][T-Z], and then did an insertion sort on the piles. This seemed to go faster, but it was a bit confusing to remember which letters bounded each pile.

It seemed to me that someone must have thought about this harder that I have and that such a geek could be found on Slashdot. In particular, it seems to me that one could do a somewhat detailed study of hand-sorting algorithms by modifying analyses of computer sorting algorithms, which usually take into account number of comparisons and memory usage etc, taking into account human parameters like difficulty of flipping papers, difficulty of remembering the algorithm, how many papers one can hold easily in a single hand, difficulty of accessing piles as the number grows.

So, any careful analyses out there? Or failing that, any great hand sorting algorithms?"
Hardware Hacking

Submission + - Developer creates DIY 8-bit CPU (wired.com) 1

MaizeMan writes: Not for the easily distracted. A Belmot software developer's hand built CPU was featured in wired recently. Starting with a $50 wire wrap board Chamberlin built his CPU with 1253 pieces of wire, each wire wrapped by hand at both ends. Salvaging parts from 70's and 80's era computers, the final result is an 8-bit processor with keyboard input, a USB connection and VGA graphical output. More details on the developer's blog

Comment Re:all this data yet so much gets missed (Score 1) 139

.... also exitahead has a rss feed of music on ebay matching a lastfm profile so it has new music as well as older, hard to find, releases.

I think it is a healthy sign that lastfm have such a broad community of third party developers, but some of these add-ons really should be core features of their service by now. They seem to have been focused on trying to be social networking, neglecting their users that just want to find music.

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